Today's rapidly evolving positioning location technology can be possible to determine the geographical position of mobile phone. This is related to many new services of the next rejloIution mobile communication system It is important to find out what location technology is suitable for operating on GSM network. However a success of service must cancem with the lowest possible cost and minima1 impact on the network infrastructure and subscriber equipment because GSM system were not originally designed for positioning. Thus we present to study of the E-OTD location technology for improving accuracy and service stability.
