Patent ID: 8693978

Claim:
A method of wireless communications, comprising: receiving a ranging request message from a mobile station (MS) with an emergency call identification, the ranging request message comprising a ranging code allocated for initial, periodic, bandwidth request, or handover ranging located in an emergency call ranging region of an uplink subframe utilized only for emergency calls; performing a ranging procedure for an emergency call associated with the emergency call identification faster than a ranging procedure for a non-emergency call by applying both of allocating multiple Transmission Opportunities (TOs) to the emergency call ranging region within at least one ranging frame, and increasing a transmission power for the ranging procedure of the emergency call by an emergency weight factor over the ranging procedure of the non-emergency call; setting up the emergency call; and determining a location of the emergency call based on Global Positioning System (GPS) location information received from the MS; wherein a number of TOs allocated in the emergency call ranging region is increased for a subsequent ranging frame based on a ratio of a number of detected ranging codes in the emergency call ranging region of the at least one ranging frame to the number of allocated TOs exceeding a predetermined threshold.