Patent ID: 6963749

Claim:
A radio communication terminal unit capable of communicating with a location information server and a base station, the unit comprising: telephone radio communication means; location information acquisition means for acquiring location-related information necessary for specifying a location of the unit, the location-related information includes GPS satellite information regarding the GPS satellites; and control means for transmitting, after transmitting base station information to the location information server to acquire an approximate location of the unit from the location information server when operated to start specifying a location, the location-related information to the location information server from the telephone radio communication means, wherein the control means extracts a part of the GPS satellite information transmitted from the location information server and received by the telephone radio communication means, and transmits the extracted part to the location information server from the telephone radio communication means, and wherein the part includes information that satisfies a transmission condition corresponding to a threshold value of power of a GPS satellite wave, the threshold value being set in accordance with an environment surrounding the approximate location of the unit.