3[3]Terminal Equipment to Mobile Station (TE-MS) multiplexer protocol.3G TS 27.010 version 2.0.0 ,ETSI, 1999
4Okatan A,Salih A.Micro-controller based vehicle tracing system via use of GPS and GSM[C].Proceedings of International conference on recent advances in space teclmologies,2003:20-25.
5Kan K K H,Chan S K C.A dual-channel location estimation system for providing location services based on the GPS and GSM networks[C].Proceedings of International conference on advances information networking and applications,2003:32-34.
6Cohn Hamling.An Overview of GSM Data Services[J].The Institution of Electrical Engineers,1995(3):26-31.
7Okatan A,Salih A.Micro-controller based vehicle tracing system via use of GPS and GSM[C].Proceedings of International conference on recent advances in space teclmologies, 2003:20-25