Abstract: According to one embodiment, a wireless communication device, includes a receiver configured to receive a first field, receive at least one of a plurality of second fields having been multiplexed and transmitted, and decode the one of the second fields to obtain a frame in a case where first information identifying the wireless communication device is not set in the first field, and a controller configured to suppress access to a wireless medium during a period indicated by a value set in the frame.

Abstract: A wireless communication apparatus supports a first scheme and a second scheme. A communication range for the second scheme is narrower than a communication range for the first scheme. Processing circuitry of the apparatus is configured to set first information and second information. If the second scheme is used, the processing circuitry sets a second level greater than a first level for the second information and sets a second power value smaller than a first power value for the first information. The first level and the first power value are used for the first scheme. The second power value is decided based on a receiving sensitivity required for a physical scheme selected by the second scheme.

Abstract: According to one embodiment, a wireless communication device, includes: a receiver configured to receive a first frame that requests permission of transmission; and controlling circuitry configured to perform control to prevent transmission in a case where the first frame is not addressed for the own device, wherein the controlling circuitry is configured to keep prevention of the transmission even when a second frame notifying the permission of transmission is not received after a lapse of a first time period following receipt of the first frame.

Abstract: According to one embodiment, a wireless communication device, includes a receiver configured to receive a first field, receive at least one of a plurality of second fields having been multiplexed and transmitted, and decode the one of the second fields to obtain a frame in a case where first information identifying the wireless communication device is not set in the first field, and a controller configured to suppress access to a wireless medium during a period indicated by a value set in the frame.

Abstract: According to one embodiment, an electronic apparatus includes a power transmitter, detect circuitry and control circuitry. The power transmitter is configured to transmit a power by an electromagnetic wave of a power transmission frequency band according to a power transmission period. The detect circuitry is configured to detect a power in a frequency band different from the power transmission frequency band. The control circuitry is configured to determine the power transmission period based on a first threshold value, a second threshold value, a third threshold value and a fourth threshold value.

Abstract: A wireless communication apparatus supports at least a second wireless communication scheme between a first wireless communication scheme and the second wireless communication scheme. The first wireless communication scheme requires that a wireless medium is determined to be busy when a reception level is equal to or greater than a minimum reception sensitivity level of a physical scheme. The apparatus includes first and second processing units. The first processing unit is configured to set a value lower than a maximum transmission power of the first wireless communication scheme, for a maximum transmission power of the second wireless communication scheme and set a value greater than the minimum reception sensitivity level of the physical scheme, for a carrier sense level, when the second wireless communication scheme is used. The second processing unit is configured to carry out carrier sense using the carrier sense level.

Abstract: According to one embodiment, an electronic apparatus communicable with a measurement apparatus includes a power supplier and control circuitry. The power supplier is configured to supply power by an electromagnetic wave. The control circuitry is configured to receive first information on a wireless signal measured by the measurement apparatus and control the electromagnetic wave for power supply based on both the first information and a position of the measurement apparatus.

Abstract: According to one embodiment, a wireless device includes: a receiver configured to receive a first frame and a second frame; and processing circuitry. The processing circuitry is configured to determine, when a reception level of the first frame is a first threshold or more, whether a transmission source of the first frame belongs to a same wireless network as the wireless device, determine, when the transmission source of the first frame belongs to the same wireless network as the wireless device, a second threshold based on a reception level of the first frame, and perform, when a reception level of the second frame is a second threshold or more, reception processing of the second frame.

Abstract: An electronic apparatus includes processing circuitry configured to select a first interval to be used for an access to a medium when a first condition is satisfied. The first interval has a fixed length shorter than DIFS (distribute coordination function inter frame space) defined in IEEE802.11 standard. The processing circuitry is also configured to select a second interval to be used for the access to the medium when a second condition different from the first condition is satisfied. The second interval has a fixed length equal to or longer than the DIFS defined in the IEEE802.11 standard. The electronic apparatus also includes wireless circuitry configured to access the medium to transmit a radio wave conforming to a first wireless specification different from the IEEE802.11 standard after the medium is idle for the selected first or second interval.

Abstract: A wireless communication device includes a receiver configured to receive first information to designate a first bandwidth narrower than a maximum available bandwidth extended based on a predetermined channel, and to receive second information to designate a plurality of channels including at least one channel different from a channel in the first bandwidth among a plurality of channels in the maximum bandwidth; and controlling circuitry configured to specify a plurality of channels for use in communication based on at least the second information.

Abstract: According to one embodiment, a wireless communication device includes controlling circuitry configured to adjust a directivity of each of a plurality antennas based on a received power of a first frame for each of the plurality of antennas; and a transmitter configured to transmit a second frame for responding to the first frame after the directivity is adjusted.

Abstract: A wireless communication apparatus includes a transmission and reception processing unit which communicates using a first communication scheme, by using either a first inter frame spaces of a first type or the second inter frame spaces of the first type, wherein the second inter frame spaces is larger than the first inter frame spaces, the second inter frame spaces is determined based on an inter frame space used in a second communication scheme.

Abstract: A wireless communication device includes a receiver configured to receive first information to designate a first bandwidth narrower than a maximum available bandwidth extended based on a predetermined channel, and to receive second information to designate a plurality of channels including at least one channel different from a channel in the first bandwidth among a plurality of channels in the maximum bandwidth; and controlling circuitry configured to specify a plurality of channels for use in communication based on at least the second information.

Abstract: According to one embodiment, a wireless communication device includes controlling circuitry configured to adjust a directivity of each of a plurality antennas based on a received power of a first frame for each of the plurality of antennas; and a transmitter configured to transmit a second frame for responding to the first frame after the directivity is adjusted.

Abstract: According to one embodiment, a wireless communication device includes a first receiver; a second transmitter; a controller; and a pre-equalizer. The controller switches a reception frequency of the first receiver from a first frequency to a second frequency and a transmission frequency of the first transmitter from the second frequency to the first frequency, at a first timing. The pre-equalizer pre-equalizes a second signal, based on channel state information of a first signal received in the first receiver before the first timing. The first transmitter transmits the pre-equalized second signal, after the first timing.

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.

Abstract: A radio communication method stores a plurality MAC frames for each of a plurality of destinations. The method decides the longest transmission time of transmission times needed to transmit the plurality of MAC frames to each of the plurality of destinations within a fixed period. The method generates a plurality of physical frames for the plurality of destinations to transmit them at the same time by connecting the plurality of MAC frames and adding additional information to each connected MAC frame so as to be a frame length equivalent to a transmission time equal to the longest transmission time.

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.

Abstract: A wireless communication device according to an aspect of the present invention includes a transmitter, a receiver, and a signal processor. The transmitter transmits a first signal. The receiver receives a second signal which includes information indicating a transmission channel characteristic at the time of transmission of the first signal. The signal processor acquires the transmission channel characteristic at the time of transmission of the first signal from the second signal, estimates a reception channel characteristic at the time of reception of the second signal from the second signal, and estimates a transmission channel characteristic at a time later than a time associated with the acquired transmission channel characteristic on the basis of the acquired transmission channel characteristic and the estimated reception channel characteristic. The transmitter transmits a third signal on the basis of the estimated transmission channel characteristic.

Abstract: A wireless communication device according to an aspect of the present invention includes a transmitter, a receiver, and a signal processor. The transmitter transmits a first OFDM signal. The receiver receives a second OFDM signal. The signal processor detects a first timing that is a symbol timing for the first OFDM signal, detects a second timing that is a symbol timing for the second OFDM signal, determines a setup value for a symbol length of a new first OFDM signal on the basis of the first timing and the second timing, and generates the new first OFDM signal, the symbol length of which is adjusted to the setup value.