Abstract: A wireless communication system includes a wireless communication device that is capable of forming a plurality of beams each facing a different direction, and a communication control device that controls the wireless communication device. The communication control device includes a processor that executes a process including acquiring distribution information that indicates a distribution of terminal devices that perform wireless communication with the wireless communication device, deciding, based on the acquired distribution information, allocation time that is allocated to each of the plurality of beams, and generating beam time information that indicates the decided allocation time for each beam, and a transmitter that transmits the beam time information generated by the processor to the wireless communication device.

Abstract: A connection control device includes: a memory; and a processor coupled to the memory. The processor executes a process including: acquiring information on reception power in a plurality of terminal devices received from each of a plurality of radio units; aggregating an estimated communication load in each of the radio units by using the information on the reception power; determining a radio unit that belongs to each of a plurality of cells on a basis of an index indicating variance in a processing load for each cell associated with the estimated communication load in each of the radio units in the respective cells; and generating connection control information that allows a baseband processing device that manages a cell to be connected to the radio unit that belongs to the cell.

Abstract: A communication system including a plurality of radio base stations and a control apparatus coupled to the plurality of radio base stations, the control apparatus comprising a first memory and a first processor configured to determine at least one transmission pattern that indicates a combination of transmission states for each of the plurality of radio base stations at a specified timing, and transmit, to each of the plurality of radio base stations, control information including information that indicates an allocation of radio resources determined based on the at least one of transmission patterns, wherein each of the plurality of radio base stations are comprises a second memory and a second processor configured to execute, based on the control information, transmission control on a terminal that communicates with each of the plurality of radio base stations.

Abstract: A base station includes a processor and a plurality of antennas that transmit, to each of terminals, first and second wireless signals to form first and second beams, respectively, and receive, from each terminal, a third wireless signal including feedback information of the terminal in response to the second wireless signal. The processor selects, from among the terminals, based on the feedback information and a correlation value between the first beam and the second beam, a terminal to which the second beam is optimum, as a first terminal that performs communication via the first beam, or selects a terminal as a second terminal that performs communication via the second beam while communication via the first beam is performed in parallel. The plurality of antennas transmit a fourth wireless signal including data to each terminal apparatus to form the first beam or the second beam.

Abstract: A transmission controlling apparatus includes: a memory; a transmitting and receiving interface connected to a plurality of wireless stations each of which wirelessly transmits a signal; and a processor connected to the memory and to the transmitting and receiving interface. The processor executes a process including: calculating, for each of the wireless stations, an index indicating a magnitude of interference suffered by the signal wirelessly transmitted from the wireless station, the interference being caused by the signals wirelessly transmitted from one or more other wireless stations; determining a resource to be allocated to each of the plurality of wireless stations in accordance with the index calculated for each of the wireless stations; and transmitting transmission data to each of the plurality of wireless stations by using the determined resource.

Abstract: A base station including: a memory, a processor coupled to the memory and the processor configured to: determine, less frequently than transmission opportunities, a specified number of transmission weight patterns based on channel characteristics between the base station and a plurality of wireless terminals, each of the transmission weight patterns indicating transmission weights used when the base station transmits a wireless signal to target wireless terminals selected from the plurality of the wireless terminals in one of the transmission opportunities, select, for each transmission opportunity of the transmission opportunities, a transmission weight pattern from the specified number of the transmission weight patterns based on channel characteristics between the base station and the target wireless terminals of the transmission opportunity, and transmit the wireless signal based on the selected transmission weight pattern.

Abstract: A controller controlling radio transmission of a plurality of radio devices in a radio communication system in which each of the plurality of radio devices constituting a cluster transmits data with a same frequency and with transmission weights each of the plurality of radio devices to a terminal device belonging to the cluster, the controller includes, an acquisition unit configured to acquire radio propagation characteristics between the terminal device and the each of plurality of radio devices, a determination unit configured to determine radio a plurality of devices constituting the cluster to which the terminal device belongs, based on the acquired radio propagation characteristics, and a control unit configured to determine transmission weights of each of the plurality of radio devices constituting the cluster, based on the radio propagation characteristics of each of the plurality of radio devices constituting the cluster.

Abstract: A base station includes a receiving unit that receives a report of a reception power from a user equipment, and a selecting unit that calculates a first throughput and a second throughput by using the reception power, the first throughput being a throughput when coordinated communication is not performed and a single user equipment occupies an entire band, the second throughput being a throughput when the coordinated communication is performed and the single user equipment occupies the entire band, and selects a coordination candidate cell based on the first throughput, the second throughput, a first resource allocation rate and a second resource allocation rate, the first resource allocation rate being a resource allocation rate when the coordinated communication is not performed, the second resource allocation rate being a resource allocation rate when the coordinated communication is performed.

Abstract: A control device including: a processor configured to: receive first and second quality information indicating qualities of wireless signals transmitted from a first and a second base stations, determine a first and a second ratios based on the first and the second quality information, the first ratio being a ratio with which the base stations perform a coordinated transmission, the second ratio being a ratio with which the first base station performs an uncoordinated transmission, and determine a coordination pattern based on the ratios, the coordination pattern indicating a first wireless resource and a second wireless resource in a specified wireless resource, the first and the second wireless resources being allocated to the coordinated transmission and the uncoordinated transmission, the coordinated pattern being applied to a specified period including a plurality of units of period each being a unit of period for wireless transmission in a wireless communication system.

Abstract: A transmission controlling apparatus includes: a memory; a transmitting and receiving interface connected to a plurality of wireless stations each of which wirelessly transmits a signal; and a processor connected to the memory and to the transmitting and receiving interface. The processor executes a process including: calculating, for each of the wireless stations, an index indicating a magnitude of interference suffered by the signal wirelessly transmitted from the wireless station, the interference being caused by the signals wirelessly transmitted from one or more other wireless stations; determining a resource to be allocated to each of the plurality of wireless stations in accordance with the index calculated for each of the wireless stations; and transmitting transmission data to each of the plurality of wireless stations by using the determined resource.

Abstract: A radio communications apparatus transmits to a communications control apparatus, route information indicating a position and a predicted route of the radio communications apparatus. For each frequency available to the radio communications apparatus at the position of the radio communications apparatus, the communications control apparatus calculates a predicted time for the frequency to become unavailable to the radio communications apparatus, based on the route information and correspondence information of the position of the radio communications apparatus and the frequencies available to the radio communications apparatus; selects a frequency from among the frequencies available to the radio communications apparatus at the position of the radio communications apparatus, based on the calculated predicted time; and transmits to the radio communications apparatus, frequency information indicating the selected frequency.

Abstract: A controller controlling radio transmission of a plurality of radio devices in a radio communication system in which each of the plurality of radio devices constituting a cluster transmits data with a same frequency and with transmission weights each of the plurality of radio devices to a terminal device belonging to the cluster, the controller includes, an acquisition unit configured to acquire radio propagation characteristics between the terminal device and the each of plurality of radio devices, a determination unit configured to determine radio a plurality of devices constituting the cluster to which the terminal device belongs, based on the acquired radio propagation characteristics, and a control unit configured to determine transmission weights of each of the plurality of radio devices constituting the cluster, based on the radio propagation characteristics of each of the plurality of radio devices constituting the cluster.

Abstract: A communications apparatus includes a processor configured to identify positions where wireless communication with a mobile communications apparatus is possible, the positions being included in a coverage area of the communications apparatus; and obtain from a database that is inaccessible to the mobile communications apparatus, frequency information that indicates frequencies that can be used for the wireless communication at the identified positions; and an announcing unit configured to announce in the coverage area and by a radio signal, correspondence information that is based on the frequency information obtained by the obtaining unit and that correlates the positions and the frequencies that can be used.

Abstract: A base station including: a memory, a processor coupled to the memory and the processor configured to: determine, less frequently than transmission opportunities, a specified number of transmission weight patterns based on channel characteristics between the base station and a plurality of wireless terminals, each of the transmission weight patterns indicating transmission weights used when the base station transmits a wireless signal to target wireless terminals selected from the plurality of the wireless terminals in one of the transmission opportunities, select, for each transmission opportunity of the transmission opportunities, a transmission weight pattern from the specified number of the transmission weight patterns based on channel characteristics between the base station and the target wireless terminals of the transmission opportunity, and transmit the wireless signal based on the selected transmission weight pattern.

Abstract: A communication system including a plurality of radio base stations and a control apparatus coupled to the plurality of radio base stations, the control apparatus comprising a first memory and a first processor configured to determine at least one transmission pattern that indicates a combination of transmission states for each of the plurality of radio base stations at a specified timing, and transmit, to each of the plurality of radio base stations, control information including information that indicates an allocation of radio resources determined based on the at least one of transmission patterns, wherein each of the plurality of radio base stations are comprises a second memory and a second processor configured to execute, based on the control information, transmission control on a terminal that communicates with each of the plurality of radio base stations.

Abstract: A control device including: a processor configured to: receive first and second quality information indicating qualities of wireless signals transmitted from a first and a second base stations, determine a first and a second ratios based on the first and the second quality information, the first ratio being a ratio with which the base stations perform a coordinated transmission, the second ratio being a ratio with which the first base station performs an uncoordinated transmission, and determine a coordination pattern based on the ratios, the coordination pattern indicating a first wireless resource and a second wireless resource in a specified wireless resource, the first and the second wireless resources being allocated to the coordinated transmission and the uncoordinated transmission, the coordinated pattern being applied to a specified period including a plurality of units of period each being a unit of period for wireless transmission in a wireless communication system.

Abstract: A wireless communication method including: acquiring, by a wireless terminal configured to asynchronously transmit a wireless signal to a first base station in a first wireless communication system, first information relating to a stop period during which a synchronous wireless communication between two apparatus is stopped in a second wireless communication system that is interfered by the wireless signal asynchronously transmitted from the wireless terminal, and adjusting, by the wireless terminal, a timing of transmitting the wireless signal so as to suppress an overflow of the wireless signal into a period subsequent to the stop period, based on the first information.

Abstract: A base station includes a receiving unit that receives a report of a reception power from a user equipment, and a selecting unit that calculates a first throughput and a second throughput by using the reception power, the first throughput being a throughput when coordinated communication is not performed and a single user equipment occupies an entire band, the second throughput being a throughput when the coordinated communication is performed and the single user equipment occupies the entire band, and selects a coordination candidate cell based on the first throughput, the second throughput, a first resource allocation rate and a second resource allocation rate, the first resource allocation rate being a resource allocation rate when the coordinated communication is not performed, the second resource allocation rate being a resource allocation rate when the coordinated communication is performed.

Abstract: A control device includes a calculating unit and a specifying unit. The calculating unit calculates an estimated interference area of a base station to be installed for a secondary system, based on an installation scheduled position of the base station to be installed, an installation position of a reference base station of the secondary system, and an actually-measured interference area of the reference base station. The specifying unit specifies a channel of a primary system for which a used area does not overlap with the calculated estimated interference area.

Abstract: A radio communications apparatus transmits to a communications control apparatus, route information indicating a position and a predicted route of the radio communications apparatus. For each frequency available to the radio communications apparatus at the position of the radio communications apparatus, the communications control apparatus calculates a predicted time for the frequency to become unavailable to the radio communications apparatus, based on the route information and correspondence information of the position of the radio communications apparatus and the frequencies available to the radio communications apparatus; selects a frequency from among the frequencies available to the radio communications apparatus at the position of the radio communications apparatus, based on the calculated predicted time; and transmits to the radio communications apparatus, frequency information indicating the selected frequency.