Patent ID: 11867821
Assignee: SOFTBANK CORP.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 7:
8. A system comprising:
a radio relay apparatus in which a relay station is mounted on a drone, the relay station relaying a radio communication between a fixed base station of a mobile communication network and a terminal apparatus; and
an information processing apparatus for specifying a position of a terminal apparatus for mobile communication, wherein the radio relay apparatus comprises:
a directional antenna having directivity in a direction toward a ground;
a GNSS reception apparatus for receiving GNSS signals from artificial satellites;
a communication apparatus for communicating with an information processing apparatus that is provided in the mobile communication network or another communication network and specifies a position of a terminal apparatus for mobile communication; and
a control apparatus for controlling to transmit radio waves from the directional antenna toward the ground direction, and transmit position information on the radio relay apparatus obtained based on the GNSS signal received by the GNSS reception apparatus, to the information processing apparatus, while flying in an upper airspace above a target area on the ground,
wherein the information processing apparatus comprises:
an information receiving section for receiving position information on a radio relay apparatus obtained based on the GNSS signals received by the GNSS reception apparatus, from a radio relay apparatus, with respect to a flight time period during which the radio relay apparatus flies in an upper airspace above a target area on a ground, the radio relay apparatus comprising a directional antenna with directivity in a direction toward the ground, a GNSS reception apparatus for receiving GNSS signals from artificial satellites and a communication apparatus for communicating with the information processing apparatus, and receiving reception measurement information including a measurement result of a reception power or a reception quality from the terminal apparatus that measures the reception power or the reception quality of radio waves transmitted toward the ground from the directional antenna of the radio relay apparatus; and,
a position estimating section for estimating the position on the terminal apparatus in the target area based on the position information on the radio relay apparatus and the reception measurement information.