Abstract: A transmitting station which is a station that transmits a wireless signal includes a first wireless signal processing unit, a second wireless signal processing unit, and a transmission timing adjustment unit. The first wireless signal processing unit transmits and receives a wireless signal using a first channel. The second wireless signal processing unit transmits and receives a wireless signal using a second channel different from the first channel. The transmission timing adjustment unit adjusts transmission timings of first data and second data on the basis of a first status associated with the first wireless signal processing unit and a second status associated with the second wireless signal processing unit.

Abstract: An access point 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 first wireless terminal apparatus using the first and second wireless signal processing units. The link management unit is capable of setting at least the multi-link to a first operation mode and sets the first and second wireless signal processing units to an intermittent operation mode in the first operation mode. When the multi-link is set to the first operation mode and first data addressed to the first wireless terminal apparatus is input, the link management unit causes at least one wireless signal processing unit associated with a traffic identifier attached to the first data to transmit a beacon signal including information indicating that the first data has been buffered.

Abstract: A wireless communication system includes a plurality of wireless communication apparatuses that constitutes a wireless communication network and one or a plurality of control apparatuses that controls the plurality of wireless communication apparatuses. The plurality of wireless communication apparatuses includes a base station, a first wireless terminal, and a second wireless terminal. Each of the base station and the first wireless terminal includes N (N is an integer of two or more) network interface controllers (NICs), and the second wireless terminal includes M (M<N) NICs. The control apparatus executes channel switching processing of switching a use state of the N NICs in the base station and the first wireless terminal. The control apparatus controls the base station and the first wireless terminal to use NICs of the same channel in the same period.

Abstract: A wireless communication system includes a plurality of wireless communication apparatuses forming a wireless communication network. The system also includes one or a plurality of control apparatuses that controls the plurality of wireless communication apparatuses. Each of the plurality of wireless communication apparatuses includes a plurality of network interface controllers (NICs) that performs wireless communication through different channels that do not overlap each other. The control apparatus executes channel switching processing of switching a use state of the plurality of NICs in each wireless communication apparatus. The control apparatus controls the plurality of wireless communication apparatuses to use NICs of the same channel in the same period. The control apparatus controls to share connection information regarding each of the plurality of NICs in advance before the channel switching processing.

Abstract: A wireless communication management apparatus includes a determination unit, an evaluation unit, and a selection unit. The determination unit determines an interference relationship of a combination of bandwidth and channel on the basis of wireless environment information collected from one or more terminals capable of wireless communication with a base station. The evaluation unit calculates an evaluation value for each combination of bandwidth and channel on the basis of the interference relationship. The selection unit selects one combination from the combinations of bandwidth and channel on the basis of the evaluation value.

Abstract: A wireless communication management apparatus (100) according to one aspect of the present invention includes a path calculation unit (152) that, on the basis of wireless environment information collected from one or more relay base stations (210) and a plurality of terminals (300) configured to wirelessly communicate with a root base station (200), calculates one or more path candidates which are connectable paths that can be taken as a network configuration by multi-hop communication and in which a traffic amount of each relay base station (210) included in the connectable paths is less than a threshold, and a determination unit (153) that determines one of the one or more path candidates as an optimal path.

Abstract: The interference control system provides a control device disposed in a public network with a resource application based on a message issued regarding use of a wireless resource by an interfering device disposed in a carrier network. A response based on a message issued by the control device in response to the resource application is provided to the interfering device that has issued the resource application. A repeater estimates, on the basis of interfered-with device information, an increase amount in the total amount of interference caused in each of used frequency channels of the interfered-with device in a case where the interfering device performs transmission in each of frequency channels with a prescribed transmission power. An estimation result of the increase amount is reflected in at least one of the resource application from the interfering device and the response to the interfering device.

Abstract: In a wireless communication system in which an AP 1 and a plurality of STAs 2 perform wireless communication, the AP 1 notifies each of the STAs 2 of a schedule of channel transition including a transition destination channel and a timing of channel transition different for each of the STAs 2 (or each group thereof), and then executes a channel switching process, and when the STA 2 receives the schedule of channel transition, the STA 2 stops transmission, and thereafter executes a connection process with the AP 1 at the timing according to the schedule. It is possible to shorten the time until the communication with the AP is resumed by avoiding collision of wireless frames between the terminals (STAs) when the channel is changed.

Abstract: A communication method determination apparatus includes a comparison unit and an instruction unit. The comparison unit obtains a bit string of a portion of a physical header for synchronization from a wireless frame that includes the physical header for synchronization in which information for synchronization in a physical layer is set and a physical data portion in which data of a higher-level layer than the physical layer is set, and compares the obtained bit string with a bit string pattern specific to a communication method targeted for determination. The instruction unit performs communication method determination processing for determining whether or not the communication method targeted for determination is used for the wireless frame, based on a result of comparison.

Abstract: A data processing apparatus (14) according to an embodiment includes a data processing unit (105) and a wireless unit (104). The wireless unit receives the data converted by the data processing unit and wirelessly transmits the input data to an access point. The data processing unit converts, when a remaining amount input from a battery (12) is in a first state, the input data with a first setting and outputs the converted data to the wireless unit. The data processing unit converts, when the remaining amount of the battery is in a second state different from the first state, the input data with a second setting and outputs the converted data to the wireless unit. A capacity per unit time of the data after conversion is different between the first setting and the second setting.

Abstract: A base station of an embodiment includes a first wireless signal processing unit, a second wireless signal processing unit, and a beacon management unit. The first wireless signal processing unit is configured to be able to transmit and receive a wireless signal using a first channel. The second wireless signal processing unit is configured to be able to transmit and receive a wireless signal using a second channel different from the first channel. The beacon management unit manages transmission of a beacon of the first wireless signal processing unit so that the first beacon is periodically transmitted from the first radio signal processing unit, and manages transmission of a beacon of the second wireless signal processing unit so that the first beacon and a second beacon including information simplified than information included in the first beacon are periodically switched and transmitted from the second wireless signal processing unit.

Abstract: An interference wave arithmetic operation method performed by a wireless communication system including a plurality of antennas, the method including: determining an interferer antenna on the basis of information regarding directivity, a position, and an orientation of each of the plurality of antennas; and calculating interference wave reception intensity of a victim antenna using an interference wave from the determined interferer antenna.

Abstract: Provided is an interference control system for wireless communication suitable for limiting the total amount of interference given to an interfered device to be protected by a large number of interfering devices. The system provides a control device disposed in a public network with a resource application based on a message issued regarding use of a radio resource by an interfering device disposed in a carrier network. A response based on a message issued by the control device with respect to the resource application is provided to the interfering device that has issued the resource application. A resource table including information in which availability of frequency in carrier network is estimated is updated on the basis of the resource application and the response. The information in which the availability is estimated and included in the resource table is reflected in the resource application.

Abstract: Provided is an interference control system for wireless communication suitable for limiting the total amount of interference to which an interfered-with wireless communicator to be protected is subjected by interfering wireless communicators. A repeater disposed between the interfering wireless communicator and a controller includes a processor and a memory storing a program executed by the processor. The processor acquires registration information including a position and a transmission power for each interfering wireless communicator, and estimates, for each interfering wireless communicator, a terminal range in which there is a likelihood that a terminal wireless communicator communicating with the interfering wireless communicator is present based on the position and the transmission power. The processor transmits a registration application including the terminal range to the control device.

Abstract: Provided is an interference control system for wireless communication suitable for limiting the total amount of interference given to an interfered device to be protected by a large number of interfering devices. An interference control system includes a subscriber database that stores information regarding a position of each interfering device. A registration application (5) including an ID of an interfering device disposed in a carrier network is received from the interfering device. The registration application is received and position information that matches information stored in the subscriber database regarding the ID is set (2), (3), and (6). The position information is transmitted to the control device for registration (6).

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: Object A grease composition having a low dust generation, long life, and low low-temperature torque under an ultra high-speed, high-temperature environment with a rotational speed exceeding 30000 rpm is provided, and by applying the grease composition to a rolling bearing, the rolling bearing having a low dust generation, long life and low low-temperature torque, and a motor including such a rolling bearing are also provided. Resolution Means Provided are: a grease composition containing a base oil and a thickener, the base oil including a fluorine oil, an ester oil, and a polyalphaolefin oil, and the thickener including a fluorine-based thickener, a urea-based thickener, and a barium complex soap thickener, each of these components being included in the grease composition at a predetermined proportion; a rolling bearing filled with the grease composition; and a motor including the rolling bearing.

Abstract: A transmitting station (TX) of an embodiment includes first and second radio signal processing units (STA1 and STA2) and a link management unit (LM). The link management unit establishes multi-link with a receiving station by using the first and second radio signal processing units, and manages communication using the multi-link. The link management unit distributes a plurality of data units to the first and second radio signal processing units. The first radio signal processing unit transmits a first data unit group among the plurality of data units to the receiving station, and transmits first information indicating the sequence number of the data unit included in the first data unit group to the receiving station.

Abstract: A wireless apparatus according to one aspect of the present invention includes a reception unit configured to receive, on a frequency channel, a frame including first identification information for identifying the priority level of the frame, and a carrier sensing control unit configured to determine a threshold based on the first identification information, and determine a usage state of the frequency channel based on a comparison between received power of the frame and the determined threshold.

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.