The present invention discloses a GPS system that can operate in different modes
depending on the network facilities and bandwidth available, the GPS information
that can be acquired, or user or system requirements. The modes comprise standalone
mode, where a mobile communications device computes the position of the device,
an autonomous mode, where the mobile communications device transmits the computed
position to a server, application, or PSAP in a communications network, a network
aided mode, where the network aides the mobile communications device in determining
the position of the device, a network based mode, and other modes.
