Patent ID: 7979208
Filing Date: 2011-07-12
Classification: G01S,H04M

Abstract:
1. A mobile terminal connectable to a position measurement server via a communication network and a proxy server, comprising: a first position calculation module which calculates a position of the mobile terminal based on a Global Positioning System (GPS) signal; a second position calculation module which accesses the position measurement server via the communication network and the proxy server, acquires auxiliary information from the position measurement server, and calculates the position of the mobile terminal based on the acquired auxiliary information and the GPS signal; a timer which starts measurement of a preset time period when the second position calculation module establishes a connection with the proxy server; and a change control module which determines, during the preset time period, whether a transmission disable message is directly received from the position measurement server without intervention of the proxy server and the communication network, and changes control from the second position calculation module to the first position calculation module even before the preset time period elapses when it is determined that the transmission disable message is received.