Abstract: Provided is a wireless communication system that includes a transmission device configured to receive an input of group-addressed data transmitted from a specific source, convert the group-addressed data into wireless frames, and perform group-addressed transmission of the wireless frames; and a reception device configured to receive the wireless frames transmitted from the transmission device, and identify and acquire the group-addressed data of the specific source. The transmission device includes coding means for defining a plurality of wireless frames as a frame block, performing error correction coding on the frame block, and performing group-addressed transmission of the frame block, and the reception device includes decoding means for identifying the frame block from the received wireless frames, performing error correction decoding in units of frame block, and reconfiguring the group-addressed data of the specific source.

Abstract: A wireless communication management apparatus (100) includes a correction unit (1131), an evaluation unit (1132), and a determination unit (1133). The correction unit (1131) corrects, on the basis of a characteristic of each terminal, an error rate in wireless communication between a base station and the terminal based on wireless environment information collected from one or more terminals configured to wirelessly communicate with the base station. The evaluation unit (1132) evaluates the corrected error rate. The determination unit (1133) determines a modulation/demodulation scheme for each terminal on the basis of the evaluation result of the evaluation unit.

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 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 wireless communication characteristics evaluation method for evaluating wireless communication characteristics of a wireless communication system where a plurality of wireless communication terminals perform communication by transmitting or exchanging signals, the wireless communication characteristics evaluation method including: a step 1 of acquiring power and a band of an interference signal; a step 2 of calculating an interference band rate showing a rate of the band of the interference signal that overlaps with a band of a desired signal; a step 3 of calculating an interference power rate from interference power and the interference band rate and furthermore, calculating steady noise power from the interference power and the interference power rate; a step 4 of determining a real SINR from received power of the desired signal and the steady noise power; and a step 5 of determining wireless communication characteristics of the desired signal from the real SINR.

Abstract: Provided is a wireless communication system in which, based on a random access scheme, a transmission opportunity (TXOP) acquired by a wireless access point is granted to a wireless station when performing uplink data transmission from the wireless station to the wireless access point and the TXOP acquired by the wireless station is granted to the wireless access point when performing downlink data transmission from the wireless access point to the wireless station, the system includes a scheduling unit for TXOP granting determining one or more wireless stations having a quality of an uplink data transmission lower than a prescribed value as TXOP responders to which the wireless access point grants the TXOP, and determining one or more wireless stations having a quality of a downlink data transmission lower than the prescribed value as TXOP holders which grant the TXOP to the wireless access point.

Abstract: A wireless communication management apparatus (100) includes a remaining capacity prediction unit (122) and a time setting unit (123). The remaining capacity prediction unit (122) predicts a remaining capacity (BLafter) of a battery (305) at a time point after a predetermined period has passed in a wireless communication device (300) on which the battery (305) is mounted. The time setting unit (123) sets a condition that the remaining capacity (BLafter) of the battery (305) predicted by the remaining capacity prediction unit (122) is greater than an allowable remaining capacity (BLminreq) and each of an operating time (Ton) and a transmittable time (Ttx) of the wireless communication device (300) falls within the reference range, and sets the operating time (Ton) and the transmittable time (Ttx) of the wireless communication device (300) in a state where the condition is satisfied.

Abstract: A wireless communication management apparatus (100) includes: a reception unit (112) that receives first wireless environment information from a terminal (300) configured to wirelessly communicate with a base station (200); a generation unit (113) that generates first control information of the terminal on the basis of first wireless environment information; and a transmission unit (115) that transmits the first control information to update a setting of the terminal.

Abstract: Provided is a wireless communication management apparatus that performs optimal control in units of base stations. A wireless communication management apparatus (100) includes an acquisition unit (1131), a determination unit (1132, 1133), and a notification unit (115). The acquisition unit (1131) acquires wireless environment information related to a terminal (300) connected to a base station (200). The determination unit (1132, 1133) determines a control value that satisfies a throughput for transmitting data from the terminal (300) to the base station (200) based on the acquired wireless environment information. The notification unit (115) notifies the terminal (300) of the determined control value.

Abstract: A data processing apparatus according to an embodiment includes a signal processing unit and a control unit. The signal processing unit is configured to receive data wirelessly transmitted from the terminal apparatus. The control unit executes a first operation under a constraint condition related to wireless communication of the terminal apparatus. The first operation includes: determining a transmission control parameter used for wireless communication of the terminal apparatus; and repeatedly determining a transmission control parameter again using the determined transmission control parameter when the determined transmission control parameter is different from the transmission control parameter before the determination. The control unit is configured to apply the transmission control parameter obtained through the first operation to the terminal apparatus.

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: Provided is a wireless communication system in which, based on a random access scheme, a transmission opportunity (TXOP) acquired by a wireless access point is granted to a wireless station when performing uplink data transmission from the wireless station to the wireless access point and the TXOP acquired by the wireless station is granted to the wireless access point when performing downlink data transmission from the wireless access point to the wireless station, the system includes a scheduling unit for TXOP granting determining one or more wireless stations having a quality of an uplink data transmission lower than a prescribed value as TXOP responders to which the wireless access point grants the TXOP, and determining one or more wireless stations having a quality of a downlink data transmission lower than the prescribed value as TXOP holders which grant the TXOP to the wireless access point.

Abstract: A wireless base station setting position calculation method includes a step S1 for assuming the setting area to be a rectangle, receiving an input of longitudinal and lateral lengths of a setting area and the number of wireless base stations to be set “s”, and determining one or more candidates of a number of divisions “d” of the setting area according to the number of wireless base stations “s”, a step S2 for representing the number of divisions “d” in a division ratio x:y and selecting, for each number of divisions “d”, according to the longitudinal and lateral lengths of the setting area, a division ratio at which diagonal line lengths of divided areas are minimized, a step S3 for performing, for each number of divisions “d”, adjustment of a division pattern until a difference m between the number of divisions “d” and the number of wireless base stations “s” decreases to 0, a step S4 for calculating, for each number of divisions “d”, a sum of the diagonal line lengths of the divided areas and selecting the

Abstract: A method includes a step 1 of performing processing for determining wireless terminal stations that are inside cover areas of existing wireless base stations, and excluding the existing wireless base stations and the wireless terminal stations inside the cover areas from a wireless base station installation area, a step 2 of performing processing for optimizing, with respect to each first wireless terminal station that is outside the cover areas of the existing wireless base stations and has been left in the processing for excluding in the step 1, a combination of the first wireless terminal station and the closest additional wireless base station from which received power is the largest, and optimizing installation positions of additional wireless base stations, a step 3 of determining, with respect to the combinations of the additional wireless base stations and the first wireless terminal stations that were optimized in the step 2, whether wireless terminal stations are inside or outside cover areas of the

Abstract: A wireless system according to an embodiment includes at least one terminal and a base station. The terminal includes a wireless communication module and a first control unit. The wireless communication module transmits and receives data to and from the base station. When motion is detected from an acquired video, the first control unit transmits a frame image, which is a still image extracted from the video, to the base station by using the wireless communication module, and transmits the video to the base station by using the wireless communication module when transmission of the video is requested by the base station as a result of transmitting the frame image. The base station includes a second control unit. The second control unit determines whether or not to request transmission of a video on the basis of a frame image, and requests a terminal to transmit a video when determining to request transmission of a video.

Abstract: A base station according to an embodiment includes an antenna, a wireless device, a wireless information acquisition unit, a control unit, a directivity setting unit, a directivity control unit, and a communication instruction unit. The antenna has an omni-directional array antenna. The wireless device communicates with one or more terminals in a cover area by using a wireless signal via the antenna. The wireless information acquisition unit acquires wireless information including the position of the terminal and a communication time block. On the basis of the wireless information, the control unit determines a communication execution time block, which is a time block for executing communication with the terminal, and an antenna gain of the antenna for communicating with the terminal. On the basis of the antenna gain, the directivity setting unit sets a directivity pattern of the omni-directional array antenna so as to have directivity in the direction of the terminal.

Abstract: A wireless communication method in a wireless communication system includes carrier sense processing for determining whether a carrier sense band is in a busy state or an idle state on the basis of a reception state of a reception signal in the carrier sense band before transmitting a transmission signal using a transmission channel. The carrier sense band is set so as to include not only a transmission channel band which is a frequency band of a transmission channel but also an adjacent carrier sense band adjacent to the transmission channel band. When it is determined that the carrier sense band is in an idle state, transmission processing for transmitting a transmission signal by using a transmission channel is performed.

Abstract: A radio communication apparatus according to an embodiment includes a radio communication unit (1011), a radio information acquisition unit (1013), and a transmission condition setting unit (104). The radio communication unit transmits a radio signal. The radio information acquisition unit continuously acquires radio information containing received signal strength in the radio communication unit. The transmission condition setting unit sets a transmission time slot for transmitting the radio signal in the radio communication unit and an index value of a modulation and error correction coding rate in the radio communication unit in accordance with the radio information.

Abstract: A radio communication apparatus according to an embodiment includes a first radio communication unit (1011) that transmits a radio signal by using a first channel, a second radio communication unit (1021) that transmits a radio signal by using a second channel different from the first channel, a first radio information acquisition unit (1013) that acquires first radio information containing received signal strength in the first radio communication unit and usage of the first channel, a second radio information acquisition unit (1023) that acquires second radio information containing received signal strength in the second radio communication unit and usage of the second channel, a determination unit (104) that determines whether to switch between the first radio communication unit and the second radio communication unit in accordance with the first radio information and the second radio information, and a switching unit (105) that switches between the first radio communication unit and the second radio communi

Abstract: In a wireless communication system including a plurality of base stations to which one or more terminal stations are connectable, and a base station control device which controls each of the base stations, the base station control device includes an information collection unit configured to collect connection information regarding the terminal stations connected to the base stations from each of the base stations, a list generation unit configured to generate a white list indicating the terminal stations which are allowed to be connected to the base stations for each of the base stations based on the connection information, and a transmission unit configured to transmit the white list generated by the list generation unit to each of the base stations, and each of the base stations includes a reception unit configured to receive the white list transmitted by the transmission unit, and a setting unit configured to perform setting so as to allow or inhibit connection of each of the terminal stations to the base