Ntt Docomo, Inc.

Yousuke Sano

Satoshi Nagata

Kazuaki Takeda

Yusuke Ohwatari

Kazuki Takeda

Yukihiko Okumura

Hiroki Harada

Hideaki Takahashi

Yoshihisa Kishiyama

Daiki Takeda

Keisuke Saito

Yuta Sagae

Huiling Jiang

Hiromasa Umeda

Shinpei Yasukawa

Xin Wang

Xiaolin Hou

Yuki Matsumura

Anil Umesh

Liu Liu

Qin Mu

Nobuhiko Miki

Chongning Na

Akihito Hanaki

Shaozhen Guo

Daisuke Murayama

Akihito Morimoto

Takuma Takada

Mingyuan Yang

Teruaki Toeda

Runxin Wang

A terminal includes a reception unit that receives system information; and a control unit that sets a default channel bandwidth as a frequency bandwidth for performing communication, the default channel being set in a duration after the reception unit receives the system information until the reception unit receives configuration information of a supported channel bandwidth, in response to detecting that the reception unit does not support a channel bandwidth included in the received system information.

Terminal and communication method

A user apparatus includes a reception unit configured to receive information specifying a BWP (Bandwidth part) from a base station apparatus, a control unit configured to configure the BWP by determining a parameter to be applied from a predetermined cell-common parameter and a predetermined user-apparatus-specific parameter that are included in the information specifying the BWP, and a communication unit configured to communicate with the base station apparatus by using the configured BWP, wherein the predetermined parameters are information items indicating a lowest usable subcarrier of the BWP.

User apparatus and base station apparatus

A user equipment includes a transmission unit configured to transmit a signal; and a control unit configured to determine, according to a power class, a maximum transmission power for transmitting the signal. The control unit adjusts, according to an instruction from a base station apparatus, the maximum transmission power. The instruction includes information validating or invalidating adjustment of the maximum transmission power.

User equipment and transmission power control method

The present invention is designed to reduce the time it takes to form adequate beams, in communication using beamforming. According to one aspect of the present invention, a user terminal has a receiving section that, using temporally orthogonal radio resources, forms receiving beams and receives reference signals that are transmitted in different transmitting beams respectively, a measurement section that performs measurements based on the reference signals, and a control section that controls the forming of the receiving beams so that at least one of the reference signal is received in a given period set.

User terminal, radio base station and radio communication method

A user equipment in a radio communication system including a base station and the user equipment, the user equipment including: a resource management unit that retains configuration information of a resource capable of transmitting uplink data without receiving uplink data transmission permission from the base station; and a transmission unit that transmits a signal indicating that uplink data transmission using the resource is performed to the base station.

User equipment and communication method

A communication apparatus in a radio communication system, including: a reception unit configured to receive control information including puncture information which indicates that there is a puncture resource in resources allocated to the communication apparatus from another communication apparatus; and a decoding unit configured to decode data received from the other communication apparatus in the allocated resources, wherein the decoding unit performs the decoding using the puncture information included in the control information received by the reception unit.

Communication apparatus and data reception method

A user equipment apparatus in a radio communication system in which uplink communication and downlink communication are dynamically changed includes a reception unit configured to receive, from a base station, control information indicating a resource for an uplink demodulation reference signal in a subframe used for transmitting uplink data; and a transmitting unit configured to transmit the uplink demodulation reference signal according to the control information; wherein the resource for the uplink demodulation reference signal is multiplexed into a part of resources corresponding to one or more symbols at a beginning of a data segment in the subframe used for transmitting the uplink data.

User equipment apparatus, base station, demodulation reference signal transmission method

A terminal is disclosed including a receiver that receives a synchronization signal/physical broadcast channel (SS/PBCH) block including a synchronization signal (SS) and a physical broadcast channel (PBCH); and a processor that determines a control resource set based on configuration information in a configuration information set of a plurality of configuration information sets, the configuration information set being associated with information based on the SS/PBCH block, the configuration information being associated with a value of a field in the PBCH, and the configuration information including a plurality of parameters regarding the control resource set. In other aspects, a radio communication method and a base station are also disclosed.

User terminal and radio communication method

A user apparatus communicates with a first base station apparatus and a second base station apparatus, and the user apparatus includes a receiving unit configured to receive, from the first base station apparatus, a configuration for measuring a timing difference between the first base station apparatus and the second base station apparatus; a control unit configured to execute measurement with respect to the second base station apparatus, based on the configuration for measuring the timing difference; and a transmitting unit configured to transmit a result of the executed measurement, to the first base station apparatus, wherein the executed measurement is executed before starting to communicate with the second base station apparatus.

Terminal and method for communicating with a first base station apparatus and a second base station apparatus

Disclosed is a second base station device communicating with a first base station device. The second base station device includes a receiver configured to receive, from the first base station device, information for limiting radio resource allocation; a controller configured to allocate a radio resource based on the received information for limiting radio resource allocation; and a transmitter configured to transmit information for limiting radio resource allocation to the first base station device. The information for limiting radio resource allocation includes information indicating at least one of a frequency domain and a time domain indicating a location of a radio resource.

Base station device

Disclosed is a scheme of transmitting various types of radio signals for which interference between adjacent cells is considered in a radio communication system (for example, dynamic TDD) in which uplink communication and downlink communication can be dynamically switched. A feature of the present invention relates to user equipment including a transceiver that performs transmission and reception of a radio signal with a base station in accordance with a communication scheme in which uplink communication and downlink communication are dynamically switched and a signal processor that processes the radio signal, wherein the transceiver transmits a connection request signal generated by the signal processor in fixed uplink radio resources of the communication scheme.

User equipment and base station

A terminal and base station are disclosed where the terminal includes a receiver that receives a signal of a downlink shared channel and a processor that controls reception of a demodulation reference signal included in the downlink shared channel. The processor controls reception of a demodulation reference signal based on one of a first mapping method or a second mapping method. The first mapping method being a method in which the demodulation reference signal is mapped to a fixed symbol within a slot of the downlink shared channel, and the second mapping method being a method in which the demodulation reference signal is mapped to a top symbol of symbols for which the downlink shared channel is scheduled.

User terminal, base station, and radio communication method for mapping a demodulation reference signal

A user equipment in a mobile communication system including a base station and the user equipment, including: a mode determining unit that receives instruction information indicating a transmission mode of broadcast information from the base station and determines the transmission mode based on the instruction information; and a receiving unit that performs a reception operation of the broadcast information according to the transmission mode determined by the mode determining unit.

User equipment, base station, and broadcast information reception method

A terminal is disclosed including a processor that controls reception of a first synchronization signal (PSS), a second synchronization signal (SSS), and a broadcast channel (PBCH) in a predetermined block that is formed by a predetermined number of symbols and a predetermined number of subcarriers; and a receiver that receives the PSS, the SSS and the PBCH that form the predetermined block, wherein the PSS and the SSS are located in a first frequency domain, wherein the PBCH is located in at least part of a second frequency domain that is broader than the first frequency domain, and wherein the PBCH is located in at least part of a first predetermined domain neighboring the SSS in the frequency direction in the predetermined block and the PBCH is not located in a second predetermined domain neighboring the PSS in the frequency direction in the predetermined block.

User terminal, base station and radio communication method

Disclosed are a method and an encoder for performing polar coding on an input data sequence to generate a polar code. The encoding method including: generating, based on a first order index set, a second order index set for parent code length of the polar code, each order index of the first or second order index set representing a priority order of transmitting an information bit in a bit position indicated by the order index relative to transmitting information bits at bit positions indicated by other indexes; spreading, according to the second order index set, the input data sequence to a data sequence with bit number equal to the parent code length; performing polar coding on the spread data sequence to generate the polar code.

Growing community of inventors

Tokyo, Japan

Yousuke Sano