Patent ID: 7039419

Claim:
A cell phone position measurement system characterized by comprising: position measurement means for performing position measurement using a satellite; and a cell phone terminal which notifies said position measurement means of a signal received from the satellite and receives a position information service, wherein said cell phone terminal comprises a receiving unit which receives the signal from the satellite, a radio phone unit which notifies said position measurement means via a radio channel and a cell phone network of position measurement data obtained from the signal received by said receiving unit, and a controller which controls said radio phone unit and temporarily interrupts communication via the radio channel in position measurement through said receiving unit, wherein said position measurement system further comprises an analyzer which performs lower layer data transmission between a plurality of base stations constituting the cell phone network, and analyzes radio signal arrival time, and said controller notifies said position measurement system by channel disconnection message communication of position measurement data obtained by said receiving unit when a radio channel communication state at the start of position measurement is a channel-disconnected state, and notifies said position measurement system by channel connection data communication of position measurement data obtained from an analysis result of said analyzer when the radio channel communication state is a voice/data communication state.