Patent ID: 6690322
Filing Date: 2004-02-10
Classification: G01S

Abstract:
A wireless communications terminal comprising:a plurality of searching means, each for searching at least one corresponding external signal source, which outputs a signal usable in determining a position of the wireless communications terminal, and for outputting search information about the at least one corresponding external signal source, which is obtained through the searching of the at least one corresponding external signal source, wherein the plurality of searching means includes: a first searching means for searching at least one GPS satellite as the at least one corresponding external signal source; and a second searching means for searching at least one base station as the at least one corresponding external signal source; a wireless telephone transceiver means for performing wireless telephone communication with a corresponding one of the at least one base station; an outputting means for outputting positional information of the wireless communications system; and a control means for controlling the plurality of searching means, the wireless telephone transceiver means and the outputting means, wherein: the control means receives each search information from each searching means and transmits each search information to an external location information server through the wireless telephone transceiver means, wherein the external location information server is capable of generating a plurality of position measurement results, each of which indicates the position of the wireless communications terminal, based on the search information of at least one of the plurality of searching means and is also capable of transmitting each of the position measurement results; the control means receives a first one of the position measurement results, which is transmitted from the external location information server, through the wireless telephone transceiver means and determines whether a predetermined condition is satisfied; and when the control means determines that the predetermined condition is satisfied, the control means receives a second one of the position measurement results, which is transmitted from the external location information server, through the wireless telephone transceiver means and outputs the second one of the position measurement results to the outputting means, so that the outputting means outputs the second one of the position measurement results as the positional information of the wireless communications terminal.