Abstract: Provided is a wireless communication system in which a plurality of basic service sets (BSSs) performing wireless transmission from a transmitting station to a destination station by performing access control based on CSMA/CA exist adjacent to each other, and in which wireless communication is performed by controlling a CCA threshold considering an interference power value between each BSS that uses the same channel, in which the transmitting station includes a control block determining the CCA threshold value according to the interference power value of the BSS considered as an interference source, calculating a SINR in the destination station according to the interference power value, determining a MCS which is a combination of a modulation scheme and a code rate according to the SINR, and performing the access control based on the CSMA/CA.

Abstract: A predetermined STA includes a station information collection unit collecting from the STA itself and other STAs station information used for selection of STAs performing simultaneous transmission and for control of the simultaneous transmission, and a simultaneous-transmission request unit knowing occurrence of a QoS data frame based on the station information and transmitting a request frame requesting the simultaneous transmission to an AP. The AP includes a station information collection unit; a simultaneous-transmission determination unit selecting a combination of the STAs performing the simultaneous transmission based on the station information by reception of the request frame; and a trigger transmission unit transmitting to each of the STAs performing the simultaneous transmission a trigger frame instructing to performs the simultaneous transmission and including information necessary for controlling the simultaneous transmission.

Abstract: Sampling timings at a plurality of measurement points at which waveform data of a power line is sampled are easily synchronized to each other. A measurement device includes: a sampling unit configured to sample a waveform of at least one of a voltage and a current at a measurement point of a power line at a predetermined sampling timing; a processing unit configured to execute processing of the waveform sampled by the sampling unit; a time information acquisition unit configured to acquire time information from a time information provision device that is communicatively connected through a network; and an adjustment unit configured to adjust a processing timing of the processing on the basis of the time information acquired by the time information acquisition unit.

Abstract: A format that includes a BSSID of a transmitting station within a preamble of the frame is an HE format, and a format that does not include a BSSID within the preamble but includes a BSSID in a MAC header is a Non-HE format; and a wireless station in the BSS includes a control part which checks a format of a frame received at a predetermined receiver sensitivity or above, and continues demodulation of the received frame if the format is HE format and the BSSID in the received frame is consistent with its own BSS, and stops the demodulation of the received frame if the HE format and the BSSID in the received frame is not consistent with its own BSS.

Abstract: There is provided a wireless station including a plurality of standard controls corresponding respectively to a plurality of wireless communication standards sharing a frequency resource, the wireless station including a simultaneous transmissions management part setting a parameter for a random access process corresponding to each of the plurality of wireless communication standards for each of the plurality of standard controls, controlling frequencies and transmission start timings of the plurality of wireless communication standards, and simultaneously transmitting wireless frames of each of the wireless communication standards which obtained the transmission opportunities using FDMA, the plurality of standard controls are configured to simultaneously transmit the wireless frames of the plurality of wireless communication standards using FDMA, with the frequency resource which obtained the transmission opportunities by performing the random access process corresponding to each of the wireless communicatio

Abstract: A format that includes a BSSID of a transmitting station within a preamble of the frame is an HE format, and a format that does not include a BSSID within the preamble but includes a BSSID in a MAC header is a Non-HE format; and a wireless station in the BSS includes a control part which checks a format of a frame received at a predetermined receiver sensitivity or above, and continues demodulation of the received frame if the format is HE format and the BSSID in the received frame is consistent with its own BSS, and stops the demodulation of the received frame if the HE format and the BSSID in the received frame is not consistent with its own BSS.

Abstract: A predetermined STA includes a station information collection unit collecting from the STA itself and other STAs station information used for selection of STAs performing simultaneous transmission and for control of the simultaneous transmission, and a simultaneous-transmission request unit knowing occurrence of a QoS data frame based on the station information and transmitting a request frame requesting the simultaneous transmission to an AP. The AP includes a station information collection unit; a simultaneous-transmission determination unit selecting a combination of the STAs performing the simultaneous transmission based on the station information by reception of the request frame; and a trigger transmission unit transmitting to each of the STAs performing the simultaneous transmission a trigger frame instructing to performs the simultaneous transmission and including information necessary for controlling the simultaneous transmission.

Abstract: A predetermined STA includes a station information collection unit collecting from the STA itself and other STAs station information used for selection of STAs performing simultaneous transmission and for control of the simultaneous transmission, and a simultaneous-transmission request unit knowing occurrence of a QoS data frame based on the station information and transmitting a request frame requesting the simultaneous transmission to an AP. The AP includes a station information collection unit; a simultaneous-transmission determination unit selecting a combination of the STAs performing the simultaneous transmission based on the station information by reception of the request frame; and a trigger transmission unit transmitting to each of the STAs performing the simultaneous transmission a trigger frame instructing to performs the simultaneous transmission and including information necessary for controlling the simultaneous transmission.

Abstract: A predetermined STA includes a station information collection unit collecting from the STA itself and other STAs station information used for selection of STAs performing simultaneous transmission and for control of the simultaneous transmission, and a simultaneous-transmission request unit knowing occurrence of a QoS data frame based on the station information and transmitting a request frame requesting the simultaneous transmission to an AP. The AP includes a station information collection unit; a simultaneous-transmission determination unit selecting a combination of the STAs performing the simultaneous transmission based on the station information by reception of the request frame; and a trigger transmission unit transmitting to each of the STAs performing the simultaneous transmission a trigger frame instructing to performs the simultaneous transmission and including information necessary for controlling the simultaneous transmission.

Abstract: In a wireless communication system in which an AP and a plurality of STAs are connected to each other and the AP simultaneously transmits a wireless frame destined for each STA with FDMA, in which the AP includes a control frame transmission unit that generates a control frame having information on a frequency resource allocated to the each STA and transmits the control frame on a primary channel being used in a shared manner by the each STA and a wireless frame transmission unit that simultaneously transmits the wireless frame destined for the each STA on the frequency resource allocated to the each STA, and in which the STA includes a frequency resource selection reception unit that receives the control frame on the primary channel and receives a wireless frame destined for the STA itself on a frequency resource notified by the control frame.

Abstract: A predetermined STA includes a station information collection unit collecting from the STA itself and other STAs station information used for selection of STAs performing simultaneous transmission and for control of the simultaneous transmission, and a simultaneous-transmission request unit knowing occurrence of a QoS data frame based on the station information and transmitting a request frame requesting the simultaneous transmission to an AP. The AP includes a station information collection unit; a simultaneous-transmission determination unit selecting a combination of the STAs performing the simultaneous transmission based on the station information by reception of the request frame; and a trigger transmission unit transmitting to each of the STAs performing the simultaneous transmission a trigger frame instructing to performs the simultaneous transmission and including information necessary for controlling the simultaneous transmission.

Abstract: A wireless communication apparatus is provided that is capable of performing setting of a wireless LAN access point so that frequency utilization efficiency of an entire wireless communication system that includes wireless LAN access points of different manufacturers and different model numbers is improved.

Abstract: A centralized management device includes an information collection unit that collects interference power level information including received power levels from neighboring access points causing interference to the access points, a received power level from each station being a destination of the access points, and transmission power level information including a transmission power level of the access points, and a control value decision unit that decides an interference detection threshold and a transmission power level in the access points according to an acquisition frequency of transmission opportunity and an estimated value of throughput that are computed, from the collected information, based on an interference relationship and notifies the decided interference detection threshold and the transmission power level as control values to the access points; and the access points performs control of the interference detection threshold and the transmission power level based on the control values notified from

Abstract: A centralized management device includes an information collection unit that collects interference power level information including received power levels from neighboring access points causing interference to the access points, a received power level from each station being a destination of the access points, and transmission power level information including a transmission power level of the access points, and a control value decision unit that decides an interference detection threshold and a transmission power level in the access points according to an acquisition frequency of transmission opportunity and an estimated value of throughput that are computed, from the collected information, based on an interference relationship and notifies the decided interference detection threshold and the transmission power level as control values to the access points; and the access points performs control of the interference detection threshold and the transmission power level based on the control values notified from

Abstract: There is provided a wireless station including a plurality of standard controls corresponding respectively to a plurality of wireless communication standards sharing a frequency resource, the wireless station including a simultaneous transmissions management part setting a parameter for a random access process corresponding to each of the plurality of wireless communication standards for each of the plurality of standard controls, controlling frequencies and transmission start timings of the plurality of wireless communication standards, and simultaneously transmitting wireless frames of each of the wireless communication standards which obtained the transmission opportunities using FDMA, the plurality of standard controls are configured to simultaneously transmit the wireless frames of the plurality of wireless communication standards using FDMA, with the frequency resource which obtained the transmission opportunities by performing the random access process corresponding to each of the wireless communicatio

Abstract: A format that includes a BSSID of a transmitting station within a preamble of the frame is an HE format, and a format that does not include a BSSID within the preamble but includes a BSSID in a MAC header is a Non-HE format; and a wireless station in the BSS includes a control part which checks a format of a frame received at a predetermined receiver sensitivity or above, and continues demodulation of the received frame if the format is HE format and the BSSID in the received frame is consistent with its own BSS, and stops the demodulation of the received frame if the HE format and the BSSID in the received frame is not consistent with its own BSS.

Abstract: Provided is a wireless communication system in which a plurality of basic service sets (BSSs) performing wireless transmission from a transmitting station to a destination station by performing access control based on CSMA/CA exist adjacent to each other, and in which wireless communication is performed by controlling a CCA threshold considering an interference power value between each BSS that uses the same channel, in which the transmitting station includes a control block determining the CCA threshold value according to the interference power value of the BSS considered as an interference source, calculating a SINR in the destination station according to the interference power value, determining a MCS which is a combination of a modulation scheme and a code rate according to the SINR, and performing the access control based on the CSMA/CA.

Abstract: In order to provide a wireless communication system capable of improving the throughput of wireless communication by effectively using frequency resources, in a wireless communication system in which a first wireless access point which communicates with one or more wireless stations within a first cell by orthogonal frequency-division multiple access and a second wireless access point which is capable of performing carrier sensing with the first wireless access point and communicates with one or more wireless stations within a second cell by the orthogonal frequency-division multiple access operate in cooperation with each other, the first wireless access point includes a transmission opportunity acquiring unit which acquires a transmission opportunity when data to be transmitted is generated; and a transmitting unit of permission for use which transmits permission for use of channels which are not scheduled to use within the first cell, to the second wireless access point in a period in which the transmissio

Abstract: There is provided a wireless communication system which can improve throughputs in wireless communication by effectively using frequency resources. In the wireless communication system including a plurality of wireless communication stations which may operate as wireless communication terminals or wireless base stations, the wireless communication station includes an access right acquisition means of acquiring an access right upon generating transmitting data; a determination means of determining whether or not different data destined to a plurality of wireless communication stations can be transmitted on different channels according to OFDMA; and a data transmitting means of transmitting data to the receivable wireless communication stations using OFDMA when the determination means determines that different data destined to a plurality of wireless communication stations can be transmitted on different channels.

Abstract: In a wireless communication system in which an AP and a plurality of STAs are connected to each other and the AP simultaneously transmits a wireless frame destined for each STA with FDMA, in which the AP includes a control frame transmission unit that generates a control frame having information on a frequency resource allocated to the each STA and transmits the control frame on a primary channel being used in a shared manner by the each STA and a wireless frame transmission unit that simultaneously transmits the wireless frame destined for the each STA on the frequency resource allocated to the each STA, and in which the STA includes a frequency resource selection reception unit that receives the control frame on the primary channel and receives a wireless frame destined for the STA itself on a frequency resource notified by the control frame.