| 摘要 |
A Global Positioning System (GPS) system comprises a user end, a mobile terminal, a positioning server, a GPS application server, and a base station network. The mobile terminal has a GPS receiver to receive GPS information from a plurality of GPS satellites. The positioning server is coupled to the user end through the network. The GPS application server is coupled to the network for communicating with the positioning server, and has a GPS receiver to receive GPS information from GPS satellites so as to calculate a position of the GPS application server. The geographic position of the GPS application server is known, and GPS assistant information is determined based on the calculated position and the geographic position of the GPS application server. The base station network communicates with the mobile terminal to obtain the GPS information of the mobile terminal and locate the mobile terminal based on the GPS information of the mobile terminal and the GPS assistant information.
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