POSITIONING SYSTEM AND MOBILE COMMUNICATION DEVICE

摘要

A mobile communication device that can communicate with a center station by using a PHS, is mounted on a vehicle, and includes a vibration detection unit. When the device is set in a theft search mode and the vehicle movement is detected by the vibration detection unit, the device measures the electric field intensity of a base station nearby and sends the result of measurement to the center station that manages vehicles. Therefore, the system can detect that a vehicle has been stolen and track and locate the moving position of the vehicle.