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Ntt Docomo Inc patents (2016 archive)


Recent patent applications related to Ntt Docomo Inc. Ntt Docomo Inc is listed as an Agent/Assignee. Note: Ntt Docomo Inc may have other listings under different names/spellings. We're not affiliated with Ntt Docomo Inc, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "N" | Ntt Docomo Inc-related inventors


User terminal, radio base station and radio communication method

The present invention is designed to realize dynamic tdd that is based on tdd-fdd ca. A user terminal, by employing carrier aggregation or dual connectivity, performs radio communication via a plurality of cells including a primary cell, which is an fdd cell, and a secondary cell, which is a dynamic tdd cell, and has a receiving section that receives control information transmitted from the primary cell, and a cell-specific downlink signal transmitted from the dynamic tdd cell, and a control section that decides whether one or a plurality of subframes in the dynamic tdd cell are uplink subframes or downlink subframes based on the control information, and controls operations with respect to the dynamic tdd cell, and the control section executes control so that a subframe to receive the cell-specific downlink signal from the dynamic tdd cell and a subframe to retransmit uplink data are different.. ... Ntt Docomo Inc

Base station and user equipment

Some techniques for implementing proper rach-less handover control are provided. One aspect of the present invention relates to a base station including a communication control unit configured to control radio communication with user equipment, a capable cell information storage unit configured to store capable cell information indicating a rach-less handover capable cell and a rach-less handover determination unit configured to determine whether the user equipment is rach-less handover capable.. ... Ntt Docomo Inc

Radio base station, user terminal and radio communication method

The present invention is designed to reduce the overhead of reference signals for measuring csi in high-order mimo multiplexing technique. A radio base station is used in a radio communications system of a frequency division duplexing (fdd) scheme, and has a receiving section that receives reference signals for measuring time division duplex (tdd) channel state information, transmitted from a plurality of antennas provided in a user terminal, a measurement section that measures the channel state information, in a plurality of receiving antennas, by using the reference signals, a generation/selection section that generates an optimal precoding vector from the channel state information measured in each receiving antenna, or selects the optimal precoding vector from a set of precoding vectors that is defined in advance, and a transmission section that transmits a physical downlink shared channel, in mimo multiplexing transmission, by using the precoding vector selected in the generation/selection section.. ... Ntt Docomo Inc

Mobile communication system, radio base station, radio mobile station and mobile communication method

A mobile communication system that includes a first communication system, which features a user terminal that is present in a moving object, a first radio base station that forms a cell in the moving object, and a first core network that is connected with an external network, and a second communication system, which features a radio mobile station that is provided in the moving object, a second radio base station that forms a cell on the path of the movement of the moving object, and a second core network that is connected with the second radio base station. The first radio base station and the radio mobile station are connected via a user-plane interface and a control-plane interface between the radio base stations and the core networks.. ... Ntt Docomo Inc

Mobile communication method, mobile station, and radio base station

A reconnection procedure is successfully performed even when a connection destination radio base station does not manage “ue context” for a mobile station ue. A mobile communication method according to the present invention includes a step b in which the mobile station ue transmits cgi of cell #1 to a radio base station enb#2 in the reconnection procedure, and a step c in which the radio base station enb#2 acquires “ue context” for the mobile station ue from a radio base station enb#1 managing cell #1 designated based on the cgi when not managing “ue context” for the mobile station ue in the reconnection procedure.. ... Ntt Docomo Inc

User terminal, radio base station and radio communication method

The present invention is designed to implement dynamic tdd that does not rely on tdd-fdd ca-based tdd ul-dl configurations. A user terminal executes radio communication with a plurality of cells by employing carrier aggregation, and has a receiving section that, when a connection is established with a secondary cell serving as a dynamic tdd cell, receives control information, which is transmitted from a primary cell and which includes a dynamic command with respect to a subframe configuration of the dynamic tdd cell, and a transmission timing of an uplink signal, and a control section that decides whether or not one or a plurality of subframes in the dynamic tdd cell are uplink subframes or downlink subframes based on the control information, and, furthermore, controls the transmission timing of the uplink signal based on the transmission timing.. ... Ntt Docomo Inc

Motion video predict coding method, motion video predict coding device, motion video predict coding program, motion video predict decoding method, motion predict decoding device, and motion video predict decoding program

A video predictive coding system includes a video predictive encoding device having: an input circuit to receive pictures constituting a video sequence; an encoding circuit which conducts predictive coding of a target picture using, as reference pictures, pictures encoded and reconstructed in the past, to generate compressed picture data; a reconstruction circuit to decode the compressed picture data to reconstruct a reproduced picture; picture storage to store the reproduced picture as a reference picture for encoding of a subsequent picture; and a buffer management circuit which controls the picture storage, (prior to predictive encoding of the target picture), on the basis of buffer description information bd[k] related to reference pictures used in predictive encoding of the target picture, encodes the buffer description information bd[k] with reference to buffer description information bd[m] for a picture different from the target picture, and adds encoded data thereof to the compressed picture data.. . ... Ntt Docomo Inc

Motion video predict coding method, motion video predict coding device, motion video predict coding program, motion video predict decoding method, motion predict decoding device, and motion video predict decoding program

A video predictive coding system includes a video predictive encoding device having: an input circuit to receive pictures constituting a video sequence; an encoding circuit which conducts predictive coding of a target picture using, as reference pictures, pictures encoded and reconstructed in the past, to generate compressed picture data; a reconstruction circuit to decode the compressed picture data to reconstruct a reproduced picture; picture storage to store the reproduced picture as a reference picture for encoding of a subsequent picture; and a buffer management circuit which controls the picture storage, (prior to predictive encoding of the target picture), on the basis of buffer description information bd[k] related to reference pictures used in predictive encoding of the target picture, encodes the buffer description information bd[k] with reference to buffer description information bd[m] for a picture different from the target picture, and adds encoded data thereof to the compressed picture data.. . ... Ntt Docomo Inc

Motion video predict coding method, motion video predict coding device, motion video predict coding program, motion video predict decoding method, motion predict decoding device, and motion video predict decoding program

A video predictive coding system includes a video predictive encoding device having: an input circuit to receive pictures constituting a video sequence; an encoding circuit which conducts predictive coding of a target picture using, as reference pictures, pictures encoded and reconstructed in the past, to generate compressed picture data; a reconstruction circuit to decode the compressed picture data to reconstruct a reproduced picture; picture storage to store the reproduced picture as a reference picture for encoding of a subsequent picture; and a buffer management circuit which controls the picture storage, (prior to predictive encoding of the target picture), on the basis of buffer description information bd[k] related to reference pictures used in predictive encoding of the target picture, encodes the buffer description information bd[k] with reference to buffer description information bd[m] for a picture different from the target picture, and adds encoded data thereof to the compressed picture data.. . ... Ntt Docomo Inc

Method and apparatus for transmitting a discovery signal by a communication device

A method is presented for transmitting a discovery signal by a communication device to enable its discovery by other communication devices, said method comprising the steps of: encoding a resource hopping pattern in said discovery signal, said hopping pattern defining a sequence of resources, and repeatedly transmitting said discovery signal such for each of the repeated transmissions the resource which is used for the transmission, is chosen in accordance with the sequence of resources defined by the resource hopping pattern, respectively. Furthermore, a method for receiving a discovery signal transmitted by a neighbour communication device is presented, wherein a resource hopping pattern of said neighbour communication device in said received discovery signal is decoded.. ... Ntt Docomo Inc

Speech decoder with high-band generation and temporal envelope shaping

A linear prediction coefficient of a signal represented in a frequency domain is obtained by performing linear prediction analysis in a frequency direction by using a covariance method or an autocorrelation method. After the filter strength of the obtained linear prediction coefficient is adjusted, filtering may be performed in the frequency direction on the signal by using the adjusted coefficient, whereby the temporal envelope of the signal is shaped. ... Ntt Docomo Inc

Update management system and update management method

In an update management system including a plurality of servers executing a communication service, a server not connected to a network in which a new version of an application is operated is generated in parallel with a server in which an old version of the application is operated, and old and new correspondence data between an old version server and a new version server is generated and used to execute switching from the old version server to the new version server in a flow on the network and to execute switching-back to the old version server by referring to the old and new correspondence data at the time of occurrence of fault in a new version.. . ... Ntt Docomo Inc

Radio communication control method and radio communication system

Bf weight vector determination is executed for each of m number of streams. In a first stage, by repeating switching of transmission bf weight (transmission beam) candidates in a small base station, a transmission bf weight vector with the best reception quality in a user apparatus ue is selected from among tried transmission bf weight vectors. ... Ntt Docomo Inc

Speech decoder with high-band generation and temporal envelope shaping

A linear prediction coefficient of a signal represented in a frequency domain is obtained by performing linear prediction analysis in a frequency direction by using a covariance method or an autocorrelation method. After the filter strength of the obtained linear prediction coefficient is adjusted, filtering may be performed in the frequency direction on the signal by using the adjusted coefficient, whereby the temporal envelope of the signal is shaped. ... Ntt Docomo Inc

12/08/16 / #20160357490

Display apparatus and display method

Acquiring means acquires relevant information (for example, information indicative of an amount of processing that has been performed relative to the content based on a user's operation) relevant to content. Selecting means selects one or more content from among a plurality of content corresponding to a plurality of items of display information displayed on first display means, based on relevant information acquired by acquiring means for each of the plurality of content. ... Ntt Docomo Inc

12/01/16 / #20160353514

Mobile communication system and mobile communication method

Roles of a radio base station enb#1 managing a first cell and enb#10 managing a second cell in allocating resource to a mobile station ue in the second cell under execution of “inter-enb ca” using both the radio base stations enb#1 and enb#10 are appropriately prescribed. In a mobile communication system according to the present invention, the radio base station enb#1 allocates resource to the mobile station ue in the second cell based on information on the resource in the second cell, generates an rrc message including the result of resource allocation, transmits the rrc message to the mobile station ue, and notifies the result of resource allocation to the radio base station enb#10. ... Ntt Docomo Inc

12/01/16 / #20160353442

User apparatus, base station, and carrier aggregation control method

A user apparatus in a mobile communication system supporting carrier aggregation includes a measurement unit configured to measure a reception timing difference between component carriers; an information notification unit configured to notify the base station of information on the reception timing difference measured by the measurement unit; and a control unit configured to perform addition or deletion of a secondary cell in the carrier aggregation based on an instruction from the base station that receives the information.. . ... Ntt Docomo Inc

12/01/16 / #20160352403

User apparatus, base station, and communication method

A user apparatus configured to perform communication with a base station in a radio communication including the base station and the user apparatus, including: a transmission unit configured to transmit a plurality of uplink signals by a plurality of antenna ports or beams; and a reception unit configured to receive, from the base station that monitors the plurality of uplink signals, identification information of a specific uplink signal received by the base station; wherein the transmission unit transmits a data signal using an antenna port or a beam corresponding to an uplink signal that is identified by the identification information received by the reception unit.. . ... Ntt Docomo Inc

12/01/16 / #20160350523

Short-range communication device, function control method and function control system

A wearable module is a device capable of performing short-range communication with a mobile device. A functional section executes a function which can be locked and unlocked. ... Ntt Docomo Inc

11/24/16 / #20160345364

User apparatus, base station, and control information detection method

A user apparatus that communicates with a base station in a mobile communication system, including: a reception unit configured to receive a radio signal from the base station by a downlink control channel; and a control information detection unit configured to detect control information, addressed to the user apparatus, mapped to a predetermined area in a time frequency resource of the downlink control channel by performing blind decoding in a plurality of candidate areas which are candidates of the predetermined area, wherein, when the user apparatus performs a random access procedure, the control information detection unit performs the blind decoding in areas in which a part of areas is excluded from the plurality of candidate areas.. . ... Ntt Docomo Inc

11/24/16 / #20160345250

Macro-cell assisted small cell discovery and resource activation

A method is described for interference control among a first small cell base station and a second small cell base station in a wireless communication system having a plurality of small cell base stations controlled by a macro base station. The method has, in response to a request from the macro base station to the first small cell base station, performing, by the first small cell base station, a beacon transmission on one or more resources, in response to a request from the macro base station to the second small cell base station, performing, by the second small cell base station, a channel quality measurement on the one or more resources, and reporting the measured channel quality from the second small cell base station to the macro base station.. ... Ntt Docomo Inc

11/24/16 / #20160345224

Macro-cell assisted small cell discovery and resource activation

A method is described for controlling a user equipment to be served by a small cell base station in a wireless communication system including a plurality of small cell base stations controlled by a macro base station. The method includes signaling, by the small cell base station, the small cell base station capabilities to the macro base station; signaling, by the user equipment, the user equipment capabilities to the macro base station; and signaling, by the macro base station, a small cell base station configuration to the user equipment.. ... Ntt Docomo Inc

11/24/16 / #20160345216

User apparatus, base station, and communication method

A user apparatus configured to communicate with a base station in a radio communication system including a base station and the user apparatus, including: first reference signal reception means configured to measure a received power of first reference signals, transmitted from the base station, that are associated with a plurality of different identifiers, and to select a specific first reference signal; report means configured to report an identifier and a received power of the first reference signal selected by the first reference signal reception means to the base station or a macro cell base station; second reference signal reception means configured to receive a plurality of second reference signals transmitted from the base station; and measurement means configured to measure a reception quality of the second reference signals received by the second reference signal reception means, and to transmit feedback information based on the reception quality to the base station.. . ... Ntt Docomo Inc

11/24/16 / #20160345194

Macro-cell assisted small cell discovery and resource activation

A method is described for controlling a small cell base station and a user equipment to be served by the small base station in a wireless communication system having a plurality of small cell base stations controlled by a macro base station. The method has, in response to a request from the macro base station to the small cell base station, performing, by the small cell base station, a beacon transmission on one or more resources, in response to a request from the macro base station to the user equipment, performing, by the user equipment, a channel quality measurement on the one or more resources, and reporting the measured channel quality from the user equipment to the macro base station.. ... Ntt Docomo Inc

11/24/16 / #20160345193

User equipment, base station and uplink carrier aggregation communication method

One aspect of the present invention relates to user equipment having an uplink carrier aggregation function, comprising: a radio communication control unit configured to control radio communication with a base station; a radio positioning unit configured to perform a radio positioning function based on a radio signal received from a positioning system; and a radio positioning state reporting unit configured to report, when uplink carrier aggregation is configured, activation or deactivation of the radio positioning function to the base station.. . ... Ntt Docomo Inc

11/24/16 / #20160344534

User equipment and transmission control method

User equipment for transmitting an uplink control channel in multiple cells simultaneously in a radio communication system where transmission of the uplink control channel in a secondary cell is supported is disclosed. One aspect of the present invention relates to the user equipment, comprising: a transmission and reception unit configured to transmit and receive a radio channel to/from a base station via multiple cells configured for carrier aggregation; a simultaneous transmission availability determination unit configured to determine, in response to occurrence of an event where an uplink control channel is to be transmitted in the multiple cells simultaneously, whether the uplink control channel can be transmitted in the multiple cells simultaneously; and a transmission control unit configured to instruct the transmission and reception unit to transmit the uplink control channel in the multiple cells simultaneously if the uplink control channel can be transmitted in the multiple cells simultaneously and control transmission of the uplink control channel in accordance with transmission priorities corresponding to cell types if the uplink control channel cannot be transmitted in the multiple cells simultaneously.. ... Ntt Docomo Inc

11/17/16 / #20160338132

User equipment and uplink data transmission method

User equipment having a dual connectivity function to communicate with multiple base stations simultaneously, comprising: a pdcp (packet data convergence protocol) layer processing unit configured to generate packet sequences for transmission to respective ones of the multiple base stations from to-be-transmitted uplink data; and a rlc (radio link control) layer processing unit configured to transmit the generated packet sequences to the multiple base stations. The rlc layer processing unit includes: a rlc buffer configured to store packets transmitted from the pdcp layer processing unit and destined for the respective ones of the multiple base stations; rlc entities provided corresponding to respective ones of the multiple base stations, the rlc entities being configured to transmit the packets stored in the rlc buffer to the corresponding base stations; and a rlc entity control unit configured to control the rlc buffer and the rlc entities. ... Ntt Docomo Inc

11/17/16 / #20160338049

User terminal, radio base station and radio communication method

The present invention is designed to improve throughput and support various modes of use of radio communication systems when tdd is used in an environment in which the data traffic is unevenly concentrated on the downlink. A user terminal carries out radio communication with a tdd cell, and has a transmitting/receiving section that transmits and receives signals by using a ul/dl configuration, which includes a special subframe formed with a downlink time duration, a guard period and an uplink time duration, and in which dl communication is carried out in all subframes, and a control section that controls the arrangement of uplink demodulation reference signals based on the length of the uplink time duration constituting the special subframe.. ... Ntt Docomo Inc

11/17/16 / #20160337993

User terminal, radio base station and radio communication method

A user terminal receives configuration information of each small cell's discovery signal, establishes synchronization in at least one of time and frequency (sync #a) based on the discovery signal configuration information, and acquires first gap information, which represents gap in at least one of time and frequency. Also, the user terminal receives an association indicator, which represents configuration information of a measurement reference signal (csi-rs) that is associated with a demodulation reference signal (dm-rs) for a downlink shared channel, establishes synchronization (sync #b) based on the configuration information of the measurement reference signal represented by the association indicator, and acquires second gap information, which represents gap in at least one of time and frequency. ... Ntt Docomo Inc

11/17/16 / #20160337984

User terminal, radio base station and radio communication method

The present invention is designed so that mismatches in the recognition of tpc command-accumulated values between a radio base station and a user terminal are resolved in a simple way. The user terminal of the present invention provides a user terminal that transmits uplink channels, and that has a receiving section that receives transmission power control (tpc) commands from each of a plurality of cells that are grouped, a control section that controls the uplink channel transmission power of each of the multiple cells based on accumulated values of the tpc commands, and, when a reset condition is fulfilled in one of the multiple cells, the control section resets the accumulated values of all of the multiple cells.. ... Ntt Docomo Inc

11/17/16 / #20160337867

Mobile station, base station, uplink signal transmission method, and uplink signal reception method

A mobile station which communicates with a base station using an unlicensed band includes a resource management unit configured to manage information about an uplink transmission resource allocated by the base station; a transmission detection unit configured to detect whether transmission in the unlicensed band is possible before arrival of the allocated uplink transmission resource; and a transmission unit configured to transmit an uplink signal on the allocated uplink transmission resource, when transmission in the unlicensed band is possible.. . ... Ntt Docomo Inc

11/17/16 / #20160337866

Mobile station and uplink data transmission method

A mobile station which performs communication using a same bearer over component carriers belonging to different base stations includes a reception unit configured to receive a message including identification information of a base station to which uplink data are to be transmitted; a determination unit configured to determine a base station to which uplink data are to be transmitted according to the received message; and a transmission unit configured to transmit uplink data to the determined base station.. . ... Ntt Docomo Inc

11/17/16 / #20160337160

Base station, user apparatus, interference reduction control information notification method and interference reduction method

A base station configured to communicate with a user apparatus in a radio communication system executing carrier aggregation, including: a reception unit configured to receive, from an interference base station, control information that is used for the user apparatus to reduce an interference signal from the interference base station for a component carrier used by the user apparatus; a determination unit configured to determine whether a connecting cell corresponding to the component carrier and an interference cell formed by the interference base station satisfy a predetermined condition; and a transmission unit configured, when the determination unit determines that the connecting cell and the interference cell satisfy the predetermined condition, to transmit the control information to the user apparatus.. . ... Ntt Docomo Inc

11/17/16 / #20160337109

User terminal, radio base station and radio communication method

The present invention is designed to implement dynamic tdd that does not rely on tdd-fdd ca-based tdd ul-dl configurations. A user terminal executes radio communication with a plurality of cells by employing carrier aggregation, and has a receiving section that, when a connection is established with a secondary cell serving as a dynamic tdd cell, receives control information, which is transmitted from a primary cell and which includes a dynamic command with respect to a subframe configuration of the dynamic tdd cell, and a control section that decides whether or not one or a plurality of subframes in the dynamic tdd cell are uplink subframes or downlink subframes based on the control information, and, furthermore, controls operations pertaining to the dynamic tdd cell.. ... Ntt Docomo Inc

11/17/16 / #20160337009

Radio base station, master station apparatus, slave station apparatus, and control method

A master station apparatus modulates downlink digital control data that includes at least a synchronization signal and a control signal, adds resource element information to the modulated control data, and composites downlink digital frequency-domain user data that has not been modulated and data originating from the modulated control data to which the resource element information has been added. A slave station apparatus converts a received optical signal into an electrical signal, separates, from the electrical signal, the frequency-domain user data and the data originating from the modulated control data, modulates the frequency-domain user data, adds resource element information to the modulated user data, and transmits time-domain composite data including a component originating from the modulated user data and a component originating from the modulated control data by radio waves.. ... Ntt Docomo Inc

11/17/16 / #20160336981

Receiver, transmitter and radio communication method

A mobile station includes: a physical channel segmentation unit to receive radio signals including multiple orthogonal signals which are orthogonal to each other, and multiple non-orthogonal signals which are not orthogonal to each other; and data demodulating/decoding units to extract the non-orthogonal signal addressed to the mobile station from the multiple non-orthogonal signals by demodulating and cancelling the radio signal addressed to another mobile station by use of the orthogonal signals included in the radio signals received by the physical channel segmentation unit, and demodulate the signal included in the orthogonal signals and addressed to the mobile station, and the extracted non-orthogonal signal addressed to the mobile station.. . ... Ntt Docomo Inc

11/10/16 / #20160330737

User terminal, radio base station and radio communication method

. . The present invention is designed to improve throughput and support various modes of use of radio communication systems when tdd is used in an environment in which the data traffic is unevenly concentrated on the downlink. A user terminal carries out radio communication with a tdd cell, and has a transmitting/receiving section that transmits and receives signals by using a ul/dl configuration, which includes a special subframe formed with a downlink time duration, a guard period and an uplink time duration, and in which dl communication is carried out in all subframes, and a control section that configures the uplink time duration to constitute the special subframe to at least three symbols or more, and controls the allocation of uplink signals.. ... Ntt Docomo Inc

11/10/16 / #20160330734

Radio communication system, mobile terminal apparatus, wide area base station apparatus, local area base station apparatus and radio communication method

A user equipment is disclosed including a first receiving section that receives control information in a first cell and a second receiving section that receives a detection signal in a second cell based on the control information. In the second cell, the control information is used to specify a radio resource to which the detection signal is allocated.. ... Ntt Docomo Inc

11/10/16 / #20160330704

Broadcast information acquiring method, mobile device, and base station apparatus

In dual connectivity or inter-base station carrier aggregation, synchronization between base stations is achieved while preventing processing load from increasing in user equipment. A method of acquiring broadcast information when configuring or performing inter-base station carrier aggregation in a mobile communication system including a first base station, a second base station, and a mobile device connected to the first base station, includes the steps of, at the first base station, creating first broadcast information about the second base station, except for information as to synchronization between base stations and supplying the first broadcast information to the mobile device on a dedicated radio resource control signal; and at the mobile device, after receiving the dedicated radio resource control signal, receiving the information as to synchronization between base stations over a physical broadcast channel of a first cell of the second base station based upon the first broadcast information.. ... Ntt Docomo Inc

11/10/16 / #20160330695

Radio base station, user terminal, radio communication method and radio communication system

A radio base station applies non-orthogonal multiple access to a plurality of user terminals and transmits downlink signals, and this radio base station has a scheduling section that selects a user set to apply non-orthogonal multiple access to from candidate user sets, and selects a combination of a modulation and coding scheme and transmission power based on combinations of candidate transmission power. The radio base station includes a control section that decides whether or not the combination of the modulation and coding scheme and transmission power selected in the scheduling section is included in combinations that are stipulated in advance, and controls the scheduling section in accordance with the decision. ... Ntt Docomo Inc

11/10/16 / #20160328258

Management system, overall management node, and management method

A virtual server for executing a communication process is implemented on virtualization resources without being inefficient even when different virtualization resource management schemes are included. A management system included in a mobile communication system is configured to include an nfvi which is virtualization resources including a physical server in which a vnf to execute a communication process is generated and includes a vnfm for managing the vnf, a vim for managing the virtualization resources of the nfvi, and an orchestrator for managing all the virtualization resources of the nfvi, wherein the orchestrator includes a virtual server generation request section configured to input detailed information for implementing the vnf retained by the vnfm, rewrite the input detailed information according to a virtualization resource management scheme by the vim, and request the vim to generate the vnf.. ... Ntt Docomo Inc

11/03/16 / #20160323894

Radio communication system, common reception apparatus and user terminal

To suppress reduction in system performance for mobile communications (group mobility) in a plurality of terminals existing inside the same moving object, a radio communication system for a plurality of user terminals existing inside a moving object and a radio base station is described. The user terminal receives a signal transmitted from the radio base station, and transmits the signal transmitted from the radio base station to a common reception apparatus disposed inside the moving object. ... Ntt Docomo Inc

11/03/16 / #20160323873

User terminal, radio base station, radio communication system and radio communication method

In order to change pucch transmission cells appropriately, the present invention provides a user terminal that communicates with a plurality of cell groups each consisting of one or more cells using different frequency bands, the user terminal comprising: a reception section that receives a radio resource control (rrc) message; and a control section that selects at least one cell from cells that are configured for each of the cell groups and are allocatable with an uplink control signal, and controls the cell to be a cell for transmitting the uplink control signal, wherein when the rrc message includes a change instruction of the cell allocatable with the uplink control signal, the control section controls to transmit transmission acknowledgement information (harq-ack) in response to the rrc message in the cell before change.. . ... Ntt Docomo Inc

11/03/16 / #20160323756

Radio base station, mobile station and radio communication method

To improve system performance for mobile communications (group mobility) in a plurality of terminals existing inside the same moving object, a radio base station, which forms a cell on a moving path of a moving object to communicate with a mobile station provided in the moving object using beam forming, is provided with a transmission section that transmits a plurality of acquisition signals applied with different beam forming weights respectively to at least an edge region of the cell formed on the moving path of the moving object, and a control section that controls a beam forming weight to apply to a data signal transmitted to the mobile station, based on information notified from the mobile station receiving an acquisition signal.. . ... Ntt Docomo Inc

11/03/16 / #20160323078

User terminal, radio base station and radio communication method

A user terminal executes coordinated transmission with a plurality of cells, and has an estimation section that performs channel estimation by using a plurality of desired signal power measurement resources and interference signal power measurement resources, and a control section that controls feedback of csi processes by using a table, in which at least information about the csi processes is defined, the csi processes being combinations of estimation results of predetermined desired signal power measurement resources and estimation results of interference signal power measurement resources, and the control section switches between and uses a plurality of tables, in each of which information about different csi processes is defined. Thus, adequate execution of comp is allowed even in a structure with a high density of cells.. ... Ntt Docomo Inc

11/03/16 / #20160323076

User terminal, radio base station, radio communication method and radio communication system

A user terminal that communicates with a plurality of cell groups (cg), each group being formed with one or more cells to use different frequency bands. The user terminal receives downlink signals transmitted from each cell, and selects at least one cell, from cells to which uplink control signals can be allocated, and which are configured in each cg, and controls the cell as a cell to transmit an uplink control signal. ... Ntt Docomo Inc

11/03/16 / #20160321112

Management system, virtual communication-function management node, and management method

Leakage of detailed information for implementing a virtual server to execute a communication process on virtualization resources is prevented. There is provided a management system (10) included in a mobile communication system (1) configured to include an nfvi (60) which is virtualization resources including a physical server generated by a vnf (70) to execute a communication process, and the system includes a vnfm (30) for managing the vnf (70), a vim (40) for managing the virtualization resources of the nfvi (60), an orchestrator (20) for managing all the virtualization resources of the nfvi (60), wherein the vnfm (30) includes a retention section (31) configured to retain detailed information for implementing the vnf (70) and a virtual server generation request section (32) configured to request the vim (40) to generate the vnf (70) using the detailed information.. ... Ntt Docomo Inc

10/27/16 / #20160316469

User terminal, base station and radio communication method

An uplink transmission is carried out adequately even when ca is executed by employing different duplex modes between multiple cells. A user terminal communicates with an fdd cell and a tdd cell that employ carrier aggregation, receives dl signals transmitted from each cell, detects the dl signals received, makes retransmission control decisions, and allocates and feeds back delivery acknowledgement signals in response to each dl signal in a predetermined ul subframe. ... Ntt Docomo Inc

10/06/16 / #20160295617

Mobile communication method

An object is to realize “2dl, 1ul” “inter-enb ca”. A mobile communication method according to the present invention includes, a radio base station (menb) transmitting, when a bearer #1 has been set between a mobile station (ue) and the radio base station (menb), to the mobile station (ue) an information element “drb-toaddmod_senb” or “drb-toaddmod” that instructs to add a bearer #2 between a radio base station (senb) and to modify the settings of the bearer #1; and the mobile station (ue) modifying, according to the information element “drb-toaddmod_senb” or “drb-toaddmod”, the settings of the bearer #1, and adding the bearer #2 to receive a downlink signal via the bearer #1 and the bearer #2 and transmit an uplink signal via either the bearer #1 or the bearer #2.. ... Ntt Docomo Inc

10/06/16 / #20160294595

Radio base station, user terminal and radio communication method

The present invention is designed so that, in a radio communication system in which inter-terminal communication is carried out, the impact of inter-symbol interference due to the delay of inter-terminal discovery signals is reduced. The radio communication method of the present invention is used in a radio communication system in which each user terminal transmits the inter-terminal discovery signal in a transmission duration of a predetermined period. ... Ntt Docomo Inc

10/06/16 / #20160292451

Secure text retrieval

Methods and systems described herein may perform a word-level encryption and a sentence-level encryption of one or more documents. The word-level encryption and the sentence-level encryption may be performed with an encryption key generated by a client device. ... Ntt Docomo Inc

10/06/16 / #20160291842

Information processing device and information processing method

An information processing device includes a touch panel display that displays an object, a contact state detection unit that detects a state of proximity or contact of a finger on the touch panel display, a coordinate detection unit that detects proximity position coordinates on a plane of the touch panel display when the state of proximity of the finger on the touch panel display is detected by the contact state detection unit, and an object selection unit that calculates a direction of movement and a speed of movement of the proximity position coordinates in a plane direction of the touch panel display based on the proximity position coordinates and selects the object displayed at a position corresponding to the direction of movement and the speed of movement.. . ... Ntt Docomo Inc

10/06/16 / #20160291720

Terminal device and operation lock release method

A mobile terminal device 1 includes a touch panel display that displays an image and receives an input operation of information by a user's finger, an operation lock control unit that controls stop of the display of an image and the receipt of an input operation on the touch panel display, and a coordinates and distance detection unit that detects proximity coordinates of the finger to the touch panel display and a level of a proximity distance in the proximity coordinates, and the operation lock control unit performs control to release the stop when a combination of the proximity coordinates and the level of the proximity distance is approximate to prestored pattern information.. . ... Ntt Docomo Inc

09/29/16 / #20160286467

User terminal, radio base station and radio communication method

The present invention provides a radio communication method suitable for a radio communication system in which a plurality of small cells are located densely within a macro cell. The radio communication method of the present invention includes: measuring, in a user terminal (ue), radio quality in the small cells; and when a reporting condition is met, transmitting, in the user terminal, a measurement report including a measurement result. ... Ntt Docomo Inc

09/29/16 / #20160285569

Radio base station, user terminal and radio communication method

The present invention is designed to adequately measure the received quality of small cells on the user terminal side. A radio base station communicates with a user terminal by using a plurality of carriers into which a communication band is divided, and has a generating section that generates reference signals for allowing the user terminal to measure received quality, and an allocation section that controls the allocation of the reference signals, and, when one of the plurality of carriers is made subject to non-transmission, the allocation section configures a zero-power rs in a predetermined resource location of a specific carrier.. ... Ntt Docomo Inc

09/29/16 / #20160283054

Map information display device, map information display method, and map information display program

A map information display device includes a touch panel that displays map information and receives a user's touch operation, a touch position detection unit that detects a touch position on the touch panel, a building determination unit that determines whether there is a building whose inside information is displayable in the map information displayed on the touch panel, and a floor selection menu display processing unit that displays a floor selection menu having selection items corresponding to displayable floors in close proximity to the touch position on the touch panel when the building determination unit determines that there is a building whose inside information is displayable.. . ... Ntt Docomo Inc

09/22/16 / #20160278149

Communication apparatus, and configuration control method

A communication apparatus configured to perform communication by radio with another communication apparatus based on a setting by configuration information, including: a storage unit configured to hold default configuration information; a transmission unit configured to transmit default configuration information held in the storage unit to the other communication apparatus; a reception unit configured to receive default configuration information from the other communication apparatus; and a control unit configured to perform setting for performing communication by radio with the other communication apparatus by the default configuration information.. . ... Ntt Docomo Inc

09/22/16 / #20160278130

Mobile station and mobile communication system

To perform an appropriate transmission power control, when a plurality of rach procedures simultaneously start, a mobile station ue according to the present invention includes a controlling unit 13 that performs, in “inter-enb ca”, when a plurality of rach procedures are started, a prioritized control based on a predetermined rule on a transmission power control in each of the plurality of rach procedures.. . ... Ntt Docomo Inc

09/22/16 / #20160278056

Radio base station apparatus, mobile terminal apparatus, radio communication system and radio communication method

The present invention is designed to provide a radio base station apparatus, a mobile terminal apparatus, a radio communication system and a radio communication method which can cope with an increased number of users. A radio base station apparatus is provided with: a signal generating section that generates a first downlink control signal and a second downlink control signal for a mobile terminal apparatus; a first multiplexing section that multiplexes the first downlink control signal on a control region up to a predetermined number of symbols from the top of a subframe; a second multiplexing section that frequency-division-multiplexes the second downlink control signal on radio resources from the next symbol in the control region to the last symbol of the subframe; and a transmission section that transmits the first downlink control signal multiplexed on the control region and the second downlink control signal multiplexed on the radio resources.. ... Ntt Docomo Inc

09/22/16 / #20160278021

User terminal, radio base station and radio communication method

The present invention is designed to allow adequate communication even when a plurality of cells employ downlink transmission power control. A user terminal communicates with a radio base station that executes downlink transmission power control, and includes a receiving section that receives a first reference signal which is transmitted with fixed transmission power, and a second reference signal to which the downlink transmission power control is applied, a measurement section that measures the received power of the first reference signal and the second reference signal, and a transmission section that feeds back information related to the received power of the first reference signal and the second reference signal as a measurement report.. ... Ntt Docomo Inc

09/22/16 / #20160278004

Macro-cell assisted small cell discovery and resource activation

A method is described for controlling a small cell base station in a wireless communication system having a plurality of small cell base stations controlled by a macro base station. The method includes taking, by a small cell base station, a measurement for obtaining information describing a vicinity around the small cell base station and reporting the information from the small cell base station to the macro base station.. ... Ntt Docomo Inc

09/22/16 / #20160277924

Mobile communication method

To protect a key (k_enb-int) and a key (k_enb-enc) that are used in a radio base station (menb), even when a malicious third party has stolen a key (k_senb) from a radio base station (senb). A mobile communication method according to the present invention includes, upon starting “inter-enb ca” configured such that downlink data is distributed to the radio base station (menb) and the radio base station (senb) by a serving gateway device (s-gw), generating, by the radio base station (menb), the key (k_senb) based on a key (kenb) and transmitting the key (ksenb) to the radio base station (senb), and generating, by the radio base station (senb), a key (k_senb-enc) and a key (k senb-int) used for communication with a mobile station (ue) in the “inter-enb ca”, based on the key (k_senb).. ... Ntt Docomo Inc

09/22/16 / #20160277913

Radio base station, user terminal and radio communication method

The present invention is designed to prevent producing inter-symbol interference against normal uplink communication in collision-type d2d discovery during inter-terminal direct communication. A radio base station can communicate with a user terminal that can execute inter-terminal direct communication, and has a control section that configures a d2d discovery resource area by allocating a type 2 discovery resource area immediately after a type 1 discovery resource area in a row, and a transmission section that transmits allocation information of the d2d discovery resource area.. ... Ntt Docomo Inc

09/22/16 / #20160275177

Knowledge engine for managing massive complex structured data

A system, a method, and a medium are provided to use freebase as a source of structured data to construct a knowledge database with resource description framework (rdf) triples and determine encoded entities responsive to structured queries.. . ... Ntt Docomo Inc

09/15/16 / #20160270084

Mobile communication method, mobile communication system, and radio base station

Object is to perform appropriate communication control even if a size of “ue-eutra-capability” is increased. A mobile communication method according to the present invention includes a mobile station (ue) notifying a radio base station (enb) of “ue-eutra-capability”, the radio base station (enb) deleting, when a size of the “ue-eutra-capability” exceeds a size that can be stored in the radio base station (enb) or a mobility management node (mme), a predetermined capability from the “ue-eutra-capability”, and the radio base station (enb) notifying the mobility management node (mme) of a capability deleted from the “ue-eutra-capability” or a remaining capability that is not deleted from the “ue-eutra-capability”.. ... Ntt Docomo Inc

09/15/16 / #20160270039

Micro base station, user terminal and radio communication method

The present invention is designed to reduce interference from a macro base station to a small transmission power node. The present invention is characterized in providing a micro base station which forms, in a macro cell where a macro base station transmits a signal to a macro terminal, a micro cell where the micro base station transmits a signal to a micro terminal under control with low power, and this micro base station generates a pdcch which includes downlink or uplink resource allocation information, and, in a non-transmission period in which the macro base station stops transmitting signals while leaving minimal quality measurement signals, shifts the transmission starting symbol of the pdcch to a position where the pdcch does not overlap the quality measurement signals.. ... Ntt Docomo Inc

09/15/16 / #20160270005

Method and apparatus for controlling power

The present disclosure provides a method for controlling a power, comprising: determining an average basic transmission power of all user equipments (ues) in a cell in each first resource; for each first resource, determining a ue group scheduled in the first resource and a first transmission power allocation factor corresponding to the ue group according to the average basic transmission power. The present disclosure also provides an apparatus for controlling a power. ... Ntt Docomo Inc

09/15/16 / #20160269940

Central control station, radio base station and radio communication control method

The present invention is designed to reduce the decrease of system performance when coordinated multi-point transmission is carried out to a user terminal. The central control station of the present invention provides a central control station that is connected with a plurality of radio base stations that carry out coordinated multi-point transmission to a user terminal, and this central control station has a reporting information generating section that generates, for each radio base station, information about radio resources allocated to other radio base stations that carry out coordinated multi-point transmission, and a reporting section that reports the information about the radio resources, generated in the reporting information generating section, to each radio base station.. ... Ntt Docomo Inc

09/15/16 / #20160269933

Method and apparatus for re-transmitting data

The present disclosure provides a method for re-transmitting data, wherein the method at a user equipment (ue) side comprises: receiving, by a ue, a re-transmitted data packet from a base station, determining whether to perform data combination according to a signal to interference-noise ratio (sinr) of a first-transmitted data packet and a sinr of the re-transmitted data packet; when it is determined to perform data combination, performing, by the ue, data combination for the re-transmitted data packet according to information buffered by the ue and detecting the re-transmitted data packet according to a result of performed data combination; or when it is determined not to perform data combination, detecting, by the ue, the re-transmitted data packet. The present disclosure also provides a method for re-transmitting data at a base station side and a ue for implementing the above method.. ... Ntt Docomo Inc

09/15/16 / #20160269206

Radio base station, user terminal and radio communication method

To actualize frequency synchronization with each of radio communication systems while suppressing increase in circuit scale of a user terminal in an environment in which the user terminal concurrently communicates with a plurality of radio communication systems with different frequencies, a radio base station of the present invention is a radio base station for forming a narrow-area cell to communicate with a user terminal in a radio communication system where the narrow-area cell is provided inside a wide-area cell, and has a carrier frequency synthesizer that generates a carrier frequency of the narrow-area cell based on a wide-area radio signal transmitted from a radio base station for forming the wide-area cell, and a sampling frequency synthesizer that generates a sampling frequency of a baseband signal of the narrow-area cell based on the wide-area radio signal.. . ... Ntt Docomo Inc

09/08/16 / #20160262175

Base station, mobile station and method for downlink scheduling

. . There are provided a base station, a mobile station and a method for downlink scheduling by the base station. The base station comprises a scheduling unit, configured to assign a downlink resource block and a number of streams, an antenna port, and a scrambling identity for the antenna port to a mobile station, wherein a combination of the number of streams, the antenna port and the scrambling identity determines a successive interference cancellation order of the mobile station in the downlink resource block; and a transmitting unit, configured to transmit downlink scheduling information to the mobile station, the downlink scheduling information including information indicating the downlink resource block and information indicating the number of streams, the antenna port and the scrambling identity.. ... Ntt Docomo Inc

09/08/16 / #20160262158

Radio base station, mobile station and method for determining transmitting power

Embodiments of the present disclosure provide a radio base station, a mobile station and a method for determining a transmitting power. A radio base station, according to an embodiment of the present disclosure, is connected with a plurality of mobile stations, wherein a first mobile station in the plurality of mobile stations can form at least one mobile station pair with other mobile stations. ... Ntt Docomo Inc

09/08/16 / #20160262142

Base station, user apparatus, resource assignment method, and resource determination method

A base station configured to communicate with a user apparatus having a function for performing device-to-device communication by radio, including: an information transmission unit configured to transmit mapping information, to the user apparatus, in which service identification information on device-to-device communication is associated with a service type; an information reception unit configured to receive, from the user apparatus, service identification information corresponding to a service type of the user apparatus; and a resource assignment process unit configured to determine resource assignment used for device-to-device communication for each service based on the service identification information received from the user apparatus, and to transmit information indicating the resource assignment to the user apparatus.. . ... Ntt Docomo Inc

09/08/16 / #20160262091

Base station, user terminal and radio communication method

The present invention is designed so that adequate radio communication is carried out even when discovery signals for existing user terminals and small cell discovery/measurement signals coexist. A base station forms a macro cell having a coverage area to include a small cell, and communicates with a user terminal that can connect with the small cell, and this base station has a commanding section that commands, with respect to a predetermined frequency, one or both of a first discovery process to use a synchronization signal transmitted from the small cell, and a second discovery process to use a discovery/measurement signal transmitted from the small cell, to the user terminal, and a transmitting section that, when the commanding section commands the second discovery process, transmits information about the parameters of the discovery/measurement signal to the user terminal.. ... Ntt Docomo Inc

09/08/16 / #20160262046

Mobile station

A mobile station ue enables scheduling with the congestion status of each component carrier taken into consideration when performing inter-enb ca using a cell under a radio base station enb#1 and a cell under a radio base station enb#2. The mobile station ue includes a transmitter 12 configured to transmit the congestion status in the radio base station enb#2 to the radio base station enb#1.. ... Ntt Docomo Inc

09/08/16 / #20160261324

Method for optimizing rank of channel matrix, wireless base and mobile station

Embodiments of present invention provide a method for optimizing the rank of channel matrix, a wireless base and a mobile station. The method for optimizing the rank of channel matrix according to an embodiment of the present invention is applied to a wireless base to which multiple mobile stations are connected. ... Ntt Docomo Inc

09/01/16 / #20160255672

Mobile communication method, mobile station, and radio base station

An overhead for signaling in starting “bearer split” in “inter-enb ca” is reduced. A mobile communication method according to the present invention includes the steps of: transmitting, a first radio base station enb #1, an identifier of a radio base station enb #2 and “config copy indication”, to a mobile station ue, “config copy indication” instructing the mobile station ue to replicate “configuration” of a bearer #1, when the radio base station enb #1 in a state where the bearer #1 is established with the mobile station ue determines to establish a bearer #2 between the mobile station ue and the radio base station enb #2; and establishing, by the mobile station ue, the bearer #2 having the same “configuration” with “configuration” of the bearer #1 between the radio base station enb #2 and the mobile station ue in accordance with the identifier of the radio base station enb #2 and “config copy indication”.. ... Ntt Docomo Inc

09/01/16 / #20160255659

Communication apparatus, and layer 2 state control method

A communication apparatus including a function configured to perform data transmission by multicasting to a plurality of apparatuses by radio communication, including: a request reception unit configured to receive a join request from an apparatus that desires multicast data reception from the communication apparatus; a match control unit configured to perform control for matching values of a state variable of layer 2 in the radio communication between the communication apparatus and the apparatus that transmits the join request in response to receiving the join request by the request reception unit.. . ... Ntt Docomo Inc

09/01/16 / #20160255595

Mobile communication system

Transmission power control on a mobile station (ue) is appropriately performed when “inter-enb ca” is performed by using cells under control of plural radio base stations (enb). In a mobile communication system according to the present invention, a specific radio base station (enb#1) among plural radio base stations (enb#1, enb#2) performs scheduling control and transmission power control on a mobile station (ue) in all the cells (#1, #2a to #2c) under the control of the plural radio base stations (enb#1, enb#2).. ... Ntt Docomo Inc

09/01/16 / #20160255583

Radio base station, user terminal and radio communication method

The present invention is designed to optimize the operation for starting data communication when traffic is produced on the base station side in dual connectivity a structure is provided in which, when a user terminal (20) is in drx mode in a first carrier that is used in a secondary base station (12), a master base station (11) communicates with the user terminal by using a second carrier, and, when traffic is produced in the subject station or in the secondary base station, transmits command information for allowing the user terminal to transition from drx mode to non-drx mode, to the user terminal.. . ... Ntt Docomo Inc

09/01/16 / #20160255569

User terminal, radio base station and radio communication method

The present invention is designed so that adequate mutual detection is made possible in non-collision-type d2d discovery during inter-terminal direct communication. A user terminal can execute inter-terminal direct communication, and has a receiving section that receives initial allocation location information of a resource for transmitting a discovery signal for use in inter-terminal direct communication, and a control section that switches the location of the resource to transmit the discovery signal, per period, in accordance with a pre-rule.. ... Ntt Docomo Inc

09/01/16 / #20160255552

Mobile station, reconnection request method, base station, and reconnection request processing method

A mobile station for performing communication using component carriers belonging to different base stations includes a reconnection determination unit configured to determine a trigger to initiate a reconnection procedure; a reconnection request unit configured to generate a reconnection request using at least one of information about a primary cell and information about a secondary cell; and a transmission unit configured to transmit the reconnection request.. . ... Ntt Docomo Inc

09/01/16 / #20160255537

Mobile communication system and mobile device

A mobile communication system includes a first base station, a second base station, and a mobile device, wherein when uplink bearer splitting is arranged between the first base station, second base station, and the mobile device at a prescribed splitting ratio, and when the amount of data accumulated in a buffer of the mobile device does not exceed a threshold level, the mobile device transmits a buffer status report to either the first base station or the second base station even if the uplink bearer splitting is arranged, and when the amount of data accumulated in the buffer exceeds the threshold level, the mobile device divides the amount of data accumulated in the buffer at the splitting ratio and transmits the buffer status reports to the first base station and the second base station according to the divided amounts of data accumulation.. . ... Ntt Docomo Inc

09/01/16 / #20160254947

Mobile station and radio base station

The present disclosure prevents the occurrence of interference in an uplink in a case of adding a “ul scell” while ca is being performed using a pcell and a “dl scell.” a mobile station ue according to the present invention is configured such that, in a case where the mobile station ue adds a “ul scell” while performing ca by using a pcell and a “dl scell”, the mobile station ue suspends signal transmission using the “ul scell” for a predetermined length of time even if the “dl scell” is in an active state.. . ... Ntt Docomo Inc

09/01/16 / #20160254888

Radio communication method, radio communication system, radio base station and user terminal

A radio communication system including a plurality of radio base stations and a user terminal that is capable of coordinated multiple point transmission with the plurality of radio base stations is provided, and, in this radio communication system, a radio base station has a generating section that generates parameter information related to downlink signals, a control information generating section that generates downlink control information that includes an indicator to represent specific parameter information, a control section that controls whether or not to configure a bit field for the indicator of the parameter information in the downlink control information, and a transmission section that transmits information as to whether or not the bit field for the indicator of the parameter information is configured, to the user terminal, by higher layer signaling.. . ... Ntt Docomo Inc

09/01/16 / #20160254887

Mobile station

To perform “inter-enb ca” without complicating the implementation of a radio base station menb. A mobile station ue of the present invention includes a controlling unit 13 configured to, when in “rrc_connected state” in pcell that is under the control of the radio base station menb, and when scell that is under the control of a radio base station senb has been set, autonomously activate the scell.. ... Ntt Docomo Inc

08/25/16 / #20160249401

Ip multimedia subsystem, proxy session control apparatus, and communication control method

A p-cscf (310) includes a terminating call processing unit (311) which receives sip invite from an s-cscf. The sip invite includes an identifier of ue, and is relayed in response to acceptance of a terminating call to the ue. ... Ntt Docomo Inc

08/25/16 / #20160249389

Mobile communication system

An object of the present invention is to appropriately set an srb0 to an srb2 when “inter-enb ca” is performed. In a mobile communication system of the present invention, the srb0, the srb1, and the srb2 are configured to be established between a mobile station ue and a radio base station menb when the “inter-enb ca” is performed, and a radio base station senb is configured to send the mobile station ue “srb-toaddmod” when the radio base station senb is added, to establish an srb1 and an srb2 between the mobile station ue and the radio base station senb with the same setting contents as those of the srb1 and the srb2 established between the mobile station ue and the radio base station menb.. ... Ntt Docomo Inc

08/25/16 / #20160249362

Mobile communication system

An object is to appropriately perform transmission power control on a mobile station (ue) when performing “inter-enb ca” by using cells under the control of plural radio base stations (enb). In a mobile communication system according to the present invention, each of plural radio base stations (enb#1, enb#2) reduces, upon detecting that the mobile station (ue) is performing transmission at a maximum transmission power (pcmax, c), by a predetermined amount a transmission power of the mobile station (ue) in a cell (#1/#2a to #2c) under the control thereof and notifies other radio base station (enb) of the predetermined amount.. ... Ntt Docomo Inc

08/25/16 / #20160249345

User terminal, base station and transmission control method

The present invention is designed so that uplink transmission is carried out adequately even when ca to apply different duplex modes between multiple cells is executed. A user terminal communicates with an fdd cell and a tdd cell by employing carrier aggregation, and has a receiving section that receives dl signals transmitted from each cell, a transmission control section that allocates and transmits delivery acknowledgement signals in response to the received dl signals, channel quality information or scheduling requests in predetermined ul subframes, and, when a ul subframe is configured in both the fdd cell and the tdd cell, the transmission control section transmits a delivery acknowledgement signal in one ul subframe or both ul subframes, and controls whether or not to transmit channel quality information or a scheduling request having an overlapping transmission timing with the delivery acknowledgement signal.. ... Ntt Docomo Inc

08/25/16 / #20160249232

User equipment and method

Some techniques for preventing delay of updating a pdcp reception window in user equipment due to packet discarding are provided. One aspect of the present invention relates to user equipment comprising: a transmission and reception unit configured to transmit and receive a packet to/from a base station; a pdcp layer processing unit configured to determine for a pdcp (packet data convergence protocol) packet received from the base station whether a sequence number of the pdcp packet is within a reception window and perform a pdcp layer operation on the pdcp packet having the sequence number falling within the reception window; and a reception window updating determination unit configured to determine whether the packet received from the base station is a predefined updating trigger packet for causing the reception window to be updated and if the received packet is the updating trigger packet, cause the pdcp layer processing unit to update the reception window.. ... Ntt Docomo Inc

08/25/16 / #20160248554

Mobile communication system

An object is to increase the probability to transmit an rlc-status-report when “distributed rlcs” has been applied. In the mobile communication system according to the present invention, when “inter-enb ca” is being performed, a radio base station menb transmits to a mobile station ue all rlc-status-report corresponding to an upbound data signal received from the mobile station ue.. ... Ntt Docomo Inc

08/25/16 / #20160248485

Radio apparatus, radio control apparatus and communication control method

To reduce a bandwidth required for an optical transmission path (30) in a base station system including an rau (21) for performing mimo transmission using a plurality of antenna elements and a bbu (11), in a communication control method of the present invention, the bbu (11) transmits antenna weight coefficient information indicative of antenna weight coefficients of a plurality of antenna elements (205) and a transmission signal, and the rau (21) multiplies the transmission signal from the bbu (11) by each of the antenna weight coefficients to generate weighted signals of the plurality of antenna elements (205), and transmits the weighted signals from the plurality of antenna elements (205).. . ... Ntt Docomo Inc

08/18/16 / #20160242234

User equipment, mobile communication system and method

One aspect of the present invention relates to user equipment supporting an ims function, comprising: an application layer configured to provide a user interface for a user to set on or off the ims function; a sip layer configured to enable or disable transmission of a sip signal to a resident network corresponding to user's setting on or off the ims function in the user interface; and a modem layer configured to change an ims related capability of the user equipment related to the ims function corresponding to user's setting on or off the ims function in the user interface and communicate with the resident network based on the changed capability.. . ... Ntt Docomo Inc

08/18/16 / #20160242207

Radio base station, user terminal and radio communication method

The present invention is designed so that communication overhead pertaining to control signals is reduced in a communication system in which the bandwidth of a physical downlink shared channel is narrower than the system bandwidth. The radio base station of the present invention has a resource allocation section that allocates a physical downlink shared channel to a predetermined narrow band in a downlink system bandwidth, for a user terminal, and a downlink control information generating section that generates downlink control information to report to the user terminal, and the downlink control information generating section determines the size of a field pertaining to resource allocation information, included in downlink control information related to the physical downlink shared channel, based on the narrow band where the physical downlink shared channel is allocated.. ... Ntt Docomo Inc

08/18/16 / #20160242158

User terminal, base station and radio communication method

The present invention is designed to carry out uplink transmission adequately even when ca is executed by applying different duplex modes between multiple cells. A user terminal communicates with an fdd cell and a tdd cell that employ carrier aggregation, and has a receiving section that receives dl signals transmitted from each cell, and a feedback control section that allocates and feeds back delivery acknowledgement signals in response to the dl signals in a predetermined ul subframe, and, regardless of which cell is configured as a primary cell, the feedback control section, when transmitting only a delivery acknowledgement signal in response to the dl signal of one cell, transmits the delivery acknowledgement signal from the one cell by using a pucch resource that is determined from a downlink control channel resource of the dl signal, and, when transmitting delivery acknowledgement signals in response to the dl signals of both cells, transmits the delivery acknowledgement signals by using a pucch resource of one or both of the cells.. ... Ntt Docomo Inc

08/18/16 / #20160242127

User terminal and radio communication method

The present invention is designed to enable adequate transmission power control when inter-base station ca is employed. When inter-base station ca is employed, radio base stations detect when a user terminal's transmission power reaches the maximum transmission power, and execute control to cancel this. ... Ntt Docomo Inc

08/18/16 / #20160242123

Base station, user terminal and radio communication control method

The present invention is designed to adequately control small cells (small base stations) on/off in a structure where small cells and macro cells are arranged to overlap each other. A base station forms a small cell that is arranged to overlap a macro cell and applies an on state, a dtx state and an off state in a switching manner, and this base station has a detection section that detects a ul signal transmitted from a user terminal, a control section that controls the transition from the off state to the dtx state based on the detection of the ul signal, and a transmission section that transmits a detection/measurement signal in the dtx state, and the control section controls the transition from the dtx state to the on state based on information that is reported depending on the result of a measurement report from the user terminal having received the detection/measurement signal.. ... Ntt Docomo Inc

08/18/16 / #20160242106

Mobile station, mobile communication system, and network device

An object is to provide a mobile station, a mobile communication system, and a network device that can realize more appropriate call origination control per service as intended by an operator. An mmtel function unit (120) of a ue (100), based on ssac-barringformmtel-voice, upon determining that call origination of a volte call is possible, transmits bearer request to an nas function unit (170). ... Ntt Docomo Inc

08/18/16 / #20160242062

Small base station, user terminal and radio communication method

The present invention is designed so that a small cell detection/measurement signal is introduced without making an impact on existing systems. Where a small cell (s) covered by a small base station (10) is placed within a macro cell (m) covered by a macro base station (20) and a user terminal (30) is present within the small cell, the small base station generates a detection/measurement signal for a new detection process, which is different from an existing small cell detection process using synchronization signals, and maps the detection/measurement signal to avoid the synchronization signals and transmits the detection/measurement signal to the user terminal, and the user terminal receives the detection/measurement signal from the small base station and detects the small cell.. ... Ntt Docomo Inc

08/18/16 / #20160242061

Radio base station, user terminal and communication control method

The present invention is designed so that, in a radio communication system in which a plurality of component carriers (ccs) are used in each small cell within a macro cell, the load of measurements, the amount of information to report and so on in user terminals are reduced. The macro base station of the present invention transmits, to a user terminal, measurement indication information that includes a measurement indication for the received power of a measurement signal of a specific cc in each small cell, and receives, from the user terminal, a measurement report that includes the received power of the measurement signal of the specific cc. ... Ntt Docomo Inc

08/18/16 / #20160242060

Base station, mobile station, reference signal transmission method, and channel quality measurement method

A base station that communicates with a mobile station by using a plurality of antenna ports includes a mapping information communication unit configured to generate mapping of reference signals for measuring channel state information of the antenna ports by combining, within a resource block, mappings of reference signals for measuring the channel state information, the mappings being defined for a predetermined number or less of the antenna ports, and configured to communicate information indicating the generated mapping to the mobile station; a multiplexer configured to multiplex the reference signals for measuring the channel state information in one or more resource elements in the resource block in accordance with the generated mapping; and a transmitter configured to transmit the reference signals for measuring the channel state information.. . ... Ntt Docomo Inc

08/18/16 / #20160241624

Radio base station

When a packet in which a “static part” is changed is detected in a session established in a bearer, it is possible to prevent the packet from being discarded. A radio base station (enb) according to the present invention includes a communication control unit (13) configured to control communication via a session (an rtp session or an rtcp session) with a mobile station (ue). ... Ntt Docomo Inc

08/18/16 / #20160241377

User terminal, base station, and radio communication method

The present invention is designed so that uplink transmission is carried out adequately even when ca is executed by applying different duplex modes between multiple cells. A user terminal communicates with an fdd cell and a tdd cell by using carrier aggregation, and has a receiving section that receives dl signals transmitted from the cells, and a feedback control section that allocates and feeds back transmission acknowledgment signals in response to each dl signal in an uplink control channel of a predetermined cell, with reference to tables in which at least the states of transmission acknowledgment signals, pucch resources and qpsk symbol points are associated with each other, and, in this user terminal, the tables define different contents between the fdd cell and the tdd cell, and regardless of the cell where downlink control information is detected and the cell where downlink shared data is detected, the feedback control section uses the table that corresponds to the duplex mode of the predetermined cell where the transmission acknowledgment signals are transmitted.. ... Ntt Docomo Inc

08/18/16 / #20160241364

User terminal, radio base station and radio communication method

To suppress complication of transmission/reception processing even in the case where a user terminal supports a plurality of bandwidths, or the case where the terminal concurrently connects to a plurality of radio communication systems with different usage frequencies, a user terminal, which communicates with a radio base station for forming a wide-area cell and anther radio base station for forming a narrow-area cell in a radio communication system where the narrow-area cell is provided inside the wide-area cell, is provided with a reference signal generating section that generates a sampling frequency of a baseband signal of the wide-area cell as a reference signal, a frequency adjusting section that converts a frequency of the reference signal by n/m times, and a baseband processing section that uses a frequency subjected to frequency conversion as a sampling frequency of a baseband signal of the narrow-area cell.. . ... Ntt Docomo Inc

08/18/16 / #20160241282

User apparatus and interference reduction process method

A user apparatus for use in a radio communication system, including: an interference reduction process unit configured to reduce, from a received signal received by the user apparatus, an interference signal that becomes interference to a desired signal so as to obtain the desired signal; an interference reduction process execution determination unit configured to measure reception quality of the interference signal, and to determine whether to regard the interference signal as a target of interference reduction processing based on the reception quality, wherein the interference reduction process execution determination unit determines whether to regard the interference signal as the target of interference reduction processing by comparing a first indicator value of the interference signal that is estimated from the reception quality with a second indicator value that is used for transmission of the interference signal.. . ... Ntt Docomo Inc

08/18/16 / #20160240202

Audio signal processing device, audio signal processing method, and audio signal processing program

An audio signal processing device comprises a discontinuity detector configured to determine an occurrence of a discontinuity from a sudden increase of an amplitude of decoded audio obtained by decoding the first audio packet which is received correctly after an occurrence of a packet loss, and a discontinuity corrector for correcting the discontinuity of the decoded audio.. . ... Ntt Docomo Inc

08/11/16 / #20160234865

Radio communication terminal, radio base station and radio communication method

The present invention is designed so that prach transmission is carried out taking coverage enhancement into account. A radio communication terminal employs coverage enhancement and has a transmitting section that transmits a random access preamble by using a radio resource that is stipulated for the radio communication terminal employing coverage enhancement, and, in this radio communication terminal, one or a combination of the time, the frequency band and the sequence of the radio resource that is stipulated for the radio communication terminal employing coverage enhancement is different from that of a radio resource that is stipulated for a radio communication terminal not employing coverage enhancement.. ... Ntt Docomo Inc

08/11/16 / #20160234004

User terminal, base station and radio communication method

The present invention is designed so that uplink transmission is carried out adequately even when ca to apply different duplex modes between multiple cells is executed. A user terminal communicates with an fdd cell and a tdd cell by employing carrier aggregation, and has a receiving section that receives dl signals transmitted from each cell, and a feedback control section that allocates delivery acknowledgement signals in response to the dl signals received, by allocating the delivery acknowledgment signals in a predetermined ul subframe, and, regardless of the cell that is configured as the primary cell, when ul subframes are configured in both the fdd cell and the tdd cell, the feedback control section feeds back the delivery acknowledgement signals by using a ul subframe of one or both of the cells, and, when a ul subframe is configured only in the fdd cell, the feedback control section feeds back the delivery acknowledgement signals by using the ul subframe of the fdd cell.. ... Ntt Docomo Inc

08/11/16 / #20160233947

Radio communication system, radio mobile station and radio base station

To improve system performance for mobile communications (group mobility) in a plurality of terminals existing inside the same moving object, a radio communication system of the present invention is a radio communication system for mobile communications in a plurality of user terminals existing in a moving object, and has a radio base station for forming a cell on a moving path of the moving object, and a radio mobile station installed in the moving object to relay communications between the plurality of user terminals and the radio base station. By this means, by offloading communications according to user terminals inside the moving object by the dedicated system for group mobility, it is possible to reduce the load on the existing radio communication system, and it is possible to improve system performance of the entire radio communication system.. ... Ntt Docomo Inc

08/04/16 / #20160227501

Synchronization method, mobile station apparatus and base station apparatus

The present invention is designed to allow a communication system employing massive-mimo to optimize its performance. A mobile station apparatus transmits a synchronization signal by controlling the transmission direction of the transmitting beam for the synchronization signal by means of beamforming using a plurality of antenna elements, and has a synchronization signal processing section (62) that generates the synchronization signal including identification information of the mobile station apparatus, and changes the beamforming weight for the synchronization signal at predetermined time intervals, and a transmitting section (63) that transmits the synchronization signals generated in accordance with each beamforming weight on the uplink.. ... Ntt Docomo Inc

08/04/16 / #20160227492

User terminal and radio communication method

The present invention is designed to enable adequate transmission power control when inter-base station ca is employed. The present invention is designed so that, when inter-base station ca is employed and the transmission power of a user terminal reaches the maximum transmission power, the user terminal executes transmission power control by carrying out power scaling autonomously. ... Ntt Docomo Inc

08/04/16 / #20160227457

Mobile communication system, network node, and mobile communication method

The invention provides a mobile communication system, a network node, and a mobile communication method, which can cause user equipment of a particular type to attach to a dedicated network regardless of whether or not the user equipment supports a low access priority indicator (lapi). An mme (60) acquires subscriber information on ue (10) from an hss (70) based on an attachment request from the ue (10) forwarded by an enb (50) the subscriber information including availability for the ue (10) to use the dedicated network, and sends the enb (50) a selection instruction to select the dedicated network based on the acquired subscriber information. ... Ntt Docomo Inc

08/04/16 / #20160227399

Mobile station and radio base station

Even if “ue category” is notified of only in an uplink (or a downlink), a radio base station enb can suitably perform a communication control on a mobile station ue in the downlink (or the uplink) for which “ue category” is not notified of. In the mobile station ue according to the present invention, when the mobile station ue does not support “ue category for release-12” in the uplink, a transmitting unit 12 does not notify of “ue category for release-12” corresponding to the uplink, and when the mobile station ue does not support “ue category for release-12” in the downlink, the transmitting unit 12 does not notify of “ue category for release-12” corresponding to the downlink.. ... Ntt Docomo Inc

08/04/16 / #20160227391

Mobile communication system, mobile station, call control device, and mobile communication method

The invention provides a mobile communication system, a mobile station, a call control device, and a mobile communication method that are capable of allowing an emergency call, even to which a prefix indicating how to treat the emergency call is added, to break through access control, and applying priority control to the emergency call, as in the case of a normal emergency call without the addition of the prefix. Ue (100) separates acquired calling number information into a prefix and a calling number, and sends an msc (210) an emergency setup which includes the prefix and an emergency category linked with the calling number. ... Ntt Docomo Inc

08/04/16 / #20160225064

Shopping support device and shopping support method

A shopping support device is a wearable device including an imaging unit. The shopping support device includes a storage unit that stores a shopping list including any one or more pieces of information out of shop information relating to a shop for shopping and commodity information relating to a commodity to be purchased, a recognition unit that performs image recognition on a vicinity image which is picked up by the imaging unit, a determination unit that determines whether a target indicated by the information is present in the vicinity image, on the basis of an image recognition result and the information included in the shopping list stored by the storage unit, and a notification unit that notifies the user of the presence of the target determined to be present by the determination unit.. ... Ntt Docomo Inc

07/28/16 / #20160219594

Mobile communication method and radio base station

In order to solve problems with “distributed rlcs” and “independent rlcs,” a mobile communication method according to this embodiment includes: a step a of causing a radio base station enb#1 to generate a pdcp-pdu addressed to a mobile station ue; a step b of causing the radio base station enb#1 to associate the generated pdcp-pdu and an rlc-sn with each other and transmit the pdcp-pdu and the rlc-sn to a radio base station enb#2; a step c of causing the radio base station enb#2 to generate an rlc-pdu addressed to the mobile station ue by using the received pdcp-pdu and rlc-sn; and a step d of causing the radio base station enb#2 to transmit the generated rlc-pdu to the mobile station ue.. . ... Ntt Docomo Inc

07/28/16 / #20160219565

Mobile communication system and radio base station

Embodiments disclosed herein at directed to appropriately conducting “discard control” while “inter-enb ca” is performed. In a mobile communication system of the invention, a radio base station (menb) is configured to transfer a pdcp-pdu transmitted by a gateway device (s-gw) to either a mobile station (ue) or a radio base station (senb). ... Ntt Docomo Inc

07/28/16 / #20160219529

Radio base station, user terminal and transmission power control method

The present invention is designed to enable uplink signal transmission power control that is suitable when non-orthogonal multiple access (noma) is used on the uplink. The radio base station of the present invention has a decision section that decides whether or not to non-orthogonal-multiplex uplink signals of a plurality of user terminals, a transmission section that transmits, to a user terminal, switching information to command a switch to one of a first transmission power control method, which is used when the uplink signals are non-orthogonal-multiplexed, and a second transmission power control method, which is used when the uplink signals are not non-orthogonal-multiplexed, based on the decision in the decision section, and transmission power determining information, which is used to determine transmission power of the uplink signal, and a receiving section that receives the uplink signal with transmission power that is determined based on the switching information and the transmission power determining information.. ... Ntt Docomo Inc

07/28/16 / #20160219466

Mobile communication method and radio base station

In inter-enb handover with “full configuration”, ul-pdcp-pdus are handled appropriately. A mobile communication method according to the present invention includes, in inter-enb handover of a mobile station ue from a radio base station enb#1 to a radio base station enb#2, the step of causing the radio base station enb#1 to discard all the ul-pdcp-pdus having been successfully received, if the radio base station enb#2 instructs the mobile station ue to once delete all the configuration set between the mobile station ue and the radio base station enb#1.. ... Ntt Docomo Inc

07/28/16 / #20160219453

User terminal, radio base station and inter-frequency measurement method

The present invention is designed to reduce the load of inter-frequency measurements in user terminals in a radio communication system in which a plurality of ccs are used in each small cell within a macro cell. The inter-frequency measurement method of the present invention includes the steps of, from a radio base station forming a macro cell to a user terminal, transmitting the transmission timing information of a detection signal in a small cell, and the a timing shift value for detection signals of the plurality of ccs that transmitted with shifted timings in the small cell, and, in the user terminal, measuring the plurality of ccs in a measurement gap based on the transmission timing information and the timing shift value.. ... Ntt Docomo Inc

07/28/16 / #20160218853

User terminal, base station and radio communication method

The present invention is designed to enable appropriate transmission and reception in user terminals even when ca is executed by applying different duplex modes between multiple cells. A user terminal communicates with an fdd cell and a tdd cell by using carrier aggregation, and has a transmitting/receiving section that receives dl signals transmitted from each cell and transmits ul signals to each cell, and a report control section that controls reporting of capability information regarding simultaneous transmission and reception of the dl signals and ul signals in the transmitting/receiving section. ... Ntt Docomo Inc

07/28/16 / #20160217059

Debug device, debug method, and debug program

A debug device to more accurately compute current consumption or a current consumption quantity from a computer program to be executed in a mobile terminal when a computer program is debugged. The mobile terminal includes a terminal log information acquisition unit configured to acquire terminal log information indicating an operating state of hardware constituting the mobile terminal during debug execution and a current consumption computation unit configured to compute the current consumption or the current consumption quantity of the mobile terminal during debug execution on the basis of the terminal log information and computation information for computing the unique current consumption or the unique current consumption quantity from the operating state of the hardware which is pre-stored.. ... Ntt Docomo Inc

07/21/16 / #20160212746

Method and base station for mu-mimo transmission in wireless communication system

The present disclosure provides a method and base station for multiple user-multiple input multiple output (mu-mimo) transmission in a wireless communication system. The base station re-allocates frequency resources of a dmrs port which are allocated to n first data flows to m second data flows, wherein m is greater than n, and n first data flows may be used by n first ues or less than n first ues. ... Ntt Docomo Inc

07/21/16 / #20160212671

Radio base station

An object is to improve the throughput of a mobile station ue without affecting the coverage of a macrocell in a case where ca is introduced to a hetnet environment. A radio base station enb according to the present invention is configured to determine whether or not to change the connection destination of a mobile station ue from a small cell #1 to a small cell #2 while the mobile station ue is performing ca by using the macrocell and the small cell #1, based on at least one of the congestion status in each of the small cell #1 and the small cell #2 and the communication quality in each of the small cell #1 and the small cell #2.. ... Ntt Docomo Inc

07/21/16 / #20160212631

Synchronization signal transmitting method and base station apparatus

In order to make full use of the performance of a massive-mimo-applied communication system, provided is a base station apparatus for controlling a transmission direction of a transmission beam for a synchronization signal used in cell search by beamforming using a plurality of antenna elements. The base station apparatus has a synchronization signal processing section (62) that generates the synchronization signal including information to identify the transmission beam for the synchronization signal and changes a beamforming weight for the synchronization signal at every given time interval; and a transmission section (64) that transmits the synchronization signal generated with the beamforming weight in downlink.. ... Ntt Docomo Inc

07/21/16 / #20160212617

Subscriber profile transfer method, subscriber profile transfer system, and user equipment

An euicc 100 embedded in an ue 200 authenticates an autn transmitted from an hss 300, and calculates a transfer key tk by using a secret key k. The euicc 100 acquires a transfer token by decoding an enc token by using the transfer key tk, and acquires a new customer id by decoding an enc new id by using the transfer key tk. ... Ntt Docomo Inc

07/14/16 / #20160205699

Mobile station and mobile communication system

An adequate transmission rate is guaranteed in a case where “inter-node up aggregation” is being performed. In a mobile station according to the present invention, each of mac layer functions includes a cost management unit configured to manage a cost of an lch involved in “inter-node up aggregation”, a priority management unit configured to manage a priority of the lch, and a bearer management unit configured to allocate transmission resources to data for the lch based on the priority and the cost of the lch. ... Ntt Docomo Inc

07/14/16 / #20160205695

Radio base station, relay station and radio communication method

The present invention is designed to increase the capacity of backhaul links between radio base stations and relay stations. The present invention is designed so that a radio base station (bs) non-orthogonal-multiplexes downlink signals for a plurality of communication devices including at least one relay station, over the same radio resource, with different transmission power, and transmits the downlink signals to the plurality of communication devices with the different transmission power, and a relay station (rs) cancels interference by a downlink signal for another communication device, which is non-orthogonal-multiplexed in the radio base station, over the same radio resource, with the different transmission power, so as to receive a downlink signal for a lower communication device connected to the subject station, as a downlink signal for the subject station, and transmits the downlink signal to the lower communication device, using a radio resource that is different from the radio resource that is used in non-orthogonal-multiplexing in the radio base station.. ... Ntt Docomo Inc

07/14/16 / #20160205670

Radio communication apparatus, channel estimation method, and signal relay method

A radio communication apparatus in a tdd (time division duplex) system includes a notification unit configured to notify a destination radio communication apparatus of information about a signal to be relayed by the destination radio communication apparatus and a resource to be used by the destination radio communication apparatus to relay the signal; a transmission unit configured to transmit the signal to be relayed by the destination communication apparatus; a reception unit configured to receive the signal relayed by the destination communication apparatus; and a channel estimation unit configured to estimate a channel based on the signal relayed by the destination communication apparatus.. . ... Ntt Docomo Inc

07/14/16 / #20160205667

Radio base station, radio communication system and radio communication method

The present invention is designed so that a radio base station controls base station parameters dynamically, in accordance with changes in the surrounding propagation environment. The radio base station according to the present invention has a surrounding environment information acquiring section that acquires surrounding environment information, which is information about the environment in a service area, a propagation environment information extraction section that extracts propagation environment information, which is information about electric wave propagation, based on the surrounding environment information, and a base station parameter generating section that generates base station parameters, which are information about the control of electric waves to transmit and receive, based on the propagation environment information.. ... Ntt Docomo Inc

07/14/16 / #20160205636

Radio base station apparatus, and transmission power determination method

A radio base station apparatus including a function for determining a transmission power, including: a neighbor cell detection unit configured to detect a neighbor cell that interferes with a target cell that the radio base station apparatus can form; a received power measurement unit configured to measure a received power from the neighbor cell; an interference wave arrival direction estimation unit configured to estimate an arrival direction of interference wave from the neighbor cell; and a transmission power determination unit configured to weight the received power based on the arrival direction of the interference wave and a desired area direction, to determine an interference amount in the target cell based on a sum of weighted received powers, and to determine a transmission power using the interference amount.. . ... Ntt Docomo Inc

07/14/16 / #20160205603

Mobile communication method

In switching a radio base station (senb) from a radio base station (senb#1) to a radio base station (senb#2) in an “inter-node up aggregation”, the occurrence of transmission delay of downlink data to a mobile station (ue) is avoided. A mobile communication method according to the present invention includes: stopping, by the radio base station (senb#1), scheduling of downlink data to the mobile station (ue), and sending an “senb change command” to the mobile station (ue), when receiving an “senb change request ack” from the radio base station (senb#2); notifying, by the mobile station (ue), a radio base station (menb) of at least one of already received downlink data and unreceived downlink data; and resending, by the radio base station (menb), the mobile station the downlink data that is not received by the mobile station (ue) in response to the notification.. ... Ntt Docomo Inc

07/14/16 / #20160205602

Mobile communication method

In switching a radio base station (senb) from a radio base station (senb#1) to a radio base station (senb#2) in an “inter-node up aggregation”, forwarding of new downlink data destined for a mobile station (ue) from a radio base station (menb) to the radio base station (senb#2) is quickly started. A mobile communication method according to the present invention includes: sending, by the mobile station ue, the radio base station (menb) a “new data delivery request” that requests forwarding of new downlink data destined for the mobile station (ue) to the radio base station (senb#2) , in response to an “senb change command”; and forwarding, by the radio base station menb, the new downlink data destined for the mobile station (ue) to the radio base station (senb#2) , in response to the “new data delivery request”.. ... Ntt Docomo Inc

07/14/16 / #20160204920

Radio base station, user terminal and radio communication method

The present invention is designed to expand the coverage of reference signals in small cells that are arranged to overlap a macro cell, and, furthermore, reduce the interference between the small cells and improve the received quality of the reference signals in user terminals. The radio communication method of the present invention provides a radio communication method in a radio base station forming a small cell that is placed to overlap a macro cell, and includes the steps of generating a reference signal for measuring received quality, in a first transmission period in which beamforming is not executed, transmitting the reference signal in a narrower transmission bandwidth and with greater transmission power than in a second transmission period in which beamforming is executed, and allocating the reference signal to a band associated with information that is specific to each radio base station forming a small cell, and transmitting the reference signal.. ... Ntt Docomo Inc

07/14/16 / #20160198956

Exercise load determination method and exercise load determination device

An exercise load determination method and an exercise load determination device that can easily and accurately determine whether an exercise load is appropriate or not. An acquisition unit acquires first acetone concentration value being concentration of acetone released from a subject before exercise of the subject and second acetone concentration value being concentration of acetone released from the subject after a specified period of time from an end of the exercise by the subject, a determination unit calculates a comparison value between the first acetone concentration value and the second acetone concentration value, compares the comparison value with a preset threshold, and determines whether an exercise load of the exercise is appropriate for the subject, and an output unit outputs information based on a determination result by the determination unit.. ... Ntt Docomo Inc

07/07/16 / #20160198467

Mobile station and radio base station

Achieved is “inter-node up aggregation”. A mobile station ue according to the invention includes a mac layer function for a radio base station menb and a mac layer function for a radio base station senb. ... Ntt Docomo Inc

07/07/16 / #20160198452

User equipment and capability reporting method

The present disclosure relates to some techniques for controlling carrier aggregation properly in a radio communication system including a mixture of harmonic-supported user equipments and harmonic-unsupported user equipments. One aspect of the present invention relates to a user equipment having a carrier aggregation function, comprising: a communication control unit configured to control radio communication with a base station; a capability management unit configured to manage a requirement on transmission and reception characteristics supported by the user equipment for each combination of carrier aggregation frequency bands; and a capability reporting unit configured to report the requirement on the transmission and reception characteristics supported by the user equipment as a capability to the base station.. ... Ntt Docomo Inc

07/07/16 / #20160198449

User equipment, base station, information notification method, and resource allocation method

A user apparatus including a function configured to perform device-to-device communication by radio, including: a data storage unit configured to store identification information corresponding to the user apparatus; an identification information obtaining unit configured to receive, from another user apparatus, a discovery signal including identification information corresponding to the other user apparatus, and to obtain the identification information corresponding to the other user apparatus from the discovery signal; and a control signal transmission unit configured to transmit a control signal including the identification information corresponding to the other user apparatus to a base station.. . ... Ntt Docomo Inc

07/07/16 / #20160198448

Base station, user terminal and radio communication control method

The present invention is designed to adequately control small cells (small base stations) on/off in a structure where small cells and macro cells are arranged to overlap each other. A base station forms a macro cell, which is arranged to overlap a small cell, controls on/off of a small base station forming the small cell, and has a reporting section that reports, to the small base station, information related to a ul signal transmitted from a user terminal, and a control section that controls transmission of a dl signal from the small base station based on information that is reported from the small base station having detected the ul signal.. ... Ntt Docomo Inc

07/07/16 / #20160197709

Radio base station, user terminal and radio communication method

The present invention is designed so that, in a communication system to employ massive mimo, data signals to which beamforming is applied can be transmitted adequately. A radio base station transmits a data signal to a user terminal by applying beamforming using a plurality of antenna elements, and has a determining section that determines the type of a weight to apply to the data signal for beamforming, a generating section that generates a reference signal which the user terminal uses in channel estimation, a weight control section that controls weights to apply to transmitting signals, and a transmitting section that transmits the data signal and the reference signal, and the weight control section determines whether or not to apply a weight to the reference signal based on the type of the weight.. ... Ntt Docomo Inc

07/07/16 / #20160197412

Multi-antenna array system

A multi-antenna array system includes active antennas each of which includes an antenna element and an amplifier that includes a matching circuit, a failure detector, and a circuit controller. The failure detector detects a failure in each of the active antennas, and in a case where a failure is detected in any of the active antennas, the circuit controller performs control to change a matching condition of the matching circuit included in each of the active antennas not having a failure such that total output power of the multi-antenna array system is maintained.. ... Ntt Docomo Inc

06/16/16 / #20160174246

Radio base station and mobile station

Even in the case of satellite communications to which lte is applied, high transmission rates are achieved with avoidance of the occurrence of a delay. A radio base station enb according to the present invention includes a transmission unit 11 configured to transmit a scheduling signal for a downlink signal and the downlink signal to a mobile station ue. ... Ntt Docomo Inc

06/16/16 / #20160174230

Radio base station, user terminal and radio communication method

The present invention is designed to realize link adaptation that is optimal for future radio communication systems. A radio base station is configured to select user terminals from user groups that are determined based on the channel gain of each user terminal, determine a user set to non-orthogonal-multiplex over an arbitrary radio resource, with transmission power that is allocated to each user group on a fixed basis, and transmit downlink signals to the user terminals of the user set, with the transmission power that is allocated to each user group.. ... Ntt Docomo Inc

06/16/16 / #20160174190

Exchange, wireless network control device, wireless network device, and wireless communication network system

An rnc includes: a first call request reception unit configured to receive from an exchange a first call request to only an already located wireless cell; a presumably located wireless cell derivation unit configured to derive a presumably located wireless cell in which a target communication terminal device is presumably located; a first call making unit configured to make a call to the already located wireless cell and the presumably located wireless cell; a call response signal transmission unit configured to transmit a response signal to the call, to the exchange; a second call request reception unit configured to receive from the exchange a second call request to a wireless cell different from the already located wireless cell, in a case where the response signal to the first call request has not been transmitted; and a second call making unit configured to make the call to the different wireless cell.. . ... Ntt Docomo Inc

06/16/16 / #20160174169

Radio base station, user terminal and radio communication method

The present invention is designed to allow user terminals to detect small cells in the off state efficiently when the small cells are switched on and off dynamically. A radio base station that switches between a continuous transmission state and a discontinuous transmission state dynamically, has a power control section that executes power control so that the transmission power of a reference signal for cell detection that is transmitted in the discontinuous transmission state is lower than the transmission power of a reference signal that is transmitted in the continuous transmission state.. ... Ntt Docomo Inc

06/16/16 / #20160174166

Radio base station apparatus, and transmission power determination method

A radio base station apparatus including a function for determining a transmission power, including: a neighbor cell detection unit configured to detect a neighbor cell that interferes with a target cell that the radio base station apparatus can form; a received power measurement unit configured to measure, for each neighbor cell detected by the neighbor cell detection unit, a received power from the neighbor cell; and a transmission power determination unit configured to calculate, for each band part that overlaps with a transmission band of the radio base station apparatus in transmission bands of each neighbor cell, a sum of received powers for neighbor cells having transmission bands each including the band part, and to determine an interference amount in the target cell based on the sum of received powers so as to determine the transmission power by using the interference amount.. . ... Ntt Docomo Inc

06/16/16 / #20160174155

Radio base station, user terminal and discontinuous reception method

The present invention provides a discontinuous reception method in a radio communication system in which carrier aggregation is performed by aggregating a component carrier of a macro cell and a component carrier of a small cell. The discontinuous reception method has the steps of: classifying a radio bearer configured in a user terminal into an rb group 1 including a radio bearer associated with the component carrier of the macro cell or an rb group 2 including a radio bearer associated with the component carrier of the small cell; transmitting, to the user terminal, a drx set 1 to use in discontinuous reception of data via a radio bearer of the rb group 1 and a drx set 2 to use in discontinuous reception of data via a radio bearer of the rb group 2.. ... Ntt Docomo Inc

06/16/16 / #20160174056

User apparatus, base station, radio resource selection method, and radio resource notification method

A user apparatus configured to select a discovery resource from a predetermined radio resource, and to transmit a discovery signal using the discovery resource, including: means that receives, from a plurality of base stations, radio resource information indicating a radio resource by which a discovery signal can be transmitted; means that detects a common region of radio resources by which a discovery signal can be transmitted between the plurality of base stations based on a plurality of pieces of radio resource information received from the plurality of base stations; and means that selects a discovery resource from a radio resource of the common region, and transmits a discovery signal by using the discovery resource.. . ... Ntt Docomo Inc

06/16/16 / #20160174026

Radio communication system and location characteristic determination method

A radio communication system includes: a visit information storage unit that stores plural visit information elements each indicating information on a visit to a cell visited by a user equipment; an event detector that detects an event that occurs in the user equipment; a cell identifier detector that detects a cell identifier that indicates a cell visited by the user equipment; and a location characteristic determiner that determines a location characteristic of the cell indicated by the cell identifier based on one or more visit information elements corresponding to the cell. The location to characteristic determiner determines the location characteristic of a cell visited by the user equipment when the event detector detects a no-cell-change event other than a cell-change event that indicates a change in the cell identifier.. ... Ntt Docomo Inc

06/16/16 / #20160173263

Mobile terminal apparatus, base station apparatus and communication control method

To optimize operation of a mobile terminal apparatus when a half-duplex fdd scheme is applied, the mobile terminal apparatus performs radio communications with a base station apparatus by hd-fdd, and when transmission timing of an uplink signal and reception timing of a downlink signal overlaps each other, selectively performs transmission processing of the uplink signal and reception processing of the downlink signal, based on a priority relationship defined between the uplink signal and the downlink signal.. . ... Ntt Docomo Inc

06/16/16 / #20160173231

Base station, terminal device and radio communication system

A base station is configured to transmit control information to a terminal device in a radio communication system, wherein an error detection code that is masked by predetermined identification information is attached to the control information, the base station including a generator configured to generate, upon detecting that a length of first information that is to be masked by the predetermined identification information to generate the error detection code does not correspond to a length of the predetermined identification information, second information that corresponds to the length of the predetermined identification information; and an error detection code generator configured to generate, upon detecting that the second information is generated, the error detection code in which the second information is masked by the predetermined identification information.. . ... Ntt Docomo Inc

06/16/16 / #20160173217

User apparatus, base station, interference reducing method and interference reducing control information notification method

A user apparatus in a radio communication system including a plurality of base stations, including: a reception unit configured to receive, from a connecting base station, control information to be used for reducing an interference signal sent from an interference base station for the user apparatus; and an interference reducing unit configured to reduce the interference signal by using the control information to obtain a desired signal sent from the connecting base station, wherein the reception unit receives a part of the control information as a part of downlink control information that is transmitted by a downlink physical layer signaling channel from the connecting base station, and receives the other part of the control information by rrc signaling.. . ... Ntt Docomo Inc

06/16/16 / #20160173214

Mobile station and radio base station

In ca performed using three or more frequency bands, whether or not a mobile station ue is capable of performing an inter-frequency measurement without a gap is properly determined. The mobile station ue according to the invention includes a transmission unit 11 configured to transmit “ue capability” indicating a capability of the mobile station ue to a radio base station enb. ... Ntt Docomo Inc

06/16/16 / #20160173188

Mobile station

Even in the case of satellite communications to which lte is applied, a difference between reception timings of uplink singles transmitted from a plurality of mobile stations ue located in the same cell is kept within gi specified in lte. A mobile station ue#1 according to the present invention includes: an offset calculation unit 23 configured to calculate an offset δ from a transmission timing to be referenced, based on a distance lx between the mobile station ue#1 and a satellite 1 used in satellite communications, and a distance lref between the satellite 1 and a reference mobile station ue; and an rach functional unit 24 configured to adjust a transmission timing of a random access preamble based on the calculated offset δ.. ... Ntt Docomo Inc

06/09/16 / #20160165616

Base station, user apparatus and interference reduction method

A base station connected to a user apparatus in a radio communication system is provided. The base station includes a receiving unit configured to receive from an interference base station first control information which is used by the user apparatus for reducing an uplink interference signal from one or more cells formed by the interference base station or from another user apparatus, a generation unit configured to generate second control information based on one or more pieces of the first control information received from the interference base station, and a transmitting unit configured to transmit the second control information to the user apparatus by a downlink control signal.. ... Ntt Docomo Inc

06/09/16 / #20160165560

Radio base station, user terminal and radio communication method

A radio base station establishes radio synchronization by using a downlink signal transmitted from a radio base station of another cell, and has a synchronization information control section that, via an inter-base station interface, reports a synchronization information request to the radio base station of the other cell and also acquires synchronization information reported from the radio base station of the other cell, and an on/off control section that, based on the synchronization information acquired, determines the status of synchronization with a cell that belongs to a lower stratum than an own cell, and executes on/off control for the own cell, and the synchronization information which the synchronization information control section acquires from the radio base station of the other cell includes information representing the synchronization status and the synchronization stratum level of the radio base station of the other cell.. . ... Ntt Docomo Inc

06/09/16 / #20160165559

User apparatus, base station, discovery signal reception method and discovery signal transmission method

A user apparatus, for use in a radio communication system including a base station forming a cell, configured to receive a discovery signal of device-to-device communication, including: an information reception unit configured to receive, from a base station of a residing cell, a resource range in which a discovery signal can be transmitted in a neighbor cell; and a discovery signal reception unit configured to receive a discovery signal at a time position that is synchronized with the neighbor cell in response to receiving a synchronization signal that is synchronized with the neighbor cell within the resource range received by the information reception unit.. . ... Ntt Docomo Inc

06/09/16 / #20160165486

Mobile station and mobile communication system

The invention eliminates waste of resources attributed to transmission of a bsr in “inter-node up aggregation”. A mobile station (ue) of the invention includes a transmission unit (12) configured, when ca is performed by using a cc (#1) under a radio base station (enb#1) and a cc (#2) under a radio base station (enb#2), to send the radio base station (enb#1) a bsr (#1) notifying a buffer residence-volume in an eps bearer involved in the ca, and then to send the radio base station (enb#2) a bsr (#2) notifying a buffer residence-volume other than the buffer residence-volume notified to the radio base station (enb#1) out of a buffer residence-volume in the eps bearer.. ... Ntt Docomo Inc

06/09/16 / #20160165457

Radio communication system and antenna configuration determination method

In a radio communication system performing radio communications using multiple antenna ports, a radio base station apparatus transmits a reference signal from each of the antenna ports in multiple patterns corresponding to a plurality of antenna port configurations formed of single antenna elements or groups of antenna elements, and determines the antenna elements that form the respective antenna ports based upon feedback information supplied from a mobile device that has received the reference signal in the multiple patterns.. . ... Ntt Docomo Inc

06/02/16 / #20160157213

Radio base station, user terminal and radio communication method

In order to perform harq processing for downlink shared data efficiently even when control information for the downlink shared data allocated to a plurality of subframes is allocated to a particular subframe, the present invention provides a radio communication method for allocating control information for downlink shared data allocated to a plurality of subframes to a specific subframe and transmitting the control information to a user terminal. The control information is generated by including more than 3-bit bit information for specifying identification information of each harq process, the control information is mapped to the specific subframe, and the control information and the downlink shared data are transmitted to the user terminal.. ... Ntt Docomo Inc

06/02/16 / #20160157197

Radio base station, user terminal and radio communication method

The present invention is designed to establish synchronization properly even when synchronizing between different cells by means of a radio interface in an asynchronous nw. A radio base station establishes radio synchronization by using downlink signals transmitted from the radio base station of other cells, and has a synchronization information control section that, via an inter-base station interface, reports a synchronization information request to the radio base stations of other cells and also acquires synchronization information reported from the radio base stations of other cells, and a determining section that determines a radio base station to establish radio synchronization with, based on the synchronization information acquired, and the synchronization information which the synchronization information control section acquires from the radio base stations of other cells includes the synchronization status, the synchronization stratum levels, and information to represent the synchronization groups, of the radio base stations of other cells.. ... Ntt Docomo Inc

06/02/16 / #20160157052

User apparatus and area information notification method

A user apparatus includes processing modules that execute processing using basic area information, and an area information supply module that supplies basic area information to the processing modules. The area information supply module includes an event detection unit that detects an event, an area information acquisition unit that acquires basic area information in accordance with an event being detected, and an area information notification unit that notifies the processing modules of the basic area information. ... Ntt Docomo Inc

05/26/16 / #20160150495

Location information registration method and mobile communication terminal

Location information of a mobile communication terminal is registered promptly. When the mobile communication terminal receives a first location registration response signal, in which a predefined value indicative of a cause of rejecting the registration of the location information is set, the mobile communication terminal transmits a location registration request signal to a second mobile communication network when there is the second mobile communication network over which the mobile communication terminal can communicate, based on the predefined value. ... Ntt Docomo Inc

05/26/16 / #20160150476

Mobile station

Even equipped with “advanced receiver functionality”, a mobile station ue according to the present invention achieves appropriate battery saving. The mobile station ue according to the present invention includes: a determination unit 11 configured to determine whether or not there is a possibility of allocation of any of resource for uplink data and resource for downlink data to the mobile station ue; and a switch unit 12 configured to halt the “advanced receiver functionality” when the determination unit 11 determines that there is no possibility of the allocation.. ... Ntt Docomo Inc

05/19/16 / #20160143042

Radio base station, radio communication system and radio communication method

In order to avoid interference efficiently and control the amount of radio resources that are not used for interference avoidance, the present invention provides a radio base station connected to a neighbor radio base station via inter-radio base station interface. The radio base station has: a radio communication section that performs radio communication with a user terminal using a ul/dl configuration indicating a configuration of uplink and downlink subframes in a radio frame; an interference detecting section that measures and detects interference that the radio base station suffers from; and a selecting section that uses an interference detection result as a basis to determine which to apply to each subframe, between a resource allocation-unrestricted scheme and an inter-cell uplink/downlink orthogonalization scheme.. ... Ntt Docomo Inc

05/19/16 / #20160142924

Mobile station

A situation where the important configuration setting is delayed is avoided during execution of “inter-enb ca”. A mobile station ue according to the present invention includes: a priority management unit 13 configured to manage a priority of each radio base station, each cell or each rrc message; and an rrc message processing unit 12 configured to, when rrc messages are received from a radio base station enb#1 and a radio base station enb#2, process the rrc messages based on the priorities.. ... Ntt Docomo Inc

05/19/16 / #20160142870

Radio communication system and information identification method

A radio communication system has a base station that forms a cell identified by a cell identifier, a geographic information storage unit that stores a geographic information element indicating a geographic characteristic of a location at which a cell is formed, a cell visit detector that detects that a user equipment that was visiting a first cell and starts to visit a second cell differing from the first cell, a cell information obtainer that obtains a second cell identifier corresponding to the second cell when the cell visit detector detects the visit to the second cell, and a geographic information identifier that retrieves, based on the second cell identifier, a geographic information element of the second cell that corresponds to the second cell identifier from the geographic information storage unit.. . ... Ntt Docomo Inc

05/19/16 / #20160142195

Radio base station apparatus, mobile terminal apparatus and radio communication system

Provided are a radio base station apparatus, a mobile terminal apparatus and a radio communication method capable of taking other-cell interference mitigation measures even in consideration of inter-cell coordination like comp. The radio communication method according to the present invention is characterized by, in a radio base station apparatus, generating notification information including subframe information of a serving cell and subframe information of another cell; and transmitting the notification information to a mobile terminal apparatus connected to the serving cell as a connected cell; and in the mobile terminal apparatus, receiving the notification information including the subframe information of the connected cell and the subframe information of another cell; and measuring channel quality of the connected cell with use of the subframe information of the connected cell and measuring channel quality of another cell with use of the subframe information of another cell.. ... Ntt Docomo Inc

05/19/16 / #20160142194

Mobile station

A delay in transmission of “rrc connection reconfiguration complete” is avoided during execution of “inter-enb ca”. A mobile station ue according to the present invention includes a rrc message processing unit 12 configured to, when “rrc connection reconfiguration #1” is received from the radio base station enb#1 and thereafter “rrc connection reconfiguration #2” is received from the radio base station enb#2, perform processing for the “rrc connection reconfiguration #2” after completing transmission of “rrc connection reconfiguration complete” responding to the “rrc connection reconfiguration #1”.. ... Ntt Docomo Inc

05/19/16 / #20160142193

Radio base station, user terminal, radio communication method and radio communication system

The present invention is designed to realize non-orthogonal multiple access while reducing the decrease of throughput. A radio base station selects a predetermined decoding pattern, based on channel state information of a user terminal, from among a plurality of decoding patterns in which information regarding the order of decoding of the non-orthogonal multiple access signals and/or whether or not sic (successive interference cancellation) is applied is defined, and transmits information to represent the selected decoding pattern to the user terminal, and the user terminal receives the information to represent the decoding pattern, and cancels interference in accordance with the order of decoding and sic based on the decoding pattern that is shown in the received information.. ... Ntt Docomo Inc

05/19/16 / #20160142094

Method and apparatus for relative transceiver calibration for wireless communication systems

A method and apparatus is disclosed herein for relative calibration of transceivers in a wireless communication system. In one embodiment, the method comprises transmitting multiple pilots from units in the first group; receiving, in response to the multiple pilots, a first set of pilot observations at each unit in the second group; transmitting a single pilot simultaneously from at least two units in the second group; in response to the single pilot, receiving a second set of pilot observations at each unit in the first group; and using the first and second sets of pilot observations to calibrate each of at least two units in the second group based on a reference array of transceivers in the first group of transceivers.. ... Ntt Docomo Inc

05/12/16 / #20160135040

Control apparatus, control method, communication system and program

A control apparatus includes: a determination unit that determines whether identification information for identifying a mobile communication terminal in a second mobile communication network can be changed from first identification information assigned in the first mobile communication network to a second identification information assigned in the second mobile communication network, when the mobile communication terminal in which the first identification information is stored is situated in a region in which the second mobile communication network can be used and the mobile communication terminal uses the first mobile communication network via a second mobile communication network; and a notification unit that transmits a notification of a change of the identification information to a request apparatus that is connected to the second mobile communication network and is configured to request the mobile communication terminal to change the identification information, if it is determined that the identification information can be changed.. . ... Ntt Docomo Inc

05/05/16 / #20160128073

Radio base station, radio communication system and radio communication method

The present invention is designed to reduce the impact of inter-cell interference by interference control using signaling between radio base stations. In the radio communication system of the present invention, a radio base station carries out radio communication with a user terminal by using a ul/dl configuration, which represent the configuration of uplink subframes and downlink subframes in a radio frame. ... Ntt Docomo Inc

05/05/16 / #20160127974

Radio communication system and communication control method

A radio communication system includes: a visit information storage unit that stores plural visit information elements each indicating information on a visit to a cell visited by a user equipment; a cell visit detector that detects that the user equipment that was visiting a first cell starts a visit to a second cell differing from the first cell; a ping-ponging state determiner that determines whether a ping-ponging state has occurred, in which state start and ending of a visit to the second cell is repeated, wherein the determination is made based on a visit information element on a visit to the second cell visited by the user equipment; and a calculator that calculates a visit time length of the visit to the second cell in accordance with the determination by the ping-ponging state determiner.. . ... Ntt Docomo Inc

05/05/16 / #20160127959

Pdn gateway device and mobile communication method

When a handover of a ue (20) occurs, a p-gw (60) sets a downlink data forwarding path that passes via a target s-gw and a target enb, and when the serving gateway device switches from a source s-gw to a target s-gw that manages a target enb because of a transition of the ue (20), the p-gw (60) transmits an end marker, which indicates end of forwarding of the downlink data via a source enb, to the source s-gw in accordance with the setting of the downlink data forwarding path.. . ... Ntt Docomo Inc

05/05/16 / #20160127090

User terminal, radio base station and radio communication method

The present invention is designed to enable adequate feedback on the uplink even when ca and comp are employed between a plurality of radio base stations (inter-enb comp/ca). A receiving section that receives downlink signals from a first radio base station that forms a first cell and a second radio base station that forms a second cell, a generating section that generates a feedback signal in response to the downlink signal from each radio base station, and a control section that assigns the feedback signal in response to the downlink signal from the first radio base station to an uplink control channel and/or an uplink shared channel on the first cell depending on whether or not there is a ul grant, and assigns the feedback signal in response to the downlink signal from the second radio base station to the uplink shared channel on the first cell or the second cell regardless of whether or not there is the ul grant, are provided in a user terminal.. ... Ntt Docomo Inc

04/28/16 / #20160119934

Mobile station, base station, mobile communication system, transmission control method, and reception control method

A mobile station that communicates with a base station, including: means that determines whether to transmit, to the base station, quality information indicating radio quality when a predetermined time elapses based on a state, of the mobile station, which is an active state or not in discontinuous reception control; and means that, even when it is determined not to transmit the quality information based on the determination, transmits the quality information when the predetermined time elapses in a case where a scheduling request is transmitted to the base station before the predetermined time elapses.. . ... Ntt Docomo Inc

04/28/16 / #20160119844

Base station, user apparatus, congestion state notification control method, and switch control method

A base station for performing communication with a user apparatus that includes a function for switching connection between a first radio communication network and a second radio communication network, including: a group management unit configured to group a plurality of user apparatuses located in an area of the base station into a plurality of groups; and a notification control unit configured to transmit congestion state information indicating a congestion state in the first radio communication network for each group that is grouped by the group management unit, and to cause each group to perform connection switching between the first radio communication network and the second radio communication network.. . ... Ntt Docomo Inc

04/28/16 / #20160119825

Mobile communication method and radio base station

In a handover procedure between cells under different radio base stations (enb), “rrc diversity” is implemented. A mobile communication method includes: a step a of transmitting, by a radio base station (enb #1), “comp preparation” to a radio base station (enb #10); a step b of transmitting, by the radio base station (enb #10), setting information on a cell (#10) to the radio base station (enb #1); a step c of conducting, by the radio base station (enb #1), setting of the mobile station (ue) to perform comp transmission-reception; a step d of giving, by the mobile station (ue), the radio base station (enb #1) notification that radio quality in the cell (#10) satisfies a predetermined condition; and a step e of instructing, by the radio base station (enb #1), the radio base station (enb #10) to start scheduling for the mobile station (ue).. ... Ntt Docomo Inc

04/28/16 / #20160119816

Radio base station, user terminal and radio communication method

The present invention is designed to use radio resources effectively and improve the throughput of a radio communication system even when a plurality of small cells are placed densely. A radio base station controls the connecting cell of a user terminal, and has a selection section that selects candidate cells, the received power and/or the received quality of which in the user terminal is equal to or greater than a predetermined value, and a determining section that calculates the amount of data to transmit to serving user terminals, for each candidate cell, by taking into account the frequency band that is used, and determines a candidate cell where the amount of data is small, as the connecting cell of the user terminal.. ... Ntt Docomo Inc

04/28/16 / #20160119778

User apparatus, base station, user apparatus category information notification method, and user apparatus category information reception method

A user apparatus in a mobile communication system including a base station and a user apparatus, including: a support status determination unit configured to receive, from the base station, support status information indicating whether the base station supports a predetermine notification method on category information of the user apparatus, and to determine whether the base station supports the predetermined notification method based on the support status information; and a category information notification control unit configured, when the support status determination unit determines that the base station supports the predetermined notification method, to notify the base station of a combination of first category information and second category information so as to notify the base station of category information of the user apparatus.. . ... Ntt Docomo Inc

04/07/16 / #20160100431

Radio communication system and terminal device

A radio communication system includes a radio base station and a terminal device. The radio base station and the terminal device share correspondence information about subsets of preamble sequences obtained by segmenting preamble sequences available in the radio communication systems into groups, each of the subsets being associated with a received signal level at the terminal device and a number of repetitions for transmitting the preamble sequences of each of the subsets. ... Ntt Docomo Inc

04/07/16 / #20160099801

User terminal, radio base station and radio communication method

The present invention is designed to feed back feedback signals such as delivery acknowledgement signals properly even when the dl/ul configuration is reconfigured in tdd. A user terminal communicates, in time division duplexing, with a radio base station that reconfigures the dl/ul configuration, and has a judging section that judges a delivery acknowledgement in response to each dl subframe, and a feedback control section that allocates a delivery acknowledgement signal in response to each dl subframe to a ul subframe and sends feedback, and, when the number of dl subframes that correspond to a ul subframe is greater than a predetermined value in a radio frame after the reconfiguration of the dl/ul configuration, the feedback control section bundles at least part of the delivery acknowledgement signals for a plurality of dl subframes corresponding to the ul subframe, and sends feedback.. ... Ntt Docomo Inc

03/24/16 / #20160088672

Mobile communication terminal and radio access network device

A mobile communication terminal or radio access network that shortens a time of an out-of-service state while suppressing an increase of power consumption. The mobile communication terminal includes a communication control unit configured to make a cell selection using a parameter x notified by a network, if the terminal has failed to transmit an rrc connection request to a currently-visited cell #a n successive times.. ... Ntt Docomo Inc

03/24/16 / #20160088579

Radio communication system and communication control method

A radio communication system includes a first base station that is identified by a first cell identity, a second base station that is identified by a second cell identity, and a user device that can perform radio communication with each of the base stations. The user device detects a first transmission timing based on a first synchronization signal from the first base station and establishes synchronization with the first base station. ... Ntt Docomo Inc

03/24/16 / #20160088538

Handover method and radio base station

In implementation of “rrc diversity” in a handover procedure between cells under different radio base stations (enb), “ho command” is transmitted in a handover destination cell at an appropriate timing. A handover method of the invention includes: a step a of causing a radio base station (enb #1) to transmit “ho command” to a mobile station (ue); a step b of causing a radio base station (enb #10) to start transmission of the “ho command” to the mobile station (ue) based on a scheduling start instruction from the radio base station (enb); and a step c of causing the radio base station (enb #1) to repeat transmission of the “ho command” to the mobile station (ue) at a predetermined cycle for a period until the detection of a scheduling stop trigger.. ... Ntt Docomo Inc

03/24/16 / #20160088537

Mobile station

Appropriate decoding processing is performed and “ho command” is thus acquired in implementation of “rrc diversity” in a handover procedure between cells under different radio base stations (enb). A mobile station (ue) of the invention includes a reception unit (11) configured to receive dci from a radio base station (enb #1) and a radio base station (enb #10) through pdcch/e-pdcch when a handover from a cell (#1) to a cell (#10) is performed, and a decoding unit (12) configured to attempt decoding every pdsh designated by the dci received by the reception unit (11).. ... Ntt Docomo Inc

03/24/16 / #20160088530

Mobile communication system

Implementation of “rrc diversity” in a handover procedure between cells under different radio base stations (enb), while considering conditions in a physical layer, is disclosed. In a mobile communication system including a radio base station (enb #1) managing a cell (#1) and a radio base station (enb #10) managing a cell (#10), the radio base station (enb #1) and the radio base station (enb #10) are configured to transmit “ho command” to a mobile station (ue) connected to the cell (#1), respectively, when a handover to the radio base station (enb #10) is performed. ... Ntt Docomo Inc

03/24/16 / #20160088528

Handover method and radio base station

In a handover procedure between cells under different radio base stations (enb), “rrc diversity” is implemented while considering conditions in a pdcp layer and an rlc layer. A handover method of the invention includes the steps of: causing a radio base station (enb #1) to transmit to a radio base station (enb #10), information necessary for generating pdcp-pdu and rlc-pdu; causing the radio base station (enb #10) to transmit to the radio base station (enb), “ho ack” including “ho command”; and causing each of the radio base station (enb #1) and the radio base station (enb #10) to generate the rlc-pdu including the pdcp-pdu containing the “ho command” based on the information and to transmit the rlc-pdu to a mobile station (ue).. ... Ntt Docomo Inc

03/17/16 / #20160080985

Mobile communication method and radio base station

In a handover procedure between cells under different radio base stations (enb), “rrc diversity” is implemented at the initiative of a network. A mobile communication method of the invention includes the steps of: causing a mobile station (ue) to transmit a “measurement report” to a radio base station (enb #1); causing the radio base station (enb #1) to transmit “comp preparation” to a radio base station (enb #10); causing the radio base station (enb #10) to transmit setting information on a cell (#10) to the radio base station (enb #1); causing the radio base station (enb #1) to conduct setting of the mobile station (ue) to perform comp transmission-reception; causing the mobile station (ue) to notify the radio base station (enb #1) of radio quality in the cell (#10); and causing the radio base station (enb #1) to instruct the mobile station (ue) to activate the comp transmission-reception.. ... Ntt Docomo Inc

03/17/16 / #20160080983

Handover method, radio base station, and mobile station

This invention implements “rrc diversity” in a handover procedure between cells under different radio base stations (enb), while considering conditions in a mac layer. A handover method of the invention includes: a step a of notifying, by a radio base station (enb #1), a radio base station (enb #10) of a harq process; a step b of transmitting, by the radio base station (enb #1), “ho command” to a mobile station (ue) by using a harq process different from the harq process notified to the radio base station (enb #10); and a step c of transmitting, by the radio base station (enb #10), “ho command” to the mobile station (ue) by using the harq process notified by the radio base station (enb #1).. ... Ntt Docomo Inc

03/10/16 / #20160073407

User equipment and radio base station

User equipment used in a mobile communication system that includes a first radio base station, a second radio base station and the user equipment is provided. The user equipment has a first communication device configured to conduct frequency division duplexing (fdd) communication with the first radio base station, and a second communication device configured to conduct time division duplexing (tdd) communication with the second radio base station, wherein the tdd communication between the user equipment and the second radio base station is conducted using an uplink frequency spectrum of the fdd communication, the first communication device is configured to receive a control signal used for communication with the second radio base station from the first radio base station, and the second communication device is configured to establish, reconfigure, or release a radio resource between the user equipment and the second radio base station based upon the control signal.. ... Ntt Docomo Inc

03/10/16 / #20160073389

Radio base station, user terminal and radio communication method

The present invention is provided to randomize interference between small cells in a radio communication system in which the small cells are located to overlap a macro cell. The radio communication method of the present invention includes the steps of generating, in a small base station forming the small cell, a downlink signal by using a terminal-specific identity that is formed based on a first terminal-specific identity and a second terminal-specific identity, transmitting, in the small base station, the downlink signal to a user terminal, generating, in the user terminal, an uplink signal by using the terminal-specific identity, and transmitting, in the user terminal, the uplink signal to the small base station.. ... Ntt Docomo Inc

03/10/16 / #20160073360

Radio communication system and mobile terminal device

A radio communication system includes a radio base station and a mobile terminal device communicating with the radio base station using carrier aggregation, wherein upon occurrence of a triggering event of sending a power headroom report to the radio base station, the mobile terminal device is configured to determine whether there is a secondary cell that is in the process of activation, and wherein the mobile terminal device is configured to suspend transmission of the power headroom report to the base station for a predetermined time period if there is a secondary cell that is in the process of activation.. . ... Ntt Docomo Inc

03/10/16 / #20160073310

Mobile communication system

A system and method to appropriately perform a connection reestablishment procedure in a network adapted to an mfbi function is disclosed. In a mobile communication system, a radio base station (enb#a) is configured, when the radio base station (enb#a) determines that a mobile station (ue) is adapted to the mfbi function, to select a band out of bands which are supported by a cell under a radio base station (enb#b), the band having the highest priority to be selected by the mobile station (ue) in an “rrc_idle state”, and to send the radio base station (enb#b) “ho preparation” including kenb* created by using “dl earfcn” of the selected band.. ... Ntt Docomo Inc

03/10/16 / #20160072617

Radio base station, user terminal and radio communication method

In order to provide feedback information of a transmission acknowledgement signal or the like appropriately even in change in dl/ul configuration in tdd, the present invention provides a radio base station that communicates with a user terminal by time division duplex and is capable of controlling change in dl/ul configuration. The radio base station includes: a determining section that determines feedback timing of a transmission acknowledgement signal of a dl subframe in a radio frame before change in dl/ul configuration; and a control section that controls a ul subframe to use in feedback of the transmission acknowledgement signal of the dl subframe, based on the feedback timing. ... Ntt Docomo Inc

03/03/16 / #20160066211

User apparatus and collision detection method

A user apparatus that transmits and receives a discovery signal, including: collision detection means that detects a collision in a received discovery signal; collision notification means that, when a collision of a received discovery signal is detected by the collision detection means, transmits collision information indicating that a collision occurs in the received discovery signal; collision information reception means that receives collision information; and collision determination means that determines whether a collision occurs in a transmitted discovery signal transmitted by the user apparatus based on the collision information received by the collision information reception means.. . ... Ntt Docomo Inc

03/03/16 / #20160065388

Radio communication system, radio base station apparatus, and user equipment

A radio communication system includes a radio base station having multiple antenna elements arranged two-dimensionally, and a user equipment configured to perform radio communication with the radio base station. The radio base station is configured to transmit a reference signal used for channel estimation in two or more different configurations using a part or all of the antenna elements, and wherein the user equipment is configured to feed back at least one of horizontal channel information, vertical channel information, and inter-polarization channel information to the radio base station.. ... Ntt Docomo Inc

02/25/16 / #20160057693

User apparatus, base station, discovery resource selection method, and control signal transmission method

A user apparatus configured to perform transmission of a discovery signal by radio, including: means that determines a resource group pattern to be used by the user apparatus based on information transmitted from a base station, and determines a resource group including one discovery resource or a plurality of discovery resources that can be used for transmitting the discovery signal from among one resource group or a plurality of resource groups included in the resource group pattern; and means that selects a discovery resource to be used for transmitting the discovery signal from among the determined resource group.. . ... Ntt Docomo Inc

02/25/16 / #20160057670

Method and apparatus at the physical and link layer for mobile communications

In a cellular telecommunications network, a mobile communication system to offload data traffic from base stations to small-node devices, includes a radio base station, a plurality of small-node devices, a macro-base-station-to-the-small-node-device (bs2d) communication section configured to receive a first control-plane message from the radio base station over a bs2d communication link, a small-node-device-to-user-equipment (d2ue) communication section configured to transmit user-plane data to a user equipment over a wireless d2ue communication link established responsive to the first control-plane message, and a center small-node device. The center small-node device includes a buffer section, a backhaul communication section configured to receive the user-plane traffic data from a server over a backhaul link, and is configured to manage d2ue connections between the plurality of small-node devices and the mobile station, buffer data to be transmitted in downlink and uplink for the plurality of small-node devices, and conduct a link adaptation for the d2ue connections.. ... Ntt Docomo Inc

02/25/16 / #20160057650

Mobile station and radio base station

A mobile station ue notifies a radio base station of a total amount of data accumulated in a buffer with granularity finer than an lcg. A mobile station ue according to the present invention includes: a management unit 11 configured to manage lcgs and manage dfgs each of which is a group of one or more priorities assigned to one or more data flows; and a transmission unit 13 configured to notify a radio base station enb of a total amount of data remaining in a buffer for each of combinations of the lcgs and dfgs.. ... Ntt Docomo Inc

02/25/16 / #20160057622

Communication system, relay apparatus, and communication method

Provided are a communication system, a relay apparatus, and a communication method capable of achieving high security in a case of controlling devices such as electric power meters and acquiring data from the devices by connecting an autonomous distributed near field communication network such as a smart utility network to a public radio communication network. A relay apparatus 100 establishes a radio bearer with security ensured with a radio base station 40 by using a secret key associated with the relay apparatus 100 in the public radio communication network. ... Ntt Docomo Inc

02/25/16 / #20160057566

Communication system, relay apparatus, and communication method

A relay apparatus 100a holds an address management table tb1 in which an identifier of a terminal device 200a and an address of the terminal device 200a in a near field communication network are associated with each other, generates a terminal device-destined frame based on the identifier of the terminal device 200a in a received downlink packet, the terminal device-destined frame containing a command destined to the address of the terminal device 200a associated with the identifier of the terminal device 200a in the address management table tb1, and transmits the generated terminal device-destined frame to the near field communication network 60a.. . ... Ntt Docomo Inc

02/25/16 / #20160057448

Low-complexity intra prediction for video coding

The present invention provides a unique intra prediction process which improves the efficiency of video coding. H.264/avc uses reference pixels in a horizontal boundary located immediately above a target block to be predicted and reference pixels in a vertical boundary located immediately left of the target block. ... Ntt Docomo Inc

02/25/16 / #20160056909

Radio base station, user terminal and radio communication method

The present invention is designed to reduce interference between cells even when a plurality of cells are placed at a high density. In a radio base station, a receiving section that receives an uplink signal transmitted from a user terminal, and an interference estimation section that estimates the level of interference received from an other cell based on an uplink signal transmitted from a user terminal of the other cell, are provided, and the interference estimation section estimates the level of interference of each cell based on the uplink signal, and a blank state is assumed in the uplink signal at a resource position that varies on a per cell basis. ... Ntt Docomo Inc

02/25/16 / #20160056878

User apparatus and user assignment information estimation method

A user apparatus that is used in a radio communication system including a plurality of base stations, and that includes a function for performing interference reduction based on user assignment in an interference cell, including: interference pattern generation means that generates a plurality of interference patterns each of which is a combination of presence or absence of an interference signal in a given number of interference cells for the user apparatus; reception quality calculation means that calculates a reception quality after interference reduction for each of the plurality of interference patterns generated by the interference pattern generation means; and user assignment information estimation means that determines presence or absence of an interference signal in each interference cell corresponding to an interference pattern based on which the best reception quality is obtained in reception qualities calculated by the reception quality calculation means to be presence or absence of user assignment.. . ... Ntt Docomo Inc

02/25/16 / #20160056871

Radio communication system and radio base station apparatus

A radio communication system includes a first radio base station having multiple antenna elements, and user equipment, wherein, for initial connection of the user equipment to the first radio base station, the first radio base station applies different precoding vectors to a downlink user common signal transmitted to all users located in or near a serving area of the first radio base station, and transmits the downlink user common signal while changing the applied precoding vector; wherein the user equipment selects a desired one of the precoding vectors applied to the downlink user common signal, and reports a selection result to the first radio base station, and wherein the first radio base station precodes a data signal addressed to the user equipment using the selected precoding vector and transmits the precoded data signal to the user equipment.. . ... Ntt Docomo Inc

02/25/16 / #20160054881

Information terminal, operating region control method, and operating region control program

An information terminal having a touch panel includes an acquisition unit that acquires operation information related to an input operation on the touch panel, a determination unit that determines the amount of operation in a first specified operation in the operation information, and a control unit that reduces an operating region where an operation on the touch panel can be received relative to the touch panel screen in accordance with the amount of operation in the first specified operation, and the determination unit does not make determination on an operation start position of the input operation in the operation information.. . ... Ntt Docomo Inc

02/18/16 / #20160050682

Radio base station and mobile station

Priority control is performed using fpis. A radio base station enb according to the present invention includes: a bearer management unit 12 configured to manage fpis assigned to data flows received from a core network device s-gw via an s1 bearer; and a priority control unit 13 configured to perform priority control over the data flows received from the core network device s-gw via the s1 bearer, in which the bearer management unit 12 establishes a radio bearer with a mobile station ue for each of the fpis, and the priority control unit 13 transfers each data flow received from the core network device s-gw via the s1 bearer, to the radio bearer corresponding to the fpi assigned to the data flow.. ... Ntt Docomo Inc

02/18/16 / #20160050657

User terminal, small base station and communication method

In order to achieve enough randomization of uplink control signals between a plurality of small cells located in a macro cell and to simplify cell planning of the small cells, the present invention provides a user terminal that is capable of communicating with a macro base station covering a macro cell and a small base station covering a small cell located within the macro cell. The user terminal generates uplink signals using uplink signal sequences of zero autocorrelation except at a synchronization point, and allocates the uplink signals to subframes by using a hopping pattern where a sequence number of an uplink signal sequence is switched per subframe in a predetermined cycle. ... Ntt Docomo Inc

02/11/16 / #20160044722

Mobile communication system

An object is to perform a priority control that is more elaborate than that is performed by using a qci. In a mobile communication system according to the present invention, a mobility management node mme notifies a radio base station enb, in an “initial context setup procedure” or an “e-rab setup procedure”, following pieces of information in an associated form: an “e-rab id” of an e-rab to be established between a gateway device s-gw and a mobile station ue; one qci that is assigned to the e-rab; and one fpi that is assigned to data flow transmitted on the e-rab. ... Ntt Docomo Inc

02/11/16 / #20160041726

Terminal device and method for selecting object

A terminal device to accurately define a selection range by an intuitive operation when an object is selected on a touch panel display. The terminal device includes a touch panel display for displaying an object and sensing proximity or contact of a finger, a coordinate sensing unit for detecting a coordinate value of an approaching position or a contacting position of the finger to the touch panel display, and an object selecting unit. ... Ntt Docomo Inc

02/04/16 / #20160037460

Radio base station, user terminal and radio communication method

The present invention is designed to make possible link adaptation that is suitable for future radio communication systems. A radio base station according to the present invention has a coding section that encodes downlink data for each of a plurality of user terminals, a modulation section that modulates the downlink data for each of the plurality of user terminals, and a transmission section that multiplexes the downlink data for each of the plurality of user terminals on a per subband basis, and transmits the downlink data for each of the plurality of user terminals by using transmission power that is allocated to each of the plurality of user terminals on a per subband basis.. ... Ntt Docomo Inc

02/04/16 / #20160036619

Transmitting apparatus and transmitting method

A transmitting apparatus and a transmitting method are provided. The transmitting apparatus comprises: an encoder configured to encode data for a plurality of user equipments into corresponding encoded signals, respectively; a modulator configured to perform a joint modulation on the encoded signals for the plurality of user equipments to generate modulated signals, wherein the modulator performs the joint modulation by mapping bits of the encoded signals for the plurality of user equipments to a symbol corresponding to each constellation point of a constellation map of the modulated signals so that respective constellation points satisfy a gray mapping rule; a transmitter configured to transmit the modulated signals.. ... Ntt Docomo Inc

01/28/16 / #20160029350

Radio base station, user terminal and radio communication method

The present invention is designed to improve spectral efficiency in a radio communication system which can use non-orthogonal multiple access (noma). Steps are provided in which a radio base station configures one of a plurality of transmission mode including a first transmission mode, which groups a plurality of transmission methods including a transmission method to employ non-orthogonal multiple access (noma) and multiple-user multiple-input and multiple-output (mu-mimo), and a second transmission mode, which groups a plurality of transmission methods including a transmission method to employ this noma and open-loop transmit diversity, and transmits a downlink signal for this user terminal based on the configured transmission mode.. ... Ntt Docomo Inc

01/28/16 / #20160029252

Mobile communication method

A procedure for starting “inter-site ca” is performed while minimizing modification of an existing network configuration. A mobile communication method of the invention includes the steps of: causing a radio base station enb #1 to send a radio base station enb #11 “ca preparation;” causing the radio base station enb #11 to send the radio base station enb #1 “confirmation;” causing the radio base station enb #1 to send a mobile station ue “rrc connection reconfiguration;” causing the mobile station ue to send the radio base station enb #11 “rrc connection reconfiguration complete;” and causing the radio base station enb #11 to send the radio base station enb #1 “ca addition complete.”. ... Ntt Docomo Inc

01/28/16 / #20160026723

Generating resources for support of online services

A system and method is provided to analyze a database of concepts organized into categories, wherein each concept is an online textual document, to determine a numerical relationship between the concepts and to determine a hierarchy for the categories.. . ... Ntt Docomo Inc

01/21/16 / #20160021392

Low-complexity intra prediction for video coding

The present invention provides a unique intra prediction process which improves the efficiency of video coding. H.264/avc uses reference pixels in a horizontal boundary located immediately above a target block to be predicted and reference pixels in a vertical boundary located immediately left of the target block. ... Ntt Docomo Inc

01/21/16 / #20160021389

Image prediction encoding/decoding system

An encoding target region in an image can be partitioned into a plurality of prediction regions. Based on prediction information of a neighboring region neighboring a target region, the number of previously-encoded prediction regions in the target region, and previously-encoded prediction information of the target region, a candidate for motion information to be used in generation of a predicted signal of the target prediction region as a next prediction region is selected from previously-encoded motion information of regions neighboring the target prediction region. ... Ntt Docomo Inc

01/21/16 / #20160019471

Automatic task classification based upon machine learning

A system and method is provided that processes a training database of human-generated requests in each of a plurality of task categories with a machine learning algorithm to develop a task classifier model that may be applied to subsequent user requests to determine the most likely one of the task categories for the subsequent user request.. . ... Ntt Docomo Inc

01/14/16 / #20160014822

Base station and communication control method

In one aspect of the present invention, a base station includes a reception unit configured to receive a call request or a paging response according to circuit switching from a mobile station; a packet switched communication state determination unit configured to determine a state of packet switched communication of the mobile station, when the call request or the paging response is received from the mobile station; and a circuit switching communication processing unit configured to establish a circuit switched bearer using a radio parameter for circuit switched communication, when no packet switched communication is performed in the mobile station.. . ... Ntt Docomo Inc

01/14/16 / #20160014789

Base station apparatus, mobile terminal apparatus and communication control method

To provide a base station apparatus, mobile terminal apparatus and communication control method for enabling control adapted to interference inside a heterogeneous network to be performed to support the next-generation mobile communication system, a base station apparatus (20) shares at least a part of the frequency band with another base station apparatus (40) that covers a macro-cell, covers a pico-cell (c1), is capable of transmitting a downlink transmission frame at transmission timing different from the another base station apparatus (40), and is configured to set resources, in which the downlink transmission frame undergoes interference from another downlink transmission frame including a blank period transmitted from the another base station apparatus (40), as blank resources, and assign user data to the downlink transmission frame while avoiding the blank resources.. . ... Ntt Docomo Inc

01/14/16 / #20160014785

Radio base station, user terminal, radio communication system, and radio communication method

The present invention is designed to provide a radio base station, a user terminal, a radio communication system and a radio communication method of novel structures that can improve the efficiency of the use of radio resources sufficiently. A plurality of user terminals feed back channel state information to a radio base station, the radio base station selects, from a plurality of candidate user sets and a plurality of power ratio sets, each of the candidate user sets indicating candidates of user terminals to be subject to non-orthogonal-multiplexing over a given radio resource and each of the power ratio sets indicating a transmission power ratio of downlink signals for the user terminals indicated in each of the candidate user sets, a candidate user set and a power ratio set to use in downlink signal transmission, based on the channel state information that is fed back, and transmits downlink signals for a plurality of user terminals indicated in the selected candidate user set using the transmission power ratio indicated by the selected power ratio set, and the selected candidate user set receive the downlink signals.. ... Ntt Docomo Inc

01/14/16 / #20160014781

Radio base station, user terminal and radio communication method

In a communication environment where a plurality of operators coexist, in order to minimize interference between the operators and also improve use efficiency of radio resources, a radio base station is disclosed. The radio base station includes an allocation control section that controls allocation to make an ul carrier for uplink transmission and a dl carrier for downlink transmission orthogonal to each other in a frequency direction, and a transmission/reception section that performs transmission or reception of a signal by using either of the ul carrier and the dl carrier for a user terminal in one transmission time interval. ... Ntt Docomo Inc

01/14/16 / #20160013921

Radio base station, user terminal, radio communication system and radio communication method

To achieve traffic adaptation gain, while reducing inter-cell interference, a radio communication system in which tdd is used is disclosed. The radio communication system is one in which each radio base station in a cluster communicates with a user terminal by using a ul/dl configuration, and has a subset selection section that selects the subset to use in the cluster, from a plurality of subsets each of which includes a plurality of ul/dl configurations determined based on the number of fixed subframes, in which the transmission direction is fixed in the cluster, and a ul/dl configuration selection section that selects the ul/dl configuration to use to communicate with the user terminal, from a plurality of ul/dl configurations that are included in the selected subset.. ... Ntt Docomo Inc

01/14/16 / #20160013849

User equipment and base station

Techniques for providing codebooks extended by gain information that can be transmitted in a reduced amount of signaling are disclosed. One aspect of the present invention relates to a user equipment comprising: a transmission and reception unit configured to communicate a radio signal with a base station in accordance with mimo (multiple input multiple output) transmission; a codebook storage unit configured to store predefined codebooks to specify precoding matrices for use in the mimo transmission, wherein the codebooks are arranged to represent phase information and gain information; a channel measurement unit configured to measure channel conditions based on reference signals transmitted from multiple antennas in the base station; and a codebook selection unit configured to select a codebook to be indicated to the base station from the stored codebooks based on the measured channel conditions and instruct the transmission and reception unit to indicate feedback information to the base station, wherein the feedback information includes a codebook index for identifying the selected codebook.. ... Ntt Docomo Inc

01/07/16 / #20160007347

Radio base station, user terminal and radio communication method

A radio base station capable of reducing the impact of interference and improving the efficiency of the use of radio resources even when different dl/ul configurations are employed between neighboring transmitting/receiving points is disclosed. The radio base station can communicate with user terminals via time division duplex and is able to change and control dl/ul configurations, has a subframe type determining section that classifies subframes into fixed subframes or flexible subframes, in accordance with the relationship between the dl/ul configurations that are employed in the radio base station and the dl/ul configurations that are employed in other radio base stations, and a frequency allocation control section that applies mutually different frequency allocation methods to the fixed subframes and the flexible subframes.. ... Ntt Docomo Inc

01/07/16 / #20160007230

Network device and mobile station

A feedback packet is transmitted to an appropriate radio base station in rohc control. A radio base station (enb #1) of the invention includes a transmission unit (12) configured to send a mobile station (ue) instruction information prohibiting “piggybacking (sending of a feedback packet while adding the feedback packet to a data packet)” in the rohc control.. ... Ntt Docomo Inc

01/07/16 / #20160007219

Radio base station

A radio base station of the invention includes: a measurement unit 12 configured to measure a throughput of an “immediate mdt” target mobile station ue; and a management unit 13 configured to manage a ca-related state of the “immediate mdt” target mobile station ue, together with the throughput of the “immediate mdt” target mobile station ue which is measured by the measurement unit 12.. . ... Ntt Docomo Inc








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