A system and method for tracing a location of a mobile terminal involves having the mobile terminal transmit a predetermined signal including discrimination information with a predetermined interval. A plurality of base stations calculate distances from the mobile terminal based on a reception time for...http://www.google.com.hk/patents/US7398092?utm_source=gb-gplus-share專利 US7398092 - Location tracing system for mobile telecommunication terminal and method thereof
