Abstract: A communication device that includes an antenna including a first electrode and a second electrode, at least one of the first electrode or the second electrode including a plurality of segmented electrodes. The communication device further includes a communication circuit, coupled to the antenna, that performs a transmission operation and a reception operation of transmission data between a device and the communication circuit based on a communication protocol that includes a plurality of communication stages. The communication device further includes a switch that switches whether or not each of the plurality of segmented electrodes is to be coupled to the communication circuit and a controller that changes an effective electrode area of at least one of the first electrode or the second electrode by the switch, based on at least one of the operations of the communication circuit, a type of the transmission data, or the communication stages.

Abstract: A communication system includes one or more communication apparatuses, each including a transmission circuit and a reception circuit. The transmission circuit includes a transmission unit and a signal generator. The transmission unit transmits one of a first transmission signal including first transmission data or a second transmission signal including at least one of a periodic signal with a constant frequency or a narrow band modulation signal having lower speed than the first transmission data. The signal generator generates the second transmission signal. The reception circuit includes a reception unit that receives the first transmission signal and the second transmission signal a narrow band detector that outputs a narrow band detection signal through detecting the second transmission signal in a narrow band, and a determination unit that determines presence of a significant signal or presence of significant signal change in the narrow band detection signal and outputs a determination signal.

Abstract: [Overview] [Problem to be Solved] To provide a wireless communication device that is able to easily switch to an existing system when a new system is constructed by employing a communication scheme using a millimeter wave. [Solution] There is provided a wireless communication device including a first communication controller that executes communication control through a first line using a radio wave of a millimeter waveband, a second communication controller that executes communication control through a second line using a radio wave of a band other than the millimeter waveband, and a connection controller that provides, via the first line, information regarding charging by using a command of a physical layer.

Abstract: A communication device of the present disclosure includes: an antenna including a first electrode and a second electrode, in which at least one of the first electrode or the second electrode includes a plurality of segmented electrodes; a communication circuit that is coupled to the antenna, and performs, through the antenna, a transmission operation and a reception operation of transmission data between a device to be communicated and the communication circuit, in accordance with a communication protocol that includes a plurality of communication stages; a switch that switches whether or not each of the plurality of segmented electrodes is to be coupled to the communication circuit, to change effective electrode area of at least one of the first electrode or the second electrode; and a controller that changes the effective electrode area of at least one of the first electrode or the second electrode by the switch, on the basis of at least one of the operations of the communication circuit, a type of the tran

Abstract: The present technology relates to a positioning device, a communication device, and a positioning system that are designed to consume lower amounts of power in a more reliable manner. In a case where the identification information included in a received radio signal is the identification information about the current search target, and the reception intensity of the radio signal exceeds a predetermined value, the positioning device transmits a distance measurement start instruction to the communication device, and carries out measurement of the distance to the communication device. Upon receiving the distance measurement start instruction from the positioning device, the communication device performs measurement of the distance to the positioning device. The present technology can be applied to a positioning system.

Abstract: A communication system of the present disclosure includes one or more communication apparatuses, each of which includes: a transmission circuit including a transmission unit and a signal generator, the transmission unit that selectively transmits, via an antenna unit, one of a first transmission signal including first transmission data or a second transmission signal including at least one of a periodic signal with a constant frequency or a narrow band modulation signal by data having lower speed than the first transmission data, and the signal generator that generates the second transmission signal; and a reception circuit including a reception unit, a narrow band detector, and a determination unit, the reception unit that receives the first transmission signal and the second transmission signal via the antenna unit, the narrow band detector that outputs a narrow band detection signal through detecting the second transmission signal in a narrow band, and the determination unit that determines presence or abs

Abstract: The present technology relates to a positioning device, a communication device, and a positioning system that are designed to consume lower amounts of power in a more reliable manner. In a case where the identification information included in a received radio signal is the identification information about the current search target, and the reception intensity of the radio signal exceeds a predetermined value, the positioning device transmits a distance measurement start instruction to the communication device, and carries out measurement of the distance to the communication device. Upon receiving the distance measurement start instruction from the positioning device, the communication device performs measurement of the distance to the positioning device. The present technology can be applied to a positioning system.

Abstract: Provided is a communication apparatus including: a switch unit configured to switch data communication to be performed with another communication apparatus on a transmission side or a reception side; and a communication unit configured to transmit transmission data to the other communication apparatus and receive a response when the data communication is performed on the transmission side, and receive reception data from the other communication apparatus and transmit a response when the data communication is performed on the reception side. The switch unit performs switching from the transmission side to the reception side when the response received by the communication unit includes a switching instruction.

Abstract: [Object] To propose a communication apparatus, a communication system and a communication method through which it is possible to support full-duplex communication over half-duplex communication channels. [Solution] Provided is a communication apparatus including: a switch unit configured to switch data communication to be performed with another communication apparatus on a transmission side or a reception side; and a communication unit configured to transmit transmission data to the other communication apparatus and receive a response when the data communication is performed on the transmission side, and receive reception data from the other communication apparatus and transmit a response when the data communication is performed on the reception side. The switch unit performs switching from the transmission side to the reception side when the response received by the communication unit includes a switching instruction.

Abstract: A communication apparatus of the present invention includes a transmission/reception coupler for performing a close-range one-to-one communication with a device of a communication counterpart by electric field coupling or magnetic field coupling; an intermittent operation unit for performing intermittent operation without releasing connection after the connection is established with the device of the communication counterpart; and an intermittent operation notifying unit for notifying the device of the communication counterpart of performing the intermittent operation.

Abstract: A wireless communications system for performing data communications between a data transmission side wireless communications device and a data receiving side wireless communications device. In the system, random back-off access control is performed until a connection is established between the data transmission side wireless communications device and the data receiving side wireless communications device. Then, after the connection is established, asymmetric IFS access control is performed.

Abstract: A communication apparatus of the present invention includes a transmission/reception coupler for performing a close-range one-to-one communication with a device of a communication counterpart by electric field coupling or magnetic field coupling; an intermittent operation unit for performing intermittent operation with a predetermined pause period provided when performing the communication with the device of the communication counterpart; and an intermittent operation cancel request unit for outputting a cancel request of canceling the intermittent operation of the device of the communication counterpart when transmitting a data frame to the device of the communication counterpart and a response with respect to the data frame is not received from the communication counterpart.

Abstract: A code generating device includes a code word generating section which generates a code word with a predetermined code word length by applying a second matrix Gq of a second error detection method with regard to an information word A? which has been input, and a code word conversion section which converts the code word generated by the code word generating section based on an added fixed value (Qa+Pa) which is formed from respective code words Qa and Pa which are obtained by the second matrix Gq and a first matrix Gp of a first error detection method being respectively applied to an information word A which is formed from a specific data string.

Abstract: In a data transfer system in which wireless data transmission is carried out between a first device and a second device that each has a UWB wireless device, the data transfer system includes a ranging unit that is provided in the UWB wireless device of at least one of the first and second devices and measures a distance to the other of the first and second devices; a distance determination unit that determines, based on a measurement result by the ranging unit, whether or not the distance between the first and second devices has been within such a predetermined range that a predetermined transmission rate and a predetermined transmission quality are obtained by UWB communication; and a data transfer unit that executes data transmission between the first and second devices in response to a determination by the distance determination unit that the distance between the first and second devices has been within the predetermined range.

Abstract: A communication apparatus of the present invention includes a transmission/reception coupler for performing a close-range one-to-one communication with a device of a communication counterpart by electric field coupling or magnetic field coupling; an intermittent operation unit for performing intermittent operation without releasing connection after the connection is established with the device of the communication counterpart; and an intermittent operation notifying unit for notifying the device of the communication counterpart of performing the intermittent operation.

Abstract: A communication apparatus of the present invention includes a transmission/reception coupler for performing a close-range one-to-one communication with a device of a communication counterpart by electric field coupling or magnetic field coupling; an intermittent operation unit for performing intermittent operation with a predetermined pause period provided when performing the communication with the device of the communication counterpart; and an intermittent operation cancel request unit for outputting a cancel request of canceling the intermittent operation of the device of the communication counterpart when transmitting a data frame to the device of the communication counterpart and a response with respect to the data frame is not received from the communication counterpart.

Abstract: The present invention is to provide each communication station with a transmission prioritised period without any useless latency in an ad-hoc communication environment including no control station. For this end, each communication station periodically transmits the beacon signal and acquires the transmission prioritised period immediately after transmission of the beacon. If the number of communication stations in the network is small, a communication station transmit a supplementary beacon within the super frame period, thereby effectively shortening the beacon interval and reducing latency at the start of transmission. At the time when a new communication station enters the network, the supplementary beacon is released in order to accommodate such new communication station.

Abstract: A wireless communications system for performing data communications between a data transmission side wireless communications device and a data receiving side wireless communications device. In the system, random back-off access control is performed until a connection is established between the data transmission side wireless communications device and the data receiving side wireless communications device. Then, after the connection is established, asymmetric IFS access control is performed.

Abstract: In a data transfer system in which wireless data transmission is carried out between a first device and a second device that each has a UWB wireless device, the data transfer system includes a ranging unit that is provided in the UWB wireless device of at least one of the first and second devices and measures a distance to the other of the first and second devices; a distance determination unit that determines, based on a measurement result by the ranging unit, whether or not the distance between the first and second devices has been within such a predetermined range that a predetermined transmission rate and a predetermined transmission quality are obtained by UWB communication; and a data transfer unit that executes data transmission between the first and second devices in response to a determination by the distance determination unit that the distance between the first and second devices has been within the predetermined range.

Abstract: Under a multi-cell radio communication environment where connection between cells or TDMA frame synchronization is not established, a mobile station carries out an adjacent cell search under low power consumption. Adjacent cell information acquired through search by the mobile station is managed centered on a base station and may be provided by the base station as adjacent cell information, when the mobile station carries out the adjacent cell search. The adjacent cell information includes, for example, a TDMA frame offset between cells so that the mobile station receives a broadcast channel of the adjacent cell at appropriate timing based on the adjacent cell information and therefore does not need to perform unnecessary reception operation in the event of a handoff.