Patent ID: 8559915

Claim:
A method of wireless communications by a mobile station (MS), comprising: transmitting a ranging request message containing an emergency call identification provided in a ranging purpose indicator field to set up, with a first base station, an emergency call associated with the emergency call identification; transmitting Global Positioning System (GPS) location information to the first base station for use in determining a location of the emergency call; performing a ranging procedure for the emergency call by sending Code Division Multiple Access ranging codes with higher transmission power in the ranging procedure for the emergency call than in a ranging procedure for a non-emergency call, wherein the ranging procedure for the emergency call is performed faster than the ranging procedure for the non-emergency call; receiving instructions to perform a handover of the emergency call from the first base station to a second base station; and when there are not enough bandwidth resources to handover all existing services, releasing, before the handover, a service different from the emergency call.