Canon Kabushiki Kaisha

Tomoyuki Takada

Noriyuki Suzuki

Makoto Umehara

Takeshi Toyama

Naoto Takahashi

Hiroyasu Ito

Wataru Tachiwa

Hitoshi Asai

Tadashi Takayama

Toshihiko Mimura

Tadashi Eguchi

Makoto Kobayashi

Keita Dan

Yasushi Maeda

Kyohei Inukai

A communication apparatus transmits or receives an Extremely High Throughput (EHT) single-user (SU) physical-layer protocol data unit (PPDU), an EHT extended range (ER) SU PPDU, or an EHT multi-user (MU) PPDU. The transmitted or received EHT PPDU includes an EHT signal field (EHT-SIG) which includes a field indicating information regarding semi-orthogonal multiple access (SOMA).

Communication apparatus, information processing apparatus, control method, and storage medium

If a communication apparatus is to transmit data to another communication apparatus and communication via a communication unit included in the other communication apparatus is not performable, whether or not to transmit a frame for causing a transition to a state where the communication via the communication unit included in the other communication apparatus is performable is selected based on an amount of data accumulated in a transmission queue in which the data is stored.

Communication apparatus, control method, and storage medium

A communication device that transmits or receives a radio frame including a preamble and a data field of a physical layer (PHY) is provided. The preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an EHT-SIG (Extremely High Throughput Signal Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), and the EHT-SIG includes a subfield in which information on whether NOMA (Non-Orthogonal Multiple Access) is used in transmission of data included in the data field is set.

Communication device, communication method thereof, information processing device, control method thereof, and storage medium

A communication device is provided that transmits or receives a radio frame including a preamble and a data field of a physical layer (PHY). The preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an EHT-SIG (Extremely High Throughput Signal Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), and the EHT-SIG includes a subfield in which information is set on whether NOMA (Non-Orthogonal Multiple Access) is used in transmission of data included in the data field.

If a communication apparatus transmits data to another communication apparatus and communication via a communication unit included in another communication apparatus is not performable, whether or not to transmit a frame for causing a transition to a state where the communication via the communication unit included in the other communication apparatus is performable is selected based on priority of the data.

A production apparatus ensures wireless communication without interference. An antenna portionat a robotic arm includes a transmitting antenna portionhaving a plurality of transmitting antennastoand a receiving antenna portionhaving a plurality of receiving antennasto. A transmitting side switcher circuitchanges over a transmitting antenna to be connected to a transmitteramong the plurality of transmitting antennastoin conjunction with an attitude information of the robotic arm, and changes an effective direction of a directional characteristic of the transmitting antenna portion. A receiving side switcher circuitchanges over a receiving antenna to be connected to a receiveramong the plurality of receiving antennastoin conjunction with the attitude information of the robotic arm and changes the effective direction of the directional characteristic of the receiving antenna portion

Production apparatus

A burst signal generator generates a burst signal that is a variable length portion whose length changes in accordance with fluctuations in data input at a predetermined period. An OFDM modulator generates an OFDM signal (including a guard interval portion and an effective symbol portion) that is a fixed length portion containing data corresponding to n (n is a positive integer) times or 1/n of the predetermined period. A frame includes the variable length portion and the fixed length portion. This makes a transmission signal actually have a frame period almost equal to the period of a signal synchronized with the clock of a player, including the fluctuations.

Transmission apparatus and method

A communication apparatus performs communication of data using assigned time slots within a frame. In a case where data cannot be transmitted in a transmission time slot that has been assigned in order to transmit data, a time slot later than this transmission time slot is reserved as a time slot used to transmit the data, this later time slot being reserved within the frame having the transmission time slot in which the data cannot be transmitted.

Communication apparatus, communication system, communication apparatus control method and non-transitory computer-readable storage medium

A communication system including a parent station and a plurality of child stations, the parent station and the plurality of child stations being line-connected or loop-connected in a plurality of stages, and the parent station comprises a decision unit configured to decide, based on information representing states of the plurality of child stations, which one a first data relay method of transmitting data to a subsequent station in accordance with a clock reproduced from data received from a preceding station and a second data relay method of transmitting data to the subsequent station in accordance with a local clock generated in a local station should be employed by each of the plurality of child stations.

Communication system, method of controlling the same, and storage medium

A method of controlling communication in a communication system includes a plurality of communication devices and a controller that transmits multi-channel data to the plurality of communication devices, executed in a communication device group to which power is supplied without passing through the controller, the method comprising the steps of determining a master communication device in the communication device group that sends the multi-channel data received wirelessly from the controller to other communication device included in the communication device group, according to wireless connection conditions between the controller and each communication device included in the communication device group, and sending, by the master via a wired connection, the multi-channel data received wirelessly from the controller to the other communication device included in the communication device group.

Communication control method, communication system and computer program

Data is transmitted by using continuous frames each of which includes a variable-length part having a length that varies depending on an input period and a fixed-length part containing data of one input period. The transmitted continuous frames are received, a frame period is detected, and data is reproduced based on the detected frame period.

Communication system, communication apparatus, and control method thereof

A transmitting device is provided that generates OFDM symbols by identifying a sampling frequency of input data that is input from an external device, determining a number of inverse Fourier transform sample points and a number of sampling points of a redundant data portion in accordance with the identified sampling frequency, and subjecting the input data to OFDM modulation using the determined number of sampling points. The transmitting device then transmits the generated OFDM symbols.

Transmitting device and control method thereof

In an information processing apparatus which is equipped with plural storage devices, there are provided a security information comparison unit for, in a case where data is moved from a movement source storage device to a movement destination storage device, comparing security information of the movement source storage device with security information of the movement destination storage device, and a data movement control unit for controlling the movement of the data based on a comparison result by the security information comparison unit. Thus, it is possible to strongly secure safety with respect to the movement and/or copy of the data among the storage devices by a user.

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Tokyo, Japan

Tomoyuki Takada