Canon Kabushiki Kaisha

Chiyoda Corporation

Azuma Shokai Co., Ltd.

Tetsuo Kanda

Toshihiko Myojo

Norihiro Mochizuki

Katsuo Saito

Ichiro Kato

Kazuo Moritomo

Atsushi Takasaki

Tadashi Eguchi

Hidetada Nago

Akira Torisawa

Rie Suzuki

Eiji Kawata

Wataru Tachiwa

Norihito Aoki

Kenichi Okuda

Kazuma Kawano

Noboru Ikeda

Manami Miyazaki

Kazuhiro Yamakawa

Yasuyuki Arai

Yuichiro Hara

A wireless apparatus includes a determination unit configured to determine whether the received control information is leading control information for controlling the imaging process or succeeding control information succeeding the leading control information, a decision unit configured to decide a succeeding control timing at which the succeeding control information is output, with reference to a leading control timing at which the leading control information is output, and an output unit configured to output the leading control information to the imaging unit in accordance with the leading control timing and output the succeeding control information to the imaging unit in accordance with the succeeding control timing.

Wireless imaging system, method of controlling wireless imaging system, wireless communication apparatus, and storage medium

A wireless communication apparatus that conducts full-duplex wireless communication with a communication partner using a transmitting antenna and a receiving antenna is provided. The apparatus includes a transmitting unit configured to transmit a signal via the transmitting antenna using a first frequency channel, a receiving unit configured to receive a signal via the receiving antenna using a second frequency channel different from the first frequency channel, and a control unit configured to control beam angle of directionality of at least one of the transmitting antenna and the receiving antenna, so that a direction of a communication path of a signal which the transmitting unit transmits and the communication partner receives, and a direction of a communication path of a signal which the communication partner transmits and the receiving unit receives, differ from each other.

Apparatus and methods for conducting full-duplex wireless communication with a communication partner

In a communication system that includes a control station and dependent stations, the control station broadcasts data intended for the dependent stations on a per-superframe basis. The dependent stations relay the data received from the control station among themselves. If a dependent station has received the data transmitted from the control station, the dependent station transmits an acknowledgement response. If a dependent station does not receive an acknowledgement response from another dependent station, then the dependent station relays the data intended for the other dependent station.

Communication system, dependent station thereof and dependent-station relay transmission method

A communication apparatus may include a demodulation unit, a waveform memory unit, a decoding unit, an encoding unit, a modulation unit, and a transmission unit. The demodulation unit demodulates a received signal to create a demodulated signal. The waveform memory unit stores the demodulated signal and a waveform of the demodulated signal. The decoding unit decodes the demodulated signal to create a decoded signal. The encoding unit encodes the decoded signal to create an encoded signal. The modulation unit modulates one of the encoded signal to create a modulated encoded signal and the demodulated signal to create a modulated demodulated signal. The transmission unit transmit one of the modulated encoded signal and the modulated demodulated signal according to a reception state of the received signal.

Communication apparatus, relay method thereof, and computer-readable storage medium

A multiple control station transits a first broadcast frame including a first identifier for identifying a first host and a second broadcast frame including a second identifier for identifying a second host to a terminal station over a wireless channel using time division. The multiple control station then receives a connection request frame that requests connection with the first host or the second host from the terminal station. Arbitration is then performed so that the terminal station is connected to the first host or the second host in accordance with the first identifier or the second identifier included in the received connection request frame.

Communication system, communication apparatus, and control method thereof

A device and method for controlling communication among a plurality of communication devices, the device and method including causing each of one or more candidate devices to which control rights of a network are transferable, from among the plurality of communication devices, to transmit a pseudo information signal, counting, for each of the one or more candidate devices, the number of communication devices from the plurality of communication devices having responded to the pseudo information signal, and determining a candidate device to which to transfer control rights of the network based on the number of communication devices from the plurality of communication devices having responded to the pseudo information signal.

Communication control device, method of determining communication control device, and storage medium for performing the method

A communication apparatus includes a plurality of descramblers for subjecting a second header portion of a received frame to descrambling processing using pseudo-random sequences that differ from one another; a plurality of syndrome arithmetic units for performing a syndrome calculation, which is in accordance with a cyclic redundancy check code, with respect to headers descrambled by respective ones of the plurality of descramblers, and an error correction unit for selecting a header that has been descrambled by one descrambler among the plurality of descramblers as a receive header, in accordance with syndrome values calculated by respective ones of the plurality of syndrome arithmetic units.

Communication apparatus and method including a plurality of descramblers

A communication control technique that makes it possible to avoid interference with another wireless communication system. To realize this technique, a tributary station according to the present invention transmits a beacon in an asynchronous BP after being started up, thereby determining whether or not another wireless communication network has received that beacon, and in the case where it has been determined that the other wireless communication network has received the beacon, the tributary station decreases its transmission power until the beacon is no longer received by the other wireless communication network.

Communication apparatus and communication control method with power adjustment to avoid interference between apparatuses on first and second networks

There is provided a communication control technique in which it is possible to avoid interference with another wireless communication system. This invention is characterized by a control station which controls wireless communication of dependent stations. When a dependent station newly starts, the control station determines whether a beacon transmitted by the dependent station is received by another wireless communication network. When determining that the beacon is received by the other wireless communication network, the control station instructs the dependent station to lower the transmission power until the beacon is not received.

Communication system, communication apparatus, and communication method to minimize interference by transmission power control

A magnetostrictive torque sensor that detects a torque of a rotating shaft and/or a stationary shaft by using a magnetostriction inverse effect that occurs on a shaft surface, the magnetostrictive torque sensor includes a first detection coil, a second detection coil, a first oscillation circuit, a second oscillation circuit, a first direction magnetic permeability detector, a second direction magnetic permeability detector, and a torque detector.

Magnetostrictive torque sensor and torque detection method

A communication system makes throughput preferable by reducing wireless frame collision which occurs when a plurality of control stations cannot recognize one another. When a wireless communication device that is operating as a dependent station of a first control station detects a second control station, DEVice operates as a dependent control station. Accordingly, the second control station is changed to a dependent station or a dependent control station.

Reduced frame collision wireless communication system having communication device mode switching

In a communication system including plural communication apparatuses that communicate each other using a single communication path, the state of the communication path is detected for communication. If the communication path is busy, a first control method is performed for controlling access to the communication path using a back off time selected at random. A second control method secures the communication path by transmitting and receiving the predetermined signal at transmission of a signal so as to control access to the communication path. In accordance with the kind of the signal to be transmitted, the first or the second control method is selected for communication. Thus, plural communication apparatuses can perform efficient communication.

Method and apparatus for data transmission with control over access to a transmission medium

A receiving apparatus includes a base-band conversion circuit, a synchronizing circuit/code generator and a demodulator. The base-band conversion circuit converts a received signal into a base-band signal. The synchronizing circuit/code generator detects a spread code included in the received signal to generate a plurality of spread codes in synchronization with the spread code included in the received signal. The demodulator uses the plurality of spread codes supplied by the synchronizing circuit/code generator to demodulate the base-band signal.

Spread spectrum receiving apparatus

A spread spectrum communication method in which, on the transmission side, each item of parallel data is spread with a different code, and is encoded into a combination of I-channel and Q-channel signals. On the reception side, the combination of I-channel and Q-channel signals is encoded to correlate it with each of a plurality of codes.

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Kawasaki, Japan

Tetsuo Kanda