Abstract: 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.

Abstract: A base station device includes: a receiver that receives an allocation request that requests allocation of a radio resource that is used to transmit first data; a scheduler that allocates, to the first data when the allocation request is received by the receiver, a part of an uplink radio resource allocated to second data for which a larger delay than a delay allowed for the first data is allowed; and a transmitter that transmits an uplink indication signal indicating that the part of the uplink radio resource is allocated to the first data by the scheduler.

Abstract: 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.

Abstract: A base station device includes: a processor that executes a process including generating first data, generating an indication signal including a plurality of bits that indicate whether second data that is transmitted at a lower latency than the first data is generated, and generating a transmission signal by mapping the generated indication signal and one of the first data and the second data to each of predetermined unit areas of a resource; and a transmitter configured to transmit the transmission signal generated by the processor.

Abstract: A wireless device is used in a wireless communication system that includes a base station for controlling communication in which a time division duplex frame including at least one uplink subframe and at least one downlink subframe is transmitted. The wireless device includes: a request transmitter that transmits a request for performing D2D (device-to-device) communication to the base station; a receiver that receives position information to indicate a position at which a blank subframe is allocated in the time division duplex frame from the base station; and a scheduler that determines a schedule for D2D communication based on the position information and reports the schedule to a corresponding wireless device. The blank subframe is configured to include a symbol for control signal and a plurality of blank symbols in which no signal is transmitted from the base station.

Abstract: A communication system includes: a group including a plurality of communication terminals; and a base station. A first communication terminal in the group includes: an estimation unit that estimates path loss between the first communication terminal and the base station; and a transmission unit that transmits information about the estimated path loss to the base station. The base station includes: a reception unit that receives information about the path loss transmitted from the first communication terminal; and a transmission unit that transmits the received information about the path loss to second communication terminals other than the first communication terminal in the group. Each of the second communication terminals includes: a reception unit that receives the information about the path loss transmitted from the base station; and a determination unit that determines transmit power of the second communication terminal based on the received information about the path loss.

Abstract: 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.

Abstract: 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.

Abstract: A base station apparatus includes: first processor circuitry that generates a first signal indicating first candidates for a transmission timing, wherein the first candidates are selected from a second candidates; second processor circuitry that generates a second signal specifying one transmission timing from the first candidates for the transmission timing indicated by the first signal; and a transmitter that transmits the first signal and the second signal.

Abstract: 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.

Abstract: A base station device communicates with a user equipment by using a frame including a downlink region in which a signal for a downlink is allocated and an uplink region in which a signal for an uplink is allocated. The base station device includes: a guard period determination unit, a frame configuration determination unit, a notification unit, and a communication circuit. The guard period determination unit determines a length of a guard period provided between the downlink region and the uplink region based on a transmission delay between the base station device and the user equipment. The frame configuration determination unit determines a configuration of the frame based on the length of the guard period. The notification unit notifies the user equipment of configuration information that indicates the configuration of the frame. The communication circuit communicates with the user equipment based on the configuration of the frame.

Abstract: A base station includes a storage device to store results of carrier sensing performed respectively on a data transmission side and on a data reception side with respect to a plurality of sub-bands in unlicensed frequencies being the frequencies of which a use is not licensed for data transmission, and a controller to extract sub-bands of the unlicensed frequencies being determined that are in an idle status or have high possibility to be in the idle status by both of the data transmission side and the data reception side in the carrier sensing results as candidates for sub-bands of the unlicensed frequencies to be used for transmitting data by the data transmission side.

Abstract: A wireless communication system includes: a base station; a relay node; and a wireless equipment configured to receive a downlink signal from the base station without the relay node being involved and to transmit an uplink signal to the base station via the relay node, wherein the base station is configured to control a timing at which the wireless equipment transmits the uplink signal, with the downlink signal, using information relating to first timing advance between the base station and the relay node.

Abstract: A first communication device transmits a signal addressed to a second communication device by the use of one of resources included in a resource pool selected from a set of resource pools. On the other hand, each of third communication devices which relay the radio communication between the first communication device and the second communication device selects one resource pool from the set of resource pools in accordance with a predetermined rule which is defined on the basis of a hop count at the third communication device in the radio communication between the first communication device and the second communication device and the resource pool selected by the first communication device, and transfer the signal addressed to the second communication device by the use of one of the resources included in the selected resource pool to a next communication device in a relay order or the second communication device.

Abstract: A base station includes: a transmission circuit configured to transmit a reference signal; a reception circuit configured to receive information on a radio resource that is used for transmission of a discovery signal, or information relating to a coverage enhancement level that is determined based on the radio resource, from a relay node that receives the discovery signal which is transmitted by a wireless equipment using the radio resource that is associated with the coverage enhancement level, the coverage enhancement level being determined in accordance with reception quality measured from the reference signal; and a control circuit configured to determine the coverage enhancement level of downlink for the wireless equipment, based on information that is received by the reception circuit, and to control communication for the downlink with the wireless equipment at the determined coverage enhancement level.

Abstract: A wireless communication system includes: a plurality of terminal devices respectively configured to support D2D (Device to Device) communication; and a base station configured to control the plurality of terminal devices. A first terminal device that communicates with a second terminal device via a first D2D link receives identification information of a third terminal device from the third terminal device that communicates with a fourth terminal device via a second D2D link. The first terminal device transmits the identification information of the third terminal device received from the third terminal device to the base station. The base station controls at least one of a resource for the first D2D link and a resource for the second D2D link in such a way that the resource for the first D2D link and the resource for the second D2D link are different from each other.

Abstract: A communication device supports a D2D (Device-to-Device) communication and includes a storage, a scheduler and a transmitter. The storage stores a first resource pool information that indicates first resource pool including control resources allocated to control information for transmitting data and a second resource pool information that indicates second resource pool including data resources allocated to data. The scheduler selects a first resource for transmitting control information from the first resource pool and selects a second resource for transmitting data from the second resource pool. The transmitter transmits the control information by using the first resource and transmit the data by using the second resource. The scheduler selects the second resource from the second resource pool according to a received signal intensity in at least one of resources included in the first resource pool and the second resource pool.

Abstract: A wireless device is used in a wireless communication system that includes a base station for controlling communication in which a time division duplex frame including at least one uplink subframe and at least one downlink subframe is transmitted. The wireless device includes: a request transmitter that transmits a request for performing D2D (device-to-device) communication to the base station; a receiver that receives position information to indicate a position at which a blank subframe is allocated in the time division duplex frame from the base station; and a scheduler that determines a schedule for D2D communication based on the position information and reports the schedule to a corresponding wireless device. The blank subframe is configured to include a symbol for control signal and a plurality of blank symbols in which no signal is transmitted from the base station.

Abstract: A base station classifies at least some of radio communication apparatuses belonging to the same cell into a plurality of groups. The base station assigns to a first group a first signal sequence that is orthogonal to a cyclically shifted version thereof, and assigns to a second group a second signal sequence that is orthogonal to a cyclically shifted version thereof and that is different from the first signal sequence and from the cyclically shifted version of the first signal sequence. The radio communication apparatus belonging to the first group performs spread modulation on data using the first signal sequence or a signal sequence obtained by cyclically shifting the first signal sequence. The radio communication apparatus belonging to the second group performs spread modulation on data using the second signal sequence or a signal sequence obtained by cyclically shifting the second signal sequence.

Abstract: A wireless communication system includes a base station apparatus and a terminal device. The base station apparatus includes a processor that executes a process including mapping first control information concerning a first frequency band which needs a license to use for wireless communication, mapping second control information concerning a second frequency band which does not need the license to use for the wireless communication, and generating a control channel signal by arranging the first control information and the second control information in areas different from each other; and a transmitter that transmits the control channel signal generated by the processor to the terminal device.