Method and controller for selecting between a plurality of different position determination approaches

A method for selecting between a plurality of different position determination approaches for locating a mobile station, said method comprising:

• receiving a location determination request by the mobile station from a network, which includes an approach definition;
• if the approach definition includes an indication to use a mobile station based approach, determining if assistance data has been received by the mobile station from the network;
• if assistance data has not been received, then determining whether the mobile station supports an autonomous position determination approach, and if autonomous mode is supported then performing a location calculation using the autonomous position determination approach;
• if one or more of 1) assistance data has been received, and 2) the mobile station does not support an autonomous position determination approach, then performing a location calculation using a mobile based assisted position determination approach;
• and
• communicating the location determined by the mobile station to the network;
• and
• if the approach definition includes an indication to use a mobile station assisted approach, then providing location measurement information from the mobile station to the network, and performing a location calculation by the network using a mobile station assisted determination approach.

A controller for selecting between a plurality of different position determination approaches for locating a mobile station, when a mobile station based approach in a location determination request is identified, said controller comprising:

• a processor for executing one or more sets of prestored instruction;
• and
• a storage circuit coupled to the processor, said storage circuit including
• prestored instructions for determining whether assistance data from a network has been received by the mobile station;
• if assistance data has not been received, then determining whether the mobile station supports an autonomous position determination approach, and if autonomous mode is supported then performing a location calculation using the autonomous position determination approach;
• if one or more of 1) assistance data has been received, and 2) the mobile station does not support an autonomous position determination approach, then performing a location calculation using a mobile based assisted position determination approach.

A mobile station comprising:

• an antenna;
• a transceiver coupled to the antenna adapted for wirelessly communicating with a network;
• a processor for executing one or more sets of prestored instruction;
• and
• a storage circuit coupled to the processor, said storage circuit including
• prestored intruction for receiving a location determination request,
• a plurality of sets of prestored instructions for performing a location calculation including one or more of prestored instructions for an autonomous position determination approach, prestored instructions for a mobile based assisted position determination approach, and prestored instructions for a mobile station assisted determination approach,
• prestored instructions selecting between a plurality of different position determination approaches including prestored instructions for determining whether assistance data from a network has been received by the mobile station,
• if assistance data has not been received, then determining whether the mobile station supports an autonomous position determination approach, and if autonomous mode is supported then performing a location calculation using the autonomous position determination approach,
• if one or more of 1) assistance data has been received, and 2) the mobile station does not support an autonomous position determination approach, then performing a location calculation using a mobile based assisted position determination approach, and prestored instructions for communicating the location determined by
• the mobile station to the network.