Abstract: Interference in preamble signals and pilot signals in cooperative transmission using interference suppressing technology is avoided. A wireless apparatus for transmitting a wireless signal on which directivity control has been performed to stations in a wireless system including at least one wireless apparatus is provided with a known signal generating unit which generates a known signal to be added to the wireless signal, a weighting processing unit which performs weighting on the known signal generated by the known signal generating unit, and a wireless processing unit which transmits the known signal on which the weighting has been performed by the weighting processing unit.

Abstract: A transmitting station includes a first wireless signal processing unit, a second wireless signal processing unit, and a link management unit. The first and second wireless signal processing units are configured to transmit wireless signals using different channels. The link management unit manages link states of the first and second wireless signal processing units. The link management unit is configured to: generate, when first data input is of a specific type, second data that is a duplicate of the first data; attach, first identification information indicating that the first data is original data, to the first data and attach, second identification information indicating that the second data is replicated data, to the second data; and output the first data with the first identification information attached to the first wireless signal processing unit and output the second data with the second identification information attached to the second wireless signal processing unit.

Abstract: A wireless apparatus according to an embodiment of the present invention includes: first and second processing units configured to transmit and receive wireless signals using different channels; and a link management unit configured to manage a first link between the first processing unit and a terminal and a second link between the second processing unit and the terminal, in which the link management unit receives a request signal requesting data exchange relating to a first traffic identifier from the terminal, associates the first traffic identifier with the second link based on the request signal, and when a second traffic identifier different from the first traffic identifier is associated with the second link, changes the association of the second traffic identifier from the second link to the first link based on the request signal.

Abstract: A base station according to an embodiment includes first and second wireless signal processing units, and a link management unit. The link management unit establishes a multi-link with a terminal apparatus by using the first and second wireless signal processing units, and sets an anchor link to be used in transmission and reception of control information regarding an operation of the multi-link. The link management unit transmits a first wireless frame requesting change of the anchor link by using the first wireless signal processing unit set to the anchor link, and changes the anchor link from the first wireless signal processing unit to the second wireless signal processing unit if either the first wireless signal processing unit or the second wireless signal processing unit receives a positive response from the terminal apparatus after the first wireless frame is transmitted.

Abstract: According to an embodiment, a base station includes first and second wireless signal processing units and a link management unit. The first and second wireless signal processing units transmit and receive a wireless signal using first and second channels, respectively. The link management unit sets a multi-link to a first or second state. In the first state, a first link in which the first wireless signal processing unit is used and a second link in which the second wireless signal processing unit is used are each in an active mode in which communication is possible. In the second state, the first link is in the active mode or an intermittent operation mode in which an operation is intermittent, and the second link is an operation pause mode in which power consumption is less than in the intermittent operation mode.

Abstract: Interference in preamble signals and pilot signals in cooperative transmission using interference suppressing technology is avoided. A wireless apparatus for transmitting a wireless signal on which directivity control has been performed to stations in a wireless system including at least one wireless apparatus is provided with a known signal generating unit which generates a known signal to be added to the wireless signal, a weighting processing unit which performs weighting on the known signal generated by the known signal generating unit, and a wireless processing unit which transmits the known signal on which the weighting has been performed by the weighting processing unit.

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 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 (10) according to one aspect of the present invention includes a plurality of radio signal processing units (130, 140, and 150), a carrier sense control unit (160), and a management unit (120). The plurality of radio signal processing units (130, 140, and 150) transmit and receive radio signals of different channels. The carrier sense control unit (160) executes collective carrier sensing on a channel of each of the plurality of radio signal processing units (130, 140, and 150) using an access parameter common to the plurality of radio signal processing units (130, 140, and 150) and determines whether the channel is in an idle state or busy state. The management unit (120) performs processing for transmitting radio signals by a multi-link wirelessly connected through a plurality of types of channels when there are a plurality of links formed between a radio signal processing unit having the channel determined to be in an idle state and a terminal (20).

Abstract: A base station according to an aspect of the present invention operates as a first base station (121) in a base station system (12) including the first base station (121) and a plurality of second base stations (122), the base station including a carrier sensing control unit (66) that determines whether a channel of each of the plurality of second base stations (122) is in an idle state or a busy state by using an access parameter common to the plurality of second base stations (122), and a processing unit (63) that transmits a first signal to be transmitted to a first wireless terminal (14) and a second signal to be transmitted to a second wireless terminal (14) using multi-user MIMO which uses the two or more second base stations (122) whose channels have been determined to be in the idle state in a coordinated manner.

Abstract: A base station (10-1) includes a radio signal processing unit (102) capable of using a first channel (CH4), a second channel (CH3), and a third channel (CH2). The radio signal processing unit is configured to perform signaling with a second other base station (10-3) using the second channel while performing signaling with a first other base station (10-4) using the first channel when the radio signal processing unit acquires transmission rights of the first channel, the second channel, and the third channel, and execute cooperative processing with at least one of the first other base station and the second other base station on the basis of a result of the signaling.

Abstract: A base station of an embodiment includes first and second wireless signal processing units and a link management unit. The link management unit establishes a multi-link with a terminal apparatus by using the first and second wireless signal processing units, and sets a primary link used as a main and a secondary link used as an auxiliary during the multi-link. The link management unit transmits a first wireless frame requesting a change of the primary link to the terminal apparatus by using the first wireless signal processing unit set to the primary link, and the link management unit changes the primary link from the first wireless signal processing unit to the second wireless signal processing unit if either the first or second wireless signal processor receives the affirmative response from the terminal apparatus after the first wireless frame is transmitted.

Abstract: A communication system including a mobile station that communicates with a wireless station and moves toward a predetermined destination, and a relay station that relays communication between the mobile station and the wireless station, includes: the mobile station that pauses movement when sensing an obstacle present on a first moving route toward the destination in a case of moving along the first moving route, and moves along a second moving route headed to the destination while avoiding the obstacle when establishing communication between the mobile station and the wireless station via the relay station in a case where the movement is paused; and the relay station that moves so as to keep a position where communication between the mobile station and the wireless station can be relayed according to movement of the mobile station when the mobile station moves along the second moving route.

Abstract: A base station of the embodiment includes first and second wireless signal processing units and a link management unit. The first and second wireless signal processing units are configured to transmit and receive wireless signals using first and second channels, respectively. The link management unit establishes a multi-link with a terminal apparatus using the first and second wireless signal processing units, sets the first wireless signal processing unit as a primary link, and sets the second wireless signal processing unit to a secondary link. When the secondary link is in an active mode and a first condition is satisfied, the link management unit sets the secondary link to the operation pause mode. When the secondary link is in an operation pause mode and a second condition is satisfied, the link management unit sets the secondary link to the active mode.

Abstract: A base station of an embodiment includes first and second wireless signal processing units, and a link management unit. The first wireless signal processing unit is configured to transmit and receive a wireless signal using a first channel. The second wireless signal processing unit is configured to transmit and receive a wireless signal using a second channel that is different from the first channel. The link management unit stores shared time information synchronizing multi-links. The link management unit establishes a multi-link with a terminal apparatus using the first and second wireless signal processing units, and causes each of the first and second wireless signal processing units to transmit a beacon signal including the shared time information while the multi-link is established.

Abstract: An interference source hunting method of hunting for an interference source of electromagnetic waves while moving between multiple measurement points, includes the steps of acquiring strength information of electromagnetic waves, estimating a distance from the measurement point to the location of the interference source, based on the strength information, calculating a first presence probability that the interference source is present at each position, based on whether a distance from the measurement point to the position is within the distance, updating second presence probabilities acquired in hunting in the past, based on the first presence probabilities, determining a position obtained by moving, by a predetermined distance, the measurement point toward a position with the second presence probability higher than the second presence probability at the measurement point, as a new measurement point, and determining, in a case where a size of an area in which each of the second presence probabilities is great

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: A base station (10) of an embodiment includes a first wireless signal processing unit, a second wireless signal processing unit, and a link management unit (120). The first wireless signal processing unit is configured to be able to transmit and receive wireless signals using the first band. The second wireless signal processing unit is configured to be able to transmit and receive wireless signals using a second band that is different from the first band. The link management unit manages a link state of the first wireless signal processing unit and a link state of the second wireless signal processing unit.

Abstract: A base station (20A) that, in a base station system (1) including a first base station (10) and at least two second base stations (20A, 20B), functions as the first base station (10), includes: a MAC processing unit (103) that performs MAC layer processing and generates a first MAC frame used in common between the first base station (10) and the second base station (20A); and a communication processing unit (105A) that transmits the first MAC frame to the second base station (20A).