Fujitsu Corporation

Fujitsu Connected Technologies Limited

Jianming Wu

Hua Zhou

Yuantao Zhang

Yi Wang

Yi Zhang

Tomohiko Taniguchi

Jun Tian

Yoshiaki Ohta

Yuanrong Lan

Jian Wang

Haibo Xu

Tsuyoshi Shimomura

Hongyang Chen

Jian Zhang

Kazuhisa Obuchi

Jie Zhang

Hongchao Li

Yoshihiro Kawasaki

Takayoshi Ode

Daisuke Jitsukawa

Mitsuhiro Azuma

Jinyin Xue

Xin Wang

Yoshinori Tanaka

Takashi Dateki

Pengyu Ji

Eisuke Fukuda

Yueqiao Xu

Aihuang Guo

Wei Luo

Jike Li

A base station includes a memory and a processor coupled to the memory and configured to transmit, when a state transition of a mobile station is performed, a first control signal to the mobile station, and perform control to simultaneously transmit the first control signal and a second control signal different from the first control signal to the mobile station when a first state transition, which causes a state of the mobile station to transfer from a first state to a second state, is performed, and then a second state transition, which causes the state of the mobile station to transfer from the second state to a third state, is performed.

Wireless communication system, base station, mobile station, and method of wireless communication

A base station device that allocates wireless resources to a terminal device and performs wireless communication with the terminal device using the allocated wireless resources, the base station device includes, deciding controller that decides, out of a plurality of retransmission patterns, a retransmission pattern for performing retransmission of data to the terminal device, in accordance with a communication state of wireless communication, and a transmitter that performs initial-time transmission processing of transmitting a control signal for wireless resource allocation control, and a data signal for data transmission including data to be transmitted to the terminal device, including retransmission pattern information relating to the retransmission pattern that has been decided, and retransmission processing of retransmitting the data signal including data to be transmitted to the terminal device, in accordance with the retransmission pattern that has been decided.

Base station device, terminal device, wireless communication system, and wireless communication method

A base station device includes: a storage that stores a group indicating unit data subject to retransmission out of predetermined number of unit data included in transmission data to be transmitted to a terminal device, and identification information to identify the group, in an associated manner; a receiver that receives, from the terminal device, identification information corresponding to transmission data transmitted to the terminal device; a communication controller that refers to the storage based on the received identification information, and that determines retransmission of unit data included in a group corresponding to the received identification information out of the transmission data; and a transmitter that transmits unit data included in the group determined to be retransmitted by the communication controller, to the terminal device.

Base station device, and terminal device for retransmitting group of unit data

A resource indication method and apparatus and a communication system. The method includes: determining indication information, the indication information is used to indicate a second uplink resource in a second uplink frequency resource segment; wherein, the second uplink frequency resource segment or the second downlink frequency resource segment includes a second downlink predetermined number of second downlink resource block groups; and transmitting the first indication information to the UE in a first downlink frequency resource segment; wherein, the first downlink frequency resource segment or the first uplink frequency resource segment to which the first downlink frequency resource segment corresponds includes a first predetermined number of first uplink resource block groups, the first predetermined number being unequal to the second predetermined number; and wherein, the first indication information is bitmap information, a bit number of the bitmap information is determined according to the first predetermined number.

Resource indication method and apparatus and communication system

A base station device including: a transmitter configured to transmit a transport block that includes a plurality of code block groups; and a receiver configured to receive a confirmation signal which indicates that one or more code block groups of the plurality of code block groups has not been successfully received, wherein the transmitter transmits a control signal when the receiver receives the confirmation signal, and the control signal comprises first information that indicates the one or more code block groups to be retransmitted and second information that indicates data is combined with the one or more code block groups being retransmitted and earlier received one or more code block groups stored in a buffer.

Base station device, user equipment, wireless communication system, and communication method

A terminal device includes a processor circuitry and a receiver. The processor circuitry is configured to perform dual connectivity with a cell group and a different cell group, and to control transmission power sharing between the cell group and the different cell group. The receiver is configured to receive a signal on the cell group and the different cell group.

Transmission power sharing between dual connectivity cell groups

A base station device includes: a processor circuitry configured to generate an indication signal; and a transmitter configured to transmit the indication signal to a terminal device. The indication signal indicates that there is no transmission of first data to be scheduled in a resource, and the resource may be assigned second data to be transmitted at low latency.

Base station device, terminal device, and transmission method

A method for resource allocation, method for channel state information transmission, base station and user equipment. Wherein the method for resource allocation includes: determining, by a base station, that it is necessary for a UE to report aperiodic CSI of relevant downlink CCs; and allocating, by the base station, corresponding resources to the UE according to the number of the relevant downlink CCs. The base station allocates corresponding resources to the UE in accordance with the number of relevant downlink CCs, resource allocation is flexible, and the transmission of UCI in case of multiple carriers is supported.

Method for resource allocation, method for channel state information transmission, base station and user equipment

A base station device includes: a transmitter configured to transmit a transport block that includes a plurality of code block groups; and a receiver configured to receive a confirmation signal which indicates that one or more code block groups of the plurality of code block groups has not been successfully received. The transmitter configured to transmit a control signal. The control signal comprises a first information indicates the one or more code block groups to be retransmitted and a second information bit indicates either the one or more code block groups being retransmitted are combinable with the received one or more code block groups or the received one or more code block groups corresponding to the one or more code block groups being retransmitted is corrupted.

Embodiments of the present invention provide a method and apparatus for triggering aperiodic feedback in coordinated multipoint transmission. The method includes: transmitting, by an eNB to UE, dynamic control information (DCI) and preconfigured feedback sets corresponding to the DCI, so that the UE aperiodically feeds back corresponding channel state information (CSI) according to the DCI and the feedback sets corresponding to the DCI; wherein the preconfigured feedback sets corresponding to the DCI are classified according to a triggered transmitting point or a CSI-RS of non-zero power, or are classified according to configured CSI, or are classified according to an interference type. With the method and apparatus of the embodiments of the present invention, a relatively good tradeoff between flexibility of aperiodic CSI feedback and signaling load in a CoMP transmission process or a joint transmission process of CoMP and CA may be achieved.

Method and apparatus for triggering aperiodic feedback in coordinated multipoint transmission

Embodiments of the present invention provide a random access method and apparatus and system. Where, the method includes: selecting randomly, by UE, a physical random access channel (PRACH) resource for transmitting a preamble from multiple PRACH resources pre-configured by an eNB for the UE; and transmitting the preamble by the UE on a selected PRACH resource, so that the eNB transmits a random access response to UE to which a correctly demodulated preamble corresponds according to preambles transmitted by UEs. With the method and apparatus of the embodiments of the present invention, coverage performance of an uplink channel and a downlink channel may be improved.

Random access method and apparatus and system

Embodiments of the present invention provide a measurement method for channel state information, user equipment and a base station. The measurement method includes: selecting one or more coordinated transmission points for coordinated multipoint transmission by the base station for user equipment; and independently configuring a measurement subset used for channel state information feedback for each base station and each coordinated transmission point, so that the user equipment performs measurement according to the measurement subset. With the embodiments of the present invention, channel state information feedback configuration is performed to each cell or transmission point participated in coordination, and a unified structural design for feedback information may be used, so that channel feedback information for multiple transmission points or multiple cells can serve for not only transmission of a single cell, but also transmission of multiple cells.

Measurement method for channel state information, user equipment and base station

A digital communication system including a terminal and a plurality of base stations. The terminal includes receiving of a first control channel which is transmitted only from the first base station, the received first control channel is configured to indicate resource assignment for both data transmitted from the first base station and data coordinately transmitted from the second base station, and is configured to indicate new data or retransmission data. The terminal a second control channel including first control information and second control information only to the first base station. The first control information is channel state information, and the second control information is Hybrid Automatic Repeat reQuest (HARQ) acknowledgement information for the received data coordinately transmitted. The second control information is based on a result of the HARQ process of the received data coordinately transmitted, and the second control channel is transmitted only to the first base station.

Communication transmission system, digital wireless communication transmission system, devices, and method of digital communication

A wireless communication system, includes a first wireless base station; a second wireless base station that performs a coordinated transmission; and a wireless terminal, wherein the wireless terminal includes a reception control unit that identifies a physical downlink channel transmitted from any of the first and second wireless base station according to one or more reference signals; a data reception unit that is capable of receiving data transmitted by the first wireless base station using a resource indicated by a first control channel and receiving data coordinately transmitted by the second wireless base station using a resource indicated by the received first control channel, a control channel transmission unit that transmits a second control channel and the reception control unit further controls Hybrid Automatic Repeat reQuest (HARQ) process for data coordinately transmitted by the first wireless base station and the second wireless base station based on the first control channel.

Wireless base station device using coordinated HARQ communication system, wireless terminal device, wireless communication system, and wireless communication method

Growing community of inventors

Beijing, China

Jianming Wu