Patent ID: 6990351
Filing Date: 2006-01-24
Classification: H04W

Abstract:
1. Equipment for calculating a mobile handset position by using a cellular radio wave, comprising: a signal receiver for receiving a cellular radio wave to generate a reception signal; a position calculation information generator for generating position calculation information necessary for position calculation by using the reception signal; a base station selection unit for selecting base stations available for position calculation according to the position calculation information; a base station number counter for counting the number of base stations selected by the base station selection unit; a position calculation method controller for generating, according to the number of selected base stations, a position calculation method control signal to control the position calculation method; a position calculation unit for calculating, according to the position calculation method specified by the position calculation method control signal, the mobile handset position from the position calculation information and the information on the base stations selected by the base station selection unit; and a position information application unit for using the mobile handset position to provide a user with information, wherein when the position calculation method control signal entered from the position calculation method controller corresponds to three or more base stations available for position calculation, the position calculation unit performs the position calculation based on trilateration; when the position calculation method control signal corresponds to two base stations available for position calculation, the position calculation unit performs the position calculation by using a two-station-based position calculation unit; and when the position calculation method control signal corresponds to one base station available for position calculation, the position calculation unit performs the position calculation by using a one-station-based position calculation unit.