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Ntt Docomo Inc patents (2018 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 apparatus, communication system, and backoff control method

A user apparatus is disclosed herein including a resource state detection unit configured to detect a state of a resource in a set of resources that can be used for device-to-device communication. The user apparatus further includes a control unit configured, when the state detected by the resource state detection unit does not satisfy a predetermined condition, to set the user apparatus to be in a state in which the user apparatus does not perform transmission of a device-to-device communication signal for a predetermined period. ... Ntt Docomo Inc

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

The present invention is designed to adequately carry out uplink communication in unlicensed bands in a radio communication system (laa) that runs lte in unlicensed bands. A user terminal has a control section that controls the transmission and receipt of a signal in a first frequency carrier in which lbt (listen before talk) is configured or in a second frequency carrier in which lbt is not configured, and the control section controls the step of receiving a random access response and subsequent steps in random access procedures to be performed in the second frequency carrier, and, furthermore, controls uplink transmission to be carried out in the first frequency carrier after random access is established.. ... Ntt Docomo Inc

User terminal, radio base station and radio communication method

The present invention is designed so that ul signals of a plurality of user terminals can be multiplexed and communicated in cells where listening is employed (for example, unlicensed bands). According to the present invention, a user terminal communicates with a radio base station in a cell where listening is executed before uplink (ul) signals are transmitted, and has a transmission section that transmits ul signals, and a control section that controls the transmission of ul signals based on the result of listening. ... Ntt Docomo Inc

Base station and transmission method

A base station used as a first base station in a wireless communication system including the first base station, a second base station that communicates with the first base station, and a user equipment that communicates with the first base station includes: a reception unit that receives a parameter used for generating a downlink physical data channel and data to be transmitted toward the user equipment from the second base station; a generating unit that generates the downlink physical data channel by performing processing of layer 1 on the data using the parameter; and a transmission unit that transmits the generated downlink physical data channel.. . ... Ntt Docomo Inc

Base station and reporting method

A base station of a radio communication system supporting carrier aggregation is provided. The base station includes a receiver configured to receive, from a user apparatus, first band combination information that indicates combinations of bands supported by the user apparatus through the carrier aggregation, the first band combination information being generated in a first format; a generator configured to generate, based on the combinations of bands indicated by the first band combination information, second band combination information using a second format; and a transmitter configured to transmit, to another base station or a switching apparatus, the second band combination information generated by the generation unit.. ... Ntt Docomo Inc

User terminal, radio base station and radio communication method

The present invention is designed so that ul transmission can be made adequately even when channel state information of a plurality of ccs is transmitted. A user terminal can communicate with a radio base station by using a plurality of component carriers (ccs), and has a transmission section that transmits delivery acknowledgment signals for one or more ccs and/or channel state information of a plurality of ccs, in a predetermined subframe, in an uplink control channel, and a control section that performs control so that part or all of the channel state information of the plurality of ccs is dropped when transmission power configured for ul transmission in the predetermined subframe exceeds a predetermined value.. ... Ntt Docomo Inc

Radio base station, user terminal and radio communication method

To suppress decrease in throughput even in the case of combining noma and mimo to use, a radio base station according to one aspect of the present invention has a transmission section that transmits a dl signal to each of a plurality of user terminals with a single or a plurality of streams, and a control section that controls so as to perform power multiplexing on dl signals transmitted to the user terminals to transmit, where the control section sets a multiplexing power ratio of the dl signals to perform power multiplexing for each stream.. . ... Ntt Docomo Inc

User apparatus, base station, communication method, and indication method

A user apparatus in a radio communication system that supports d2d includes: an acquisition unit configured to acquire radio parameter information including a d2d radio parameter managed in a unit of a predetermined region including a plurality of cells from a base station; and a communication unit configured to transmit and receive a d2d signal using the d2d radio parameter in the predetermined region.. . ... Ntt Docomo Inc

User apparatus, and transmission method

A user apparatus in a mobile communication system includes an allocation means that divides a message that includes control information and data into a plurality of partial messages, and allocates resources included in one or more resource pools to the plurality of partial messages; and a transmission means that transmits the plurality of partial messages using the resources allocated by the allocation means.. . ... Ntt Docomo Inc

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

Ghost image elimination of doe using fourier optics method

A see-through image display system having a doe often has undesirable light or so called ghost images due to the quantization of saw tooth shape of doe surface. This invention provides ways to eliminate ghost images.. ... Ntt Docomo Inc

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

An object is to perform flexible aperiodic csi reporting even with a larger number of component carriers that can be allocated to each user terminal than in an existing system. A user terminal of this invention communicates with a radio base station through a plurality of serving cells in different component carriers. ... Ntt Docomo Inc

User terminal and radio communication method

The present invention is designed so that a plurality of channels can be received adequately even when the bandwidth to use is limited to a narrowband which is a part of a system bandwidth. A user terminal, in which the bandwidth to use is limited to the narrowband which is a part of the system bandwidth, has a receiving section that receives a broadcast transport block and a unicast transport block, and a control section that switches the transport block to receive depending on the rrc mode of the user terminal, and, when the receiving section receives both the broadcast transport block and the unicast transport block and the user terminal is in the rrc-connected mode, the control section exerts control so that the unicast transport block is received, based on priorities that are determined in advance.. ... Ntt Docomo Inc

User terminal, radio base station and radio communication method

To enable communication to be performed with a communication scheme suitable for the future radio communication system where a plurality of user terminals is multiplexed in the power domain, a user terminal of the present invention is provided with a reception section that receives a downlink (dl) signal to the user terminal, and a decoding section that decodes the dl signal to the user terminal, where at least one of a cyclic prefix (cp) length, symbol length and transmission time interval (tti) length is different between the dl signal to the user terminal and a dl signal to another user terminal multiplexed in the power domain.. . ... Ntt Docomo Inc

09/20/18 / #20180270776

User apparatus and synchronization method

There is provided a user apparatus of a radio communication system supporting d2d communication, the user apparatus including a receiver configured to receive a first synchronization signal transmitted from a base station, a second synchronization signal transmitted from another user apparauts, or an external synchronization signal or external synchronization information transmitted from an external synchronization source; and a synchronization processor configured to execute synchronization using the first synchronization signal, the second synchronization signal, or the external synchronization signal or the external synchronization information received by the receiver; wherein, upon detecting that the user apparatus is outside a coverage area of the base station or outside an area in which the synchronization signal or the synchronization information can be received, the receiver is configured to receive the second synchronization signal by executing an initial search within a time window defined for monitoring the second synchronization signal.. . ... Ntt Docomo Inc

09/20/18 / #20180270717

Radio base station, and user equipment

An embodiment of a radio base station is provided that comprises antennas at least one dimensionally arranged, a signal generation unit that generates a reference signal for channel measurement, a control unit that controls transmission of the reference signal in accordance with configurations using part or all of the antennas, the configurations including all or any of a horizontal relation, a vertical relation, and a cross-polarized relation, a handover control unit that controls a handover when a measurement report is received from a user terminal, a control signal generation unit that generates a control signal based on an instruction from the handover control unit, and a transmission unit that transmits the reference signal in accordance with the configurations based on output from the control unit.. . ... Ntt Docomo Inc

09/20/18 / #20180270716

User equipment, base station, and connection establishment method

Provided is user equipment of a mobile communication system that supports a function for establishing a connection by reusing context information retained in each of the user equipment and a base station, the user equipment including a transmitter that transmits, to the base station, a first message indicating that the user equipment retains user equipment side context information; a receiver that receives, from the base station, a second message indicating that the base station retains base station side context information associated with the user equipment; and a connecting unit that establishes a connection with the base station using the user equipment side context information after receiving the second message.. . ... Ntt Docomo Inc

09/06/18 / #20180255572

User terminal, radio base station and radio communication method

A user terminal used in a radio communication system in which downlink (dl) and uplink (ul) are switchable per transmission time interval (tti), the user terminal is disclosed including a receiver that receives a dl signal in a dl tti. The user terminal also includes a processor that controls reception of the dl signal by determining whether each tti is the dl tti or not based on a signal configuration of each tti.. ... Ntt Docomo Inc

09/06/18 / #20180255568

User terminal, radio base station and radio communication method

There is provided a user terminal capable of realizing a low delay communication in the next generation mobile communication system, including: a reception section that receives at least one downlink control information out of first downlink control information for scheduling reception of downlink data and second downlink control information for scheduling transmission of uplink data; and a control section that controls to perform reception of the downlink data and/or transmission of the uplink data corresponding to the downlink control information at a predetermined transmission time interval (tti), wherein the control section is configured to set the predetermined tti to the same tti based on the tti that has received the downlink control information, regardless of whether the downlink control information is the first downlink control information or the second downlink control information.. . ... Ntt Docomo Inc

09/06/18 / #20180255566

User terminal, radio base station and radio communication method

A user terminal is disclosed that is configurable with a plurality of component carriers. The user terminal has a receiver that receives at least one of downlink control information and radio resource control (rrc) signaling, a transmitter that transmits uplink control information (uci), which includes at least delivery acknowledgment information, in a specific resource, by using a specific physical uplink control channel (pucch) format (pf), and a processor that executes control to select the specific pf and the specific resource based on a payload size of at least a part of the uci.. ... Ntt Docomo Inc

09/06/18 / #20180255550

User equipment, wireless base station, wireless communication method, and wireless communication system

Disclosed is to properly perform communications even in an environment enabled to use different tti lengths in combination. User equipment in one aspect of the present invention includes: a control unit that specifies a configuration of a plurality of transmission time intervals (tti: transmission time interval) contained in one subframe of an existing system; and a reception unit that receives downlink control information at a radio resource receiving allocation of pdcch (physical downlink control channel) of the existing system or at a first tti of the plural ttis, and receives data at, at least, one of the plural ttis on the basis of the downlink control information.. ... Ntt Docomo Inc

09/06/18 / #20180255543

User terminal, radio base station, and radio communication method

The invention aims to perform ul transmission in an appropriate manner even when using short transmission time intervals (ttis). A user terminal includes a transmission section that performs the ul transmission using at least one of a plurality of ttis contained in one subframe of existing systems, and a control section that controls allocation of an ul signal and/or an ul channel. ... Ntt Docomo Inc

09/06/18 / #20180255519

User terminal and radio communication method

A user terminal includes a receiver that receives, from a radio base station, indication information to indicate whether or not uplink signals of a plurality of user terminals are non-orthogonal-multiplexed; a processor that switches between transmission power control methods based on the indication information; and a transmitter that transmits an uplink signal by using a switched transmission power control method.. . ... Ntt Docomo Inc

09/06/18 / #20180254868

User terminal, radio base station, and radio communication method

A user terminal is disclosed that carries out communication using a predetermined radio access scheme. The user terminal includes a receiver that receives a reference signal in a specified radio resource, and carries out a reception process on the reference signal based on a specified orthogonalization application range, and a processor that determines at least one of the specified radio resource and the specified orthogonalization application range based on communication parameters used in the predetermined radio access scheme. ... Ntt Docomo Inc

09/06/18 / #20180254807

User terminal, radio base station, and radio communication method

It is possible to secure radio resources allocated to an uplink data channel even when radio resources allocated to an uplink control channel increase. A user terminal according to the present invention includes: a control section that maps an uplink data channel and an uplink control channel on different layers; and a transmission section that multiplexes on an identical radio resource the uplink data channel and the uplink control channel mapped on the different layers to transmit.. ... Ntt Docomo Inc

08/23/18 / #20180242374

User terminal, radio base station and radio communication method

The present disclosure is designed to carry out adequate communication even in carriers in which listen before talk (lbt) is executed. According to one aspect of the present disclosure, a user terminal communicates by using a cell in which listening is executed before signals are transmitted, and has a receiving section that receives a discovery signal, which includes a first synchronization signal and a second synchronization signal, and a control section that specifies an index of a subframe, in which the second synchronization signal is received, and the second synchronization signal is a different signal from a (secondary synchronization signal (sss) that is used in an existing system.. ... Ntt Docomo Inc

08/23/18 / #20180242354

User terminal, radio base station, and wireless communication method

This invention aims to appropriately perform random access even when a shortened tti is used. A user terminal includes a control section which controls communication using cells including at least two cells having different ttis (transmission time intervals), a transmission section which transmits a random access preamble, and a reception section which receives a response signal to the random access preamble, wherein the control section performs control to receive in a second cell, the response signal to the random access preamble transmitted in a first cell.. ... Ntt Docomo Inc

08/23/18 / #20180242350

User terminal, radio base station and radio communication method

A user terminal is disclosed that communicates in a narrow band that is narrower than a minimum bandwidth for use supported in an existing lte (long term evolution) system. The user terminal includes a receiver that receives downlink control information and a controller that controls a scheduling unit of a downlink data signal and/or an uplink data signal based on command information included in the downlink control information. ... Ntt Docomo Inc

08/23/18 / #20180242321

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

The present invention is designed so that even users terminals that are limited to using partial narrow bands in a system band as bands for their use can communicate adequately. According to one aspect of the present invention, 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 a downlink shared channel that is scheduled in a downlink narrow band, a control section that determines a radio resource for an uplink control channel based on the downlink shared channel, and a transmission section that transmits the uplink control channel in the radio resource, and the control section determines the radio resource for the uplink control channel so that a different radio resource is determined for each downlink narrow band.. ... Ntt Docomo Inc

08/23/18 / #20180242316

User equipment, wireless base station, and wireless communication method

Disclosed is to properly perform communications even in the coexistence of shortened ttis and normal ttis. User equipment performing communications by using a plurality of ccs (component carriers) including at least two ccs having different tti (transmission time interval) lengths, includes: a receiving section receiving downlink control information in a first cc and a control section controlling the communication in a second cc different from the first cc, based on the downlink control information.. ... Ntt Docomo Inc

08/23/18 / #20180241588

Radio base station, user terminal and radio communication method

The present invention is designed to allow co-presence with other systems, and, furthermore, achieve improved spectral efficiency in cells (for example, unlicensed bands) in which pre-transmission listening is employed. The present invention provides a transmission section that transmits a channel state information measurement reference signal, and a control section that controls the transmission of the channel state information measurement reference signal by employing listening, and the control section controls the channel state information measurement reference signal to be transmitted without being multiplexed with data and/or a control signal, and controls configuration information of the channel state information measurement reference signal that is transmitted without being multiplexed with data and/or a control signal to be transmitted.. ... Ntt Docomo Inc

08/23/18 / #20180241530

User equipment, radio base station, and wireless communication method

This invention aims to appropriately transmit harq-ack in future wireless communication systems. A user equipment includes a reception unit which receives a dl signal, and a control unit which controls transmission of a delivery acknowledgement signal for the dl signal, wherein the reception unit receives information concerning an instruction to transmit the delivery acknowledgement signal and the control unit controls transmission of the delivery acknowledgement signal on the basis of the information concerning the instruction to transmit the delivery acknowledgement signal. ... Ntt Docomo Inc

08/23/18 / #20180241518

User terminal, radio base station, and radio communication method

According to the present invention, a radio base station uses a measurement reference signal transmitted from a user terminal to carry out a measurement with a sufficient precision. According to an embodiment, a user terminal is configured to apply orthogonal frequency division multiple access (ofdma) in an uplink, the user terminal including a generating section configured to generate a measurement reference signal used for carrying out a measurement in a radio base station; a mapping section configured to map the measurement reference signal to a radio resource that is discontinuous in a time direction and/or a frequency direction; and a transmitting section configured to transmit the measurement reference signal to the radio base station.. ... Ntt Docomo Inc

08/23/18 / #20180241511

User terminal, radio base station and radio communication method

The present invention is designed so that communication can be carried out adequately even in a carrier where lbt is executed. According to one aspect of the present invention, a user terminal communicates by using a first cell and a second cell, the second cell executing listening before transmitting signals, and the user terminal has a receiving section that receives a random access response (rar) in the first cell, a transmission section that, after the rar is received, transmits an uplink signal in an uplink shared channel of the second cell, and a control section that performs retransmission control over the uplink signal, and the control section acquires information related to a hybrid automatic repeat request (harq) process number that corresponds to the uplink signal, and performs retransmission control over the uplink signal by using the harq process number.. ... Ntt Docomo Inc

08/23/18 / #20180241500

User terminal, radio base station, and radio communication method

A user terminal includes a receiver that receives a downlink shared channel and a processor that obtains a transport block size (tbs) used for the downlink shared channel based on: a tbs index value that is associated with a modulation and coding scheme (mcs) index value used for the downlink shared channel; and a number of resource blocks (rbs) that are allocated to the downlink shared channel. When the downlink shared channel is transmitted by a predetermined transmission scheme and the mcs index value is a predetermined value, the processor modifies the tbs index value associated with the predetermined value and obtains the tbs based on the modified tbs index value and the number of rbs.. ... Ntt Docomo Inc

08/16/18 / #20180235010

User terminal, radio base station and radio communication method

Embodiments disclosed herein are designed to allow co-presence with other systems, and, furthermore, achieve improved spectral efficiency in cells (for example, unlicensed bands) in which pre-transmission listening is employed. A user terminal communicates with a radio base station by executing listening before transmitting uplink (ul) signals. ... Ntt Docomo Inc

08/16/18 / #20180234994

User apparatus and communication method

A user apparatus in a radio communication system that supports a device to device (d2d) communication is disclosed. The user apparatus includes a first transmission unit configured to transmit radio resource allocation information, in case of transmitting a medium access control (mac) protocol data unit (pdu) of high priority, by using a specific subframe that is used for transmitting radio resource allocation information corresponding to a mac pdu of high priority, from among radio resources allocated to a d2d control channel. ... Ntt Docomo Inc

08/16/18 / #20180234977

Control apparatus, user apparatus, radio resource allocation method and communication method

A control apparatus according to an embodiment is provided. The control apparatus is included in a wireless communication system that includes the control apparatus, which performs radio resource allocation for d2d communications, and a user apparatus. ... Ntt Docomo Inc

08/16/18 / #20180234954

Radio base station, user terminal and radio communication method

The present invention is designed so that it is possible to feed back harq-acks adequately and prevent the decrease of communication quality even when a plurality of component carriers are configured in a radio communication system. A radio base station communicates with a user terminal that can use a plurality of cells, and has a control section that controls dl transmission from each cell, and a receiving section that receives acks/nacks fed back from the user terminal in response to dl transmission, and, in this radio base station, the control section controls dl transmission by including, in downlink control information of each cell that performs dl transmission, information that indicates whether or not each cell transmitting the downlink control information is a specific cell.. ... Ntt Docomo Inc

08/16/18 / #20180234928

User apparatus and signal synchronization method

There is provided a user apparatus of a radio communication system supporting d2d communication, the user apparatus including a receiver configured to receive a signal of an external synchronization source, a synchronization signal transmitted from a base station, or a synchronization signal transmitted from another user apparatus; and a synchronization processor configured to execute, in accordance with priority information indicating priority order of signals used for synchronization, radio frame synchronization and frequency synchronization using any one of the signal of the external synchronization source, the synchronization signal transmitted from the base station, or the synchronization signal transmitted from the other user apparatus, which is received by the receiver.. . ... Ntt Docomo Inc

08/16/18 / #20180234888

User equipment and data transmission method

User equipment of a mobile communication system supporting d2d includes a reservation unit that transmits reservation information including reservation resource identification information corresponding to a reservation resource used for data transmission by the user equipment; and a transmitter that transmits data using the reservation resource corresponding to the reservation resource identification information.. . ... Ntt Docomo Inc

08/16/18 / #20180234220

User device and method for transmitting signal

A user device in a wireless communication system supporting d2d communication, includes a first transmitter configured to transmit control information for d2d by using a physical control channel for d2d in a wireless frame configuration in which the physical control channel for d2d and a physical data channel for d2d are frequency-multiplexed; and a second transmitter configured to transmit data corresponding to the control information for d2d by using the physical data channel for d2d in the wireless frame configuration in which the physical control channel for d2d and the physical data channel for d2d are multiplexed in a frequency domain.. . ... Ntt Docomo Inc

08/16/18 / #20180234163

Relay device and relay method

A relay device of a mobile communication system supporting device to device (d2d) communication that includes a transmitter that transmits, on a second carrier, a broadcast message indicating that a relay process can be executed, the relay process being such that a message to be received on a first carrier is to be transmitted on the second carrier; and a relay unit that transmits, on the second carrier, the message received on the first carrier.. . ... Ntt Docomo Inc

08/09/18 / #20180227981

Switching equipment, control server, and communication method

A switching equipment in a radio communication system including the switching equipment configured to communicate with a user equipment and a control server configured to manage the user equipment includes: a receiver unit configured to receive an extended idle-mode discontinuous reception parameter for setting in the user equipment from the control server; and a transmitter unit configured to transmit the received extended idle-mode discontinuous reception parameter to the user equipment.. . ... Ntt Docomo Inc

08/09/18 / #20180227980

User apparatus and connection control method

A user apparatus in a mobile communication system including a first base station that sets a link of a control plane between the first base station and the user apparatus, and a second base station that sets a link of a user plane between the second base station and the user apparatus, including: radio link monitoring means configured to perform monitoring of a radio link; and connection control means configured, when disconnection of the link of the control plane is detected by the radio link monitoring means, to perform reestablishment of the link of the control plane for the user apparatus while maintaining the link of the user plane.. . ... Ntt Docomo Inc

08/09/18 / #20180227971

User equipment and d2d signal transmission method

A user equipment of a mobile communication system supporting device to device (d2d) communication includes a memory that stores configuration information indicating information on a first resource with which transmission of a d2d signal by the user equipment is allowed and information on a second resource with which transmission of a d2d signal by an other user equipment is allowed, the other user equipment being a specific type of user equipment. The user equipment further includes a transmitter that transmits, based on the configuration information, the d2d signal using the first resource.. ... Ntt Docomo Inc

08/09/18 / #20180227841

Communication control device selection method and communications system

In a communications system (1a), a communication service which is utilized by ue (10) is specified from among a first communication service and a second communication service, an address of a sgw (80) corresponding to a service type of the first communication service is retrieved when the specified communication service is the first communication service with reference to information in which the specified communication service and the address of the sgw (80) that transmits and receives data for utilizing the communication service are correlated with each other, and a sgw (80) other than a first communication control device is retrieved when the specified communication service is the second communication service.. . ... Ntt Docomo Inc

08/09/18 / #20180227723

Base station, data communication amount management apparatus, data communication amount report method and data communication amount obtaining method

A base station in a mobile communication system, including: data communication amount measurement means configured to measure a data communication amount of a user apparatus connected to the base station for each bearer in the user apparatus for each carrier for transmitting data of the bearer; and data communication amount report control means configured to receive a data communication amount report request message from a data communication amount management apparatus in the mobile communication system, generate a data communication amount report message including a data communication amount corresponding to a request in the data communication amount report request message, and transmit the data communication amount report message to the data communication amount management apparatus.. . ... Ntt Docomo Inc

08/09/18 / #20180227436

Packet usage amount calculation device and packet usage amount calculation method

A packet usage amount calculation device and a packet usage amount calculation method capable of calculating a usage amount of a local network from a home network side, when communication is performed using subscriber information for the local network. In a proxy device, a subscriber profile storage unit stores token information associated with the subscriber information (a local network number) of the local network and an sms instruction unit transmits a token to a local network number destination. ... Ntt Docomo Inc

08/09/18 / #20180227082

Radio base station, user terminal and radio communication method

The present invention is designed to allow co-presence with other systems, and, furthermore, achieve improved spectral efficiency in cells (for example, unlicensed bands) in which pre-transmission listening is employed. The present invention provides a transmission section that transmits a dl signal, a control section that performs listening before the dl signal is transmitted, and controls dl transmission, and a receiving section that receives a delivery acknowledgement signal (ack/nack) in response to the dl transmission, and the control section controls a contention window size to apply to listening based on the number of nacks in response to a predetermined period of dl transmission.. ... Ntt Docomo Inc

08/09/18 / #20180226987

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

08/02/18 / #20180220434

User terminal, radio base station, and radio communication method

A user terminal communicates with a first cell where a time interval of uplink (ul)/downlink (dl) is dynamically switched, and a second cell where uplink/downlink is switched in a desired time interval. The user terminal includes a transmitting section that transmits an uplink signal; a receiving section that receives a downlink signal; and a control section that controls communication in the transmitting section and in the receiving section. ... Ntt Docomo Inc

08/02/18 / #20180220420

Radio base station, user terminal and radio communication method

A radio base station is disclosed. The radio base station has a transmitter that transmits downlink (dl) data and a measurement signal to a user terminal and a processor that executes control of transmission of the dl data and the measurement signal based on a result of listening, which is performed before signals are transmitted. ... Ntt Docomo Inc

08/02/18 / #20180220419

User terminal, radio base station, and radio communication method

The present invention is designed so that communication is carried out in an appropriate manner even in an environment concurrently using transmission time intervals (ttis) of different lengths, a user terminal according to an embodiment of the present invention includes a control unit for determining the structures of the ttis contained in one subframe of existing systems, and a reception unit for receiving a reference signal and data in at least one of the ttis. The reception unit receives a cell-specific reference signal in each of the ttis using a radio resource to which the cell-specific reference signal is allocated in the existing systems.. ... Ntt Docomo Inc

08/02/18 / #20180220295

User equipment and capability information reporting method

Techniques are disclosed for controlling carrier aggregation appropriately in a radio communication system having a mixture of harmonic measure equipped user equipments and harmonic measure unequipped user equipments. One aspect of the present invention relates to user equipment having a carrier aggregation function. ... Ntt Docomo Inc

08/02/18 / #20180220150

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

07/26/18 / #20180213489

User device, base station, communication method, and instruction method

A user device for a radio communication system supports uplink carrier aggregation. The user device includes a transmitter that transmits an uplink signal to a base station by using a first component carrier and a second component carrier having a tti length shorter than a tti length of the first component carrier, and a calculator that calculates a lower limit and an upper limit of a maximum transmission power of the uplink signal according to predetermined formulas using one of a subframe of the first component carrier and a subframe of the second component carrier as a reference subframe.. ... Ntt Docomo Inc

07/26/18 / #20180213439

Radio communication device and radio communication method

A radio communication device is disclosed that transmits and receives protocol data units in a packet data convergence protocol layer located above a radio link control layer. The radio communication device includes a processor that generates a status report indicating reception status of the protocol data units in the packet data convergence protocol layer and a transmitter that transmits the status report in the packet data convergence protocol layer to a destination radio communication device. ... Ntt Docomo Inc

07/26/18 / #20180213400

Sip control apparatus, mobile communication system and communication control method

A sip control apparatus is provided. The sip control apparatus is connected to a management apparatus controlling call processing policy in an ip network, and controls a voice call made by a user apparatus. ... Ntt Docomo Inc

07/26/18 / #20180212742

User terminal, radio base station and radio communication method

A user terminal is disclosed including a transmitter that communicates with a first cell group (cg) including a first secondary cell (scell) and transmits uplink control information using an uplink control channel of the first scell. The user terminal includes a processor that deactivates the first scell within a predetermined period from a subframe in which a deactivation command for the first scell is reported or a subframe in which a deactivation timer applied to the first scell expires.. ... Ntt Docomo Inc

07/26/18 / #20180212718

User terminal, radio base station and radio communication method

A user terminal is disclosed. The user terminal has a transmitter that transmits uplink control information (uci) and a processor executes control to transmit at least a part of the uci by using a specific physical uplink control channel (pucch) format (pf). ... Ntt Docomo Inc

07/19/18 / #20180206243

Mobile terminal, base station, communication state notification method, and scheduling method

A mobile terminal capable of communication in a cellular system and another radio system with a different frequency band includes a simultaneous communication determination unit configured to determine whether the mobile terminal simultaneously communicates in the cellular system and the other radio system; and a notification unit configured to notify a base station that the mobile terminal is in a simultaneous communication state, when the mobile terminal simultaneously communicates in the cellular system and the other radio system.. . ... Ntt Docomo Inc

07/19/18 / #20180206232

User terminal, radio base station, and radio communication method

According to the present invention, appropriate communication can be carried out even if a shortened tti is applied. A user terminal includes a receiving section configured to receive a dl signal, a transmitting section configured to feedback a delivery acknowledgement signal for the dl signal, and a control section configured to control the feedback of the delivery acknowledgement signal. ... Ntt Docomo Inc

07/19/18 / #20180206107

Radio communication system, radio base station, mobility management entity, user device, and communication control method

Provided is a radio communication system, a radio base station, a mobility management entity, a user device, and a communication control method in which an idle user device can be quickly and reliably returned to a connected state in a configuration in which a huge number of user devices (ue) are connected to a radio network such as in ciot. The communication control method includes forwarding, when ue has transitioned from a connected state to an idle state, in which enb forwards to mme as context that is a context of an access layer between the ue and the enb; transmitting in which the mme transmits the as context to the enb in response to an acquisition request of the as context from the enb; and causing the enb to return the ue to the connected state by using the as context transmitted from the mme.. ... Ntt Docomo Inc

07/19/18 / #20180205428

Downlink precoding method and base station

Disclosed are a downlink precoding method and a base station. The method includes: configuring a first precoding mode for a first cell, wherein the first precoding mode includes information of a precoding matrix configured for each candidate user of the first cell on each resource; selecting a scheduling user on each resource from candidate users according to the first precoding mode; and performing precoding to a channel estimation signal and downlink data of the scheduling user according to a precoding matrix of the scheduling user, and transmitting precoded channel estimation signal and precoded downlink data to the scheduling user. ... Ntt Docomo Inc

07/12/18 / #20180199393

Radio communication system and control method

A radio communication system is disclosed that includes at least one user equipment and multiple base stations including a first base station configured to execute radio resource control of the user equipment through a control path and a second base station configured not to execute radio resource control of the user equipment. The system includes multiple gateways, including a first gateway connected with the first base station and a second gateway connected with the second base station, and a switching station that controls the establishment of user paths among nodes.. ... Ntt Docomo Inc

07/12/18 / #20180199322

User terminal, radio base station, and radio communication method

According to the present invention, communication is carried out using a transmission time interval (tti) that is suitable for a future radio communication system. A user terminal of the present invention includes a receiving section configured to receive a downlink signal; a transmitting section configured to transmit an uplink signal; and a control section configured to control a transmission time interval (tti) used in reception of the downlink signal and/or used in transmission of the uplink signal. ... Ntt Docomo Inc

07/12/18 / #20180199314

User terminal, radio base station, and radio communication method

According to the present invention, appropriate communication can be carried out even if a plurality of services are applied. A user terminal includes a receiving section configured to receive downlink control information (dci) in regard to transmission and/or reception of a transport block (tb); and a control section configured to control, based on the dci, transmission and/or reception of a plurality of tbs in the same cc (component carrier), the same layer and the same tti (transmission time interval).. ... Ntt Docomo Inc

07/12/18 / #20180198568

User terminal, radio base station and radio communication method

The present invention is designed so that uplink control signals adequately even when the number of component carriers that can be configured in a user terminal is expanded. The present invention provides a receiving section that receives a dl signal, a transmission section that transmits ul control information, which includes a delivery acknowledgement signal in response to the dl signal, and a control section that controls the transmission of the ul control information, and the control section controls the transmission of the ul control information by using a pucch format, in which a cyclic shift is applied to a first symbol for a demodulation reference signal, and in which the orthogonal code is not applied, or an orthogonal code having a shorter sequence length than the sequence length adopted in existing pucch format 3 is applied, to a second symbol.. ... Ntt Docomo Inc

07/05/18 / #20180192435

User apparatus, base station, and communication method

A user apparatus according to an embodiment is provided. The user apparatus communicates with a base station in a wireless communication system. ... Ntt Docomo Inc

07/05/18 / #20180192330

Communication control method, communication control device, and communication system

Provided are a communication control method, a communication control device, and a communication system that can appropriately change a device on a network that executes request processing from a terminal. In a node changing device 10, a sequence monitoring unit 12 detects handover of a ue 90. ... Ntt Docomo Inc

07/05/18 / #20180192314

Mobile station and mobile communication method

Provided are a mobile station and a mobile communication method in which, when a secondary cell (scell) is established in an unlicensed band, received power in the unlicensed band can be efficiently measured and reported to a radio access network. A ue (100) includes an rssi measurement unit (133) that repeatedly measures rssi in the frequency band of the secondary cell, a report determination unit (140) that determines, based on an rssi measurement result, whether to report the measurement result to the radio access network, and a measurement report unit (150) that reports the measurement result to the radio access network. ... Ntt Docomo Inc

06/28/18 / #20180184418

User terminal, radio base station and radio communication method

The present invention is designed so that it is possible to adequately control the transmission power of uplink control channels even when the number of component carriers (ccs) that can be configured per user terminal is expanded more than in existing systems. According to the present invention, a user terminal has a transmission section that transmits an uplink control channel, and a control section that controls the transmission power of the uplink control channel, and the control section controls the transmission power of the uplink control channel based on at least one of the number of resource blocks constituting the format of the uplink control channel and the payload in the format including the cyclic redundancy check (crc) bits.. ... Ntt Docomo Inc

06/28/18 / #20180184120

Low-complexity intra prediction for video coding

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

06/28/18 / #20180183491

User terminal, radio base station and radio communication method

A user terminal is disclosed including a receiver that receives a downlink signal that is transmitted in repetitions in narrow bands to which frequency hopping is applied, and a processor that specifies a pattern of the applied frequency hopping based on a starting index that indicates a first narrow band in the narrow bands and a frequency offset that is a shift in a frequency direction from the first narrow band. The processor causes the receiver to receive the downlink signal using the specified pattern. ... Ntt Docomo Inc

06/21/18 / #20180176943

User terminal, radio base station and radio communication method

A user terminal includes: a reception section that detects instruction information of a reception of a downlink shared channel on a downlink control channel; a transmission section that transmits uplink control information on the reception of the downlink shared channel corresponding to the instruction information; and a control section that determines a pucch (physical uplink control channel) format for transmitting the uplink control information from a plurality of pucch formats including a large-capacity pucch format having a larger capacity than pucch format 3. The control section determines a pucch resource for transmission with the large-capacity pucch format based on the instruction information.. ... Ntt Docomo Inc

06/21/18 / #20180176934

User apparatus and timer control method

A user apparatus is provided. The user apparatus communicates with a base station in a mobile communication system. ... Ntt Docomo Inc

06/21/18 / #20180176919

User equipment and communication method

A user equipment for communicating with a base station in a radio communication system that supports narrow band communication is disclosed including a receiver that receives, from the base station via a first frequency band, information for identifying a second frequency band. A synchronization signal and broadcast information are transmitted on the first frequency band, and the synchronization signal and the broadcast information are not transmitted on the second frequency band. ... Ntt Docomo Inc

06/21/18 / #20180176833

Communication device and communication control method

A module includes a switching request receiving unit configured to receive, when the module is connected with one terminal, a switching request indicating a connection switching to another terminal, an address changing unit configured to change the connection destination address using the reception of the switching request by the switching request receiving unit as a trigger, a connection disconnecting unit configured to forcibly disconnect the connection with the one terminal when the connection destination address is changed by the address changing unit, and a connection process executing unit configured to receive a connection request from the another terminal by the connection destination address changed by the address changing unit after the connection with the one terminal is disconnected by the connection disconnecting unit and to connect with the another terminal.. . ... Ntt Docomo Inc

06/21/18 / #20180176376

Sip control apparatus, mobile communication system and emergency call control method

A sip control apparatus is provided. The sip control apparatus is connected to a management apparatus controlling call processing rules in an ip packet network, and controls an emergency call made by a user apparatus. ... Ntt Docomo Inc

06/14/18 / #20180167999

Base station, management apparatus and connection method

A base station includes a transceiver and a processor. The processor is configured to: in response to receiving a connection request from user equipment, causes a transceiver to transmit a message to a first management apparatus; and in response to receiving a reroute message to indicate a reroute from a first management apparatus to a second management apparatus, causes the transceiver to transmit non access stratum (nas) information in the reroute message to the second management apparatus. ... Ntt Docomo Inc

06/14/18 / #20180167989

User device, signal transmission method, and signal reception method

A user device for a radio communication system supporting device-to-device (d2d) communication is disclosed. The user device includes a transmitter that transmits a d2d signal by mapping a reference signal to a physical channel according to a first mapping configuration or according to a second mapping configuration. ... Ntt Docomo Inc

06/14/18 / #20180167943

User equipment

A user equipment that includes a transmission and reception unit configured to transmit and receive a radio signal to and from a base station and a capability information indication unit configured to transmit capability information to the base station. The capability information indicates carrier aggregation (ca) capable carrier combinations as well as bandwidths of the respective carriers. ... Ntt Docomo Inc

06/14/18 / #20180167896

Terminal and communication control method

A terminal is provided. The terminal communicates with a base station in a mobile communication system which supports carrier aggregation provided by a first cell and a second cell which uses a subframe whose time interval is shorter than a time interval of a subframe of the first cell. ... Ntt Docomo Inc

06/14/18 / #20180167888

User terminal

A user device includes a receiver configured to receive information indicating a ratio between a downlink data signal transmission power for an ofdm (orthogonal frequency division multiplexing) symbol in which a crs (cell-specific reference signal) is not arranged and a downlink data signal transmission power for an ofdm symbol in which a crs is arranged; and a controller configured to calculate a downlink data signal transmission power based on the information.. . ... Ntt Docomo Inc

06/14/18 / #20180167823

User apparatus and mac control element transmission method

A user apparatus that communicates with a base station in a mobile communication system that supports uplink carrier aggregation, including: determination means configured to determine, based on assignment information, of an uplink transmission resource, received from the base station, whether a serving cell corresponding to the uplink transmission resource is a cell that uses a licensed spectrum or not; and transmission means configured, if the serving cell is determined to be a cell that uses the licensed spectrum by the determination means, to transmit a mac control element to the base station by the serving cell.. . ... Ntt Docomo Inc

06/14/18 / #20180167169

User terminal, radio base station and radio communication method

A user terminal is disclosed that has a receiver that receives transmission acknowledgment information, in response to an uplink data channel in a narrow band in a system band, via a downlink control channel that is transmitted in a starting subframe of a predetermined cycle and a processor that controls retransmission of the uplink data channel based on the transmission acknowledgment information. Further, a radio base station is disclosed that communicates with a user terminal. ... Ntt Docomo Inc

06/14/18 / #20180167118

User terminal, radio communication system and radio communication method

The present invention is designed to control the antenna selection in a user terminal adequately even when the user terminal connects with a plurality of radio base stations by employing dual connectivity (dc). A user terminal supports communication which uses dual connectivity with a plurality of radio base stations that each configure a cell group formed with one or more cells, and this user terminal has a transmission section that transmits ul signals to one or a plurality of cell groups, and a control section that controls the antenna selection for transmitting the ul signals, and, when antenna selection for a serving cell (ue transmit antenna selection) is configured, the control section controls the antenna selection expecting that the plurality of cell groups are not configured.. ... Ntt Docomo Inc

06/07/18 / #20180160375

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

A user terminal is disclosed that connects with a plurality of radio base stations and the decrease of uplink throughput is reduced. A user terminal connects with a plurality of radio base stations including a first radio base station and a second radio base station, and this user terminal has a transmission section that transmits uplink signals to each radio base station, a receiving section 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 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

06/07/18 / #20180160372

User terminal, radio base station and radio communication method

To suppress decrease in throughput even in the case where downlink transmit power is controlled, a user terminal according to one aspect of the present invention has a reception section that receives information on a candidate for downlink transmit power, a generating section that selects a plurality of candidates for downlink transmit power to generate csi (channel state information) on the plurality of candidates for downlink transmit power, and a transmission section that transmits the csi on the plurality of candidates for downlink transmit power.. . ... Ntt Docomo Inc

06/07/18 / #20180159215

Multi-band array antenna

A multi-band array antenna comprises m first antenna elements operating in p frequency bands; n second antenna elements operating in q frequency bands; a wilkinson power distributor; one or more filters; and one or more matching circuits. Here, m and n are positive integers satisfying m+n≥3 and any of m=n+1, n=m+1 and m=n; and p and q are positive integers satisfying p≥1, q≥2 and q>p. ... Ntt Docomo Inc

05/31/18 / #20180152868

User equipment, base station and communication method

There is provided user equipment for communicating with a base station in a mobile communication system supporting lte including a reception unit configured to receive an indication from the base station to change a sequence number length of an rlc pdu, a re-establishment unit configured to perform re-establishment of an rlc entity upon receiving the indication, and a communication unit configured to use the rlc pdu with the changed sequence number length to communicate with the base station after completion of the re-establishment.. . ... Ntt Docomo Inc

05/24/18 / #20180146455

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

The present invention is designed so that it is possible to increase the epdcch capacity for transmitting control information that is required in cross-carrier scheduling in enhanced carrier aggregation. A user terminal can communicate with a radio base station using six or more component carriers, and has a control section that exerts control so that, based on one or a plurality of epdcch (enhanced physical downlink control channel) groups configured by the radio base station, and component carrier indices corresponding to each epdcch set group, blind decoding is performed on epdcch sets included in the epdcch set groups, and dci (downlink control information) of component carriers corresponding to the epdcch set groups is detected.. ... Ntt Docomo Inc

05/24/18 / #20180146389

Mobile station, base station and radio communication method

The present invention provides a mobile station, a base station and a radio communication method. A mobile station pertaining to the present invention is provided, including a receiving section configured to receive information that indicates at least one reference signal resource and measurement window information that indicates an allocation of a measurement window; a measuring section configured to measure a reference signal, to which precoding has been applied, based on the information that indicates the at least one reference signal resource and the measurement window information, and to generate a measurement result; and a transmitting section configured to transmit the measurement result.. ... Ntt Docomo Inc

05/24/18 / #20180146209

Predictive encoding method, predictive encoding device, and predictive encoding program of motion vector, and, predictive decoding method, predictive decoding device, and predictive decoding program of motion vector

A predictive coding system can encode motion vectors by determining a motion vector of a target partition in a frame picture of an encoding target; determining a first motion vector predictor candidate from a motion vector or motion vectors of one or more partitions belonging to a left-neighboring region to the target partition; determining a second motion vector predictor candidate from a motion vector or motion vectors of one or more partitions belonging to an above-neighboring region to the target partition; selecting an optimum motion vector predictor and outputting motion vector predictor indication information to specify the selected optimum motion vector predictor, the optimum motion vector predictor selected based on comparison between one or more motion vector predictor candidates including the first motion vector predictor candidate and the second motion vector predictor candidate, and the motion vector of the target partition; and encoding the motion vector predictor indication information.. . ... Ntt Docomo Inc

05/24/18 / #20180145815

User terminal, radio base station and radio communication method

A user terminal is disclosed including a transmitter that transmits delivery acknowledgment signals (ack/nack) in response to downlink (dl) signals transmitted from a plurality of cells, a receiver that receives information about cells to be scheduled, and a processor that controls transmission of the ack/nack based on the information about the cells to be scheduled. Further, a radio base station is disclosed that communicates with a user terminal using a plurality cells, the radio base station including a processor that controls scheduling of downlink (dl) signals transmitted respectively from the plurality of cells; a transmitter that transmits information about cells to be scheduled; and a receiver that receives delivery acknowledgement signals (ack/nack) transmitted from the user terminal based on the information about the cells to be scheduled.. ... Ntt Docomo Inc

05/24/18 / #20180145807

Information transmission method, information processing method, base station, and mobile station

An information transmission method used in a base station includes: determining mode indication information regarding reference signals to be transmitted; transmitting the mode indication information to a mobile station; and transmitting the reference signals to the mobile station based on the mode indication information.. . ... Ntt Docomo Inc

05/17/18 / #20180139750

User apparatus, base station and information reception method

A user apparatus configured to perform communication with a base station in a mobile communication system that supports carrier aggregation, including: transmission means configured to transmit, to the base station, the number of layers for each of component carriers that form the carrier aggregation as information of downlink mimo capability; and reception means configured to receive, from the base station, the number of layers that is used for determining a bit width of a rank indicator for each of the component carriers that form the carrier aggregation.. . ... Ntt Docomo Inc

05/17/18 / #20180139749

User terminal, radio base station and radio communication method

According to the present invention, periodic csi reporting that is suitable for use when the number of component carriers that can be configured per user terminal is expanded more than in existing systems can be implemented. According to the present invention, a user terminal has a transmission section that transmits channel state information periodically, and a control section that controls the transmission of the channel state information, and the control section controls the transmission of a plurality of channel state information using a pucch format which can use a plurality of resource blocks and/or which has a smaller spreading factor than the spreading factor of pucch format 3.. ... Ntt Docomo Inc

05/17/18 / #20180139746

User terminal, radio base station and radio communication method

To reduce a reception processing load, while obtaining gain of non-orthogonal multiple access (noma), in the case of transmitting a downlink signal using the noma scheme, a user terminal according to one aspect of the present invention is provided with a transmission section that transmits a plurality of precoding matrix indicators (pmis) to a radio base station, and a reception section that receives, from the radio base station, a downlink signal that is non-orthogonally multiplexed with a downlink signal to another user terminal determined based on the plurality of pmis and that is multiplied by the same precoding matrix as that of the downlink signal to another user terminal.. . ... Ntt Docomo Inc

05/17/18 / #20180139744

User device, gateway device, radio base station, mobile communication system, and mobile communication method

A user device with a radio resource control unit configured to perform a process in a control plane according to radio resource control and a mobility management unit configured to perform mobility management of the user device and enable a process in a user plane is provided. The user device includes: a state control unit configured to cause the user device to transition from rrc-idle state where no communication bearer in the control plane is established, and emm-idle state where communication in the user plane is not enabled, to rrc-connected state where a communication bearer in the control plane is established and the emm-idle state; and a data transmission unit configured to transmit user data inputted into the user device, via the communication bearer in the control plane in the rrc-connected state and the emm-idle state. ... Ntt Docomo Inc

05/17/18 / #20180139732

User terminal, radio base station, and radio communication method

An aperiodic csi report is appropriately triggered even when the number of component carriers that can be configured per user terminal is enhanced compared to an existing system. A user terminal includes: a reception section that receives downlink control information including information related to an instruction of transmission of aperiodic channel state information; and a control section that controls the transmission of the aperiodic channel state information, and the control section controls the transmission of the aperiodic channel state information by selecting a first modulation order or a second modulation order according to a number of serving cells and/or an index, where the first modulation order is defined in advance, the second modulation order is equal to or higher than the first modulation order, the serving cells are serving cells for which the transmission of the aperiodic channel state information is instructed, and the index is related to a modulation and coding scheme included in the downlink control information.. ... Ntt Docomo Inc

05/17/18 / #20180139725

User terminal, radio base station and radio communication method

The present invention is designed so that the overhead of communication can be reduced even when the band for use is limited to a narrower band than the minimum system bandwidth in existing lte systems. A user terminal has a transmitting/receiving section that transmits and receives signals to and from a radio base station based on a pattern that is comprised of a plurality of radio resources, and a control section that determines the pattern from a plurality of patterns based on user terminal-specific information.. ... Ntt Docomo Inc

05/17/18 / #20180139705

User terminal, radio base station and radio communication method

To carry out communications appropriately even if the number of component carriers settable to a user terminal is extended from the existing system. The user terminal according to one embodiment of the present invention is a user terminal which can communicate using a plurality of component carriers (ccs), which contains a generator unit which generates a power headroom report (phr) including information about a power headroom (ph) for each of ccs of a predetermined cell group among activated ccs and a transmission unit which transmits the generated phr.. ... Ntt Docomo Inc

05/17/18 / #20180139599

User device and base station

A user device, which is used in a mobile communication system supporting d2d communication, includes an acquirer that obtains a discovery message to be transmitted to another user device; a generator that divides the discovery message into two or more discovery messages, and stores the two or more discovery messages in two or more resource regions of a physical channel for the d2d communication to generate a transmission signal to be transmitted to the other user device; and a transmitter that transmits the transmission signal.. . ... Ntt Docomo Inc

05/17/18 / #20180139466

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

A moving picture encoding apparatus has a motion vector predicting part for performing, based on a temporal relation among adjacent reference frame images referred to for detecting motion vectors of adjacent blocks adjacent to a coding target block, a target reference frame image referred to for detecting a motion vector of the target block, and a target frame image being the frame image of the coding target, or based on time information thereof, a correction of scaling the motion vectors of the adjacent blocks on the basis of the target reference frame image; 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

05/17/18 / #20180139155

Information processing device and program

Selection unit 112 selects one of a plurality of determination condition for determining whether to change the status of content, which preview information is displayed in a predetermined area, to a viewed status. Determination unit 113 determines whether to change the status of content, which preview information is displayed in a predetermined area, to the viewed status based on the selected determination condition. ... Ntt Docomo Inc

05/17/18 / #20180139020

User terminal and radio base station

The present invention is designed so that communication can be carries out adequately even when the number of component carriers that can be configured in a user terminal is expanded from that in existing systems. According to one aspect of the present invention, a user terminal communicates by using a plurality of component carriers (ccs), and has a data buffering section that stores uplink data, a generating section that generates a bsr mac ce (medium access control control element), in which a given index corresponding to a buffer size is included, based on bsr (buffer status report) tables, in which amounts of uplink data that is stored (buffer sizes) and indices are associated, and a transmission section that transmits the bsr mac ce, and one of the bsr tables is a first bsr table for use when more than five ccs are configured in the user terminal.. ... Ntt Docomo Inc

05/17/18 / #20180137132

Notification control system, server apparatus, communication terminal apparatus, computer program, and notification control method

A communication terminal apparatus, upon accepting a spoken instruction from a user, generates position data indicating a position of the user, and transmits the position data and audio data indicating the instruction to a server apparatus. The server apparatus discriminates a situation in which the user in possession of the communication terminal apparatus is placed, based on acquired data, and notifies content that satisfies a predetermined notification condition to the user. ... Ntt Docomo Inc

05/10/18 / #20180132260

User terminal, radio base station and radio communication method

The present invention is designed to adequately control ul transmission in cells (for example, unlicensed bands) where listening is executed prior to transmission cell. The present invention provides a transmission section that transmits a ul signal, and a control section that controls the transmission of the ul signal based on a ul transmission command that is reported from a radio base station and based on listening that is executed before the ul signal is transmitted, and, when support is provided to transmit a dl signal and/or a ul signal from the middle of a subframe based on the result of listening, the control section transmits the ul signal in a second period, which is configured a first period after the ul transmission command is received.. ... Ntt Docomo Inc

05/10/18 / #20180132258

User apparatus, base station, and gap configuration method

A user apparatus is provided. The user apparatus performs communications with a base station in a mobile communication system in which at least two carriers with different ttis are used. ... Ntt Docomo Inc

05/10/18 / #20180132165

Base station, user equipment and broadcast information transmission and reception method

Techniques for receiving repeatedly transmitted broadcast information appropriately are disclosed. One aspect of the present invention relates to a base station including a communication control unit configured to control radio communication with user equipment and a broadcast information transmission unit configured to transmit broadcast information, wherein the broadcast information transmission unit includes scheduling information for second system information in first system information and broadcasts the second system information in accordance with the scheduling information.. ... Ntt Docomo Inc

05/10/18 / #20180132133

User equipment, base station, and communication method

There is provided user equipment for communicating with a base station in a mobile communication system including the base station and the user equipment, the user equipment including a pdcp layer processor provided with a storage unit that receives and stores a plurality of acknowledgement signals to be transmitted to the base station; and an rlc layer processor that transmits, to the pdcp layer processor, a signal transmission grant signal that indicates that transmission of an uplink signal is allowed, wherein, upon receiving the signal transmission grant signal, the pdcp layer processor transmits, to the rlc layer processor, an acknowledgement signal that is received most recently among the plurality of acknowledgement signals.. . ... Ntt Docomo Inc

05/03/18 / #20180124774

User apparatus and uplink control information bit width 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 capability information of the user apparatus to the base station; reception means configured to receive configuration information from the base station; bit width determination means configured, 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 bit width of a rank indicator based on the predetermined additional information.. . ... Ntt Docomo Inc

05/03/18 / #20180124752

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

The present invention is designed to reduce the decrease of throughput in communication by user terminals that are limited to using a partial narrow band in a system band as a band for their use. According to one aspect of the present invention, a user terminal, in which the band to use is limited to a partial narrow band in a system band, has a control section that selects a predetermined narrow band set that is formed with a plurality of narrow bands, and a receiving section that receives a downlink signal in a narrow band that is included in the predetermined narrow band set, and the control section selects the predetermined narrow band set from a plurality of narrow band sets, to which different frequency shifts are applied.. ... Ntt Docomo Inc

05/03/18 / #20180124256

Communication terminal device, incoming call control method, and program

A communication terminal device is a mobile communication terminal device that carries out communication for voice calls. In the case where an incoming voice call is received, the communication terminal device measures an orientation and a displacement of the device itself, and determines whether or not a condition occurring when a user picks up the device in his/her hand is met. ... Ntt Docomo Inc

05/03/18 / #20180124255

Communication terminal device, outgoing call control method, and program

A communication terminal device is a mobile communication terminal device that carries out communication for voice calls. The communication terminal device measures an orientation and a displacement of the device itself, and determines whether or not a condition occurring when a user picks up the device in his/her hand is met. ... Ntt Docomo Inc

05/03/18 / #20180122394

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

An audio signal transmission device for encoding an audio signal includes an audio encoding unit that encodes an audio signal and a side information encoding unit that calculates and encodes side information from a look-ahead signal. An audio signal receiving device for decoding an audio code and outputting an audio signal includes: an audio code buffer that detects packet loss based on a received state of an audio packet, an audio parameter decoding unit that decodes an audio code when an audio packet is correctly received, a side information decoding unit that decodes a side information code when an audio packet is correctly received, a side information accumulation unit that accumulates side information obtained by decoding a side information code, an audio parameter missing processing unit that outputs an audio parameter upon detection of audio packet loss, and an audio synthesis unit that synthesizes decoded audio from the audio parameter.. ... Ntt Docomo Inc

04/19/18 / #20180110059

Radio resource scheduling method, radio base station, and mobile station

According to an aspect of the present invention, there is provided a radio resource scheduling method, wherein the method includes generating format information, wherein the format information specifies a format of resource allocation information, the format corresponding to a number of a plurality of mobile stations that simultaneously perform communication with the radio base station; generating the resource allocation information provided with the format specified by the format information corresponding to radio resources allocated to the plurality of mobile stations; and transmitting, to the plurality of mobile stations, the resource allocation information.. . ... Ntt Docomo Inc

04/19/18 / #20180110044

User equipment and d2d communication method

User equipment to be used in a communication system supporting d2d communication includes a setting unit that receives d2d gap configuration information from a base station, and sets a d2d gap based on the d2d gap configuration information; and a communication unit that monitors a d2d signal in a different frequency using the d2d gap, wherein the d2d gap that is set based on the d2d gap configuration information is a time interval with a predetermined time length in a time domain, the time interval being allocated based on a time hopping pattern.. . ... Ntt Docomo Inc

04/19/18 / #20180110037

User apparatus and method for transmitting control information

A user apparatus used in a mobile communication system supporting d2d communication includes a broadcast channel information transmitter configured to transmit configuration information of a resource for another user apparatus to receive d2d control information, and information representing that the d2d control information is to be transmitted by using a broadcast channel for d2d; and a control information transmitter configured to transmit the d2d control information by using the resource.. . ... Ntt Docomo Inc

04/19/18 / #20180110001

User terminal and radio communication method

According to the present invention, in the case where a relaying operation is applied using a user terminal that supports d2d, the power consumption of a user terminal that is used as a relay node can be suppressed. A user terminal is configured to connect with a radio base station and another user terminal, and configured to relay transmission between the radio base station and the other user terminal. ... Ntt Docomo Inc

04/19/18 / #20180109971

User terminal, radio base station and radio communication method

The present invention is designed to optimize the uplink random access procedure even when coverage enhancement is applied to communication by user terminals, in which the bandwidth for use is limited to partial reduced bandwidths in a system bandwidth. A user terminal, in which the bandwidth to use is limited to a partial reduced bandwidth in a system bandwidth, has a receiving section that receives information related to repetitious transmission of a prach (physical random access channel); and a transmission section that transmits the prach in repetitions in part or all of subframes based on the information related to repetitious transmission.. ... Ntt Docomo Inc

04/19/18 / #20180109305

Radio communication control method and radio communication system

A number lr of receive beamforming circuits provided in a receive beamformer execute receive beamforming (nr/lr) times with respect to a received signal vector received by nr reception antennas ar, thereby generating a receive beamforming (bf) output vector having nr receive bf output components. A calculation processor calculates a reception power for each of the nr receive bf output components, selects lr receive bf output components in decreasing order of reception power, and determines a suitable receive bf weight matrix including lr reception orthogonal bf weight vectors corresponding to the selected receive bf output components.. ... Ntt Docomo Inc

04/19/18 / #20180109301

Mobile station, radio base station, and radio communication method

According to an aspect of the present invention, a mobile station, which carries out communication using a plurality of antenna ports, includes a receiving section configured to receive, from a radio base station, first-amount information that indicates a number of antenna ports in a first dimension, and second-amount information that indicates a number of antenna ports in a second dimension; and a transmitting section configured to transmit, to the radio base station, a precoding matrix codebook index that is obtained using the first-amount information and/or the second-amount information. Accordingly, a mobile station, a radio base station and a radio communication method can be provided in which a precoding matrix for a two-dimensional antenna array can be generated with flexibility.. ... Ntt Docomo Inc

04/19/18 / #20180109299

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

To suppress deterioration of reception characteristics of a user terminal even in the case where a radio base station performs power multiplexing on downlink mimo signals to transmit, a radio base station according to one aspect of the present invention has a transmission section that performs power multiplexing on downlink signals to a plurality of user terminals each having a mimo (multiple-input multiple-output) configuration to transmit, and a control section that controls a pmi (precoding matrix indicator) and/or an ri (rank indicator) applied to the downlink signals, where the transmission section transmits information on the pmi and/or the ri of another user terminal subjected to power multiplexing to a predetermined user terminal.. . ... Ntt Docomo Inc

04/19/18 / #20180109285

User terminal, radio base station and radio communication method

The present invention is designed to reduce the decrease of spectral efficiency even when repetitious transmission is applied to communication by user terminals, in which the band to use is limited to a partial narrow band in a 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 a system band, has a receiving section that receives information related to spreading codes, a generation section that generates uplink signals, and a transmission section that repeats transmitting uplink signals in a plurality of subframes, and the generation section applies a predetermined spreading code to an uplink signal that is transmitted in part or all of the plurality of subframes, based on the information related to spreading codes.. ... Ntt Docomo Inc

04/12/18 / #20180103386

User terminal and radio communication method

The present invention is designed to implement efficient rrm measurements in laa. A user terminal has a control section that controls the transmission and receipt of signals in a first frequency carrier where lbt (listen before talk) is configured, and a transmitting/receiving section, and the control section exerts control so that, in a dmtc (discovery measurement timing configuration) period, a downlink control channel detection operation is not performed in the first frequency carrier, and only an operation for receiving a discovery reference signal for rrm (radio resource management) measurement is performed.. ... Ntt Docomo Inc

04/05/18 / #20180098369

User apparatus, mobile communication system and communication control method

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

04/05/18 / #20180097552

Beam selecting method, base station, and user equipment

A user equipment used in a mobile communication system that has multiple antenna ports configured to receive a first reference signal from a base station is disclosed. The antenna ports are configured to transmit the first feedback information for the first reference signal. ... Ntt Docomo Inc

03/29/18 / #20180092019

User equipment apparatus

A user equipment apparatus acting as a relay terminal to relay data between a remote terminal and a base station includes a transmission unit configured to transmit to the remote terminal a groupcast id which is a destination for the data; a reception unit configured to receive a connection release request from the remote terminal; and a connection management unit configured to release a connection to the remote terminal when the connection release request is received from the remote terminal.. . ... Ntt Docomo Inc

03/29/18 / #20180092008

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

A user terminal selects small cells in a radio communication system in which a macro cell and small cells are arranged to overlap each other. In the cell selection method of the present invention, a macro base station to form a macro cell carries out the steps of determining the offset value to use in cell selection in a user terminal based on transmission property information of a second carrier in the small cell, and reporting the offset value to the user terminal. ... Ntt Docomo Inc

03/29/18 / #20180091207

Base station, user equipment, and method for determining precoding matrix

A base station that communicates with a user equipment using multiple antenna ports includes an uplink channel estimation unit that estimates uplink channel states, a downlink channel estimation unit that estimates downlink channel states based on the estimated uplink channel states and channel reciprocity of uplink and downlink, a receiver unit that receives from the user equipment csi feedback information, and a precoder generating unit that determines a precoding matrix of downlink based on channel state information (csi) indicating the estimated downlink channel states and on the csi feedback information.. . ... Ntt Docomo Inc

03/22/18 / #20180084540

User terminal, radio base station and radio communication method

The present invention is designed so that ul transmission can be carried out adequately even when communication is carried out by using a plurality of ccs of varying communication qualities. A user terminal communicates with a radio base station by using a first cc and a second cc, and has a generating section that generates uplink control information based on dl signals transmitted from the radio base station, a transmission section that transmits uplink control information, and a control section that controls the transmission of the uplink control information, wherein, when transmission of an uplink shared channel is indicated in the first cc, the control section controls the transmission of the uplink control information by using the uplink shared channel of the first cc, and, when transmission of an uplink shared channel is indicated in the second cc and the transmission of the uplink shared channel is not indicated in the first cc, the control section controls the transmission of the uplink control information by using an uplink control channel of the first cc.. ... Ntt Docomo Inc

03/22/18 / #20180084480

User apparatus and base station

A user apparatus that is used in a mobile communication system that supports d2d communication, and that includes a capability for becoming a relay apparatus for relaying data communication between a remote user apparatus and a base station, including: a transmission unit configured to transmit a measurement resource that is used for the remote user apparatus to select a relay apparatus from among candidates of relay apparatuses, and a layer 2 address of the user apparatus; and a response unit configured to receive, from the remote user apparatus, an assignment request of an address for data communication by the relay, and to transmit information of the address to the remote user apparatus.. . ... Ntt Docomo Inc

03/22/18 / #20180084454

User terminal, radio communication system, and radio communication method

Harq-ack is appropriately transmitted during enhanced carrier aggregation. A user terminal that can communicate with a radio base station by using six or more component carriers includes: a receiving section that receives scheduling information transmitted from the radio base station; a control section that determines based on the scheduling information to apply spatial bundling of a transmission acknowledgement signal only to a component carrier that the spatial bundling is applicable to; and a transmission section that transmits the transmission acknowledgement signal by using a pucch format 3.. ... Ntt Docomo Inc

03/22/18 / #20180084249

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

03/22/18 / #20180083761

Mobile terminal apparatus, base station apparatus and communication control method

A user apparatus includes a transmission/reception circuit that transmits an uplink signal and receives a downlink signal; and a control circuit that switches to transmitting, as the uplink signal, an uplink control signal or a random access channel signal within a time interval configured of a plurality of symbols, after a given interval that is provided to prevent transmission of the uplink signal and reception of the downlink signal from overlapping each other within the time interval, by using a format in which first several symbols are blanked in the time interval.. . ... Ntt Docomo Inc

03/15/18 / #20180077698

User terminal, radio base station and radio communication method

The present invention is designed so that ul transmission can be made adequately even when transmission of uplink control information using secondary cells (scells) is made configurable. A user terminal communicates with a radio base station by using carrier aggregation, and has a receiving section that receives a dl signal transmitted from the radio base station, a transmission section that transmits uplink control information that is generated based on the dl signal received, and a control section that controls transmission of the uplink control information, and, in this user terminal, the control section controls the transmission of the uplink control information using an uplink control channel and controls the transmission of the uplink control information using an uplink shared channel in each of a plurality of cell groups, each cell group including at least one component carrier (cc).. ... Ntt Docomo Inc

03/15/18 / #20180077422

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

A video processing system provided with video encoding apparatus 1 and video decoding apparatus 2. The encoding apparatus 1 outputs a maximum delay time that is incurred by backward prediction, in addition to encoded data d1 resulting from encoding of video data d0. ... Ntt Docomo Inc

03/08/18 / #20180070360

Mobile communication system

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

03/08/18 / #20180070352

User terminal, radio base station and radio communication method

The present invention is designed so that ul transmission can be made adequately even when transmission of uplink control information using secondary cells (scells) is made configurable. A user terminal communicates with a radio base station by using carrier aggregation, and has a generating section that generates uplink control information based on a dl signal transmitted from the radio base station, and a control section that controls transmission of the uplink control information, and the control section controls the transmission of the uplink control information by applying simultaneous transmission of an uplink control channel and an uplink shared channel to each of a plurality of cell groups, each including at least one component carrier (cc).. ... Ntt Docomo Inc

03/08/18 / #20180070101

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

03/08/18 / #20180068669

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

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

03/01/18 / #20180063819

Radio base station, user terminal and radio communication method

To suppress deterioration of reception characteristics even in the case where a radio base station performs power multiplexing on downlink signals to transmit, a radio base station according to one aspect of the present invention has a transmission section that performs power multiplexing on downlink signals to a plurality of user terminals each having a mimo configuration to transmit, and a control section that controls a phase rotation applied to the downlink signal to each user terminal, where the control section controls so as to apply different phase rotations to the downlink signals.. . ... Ntt Docomo Inc

03/01/18 / #20180062776

User apparatus and base station

A user apparatus communicating with a first base station and a second base station in a communication system which supports carrier aggregation is provided. The user apparatus includes a measurement unit configured to measure a timing gap between a reception timing of a first radio signal received from the first base station and a reception timing of a second radio signal received from the second base station; and a transmission unit configured to transmit the information indicating the timing gap measured by the measurement unit to the first base station or the second base station.. ... Ntt Docomo Inc

02/22/18 / #20180054828

Radio base station and mobile station

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

02/22/18 / #20180054622

Method and apparatus for motion compensation prediction

The invention relates to a motion compensation performed under an inter-frame prediction. A fractional sample interpolation is applied on retrieved samples to generate fractional samples. ... Ntt Docomo Inc

02/22/18 / #20180054512

Device and method for using appropriate telephone number for call connection

A telephone sends, in accordance with a user's instruction, a call connection request that includes a source telephone number and a destination telephone number to a connecting device or voip server device that corresponds to the source telephone number. Management server device, upon identifying a set of a source telephone number and a destination telephone number that is more appropriate than a set of those included in the call connection request, sends a notice to the telephone to prompt a user to change the telephone numbers. ... Ntt Docomo Inc

02/15/18 / #20180049218

Base station

Mapping schemes of data flows to radio bearers in flow-based qos control are disclosed. One aspect of the present invention relates to a base station including a data flow reception unit configured to receive a data flow having a flow identifier and a flow priority via one or more tunnels and a data flow mapping unit configured to map the received data flow to a radio bearer in accordance with mapping based on one or more of the flow identifier, the flow priority and the tunnels.. ... Ntt Docomo Inc

02/15/18 / #20180049103

User device and restriction method

A user device that communicates with a network apparatus and in which at least one application is installed. The user device includes a receiver that receives, from the network apparatus, restriction information including a destination identifier for identifying an external network connected to the network apparatus and a barring rate associated with the destination identifier, and a controller that when communication is to be started by the application, controls whether to allow or prevent the communication by the application based on the restriction information.. ... Ntt Docomo Inc

02/15/18 / #20180049044

Radio communication method, radio base station and radio communication system

The present invention is designed to shorten the time that a user terminal takes to detect the common control/reference signals while coverage of the common control/reference signals transmitted from a small base station is secured. As the radio communication method of the invention, a radio communication method is provided in which beam forming information for forming transmission beams directed from the small base station to the user terminal are generated based on position-related information of the user terminal acquired by communication between the macro base station and the user terminal using a coverage carrier and position-related information of the small base station, and the small base station precodes at least one of a common control signal and a reference signal that are common in a small cell based on the beam forming information and transmits the precoded signal from a plurality of transmitting antennas using a capacity carrier.. ... Ntt Docomo Inc

02/15/18 / #20180048983

Gateway device, and bearer setting control method

In a gateway device that is provided between a radio base station and a terminal device of a mobile communication network, the gateway device includes a storage control unit that temporarily stores data sequentially received from the terminal device in a data storage unit, and then transmits the data stored in the data storage unit to an external device connected to the mobile communication network; and a determination unit that determines a real time property of a service in the external device, and selects a method of setting a bearer to the radio base station based on the real time property.. . ... Ntt Docomo Inc

02/15/18 / #20180048906

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

A video prediction encoding device provided with a picture storage unit storing, as reference pictures to be used for encoding of a subsequent picture, one or more of reconstructed pictures restored from compressed picture data and a memory control unit to control a frame memory in the picture storage unit. When a frame size of input pictures is not more than 1/(2̂l) (where l is an integer of one or more) of a maximum frame size of pictures, the memory control unit determines that (2̂l) times the maximum number of reconstructed pictures are storable in the frame memory.. ... Ntt Docomo Inc

02/15/18 / #20180048363

Radio communication control method and radio communication system

A communication control method includes: for each of plurality of receivers ue, calculating excluding channel matrices that include a plurality of equivalent channel matrices acquired by multiplying a transmit bf weight matrix corresponding to that receiver ue by each of a plurality of channel matrices corresponding to receivers ue other than that receiver ue, acquiring a first eigenvector that is included in a right-singular matrix obtained from single value decomposition of the excluding channel matrices, the first eigenvector corresponding to a noise subspace of the excluding channel matrices, acquiring a second eigenvector that is included in a right-singular matrix obtained from single value decomposition of a product of an equivalent channel matrix including the transmit bf weight matrix corresponding to that receiver ue and the first eigenvector, the second eigenvector corresponding to a signal subspace of the product, and obtaining a precoding matrix corresponding to that receiver ue by multiplying the first eigenvector by the second eigenvector.. . ... Ntt Docomo Inc

02/08/18 / #20180041931

Gateway change method

A correspondence information storage 32 acquires correspondence information in which an enb 20, an sgw-c 60, and an sgw-u 70 are associated with each other in advance, and a connection controller 31 receives a handover request from the enb 20 and identifies a target enb 20 and a source enb 20. A connection changer 33 identifies the sgw-c 60 and the sgw-u 70 associated with the target enb 20 and identifies the sgw-c 60 and the sgw-u 70 associated with the source enb 20, with reference to the correspondence information. ... Ntt Docomo Inc

02/08/18 / #20180041904

Service allocation determination device and service allocation determination method

A service allocation determination device and service allocation determination method that can allocate a service to a slice without wasteful use of resources. In a bss/oss, a service request receiving unit receives service requirements and information indicating functions for implementing a service. ... Ntt Docomo Inc

02/08/18 / #20180040964

Radio base station

A base station performs the combination of digital precoding and analog beamforming. Transceiving antenna elements are classified into antenna groups. ... Ntt Docomo Inc

02/01/18 / #20180034597

User apparatus and transmittal acknowledgement information transmission method

A user apparatus configured to communicate with a base station in a mobile communication system that supports carrier aggregation formed by a plurality of cells including a first cell and a second cell that uses a transmission time interval (tti) length different from a tti length of the first cell, including a reception unit configured to receive downlink data transmitted from the base station in the second cell, and generate transmittal acknowledgement information for the downlink data; and a transmission unit configured to bundle a plurality of pieces of transmittal acknowledgement information, generated in the reception unit, for a plurality of pieces of downlink data into one piece of transmittal acknowledgement information to transmit the bundled transmittal acknowledgement information to the base station in the first cell.. . ... Ntt Docomo Inc

01/25/18 / #20180027568

User terminal, radio base station and radio communication method

The present invention is designed reduce the increase of load in user terminals even when the number of ccs that can be configured in a user terminal is expanded from that of existing systems and/or when ca is executed using unlicensed ccs. A user terminal communicates with a radio base station by means of carrier aggregation using a plurality of component carriers (ccs), and has a receiving section that receives dl signals transmitted from each cc, a measurement section that makes measurements by using the dl signals, and a control section that controls the receiving operations in the receiving section and the measurement operations in the measurement 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, receiving operations and/or measurement operations that are different from those of the second cc.. ... Ntt Docomo Inc

01/25/18 / #20180027501

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

A radio communication method is provided in which a local area base station apparatus, arranged in a wide area where a first carrier frequency is used and forming a local area that is narrower than the wide area, transmits a downlink signal, using a second carrier frequency, which belongs to a different frequency band from the first carrier frequency and which has a wider bandwidth than the first carrier frequency, the local area base station apparatus transmits a detection signal that is used to detect the local area base station apparatus in the mobile terminal apparatus, and the local area base station apparatus transmits the downlink signal for the mobile terminal apparatus with transmission power that is determined based on the path loss of the detection signal received in the mobile terminal apparatus.. . ... Ntt Docomo Inc

01/18/18 / #20180020479

Radio base station, user terminal and radio communication method

The present invention is designed to optimize the rrm measurements in a carrier where an lbt function is applied. A radio base station executes lbt (listen before talk) in an unlicensed carrier, acquires an lbt result, determines the timing to measure a drs (discovery reference signal) that is transmitted in the unlicensed carrier, and transmits the lbt result and the measurement timing to a user terminal, and the user terminal receives the lbt result and the drs measurement timing from the radio base station, and detects the unlicensed carrier by measuring the drs that is transmitted in the unlicensed carrier based on the lbt result, based on the lbt result and the measurement timing.. ... Ntt Docomo Inc

01/18/18 / #20180020445

User terminal, radio base station, and radio communication method

The present invention is designed to allow adequate communication even when the number of ccs that can be configured in a user terminal is expanded from that of existing systems and/or when ca is executed using unlicensed ccs. A user terminal communicates with a radio base station by means of carrier aggregation using a plurality of component carriers (ccs), and has a receiving section that receives dl signals transmitted from each cc, a transmission section that transmits ul signals, and a control section that controls 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, ul signal transmission operations that are different from those of the second cc.. ... Ntt Docomo Inc

01/18/18 / #20180019898

User equipment, base station, information reporting method, and information receiving method

There is provided user equipment for communicating with a base station in a radio communication system supporting carrier aggregation, the user equipment including a generator that generates band combination information indicating one or more band combinations capable of being used for the carrier aggregation in the user equipment; and a transmitter that transmits the generated band combination information to the base station, wherein the generator generates the band combination information including highest band combination information indicating a highest band combination having a largest number of ccs to be combined, among the one or more band combinations capable of being used for the carrier aggregation in the user equipment.. . ... Ntt Docomo Inc

01/18/18 / #20180019851

User terminal, radio base station and radio communication method

The present invention is designed so that uplink control signals can be transmitted adequately even when the number of component carriers that can be configured in a user terminal is expanded. A user terminal can communicate by using six or more component carriers, and has a receive receiving section that receives a dl signal, a transmission section that transmits a ul control signal, which includes a delivery acknowledgement signal in response to the dl signal, and a control section that controls a format to apply to the ul control signal, and the control section applies a format, having large capacity in comparison to a pucch format of an existing system in which the number of component carriers to be configured is five or less, to the ul control signal.. ... Ntt Docomo Inc

01/11/18 / #20180014291

User terminal, radio base station and radio communication method

The present invention is designed so that cross-carrier scheduling is carried out adequately even when the number of component carriers that can be configured in a user terminal is expanded compared to that of existing systems. A user terminal can communicate by using six or more component carriers, and has a receiving section that receives downlink control information including a carrier indicator field (cif); and a control section that controls a receiving process of a downlink shared channel and/or a transmission process of an uplink shared channel in a predetermined component carrier based on the cif, and the receiving section receives downlink control information including the same cif value from different component carriers; and the control section determines the predetermined component carrier, considering an offset that is configured to a cif value of each component carrier that transmits downlink control information including the cif.. ... Ntt Docomo Inc

01/11/18 / #20180014281

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. According to an example of the present invention, a user terminal, in which the bandwidth to use is limited to a partial reduced bandwidth in a system bandwidth, has an acquiring section that acquires epdcch (enhanced pdcch) configuration information based on information that is reported from a radio base station without using a pdcch (physical downlink control channel), and a receiving section that detects a user terminal-specific search space (uss: ue-specific search space) of an epdcch based on the epdcch configuration information.. ... Ntt Docomo Inc

01/11/18 / #20180014219

User terminal, radio base station and radio communication method

The present invention is designed to measure and/or report csi (channel state information) of a plurality of narrow bands, even when the band to use is limited to a partial narrow band in a system band. According to one aspect of the present invention, 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 information related to csi (channel state information) measurement in a narrow band, a measurement section that measures csis in a plurality of narrow bands based on the information related to csi measurement, and a transmission section that reports the measured csis.. ... Ntt Docomo Inc

01/11/18 / #20180014032

Image prediction encoding/decoding system

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

01/04/18 / #20180007682

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

A channel state is adequately reported even if the number of component carriers configurable to a user terminal is expanded to six or more. The user terminal for communicating with a radio base station by use of six or more component carriers includes a measuring section configured to measure reception quality of a downlink channel of each of the component carriers, and a transmission section configured to periodically transmit information relating to the reception quality in accordance with timing specified from the radio base station. ... Ntt Docomo Inc

01/04/18 / #20180007585

User terminal and radio communication method

The present invention is designed so that broadcast information is transmitted and received adequately even when the bandwidth to use is limited to partial reduced bandwidths in a system bandwidth and the broadcast information is transmitted and received in repetitions over multiple subframes. A user terminal, in which the bandwidth to use is limited to a partial reduced bandwidth in a system bandwidth, has a receiving section that receives first system information and second system information, and a control section that acquires transmission information, which includes the repetition factor for the second system information, from the first system information, and the receiving section receives the second system information based on the transmission information.. ... Ntt Docomo Inc

01/04/18 / #20180007534

Mobility management switching center, communication system, and communication control method

A mobility management switching center is for communicating with user equipment of a communication system that supports lte or 3g, the mobility management switching center including a receiver that receives a session management signal from the user equipment; and a transmitter that transmits, when the session management signal is received, a restriction signal for instructing not to transmit a new session management signal to the user equipment.. . ... Ntt Docomo Inc

01/04/18 / #20180000377

Information processing device, calorie management system, caloric balance estimation method, and program

A calculation device is provided with: an acquisition unit that acquires an acetone concentration in a gas constituent discharged from a user and measured; an estimation unit that estimates a calorie balance corresponding to the acetone concentration acquired by the acquisition unit based on a predetermined correlative relationship between acetone concentrations and calorie balance; and a processing execution unit that executes predetermined processing using an estimation result of the estimation unit.. . ... Ntt Docomo Inc








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