Abstract: A Multi-Link access point apparatus uses multiple combinations of link offset information and information of the number of links to notify, by using only a small amount of information, whether a frame is buffered that is addressed to a Multi-Link station apparatus operating in a Power Management mode and information of a link, the use of which is indicated or recommended.

Abstract: An electric motor system includes a battery, an inverter, an electric motor, a zero-phase switching arm and a control unit. The inverter converts DC power output from the battery into three-phase AC power and outputs the three-phase AC power to the electric motor. A rotor of the electric motor rotates by the three-phase AC power output from the inverter. A neural point of the electric motor is connected to the zero-phase switching arm. A zero-phase current flowing through respective windings of the electric motor is adjusted by switching of the zero-phase switching arm. By this means, in the electric motor system, torque is generated at the rotor also using the zero-phase current as well as a three-phase AC current flowing through the respective windings.

Abstract: To provide a terminal apparatus and a communication method capable of improving reliability and frequency efficiency in a case of transmission by beamforming. Provided are a higher layer processing unit configured with demodulation reference signal (DMRS) antenna port groups for indicating two groups of antenna ports of a DMRS, a receiver configured to receive the DMRS, downlink control information (DCI), and a downlink shared channel (PDSCH), and a decoding unit configured to decode the PDSCH, wherein the PDSCH includes a transport block, and in a case that the number of the transport blocks configured in the DCI is one, the PDSCH demodulated using a DMRS of a first group and/or the PDSCH demodulated using a DMRS of a second group is used to decode one transport block.

Abstract: In a wireless communication system including a first sub-wireless communication system for managing a first radio resource and a second sub-wireless communication system for managing a second radio resource, a terminal apparatus connected to the first sub-wireless communication system is capable of performing communication using the second radio resource in addition to the first radio resource.

Abstract: A base station apparatus transmits, to a terminal apparatus, SR link information including information indicating multiple terminal apparatuses supporting intra-BSS SR, a color index associated with the information indicating the terminal apparatuses, and information of a power detection level corresponding to a combination of the terminal apparatuses. The terminal apparatus receives the SR link information. The terminal apparatus receives a radio frame, and compares the power detection level determined based on the color index included in a PHY header of the radio frame being received, the multiple terminal apparatuses indicated by the color index, the information of the power detection level corresponding to the multiple terminal apparatuses indicated by the color index, and transmit power and received power of the radio frame being received.

Abstract: A base station apparatus for communicating with a terminal apparatus receives direct link setup information, and in a case that Intra-BSS Spatial Reuse (SR) is enabled, the base station apparatus generates SR link information including a terminal apparatus to perform direct link and a color index associated with the terminal to perform direct link, and notifies the terminal apparatus of the SR link information. The terminal apparatus receives the SR link information, and acquires the terminal apparatus to perform direct link supporting intra-BSS SR and the color index corresponding to the terminal apparatus to perform direct link supporting intra-BSS SR. intra-BSS SR is performed for data used by an application for which traffic with high priority and/or with low latency is specified, and communication efficiency can be improved in coordination with the application.

Abstract: A base station apparatus for communicating with a terminal apparatus receives direct link setup information, and in a case that Intra-BSS Spatial Reuse (SR) is enabled, the base station apparatus generates SR link information including a terminal apparatus to perform direct link, a color index associated with the terminal to perform direct link, and a power detection level applied to a combination to perform direct link, and notifies the terminal apparatus. In a case that a radio wave propagation state of the terminal apparatus changes, information for identifying the terminal apparatus and information related to the power detection level are transmitted to the base station apparatus. Intra-BSS SR is performed for data used by an application in which traffic with high priority and/or with low latency is specified to allow communication efficiency to be improved in coordination with the application.

Abstract: Provided is a station apparatus for wirelessly communicating with an access point apparatus through multi-link, the access point apparatus including multiple sub access point units, the station apparatus including multiple sub station units, wherein a sub station unit of the multiple sub station units includes a frame receiver configured to receive a radio frame, a measurement circuitry configured to measure reception quality of the received radio frame, and a frame transmitter configured to transmit the radio frame, and the sub station unit is configured to report information related to the reception quality to the access point apparatus.

Abstract: A radio communication apparatus that simultaneously uses multiple radio channels, the radio communication apparatus includes a radio communicator, and a radio controller, wherein the radio controller uses multiple transmission methods, at least one of the multiple transmission methods is a method for reducing latency, at least one radio channel of the multiple radio channels is allocated to the method for reducing latency, a beacon is transmitted on the multiple radio channels by use of the radio communicator, and information transmitted in the beacon includes an information element indicating the at least one radio channel allocated to the method for reducing latency.

Abstract: According to an aspect of the present invention, in a wireless LAN communication system, a primary channel to be used for uplink frame transmission is configured to be different from a primary channel to be used for downlink frame transmission, so that the frequency efficiency can be improved. In a wireless LAN communication system capable of frame transmission and/or reception using a broadband frequency such as a 320 MHz bandwidth, terminal apparatuses connected to an access point apparatus include terminals that perform power saving operations, legacy terminals, and low-spec terminals, and it is conceivable that a ratio of terminal apparatuses that perform frame transmission and/or reception using the entire bandwidth is not so high particularly in a transition stage.

Abstract: A station apparatus according to the present invention is a station apparatus configured to interpret a physical layer signal, the station apparatus including a signal demodulator configured to decode a physical layer signal and perform error detection, based on either first decoding that performs packet combining in the physical layer or second decoding that does not perform packet combining in the physical layer, a higher layer processor configured to transfer a result of the error detection to a MAC layer, and a transmitter configured to hold at least part of the physical layer signal and transmit a trigger frame that causes another station apparatus to transmit a frame, wherein the trigger frame includes information indicating either the first decoding or the second decoding.

Abstract: A radio communication apparatus includes a receiver configured to receive control information related to multiple connections (a multi-link), and a frame transmitter configured to transmit a frame associated with the multi-link, wherein one or more of the multi-links are configurable, the multi-link includes two or more connections, and the control information includes an identifier for identifying the multi-link.

Abstract: A radio communication apparatus that communicates with a base station apparatus and another radio communication apparatus includes a receive circuitry that receives a radio frame, a transmit circuitry that transmits a radio frame, and a control circuitry that controls transmission and/or reception of a radio frame. The receive circuitry receives a radio frame, a PHY header of the received radio frame is demodulated, and in a case that first information, included in the PHY header currently being received, to identify a radio system indicates a radio system where the radio communication apparatus belongs and that a predetermined condition is satisfied, a radio frame is transmitted to fit within NAV of the PHY header currently being received.

Abstract: A base station apparatus that communicates with a terminal apparatus includes a transmitter that transmits a radio frame, a receiver that receives a radio frame, a controller that controls transmission and reception of a radio frame, and an evaluator that checks the received radio frame, and the controller transmits, to the terminal apparatus, information to stop a priority right configured for the terminal apparatus.

Abstract: A terminal apparatus that communicates with a base station apparatus or another terminal apparatus includes a transmitter that transmits a radio frame, a receiver that receives a carrier sense and a radio frame, and a controller that controls transmission and reception of a radio frame, and the controller transmits, to the base station apparatus, a radio frame including priority right utilization condition information and information to request a priority right.

Abstract: A communication apparatus that maintains a first connection and a second connection, the communication apparatus including a frame generator configured to generate a first frame and a second frame, and a transmitter configured to transmit the first frame based on the first connection and transmit the second frame based on the second connection, wherein a frame length of the first frame and a frame length of the second frame are configured based on destination information of the first frame and destination information of the second frame, respectively.

Abstract: A station apparatus according to the present invention includes a signal demodulator configured to interpret a first coding scheme and a second coding scheme, a receiver configured to receive a reception frame including a control signal, and a transmitter configured to transmit, based on the control signal, a transmission frame including any one of a first retransmission request signal associated with the first coding scheme or a second retransmission request signal associated with the second coding scheme, wherein the control signal includes first information indicating whether a reception method for changing a carrier sense level is allowed.

Abstract: A station apparatus according to the present invention includes a signal demodulator configured to decode a signal of a physical layer and perform error detection, a higher layer processor configured to transfer a result of decoding the physical layer to a MAC layer and obtain data transferred from the MAC layer, and a transmitter configured to generate a signal of a physical layer, based on the data transferred from the MAC layer, wherein the signal of the physical layer includes a physical header, and the physical header includes information associated with a result of the error detection.

Abstract: A station apparatus according to the present invention includes a physical layer frame generator configured to selectively use a first coding scheme and a second coding scheme, a transmitter configured to transmit a frame including a control signal, and a higher layer processor configured to configure either the first coding scheme or the second coding scheme for information bits included in the frame, based on the control information, wherein the control signal includes first information indicating whether a reception method for changing a carrier sense level is allowed for a communication apparatus that receives the frame.

Abstract: In a communication scheme using a radio frame used in a mobile communication system, a reduction in transmission efficiency that occurs in a case of performing Listen Before Talk (LBT) that performs carrier sense for transmission is relieved. An OFDM signal generated in a terminal apparatus includes any of a first OFDM signal including a signal resulting from inverse discrete Fourier transform and a cyclic prefix (CP) using a portion of the signal resulting from the inverse discrete Fourier transform, and a second OFDM signal obtained by replacing a partial segment of the first OFDM signal with a prescribed number of continuous zeros, a transmission signal is managed with a resource grid of which a unit includes one or more subcarriers and an OFDM symbol length including the CP, and in a case that a period between the transmission occasion based on the carrier sense and the boundary of the resource grid is less than or equal to a prescribed time, the second OFDM signal is transmitted.