Patent ID: 8019355

Claim:
A method of performing a location positioning service, the method comprising: performing an area event session with a SUPL enabled terminal (SET); receiving from the SET, a SUPL Triggered Start message that includes a cause for re-sending the SUPL Triggered Start message, a session-id, SET capabilities, and a location identifier; finding a visited SUPL location platform (V-SLP) for a session establishment according to the cause for re-sending the SUPL Triggered Start message, using the location identifier included in the received SUPL Triggered Start message; transmitting to the V-SLP, the SUPL Triggered Start message through use of a RLP request message; receiving from the V-SLP, a SUPL Triggered Response message through use of a RLP answer message; transmitting to the SET, the SUPL Triggered Response message that a session-id, a positioning method, and area event trigger parameters, the area event trigger parameters including one or more new cell ids of a specified area for the area event session; continuing to perform the area event session with the SET using the one or more new cell ids of the specified area for the area event session included in the area event trigger parameters included in the sent SUPL Triggered Response message; and receiving from the SET, a calculated positioning result when an area event occurs based on the one or more new cell ids of the specified area.