Sun Patent Trust

Panasonic Corporation

Panasonic Intellectual Property Corporation of America

Matsushita Electric Industrial Co., Ltd.

Panasonic Holdings Corporation

Yasuaki Yuda

Seigo Nakao

Masayuki Hoshino

Daichi Imamura

Ayako Horiuchi

Akihiko Nishio

Kenichi Miyoshi

Katsuhiko Hiramatsu

Atsushi Sumasu

Takashi Fukagawa

Takaaki Kishigami

Tomohiro Imai

Ryohei Kimura

Shoji Miyamoto

Takashi Iwai

Yoshihiko Ogawa

Sujuan Feng

Michael Einhaus

Sadaki Futagi

Keiji Takakusaki

Alexander Golitschek Edler Von Elbwart

Takaaki Kisigami

Lilei Wang

Keiji Takausaki

Yutaka Murakami

Yoichi Nakagawa

Shinichiro Takabayashi

Shinsuke Takaoka

Yoshiko Saito

Fumiyuki Adachi

Tetsuya Yamamoto

Kenichi Higuchi

Toru Oizumi

Masahiro Mimura

Kenichi Kuri

Hiroaki Morino

Youichi Nakagawa

Selgo Nakao

Daichl Imamura

Shotaro Maki

A communication apparatus includes control circuitry which, in operation, controls transmission of a reference signal for phase noise compensation in each of a plurality of streams of multiple-input multiple-output (MIMO) transmission in accordance with a condition, and transmission circuitry which, in operation, transmits the reference signal according to the control.

Communication apparatus and communication method

Provided are a base station, whereby the erroneous detection of control information can be reduced, thereby preventing the degradation of the system throughput. A base station maps a downstream allocation control information unit, which is addressed to a terminal, to a first resource region, which can be used for any of a downstream control channel region and a downstream data channel region, or to a second resource region, which can be used only for the downstream control channel, so as to transmit the downstream allocation control information unit. In the base station, a control unit establishes a scale of the PDCCH region, and a transmission region establishing unit establishes, on the basis of a scale value established by the control unit, a mapping region to which the DCI is mapped within the R-PDCCH region and the PDCCH region.

Communication apparatus and communication reception method

Disclosed are a wireless communication base station device and a division number determination method that improves the frequency diversity effect while maintaining channel estimation accuracy regardless of the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. A determination unit determines the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. Here, the determination unit increases the number of divisions in the frequency domain of the transmission signal from the wireless communication terminal device as the number of pilot blocks included in the transmission signal increases. In addition, a scheduling unit schedules allocation to the frequency resources of the divided transmission signal according to the number of divisions determined by the determination unit.

Integrated circuit

A base station is disclosed that enables an efficient use of resources even when a TTI length is shortened. In this base station, a PDCCH section () generates one piece of downlink control information (DCI) containing control information for a plurality of first transmission time intervals (TTIs) each having a TTI length shorter than a second TTI, and a transmission section () transmits the DCI. Control information on retransmission processing for a data signal is configured for each of the plurality of first TTIs while control information other than the control information on the retransmission processing is configured in common among the plurality of first TTIs in the DCI.

Base station, terminal, and communication method

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.

Communication apparatus and communication method for measuring a channel quality indicator (CQI)

To suppress concentration of channel quality information requests and reports in a case of discontinuously transmitting reference signals at specific resources in a time domain, and thereby preventing degradation in throughput. A transmission apparatus transmits an instruction of CSI request distributed for each reception apparatus in a subframe concurrently with or earlier than a reference signal CSI-RS to each of reception apparatuses. Each of the reception apparatuses detects the CSI request from the transmission apparatus and calculates CSI from a channel estimation value of CSI-RS received thereafter. Then, the reception apparatus identifies CSI report subframe of the own apparatus from CSI report interval information of a given time interval notified in advance, the subframe in which the CSI request is detected and transmission timing of CSI-RS, and transmits a feedback signal including CSI report value by using PUSCH at the timing of the CSI report subframe.

Wireless communication apparatus and wireless communication method

A reception apparatus according to the present disclosure includes a receiver which, in operation, receives a downlink signal including a first data signal for the reception apparatus and first Reference Signals for Phase Tracking (PT-RS). The first data signal is mapped on a first set of subcarriers and the first PT-RS is mapped to the downlink signal based on a first Modulation and Coding Scheme (MCS) configured for the first data signal. The reception apparatus according also includes a circuit which, in operation, estimates a phase noise using the first PT-RS included in the downlink signal.

Transmission apparatus, reception apparatus, transmission method, and reception method

Provided is a radio communication terminal which is capable of measuring quality in communication with a handover destination with high accuracy. The radio communication terminal is capable of communicating with a base station or a relay node, and includes: a receiver which receives control information including information relating to measurement of measuring quality of a neighbor cell; an extractor which extracts information on a subframe where the measurement should be performed, which is a subframe where only transmission of a signal from the relay node connected to the base station is performed, from the information relating to the measurement; a measurement section which performs the measurement, on a subframe basis, based on the extracted information on the subframe where the measurement should be performed; and a transmitter which transmits a result of the measurement to the base station or the relay node.

Radio communication terminal and radio communication method

The transmission of a reference signal, such as a CSI-RS, is enabled while maintaining a power saving effect when performing inter-cell cooperative transmission/reception or the like in a plurality of cells. In order to realize inter-cell cooperative transmission/reception, a CSI-RS which is used for estimating the state of a spatial propagation path of a communication line is generated by a CSI-RS generation unit, and the CSI-RS is disposed in a predetermined subframe by a disposition unit and transmitted. At this time, when a frame has ten subframes #0 to #9, the CSI-RS is disposed in the subframes #4 and #9, which are subframes excluding the subframes #0 and #5 incapable of transmitting a CSI-RS and are subframes other than subframes capable of acting as MBSFN subframes when discontinuous communication (Extended Cell DTX) is performed so as to achieve power saving, and transmitted.

Wireless communication device and wireless communication method

Growing community of inventors

Kanagawa, Japan

Yasuaki Yuda