Mobile location by time advance for GSM

A method that employs the time advance for locating the position of mobile phone is proposed. The advantage of the proposed technique is that it can work for the current system, such as GSM, without any change in hardware equipment. In this paper, we first add the software into the mobile phone for detecting the time advance, power intensity and quality factor and so on. Then, these parameters can be used to estimate the position of mobile handset. This raw data will be transmitted to the Operator Maintenance Center (OMC) for further processing and applications. The experimental results show that the proposed method can provide an accuracy position to trace the mobile phone in the GSM (Global system for Mobile).