Abstract: A physical layer (PHY) preamble that includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal Field (L-SIG), an Extremely High Throughput Signal A Field (EHT-SIG-A) including a field of four or more bits indicating the number of Space-Time Streams, an EHT Short Training Field (EHT-STF) and an EHT Long Training Field (EHT-LTF) in this order is used.

Abstract: A communication device transmits a radio frame including a preamble and a data field of a physical (PHY) layer. The preamble includes an L-STF, an L-LTF, an L-SIG, an EHT-SIG-A, an EHT-STF, and an EHT-LTF, the EHT-SIG-A includes a subfield indicating information of a modulation scheme and a code rate (MCS, Modulation and Coding Scheme), the data field includes data modulated and encoded in accordance with the modulation scheme and the code rate indicated by the subfield, and the subfield is configured to be capable of designating one of at least 2048QAM and 4096QAM as the modulation scheme.

Abstract: A communication apparatus transmits a request signal to an apparatus operating in a second operation mode among operation modes including a first operation mode using a first wireless communication unit and the second operation mode using a second wireless communication unit operable with lower power consumption than the first wireless communication unit. The request signal for causes the apparatus to transition from the second operation mode to the first operation mode. The communication apparatus determines whether transmitting the request signal is prioritized, and decides a parameter in the request signal that is used to avoid an access conflict in a wireless communication band, based on a result of the decision.

Abstract: A communication device selects whether to communicate with another communication device via a constructing device configured to construct a wireless network or communicate via a direct wireless interface based on a fact that the another communication device selected by a user is one redundantly detected by both a search method via the constructing device and a search method without intervention of the constructing device.

Abstract: A communication apparatus operable to communicate with a plurality of terminal stations capable of operating in a Doze state and in an Awake state in an IEEE 802.11ba standard, obtains, from each of the plurality of terminal stations, a value of a Transition delay indicating a time period required to switch from the Doze state to the Awake state, groups the plurality of terminal stations into a plurality of groups based on the value of each of the plurality of terminal stations, sets an order for transmitting the Wake-up frame for causing a transition from the Doze state to the Awake state for each of the plurality of groups, and transmits, according to the set order, the Wake-up frame to one or more terminal stations belonging to each of the plurality of groups.

Abstract: When a plurality of other communication apparatuses parallelly communicates with a first communication apparatus by using a frequency band assigned by the first communication apparatus to each of the plurality of other communication apparatuses including a second communication apparatus, a transmission rate when communicating with the second communication apparatus is set based on a communication time in communication with a third communication apparatus included in the plurality of other communication apparatuses.

Abstract: A communication apparatus obtains, from each of a plurality of other communication apparatuses, an amount of buffered data of the each of the plurality of other communication apparatuses, divides the plurality of other communication apparatuses into a plurality of groups based on the amount of buffered data of each of the plurality of other communication apparatuses, and assigns to each of the groups wireless frequency resources for which a shared data communication time is set.

Abstract: A wireless communication apparatus 20 includes: a first communication unit configured to perform wireless communication that supports a plurality of wireless communication systems with different using frequency bands; a second communication unit configured to perform wired communication that supports a plurality of wired communication systems each with a different basic frequency used in data communication; and a switching unit configured to switch a wired communication system used in the wired communication by the second communication unit so that the basic frequency falls outside a predetermined frequency band including the using frequency bands of the wireless communication by the first communication unit.

Abstract: A communication device selects whether to communicate with another communication device via a constructing device configured to construct a wireless network or communicate via a direct wireless interface based on a fact that the another communication device selected by a user is one redundantly detected by both a search method via the constructing device and a search method without intervention of the constructing device.

Abstract: A communication apparatus sets a first antenna direction to be used in a first time slot among a plurality of time slots, and a second antenna direction to be used in a second time slot among the plurality of time slots, transmits first data in the first time slot by using a first communication path using the first antenna direction, retransmits the first data in the second time slot by using a second communication path using the second antenna direction if transmission of the first data has failed, and transmits second data different in type from the first data in the second time slot by using the second communication path using the second antenna direction if transmission of the first data has succeeded.

Abstract: The present invention has an object to prevent an automatic download from overlapping usage of the mobile communication terminal completely or as much as possible. In order to achieve the above-described objective, the present invention provides a mobile communication terminal includes: a wireless communication portion; and a control portion which downloads software via the wireless communication portion from a software distribution apparatus connected to a network, wherein the control portion, when an update operation is conducted by using the downloaded software, displays a screen indicating end of operations of system software of the mobile communication terminal.

Abstract: A communication apparatus sets a first antenna direction to be used in a first time slot among a plurality of time slots, and a second antenna direction to be used in a second time slot among the plurality of time slots, transmits first data in the first time slot by using a first communication path using the first antenna direction, retransmits the first data in the second time slot by using a second communication path using the second antenna direction if transmission of the first data has failed, and transmits second data different in type from the first data in the second time slot by using the second communication path using the second antenna direction if transmission of the first data has succeeded.

Abstract: A communication apparatus allocates timeslots, indicating intervals usable for transmission or reception of data, to each of a first and a second apparatuses, and communicates a result of the allocation to the first and the second apparatuses. The communication apparatus allocates the timeslots so that a timeslot allocated for the first apparatus to transmit/receive a first type of data to/from a partner apparatus overlaps with a timeslot allocated for the second apparatus to transmit/receive the first type of data to/from a partner apparatus, and a timeslot allocated for the first apparatus to transmit/receive a second type of data to/from a partner apparatus does not overlap with a timeslot allocated for the second apparatus to transmit/receive the second type of data to/from a partner apparatus.

Abstract: Regarding an apparatus capable of transmitting data using a high-rate transmission channel having narrow directivity and a low-rate transmission channel having wide directivity, data is not correctly sent in some cases because a communication path for the high-rate transmission channel is easily interrupted. In contrast, it is not possible to realize sending of high-quality data using the low-rate transmission channel. The same data is simultaneously transmitted using the high-rate transmission channel and the low-rate transmission channel. The data that has been received using the high-rate transmission channel or the data that has been received using the low-rate transmission channel is selected in accordance with a state of reception using the high-rate transmission channel.

Abstract: Communication bands occupied by wireless communication paths extending from a source node to a destination node are determined, and a combination of wireless communication paths is selected based on spatial distances between wireless communication paths from combinations of wireless communication paths in each of which the number of communication bands with respect to a combination of wireless communication paths is smaller than a threshold.

Abstract: A WiMAX compatible base station (BS) includes: an allocator unit (10B, 10C) configured to allocate allocation information of the downlink burst (DL-MAP) as transmission information in a first region (MAP region), and to allocate the downlink burst as transmission information in the second region (downlink burst region); and a transmitter unit (10F) configured to transmit the allocation information of the downlink burst with a non-directional beam, and to transmit the downlink burst with a non-directional beam or a directional beam. When detecting an unused region (A) where no transmission information is allocated after allocating the transmission information in the first region and the second region in the frame structure, the allocator unit is configured to reallocate, by use of the detected unused region, the allocation information of the downlink burst as the transmission information in the first region.

Abstract: A WiMAX compatible base station (BS) includes: an allocator unit (10B, 10C) configured to allocate allocation information of the downlink burst (DL-MAP) as transmission information in a first region (MAP region), and to allocate the downlink burst as transmission information in the second region (downlink burst region); and a transmitter unit (10F) configured to transmit the allocation information of the downlink burst with a non-directional beam, and to transmit the downlink burst with a non-directional beam or a directional beam. When detecting an unused region (A) where no transmission information is allocated after allocating the transmission information in the first region and the second region in the frame structure, the allocator unit is configured to reallocate, by use of the detected unused region, the allocation information of the downlink burst as the transmission information in the first region.

Abstract: There is provided a control section 82 having a first function of commencing receipt of broadcast contents data in accordance with an open/closed state of the housing that is a result of detection performed by the housing status detection section or completing receiving operation in consideration of the content of received data; a second function of commencing or completing, during receipt of broadcast contents data, saving of data into a storage section 83 in accordance with the open/closed state of the housing that is a result of detection performed by the housing status detection section; and a third function of commencing or completing, during receipt of the broadcast contents data, playback of the data saved in the storage section 83 in accordance with the open/closed state of the housing that is a result of detection performed by the housing status detection section.

Abstract: Method, device, computer program and information storage means for transmitting a source frame into a video display system, the video display system (10) comprising a plurality of projectors, the video display system (10) further arranged to produce a projected image (106) from the source frame (100), each projector (102, 103, 104, 105) arranged to display a sub-frame (106A, 106B, 106C, 106D) of the projected image (106). The video display system further comprises capability to arrange a display delay, equal to a delay between reception of a source frame synchronization signal and a sub-frame display synchronization signal, dependent on the positions and the orientations of the video projectors, such that display of the projected image begins before at least one projector has received an associated complete sub-frame.

Abstract: A communication system that transmits a plurality of pieces of video data to be synthesized and output to a plurality of output apparatus after dividing into a plurality of pieces of video having different qualities, in which, in a case where the plurality of pieces of video data are transmitted to the plurality of apparatus to synthesize and output the data, it is so configured that a difference in video quality is made so as not to be remarkable even when each apparatus cannot receive the video data having the same quality, wherein a reception state of the video data in each output apparatus of the plurality of output apparatus is determined and the quality of the video data to be synthesized and output is decided according to the reception state of the video data in each output apparatus, thereby outputting the video data having thus decided quality.