Position estimation device, position estimation method, program and integrated circuit

摘要

A position estimation device which includes: a distance estimation unit which estimates, using a receiving strength of a signal received by a wireless terminal from each of a plurality of base stations communicating with the wireless terminal, distance information indicating a distance from the base station to the wireless terminal; a position estimation unit which estimates a first position to be a current position of the wireless terminal using base station information indicating a position of the base station and the estimated distance information; and a correction unit which corrects the distance information based on an acceleration and a direction of the wireless terminal, the estimated first position, and the base station information. The position estimation unit further estimates a second position to be a current position of the wireless terminal using the base station information and the corrected distance information.

主权项

1. A position estimation device which estimates a current position of a wireless terminal, the device comprising:
a distance estimation unit configured to estimate, using a receiving strength of a signal received by the wireless terminal from each of a plurality of base stations communicating with the wireless terminal, distance information indicating a distance from at least one base station of the plurality of base stations to the wireless terminal; a position estimation unit configured to estimate a first position to be the current position of the wireless terminal using base station information indicating a position of the at least one base station and the estimated distance information; and a correction unit configured to correct the distance information by: obtaining, using terminal posture information that is obtained by an acceleration sensor and a direction sensor of the wireless terminal and indicates an orientation of a surface of the wireless terminal at the estimated first position, surface orientation information on the orientation of the surface of the wireless terminal at the estimated first position as seen from the position of the at least one base station, the surface orientation information indicating which side of the wireless terminal faces the at least one base station; and correcting the distance from the at least one base station to the wireless terminal based on the obtained surface orientation information, wherein the position estimation unit is further configured to estimate a second position to be the current position of the wireless terminal using the base station information and the corrected distance information.