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

摘要

A position estimation device including: a provisional position setting unit which sets current position information indicating an estimated current position of a wireless terminal; a distance estimation unit which estimates, using receiving strengths of signals received from plural wireless stations, distance information indicating distances from the plural wireless stations to the wireless terminal; a possible area calculation unit which calculates, using the distance information and map information indicating a spatial structure, an area in the spatial structure which can maintain the distances indicated in the distance information, as a possible area in the spatial structure in which the wireless terminal is likely to be present; and a correction unit which corrects the current position indicated in the current position information to a position within the possible area when the current position is outside the possible area.

主权项

1. A position estimation device comprising:
a setting unit configured to set current position information indicating an estimated current position of a wireless terminal, the wireless terminal including a mobile station; an estimation unit configured to estimate, using receiving strengths of signals received from plural wireless stations including mobile stations, distance information indicating distances from the plural wireless stations including the mobile stations to the wireless terminal; a calculation unit configured to calculate, using the distance information and map information indicating a spatial structure, a geometric area in the spatial structure in which the wireless terminal is likely to be present, the geometric area being movable based on movement of the wireless terminal within a range in the spatial structure in which the wireless terminal is movable, the spatial structure including at least a layout of a building, and the geometric area in the spatial structure including straight lines each having vertices indicating one of the distances from the plural wireless stations to the wireless terminal; and a correction unit configured to correct the current position indicated in the current position information to a position within a possible area when the current position is outside the possible area.