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

Claim 0:
1. A system for specifying a position of a terminal apparatus for mobile communication, comprising:
a terminal apparatus for mobile communication;
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 the terminal apparatus; and
an information processing apparatus provided in the mobile communication network or another communication network,
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; and
a control apparatus for controlling to transmit radio waves from the directional antenna toward the ground, 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 terminal apparatus comprises:
a reception measurement section for measuring a reception power or a reception quality of the radio waves transmitted from the radio relay apparatus; and
an information transmitting section for transmitting reception measurement information on a measurement result of the reception power or reception quality to the information processing apparatus, and

wherein the information processing apparatus comprises:
an information receiving section for receiving position information on the radio relay apparatus from the radio relay apparatus and receiving the reception measurement information from the terminal apparatus in a flight time period during which the radio relay apparatus flies in the upper airspace above the target area; and
a position estimating section for estimating a position of the terminal apparatus in the target area based on the position information on the radio relay apparatus and the reception measurement information.