Abstract: A center server corresponding to a communication management device manages communication between a vehicle and an outside thereof. The center server includes: a request acquisition unit corresponding to an acquisition unit that acquires a requested bandwidth, which is a communication bandwidth requested for execution of a specific process in the vehicle, a radio resource arbitration unit corresponding to an identification unit that identifies a frequency band to which the requested bandwidth is allocated, according to a communication capacity of the vehicle, and a request response unit corresponding to a transmission unit that transmits, to the vehicle, an allocation result of allocating the requested bandwidth to the identified frequency band.

Abstract: A wireless communication device uses multiple wireless communication services for communication between an in-vehicle device of a vehicle and an external device. The wireless communication device acquires a delay characteristic value for each wireless communication service from a network device. The delay characteristic value is an upper limit of an estimated range of delay time in communication. The wireless communication device acquires an allowable delay amount indicating a length of an allowable communication delay time from the in-vehicle device. The wireless communication device allocates a wireless communication service, which is relatively small in the delay characteristic value among the wireless communication services, to the in-vehicle device that is small in the allowable delay amount.

Abstract: A communication technology for communication between at least one application and an external device uses subscriber identification modules that correspond, respectively, to wireless communication services. In the technology, first information for determination of a transmission power value is acquired for each of the wireless communication services. In the technology, second information for determination of a delay time allowed by the at least one application is acquired. In the technology, a wireless communication service is selected from among the wireless communication services for the communication based on the first information and the second information.

Abstract: Provided are wireless communication methods, a UE and an eNB. The wireless communication method performed by a UE includes transmitting transport block repetitions to an eNB, wherein one HARQ process includes multiple repetition sets of a transport block if one repetition set of the transport block is not enough for the eNB to successfully decode the transport block, each of the multiple repetition sets includes multiple repetitions of the transport block, each of the multiple repetition sets is followed by a feedback channel to indicate whether the transport block is successfully decoded by the eNB.

Abstract: An integrated circuit includes circuitry, which, in operation, controls transmitting downlink data to a terminal apparatus; receiving a plurality of transport blocks which are transmitted in a same time period using a same frequency band in a spatial multiplexing scheme, wherein a same acknowledgement information (ACK/NACK) relating to an error detection result of the downlink data is scrambled with different scrambling schemes respectively for the plurality of transport blocks and the respectively scrambled ACK/NACK is multiplexed with data on respective ones of the plurality of transport blocks, and channel quality information (CQI) of a downlink channel is multiplexed with the data on only one transport block of the plurality of transport blocks by the terminal apparatus; and extracting the ACK/NACK and the CQI from the received plurality of transport blocks.

Abstract: Provided are a user equipment and a wireless communication method for LAA. The user equipment comprises: a receiver operative to receive a UL grant which schedules a subframe for UL transmission; a first circuit operative to perform LBT; a transmitter operative to transmit a PUSCH in the scheduled subframe starting from one available starting position of multiple candidate starting positions in the scheduled subframe if the LBT is successful. According to present disclosure, it is possible to increase the possibility that PUSCH could be sent in the scheduled subframe after LBT.

Abstract: By a vehicle wireless communication device or a communication control method, short-range communication via an access point of a wireless local area network placed outside the vehicle is performed, cellular communication via a cellular base station is performed, a mobility state of the vehicle, determined, a communication path for communication between the in-vehicle device and the external device is selected, the short-range communication is more preferentially adopted, as the communication path of the in-vehicle device, than the cellular communication when the mobility state is equal to or lower than a predetermined reference level, and the cellular communication is adopted when the mobility state exceeds the predetermined reference level.

Abstract: A communication technology for communication between at least one application and an external device uses subscriber identification modules that correspond, respectively, to wireless communication services. In the technology, first information for determination of a received strength of a reference signal is acquired for each of the wireless communication services. In the technology, second information for determination of a delay time allowed by the at least one application is acquired. In the technology, a wireless communication service is selected from among the wireless communication services for the communication based on the first information and the second information.

Abstract: By a vehicle wireless communication device or a vehicle wireless communication method, for each wireless communication service, a power headroom representing a remaining power of a transmission power with respect to a predetermined maximum transmission power is calculated, a delay allowable amount is acquired, and the wireless communication service is selected for communication between at least one in-vehicle device and an external device.

Abstract: To measure the channel quality of the own cell accurately in a condition where there is no interference from a neighbor cell. A wireless communication terminal according to the invention is a wireless communication terminal to be connected to a base station for transmitting and receiving data to/from the base station, the wireless communication terminal including: a receiver that receives a signal which includes control information provided for measuring a channel quality of own cell from the base station; an extractor that extracts the control information from the signal received by the receiver; a measurement section that measures, on the basis of the control information, the channel quality of the own cell in a domain where a neighbor cell does not transmit a signal; and a transmitter that transmits a measurement result of the channel quality of the own cell measured by the measurement section, to the base station.

Abstract: Provided are an eNB, a UE and wireless communication methods. The eNB, in an embodiment, includes circuitry operative to fill a SPS activation/deactivation field in a DCI with a predetermined pattern of bits; and a transmitter operative to transmit the DCI to a first UE for the first UE to start periodically transmitting signals to a second UE or stop periodically transmitting signals to the second UE based on the SPS activation/deactivation field. The DCI is in a SPS format formed by adopting part or all bits of at least one field of DCI format 5 as the SPS activation/deactivation field, and information supposed to be transmitted in the at least one field is indicated with the assistance of or by RRC or MAC signaling.

Abstract: By a wireless communication control device that controls a wireless communication device or a wireless communication control method, identification information for identifying the access point of a target network existing on a route of a vehicle is acquired, an on-route access point of the target network on the route is identified, communication status information regarding a communication status in a target communication range to which the vehicle comes close is acquired, and a frequency channel with less interference in wireless communication in the target communication range is predicted.

Abstract: By a wireless communication control device, a wireless communication device, or a wireless communication method, a vehicle speed of a vehicle is acquired, communication status information regarding a communication status in a communication range of an access point is acquired, a communication environment in the communication range of the access point is predicted based on the acquired communication status information.

Abstract: Method of scrambling signals, transmission point device, and user equipment using the method are provided. The method includes: sending an ID table to a user equipment through higher layer signaling, the ID table being a subset of the whole ID space and containing available IDs for the user equipment; notifying the user equipment an ID in the ID table to be used through physical layer signaling or UE specific higher layer signaling; generating a random seed based on the notified ID; initializing a scrambling sequence by the random seed; and scrambling the signals with the initialized scrambling sequence. The method of the disclosure, by combining physical layer signaling and higher layer signaling, may notify the used group ID and the blind detection space to a UE, wherein the blind detection for the UE is enabled and the signaling overhead is reduced.

Abstract: Provided are wireless communication methods, an eNB and a UE. The wireless communication method performed by an eNB includes transmitting downlink control information (DCI) to a user equipment (UE), wherein the DCI is designed based on a coverage enhancement level for the UE.

Abstract: A communication system includes a communication apparatus and a base station. The communication apparatus includes a Discrete Fourier Transform (DFT) transformer which transforms a time-domain signal into a frequency-domain signal with a DFT size that is a product of powers of a plurality of values; a mapper which maps the frequency-domain signal on a plurality of frequency bands, each frequency band being located at a position separate from position(s) of other(s) of the plurality of frequency bands; and a signal generator which generates a single carrier-frequency division multiple access (SC-FDMA) time-domain signal from the mapped signal. The base station includes a receiver which receives the SC-FDMA time-domain signal; a combiner which generates the frequency-domain signal from the SC-FDMA time-domain signal; and a transformer which transforms the frequency-domain signal into the time-domain signal with an inverse Discrete Fourier Transform (IDFT) having the DFT size.

Abstract: The present disclosure relates to adaptive modulation and coding scheme selection and signaling in a communication system. In particular, a modulation and coding scheme to be used for transmission of a data is selected from a set of predetermined modulation and coding schemes. The predetermination of the set is performed by selecting the set from a plurality of predefined sets. The sets have the same size, so that a modulation and coding selection indicator signaled to select the modulation and coding scheme may be advantageously applied to any of the selected sets. Moreover, a second set includes schemes with a modulation not covered by the schemes of a first set, and which is of a higher order than any modulation in the first set.

Abstract: The present disclosure provides a power control method in device to device (D2D) communication and a user equipment for performing the power control method. The method includes computing a power value of device to device (D2D) transmission of a user equipment performing D2D communication in a subframe in a serving cell, based on a power control adjustment state of a Long Term Evolution (LTE) wide area network (WAN) uplink channel of the user equipment and an offset or a ratio indicated by a transmit power control (TPC) command indicated in D2D grant or downlink control information (DCI) format 3/3A.

Abstract: The present disclosure provides a terminal device that allows constraints on user allocation to be prevented and spread codes to be allocated in a scheduler when non-adaptive HARQ is employed using a PHICH. A codeword generator generates code words by encoding data, a layer mapping unit places each CW in one or a plurality of layers, a DMRS generator generates a reference signal for each layer in which a CW is placed by using any resource among a plurality of resources defined by a mutually orthogonal plurality of OCCs, and an ACK/NACK demodulator receives a response signal indicating a retransmission request. When a response signal requesting retransmission of only a CW placed in a plurality of layers is received, the DMRS generator uses each resource having the same OCC among the plurality of resources for the reference signals generated in the corresponding layers.

Abstract: Provided is a radio communication device which can separate propagation paths of antenna ports and improve a channel estimation accuracy even when using virtual antennas. The device includes: a mapping unit which maps a data signal after modulation to a virtual antenna and a virtual antenna; a phase inversion unit which inverts the phase of S0 transmitted from an antenna port in synchronization with a phase inversion unit between the odd-number slot and the even-number slot; the phase inversion unit which inverts the phase of R0 transmitted from the antenna port; a phase inversion unit which inverts the phase of S1 transmitted from an antenna port in synchronization with a phase inversion unit; and the phase inversion unit which inverts the phase of R1 transmitted from an antenna port.