Patent ID: 8154441

Claim:
An electronic device, the electronic device in communication with one or more monitoring electronic devices via a location server and a plurality of base stations, the electronic device comprising: a battery; a memory system; at least one processor; and one or more programs stored in the memory system to be executed by the at least one processor, the one or more programs comprising: a parameter setting module operable to receive a standard command message for acquiring position information of the electronic device, and to receive a user-defined alert power level; a monitoring module operable to determine whether the electronic device has received a message, and whether information in the received message is the same as information defined in the standard command message; an assisted global positioning system (A-GPS) module operable to obtain the position information of the electronic device by the location server and the plurality of base stations, in response that the information in the received message is the same as the information defined in the standard command message; and a message transmission module operable to transmit a reply message which comprises the position information and time for acquiring the position information of the electronic device to a corresponding monitoring electronic device, and to automatically transmit a message which comprises current battery power level and the position information of the electronic device to the corresponding monitoring electronic device, in response that current battery power level of the electronic device reaches or falls below the alert power level.