Abstract: The wireless communication system includes: a terminal station, a terrestrial base station, a plurality of node stations, a route control circuitry, and a management circuitry. The route control circuitry is configured to perform: calculating band usage rates of communication links formed among the plurality of node stations; setting a plurality of communication routes to be candidates; calculating cost values of the plurality of communication routes to be the candidates, based on the band usage rates and delay times; and comparing the cost values and selecting a communication route with the smallest cost value from among the plurality of communication routes to be the candidates. The management circuitry is configured to perform allocating bands to communication links included in the selected communication route. The terminal station and the terrestrial base station perform wireless communication using the bands allocated to the communication links included in the selected communication route.

Abstract: The present disclosure relates to a wireless communication system using a network to which an MEC technology is applied, and providing a stable service by controlling contents served from the edge server to the terminals as needed. The system includes a terminal which connects to a base station functionality provided within the network, an edge server provided within the network along with the base station functionality, and a non-edge server provided at a position away from the base station functionality within the network. The wireless communication system is configured to perform content replacement control for swapping the service handled by the edge server and the service handled by the non-edge server based on at least one of the required QoS of the services received by the terminal and the traffic volume generated by the group of terminals receiving the same service.

Abstract: A plurality of communication stations such as aerial vehicles, LEO satellites and GEO satellites transfer packets by mutually establishing links. A UE connects to the aerial vehicle providing a service area and transmits and receives packets to and from a data network. A route control device collects information on the required QoS corresponding to the service type of the UE, predicts the communication qualities of the links between the communication stations, and determines a communication path based on the communication qualities so that the required QoS is satisfied between the aerial vehicle and the data network. The communication stations included in the communication path receive distribution of a routing table including the transfer destination information of the traffic and transfer the packet according to the information.

Abstract: A wireless communication method according to one embodiment is a method, wherein wireless communication is established between at least one mobile transceiver station provided with a plurality of antennas and a base station provided with a plurality of antennas, the method including: estimating channel information for each of one or more channels based on location information for each of the antennas that transmit and receive radio waves; predicting an external factor affecting each channel for which channel information is estimated; calculating a channel capacity for each channel for which channel information is estimated based on the predicted external factor; determining a channel combination that maximizes the total channel capacity of wireless communication established between the at least one transceiver station and the base station based on each calculated channel capacity; and controlling an orientation of each antenna for transmitting and receiving radio waves based on the determined combination.

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: Provided is a communication system that adaptively performs optimal routing in a network formed by linking communication stations to each other. A routing control device monitors a traffic amount of links between communication stations including a satellite and a flight vehicle, calculates a cost used for routing in the communication stations including the satellite and the flight vehicle, and performs routing based on the cost. The calculation of the cost includes at least two of a process of calculating the congestion level of each of the links, a process of calculating a delay time of each of the links, and a process of calculating reliability of each of the links. The cost is calculated by combining results obtained by applying a weight to each of at least two elements obtained in the foregoing process.

Abstract: A wireless communication method according to an embodiment is a wireless communication method in which a plurality of moving node stations each equipped with a transmission buffer transmit data via switchable wireless communication paths, the wireless communication method including: an acquisition step of acquiring correspondence information corresponding to an amount of data transmitted by each of the node stations each time a communication status varies; a changing step of changing a cost value per unit link speed between the plurality of node stations on the basis of each piece of the acquired correspondence information; a calculation step of calculating cost values among the plurality of node stations using the changed cost values; and a determination step of determining, as a communication path, a path with a minimum sum of the calculated cost values.

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 system of the present disclosure is configured to establish a low delay communication path by linking node stations of a first group among a plurality of node stations constituting a wireless network. Further, the wireless communication system is configured to establish a high delay communication path by linking node stations of a second group among the plurality of node stations and at least one node station of the first group. The wireless communication system of the present disclosure transmits all traffic using the low delay communication path until the low delay communication path enters a congestion state, and transmits traffic having a long allowable delay time among all the traffic using the low delay communication path and the high delay communication path together upon receiving detection of a congestion state of the low delay communication path.

Abstract: A band sharing communication system in which there are an N-ary system and an N+1-ary system in descending order of priority of communication, the systems share frequency bands and allocation of a requested band of a terminal station of each system is performed, includes: occupied band setting means for setting an N-ary occupied band and an N+1-ary occupied band adjacent to the N-ary occupied band; band allocation means for allocating a vacant band of the N-ary occupied band with respect to a requested band of an N-ary terminal station and allocating a vacant band of the N+1-ary occupied band with respect to a requested band of an N+1-ary terminal station; and band transferring means for, when there is no vacant band in the N-ary occupied band with respect to the requested band of the N-ary terminal station, if a vacant band equivalent to the requested band is present in the N+1-ary occupied band such that the vacant band is adjacent to the N-ary occupied band, transferring the vacant band from the N+1-ary oc

Abstract: In a band sharing communication system in which there are a primary system and a secondary system in descending order of priority of communication, the systems share frequency bands, and a base station or a line control device performs allocation of a requested band of a terminal station of each system, the base station or the line control device includes: occupied band setting means for setting a primary occupied band and a secondary occupied band adjacent to the primary occupied band; band allocation means for allocating a vacant band of the primary occupied band with respect to a requested band of a primary terminal station and allocating a vacant band of the secondary occupied band with respect to a requested band of a secondary terminal station; and band transferring means for, when there is no vacant band in the primary occupied band with respect to the requested band of the primary terminal station, if a vacant band equivalent to the requested band is present in the secondary occupied band such that th

Abstract: A wireless communication monitoring system for monitoring a hardware failure of a wireless communication unit of a wireless communication device using a remote monitoring control device, in which the wireless communication device transmits or receives a predetermined radio signal to or from a monitoring device added or attached to the host device to perform a life and death check for checking an operation, and the remote monitoring control device detects a hardware failure of the wireless communication unit of the wireless communication device on the basis of a result of the life and death check received from the wireless communication device. This makes it possible to detect a failure that cannot be detected from information obtained from a device state request to a wireless communication device of the related art.

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: 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: 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: 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: In a band sharing communication system in which there are a primary system and a secondary system in descending order of priority of communication, the systems share frequency bands, and a base station or a line control device performs allocation of a requested band of a terminal station of each system, the base station or the line control device including: occupied band setting means for setting a primary occupied band and a secondary occupied band adjacent to the primary occupied band; band allocation means for allocating a vacant band of the primary occupied band with respect to a requested band of a primary terminal station and allocating a vacant band of the secondary occupied band with respect to a requested band of a secondary terminal station; and band transferring means for, when there is no vacant band in the primary occupied band with respect to a requested band of the primary terminal station, transferring a band of the secondary occupied band from the secondary occupied band to the primary occupi

Abstract: In a band sharing communication system in which there are a primary system and a secondary system in descending order of priority of communication, the systems share frequency bands, and a base station or a line control device performs allocation of a requested band of a terminal station of each system, the base station or the line control device includes: occupied band setting means for setting a primary occupied band and a secondary occupied band adjacent to the primary occupied band; band allocation means for allocating a vacant band of the primary occupied band with respect to a requested band of a primary terminal station and allocating a vacant band of the secondary occupied band with respect to a requested band of a secondary terminal station; and band transferring means for, when there is no vacant band in the primary occupied band with respect to the requested band of the primary terminal station, if a vacant band equivalent to the requested band is present in the secondary occupied band such that th

Abstract: Provided is a wireless communication control method, in which a management server manages line selection of an unlicensed band/licensed band of a UE and manages parameters of the unlicensed band, including a control step of excluding the UE that uses the licensed band from an optimization target in an unlicensed band system and optimizing the parameters of the unlicensed band in consideration of existence of an STA and the UE that uses the unlicensed band, which is caused by the management server. Furthermore, a pattern when a total of a communication capacity in the unlicensed band and a communication capacity in the licensed band after the optimization of the parameters of the unlicensed band becomes high is adopted for the line selection of the UE, and the parameters of the unlicensed band after the optimization of the line selection are set for an AP, the STA, and the UE of the unlicensed band.

Abstract: A band sharing communication system in which there are an N-ary system and an N+1-ary system in descending order of priority of communication, the systems share frequency bands and allocation of a requested band of a terminal station of each system is performed, includes: occupied band setting means for setting an N-ary occupied band and an N+1-ary occupied band adjacent to the N-ary occupied band; band allocation means for allocating a vacant band of the N-ary occupied band with respect to a requested band of an N-ary terminal station and allocating a vacant band of the N+1-ary occupied band with respect to a requested band of an N+1-ary terminal station; and band transferring means for, when there is no vacant band in the N-ary occupied band with respect to the requested band of the N-ary terminal station, if a vacant band equivalent to the requested band is present in the N+1-ary occupied band such that the vacant band is adjacent to the N-ary occupied band, transferring the vacant band from the N+1-ary oc