Abstract: A wireless communication system is a wireless communication system including a base station that transmits and receives a signal to and from a terminal, and a relay station that relays a signal between the base station and the terminal, in which the base station includes a scheduling function unit that determines a schedule of transmission and reception of signals to and from a plurality of terminals 20, and transmits schedule information indicating the determined schedule to the relay station, and the relay station includes a schedule information acquisition unit that acquires the schedule information from the base station, and a beam control unit that specifies a terminal being a transmission destination based on the schedule information, and controls a beam used for relay for each terminal specified as a transmission destination based on a beam number specified for each terminal in advance.

Abstract: A communication system includes a terminal configured to wirelessly communicate with a base station and a control device. The terminal includes a transmission unit that transmits location information of the terminal. The control device includes a processor; and a memory that includes instructions, which when executed, cause the processor to execute the following steps: setting an area around a dead zone as a preliminary dead area, acquiring location information of the terminal, and determining whether the terminal is in the preliminary dead area by comparing the location information of the terminal with the preliminary dead area and performing control for switching a connection destination of the terminal when the determining determines that the terminal is in the preliminary dead area.

Abstract: To properly consider the QCL assumption about SSBs in an NR-U carrier, a user terminal according to one aspect of the present disclosure is characterized by having a receiving section that receives a Synchronization Signal Block (SSB), and a control section which acquires an effective SSB index based on a demodulation reference signal (DeModulation Reference Signal (DMRS)) of a broadcast channel (Physical Broadcast Channel (PBCH)) included in the SSB, and from a payload of the PBCH, acquires at least one of information on the number of effective SSB indexes to be transmitted and a start location index of an SSB burst including the SSB within a Discovery Reference Signal (DRS) transmission window.

Abstract: In order to suppress degradation of communication quality due to radio interference or the like, or occurrence of extra operating power consumption or the like of a wireless base station when the number of the wireless terminals in the wireless area is smaller than expected, a radio communication system includes a plurality of wireless base stations installed in a wireless area, and includes: a calculation unit configured to calculate an operating state pattern of the plurality of wireless base stations according to a state of a wireless terminal in the wireless area; an acquisition unit configured to acquire a state of the wireless terminal in the wireless area; and a control unit configured to control, on the basis of the operating state pattern, an operating state of the plurality of wireless base stations according to the state of the wireless terminal acquired by the acquisition unit.

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: A wireless communication system including a relay station apparatus capable of relaying wireless communication between one or more base station apparatuses and a terminal apparatus using a plurality of systems, and a control apparatus, the relay station apparatus acquires the quality between the terminal apparatus and each base station apparatus for which the relay station apparatus performs relaying, and the relay station apparatus for each system, and notifies the control apparatus of the acquired quality, and the control apparatus determines a data transmission method for each of a communication path between each base station apparatus and the relay station apparatus and a communication path between the relay station apparatus and the terminal apparatus on the basis of the quality and the priority of the terminal apparatus, and notifies the relay station apparatus of the determined data transmission method.

Abstract: Provided is a wireless communication system including: one or more mobile wireless station devices that communicate with one or more terminal devices; and a control device, in which the control device calculates, on the basis of a position of each of the terminal devices, a plurality of movement destination position candidates of each of the mobile wireless station devices of which communication with the terminal device satisfies a required quality, and from among a plurality of the movement destination position candidates, selects, as a movement destination position for movement control, a movement destination position candidate having a minimum sum of movement costs for movement from a home position to a movement destination for the mobile wireless station device or a movement destination position candidate for which a maximum value of a movement cost for movement from the home position to the movement destination becomes minimum for one or more mobile wireless station devices.

Abstract: Provided is a wireless communication system including: one or more mobile wireless station devices that communicate with one or more terminal devices; and a control device, in which the control device calculates, on the basis of a prediction value of a position of each of the terminal devices, a movement destination position candidate of each of the mobile wireless station devices of which communication with the terminal device satisfies a required quality for each of a plurality of movements, and selects, as a combination of movement destination positions for movement control, a combination that minimizes a sum of movement costs for the plurality of movements from an original position of each of the mobile wireless station devices from among a plurality of the combinations of the movement destination position candidates in the plurality of movements.

Abstract: Provided is a wireless communication system including a plurality of base station devices, in which the base station device includes: a management unit configured to manage information regarding connection with a terminal device by using a blockchain shared by the plurality of base station devices; an acquisition unit configured to acquire, from wireless signals broadcast by other base station devices, information of one or more first base station devices in a vicinity of the base station device among the plurality of base station devices; an extraction unit configured to extract, from ledger information of the blockchain, information of one or more second base station devices, among the plurality of base station devices, from or to which the terminal device is likely to transition to or from the first base station device; and a determination unit configured to acquire connection conditions of the first base station device and the second base station device from the ledger information of the blockchain, and d

Abstract: A wireless communication system that performs connection control using a blockchain includes a base station apparatus and a terminal device that makes a contract for connection to the base station apparatus, in which the base station apparatus calculates a predicted value of communication quality providable to the terminal device on the basis of information obtained by measurement for the terminal device, and presents the predicted value to the terminal device.

Abstract: A communication system includes a terminal that communicates with a base station wirelessly; and a control device, in which the terminal includes a transmitter that transmits information on a location of the terminal, and the control device includes a processor; and a memory that includes instructions, which when executed, cause the processor to execute the following steps: acquiring the information on the location of the terminal, predicting a future location of the terminal based on the information on the location of the terminal and determining whether the terminal is to enter a dead zone by comparing the future position with the dead zone, and executing control for switching a connection destination of the terminal when the determining determines that the terminal is to enter the dead zone.

Abstract: In a wireless communication system including one or more base station devices, which communicate with one or more terminal devices, and a control apparatus, the control apparatus includes a terminal cluster calculation unit that performs clustering on a plurality of terminal devices and divides the plurality of terminal devices into a plurality of clusters, and a connection control unit that generates a plurality of combination patterns in which the base station device to be a connection destination of the terminal devices is allocated to each cluster, calculates an evaluation index value of each combination pattern, selects a combination pattern having a best evaluation index value, and performs control for connecting the terminal devices to the base station device based on the selected combination pattern.

Abstract: In a wireless communication system including one or more base station devices that communicate with one or more terminal devices and a control apparatus, the control apparatus includes: a placement calculation unit that calculates a plurality of placement patterns in which a plurality of base station devices is placed in a target area; and a placement control unit that calculates, for each placement pattern, an evaluation index value based on a communication request of each terminal device, selects a placement pattern having a best evaluation index value, and performs placement control of the base station devices based on the selected placement pattern.

Abstract: A station placement design device for designing arrangement of a base station and a reflector for constructing a radio area, the station placement design device including a processor that executes arranging terminal positions and candidate positions for an installation position of the base station or the reflector in the radio area; calculating received power between the terminal position and the candidate positions and received power between the candidate positions; selecting a candidate position for the base station from among the candidate positions; selecting, if there is a terminal position that is unable to be accommodated by the candidate position for the base station, a candidate position for the reflector capable of accommodating the terminal position; and determining arrangement of the base station and the reflector in which a cost of the radio area is minimized.

Abstract: In order to improve utilization efficiency of a wireless base station having high communication quality and smooth a difference in communication quality between wireless terminals, in a wireless communication method, a wireless base station performs setting processing of setting a threshold for determining a congestion degree of the wireless base station on a basis of an actual value of past communication, determination processing of determining a congestion degree of the wireless base station using the threshold, and change processing of changing a connection condition of the wireless base station on a basis of a congestion degree of the wireless base station.

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 mobile terminal apparatus includes a receiver that receives, from a base station apparatus, information on a high-speed communication area in which a received power intensity of the mobile terminal apparatus is set to a predetermined value or more and data is able to be transmitted at a predetermined transmission rate or more; a processor that determines whether transmission data transmitted by the mobile terminal apparatus is able to be transmitted within a range of the high-speed communication area, based on moving route information of the mobile terminal apparatus; and a transmitter that transmits the transmission data within the range of the high-speed communication area when the transmission data is able to be transmitted within the range of the high-speed communication area.

Abstract: A specific signal in a radio communication system includes at least one of a synchronization signal and a reference signal. A first radio communication system performing radio communication in a first cell generates the specific signal based on a first seed and uses a first resource mapping pattern as a resource mapping pattern of the specific signal. A second radio communication system performing radio communication in a second cell that is adjacent to the first cell generates the specific signal based on a second seed and uses a second resource mapping pattern as a resource mapping pattern of the specific signal. When the first resource mapping pattern is identical to the second resource mapping pattern, the first seed and the second seed are set to be different from each other through sequence seed control.

Abstract: Provided is a wireless communication system provided with a base station and a plurality of terminals and operated by a licensed band, wherein the base station allocates, to the plurality of terminals, a radio resource for transmission that allows overlapping between the plurality of terminals, and all or some of the plurality of terminals execute listen before talk (LBT) and then perform transmission using the allocated radio resource.