Patent ID: 7206573

Claim:
In a wireless communication system in which a mobile station engages in a call via air interface communication with a base station, a method comprising: the base station making a determination that the call has been dropped; and responsive to the base station making the determination that the call has been dropped, determining a call-drop location of the mobile station, wherein making the determination that the call in which the mobile station was engaged has been dropped comprises determining, at the base station, that a duration of bad frames received on a reverse traffic channel (RTCH) carrying communications from the mobile station to the base station is greater than a threshold level, wherein the base station determines that no call-drop event has occurred if a duration of good frames are received at the base station from the mobile station within a predefined period of time after receiving the duration of bad frames, wherein the wireless communication system comprises position determining equipment (PDE); and wherein determining the call-drop location comprises the base station sending a position request to the PDE to determine the location of the mobile station, the position request including a mobile identification number (MIN) identifying the mobile station.