Abstract: Provided is a semiconductor device including: a drift region of a first conductivity type provided in a semiconductor substrate; a collector region of a second conductivity type provided on a back surface of the semiconductor substrate; a cathode region of the first conductivity type provided on the back surface of the semiconductor substrate and having a higher doping concentration than the drift region; a plurality of trench portions provided on a front surface of the semiconductor substrate; and a lifetime control portion provided in the semiconductor substrate and containing a lifetime killer, in which the lifetime control portion includes: a main region provided in a diode portion; and a decay region provided to extend from the main region in a direction parallel to the front surface of the semiconductor substrate and having a lifetime killer concentration that has decayed more than a lifetime killer concentration of the main region.

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: 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 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: 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: 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: An access point apparatus is an access point apparatus configured to maintain a first connection and a second connection, and includes a receiver configured to receive, in the first connection, a first frame including information associated with the second connection and a transmitter configured to determine, using the first frame, whether to transmit a second frame in the second connection.

Abstract: An access point apparatus is an access point apparatus that maintains multiple connections, and includes a receiver that performs carrier sensing in the multiple connections and a transmitter that transmits a first frame for reserving a radio medium in a predetermined time interval in the multiple connections based on the carrier sensing, and the first frame includes information indicating a station apparatus having preference for use with respect to each of the multiple connections.

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 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 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 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: Provided are communication apparatus and a communication method that allow for secure communication even in a case that an eavesdropper has multiple antennas. An apparatus includes a transmitter configured to transmit a constant amplitude signal from three or more transmit antennas; a controller configured to control a phase of the constant amplitude signal, based on channel information and a target symbol; and a modulation unit configured to generate a modulation symbol from bits. The target symbol is generated by multiplying the modulation symbol by an amplitude coefficient.

Abstract: A base station apparatus provided with a function of performing communication using multiple beams implements appropriate beamforming while reducing interference power, thereby communication quality becomes stable and frequency efficiency or throughput is improved. The base station apparatus according to the present invention is a base station apparatus for communicating with a terminal apparatus, the base station apparatus including: a transmitter configured to transmit a synchronization signal block including a synchronization signal in a prescribed transmission window; and a controller configured to configure a size of the prescribed transmission window in which the synchronization signal block is transmitted, in which the transmitter notifies the terminal apparatus of information associated with QCL between two of the synchronization signal blocks transmitted in the prescribed transmission window.

Abstract: There is provided a tightening tool control system including a tightening tool and a PC (Personal Computer) for controlling the tightening tool, the tightening tool having a registration mode for detecting a tightening posture when tightening a member and for registering the detected tightening posture in the PC.

Abstract: A terminal apparatus and a communication method are provided. The terminal apparatus communicates with a base station apparatus. The terminal apparatus includes a receiver and a measurement unit. The receiver is configured to receive downlink signals and configuration information in a first component carrier and a second component carrier. The measurement unit is configured to calculate Channel State Information (CSI) of the first component carrier and the second component carrier. In a case that spatial Quasi-coloration (QCL) for reception parameters is configured between the first component carrier and the second component carrier in the configuration information, the CSI of the first component carrier and the CSI of the second component carrier are calculated with a same reception parameter.

Abstract: A base station apparatus according to the present invention includes a transmitter configured to transmit a downlink signal by using a first component carrier and a second component carrier, and a receiver configured to receive an uplink signal transmitted by the terminal apparatus by using at least the second component carrier. The transmitter transmits spatial relation information in the uplink signal, the spatial relation information is information indicating a spatial domain transmission filter for transmitting the uplink signal, and the spatial relation information in the second component carrier includes information indicating the first component carrier.