Patent ID: 7050786

Claim:
A wireless radio communications system that includes at least one communications tower and a mobile unit, the system comprising: a mobile unit configured to emit signals representing a plurality of three-digit codes, a first one of the plurality indicating a request for emergency services and a second one of the plurality indicating a request for location-based non-emergency commercial services; a communications tower receiver associated with a communications tower, the communications tower receiver configured to receive the signals and decode the plurality of three-digit codes, including both the first one indicating a request for emergency services and the second one indicating a request for location-based non-emergency commercial services, the communications tower receiver further configured to perform a location measurement responsive to receipt of any one of the first and second codes, the location measurement including issuing a wireless chirp-on-demand command to the mobile unit, the wireless chirp-on-demand command instructing the mobile unit to transmit a chirp signal; a location receiver operatively connected to the at least one communication tower configured to receive the chirp signal from the mobile unit and determine a location calculation of the mobile unit, the system taking different action with said determined location calculation depending on which one of the first and second codes was transmitted from the mobile unit.