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

Claim 13:
14. A method for specifying a position of a terminal apparatus for mobile communication, the method comprising:
flying a radio relay apparatus having a directional antenna with directivity in a direction toward a ground and a GNSS reception apparatus for receiving GNSS signals from artificial satellites in an upper airspace above a target area on the ground;
receiving position information on the radio relay apparatus obtained based on the GNSS signals received by the GNSS reception apparatus, from the radio relay 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 from the directional antenna of the radio relay apparatus toward the ground, with respect to a flight time period during which the radio relay apparatus flies in the upper airspace above the target area on the ground; and estimating the position of the terminal apparatus in the target area based on the position information on the radio relay apparatus and the reception measurement information.