Patent ID: 7970396
Filing Date: 2011-06-28
Classification: G01S,H04L,H04W

Abstract:
1. A network-initiated area event triggered positioning method in a mobile communication system having a home network and a visited network that support roaming of a SET (SUPL Enabled Terminal), the method comprising: receiving, by a first server from a SUPL (Secure User Plane Location) agent a first MLP (Mobile Location Protocol) message including a MS-id, a client-id, a quality of positioning (QoP) and a TLRR (Triggered Location Reporting Request) event parameter; verifying, by the first server, whether the SET is roaming; sending, by the first server to the SET, a SUPL INIT (initialization) message including a session-id, a trigger type indicator, a positioning method, and a SLP (SUPL Location Platform) mode; receiving, by the first server, a SUPL TRIGGERED START message from the SET to start an area event triggered session, the SUPL TRIGGERED START message including a session-id, a location identifier (lid), and SET capabilities; sending, by the first server to a second server, a RLP TSRLRR (Roaming Location Protocol Triggered Standard Roaming Location Reporting Request) message that includes the SUPL TRIGGERED START message, the RLP TSRLRR message including area ids corresponding to areas for the area event triggered session; receiving, by the first server, a RLP TSRLRA (Roaming Location Protocol Triggered Standard Roaming Location Reporting Answer) message that includes a SUPL TRIGGERED RESPONSE message in response to the sending of the RLP TSRLRR message; sending, by the first server, the SUPL TRIGGERED RESPONSE message to the SET, the SUPL TRIGGERED RESPONSE message including a session-id, a positioning method, an address of a third server, trigger parameters, and the area ids corresponding to the areas for the area event triggered session; receiving, by the third server, a SUPL POS INIT (positioning initialization) message from the SET to start a positioning session with the third server when a current cell-id and one of the area ids correspond to each other, the SUPL POS INIT message including a session-id, a lid, and SET capabilities, wherein the first server receives the area ids of a specific area from the second server through the third server; performing, by the third server, the positioning session with the SET by exchanging positioning messages with the SET to obtain a positioning result; sending, by the third server, a SUPL REPORT message to the SET, the SUPL REPORT message including a session-id and the positioning result; receiving, by the first server from the SET, a SUPL REPORT message including the session-id and the positioning result; and sending, by the first server to the SUPL agent, the positioning result using a second MLP message.