Abstract: According to one embodiment, a wireless communication device includes a transmitter configured to transmit a beacon signal including first information to specify a first wireless communication device to be reassigned a slot and a start timing to allow use of a reassigned slot, and transmit, after transmission of the first information, a first signal including second information to specify the reassigned slot, the first signal being a signal different from the beacon signal and a receiver configured to receive a signal.

Abstract: According to one embodiment, a wireless communication apparatus includes controlling circuitry and transmitter circuitry. The controlling circuitry is configured to divide data into bit strings by a unit of a first number of bits; add at least one padding bit to one of the bit strings according to a difference between a number of bits of the one of the bit strings and the first number of bits, when the one of the bit strings has a number of bits less than the first number of bits; add error correction codes to the bit strings to generate encoded blocks, wherein each of the error correction codes has a second number of bits; combine the encoded blocks to generate encoded frames; and aggregate the encoded frames to generate a transmission packet. The transmitter circuitry is configured to transmit the transmission packet.

Abstract: According to one embodiment, a wireless communication device includes: a receiver configured to receive a first frame from a first terminal and a second frame from a second terminal; and controlling circuitry configured to obtain quality information of a first channel with the first terminal based on the first frame and quality information of a second channel with the second terminal based on the second frame, and determine a transmission rate applied to the first terminal and a transmission rate applied to the second terminal in spatially multiplexed transmission, based on the quality information of the first channel, the quality information of the second channel and interference amount information being indicative of an amount of interference depending on an execution condition of the spatially multiplexed transmission.

Abstract: According to one embodiment, an electronic apparatus includes controller circuitry, transmitter circuitry, and receiver circuitry. The controller circuitry is configured to judge whether a payload for a first packet comprises retransmission data; set a first PHY header for the first packet, when the payload does not comprise the retransmission data; set a second PHY header for the first packet, when the payload includes the retransmission data, wherein the second PHY header comprises an amount of information larger than an amount of information of the first PHY header; and generate the first packet comprising the payload and either one of the first PHY header or the second PHY header set for the first packet. The transmitter circuitry is configured to transmit the first packet. The receiver circuitry is configured to receive an ACK signal or a NACK signal for the first packet.

Abstract: A wireless communication apparatus which can simultaneously conduct communication on at least two frequency channels is described. The apparatus includes a communication unit which refers to a connection management table to determine a communication system which can be used by a wireless communication terminal using an identifier of the wireless communication terminal, and conducts communication with the wireless communication terminal on a second frequency channel using the communication system, when a request from the wireless communication terminal to change the first frequency channel to the second frequency channel is permitted.

Abstract: According to one embodiment, a wireless communication device includes a receiver and controlling circuitry. The receiver receives a first frame transmitted by a first wireless communication device in a predetermined frequency band. The controlling circuitry performs channel estimation based on the first frame to acquire channel information between the first wireless communication device and the wireless communication device. The receiver receives a second frame transmitted by a second wireless communication device. The controlling circuitry calculates, using the channel information, weight coefficients for a plurality of antennas to suppress reception of a signal from the first wireless communication device.

Abstract: According to one embodiment, a wireless communication device includes a transmitter configured to multiplex and transmit a plurality of first frames; a receiver configured to receive a plurality of second frames that represent acknowledgement responses to the plurality of first frames and are multiplexed and transmitted; and controlling circuitry. The first information necessary for transmission of the plurality of second frames is set in the plurality of first frames. The controlling circuitry is configured to separate the plurality of second frames based on the first information.

Abstract: A wireless communication device includes: controlling circuitry configured to selectively switch an operating channel between a first channel and a second channel; and a transmitter configured to transmit a first beacon signal through the first channel at a first cycle and transmit a second beacon signal through the second channel at a second cycle. A first period during which transmission/reception of a signal is possible and a second period during which transmission/reception of a signal is not performed are set for the second channel within a transmission interval of second beacon signals. The controlling circuitry switches the operating channel from the second channel to the first channel during the second period. The transmitter transmits the first beacon signal through the first channel during the second period. The controlling circuitry switches the operating channel from the first channel to the second channel by an end of the second period.

Abstract: According to one embodiment, a wireless device includes a receiver configured to receive a first beacon signal via a first channel; and control circuitry. The control circuitry is configured to: analyze the first beacon signal to obtain channel information for specifying a second channel, change an operation channel of the receiver from the first channel to the second channel, and change, in a case of not receiving a second beacon signal via the second channel during a predetermined period of time, the operation channel of the receiver from the second channel to the first channel. The receiver is further configured to receive a third beacon signal via the first channel after the operation channel is changed from the second channel to the first channel.

Abstract: According to one embodiment, a wireless device includes a receiver configured to receive a first beacon signal via a first channel; and control circuitry. The control circuitry is configured to: analyze the first beacon signal to obtain channel information for specifying a second channel, change an operation channel of the receiver from the first channel to the second channel, and change, in a case of not receiving a second beacon signal via the second channel during a predetermined period of time, the operation channel of the receiver from the second channel to the first channel. The receiver is further configured to receive a third beacon signal via the first channel after the operation channel is changed from the second channel to the first channel.

Abstract: A wireless communication apparatus which can simultaneously conduct communication on at least two frequency channels is described. The apparatus includes a communication unit which refers to a connection management table to determine a communication system which can be used by a wireless communication terminal using an identifier of the wireless communication terminal, and conducts communication with the wireless communication terminal on a second frequency channel using the communication system, when a request from the wireless communication terminal to change the first frequency channel to the second frequency channel is permitted.

Abstract: According to one embodiment, a communication processing device is provided which is mounted on a wireless communication device that performs communication using a first channel and performs communication by a communication scheme different from that of the first channel using a second channel. The communication processing device includes a control circuitry to determine whether or not transmission data is data that needs to be preferentially transmitted, specify at least one channel from the first channel and the second channel according to a determination result, and perform control so as to transmit the transmission data using the specified channel.

Abstract: According to one embodiment, a wireless communication device includes a receiver and a transmitter. The receiver is configured to receive a first packet including a first information and, after reception of the first packet, receive a second packet in a predetermined frequency band. The transmitter is configured to transmit a third packet in the predetermined frequency band simultaneously with reception of the second packet with a transmission power equal to or less than a maximum transmission power based on the first information.

Abstract: According to one embodiment, a wireless communication device includes: a receiver, controlling circuitry and a transmitter. The receiver is configured to receive a first packet transmitted in a predetermined frequency band. The controlling circuitry is configured to detect a first information from a received portion of the first packet. The transmitter is configured to transmit a second packet in the predetermined frequency band prior to completion of reception of the first packet with a transmission power not larger than a maximum transmission power depending on the first information.

Abstract: According to one embodiment, a wireless communication device includes a receiver and controlling circuitry. The receiver receives a first frame transmitted by a first wireless communication device in a predetermined frequency band. The controlling circuitry performs channel estimation based on the first frame to acquire channel information between the first wireless communication device and the wireless communication device. The receiver receives a second frame transmitted by a second wireless communication device. The controlling circuitry calculates, using the channel information, weight coefficients for a plurality of antennas to suppress reception of a signal from the first wireless communication device. The receiver receives, using the weight coefficients, a third frame transmitted in the predetermined frequency band from the second wireless communication device after a predetermined time from transmission of the second frame.

Abstract: A wireless communication device includes a transmitter and a receiver. The transmitter transmits a first frame containing notification information to specify first and second wireless terminals and a second frame for channel estimation. The receiver receives a third frame transmitter from the first wireless terminal and a fourth frame transmitted from the second wireless terminal. The third frame and the fourth frame are transmitted in a multiplexing scheme by the first and the second wireless terminals. The third frame contains first channel information estimated based on the second frame. The fourth frame contains second channel information estimated based on the second frame. The first frame contains at least either information to specify a preamble of the third frame and a preamble of the fourth frame or information to specify a subcarrier used for transmission of the third frame and a subcarrier used for transmission of the fourth frame.

Abstract: According to one embodiment, a wireless device includes a receiver configured to receive a first beacon signal via a first channel; and control circuitry. The control circuitry is configured to: analyze the first beacon signal to obtain channel information for specifying a second channel, change an operation channel of the receiver from the first channel to the second channel, and change, in a case of not receiving a second beacon signal via the second channel during a predetermined period of time, the operation channel of the receiver from the second channel to the first channel. The receiver is further configured to receive a third beacon signal via the first channel after the operation channel is changed from the second channel to the first channel.

Abstract: A wireless device performs communication of a first access period and a second access period, the first access period including a plurality of slots in which communication is performed on a slot basis by allocating the slots and the second access period including a plurality of slots in which communication is performed in a contention-based access scheme on a slot basis, and includes a transmitter, a receiver and an control circuitry. The control circuitry performs, when one slot in the second access period is determined, carrier-sensing during a period of time depending on a type of the frame, and controls to transmit via the transmitter the frame at a timing defined depending on the type of the frame after the period of time.

Abstract: According to one embodiment, a wireless device includes a receiver configured to receive a first beacon signal via a first channel; and control circuitry. The control circuitry is configured to: analyze the first beacon signal to obtain channel information for specifying a second channel, change an operation channel of the receiver from the first channel to the second channel, and change, in a case of not receiving a second beacon signal via the second channel during a predetermined period of time, the operation channel of the receiver from the second channel to the first channel. The receiver is further configured to receive a third beacon signal via the first channel after the operation channel is changed from the second channel to the first channel.

Abstract: According to one embodiment, a wireless communication device includes: controlling circuitry configured to set at least one of: a first transmission prohibition period for a first network to which the wireless communication device belongs; or a second transmission prohibition period for a second network, and to determine, when a first frame addressed to another device is received in a case that the first transmission prohibition period is not set and the second transmission prohibition period is set, a state of a wireless medium based on comparing a reception level of the first frame with a threshold defined corresponding to one of the first network and the second network, to which a sender of the first frame belongs.