Sharp Kabushiki Kaisha Corporation

Huawei Technologies Co., Limited

Denso Corporation

Yosuke Akimoto

Shoichi Suzuki

Tatsushi Aiba

Wataru Ouchi

Daiichiro Nakashima

Shohei Yamada

Toshizo Nogami

Kimihiko Imamura

Yasuyuki Kato

Katsunari Uemura

Kazuyuki Shimezawa

Seiji Sato

Hiroshi Katsuragawa

Kazunari Yokomakura

Hiroki Takahashi

Yasuhiro Hamaguchi

Osamu Nakamura

Jungo Goto

Ouchi Wataru

Suzuki Shoichi

In a radio communication system using an Orthogonal Cover Code (OCC) for a DeModulation Reference Signal (DMRS), abase station apparatus correctly receives a Physical Uplink Shared CHannel (PUSCH). If a first mode is set in which a DMRS of a PUSCH is multiplied by an OCC determined in advance or if a temporary Cell Radio Network Temporary Identifier (C-RNTI) was used for a transmission of Downlink Control Information (DCI), the DMRS of the PUSCH is multiplied by the OCC determined in advance, and if a second mode is set in which the DMRS of the PUSCH is multiplied by an OCC determined based on cyclic shift information in the DCI and if an Radio Network Temporary Identifier (RNTI) other than the temporary C-RNTI was used for a transmission of the DCI, the DMRS of the PUSCH is multiplied by the OCC determined based on the cyclic shift information in the DCI.

Terminal device, base station device and radio communication method

In a radio communication system using OCC for DMRS, a base station apparatus correctly receives PUSCH. If a first mode is set in which a demodulation reference signal of a physical uplink shared channel is multiplied by an orthogonal code determined in advance or if a temporary C-RNTI was used for a transmission of downlink control information, the demodulation reference signal of the physical uplink shared channel is multiplied by the orthogonal code determined in advance, and if a second mode is set in which the demodulation reference signal of the physical uplink shared channel is multiplied by an orthogonal code determined on the basis of cyclic shift information in the downlink control information and moreover, if an RNTI other than the temporary C-RNTI was used for the transmission of the downlink control information, the demodulation reference signal of the physical uplink shared channel is multiplied by the orthogonal code determined on the basis of the cyclic shift information in the downlink control information.

There are provided a base station, a terminal, and a communication system in a wireless communication system in which a base station and a terminal communicate with each other, in which the base station and the terminal can efficiently perform communication. The communication system includes a higher layer processing unitconfigured to configure, at the base station, for each terminal, a first reference signal configuration for configuring a measurement target for channel state reporting, configured to configure, at the base station, for each terminal, a second reference signal configuration specifying a resource element to be excluded from the target of data demodulation in a case where the terminal demodulates data, and configured to configure, at the base station, for each terminal, a third reference signal configuration for configuring a measurement target for which a reference signal received power is to be measured by the terminal.

Communication system, terminal, and base station

To optimize transmission periods corresponding to kinds of feedback information, and minimize a reduction in system throughput caused by disagreement of the transmission period with the optimal period, by setting transmission frequencies individually with flexibility corresponding to the kinds of feedback information for a mobile station apparatus to transmit to a base station apparatus, in a wireless communication system in which a mobile station apparatus B measures reception quality of a signal received from a base station apparatus A, and transmits feedback information generated based on the reception quality to the base station apparatus A, the base station apparatus A allocates resources of transmission timing corresponding to the kinds of feedback information, and the mobile station apparatus B transmits a plurality of kinds of feedback information to the base station apparatus using the allocated resources.

Wireless communication system, base station apparatus and mobile station apparatus

A mobile station device executes processing on uplink control information by effectively using uplink resources when transmitting the uplink control information. The mobile station device generates a plurality of ACK/NACK sequences by interleaving and dividing ACKs/NACKs for a plurality of cells in a plurality of subframes, and separately encodes the plurality of ACK/NACK sequences. Also, the mobile station device interleaves a plurality of ACKs/NACKs and a scheduling request together.

Uplink control processing using uplink resources when transmitting uplink control information

A terminal apparatus for communication with a base station apparatus includes reception circuitry and a transmission circuitry. The reception circuitry receives a higher layer signal and sets first and second parameter sets for an uplink power control. The transmission circuitry transmits an uplink signal. If a cell of a first base station and a cell of a second base station are configured, the transmission circuitry sets a transmit power for the uplink signal based on the first parameter set upon detecting a DCI format from the first base station and sets transmit power based on the second parameter set upon detecting a DCI format from the second base station.

Terminal apparatus and communication method for setting appropriate uplink transmit power for an uplink signal based on detecing a DCI

Terminal, and base station for measurement of downlink received power and configuration of appropriate received power

A mobile station apparatus includes a transmission circuit or circuitry. The mobile station apparatus is configured to transmit a sounding reference signal (SRS) in a single carrier-Frequency Division Multiple Access (SC-FDMA) symbol corresponding to an SRS symbol. In addition, the mobile station apparatus is configured to, in a case that a region for SRS transmission on a given component carrier is extended based on a higher layer signal, transmit a first SRS in the SC-FDMA symbol, and transmit a second SRS in the extended region, where the first SRS is an SRS transmitted based on a first higher layer signal and the second SRS is an SRS transmitted based on a second higher layer signal and an SRS request in a physical downlink control channel (PDCCH).

Wireless communication system, base station apparatus, mobile station apparatus, wireless communication method and integrated circuit

A mobile station transmits to a base station a plurality of pre-coding indicators using respective feedback schemes of a plurality of kinds of feedback schemes that can be set simultaneously by the base station. The mobile station receives from the base station a downlink signal on which pre-coders corresponding to one of the transmitted pre-coding indicators have been applied, and a pre-coder confirmation representing whether the corresponding pre-coders have been applied. The pre-coders represented by the pre-coder confirmation are associated with one of the plural feedback schemes.

Base station apparatus, mobile station apparatus and communication method

ACK/NACK processing for a mobile station device, base station device, wireless communication system, wireless communication method, and integrated circuit

The terminal apparatus that communicates with a base station apparatus includes a receiving unit and a transmitting unit. The receiving unit receives a higher layer signal including a first parameter concerning uplink power control, and receives a higher layer signal including a configuration of first and second subframe sets and including a second parameter concerning uplink power control. The transmitting unit sets a transmit power for a sounding reference signal transmitted on a subframe, the transmit power being based on the first parameter, in a case where the first and second subframe sets are configured and the subframe belongs to the first subframe set. The transmitting unit sets a transmit power for a sounding reference signal transmitted on a subframe, the transmit power being based on the second parameter, in a case where the first and second subframe sets are configured and the subframe belongs to the second subframe set.

Terminal apparatus, base station apparatus, and communication method of determining appropriate uplink transmit power of sounding reference signal corresponding to a subframe set

A terminal apparatus includes a receiving circuit and a transmitting circuit. The receiving circuit receives a higher layer signal including a first parameter concerning uplink power control, and receives a higher layer signal including a configuration of first and second subframe sets and a second parameter concerning uplink power control. The transmitting circuit sets a transmit power for a physical uplink shared channel transmitted on a subframe, the transmit power being based on the first parameter, in a case where the first and second subframe sets are configured and the subframe belongs to the first subframe set, and sets a transmit power for a physical uplink shared channel transmitted on a subframe, the transmit power being based on the second parameter, in a case where the first and second subframe sets are configured and the subframe belongs to the second subframe set.

Terminal apparatus, base station apparatus, and communication method of determining appropriate uplink transmit power of physical uplink shared channel corresponding to a subframe set

A terminal is disclosed that includes a higher layer processing circuitry, a channel measurement circuitry, and a transmitting circuitry. The terminal is configured to set a first parameter and a second parameter measurement. The channel measurement circuitry is configured to perform a measurement of a reference signal received power based on a first reference signal in a case that the first parameter is configured in a measurement configuration, and perform a measurement of a reference signal received power based on a second reference signal in a case that at least the second parameter is configured in the measurement configuration. The transmitting circuitry is configured to report a first measurement report.

Terminal, base station, and method for terminal to report received power of reference signals to base station

A base station apparatus communicates with a mobile station apparatus transmitting a data signal and a reference signal for channel estimation. The base station includes: a simultaneous transmission setting part which sets simultaneous transmission control information indicating whether or not to enable simultaneous transmission of the data signal and the reference signal, a transmission section which transmits the set simultaneous transmission control information to the mobile station apparatus; and a radio resource control section which determines whether or not to enable simultaneous transmission of the data signal and the reference signal on the basis of a power headroom which is notified from the mobile station apparatus, the headroom being a difference between the maximum transmit power value of the mobile station apparatus and a prescribed power value estimated for uplink transmission.

Wireless communication system, base station apparatus, mobile station apparatus, control method of wireless communication system, control program of base station apparatus, and control program of mobile station apparatus

Growing community of inventors

Osaka, Japan

Yosuke Akimoto