Positioning system, positioning server, base station and terminal location estimation method

DETAILED DESCRIPTION An object of the present invention is to provide a positioning system, a positioning server, a base station and a terminal location estimation method capable of accurately estimating the location of a mobile terminal when providing the information services according to the location of the mobile terminal in a radio communication system.
According to the first aspect of the present invention, a positioning system having: a positioning server for estimating a location of a mobile terminal in a service area comprised of a plurality of preset areas; and a plurality of base stations connectable to the above described terminal via radio links and connected to the above described positioning server via a network, wherein: each of the above described base stations has receiving means for receiving a signal transmitted from the above described terminal, measuring means for measuring a radio wave propagation environment between the above described terminal and the base station from the signal received by the above described receiving means, and means for sending the measurement result of the above described measuring means to the above described positioning server; and the above described positioning server has storing means for storing a estimation result of the radio wave propagation environment between each of the above described preset areas and each of the above described base stations, and estimating means for estimating the location of the above described terminal by checking the above described estimation results stored in the above described storing means against the above described measurement results from the above described base stations.
The above described estimation results contain reception levels and impulse responses in the above described preset areas of radio waves transmitted from the above described base stations.
Or the above described estimation results contain reception levels and delay spreads in the above described preset areas of radio waves transmitted from the above described base stations