Call data collected from the switch at a Mobile Telephone Switching Office is combined with location information of a mobile unit to generate information reports concerning the electromagnetic coverage of a geographic region. The collection of call data from the switch permits consideration of uplink...http://www.google.com.hk/patents/US7099669?utm_source=gb-gplus-share專利 US7099669 - Method and system for optimizing performance of a mobile communications system
