Softbank Corporation

Hapsmobile Inc.

Jutatsu Sai

Kiyoshi Kimura

Ryoji Hirai

Tatsushi Tsutsui

Chiaki Inui

Hirai Ryoji

A system having flying objects, each of which includes: a beacon signal transmission unit for wirelessly transmitting a beacon signal including rank information representing the flying object is at, a first rank when wirelessly connected with a gateway, a second rank when wirelessly connected with a flying object at the first rank, and a third rank when wirelessly connected with a flying object at the second rank; a flying object identification unit for identifying, when wirelessly connected with any flying object among the flying objects, flying objects from which strength of a radio wave received is stronger than threshold; and a flying object determination unit for determining a flying object with which wireless connection is to be performed, from the identified flying objects and based on the strength of radio wave received from each of the flying objects and a rank of the each of the flying objects, is provided.

System, control apparatus, computer readable storage medium, and control method

Provided is a communication control apparatus for controlling communication of a flying body for forming a cell by irradiating a beam toward the ground to provide wireless communication service for a user terminal in the cell. The communication control apparatus comprises: a determination unit for determining a user terminal of an offload target to be offloaded and a cell of an offload destination, based on a neighbor cell list of the cell of the flying body, a frequency priority list in which priorities are each associated with each of a plurality of frequencies, a radio resource usage rate of each of the plurality of user terminals that exists in the cell of the flying body, and an MCS of each of the plurality of user terminals; and a control unit for causing the user terminal of the offload target to be handed over to the cell of the offload destination.

Communication control device, communication system, computer-readable storage medium and communication control method

A communication management device provided in a flight vehicle that communicates with a base station management device that manages a plurality of base stations, includes: a first communication unit that transmits and receives control signals of an airframe of the flight vehicle or flight information of the flight vehicle to and from the base station management device; a second communication unit that provides communications among the plurality of wireless terminals as a base station; an acquisition unit that acquires anomaly information indicating that an anomaly of the first communication unit or an anomaly of a flight state of the flight vehicle has occurred, and an anomaly reporting unit that transmits the anomaly information to the base station management device via the second communication unit when the anomaly information is acquired by the acquisition unit.

Communication management device, communication management system, communication management method, and communication management program

There is provided a wireless communication device, comprising: a plurality of radio units including a first radio unit and a second radio unit; and a control unit configured to control the plurality of radio units to form a multi-cell on the ground, wherein the control unit has a removal processing performing unit configured to perform, based on a first reception radio wave in which the first radio unit received a first transmission radio wave which includes a first signal transmitted by a first user terminal, and a second reception radio wave in which the second radio unit received a second transmission radio wave which includes a second signal transmitted by a second user terminal, removal processing to remove a component of the first transmission radio wave contained as an interference wave in the second reception radio wave.

Wireless communication device, system, computer-readable storage medium, and control method

Provided is a base station device which is mounted to a flight vehicle and forms a multi-cell including a plurality of cells on a ground to provide a wireless communication service to a user terminal in the multi-cell, the base station device including a location information acquisition unit which acquires location information of a user terminal present in the multi-cell, a flight vehicle associated information acquisition unit which acquires flight vehicle associated information, an interference estimation unit which estimates an interfered user terminal having a chance of experiencing an interference from a cell other than a cell in which the user terminal is present among a plurality of user terminals and an interference amount, an MCS decision unit which decides an MCS of an uplink to be assigned to the interfered user terminal, and an MCS notification unit which notifies the interfered user terminal of the MCS.

Base station device, program, system, and control method

Provided is a base station device that is mounted in a flying object, forms a communication area on a ground, establishes a communication connection with a user terminal in the communication area, and provides a radio communication service to the user terminal, and comprises a connection control unit that, when the number of connected terminals is larger than a first threshold, performs admission control in response to a connection request received from the user terminal, and when the number of connected terminals is smaller than the first threshold and larger than a second threshold smaller than the first threshold, periodically selects a connection allowable group, executes a connection establishment process in response to a connection request from a user terminal included in the connection allowable group, and executes a request rejection process that rejects a connection request from a user terminal not included in the connection allowable group.

Base station device, program, control device, and control method

Provided is a base station device mounted on an aircraft and configured to form a communication area on the ground to provide wireless communication service for a user terminal in the communication area. The base station device comprises a CPU; a determination unit configured to determine whether to execute congestion control in the wireless communication service, based on a use status of a CPU stack message queue of the CPU; and a congestion control execution unit that executes the congestion control when the determination unit determines to execute the congestion control.

Base station device, program, control device and control method

Provided is a control device that controls flight vehicles having an antenna for forming a cell on the ground to provide a wireless communication service to a user terminal in the cell. The control device includes a replacement control unit that controls replacement of a first flight vehicle covering an object area on the ground by means of a cell with a second flight vehicle. The replacement control unit controls the first flight vehicle and the second flight vehicle such that the second flight vehicle moves to a location corresponding to the location of the first flight vehicle, the second flight vehicle and the first flight vehicle start providing a wireless communication service to a user terminal by Coordinated Multiple Point transmission/reception (CoMP), and then the first flight vehicle stops forming its cell.

Control device, program, control method, and flight vehicle

Provided is a control device for controlling flight vehicles, including a replacement control unit for controlling replacement of a first flight vehicle covering a target area on the ground by a cell in a first frequency band with a second flight vehicle, in which the replacement control unit is for controlling the replacement such that, after the second flight vehicle moves to a location corresponding to a location of the first flight vehicle, the first flight vehicle continues using one part of a frequency band in the first frequency band and stops using a remaining part of the frequency band, and also the second flight vehicle forms a cell in a frequency band excluding the one part of the frequency band but including the remaining part of the frequency band, which overlaps with the cell formed by the first flight vehicle, and the first flight vehicle stops forming the cell.

Growing community of inventors

Kanagawa, Japan

Jutatsu Sai