Abstract: A communication system includes a terminal configured to wirelessly communicate with a base station, a plurality of IoT terminals, and a control device. The control device includes a processor; and a memory that includes instructions, which when executed, cause the processor to execute the following steps: selecting an IoT terminal around a dead zone and transmitting a command of signal transmission to the selected IoT terminal. The selected IoT terminal includes a receiver configured to receive the command, and a transmitter configured to transmit a signal according to the command. The terminal receiving the signal transmitted from the selected IoT terminal performs a connection operation for avoiding the dead zone.

Abstract: In a station installation design method executed by a computer used as a station installation design apparatus that performs station installation design for a wireless system including a plurality of base stations having different wireless systems between at least two base stations, the station installation design method includes a reception power calculation step of calculating reception power from the base station in each terminal to be an evaluation point for each of one or the plurality of base stations arranged in a temporary installation state in a target area, a transmission rate acquisition step of converting each reception power calculated in the reception power calculation step into a transmission rate by using a conversion table prepared for each wireless system, and an arrangement step of changing the base station selected from one or the plurality of base stations in the temporary installation state based on a station installation design evaluation index value in consideration of a cost of the ba

Abstract: A control apparatus for controlling movable wireless stations, the control apparatus includes a first calculation unit configured to calculate combination candidates of movement routes of a plurality of movable wireless stations where a distance between the movement routes of the plurality of movable wireless stations is equal to or more than a first distance or a maximum distance, a second calculation unit configured to calculate combination candidates of movement timing and movement speed where the distance between the plurality of movable wireless stations becomes equal to or more than a second distance or a maximum distance from the combination candidates of the movement routes of the plurality of movable wireless stations, and a movement instruction unit configured to instruct the plurality of movable wireless stations to move by using a combination where a movement time or a movement distance of the plurality of movable wireless stations is the minimum or a combination where a movement time or a movemen

Abstract: A radio signal strength information calculation method performed by a control apparatus includes: calculating radio information regarding each of a plurality of meshes into which an area where base stations are placed is divided and generating mesh radio information; and placing a virtual base station at a position to where any of the base stations would be moved in the area, and calculating radio signal strength information between a plurality of base stations including the base stations and the virtual base station based on the mesh radio information.

Abstract: A scheduling control apparatus that calculates a weight for scheduling a terminal in a wireless system including a plurality of base stations includes: an information acquisition unit configured to acquire information regarding a connection state between each of the plurality of base stations and the terminal; a weight calculation unit configured to calculate, for each base station of the plurality of base stations, a weight indicating an allocation ratio of communication amounts between one or a plurality of terminals connected to the base station; and a control unit configured to notify the base station of the weight. The weight calculation unit calculates the weight by repeating processing for updating the weight so that an error between expected wireless communication quality obtained when the weight is given to each of the terminals and required wireless communication quality of each of the terminals is small.

Abstract: In a base station control system including a first base station whose deployment position has not been determined and a base station control apparatus, the base station control apparatus reduces a deviation in the number of terminals connected to each base station by including a clustering unit configured to repeat clustering for dividing a plurality of terminals into clusters for each of the first base station and a second base station while fixing a position of the existing second base station to which the plurality of terminals is connected and changing a position of the first base station, a calculation unit configured to calculate a number of first terminals connected to the first base station and a number of second terminals connected to the second base station for each of a plurality of transmission powers of the first base station in a case where the first base station is deployed at a position at a point in time at which the clustering is completed, and a selection unit configured to select a transmi

Abstract: A wireless LAN system where an interfering communication device is present around a base station device and a terminal device includes an interference control signal transmitter that transmits an interference control signal that causes the interfering communication device to wait for transmission, and an interference control signal management device that collects wireless environment information, sets wireless LAN communication between the base station device and the terminal device, which are protection targets, as protected communication, and causes the interference control signal transmitter to transmit an interference control signal that causes the interfering communication device to wait for transmission, and the interference control signal management device instructs the interference control signal transmitter to start transmitting the interference control signal when detecting a start of the protected communication and instructs the interference control signal transmitter to stop transmitting the inter

Abstract: A radio communication method includes: a transmitting step of broadcasting, by a radio base station, a connection condition of the radio base station; a managing step of managing, by the radio base station, a connection with a radio station requesting a connection to the radio base station based on the connection condition, by using a blockchain shared by a plurality of radio base stations; and a changing step of acquiring, by the radio base station, information on a radio station connected to another radio base station from the blockchain and changing the connection condition of the radio base station based on the information on the radio station connected to the other radio base station.

Abstract: A radio connection control method executed by a computer includes: setting, for a second base station to which no terminal is connected, second identification information different from first identification information for connecting to an existing first base station to which a plurality of terminals are connected, as identification information for connecting to the second base station; and notifying some of the plurality of terminals of the second identification information to connect the some of the plurality of terminals to the second base station.

Abstract: A communication system including a control server apparatus and a movable base station device, wherein the control server apparatus is configured to select, as a movement destination position of the movable base station device, a position at which a movement distance from a current position of the movable base station device is minimum, among positions at which a base station position evaluation index is equal to or larger than a threshold, or a position at which the base station position evaluation index is maximum, among positions at which the movement distance from the current position of the movable base station device is equal to or smaller than a threshold, and wherein the control server apparatus is configured to perform control to move the movable base station device to the movement destination position.

Abstract: In a base station control system including a first base station and a base station control apparatus, the base station control apparatus reduces a deviation in the numbers of terminals connected to base stations by including a setting unit configured to set, to the first base station, at least one of a first threshold value regarding a reception power from a terminal in the first base station and a second threshold value indicating an maximum number of a number of terminals connected to the first base station as a threshold value for limiting terminals capable of connecting to the first base station.

Abstract: In a base station control system, a base station control apparatus includes circuitry configured to select one combination pattern from combination patterns regarding possible combinations of one or more first base stations that are each to couple to one or more terminals among terminals coupled to at least one second base station, based on the number of first terminals and the number of second terminals. The combination patterns include candidate positions of each first base station, and include transmitted power candidates of the first base station that are at the candidate positions.

Abstract: An embodiment of the present invention is a local wireless communication system that emits a radio wave in a licensed band to form a wireless communication environment in a predetermined area. The system includes a base station configured to emit a radio wave, a plurality of sensors disposed along an edge of the area, and a control apparatus. The sensors each measure a radio field intensity of the radio wave emitted from the base station, and feed the radio field intensity back to the control apparatus via the base station. The control apparatus controls a transmission power of the radio wave from the base station to control the fed radio field intensity.

Abstract: Provided are: an extraction unit that, based on input information from an external source, extracts position information regarding a transmitting station and a receiving station and the frequency of radio waves transmitted by the transmitting station; a calculation unit that calculates the three-dimensional distance between the transmitting station and the receiving station and the free space loss of radio waves based on the position information and the frequency; a processing unit that performs processing for, with use of a two-dimensional image of a region that includes the transmitting station and the receiving station, extracting the edges of structures that reflect radio waves in the two-dimensional image; a generation unit that generates input data for use in machine learning, based on the position information, the three-dimensional distance, the free space loss, and the edge; and a learning unit that performs machine learning to estimate the propagation characteristics of radio waves between the transm

Abstract: A base station deployment position selection method executed by a computer includes calculating, in an area where a first base station to which a plurality of terminals are connected is deployed, for each of a plurality of candidates for a deployment position of a second base station, in a case where the second base station is deployed at the deployment position being a candidate, a number of first terminals connected to the first base station and a number of second terminals connected to the second base station; and selecting one candidate from the plurality of candidates based on the number of first terminals and the number of second terminals.

Abstract: A base station control system includes a first base station of which a disposition position is not determined, and a base station control device including a memory and a processor configured to: divide an existing second base station and terminals connected to the second base station into clusters through clustering; determine a position corresponding to a cluster not including the second base station among the plurality of clusters as a disposition position of the first base station; calculate the number of first terminals connected to the first base station and the number of second terminals connected to the second base station for each of a plurality of transmission powers of the first base station in a case where the first base station is disposed at the position; and select a transmission power of the first base station based on the number of first terminals and the number of second terminals.

Abstract: Provided is a control apparatus in a wireless communication system including the control apparatus and a movable base station, the control apparatus including: an information acquisition unit that acquires shield sensing information; a shield map generation unit that generates a shield map on the basis of the shield sensing information; a communication quality calculation unit that calculates an estimated received power in each coverage area element or each terminal for each position and direction of an antenna of the movable base station on the basis of the shield map, calculates an estimated communication quality in each coverage area element or each terminal on the basis of the estimated received power, and calculates an index value for controlling the movable base station on the basis of the estimated communication quality; and a base station control unit that controls the position and direction of the antenna of the movable base station so that the index value is maximized.

Abstract: Provided is a wireless communication system that performs priority control by setting, depending on a type of transmission data, a channel use period during which exclusive use of a channel after a right to access the channel is acquired is permitted. The wireless communication system includes a measurement unit that measures quality measurement information related to a quality of wireless communication, a parameter setting unit that makes, when a latency in transmission of a prioritized frame due to transmission of a non-prioritized frame is not expected based on the quality measurement information measured by the measurement unit, settings such that the channel use period for the transmission of the non-prioritized frame is changed to be longer, and a MAC frame generation unit that generates a MAC frame which permits continuous transmission of the non-prioritized frames within the channel use period set by the parameter setting unit.

Abstract: A radio parameter control method is performed by a control device that includes a memory and a processor, for a plurality of base stations constituting a radio network. The method includes: collecting radio environment information in the radio network and communication quality information for each communication area provided by each of the base stations; determining whether to perform radio parameter control based on the communication quality information; calculating a radio parameter for at least one of the base stations based on the radio environment information in a case where it is determined that the radio parameter control is to be performed; and setting the calculated radio parameter in said at least one of the base stations.

Abstract: A communication control system includes a computer including a memory and a processor configured to acquire information regarding a wireless communication device and environment information that affects wireless communication quality; predict future wireless communication quality based on the information regarding the wireless communication device and the environment information; control, based on the future wireless communication quality, a target device to achieve wireless communication quality depending on a user's purpose, the user using wireless communication; receive a request from another system connected via a network; and execute at least one or more of acquisition of the information and the environment information, prediction of the future wireless communication quality, or control of the target device in combination in response to the request.