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Ntt Docomo Inc patents (2017 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 so that communication can be carried out adequately even when the bandwidth to use is limited to partial reduced bandwidths in a system bandwidth. A user terminal, in which the bandwidth to use is limited to partial reduced bandwidths in a system bandwidth, has a receiving section that receives paging information that is transmitted in a predetermined subframe, and a control section that controls the receipt of a downlink shared channel and/or an enhanced downlink control channel by using information about a cfi (control format indicator) value that is acquired based on the paging information, and the receiving section detects a common search space, which is allocated in a fixed starting location in the predetermined subframe, and receives the paging information indicated in the common search space.. ... Ntt Docomo Inc

Radio base station, user terminal and radio communication method

The present invention is designed to improve spectral efficiency in a system that runs lte/lte-a by using a carrier in which lbt (listen before talk) is configured. One aspect of the present invention provides a radio base station in a radio communication system where the radio base station and a user terminal communicate by using a carrier in which lbt is configured, and this radio base station has a measurement section that executes lbt in a predetermined carrier sensing duration and acquires an lbt result, and a transmission section that transmits a downlink signal based on the lbt result, and the predetermined carrier sensing duration includes a first carrier sensing duration and a second carrier sensing duration, which is shorter than the first carrier sensing duration.. ... Ntt Docomo Inc

Radio base station, user terminal and radio communication method

The present invention is designed so that the decrease of spectral efficiency can be reduced even when coverage enhancement is attempted in communication by user terminals in which the bandwidth to use is limited to partial reduced bandwidths in a system bandwidth. A radio base station communicates with a user terminal in which the bandwidth to use is limited to partial reduced bandwidths in a system bandwidth, and this radio base station has a transmission section that transmits a downlink signal to the user terminal in repetitions, and a control section that controls transmission by applying a transmission method to use frequency hopping or a transmission method to use frequency scheduling to the downlink signal, and the transmission section transmits information about the transmission method to apply to the downlink signal to the user terminal.. ... Ntt Docomo Inc

Resource management in cloud systems

A method for waking up one or more sleeping small cell base stations in a wireless communication system for serving a user equipment is described. The wireless communication system includes a plurality of small cell base stations and one or more macro base stations. ... Ntt Docomo Inc

User equipment and base station

Control techniques of broadcast information reception operations at user equipment having coverage enhancement functionalities are disclosed. One aspect of the present invention relates to user equipment, comprising: a transmission and reception unit configured to transmit and receive radio signals to/from a base station; and a broadcast information combination unit configured to receive system information blocks from a cell across multiple windows.. ... Ntt Docomo Inc

Communication control method, radio communication system, radio base station and user terminal

A radio communication method for a user terminal performing communication in a cell where dl transmission and ul transmission vary in a time direction is provided. The radio communication method includes receiving downlink control information transmitted in a specific subframe; and analyzing a number and/or positions of subframes to be allocated for the dl transmission among subframes constituting a radio frame based on dl assignment in the downlink control information.. ... Ntt Docomo Inc

User terminal, radio base station and radio communication method

The present invention is designed so that communication is carried out adequately even when the number of component carriers that can be configured in the user terminal is increased compared to that of existing systems. According to one aspect of the present invention, a user terminal can communicate by using six or more component carriers (ccs), and has a receiving section that receives predetermined higher layer signaling and a downlink control signal including information about change of ul-dl configuration; and a control section that sets a ul-dl configuration of the cc using the information about the change of ul-dl configuration, wherein, the control section determines a cc to be configured using the information about the change of ul-dl configuration among the six or more ccs based on the predetermined higher layer signaling.. ... Ntt Docomo Inc

User terminal, radio base station and radio communication method

The present invention is designed so that communication can be performed adequately even when the number of component carriers (ccs) that can be configured in a user terminal is expanded and/or when ca is executed using unlicensed ccs. A user terminal communicates with a radio base station using carrier aggregation, and has a transmission section that transmits ul signals via each cc, and a control section that controls the transmission operations in the transmission section, and, when a plurality of ccs, including at least a first cc, which corresponds to a primary cc of an existing system, and a third cc, which is different from the first cc and a second cc that corresponds to a secondary cc of the existing system, are configured, the control section applies, to the third cc, random access operations that are different from those of the first and second ccs.. ... Ntt Docomo Inc

User terminal, radio base station and radio communication method

The present invention is designed so that the efficiency of use of ul resources is prevented from decreasing even when the band to use is limited to partial narrow bands in the system band. According to one aspect of the present invention, a user terminal, in which the band to use is limited to partial narrow bands in the system band, has a receiving section that receives downlink control information that relates to a resource to allocate to a pdsch (physical downlink shared channel), in an epdcch (enhanced physical downlink control channel), and receives the pdsch based on the downlink control information, a transmission section that transmits a pucch (physical uplink control channel) in response to the pdsch, and a control section that controls a pucch resource based on a prb (physical resource block) index that corresponds to the pdsch.. ... Ntt Docomo Inc

User equipment, feedback control method, and retransmission control method

User equipment to be used as receiving user equipment in a mobile communication system supporting d2d communication, the user equipment includes a feedback unit that receives a d2d signal from transmitting user equipment, and that transmits, to the transmitting user equipment, a feedback signal with respect to the d2d signal by using a predetermined resource; and a receiver that receives a retransmission d2d signal transmitted from the transmitting user equipment based on the feedback signal.. . ... Ntt Docomo Inc

User terminal, radio base station and radio communication method

The present invention is designed to optimize the uplink access procedure even when the band to use is limited to partial narrow bands in a system band. A user terminal, in which the band to use is limited to a partial narrow band in a system band, has a receiving section that receives system information that includes indication information of an uplink carrier frequency, from a radio base station, as system information for narrow bands, which is different from system information for the system band, and a transmission section that transmits a random access preamble to the radio base station in one of a plurality of narrow bands that are specified by the indication information of the uplink carrier frequency.. ... Ntt Docomo Inc

User apparatus and resource selection method

A user apparatus for use in a mobile communication system that supports d2d communication, including: a signal transmission unit configured to transmit a plurality of d2d signals; and a resource selection unit configured to select, from a predetermined resource pool, a radio resource having a time resource and a frequency resource for transmitting the plurality of d2d signals, wherein the resource selection unit is configured to select the radio resource such that the plurality of d2d signals are not transmitted by a same time resource.. . ... Ntt Docomo Inc

User apparatus and cell control method

A user apparatus performing communications with a base station in a mobile communication system which supports carrier aggregation is provided. The user apparatus includes a processing unit configured to receive from the base station an instruction for adding one or more sub cells associated with a specific secondary cell group; a management unit configured to, upon receiving the instruction, store information in which the specific secondary cell group is associated with the one or more sub cells; and a control unit configured to, in the case where a command for performing an operation for the specific secondary cell group is received from the base station, perform the operation for any one of the one or more sub cells based on the association.. ... Ntt Docomo Inc

Base station and user equipment

Schemes for configuring a longer drx cycle for user equipment are disclosed. One aspect of the present invention relates to a base station, comprising: a communication control unit configured to control radio communication with user equipment; and a drx control unit configured to control discontinuous reception (drx) by the user equipment, wherein the drx control unit manages a system frame number (sfn), a subframe number and a hyper sfn (hsfn) in the radio communication, wherein the hsfn counts how many times the sfn wraps around, and uses the hsfn to configure an extended drx (edrx) having a specified reception period for the user equipment.. ... Ntt Docomo Inc

11/23/17 / #20170339714

User terminal, radio base station and radio communication method

The present invention is designed so that it is possible to reduce the measurement-induced increase of load and power consumption in user terminals even when the number of component carriers that can be configured per user terminal is expanded. A user terminal communicates with a radio base station that configures groups (tags) comprised of one or more cells, and has a receiving section that receives information related to component carriers (ccs) included in the groups, and a measurement section that makes measurements on a per group basis based on the information related to the component carriers.. ... Ntt Docomo Inc

11/23/17 / #20170339666

Information communication terminal, peripheral device cooperation method, and program

An information communication terminal includes; a reception unit configured to receive setting values of notification setting for plural connected peripheral devices; a peripheral device setting storage unit configured to store the received setting values of notification setting for the plural peripheral devices; a service application setting storage unit configured to store setting values of notification setting from a service application to the plural connected peripheral devices by using the setting values stored in the peripheral device setting storage unit as initial values; a control unit configured to assign a setting value of notification setting to transmission data on the basis of a setting value stored in the service application setting storage unit when the transmission data are received from the service application; and a transmission unit configured to transmit the transmission data to which the setting value of notification setting is assigned to at least one peripheral device.. . ... Ntt Docomo Inc

11/23/17 / #20170339652

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

The present invention is designed to establish synchronization between transmission points when downlink signals are transmitted from a plurality of transmission points to a user terminal. A radio communication system has a first radio base station that forms a first cell, a second radio base station that forms a second cell, which is placed on the area of the first cell in an overlapping manner, and a user terminal that is capable of carrying out radio communication with the first radio base station and the second radio base station, and the second radio base station has a receiving section that receives synchronization correction information, which is for establishing synchronization with a synchronization target, from the user terminal, and a synchronization correction section that corrects synchronization based on the synchronization correction information.. ... Ntt Docomo Inc

11/16/17 / #20170332364

Uplink interference reduction method, and base station

An uplink interference reduction method executed in a radio communication system which includes a connected base station, and an interference base station to which an interference user apparatus transmitting an interference signal with respect to the connected base station is connected, includes control information transmission step, transmitting to the connected base station by the interference base station, control information used for reducing the interference signal at the connected base station, and interference reduction step reducing, by the connected base station, the interference signal using the control information, to acquire a desired signal transmitted from a user apparatus that is connected to the connected base station.. . ... Ntt Docomo Inc

11/16/17 / #20170332348

Paging control method, communication control apparatus and base station

A paging control method in a mobile communication system including a base station and a communication control apparatus, including: an instruction step in which, in a state where a connection between the base station and the communication control apparatus is established, the base station transmits a connection maintaining instruction signal to the communication control apparatus; and a paging step in which, when the communication control apparatus that receives the connection maintaining instruction signal receives downlink data for the user apparatus, the communication control apparatus holds the downlink data in a buffer and transmits a paging signal for the user apparatus while maintaining the connection between the base station and the communication control apparatus.. . ... Ntt Docomo Inc

11/16/17 / #20170332322

Gateway apparatus and communication method

A gateway apparatus provided between a radio base station in a mobile communication network and a terminal apparatus, including: notification means configured to notify a proxy apparatus, connected to the mobile communication network as an external apparatus, of information indicating that the gateway apparatus is activated; and storing control means configured to temporarily store data sequentially received from the terminal apparatus in data storage means, and after that, to transmit the data stored in the data storage means to the proxy apparatus.. . ... Ntt Docomo Inc

11/16/17 / #20170329463

Display control device and program

Selection unit selects any one of a plurality of images. Display controller displays preview information of content (information representing the content detail) corresponding to an image selected from among the any one of the plurality of images by selection unit. ... Ntt Docomo Inc

11/16/17 / #20170329287

System and program

Estimating unit estimates an alarm notification time. Presenting unit presents the estimated alarm notification time to a user. ... Ntt Docomo Inc

11/09/17 / #20170325243

User equipment apparatus and d2d communication method

A user equipment apparatus for supporting d2d (user equipment-to-user equipment) communication includes a generation unit configured to generate information about at least one of a transmission resource which can be used by the user equipment apparatus to transmit a d2d signal and a reception resource which can be used by the user equipment apparatus to receive a d2d signal; and a transmission unit configured to transmit the generated information to another user equipment apparatus; wherein the transmission resource and the reception resource are orthogonal in terms of time.. . ... Ntt Docomo Inc

11/09/17 / #20170325215

User terminal, radio base station and radio communication method

The present invention is designed so as to carry out the listening operation that accompanies ul transmission and/or ul transmission adequately when ul transmission is controlled based on the result of listening. The present invention provides a transmission section that transmits an uplink shared channel, an uplink control channel and an uplink reference signal, and a control section that controls the transmission of the uplink shared channel, the uplink control channel and/or the uplink reference signal based on the result of listening in the uplink, and, when the uplink reference signal is configured to be transmitted in a subframe in which the uplink shared channel and/or the uplink control channel are transmitted, the control section controls the transmission of the uplink reference signal based on the result of listening that is executed before the uplink shared channel and/or the uplink control channel are transmitted.. ... Ntt Docomo Inc

11/09/17 / #20170324452

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

An object is to enable proper operation of extended carrier aggregation that can allocate at least six component carriers to each user terminal. Provided is a user terminal that communicates with a radio base station that configures a plurality of cell groups each of which including one or more cells. ... Ntt Docomo Inc

10/26/17 / #20170311321

Base station and user equipment

Techniques for implementing mimo communication in accordance with reciprocity based precoding are provided. The present disclosure relates to a base station for implementing multi-antenna transmission that includes a communication control unit configured to control multi-antenna transmission with user equipment and a channel state estimation unit configured to estimate a channel state with the user equipment based on an uplink reference signal from the user equipment. ... Ntt Docomo Inc

10/26/17 / #20170311201

Base station

A base station is provided. The base station is used as a first base station in a mobile communication system including the first base station, a second base station communicating with the first base station, and a user apparatus communicating with the first base station. ... Ntt Docomo Inc

10/26/17 / #20170311151

Mobile communication system, communication control device, mobility management entity, and mobile communication method

A home subscriber server (hss) determines whether roaming of voice communication via an ip multimedia subsystem (ims) is supported in the visited public land mobile network (vplmn) or not, and transmits to a mobility management entity (mme) a signal that includes a ‘voice supported’ or ‘voice not supported’ indicator that indicates whether the roaming is supported or not. The mme receives the indicator from the hss, and transmits to a user equipment (ue) an ‘attach accept’ as a response to an ‘attach request’ for the vplmn. ... Ntt Docomo Inc

10/26/17 / #20170310434

User terminal, radio base station and radio communication method

A user terminal according to one aspect, can communicate with a radio base station by using a carrier where lbt (listen before talk) is configured, and has a receiving section that receives downlink data that is transmitted based on an lbt result in a specific subframe that includes an lbt symbol, and a control section that controls a receiving process of the downlink data, and, in this user terminal, the specific subframe is allocated periodically, and includes the lbt symbol in the last n symbols, a subframe in a predetermined period following the specific subframe includes a pdcch (physical downlink control channel) symbol in several symbols from the beginning, and the control section controls the receiving process of the downlink data, taking into consideration the lbt symbol and the pdcch symbol.. . ... Ntt Docomo Inc

10/12/17 / #20170295584

Base station and user equipment

Techniques for controlling a transport block size to implement harq sharing are disclosed. One aspect of the present invention relates to a base station, comprising: a cell management unit configured to manage cells for radio communication with user equipment; and a mac processing unit configured to control a retransmission operation via multiple cells by using harq sharing for managing one or more harq processes as a common harq process, wherein the cell management unit acquires communication quality of multiple harq sharing applied cells, and the mac processing unit controls to activate transmission via the multiple cells with a minimum transmission data size among transmission data sizes corresponding to the acquired communication quality of the respective cells.. ... Ntt Docomo Inc

10/12/17 / #20170295568

User terminal, radio communication system and radio communication method

The present invention is directed to dual connectivity, in which a control for synchronous dual connectivity and a control for asynchronous dual connectivity are appropriately applied. In a user terminal which communicates with a plurality of cell groups, respectively including one or more cells which utilize different frequencies, based on an indicator that indicates when an event occurs in the higher layer, if the indicator changes in a state where either of the control for synchronous dual connectivity and the control for asynchronous dual connectivity is being operated, the user terminal either performs a control that does not allow the switching to another dual connectivity control, or performs a control that switches to another dual connectivity control only a predetermined number of times.. ... Ntt Docomo Inc

10/12/17 / #20170294977

User apparatus, and cell measurement method

A user apparatus configured to communicate with a base station in a mobile communication system that supports carrier aggregation, including: a management unit configured to receive, from the base station, a configuration message for adding a cell or a cell group in the carrier aggregation, and perform configuration of the cell or the cell group, and to receive, from the base station, measurement configuration information on measurement of the cell or the cell group; and a measurement unit configured to allow not to perform measurement of the cell or the cell group based on the measurement configuration information until a predetermined condition is satisfied, and to perform measurement of the cell or the cell group based on the measurement configuration information when the predetermined condition is satisfied to transmit a measurement report to the base station.. . ... Ntt Docomo Inc

10/12/17 / #20170294943

Radio transmitting station

A radio transmitting station includes: multiple transmitting antenna elements configured to transform electrical signals into radio waves and emit the radio waves; a precoder configured to control a beam direction of the radio waves to be emitted from the multiple transmitting antenna elements by giving precoding weights to the electrical signals to be supplied to the multiple transmitting antenna elements; and at least one power adjuster configured to adjust power of an electrical signal that is to be supplied to at least a portion of the multiple transmitting antenna elements, such that differences between powers of the electrical signals to be supplied to the multiple transmitting antenna elements are reduced.. . ... Ntt Docomo Inc

10/05/17 / #20170290017

User terminal, radio base station, and radio communication method

According to the present invention, in an lte system, communication can appropriately carried out even in the case where a bandwidth utilized in the transmission/receiving of data signals and control signals is configured narrower than the system bandwidth. According to an embodiment, a user terminal is configured to carry out communication with a radio base station using a narrow bandwidth that is limited to a narrower bandwidth than a system bandwidth. ... Ntt Docomo Inc

10/05/17 / #20170289871

Base station and data transfer method

A base station in a master cell group configured to establish a bearer to a mobile station together with a base station in a secondary cell group for communication includes a data transfer instruction unit configured to transmit to the base station in the secondary cell group an instruction on whether to transfer downlink data in the base station in the secondary cell group to the base station in the master cell group upon deletion or modification of the secondary cell group or upon deletion of the bearer in the secondary cell group; a reception unit configured to receive the downlink data transferred from the base station in the secondary cell group according to the instruction; and a transmission unit configured to transmit the received downlink data to the mobile station.. . ... Ntt Docomo Inc

10/05/17 / #20170288793

Radio relay station

A radio relay station is arranged on a moving conveyance. The radio relay station receives downlink radio signals from a stationary base station fixed outside the conveyance, and transmits to destination user equipments in the conveyance downlink radio signals resulting from the downlink radio signals transmitted from the stationary base station. ... Ntt Docomo Inc

10/05/17 / #20170288758

Base station and user equipment

Some techniques for implementing estimation of channel states with high accuracy and efficient feedback of the channel states in 3d mimo are disclosed. One aspect of the present invention relates to user equipment for implementing 3d mimo (3-dimensional multiple-input multiple-output) communication, comprising: a channel state information generation unit configured to measure channel states of antenna ports of 3d mimo antennas in a base station with reference signals transmitted from the antenna ports and generate channel state information based on the measured channel states; and a channel state information feedback unit configured to use different channel state information feedback means for antenna ports in respective dimensions of the antennas to feed the generated channel state information back to the base station.. ... Ntt Docomo Inc

09/28/17 / #20170280468

User terminal, radio base station and radio communication method

In order to minimize reduction of the usage efficiency of radio resources even when a radio base station performs lbt in an lte/lte-a operating system, the present invention provides a user terminal capable of communicating with a radio base station of a given operator using an unlicensed band. The user terminal has: an obtaining section that obtains a plmn-id (public land mobile network identifier) of a cell that is detected in a cell search; a detecting section that detects the cell of an other operator cell that is different from the given operator based on the plmn-id; and a transmission section that transmits an identifier to specify the cell of the other operator and the plmn-id of the other operator to the radio base station.. ... Ntt Docomo Inc

09/28/17 / #20170280448

User terminal, radio base station and radio communication method

In order to prevent deterioration in communication quality even when lbt applies to ul transmission, the present invention provides a user terminal that has: a transmission section that transmits a transmission acknowledgement signal for a dl (downlink) data signal transmitted from a radio base station; and a control section that controls transmission of the transmission acknowledgement signal based on an lbt (listen before talk) result in uplink. When transmitting the transmission acknowledgement signal in a given ul (uplink) subframe, the control section determines a feedback timing of the transmission acknowledgement signal in accordance with the lbt result in a ul subframe prior to the given ul subframe.. ... Ntt Docomo Inc

09/28/17 / #20170280447

User apparatus and buffer control method

A user apparatus communicates with a base station in a mobile communication system which includes cells including a first cell and a second cell which uses a tti different from that of the first cell, includes a reception unit with a buffer for, in the case where decoding of downlink data received from the base station has failed, storing the downlink data in the buffer, and combining the downlink data stored in the buffer and retransmitted data transmitted from the base station based on acknowledgment information for the downlink data, and decoding the combined result; and a transmission unit for transmitting the acknowledgment information for the downlink data to the base station. The reception unit includes a buffer control unit for dividing the buffer with a dividing number based on the ttis of the first and second cells, and storing the downlink data in divided areas of the buffer.. ... Ntt Docomo Inc

09/21/17 / #20170273037

User apparatus, base station, and uplink transmission power reporting method

A user apparatus in a mobile communication system that includes a first and second base station that perform communication with the user apparatus by inter-base station carrier aggregation. The user apparatus includes a setting information reception unit that receives, from the first base station, first setting information for instructing whether to report uplink transmission power information to the first base station, and second setting information for instructing whether to report uplink transmission power information to the second base station. ... Ntt Docomo Inc

09/21/17 / #20170272975

User apparatus and base station

A user apparatus is provided. The user apparatus is included in a mobile communication system including a first base station, a second base station communicating with the first base station, and the user apparatus communicating with the first base station. ... Ntt Docomo Inc

09/21/17 / #20170272926

Mobile communication system, communication control device, mobility management entity, and mobile communication method

The disclosure provides a mobile communication system, a communication control device, a mobility management entity, and a mobile communication method which can avoid a failure in making an emergency call via an ims when a mobile station connects to a vplmn. An hss 100 judges whether or not an emergency call origination via an ims 500 is supported in the vplmn, and transmits a signal including an indicator, em supported or em not supported, which indicates whether or not the emergency call origination is supported, to an mme 300. ... Ntt Docomo Inc

09/21/17 / #20170272364

Enhanced local access in mobile communications using small node devices

A network device in a wireless communication system includes a first communication circuit that receives a first control-plane message from a base station (bs) over a first communication link; a second communication circuit that transmits user-plane data to a user equipment (ue) over a second communication link established responsive to the first control-plane message; and a third communication circuit that receives the user-plane traffic data from a server over a third communication link. The ue communicates user-plane data with the bs and the network device simultaneously at a predetermined time. ... Ntt Docomo Inc

09/21/17 / #20170272139

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

A user terminal includes a receiving section that receives a signal subjected to multiplexing in a power dimension in a given layer and that receives information about the multiplexing in the power dimension; and a signal processing section that demodulates a signal for the user terminal from the multiplexed signal based on the information about the multiplexing in the power dimension.. . ... Ntt Docomo Inc

09/14/17 / #20170265225

User terminal, radio base station and radio communication method

The present invention is designed to prevent producing interference with ul signals even when a user terminal caries out lbt in a system in which lte/lte-a is run in an unlicensed band. A user terminal according to one aspect of the present invention provides a user terminal that can communicate with a radio base station by using an unlicensed band, and this user terminal has a receiving process section that detects a channel state in the unlicensed band by performing lbt (listen before talk) in a sensing subframe, a control section that controls a predetermined subframe as the sensing subframe, and a transmission section that transmits predetermined information that relates to pusch transmission in the sensing subframe based on a result of lbt.. ... Ntt Docomo Inc

09/14/17 / #20170265207

User terminal, radio base station and radio communication method

The present invention is designed to control ul communication and dl communication flexibly and improve the throughput and the quality of communication in radio communication. The present invention provides a transmission section that transmits uplink data by using an uplink shared channel, a receiving section that receives downlink control information and downlink data that are transmitted from a radio base station, and a control section that controls the transmission of a delivery acknowledgement signal in response to the downlink data that is received, and the receiving section receives downlink data (dl-pusch) that is transmitted using the uplink shared channel, and the control section controls a delivery acknowledgement signal in response to the dl-pusch to be transmitted at a predetermined timing.. ... Ntt Docomo Inc

09/14/17 / #20170265145

Base station, user equipment, and radio communication system

For each ue, a base station determines the number of streams for transmitting a data signal, performs different precoding on the data signal depending on the ue, and allocates different transmission powers to at least two ues. The base station transmits streams addressed to the at least two ues in a form in which these streams are non-orthogonally mixed, with transmission powers that are different for the ues. ... Ntt Docomo Inc

09/14/17 / #20170265095

User terminal, radio communication system and radio communication method

In order to measure and report reception quality appropriately in a radio communication system (laa system) supporting lbt with an unlicensed band, the present invention provides a user terminal capable of communicating with a radio base station using a first frequency carrier configured with lbt (listen before talk). The user terminal has: a control section that, when a beacon reference signal of a connecting cell is detected by lbt, determines that a channel of the connecting cell is in an idle state (lbtidle) and controls to measure reception quality in an lbtidle subframe; an obtaining section that obtains a measurement result of the reception quality in the lbt period; and a transmission section configured to transmit the measurement result.. ... Ntt Docomo Inc

09/14/17 / #20170264398

Terminal and communication system

There is provided a terminal for communicating with a base station apparatus, the terminal including a receiver that receives, from the base station apparatus, instruction information for performing an operation of an error correction process to be executed between the base station apparatus and the terminal, the instruction information including at least one of a process number of a process to be used for the error correction process, a time from receiving a signal until transmitting a reception response, and a timer value indicating a time from receiving the signal until receiving a retransmitted signal; and a processor that executes the error correction process based on the instruction information received by the receiver.. . ... Ntt Docomo Inc

09/14/17 / #20170263036

User interface device, program, and method of notifying content

A user interface device according to the present invention includes: acquisition unit acquisition unit that acquires content to be notified by a character image, the character image interacting with a user when the character image is displayed on a screen; display control unit that displays on the screen the character image performing a particular action when the acquired content is categorized as a particular type; and notification unit that notifies the user of the content categorized as the particular type, when input is received from the user when the character image is performing the particular action, by way of the character image.. . ... Ntt Docomo Inc

09/07/17 / #20170257864

User terminal and radio base station

To improve throughput and communication quality in radio communication by flexibly controlling ul transmission and dl transmission, a user terminal according to one aspect of the present invention is a user terminal that communicates with a radio base station using a downlink subframe for enabling a first downlink signal to be received, and an uplink subframe for enabling an uplink signal to be transmitted, and is characterized by having a transmission section that transmits an uplink signal using a predetermined radio access scheme in an uplink subframe, a reception section that receives a second downlink signal transmitted using the predetermined radio access scheme in an uplink subframe, and a control section that selects a transmission mode applied to the second downlink signal from a transmission mode applicable to the first downlink signal and a transmission mode applicable to the uplink signal to control reception processing.. . ... Ntt Docomo Inc

09/07/17 / #20170257788

User apparatus and offset reporting method

A user apparatus including a function for performing communication with a plurality of base stations that includes a first base station and a second base station by dual connectivity is disclosed. The user apparatus includes a measurement unit configured, in a state where the user apparatus performs communication by the dual connectivity, to receive measurement configuration information, from the first base station, for instructing to report an offset indicating a difference between a radio frame in a cell formed by the first base station and a radio frame in a cell formed by the second base station, and to measure the offset according to the measurement configuration information. ... Ntt Docomo Inc

09/07/17 / #20170257640

Image predict coding method, image predict coding device, image predict coding program, image predict decoding method, image predict decoding device, and image predict decoding program

A predictive coding system performs predictive encoding by determination of an optimum prediction mode from prediction methods for a pixel signal of a target block. A predicted signal is generated according to the determined mode, and a residual signal is determined. ... Ntt Docomo Inc

08/31/17 / #20170251395

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

08/31/17 / #20170251223

Video encoding method, video decoding method, video encoding apparatus, video decoding apparatus, video encoding program, and video decoding program

A video processing system 100 is provided with video encoding device 10 and video decoding device 20. The video encoding device 10 implements backward interframe prediction from a temporally subsequent frame and outputs information indicating that an option to eliminate use of a decoded image of the temporally subsequent frame was chosen. ... Ntt Docomo Inc

08/24/17 / #20170245319

User apparatus, base station, and discontinuous reception method

A user apparatus is provided. The user apparatus is used in a mobile communication system supporting device-to-device (d2d) communications. ... Ntt Docomo Inc

08/24/17 / #20170245142

User apparatus and soft buffer size determination method

A user apparatus configured to perform communication with a base station in a mobile communication system that supports downlink spatial multiplexing, including transmission means configured to transmit category information of the user apparatus to the base station; reception means configured to receive configuration information from the base station; soft buffer size determination means configured, if the category information is a value equal to or greater than a predetermined value and if a parameter indicating a transmission mode corresponding to the downlink spatial multiplexing and predetermined additional information are received as the configuration information, to determine a soft buffer size used for downlink data reception processing in the user apparatus by using the total number of soft channel bits corresponding to the category information.. . ... Ntt Docomo Inc

08/24/17 / #20170244501

User apparatus and distance estimation method

A user apparatus is provided. The user apparatus is used in a mobile communication system in which device to device (d2d) communications are supported. ... Ntt Docomo Inc

08/17/17 / #20170238349

User apparatus and base station

A user apparatus is provided which communicates with a base station in a mobile communication system which supports lte. The user apparatus includes a bearer establishing unit configured to establish one or more radio bearers between the user apparatus and the base station; a control unit configured to control activation and deactivation of each of the established radio bearers based on an instruction from the base station; and a communication unit configured to transmit and receive data to and from the base station by using the activated radio bearers.. ... Ntt Docomo Inc

08/17/17 / #20170238297

Communication control method, radio communication system, small base station, and user apparatus

A small base station executes radio communication using multiple antennas. There are set multiple antenna groups that each include all or a portion of the antennas and multiple antenna group patterns that each include at least one of the antenna groups. ... Ntt Docomo Inc

08/17/17 / #20170238261

Base station, user equipment, and radio communication system

A base station determines transmission powers for streams to be transmitted to ues, performs precoding on data signals and demodulation reference signals (dm-rss), transmits a mixed data signal with non-orthogonal data signals respectively addressed to the ues being mixed, and also transmits the dm-rss. The base station allocates resource elements to be shared by the ues to the dm-rss for the ues regardless of whether the numbers of streams to be transmitted to the ues are the same. ... Ntt Docomo Inc

08/17/17 / #20170238204

User apparatus and measurement control method

A user apparatus for use in a mobile communication system, including: determination means configured to determine whether the user apparatus can take both states of a discontinuous reception state and a non-discontinuous reception state at the same time; and measurement control means configured, if it is determined that the user apparatus can take both states of a discontinuous reception state and a non-discontinuous reception state at the same time by the determination means, to determine which measurement condition to use for performing measurement between a measurement condition for when in a discontinuous reception state and a measurement condition for when in a non-discontinuous reception state, and to perform measurement using a determined measurement condition.. . ... Ntt Docomo Inc

08/17/17 / #20170237473

Radio communication system, radio base station apparatus and retransmission control method

A radio communication system, a radio base station apparatus and a retransmission control method are disclosed. The retransmission control method is a retransmission control method in a radio communication system which has a first radio base station apparatus and a second radio base station apparatus that carry out coordinated multiple-point transmission with respect to a user terminal, and in which coordinated multiple-point transmission is applicable. ... Ntt Docomo Inc

08/10/17 / #20170231000

User terminal, radio base station and adaptive modulation and coding method

In one aspect, the adaptive modulation and coding method includes, in a user terminal, receiving a modulation and coding scheme (mcs) index, acquiring a modulation order corresponding to the received mcs index as a modulation order of a downlink shared channel, from a first table in which mcs indexes are associated with modulation orders including 8 and transport block size (tbs) indexes, and a second table is provided in which mcs indexes are associated with modulation orders of less than 8 and tbs indexes, and the first table is provided by puncturing a combination of a modulation order and a tbs index in the second table so that the first table and the second table are equal in a number of bits for an mcs index. In other aspects, a user terminal and a radio base station are provided.. ... Ntt Docomo Inc

08/10/17 / #20170230976

Radio base station, user terminal and radio communication method

The present invention is designed to control ul communication and dl communication flexibly and improve throughput in radio communication. The present invention provides a receiving section that receives uplink data that is transmitted from a user terminal by using an uplink shared channel (pusch), a transmission section that transmits downlink control information and downlink data to the user terminal, and a control section that controls scheduling for the user terminal, and the control section controls the transmission of the downlink data using the uplink shared channel (pusch).. ... Ntt Docomo Inc

08/10/17 / #20170230898

Mobile station, base station, restriction control method, and broadcast information transmission method

A mobile station for receiving broadcast information for restriction control from a base station in a network environment shared by a plurality of operators includes a reception unit configured to receive from the base station the broadcast information including restriction control skip information indicating a type of a call which is not subject to restriction control; and a restriction control determination unit configured to identify restriction control skip information corresponding to an operator with which the mobile station registers from the received broadcast information and determine whether to apply the restriction control.. . ... Ntt Docomo Inc

08/10/17 / #20170230854

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

The present invention is designed to reduce the increase of power consumption in user terminals in a radio communication system in which small cells are detected by using drss. A user terminal, according to one aspect of the present invention, is capable of communicating with radio base stations that form cells, and has a receiving section that receives detection/measurement signals that are transmitted respectively from a plurality of cells, a control section that controls the synchronization signals included in the received detection/measurement signals, and a receiving process section that measures the channel state measurement signals included in the received detection/measurement signals based on the selected synchronization signal.. ... Ntt Docomo Inc

08/10/17 / #20170230815

User apparatus, base station, and different frequency d2d monitoring method

A user apparatus for use in a mobile communication system that supports d2d communication, including: measurement gap control means configured to transmit a configuration request of a measurement gap for monitoring a different frequency d2d signal to a base station of a connecting or residing cell; and d2d communication means configured to monitor the different frequency d2d signal by using the measurement gap that is configured based on the configuration request.. . ... Ntt Docomo Inc

08/03/17 / #20170223699

User apparatus, and resource control method

A user apparatus for use in a mobile communication system that supports d2d communication, including: d2d communication means that transmits a d2d signal to another user apparatus by using a resource for d2d communication assigned from a base station in the mobile communication system; and resource control means that transmits, to the base station, a resource release request signal for requesting release of a resource for d2d communication assigned from the base station.. . ... Ntt Docomo Inc

08/03/17 / #20170223550

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

The present invention is designed to prevent producing interference with ul signals even when a user terminal caries out lbt in a system in which lte/lte-a is run in an unlicensed band. A user terminal according to one aspect of the present invention provides a user terminal that can communicate by using an unlicensed band, and this user terminal has a receiving process section that detects a channel state in the unlicensed band by performing lbt (listen before talk) in a sensing subframe, and a control section that controls a predetermined subframe as the sensing subframe based on a sensing pattern.. ... Ntt Docomo Inc

08/03/17 / #20170222693

Radio transmission station and radio communication network

A radio transmission station gives beamforming weights to electrical signals to control directions of radio-wave beams emitted from transmitting antennas. The radio transmission station generates a beam-discovery signal (bds) that enables a radio reception station, after the radio reception station receives the beams, to identify the directions of the beams, and emits the bds beams in multiple directions. ... Ntt Docomo Inc

08/03/17 / #20170220791

Terminal device, authentication information management method, and authentication information management system

A terminal device, an authentication information management method, and an authentication information management system for securing a security level of authentication information while maintaining the convenience for a user. A mobile device determines whether communication with a wearable device is possible and determines whether the mobile device is able to communicate with an authentication server. ... Ntt Docomo Inc

08/03/17 / #20170220371

Virtualized resource management node and virtual machine migration method

A virtual resource management node to seamlessly migrate a virtual machine with less influence on services in an nfv environment. A vim is a vim for managing each virtualized resource that is included in an nfv environment including virtualized resources including a physical machine in which a virtual machine having a vnf being a virtualized communication function is implemented, and the vim includes a switching unit for switching a network flow from a virtual machine of a migration source to a virtual machine of a migration destination, or switching a system between an active (act) system virtual machine of a migration source and a standby (sby) system virtual machine of a migration destination.. ... Ntt Docomo Inc

07/27/17 / #20170215205

Radio base station, user terminal and radio communication method

The present invention is designed so that the decrease of throughput can be reduced even when lbt is used in a radio communication system which runs lte/lte-a and/or the like in an unlicensed band. A radio base station communicates with a user terminal that can use a licensed band and unlicensed band, and has a detection section that detects signals transmitted from other transmission points, an acquiring section that acquires the identification numbers of transmission points corresponding to signals that are detected, and a transmission section that transmits data signals and demodulation reference signals in the unlicensed band, and sequences of the demodulation reference signals are linked with the identification numbers of the transmission points, and the transmission section transmits information about the identification numbers of the other transmission points to the user terminal.. ... Ntt Docomo Inc

07/27/17 / #20170215107

User terminal, radio base station and radio communication method

The present invention is designed so that, even when a user terminal connects with a plurality of radio base stations by employing dual connectivity (dc), the deterioration of uplink communication quality can be reduced. A user terminal communicates with a first radio base station that configures a first cell group and a second radio base station that configures a second cell group, by using dual connectivity, and has a transmission section that transmits an ul signal and/or a ul channel that includes an srs to each cell group, and a control section that controls the transmission power of the ul signal and/or the ul channel for each cell group, and the control section controls the transmission power of the ul signal and/or the ul channel for each cell group based on the guaranteed power that is configured in at least one of the cell groups.. ... Ntt Docomo Inc

07/27/17 / #20170214603

Domain control method and domain control device

An integrated control device, to implement automatic address assignment in a path spanning two or more administrative domains, and to implement communication between a plurality of administrative domains, acquires definition information that defines protocols used in each administrative domain from an inter-administrative domain communication protocol stack list table, acquires available addresses of each protocol in each administrative domain which can be used for communication between the respective administrative domains from an available address range table, acquires a communication route from a starting point administrative domain to an ending point administrative domain, specifies domains that use the respective protocols on the communication route by using the definition information, assigns protocol information such as available addresses of each protocol between the specified domains by using an available address range table and notifies the assigned address to each domain.. . ... Ntt Docomo Inc

07/20/17 / #20170208579

User equipment, mobile communication system, and deactivation timer control method

User equipment that executes carrier aggregation includes a controller that executes timer control for deactivating a cell used for the carrier aggregation, based on expiration of a timer; and a receiver that receives, from the base station, setting information including a timer value of the timer used in the controller, wherein, when the setting information including a common timer value that is common for multiple cells used for the carrier aggregation and an individual timer value that is specified for each cell is received, the controller executes the timer control by applying the individual timer value to the specified cell, and when another cell is used for which no individual timer value is specified, the timer control is executed by applying the common timer value.. . ... Ntt Docomo Inc

07/20/17 / #20170208555

User apparatus, mobile communication system, and signaling value application method

A user apparatus in a mobile communication system including a base station and the user apparatus, including: reception means configured to receive a plurality of prioritized signaling values corresponding to a band that the user apparatus uses from the base station; selection means configured to select a signaling value of the highest priority from among signaling values that the user apparatus can apply in the plurality of signaling values; and control means configured to perform control of transmission power by applying the signaling value selected by the selection means.. . ... Ntt Docomo Inc

07/20/17 / #20170208552

Base station and user device

A base station, according to received qualities at user devices, allocates a downlink transmission power to each user device. The base station transmits a mixed data signal in which data signals mutually not orthogonal and each addressed to a corresponding user device are mixed. ... Ntt Docomo Inc

07/20/17 / #20170208479

Radio base station and radio communication method

The present invention is designed to apply beam forming control between base stations in accordance with traffic that varies over time or geographically. A radio base station can exchange control information with a neighbor radio base station via backhaul, and has a transmitting/receiving section that transmits and receives the control information through backhaul signaling, and a control section that controls the antenna beam pattern of one or both of the neighbor radio base station and the radio base station based on traffic information and information about antenna beam forming for the neighbor radio base station and the radio base station, which are included in the control information.. ... Ntt Docomo Inc

07/20/17 / #20170208340

Video prediction encoding device, video prediction encoding method, video prediction encoding program, video prediction decoding device, video prediction decoding method, and video prediction decoding program

A predicted signal generation unit provided in a video predictive encoding device estimates a zero-th motion vector for derivation of a zero-th predicted signal, selects a zero-th motion vector predictor similar to the zero-th motion vector, and generates zero-th side information containing a zero-th motion vector predictor index to identify the motion vector predictor and a motion vector difference determined from the zero-th motion vector and the zero-th motion vector predictor. The video predictive encoding device selects a motion vector for generation of a first predicted signal having a high correlation with a target region, generates first side information containing a first motion vector predictor index to identify the motion vector as a first motion vector predictor, sets the first motion vector predictor to a first motion vector, and combines the zero-th and first predicted signals to generate a predicted signal of the target region.. ... Ntt Docomo Inc

07/20/17 / #20170208339

Video prediction encoding device, video prediction encoding method, video prediction encoding program, video prediction decoding device, video prediction decoding method, and video prediction decoding program

A predicted signal generation unit provided in a video predictive encoding device estimates a zero-th motion vector for derivation of a zero-th predicted signal, selects a zero-th motion vector predictor similar to the zero-th motion vector, and generates zero-th side information containing a zero-th motion vector predictor index to identify the motion vector predictor and a motion vector difference determined from the zero-th motion vector and the zero-th motion vector predictor. The video predictive encoding device selects a motion vector for generation of a first predicted signal having a high correlation with a target region, generates first side information containing a first motion vector predictor index to identify the motion vector as a first motion vector predictor, sets the first motion vector predictor to a first motion vector, and combines the zero-th and first predicted signals to generate a predicted signal of the target region.. ... Ntt Docomo Inc

07/20/17 / #20170208337

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

07/20/17 / #20170208019

Slice management system and slice management method

A slice management system and a slice management method that can dynamically adjust the amount of resources when the amount of resources is insufficient to create a slice. A storing unit of a nfvo stores slice utilization status information. ... Ntt Docomo Inc

07/20/17 / #20170206115

System and method

A system and a method that can allocate a service to a slice without wasteful use of resources. A storing unit stores a function connection table. ... Ntt Docomo Inc

07/13/17 / #20170201603

User apparatus, and duplicated packet processing method

A user apparatus in a mobile communication system in which packets of a bearer are distributed among a plurality of base stations, and the distributed packets of the bearer are transmitted from the plurality of base stations to the user apparatus, including: a reception unit configured to sequentially receive packets of the bearer from the plurality of base stations; and a duplicated packet processing unit configured, when detecting an duplicated packet, from packets received by the reception unit, which is a duplicate of a packet, to determine whether re-establishment of a predetermined packet communication protocol including a header compression and decompression protocol is being performed in the user apparatus, and, when re-establishment of the predetermined packet communication protocol is not being performed, to discard the duplicated packet without performing header decompression processing of the duplicated packet.. . ... Ntt Docomo Inc

07/06/17 / #20170196024

Mobile station

An object is to increase opportunities for starting “inter-band ca”. A mobile station ue of the present invention includes a transmission unit 14 configured to postpone transmission of a random access preamble in a cell #2 when the mobile station ue in a “rrc_connected state” in a cell #1 detects a start trigger of a random access procedure in the cell #2, and determines that an uplink signal is being transmitted in the cell #1. ... Ntt Docomo Inc

07/06/17 / #20170195889

Radio base station, user terminal and radio communication method

The present invention is designed to prevent the deterioration of communication quality even when lbt is used in a radio communication system that runs lte/lte-a and/or the like in an unlicensed band. A radio base station communicates with a user terminal that can use a licensed band and an unlicensed band, and has a transmission section that transmits a plurality of dl signals in the unlicensed band, and a control section that controls the transmissions of the dl signals in the unlicensed band based on the results of lbt (listen before talk), and the control section control section controls the transmission of part of the dl signals among the plurality of dl signals without applying lbt. ... Ntt Docomo Inc

07/06/17 / #20170195850

Inter-network connection control device, and connection control method

An inter-network connection control device used in an interconnected network includes a connection request signal forward unit that receives, from a call control device in a specific communication network, a connection request signal addressed to another communication network; an address query unit that queries an address resolution device for an address corresponding to a destination telephone number included in the connection request signal received from the connection request signal forward unit, and that obtains the address from the address resolution device; and a forward instruction unit that instructs the call control device to forward the connection request signal to the address obtained by the address query unit.. . ... Ntt Docomo Inc

07/06/17 / #20170195088

User equipment and base station

Techniques for controlling harq processes in uplink communication to implement low latency communication are disclosed. One aspect of the present invention relates to user equipment, comprising: a transmission and reception unit configured to transmit and receive radio signals to/from a base station; and an harq process control unit configured to control multiple harq processes for uplink communication with the base station, wherein the harq process control unit asynchronously transmits uplink data from the multiple harq processes to the base station in accordance with a predetermined transmission method allowing the base station to identify a transmitting harq process of received uplink data.. ... Ntt Docomo Inc

07/06/17 / #20170192811

Automated configuration of virtual infrastructure manager access for the virtual network function manager

A method and apparatus for configuring a virtual network function manager (vnfm) managing a virtual network function (vnf) to access a virtual infrastructure manager (vim), wherein the vnfm accesses the vim through an interface, the interface having a vim interface type, and the vnfm supports multiple vim interface types. The method includes obtaining by the vnfm information about the vim interface type supported by the vim, and accessing the vim by the vnfm through the interface according to the information about the vim interface type.. ... Ntt Docomo Inc

07/06/17 / #20170192630

Display control device, program, and image display method

A display control device including at least: extraction unit configured to extract a plurality of items that are to be displayed; and display control unit configured to display a plurality of images that correspond to the plurality of extracted items, in a predetermined arrangement on a screen such that the plurality of images are cyclically movable. Display control unit is configured to determine whether or not each of the plurality of extracted items satisfies a predetermined condition, and responsive to stopping cyclic movement of the plurality of images, display an image that corresponds to an item that satisfies the predetermined condition, out of the plurality of images, at a particular position.. ... Ntt Docomo Inc

06/29/17 / #20170188393

User apparatus and transmission control method

A user apparatus in a communication system including a first base station and a second base station that perform communication with the user apparatus by inter-base station carrier aggregation, including: a maximum transmission power holding unit configured to hold a maximum transmission power that is configured beforehand for the first base station; a transmission power determination unit configured to determine whether a transmission power that is used by the user apparatus for performing signal transmission to the first base station reaches the maximum transmission power held by the maximum transmission power holding unit; and a transmission control unit configured, when it is determined that the transmission power reaches the maximum transmission power by the transmission power determination unit, to stop signal transmission to the second base station.. . ... Ntt Docomo Inc

06/29/17 / #20170188392

User equipment and method

Techniques for allowing a base station indicating reconfiguration for user equipment to detect whether an ra procedure performed in response to the reconfiguration indication is successful or unsuccessful. A user equipment with dual connectivity functionality communicates with a master base station and a secondary base station simultaneously, and includes a transmission and reception unit that transmits and receives radio signals to/from the master and secondary base stations; an ra processing unit that performs a random access (ra) procedure; and a timer management unit that activates a timer upon detecting an ra procedure activation event for triggering activation of the ra procedure for the secondary base station. ... Ntt Docomo Inc

06/29/17 / #20170188335

Information notification method, mobile communication system and base station

An information notification method in a mobile communication system including a first base station and a second base station that perform communication with a user apparatus by inter-base station carrier aggregation, including a step in which the first base station notifies the second base station of a configuration change request including first desired setting information; a step in which the second base station notifies the first base station of second desired setting information; a step in which the first base station determines first setting information and second setting information to be set to the user apparatus, and notifies the user apparatus of the first setting information and the second setting information; and a step of, after completion of setting of the first setting information and the second setting information to the user apparatus, notifying the second base station of information on the setting.. . ... Ntt Docomo Inc

06/29/17 / #20170188261

User equipment, collision reporting method, base station, and resource allocation method

User equipment for receiving a discovery signal to be used for inter-user equipment discovery includes a discovery signal receiver that receives the discovery signal transmitted, within a resource pool for transmitting the discovery signal, from any other user equipment; a collision detector that detects collision of discovery signals; and a reporting unit that reports a detected result of the collision to a base station.. . ... Ntt Docomo Inc

06/29/17 / #20170188040

Moving picture encoding apparatus, moving picture decoding apparatus, moving picture encoding method, moving picture decoding method, moving picture encoding program, and moving picture decoding program

An object of the present invention is to increase efficiency of information compression in coding and decoding. A moving picture encoding apparatus 10 of the present invention has a motion vector predicting part for performing, based on a temporal relation among adjacent reference frame images 703a, 703b, 703c referred to for detecting motion vectors of adjacent blocks adjacent to a coding target block, a target reference frame image 702 referred to for detecting a motion vector of the target block, and a target frame image 701 being the frame image of the coding target, or based on time information thereof, a correction of scaling the motion vectors 751a, 751b, 751c of the adjacent blocks on the basis of the target reference frame image 702; and a determination of an optimum predicted motion vector based on the motion vectors of the adjacent blocks; and thereby predicting the optimum predicted motion vector after the correction.. ... Ntt Docomo Inc

06/29/17 / #20170187558

User apparatus, interference detection method, base station, and resource allocation method

A user apparatus is provided. The user apparatus includes a cyclic prefix length detection unit configured to detect a cyclic prefix length used by a user apparatus of a neighbor cell or out of coverage; and an interference detection unit configured to detect interference caused by a cyclic prefix length difference, a synchronization timing difference, or collision of resources used for signal transmission. ... Ntt Docomo Inc

06/22/17 / #20170181175

Receiver, transmitter and radio communication method

Provided are a receiver, a transmitter and a radio communication method capable of using non-orthogonal multiple access while suppressing cost increase and processing delay. A mobile station [200a] includes a physical channel segmentation unit [210] and data modulating/decoding units [220]. ... Ntt Docomo Inc

06/22/17 / #20170181057

User terminal, a radio base station and radio communication method

In a radio communications system in which a small cell that uses an unlicensed band is arranged to geographically overlap a macro cell that uses a licensed band, a user terminal has an identity acquiring section that acquires an identity that is formed based on a first identity, which is a predetermined sequence used to specify cells, and a second identity, by using a downlink signal transmitted from one of a macro base station that forms the macro cell and a small base station that forms the small cell, a generating section that generates an uplink signal using the identity, and a transmission section that transmits the uplink signal to the small base station. Thus, the overall system performance in a radio communications system in which small cells to use unlicensed bands are arranged is prevented from decreasing.. ... Ntt Docomo Inc

06/22/17 / #20170180751

Video prediction encoding device, video prediction encoding method, video prediction decoding device and video prediction decoding method

A decoding device includes a decoder that decodes information of a direction of intra-picture prediction of a target block and compression data of a residual signal, a prediction signal generator that generates an intra-picture prediction signal using the information of the direction and an previously reconstructed reference sample of an adjacent block, a residual signal restorator that restores a reconstructed residual signal of the target block, and a block storage that restores and stores a pixel signal of the target block. The prediction signal generator derives reference samples from a previously reconstructed block neighbouring the target block stored, selects two or more key reference samples, performs an interpolation process between the key reference samples for generating interpolated reference samples, and generates the intra-picture prediction signal by extrapolating the interpolated reference samples based on the direction of the intra-picture prediction.. ... Ntt Docomo Inc

06/22/17 / #20170180750

Video prediction encoding device, video prediction encoding method, video prediction decoding device and video prediction decoding method

A decoding device includes a decoder that decodes information of a direction of intra-picture prediction of a target block and compression data of a residual signal, a prediction signal generator that generates an intra-picture prediction signal using the information of the direction and an previously reconstructed reference sample of an adjacent block, a residual signal restorator that restores a reconstructed residual signal of the target block, and a block storage that restores and stores a pixel signal of the target block. The prediction signal generator derives reference samples from a previously reconstructed block neighbouring the target block stored, selects two or more key reference samples, performs an interpolation process between the key reference samples for generating interpolated reference samples, and generates the intra-picture prediction signal by extrapolating the interpolated reference samples based on the direction of the intra-picture prediction.. ... Ntt Docomo Inc

06/15/17 / #20170171905

User equipment and base station

Techniques are disclosed for implementing efficient transmission of uplink packets when the uplink transmission direction is changed in a split bearer. One aspect of the present invention relates to user equipment, comprising: a transmission and reception unit configured to communicate with a master base station and a secondary base station simultaneously in dual connectivity; an rlc (radio link control) layer processing unit configured to have an rlc layer for the master base station and an rlc layer for the secondary base station; and a pdcp (packet data convergence protocol) layer processing unit configured to have a poop layer transmitting and receiving data to/from the rlc layer for the master base station and the rlc layer for the secondary base station, wherein when a transmission direction of uplink data packets is changed in the split bearer configured for the master base station and the secondary base station, the rlc layer processing unit performs re-establishment on the rlc layer for the master base station and the rlc layer for the secondary base station, and the pdcp layer processing unit performs re-establishment on the pdcp layer.. ... Ntt Docomo Inc

06/15/17 / #20170171843

Base station apparatus, mobile terminal apparatus and communication control method

A base station apparatus capable of transmitting a downlink transmission frame at transmission timing different from another base station apparatus is provided. The base station apparatus includes a blank resource setting section that sets, as a blank resource, a resource corresponding to a downlink control channel included in a downlink transmission frame transmitted from the other base station apparatus, a user data assigning section that assigns user data to the downlink transmission frame while avoiding the blank resource, and a transmission section that transmits the downlink transmission frame assigned the user data to a mobile terminal apparatus.. ... Ntt Docomo Inc

06/15/17 / #20170171825

User terminal and radio communication method

The present invention is designed to adequately allocate power to the prach in dual connectivity. A user terminal communicates with a plurality of cell groups, each cell group being comprised of one or more cells that use different frequencies, and this user terminal has a transmission section that transmits a physical random access channel (prach) in a random access procedure, and a power control section that executes power control for transmitting the prach, and when the transmission power required for the prach to transmit to a master base station exceeds a threshold, the power control section executes control to stop uplink transmission to a secondary base station.. ... Ntt Docomo Inc

06/08/17 / #20170164410

User terminal, radio communication system and radio communication method

The present invention is designed to adequately allocate power to prachs in dual connectivity. A user terminal communicates by using a first cell group (cg) and a second cg, and has a power control section that controls ul transmission power for the first cg and the second cg, and a transmission section that transmits at least a physical random access channel (prach), and, when the transmission section retransmits the prach in a primary cell of the first cg, the power control section applies control so that power is preferentially allocated to the retransmission of the prach over transmission in the second cg.. ... Ntt Docomo Inc

06/08/17 / #20170164408

User terminal, radio communication method and radio communication system

The present invention is designed to reduce the decrease of system throughput in a radio communication system to use dual connectivity. According to one aspect of the present invention, a user terminal communicates with a plurality of radio base stations that each configure a cell group comprised of one or more cells, and this user terminal has a transmission section that transmits ul signals in each cell group, and a control section that controls the transmission power of ul signals, and the control section controls the total power of the transmission power of a first prach for a master base station and the transmission power of a second prach for a secondary base station, which are transmitted at the same time from the transmission section, to be equal to or lower than the maximum possible transmission power, by lowering the transmission power of the second prach.. ... Ntt Docomo Inc

06/08/17 / #20170164356

User terminal and radio communication method

A user terminal includes a transmission section that transmits channels using a first cell and a second cell that belong to different cell groups, and a control section that, when a channel to be transmitted in the first cell and a channel to be transmitted in the second cell are same channels and channel transmission in the first cell overlaps at least partially in time with channel transmission in the second cell, preferentially allocates transmission power to one of the channel transmission in the first cell and the channel transmission in the second cell over the other.. . ... Ntt Docomo Inc

06/08/17 / #20170164346

User equipment

From a base station, a user equipment receives a mixed data signal transmitted in a format in which multiple data signals are transmitted with different downlink transmission powers such that the multiple data signals are not orthogonal to each other, multiple control signals corresponding to multiple user equipments, and information indicating an identifier of another user equipment. The user equipment determines an aggregation level of the subject user equipment. ... Ntt Docomo Inc

06/08/17 / #20170164303

Transmission power control method and base station

A transmission power control method in a mobile communication system including a user apparatus and a base station is provided. The method enables the base station to control transmission power of a discovery signal of the user apparatus. ... Ntt Docomo Inc

06/08/17 / #20170164222

User terminal and communication method

A user terminal includes a receiving section that receives a discovery signal transmitted from a radio base station and a measurement section that makes measurement using the discovery signal when the receiving section receives a control signal indicating transmission of the discovery signal. The discovery signal has a longer transmission cycle than a rel. ... Ntt Docomo Inc

06/08/17 / #20170163365

Base station and user equipment

A base station allocates downlink transmission powers to user equipments according to the reception qualities of the user equipments. The base station transmits a mixed data signal in which multiple data signals that are addressed to multiple user equipments and are not orthogonal to each other are mixed, and transmits multiple control signals to the multiple user equipments such that each user equipment can decode the data signal addressed to that user equipment using the control signal corresponding to that user equipment. ... Ntt Docomo Inc

06/08/17 / #20170163320

Base station apparatus, user terminal, communication system and communication control method

The present invention is designed to provide a base station apparatus, a user terminal, a communication system and a communication control method that can support the diversification of communication. In a base station apparatus, downlink measurement object signals are pre-coded using precoding weights that are specific to a user terminal, and transmitted to the user terminal, and, in the user terminal, the downlink measurement object signals are demodulated using the precoding weights that are specific to the user terminal, and measurement processes are performed based on the demodulated downlink measurement object signals.. ... Ntt Docomo Inc

06/01/17 / #20170156075

Radio base station, user terminal and radio communication system

In order to prevent, in an laa system supporting lbt, reduction in resource usage of the system, the present invention provides a radio base station that communicates with a user terminal capable of using a licensed band and unlicensed band. The radio base station comprises: an obtaining section that obtains information about an available time resource amount that is determined based on a result of lbt (listen before talk) in the unlicensed band; and a control section that controls communication with the user terminal in the unlicensed band based on the information about the available time resource amount.. ... Ntt Docomo Inc

05/18/17 / #20170142764

User equipment apparatus and signal reception method

A user equipment apparatus for performing user equipment-to-user equipment communication includes a synchronization signal detection unit configured to detect a user equipment-to-user equipment synchronization signal transmitted from a user equipment apparatus in another cell or another carrier; a control unit configured to set reception timing based on the user equipment-to-user equipment synchronization signal; and a reception unit configured to receive scheduling information or a discovery signal transmitted from the user equipment apparatus in the other cell or the other carrier within a time window defined based on the user equipment-to-user equipment synchronization signal.. . ... Ntt Docomo Inc

05/18/17 / #20170142668

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

The present invention is designed so that user terminal operations are carried out adequately when guaranteed transmission power is configured in dual connectivity. A user terminal communicates with a plurality of cell groups, where each cell group is comprised of one or more cells that use different frequencies, and has a receiving section that receives the guaranteed transmission power value of each cell and active/non-active information of the cells in the cell groups, and a power control section that controls the guaranteed transmission power values of the cell groups by using the number of cells in the active state and the guaranteed transmission power value of each cell.. ... Ntt Docomo Inc

05/18/17 / #20170142667

User terminal, radio base station and radio communication method

The present invention is designed to reduce the decrease of uplink throughput in the event a user terminal connects with a plurality of radio base stations. A user terminal (20) according to an example of the present invention provides a user terminal to connect with a plurality of radio base stations including at least a first radio base station and a second radio base station, and this user terminal has a ph report generating section (411) that calculates the ph (power headroom) of each radio base station and generates ph reports, and a transmission section (203) that transmits either the pusch (physical uplink shared channel) bandwidth of the first radio base station, a ph report per resource block, or information about the transmission power density, and a ph report for the first radio base station, to the second radio base station.. ... Ntt Docomo Inc

05/18/17 / #20170141907

Base station, user terminal, radio communication system, and communication control method

A radio communication system includes one or more user terminals and one or more base stations that execute time division radio communication using a time division duplex (tdd) system. A radio frame is a radio communication resource used in the time division radio communication, and includes a downlink subframe that is a transmission period of a downlink signal, a special subframe including a guard period that is used neither for transmission of a downlink signal nor for transmission of an uplink signal, and an extended subframe that is used as either a transmission period of a downlink signal or a transmission period of an uplink signal, in accordance with a scheduling by the base station.. ... Ntt Docomo Inc

05/11/17 / #20170135039

User terminal, base station and communication method

The present invention is designed to reduce the delay time which a small cell takes before starting transmitting data to a user terminal. A user terminal according to the present invention has a measurement section that, when the state of connection with the small base station is a deactivated state, periodically measures channel state information, by using a channel state information reference signal that is transmitted from the small base station, and a monitoring section that, when the state of connection is the deactivated state, periodically monitors a downlink control channel that is transmitted from the small base station, wherein, when downlink control information for the user terminal is detected by the periodic monitoring of the downlink control channel, the state of connection is switched from the deactivated state to an activated state.. ... Ntt Docomo Inc

05/11/17 / #20170134976

User apparatus, base station, and time difference information notification method

A user apparatus for use in a mobile communication system including a first base station and a second base station that communicate with the user apparatus by inter-base station carrier aggregation, including: measurement means configured to measure a time difference between a subframe in the first base station and a subframe in the second base station; and notification means configured, when detecting a predetermined notification trigger, to notify the first base station or the second base station of time difference information on the time difference measured by the measurement means.. . ... Ntt Docomo Inc

05/11/17 / #20170134733

Mode identification data reducing method for intra-prediction coding

A predictive coding system performs predictive encoding by determination of an optimum prediction mode from prediction methods for a pixel signal of a target block. A predicted signal is generated according to the determined mode, and a residual signal is determined. ... Ntt Docomo Inc

05/04/17 / #20170127389

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

A radio communication method for a radio base station, apparatus that controls transmission of an aperiodic srs (sounding reference signal) by a mobile terminal apparatus is described. The radio communication method includes selecting a specific bit information piece to report to the mobile terminal apparatus, from a table having four bit in formation pieces including one bit information piece to indicate not to trigger the aperiodic srs and three bit information pieces to indicate to transmit the aperiodic srs using first to third default srs parameters respectively, the four bit information pieces all being defined in a 2-bit bit field in downlink control information to be transmitted in one subframe, and transmitting, to the mobile terminal apparatus; the first to third default srs parameters by higher layers and the specific bit information piece by a downlink control channel.. ... Ntt Docomo Inc

05/04/17 / #20170127328

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

05/04/17 / #20170127083

Image predictive encoding and decoding system

In image predictive encoding according to an embodiment, one or more motion information sets are derived from plural pieces of motion information stored in a computer readable storage medium. Each of the one or more information sets includes two pieces of motion information between which any one of constituent elements differ in value. ... Ntt Docomo Inc

05/04/17 / #20170123847

Control node, node creation system and node creation method

A controller includes circuitry configured to: receive a creation instruction to create a target node; transmit identification information of the target node included in the creation instruction to a cookbook and receive target node configuration information including identification information and a scenario of a plurality of functional blocks (fbs) as a response based on the transmission; transmit an arrangement instruction to arrange the plurality of fbs in combination, including the identification information of the plurality of fbs included in target node configuration information, to a repository that stores fbs or a platform in which the target node is arranged; and transmit a setting instruction to set a scenario included in the target node configuration information to the plurality of fbs arranged based on the arrangement instruction.. . ... Ntt Docomo Inc

04/27/17 / #20170118776

Radio communication terminal, radio base station and radio communication method

The present invention is designed to realize rach traffic off-loading. A radio communication terminal communicates with a radio base station by using a carrier that is different from the connecting carrier and includes an unlicensed band, and has a transmission section that transmits a cross-carrier rach in the carrier including the unlicensed band, and a receiving section that receive a random access response that is transmitted from the radio base station having received the cross-carrier rach.. ... Ntt Docomo Inc

04/27/17 / #20170118728

User terminal, radio base station and radio communication method

The present invention is designed to apply ul transmission control adequately in a radio communication system which runs lte in an unlicensed band (lte-u). A user terminal communicates with a radio base station by using a licensed band and an unlicensed band, and has a detection section that detects a signal transmitted from another transmission point in the unlicensed band, a control section that controls transmission of a ul signal in the unlicensed band based on a ul transmission command transmitted from the radio base station and the detection result in the detection section, and a transmission section that transmits the ul signal, and the transmission section transmits information related to the detection result to the radio base station by using the licensed band.. ... Ntt Docomo Inc

04/27/17 / #20170118684

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

04/27/17 / #20170117000

Audio decoding device, audio encoding device, audio decoding method, audio encoding method, audio decoding program, and audio encoding program

The purpose of the present invention is to reduce distortion a frequency band component encoded with a small number of bits in a time domain and improve quality. An audio decoding device decodes an encoded audio signal and outputs the audio signal. ... Ntt Docomo Inc

04/20/17 / #20170111922

Base station and user equipment

Techniques are disclosed for implementing lbt in coordinated communication for inter-cell interference control. One aspect of the present invention relates to a base station, including a communication control unit configured to schedule radio resources of a cell for user equipment and a frequency usage detection unit configured to perform listen before talk (lbt) in a limited partial frequency band corresponding to the scheduled radio resources in a whole frequency band of the cell, wherein if it is determined that the partial frequency band is not used, the communication control unit performs downlink transmission to the user equipment.. ... Ntt Docomo Inc

04/20/17 / #20170111911

User apparatus, base station, uplink data dividing ratio calculation method, and uplink data dividing ratio providing method

A user apparatus in a mobile communication system including a first base station and a second base station which perform communications with the user apparatus by inter-base-station carrier aggregation, includes a radio-quality obtaining unit for obtaining first radio-quality between the user apparatus and the first base station, second radio-quality between the user apparatus and the second base station; a load-information obtaining unit for obtaining first load-information in the first base station and second load-information in the second base station; and a ratio calculation unit for calculating a dividing ratio used by the user apparatus for dividing uplink data and transmitting the divided data to the first base station and the second base station by using the first radio-quality and the second radio-quality obtained by the radio quality obtaining unit and the first load-information and the second load-information obtained by the load-information obtaining unit.. . ... Ntt Docomo Inc

04/20/17 / #20170111874

Radio base station, user terminal and radio communication method

The present invention is designed to reduce mutual interference and furthermore prevent the decrease of throughput in a radio communication system (lte-u) to operate lte in an unlicensed band. A radio base station communicates with a user terminal by using an unlicensed band, and has a detection section that detects signals transmitted from other transmission points in the unlicensed band, a power control section that controls dl transmission power to apply to the unlicensed band based on detection results in the detection section, and a transmission section that transmits signals by using the dl transmission power determined in the power control section, and, in this radio base station, control is executed so that information related to the dl transmission power is reported to the user terminal.. ... Ntt Docomo Inc

04/20/17 / #20170111873

User terminal, radio base station and radio communication method

The present invention is designed to adequately execute transmission power control in dual connectivity (dc). A user terminal communicates with a plurality of cell groups, each cell group being comprised of one or more cells that use different frequencies, and has a power control section that controls the maximum transmission power value for each cell group, which is given by splitting the allowable maximum transmission power of the subject user terminal semi-statically, and controls the maximum transmission power value of a specific cell group to be changed when a predetermined condition is met, and a transmission section that reports the maximum transmission power value after the change to a radio base station forming the cell group.. ... Ntt Docomo Inc

04/20/17 / #20170111263

Communication system, route selection apparatus, and route selection method

A communication system in which a plurality of communication networks are interconnected, the communication system including a plurality of inter-communication network connections that include an inter-communication network connection by a first circuit performing communication by a first protocol and an inter-communication network connection by a second circuit performing communication by a second protocol, including: a route selection apparatus that is provided in a communication network that is connected to another communication network by the first circuit, and that is connected to another communication network by the second circuit; and an address resolution apparatus that can communicate with the route selection apparatus, wherein the route selection apparatus sends an inquiry to the address resolution apparatus about an address corresponding to an incoming number in a connection request signal transmitted from a user apparatus in the communication network so as to determine whether to transmit the connection request signal to a communication network of an incoming destination via the first circuit or to transmit the connection request signal to a communication network of an incoming destination via the second circuit based on a response received from the address resolution apparatus.. . ... Ntt Docomo Inc

04/20/17 / #20170111185

Communication system, route selection apparatus, and route selection method

A communication system in which a plurality of communication networks are interconnected, the communication system including a plurality of inter-communication network connections that include an inter-communication network connection by a first circuit performing communication by a first protocol and an inter-communication network connection by a second circuit performing communication by a second protocol, including: a route selection apparatus that is provided in a communication network that is connected to another communication network by the first circuit, and that is connected to another communication network by the second circuit; and a connection determination apparatus that is provided in a first circuit connection network that is the other communication network connected with the communication network by the first circuit, wherein, when the route selection apparatus receives a connection request signal transmitted from a user apparatus in the communication network, the route selection apparatus transmits the connection request signal to the first circuit connection network, and wherein, when the route selection apparatus receives a connection failure signal, from the connection determination apparatus, indicating that an incoming destination of the connection request signal is not a user apparatus of the first circuit connection network, the route selection apparatus transmits the connection request signal to a communication network of an incoming destination via the second circuit.. . ... Ntt Docomo Inc

04/13/17 / #20170104994

Image prediction encoding device, image prediction decoding device, image prediction encoding method, image prediction decoding method, image prediction encoding program, and image prediction decoding program

The image predictive encoding device 10 comprises an intra frame predictive signal generation method determination section 15 which determines, for adjacent areas comprising regenerated pixel signals and adjacent to the target area, a predictive method which is derived on the basis of data corresponding to the adjacent areas as an r mode predictive method or an l mode predictive method, an intra frame predictive signal generation section 16 which generates an intra frame predictive signal on the basis of the r mode predictive method thus determined, and a subtractor 18, a transform section 19, a quantization section 20, and an entropy encoding section 25 which encode a residual signal of a pixel signal of the target area on the basis of the generated intra frame predictive signal.. . ... Ntt Docomo Inc

04/13/17 / #20170104517

Beam selecting method, base station, and user equipment

A beam selection method in a mobile communication system including a base station with multiple antennas and user equipment conducting radio communication with the base station includes the steps of, at the base station, detecting a direction in which the user equipment is located, transmitting precoded reference signals toward the detected direction by spatial multiplexing using same frequency and time resources, and determining a beam for the user equipment based upon feedback information from the user equipment.. . ... Ntt Docomo Inc

04/06/17 / #20170099635

User terminal, radio base station and radio communication method

The present invention is designed to reduce the power consumption of user terminals more in comparison to conventional drx control. The present invention provides a receiving section, which receives a dl signal including at least a ul grant, and a drx control section, which controls the discontinuous reception operations, and the drx control section, when receiving the dl signal including a ul grant, controls the discontinuous reception operations based on the drx transition command information that is included in the dl signal. ... Ntt Docomo Inc

04/06/17 / #20170099486

Image predictive encoding and decoding device

An image predictive encoding device can efficiently encode an image, while suppressing an increase in prediction information and reducing the prediction error of a target block. In an image predictive encoding device, according to one embodiment, to produce a prediction signal of a partition in a target region, it is decided whether prediction information of a neighbouring region can be used. ... Ntt Docomo Inc

04/06/17 / #20170099121

User equipment and radio communication method

Decoding control techniques are disclosed for achieving low latency communication. One aspect of the present invention relates to user equipment, comprising: a carrier aggregation control unit configured to control carrier aggregation communication with a base station; and a mac processing unit configured to configure harq sharing to manage multiple harq processes configured for component carriers in the carrier aggregation communication as common harq processes.. ... Ntt Docomo Inc

04/06/17 / #20170099092

Base station and user equipment

The present disclosure relates to techniques for implementing efficient beam forming in 3d mimo. One aspect of the present invention relates to abase station, comprising: a beam forming unit configured to form multiple directional beams in accordance with a predetermined beam arrangement; a transmission and reception unit configured to transmit reference signals in the formed multiple directional beams; and a feedback information acquisition unit configured to acquire feedback information from user equipment receiving the reference signals.. ... Ntt Docomo Inc

03/30/17 / #20170094702

User apparatus, and signal transmission and reception method

A user apparatus that performs d2d communication by radio includes a signal transmission unit configured to transmit a signal including a destination identifier of a physical layer associated with a destination identifier of an upper layer which is a layer higher than the physical layer; and a signal reception unit configured to detect a signal addressed to the user apparatus by detecting an identifier, of the physical layer of the user apparatus, that is associated with an identifier of the upper layer of the user apparatus from a signal received by radio.. . ... Ntt Docomo Inc

03/30/17 / #20170094681

Radio base station, user terminal and radio communication system

A radio base station is disclosed to communicate with a user terminal that is capable of using a licensed band and an unlicensed band and has a control section that controls the transmission of downlink signals in the unlicensed band using lbt (listen before talk), a selection section that selects the symbol to execute lbt, randomly, with equal probability, from a plurality of candidate symbols, and an acquiring section that acquires a measurement result, in which the received signal intensity in the lbt period is measured, wherein when the control section judges that the channel of the unlicensed band is in an idle state from the measurement result of received signal intensity, the control section executes control so that a beacon reference signal is transmitted in all of the candidate symbols that follow the symbol in which lbt was executed.. . ... Ntt Docomo Inc

03/30/17 / #20170094645

Mobile communication method and mobile station

A mobile communication method includes the steps of transmitting a first control signal including an identifier different from a c-rnti to the mobile station ue#a through a fdcch by a radio base station phnb#10 managing a cell #10 formed by linking multiple small cells, transmitting a second control signal including an identifier to the mobile station ue through a pdcch by a radio base station enb#1 managing a cell #1 having a coverage area overlapping with a coverage area of the cell #10, and regarding the first control signal as valid by the mobile station ue#a, when it determines that the identifier included in the first control signal and the identifier included in the second control signal match each other.. . ... Ntt Docomo Inc

03/30/17 / #20170094531

Mobile communication system, base station, and user equipment

In a mobile communication system including a base station provided with a plurality of antenna ports, and user equipment that executes radio communication with the base station, the base station transmits a beam stream including a first beam for transmitting data to the user equipment, and one or more second beams for transmitting a precoded reference signal in a direction toward a vicinity of the first beam; and upon receiving the beam stream, the user equipment selects, from the first beam and the second beam, and transmits, to the base station, one or more suitable beam indexes.. . ... Ntt Docomo Inc

03/30/17 / #20170094528

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

A user terminal that can communicate with a radio base station by using a licensed band and an unlicensed band is disclosed. The user terminal includes a receiving section that receives downlink signals transmitted in the licensed band and the unlicensed band, a measurement section that measures a downlink signal transmitted in the unlicensed band, and a control section that controls feedback of a measurement result. ... Ntt Docomo Inc

03/23/17 / #20170086175

Radio base station, user terminal and radio communication method

A radio base station is disclosed. The radio base station includes a transmitting/receiving section that carries out transmission and reception with a user terminal by using frequency-divisioned paired bands, a control section that applies control so that ul communication and dl communication are carried out in at least one band of the paired bands, and a generating section that generates downlink control signals to control ul communication and dl communication in the one band. ... Ntt Docomo Inc

03/23/17 / #20170086170

User terminal, radio base station and radio communication method

The present invention is designed to improve throughput when ca is executed between multiple cells including a tdd cell. A user terminal carries out radio communication with a plurality of cells by employing carrier aggregation, and has a receiving section that, when a connection is established with a tdd cell, receives information about a predetermined dl/ul configuration that is selected from a plurality of dl/ul configurations, and a control section that controls transmission and reception to and from the tdd cell based on the predetermined dl/ul configuration received, and a dl/ul configuration to carry out dl communication in all subframes is included as one in the plurality of dl/ul configurations, and the control section uses the dl/ul configuration to carry out dl communication in all subframes as one of the dl/ul configurations only when the connecting tdd cell is a secondary cell.. ... Ntt Docomo Inc

03/23/17 / #20170086149

User terminal, radio base station and radio communication method

The present invention is designed to reduce the decrease of uplink throughput in the event a user terminal connects with a plurality of radio base stations. A user terminal (20) according to an example of the present invention provides a user terminal that connects with a plurality of radio base stations (10) including a first radio base station and a second radio base station, and this user terminal has a transmission section (203) that transmits uplink signals of a plurality of types to each radio base station, and a control section (401) that controls the transmission power of the uplink signals based on the priorities of the uplink signals for each radio base station, and, every time there are uplink signals of the same type, the control section configures the priority for the first radio base station higher than the priority for the second radio base station.. ... Ntt Docomo Inc

03/23/17 / #20170085333

Receiver, transmitter and radio communication method

Provided are a receiver, a transmitter and a radio communication method capable of using non-orthogonal multiple access while suppressing cost increase and processing delay. A mobile station 200a receives non-orthogonal signals, also receives a reference signal to be used for interference cancellation, and extracts the non-orthogonal signal addressed to the mobile station 200a from the received non-orthogonal signals by demodulating and cancelling the radio signal addressed to another mobile station. ... Ntt Docomo Inc

03/23/17 / #20170084100

Locking control device, locking control system, and locking control method

In a coin-operated locker, a short-range wireless communication unit receives uim information, which is information for connection to a mobile communication network, from a wearable device by short-range wireless communication. A server communication unit communicates with an authentication server that holds authentication-relevant information by mobile communication using the uim information. ... Ntt Docomo Inc

03/16/17 / #20170079015

User equipment and uplink data transmission method

User equipment having a dual connectivity function to communicate with multiple base stations simultaneously includes a transmission buffer configured to store uplink data for transmission, a buffer status management unit configured to manage a data amount stored in the transmission buffer, and a transmission control unit configured to receive splitting trigger information indicative of a threshold for the data amount stored in the transmission buffer and a first base station to transmit the uplink data stored in the transmission buffer when the stored data amount is smaller than or equal to the threshold and select a base station to transmit the uplink data stored in the transmission buffer from the multiple base stations depending on whether the data amount stored in the transmission buffer is smaller than or equal to the threshold.. . ... Ntt Docomo Inc

03/16/17 / #20170078975

User terminal, radio base station and radio communication method

The present invention is designed so that, when a user terminal connects with a plurality of radio base stations, the decrease of uplink throughput is reduced. A user terminal according to an example of the present invention provides a user terminal (20) that connects with a plurality of radio base stations (10) including a first radio base station and a second radio base station, and this user terminal has a transmission section (203) that transmits uplink signals to each radio base station, a receiving section (203) that receives terminal-specific information with respect to the first radio base station, related to the maximum transmission power of the uplink signals, and a maximum transmission power setting section (406) that sets the maximum transmission power for the first radio base station based on the terminal-specific information with respect to the first radio base station.. ... Ntt Docomo Inc

03/16/17 / #20170078973

Base station

Some ofdm symbols transmitted temporally continuously by a base station include data signals that are not orthogonal to each other and are directed to user devices. A reference signal is arranged in the ofdm symbols temporally intermittently. ... Ntt Docomo Inc

03/16/17 / #20170078949

User apparatus, communication control apparatus, and origination rejection control method

A user apparatus for use in a mobile communication network that supports a plurality of radio access technologies, including: a reception unit configured, when an origination request transmitted to the mobile communication network from the user apparatus that uses a first radio access technology is rejected, to receive an origination rejection signal including a timer value and an operation instruction from the mobile communication network; and an operation control unit configured to perform inhibition of re-origination based on the timer value included in the origination rejection signal that is received by the reception unit, wherein, in a case where the user apparatus changes a using radio access technology from the first radio access technology to a second radio access technology, the operation control unit determines whether to inhibit re-origination based on the operation instruction included in the origination rejection signal.. . ... Ntt Docomo Inc

03/16/17 / #20170078939

User apparatus, base station, cell selection control method, and parameter transmission method

A user apparatus in a mobile communication system including a base station and the user apparatus, including: reception means that receives, from the base station, a parameter for all symbols that is used when performing cell selection processing or cell reselection processing based on all symbol signal reception quality that is signal reception quality based on measurement in all ofdm symbols; and cell selection control means that performs measurement of the all symbol signal reception quality, and performs cell selection processing or cell reselection processing by using a result of the measurement and the parameter for all symbols received by the reception means.. . ... Ntt Docomo Inc

03/16/17 / #20170078061

Radio base station, user terminal and radio communication method

A radio base station that communicates with a user terminal, and has a control section that executes control so that signals are time-division-multiplexed over a first radio resource region where symbols are multiplexed at a rate equal to or below a nyquist rate and a second radio resource region where symbols are multiplexed at a faster rate than the nyquist rate. The radio base station also includes a transmission section that transmits the signals that are time-division-multiplexed in the first radio resource region and the second radio resource region, to the user terminal to reduce the interference against predetermined signals in a radio communication system in which faster-than-nyquist (ftn) is used.. ... Ntt Docomo Inc

03/16/17 / #20170078057

Mobile communication method and radio base station

Transmission/reception timing of a data signal and a control signal through a uu interface and transmission/reception timing of the data signal through a ud interface are properly adjusted. A mobile communication method according to the present invention includes: a step a in which a radio base station enb notifies a mobile station ue#1 and a mobile station ue#2 that an opportunity to transmit and receive the data signal through the ud interface is allocated through a pdcch in which an x-rnti is used; and a step b in which the radio base station enb transmit “direction information”, for notifying of a direction in which the data signal should be transmitted in the opportunity, to the mobile station ue#1 and the mobile station ue#2.. ... Ntt Docomo Inc

03/16/17 / #20170076729

Audio encoding device, method and program, and audio decoding device, method and program

An audio packet error concealment system includes an encoding unit for encoding an audio signal consisting of a plurality of frames, and an auxiliary information encoding unit for estimating and encoding auxiliary information about a temporal change of power of the audio signal. The auxiliary information is used in packet loss concealment in decoding of the audio signal. ... Ntt Docomo Inc

03/09/17 / #20170070985

User apparatus and uplink transmission timing control method

A user apparatus includes a signal transmission unit configured to transmit an uplink signal, a signal reception unit configured to receive a downlink signal; and a timing adjustment unit configured to perform timing control for shifting forward transmission timing of the uplink signal on the basis of reception timing of the downlink signal. When there is a secondary cell to which a physical uplink control channel is set in a cell group including secondary cells using a same uplink transmission timing in cells used for the carrier aggregation, the timing adjustment unit performs the timing control on the cell group by using an offset value according to a frame structure of the secondary cell.. ... Ntt Docomo Inc

03/09/17 / #20170070746

Video prediction encoding device, video prediction encoding method, video prediction encoding program, video prediction decoding device, video prediction decoding method, and video prediction decoding program

A predicted signal generation unit provided in a video predictive encoding device estimates a zero-th motion vector for derivation of a zero-th predicted signal, selects a zero-th motion vector predictor similar to the zero-th motion vector, and generates zero-th side information containing a zero-th motion vector predictor index to identify the motion vector predictor and a motion vector difference determined from the zero-th motion vector and the zero-th motion vector predictor. The video predictive encoding device selects a motion vector for generation of a first predicted signal having a high correlation with a target region, generates first side information containing a first motion vector predictor index to identify the motion vector as a first motion vector predictor, sets the first motion vector predictor to a first motion vector, and combines the zero-th and first predicted signals to generate a predicted signal of the target region.. ... Ntt Docomo Inc

03/09/17 / #20170070377

User terminal, radio base station, and radio communication method

A user terminal with a transmission processing section that generates an sc-fdma (single carrier frequency division multiple access) signal by blocking symbols that are arranged in a given time region at a symbol rate equal to or lower than a nyquist rate. The transmission processing section converts the blocks into symbols that are multiplexed in a high density, in block units, in the time domain, by allowing an overlap between the symbols in the blocks. ... Ntt Docomo Inc

03/02/17 / #20170064613

User terminal, base station and radio communication method

The present invention is designed so that small cell detection operations are carried out adequately based on whether or not assist information from the network is present. A user terminal communicates with a base station forming a small cell and a base station forming a macro cell having a coverage area in which the small cell is included, and this user terminal has a receiving section that receives a small cell detection command, which is transmitted from the macro cell and which includes timing information and assist information, a detection section that detects a pss/sss, included in a small cell detection reference signal transmitted from the small cell, in accordance with the timing information, and a measurement section that measures a measurement reference signal, which is included in the small cell detection reference signal, in accordance with the detected pss/sss and the assist information.. ... Ntt Docomo Inc

03/02/17 / #20170064578

User equipment, base station and method

An object of the present invention is to provide techniques for implementing inter-frequency measurement with flexible small gap measurement corresponding to capability of user equipment and/or to-be-measured cells. One aspect of the present invention relates to user equipment for transmitting and receiving radio signals to/from a base station, comprising: a capability information indication unit configured to indicate capability information of the user equipment to the base station; and an inter-frequency measurement unit configured to perform, upon receiving a small gap measurement applied inter-frequency measurement indication from the base station, a small gap measurement applied inter-frequency measurement in accordance with a small gap period for causing communication with the base station to be interrupted and an inter-frequency measurement period indicated in the inter-frequency measurement indication.. ... Ntt Docomo Inc

03/02/17 / #20170064541

User apparatus and base station

A user apparatus includes an information storage unit configured to store band combination information indicating a combination of bands that can be used in carrier aggregation in the user apparatus, and a notification control unit configured to explicitly or implicitly add, to the band combination information, capability information indicating whether the user apparatus is able to set a primary cell by using a band of a first duplex mode in the carrier aggregation, and to notify a base station of the band combination information to which the capability information is added.. . ... Ntt Docomo Inc

02/23/17 / #20170055249

Base station, transmission method, mobile station and retransmission control method

The present invention aims at reducing or avoiding pucch conflict among terminals if a pdsch and a pdcch for indicating assignment information required to receive the pdsch are transmitted in different subframes. One aspect of the present invention relates to a base station for transmitting a physical downlink shared channel and a physical downlink control channel in different subframes, wherein the physical downlink control channel indicates assignment information required to receive the physical downlink shared channel, comprising: a resource assignment information storage unit configured to store resource assignment information for a physical uplink control channel or resource assignment information for a physical downlink control channel; a resource assignment unit configured to assign a resource for the physical downlink control channel with reference to the resource assignment information storage unit such that no conflict arises among physical uplink control channels from multiple mobile stations; and a transmission unit configured to transmit the physical downlink control channel and the physical downlink shared channel.. ... Ntt Docomo Inc

02/23/17 / #20170055172

Mobile station, base station, method of reporting an uplink data amount, and method of allocating a resource to uplink data

A mobile station for performing communication using component carriers which belong to a plurality of base stations includes a reception unit configured to receive configuration information about a scheme of reporting a data amount of uplink data from a base station; a buffer status management unit configured to manage the data amount of uplink data stored in a transmission buffer; a transmission control unit configured to select a base station to which the data amount of uplink data is to be reported according to the configuration information about the scheme of reporting the data amount of uplink data; and a transmission unit configured to report the data amount of uplink data to the selected base station.. . ... Ntt Docomo Inc

02/23/17 / #20170053655

Linear prediction coefficient conversion device and linear prediction coefficient conversion method

The purpose of the present invention is to estimate, with a small amount of computation, a linear prediction synthesis filter after conversion of an internal sampling frequency. A linear prediction coefficient conversion device is a device that converts first linear prediction coefficients calculated at a first sampling frequency to second linear prediction coefficients at a second sampling frequency different from the first sampling frequency, which includes a means for calculating, on the real axis of the unit circle, a power spectrum corresponding to the second linear prediction coefficients at the second sampling frequency based on the first linear prediction coefficients or an equivalent parameter, a means for calculating, on the real axis of the unit circle, autocorrelation coefficients from the power spectrum, and a means for converting the autocorrelation coefficients to the second linear prediction coefficients at the second sampling frequency.. ... Ntt Docomo Inc

02/16/17 / #20170048918

Macro-cell assisted small cell discovery and activation

A method for waking up one or more sleeping small cell base stations in a wireless communication system for serving a user equipment is described. The wireless communication system includes a plurality of small cell base stations and one or more macro base stations. ... Ntt Docomo Inc

02/16/17 / #20170048826

User equipment, base station, communication access method, and communication method

In user equipment for communicating with a base station in a radio communication system including the base station and the user equipment, the user equipment includes a receiver that measures received power of reference signals associated with a plurality of different identification information items, the reference signals being transmitted from the base station, and that selects a specific reference signal based on a measurement result; and a transmitter that transmits a random access signal including a preamble sequence, the preamble sequence corresponding to the identification information item of the reference signal selected by the receiver.. . ... Ntt Docomo Inc

02/16/17 / #20170048809

User apparatus, mobile communication system, and maximum transmission power determination method

A user apparatus in a mobile communication system including a base station and the user apparatus, including: reception means configured to receive, from the base station, first system information including a first maximum transmission power value and a second maximum transmission power value, and second system information including a first signaling value and a second signaling value; and control means configured, when determining that the second signaling value included in the second system information is a value defined as a transmission condition in a cell where the user apparatus resides, to determine the second maximum transmission power value corresponding to the second signaling value as a maximum transmission power value for use in the cell.. . ... Ntt Docomo Inc

02/16/17 / #20170047944

System and method for arithmetic encoding and decoding

An arithmetic encoder is provided for converting an event sequence comprised of a plurality of events to an information sequence comprised of at least one information piece, and includes a core engine for receiving an event of the event sequence, and a probability estimate from a probability estimator, and generating zero or more pieces of the information sequence responsive to the received event and the probability estimate by bounding the ratio of events to information pieces. An arithmetic encoder is provided that is capable of constraining a number of events in at least one event sequence as a function of the number of generated information pieces in at least one information sequence. ... Ntt Docomo Inc

02/09/17 / #20170041865

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, and a control section that selects at least one cell, from the cells where uplink control signals can be allocated, which are configured in each cg, and controls the cell to transmit the uplink control signals. When information to indicate cross-carrier scheduling (ccs) is included in a downlink control signal, the control section decides whether or not the cell having received the downlink control signal and the cell that is designated by the information to indicate ccs belong to the same cg, and selects the cell based on this decision. ... Ntt Docomo Inc

02/02/17 / #20170034870

User apparatus and signal transmission control method

A user apparatus configured to perform discontinuous reception control for discontinuously receiving a signal transmitted from a base station, including: a reception unit configured to receive information, from the base station, specifying a transmission cycle of a control signal in discontinuous reception performed at a predetermined discontinuous reception cycle; and a transmission control unit configured, when performing the discontinuous reception at the predetermined discontinuous reception cycle, to transmit the control signal in an active period in the discontinuous reception at a cycle longer than the discontinuous reception cycle based on the information specifying the transmission cycle.. . ... Ntt Docomo Inc

02/02/17 / #20170034841

Method and apparatus for scheduling, load balancing, and pilot-assignments in reciprocity-based mimo cellular deployments

A method and apparatus is disclosed herein for scheduling, load balancing and/or pilot assignment in mimd cellular deployments (e.g., reciprority-based mimo cellular deployments). In one embodiment, the method comprises receiving, by the central controller from at least one ap, for at least one user terminal, a size of a user set and user rate information indicative of a rate that can be provided to the user terminal when served in a group of one or more user terminals; and determining, by the central controller, based on user rate information and the user set size, an allocation of ap resources among the user terminals for the at least one. ... Ntt Docomo Inc

02/02/17 / #20170034825

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

A user terminal that is capable of transmitting and receiving device-to-device signals, and has a receiving section that receives system information, which is transmitted from the connecting or serving radio base station and contains at least information about the resources for transmitting and receiving the device-to-device signals, and a control section that, based on the information about the device-to-device signal transmitting/receiving resources, executes control so that the device-to-device signals are transmitted and received in a second frequency carrier, which is different from a first frequency carrier, in which the information about the device-to-device signal transmitting/receiving resources is transmitted. Thus, the increase of power consumption in d2d terminals is prevented even when a frequency carrier that does not have an expanded coverage is used as a d2d signal transmitting/receiving resource where d2d operations are executed in a network in which multiple frequencies are in use.. ... Ntt Docomo Inc

02/02/17 / #20170034793

User apparatus, base station, uplink transmission power reporting method and parameter notification method

A user apparatus in a mobile communication system includes a first and second base station that perform communication with the user apparatus by inter-base station carrier aggregation. The user apparatus receives, from the first base station, a first detection parameter on uplink transmission power reporting set for a first cell group that is a cell group of the first base station. ... Ntt Docomo Inc

02/02/17 / #20170034788

User apparatus and uplink transmission power information transmission method

A user apparatus in a mobile communication system including a first base station and a second base station that perform communication with the user apparatus by inter-base station carrier aggregation, including: a transmission trigger detection unit configured to detect a transmission trigger for transmitting uplink transmission power information in the user apparatus to the first base station or to the second base station; and an uplink transmission power information transmission unit configured to transmit the uplink transmission power information to the first base station or to the second base station based on a transmission trigger detected by the transmission trigger detection unit.. . ... Ntt Docomo Inc

02/02/17 / #20170034709

Measurement control method and base station

A measurement control method in a mobile communication system is provided. The mobile communication system includes a first base station and a second base station which perform communications with a user apparatus by using inter-base-station carrier aggregation. ... Ntt Docomo Inc

02/02/17 / #20170034531

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

02/02/17 / #20170033948

Inter-network connection control device, and connection control method

An inter-network connection control device that is used for interconnecting a communication network and another communication network includes a request signal forwarding unit that forwards a connection request signal transmitted from originating user equipment in the communication network to the other communication network, and a response signal processor that receives, from the other communication network, a plurality of response signals with respect to the connection request signal, the plurality of response signals being forked in the other communication network receiving the connection request signal and being forwarded to a plurality of terminating user devices, and that forwards one response signal of the plurality of response signals to the originating user equipment.. . ... Ntt Docomo Inc

01/26/17 / #20170026774

Communication system, service control device, mtc user device, gateway device, and communication method

In a communication system 10, an in-cse 200 maps and retains a public ip address acquired from an mtc-ue 100 and an ue-id, and receives an incoming message addressed to the mtc-ue 100 from an as 40a. The in-cse 200, upon receiving the incoming message, sets the public ip address mapped with the retained ue-id in a destination address, and delivers to a ggsn/pgw 310 an ip packet containing the corresponding ue-id. ... Ntt Docomo Inc

01/26/17 / #20170026661

Enhanced intra-prediction coding using planar representations

The present invention provides low complexity planar mode coding in which a value of a bottom-right pixel in a prediction block is calculated from a value of at least one pixel in at least one of an array of horizontal boundary pixels and an array of vertical boundary pixels. Linear and bi-linear interpolations on the value of the bottom-right pixel and values of at least some of the horizontal and vertical boundary pixels to derive values of remaining pixels in the prediction block. ... Ntt Docomo Inc

01/19/17 / #20170019838

User terminal, radio base station and radio communication method

In order that a user terminal properly identifies a connection cell in a radio communication system (lte-u) for operating lte in an unlicensed band, a user terminal for communicating with a radio base station in an unlicensed band is provided with a detection section that detects a synchronization signal transmitted from a radio base station using a dummy cell id used in common among a plurality of radio base stations, an estimation section that performs channel estimation using a reference signal, and a reception processing section that performs reception processing of system information transmitted from a radio base station using a channel estimation result.. . ... Ntt Docomo Inc

01/19/17 / #20170019257

Information delivery system, information delivery method, short-range communication device, information delivery apparatus, and server

A wearable device generates a temporary id, generates an encrypted user id, and transmits the temporary id and the encrypted user id to a shop system. The shop system receives the temporary id and the encrypted user id, transmits a temporary id corresponding to the received temporary id and the encrypted user id to a server, and transmits the temporary id transmitted by an identifier transmission unit and waiting state information to the server. ... Ntt Docomo Inc

01/12/17 / #20170013673

Mobile communication system and user equipment

In tdd-fdd carrier aggregation, delay in downlink retransmission timing and ue's battery energy consumption are reduced. In a mobile communication system that performs carrier aggregation using a first component carrier associated with a first cell conducting radio communication in a first duplex mode and a second component carrier associated with a second cell conducting radio communication in a second duplex mode, a cell is provided on which an uplink control channel carrying acknowledgement or negative acknowledgement for the first component carrier and the second component carrier is transmitted, and a user equipment performs discontinuous reception using a timer value corresponding to a duplex mode of said cell on which the uplink control channel is transmitted upon receiving at least one of a first downlink data signal transmitted over the first component carrier and a second downlink data signal transmitted over the second component carrier.. ... Ntt Docomo Inc

01/12/17 / #20170013647

User apparatus, base station, control information detection method and control information transmission 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, the plurality of candidate areas are divided into a common candidate area where a plurality of user apparatuses commonly perform blind decoding and an individual candidate area for the user apparatus, and the control information detection unit performs blind decoding in the individual candidate area without performing blind decoding in the common candidate area during a period when the user apparatus monitors a random access response.. . ... Ntt Docomo Inc

01/12/17 / #20170013646

User equipment and communication control method

Techniques are disclosed for implementing the lbt in consideration of propagation delay differences in a cell. One aspect of the present invention relates to user equipment, comprising: a transmission and reception unit configured to use a scheduled radio resource to perform transmission and reception to/from a base station via a cell; and a frequency usage detection unit configured to perform listen before talk (lbt) on a frequency band in the cell at an lbt timing independent of a scheduled uplink transmission timing, wherein when the frequency usage detection unit determines that no other user equipment is communicating in the frequency band, the transmission and reception unit performs uplink transmission to the base station.. ... Ntt Docomo Inc

01/12/17 / #20170013631

User equipment, band balancing controller and rs-sinr reporting method

A user apparatus in a mobile communication system supporting carrier aggregation includes a measurement unit configured to measure an rs-sinr (reference signal-signal to interference and noise ratio) for a reference signal in a physical downlink control channel transmitted from a base station; and a reporting unit configured to report the measured rs-sinr to the base station in accordance with a predefined reporting trigger.. . ... Ntt Docomo Inc

01/12/17 / #20170013623

Mobile station, base station, and communication control method

A mobile station which configures a plurality of component carriers to communicate with a base station includes a transmission unit configured to transmit to the base station a terminal capability associated with non-gap measurement indicating whether the mobile station is capable of performing inter-frequency measurement using a radio frequency (rf) chain which is not used for a component carrier; a reception unit configured to receive whether to allow the non-gap measurement from the base station; and a communication control unit configured to control communication according to a gap pattern of using a portion of an inter-frequency measurement duration for data communication, when the non-gap measurement is allowed.. . ... Ntt Docomo Inc

01/12/17 / #20170013437

User terminal, radio communication system and radio communication method

To enable a user terminal that receives a discovery signal of another user terminal for performing type 1 discovery to synthesize and receive the discovery signal, a user terminal capable of executing inter-terminal direct signal transmission/reception has a selecting section that selects a discovery signal transmission resource at the next period for each period, and a transmission section that transmits information on the discovery signal transmission resource at the next period, together with the discovery signal.. . ... Ntt Docomo Inc

01/12/17 / #20170012727

User terminal, radio base station, and radio communication method

For the purpose of preventing transmission of ul signals in a subframe other than a ul subframe during the fallback operation in dynamic tdd communication, the present invention provides a user terminal for communicating in dynamic tdd, the user terminal having: a reception section that receives control information including an indication to dynamically change a subframe configuration of a dynamic tdd cell and a control section that controls not to perform specific resource transmission in flexible subframes in the fallback operation based on the subframe configuration of dynamic tdd cell signaled by higher layers or sib1.. . ... Ntt Docomo Inc

01/12/17 / #20170012687

Radio base station, user terminal and radio communication method

A radio base station with a transmission processing section that converts a symbol allocated at a higher symbol rate than a nyquist rate in a given time domain and/or frequency domain into a symbol allocated at a symbol rate of the nyquist rate or less in the given time domain and/or frequency domain to generate an ofdma (orthogonal frequency division multiple access) signal for each of a plurality of antennas. The radio base station also includes a transmission section that transmits the 01-dma signal of each of the plurality of antennas to a user terminal, where the transmission processing section applies transmit diversity with the plurality of antennas to the symbol allocated at the higher symbol rate to improve throughput in a radio communication system using transmit diversity.. ... Ntt Docomo Inc

01/05/17 / #20170006613

User equipment and base station

The present disclosure relates to techniques for reducing flash light effect in 3d mimo. One aspect of the present invention relates to user equipment, comprising: a transmission and reception unit configured to receive an interference beam candidate list including directional beams transmitted from a camped base station and interference beam candidates transmitted from an adjacent base station; a measurement unit configured to measure reception quality of reference signals transmitted in the respective directional beams in the received interference beam candidate list; and an interference information generation unit configured to generate interference information based on the measured reception quality, wherein the transmission and reception unit indicates the generated interference information to the camped base station or the adjacent base station.. ... Ntt Docomo Inc

01/05/17 / #20170006539

User equipment and base station

The present disclosure relates to techniques for implementing cell selection suitable for 3d mimo. One aspect of the present invention relates to user equipment, comprising: a transmission and reception unit configured to receive a reference signal list including precoded reference signals transmitted from a camped base station and an adjacent base station; a measurement unit configured to measure reception quality of the respective precoded reference signals in the received reference signal list; and a beam selection unit configured to select a beam to communicate with the camped base station or the adjacent base station based on the measured reception quality and indicate the selected beam to the camped base station or the adjacent base station.. ... Ntt Docomo Inc

01/05/17 / #20170006522

Restriction control apparatus, restriction control system, and restriction control method

A restriction control apparatus configured to perform restriction control of communication of a user apparatus in a mobile communication system includes an information obtaining unit configured to obtain, from a user information management apparatus in the mobile communication system, group identification information indicating a group to which the user apparatus belongs, and a restriction determination unit configured, when receiving a communication request from the user apparatus, to determine whether the group to which the user apparatus belongs is a control target or not based on the group identification information and group identification information of a control target determined by the restriction control apparatus.. . ... Ntt Docomo Inc

01/05/17 / #20170006457

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

To reduce interference (in-band emission) to pucch by an inter-terminal discovery signal when the pucch and inter-terminal discovery signal are subjected to frequency division multiplexing, a user terminal of the present invention performs frequency division multiplexing on the pucch and the inter-terminal discovery signal to transmit. Further, the user terminal of the invention is provided with a reception section that receives limited resource region information indicative of a limited resource region obtained by removing an adjacent region of a frequency resource region where the pucch is allocated from a radio base station, a determining section that determines a distance between the radio base station and the user terminal, and a selecting section that selects an allocation resource of the inter-terminal discovery signal from the limited resource region when the determining section determines that the distance is relatively close.. ... Ntt Docomo Inc

01/05/17 / #20170005777

User equipment and method

Some techniques are disclosed for determining downlink control information for use in each cell in carrier aggregation using a fdd cell and a tdd cell together. One aspect of the present invention relates to 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 in accordance with a frequency division duplex (fdd) mode and a time division duplex (tdd) mode; a cell management unit configured to manage the multiple cells; and a communication control unit configured to determine whether a duplex mode applied to a primary cell in the multiple cells is either the fdd mode or the tdd mode and receive and demodulate downlink control information compliant with the determined duplex mode for each carrier aggregation implemented cell.. ... Ntt Docomo Inc

01/05/17 / #20170004829

Terminal apparatus, program, and server apparatus for providing information according to user data input

Provided is a method of alleviating difficulty experience by a user when issuing an instruction by speech. When the user performs a predetermined operation on a terminal apparatus, the terminal apparatus displays a dialogue screen to wait for a speech instruction. ... Ntt Docomo Inc








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