Patent ID: 7277049

Claim:
A method of providing satellite positioning assistance information from a first mobile communication device to at least a second mobile communication device, the first mobile communication device having current satellite positioning assistance information, the method comprising: establishing an asynchronous radio link directly between the first and second mobile communication devices; requesting the current satellite positioning assistance information from the first mobile communication device at the second mobile communication device; receiving the current satellite positioning assistance information from the first mobile communication device to the second mobile communication device over the asynchronous radio link; and performing a satellite positioning location determination at satellite positioning receiver of the second mobile communication device using the current satellite positioning assistance information; wherein performing satellite positioning location determination is commenced prior to receiving the current satellite positioning assistance information, and wherein, while commencing the satellite positioning location determination before receiving the current satellite positioning assistance information, the second mobile communication device periodically checks an asynchronous radio channel to detect the first mobile communication device transmitting the current satellite positioning assistance information.