MOBILE DEVICE LOCATION SYSTEMS AND METHOD

摘要

This invention is generally concerned with computer systems, methods and computer program codes for determining a location of a mobile communications device moving along a known path, and more particularly for adding location information to "drive" test data captured from a mobile device. Embodiments of the invention are particularly useful for "drive" testing on high-speed trains. A method of locating a mobile communications device, in.particular on a known path, the mobile device communicating with a mobile communications network infrastructure including a plurality of base stations, communications between the mobile device and the base station to which it is attached having a timing advance to compensate for a time taken for a radio signal to reach the base station from the mobile device, the method comprising: reading a time ordered sequence of messages captured from said communications between the mobile device and said network infrastructure; reading timing advance information from said captured messages; identifying a step change in timing advance using said timing advance information; and determining a location of said mobile devices, in particular on said path, at a time of said step change.