Network-initiated area event triggered positioning method for roaming terminal in mobile communication system

• US 7,970,397 B2
• Filed: 07/08/2010
• Issued: 06/28/2011
• Est. Priority Date: 04/06/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Shim, Dong-Hee
• Primary Examiner(s): ZEWDU, MELESS NMN
• Application Number:
  US12/832,917
• Publication Number:
  US 20100273479A1
• Time in Patent Office: 355 Days
• Field of Search: 455410-411, 4554141-4142, 455/415, 4554321-4323, 455433-434, 4554351-4353, 455436-451, 4554561-4566, 455/461, 455/466, 455/517, 455524-525, 455/550.1, 455/551, 455/552.1, 455/556.2, 455557-558, 455560-561, 455418-420, 455/422.1, 709202-203, 709218-219, 709/226, 709228-229, 709/242, 719311-314, 719318-320, 370/310, 370/313, 370/328, 370/331, 370/349
• US Class Current: 455/432.1
• CPC Class Codes: G01S 5/0054 of actual mobile position, i.e. position calculation on base station
• CPC Class Codes: H04L 67/52 specially adapted for the location of the user terminal
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/021 Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 4/20 Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
• CPC Class Codes: H04W 60/04 using triggered events
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 8/08 Mobility data transfer
• CPC Class Codes: H04W 8/10 between location register and external networks
• CPC Class Codes: H04W 8/12 between location registers or mobility servers
• CPC Class Codes: H04W 80/08 Upper layer protocols network arrangements or communication protocols for networked applications H04L67/00

Abstract

A network-initiated area event triggered positioning method for a terminal in a session-based position information system is discussed. Network-initiation of area-based positioning of a roaming terminal is discriminated according to a proxy mode and a non-proxy mode, and area-based positioning for the roaming terminal is performed in various manners according to whether an SLP for performing the positioning procedure with respect to the discriminated modes is a V-SLP or an H-SLP.

Claims

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 the 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 trigger 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 the second server, trigger parameters, and the area ids corresponding to the areas for the area event triggered session;

receiving, by a 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;

obtaining, by the third server, a positioning result corresponding to the location identifier (lid) upon requesting from the second server through internal communications, wherein the positioning result was obtained by translating the location identifier (lid);

performing, by the third server, the positioning session with the SET by exchanging positioning messages with the SET to obtain a positioning result when the positioning result does not satisfy the QoP of the received MLP TLRR message;

sending, by the third server to the SET, a SUPL REPORT message including a session-id and the positioning result;

receiving, by the first server from the SET, the SUPL REPORT message including the session-id and the positioning result; and

sending, by the first server to the SUPL agent, a second MLP message including the positioning result.

2. The method of claim 1, further comprising:

sending, by the first server, a MLP TLRA (Mobile Location Protocol Triggered Location Reporting Answer) message to the SUPL agent to indicate that the SUPL triggered response has been accepted.

3. The method of claim 1, wherein the SUPL REPORT message is received from the SET if an event trigger condition has been met as a result of comparing the positioning result with the specific area in the trigger parameters.

4. The method of claim 1, further comprising:

sending, by the first server to the second server, a SUPL END message through a RLP (Roaming Location Protocol) message; and

sending, by the first server to the SET, a SUPL END message.

5. The method of claim 1, wherein, the positioning result is calculated by the third server if a SET-assisted mode exists or is calculated by the SET if a SET-based mode exists.

6. The method of claim 1, wherein the trigger type indicator is used to indicate an area event that relates to occurrences with respect to that area.

7. The method of claim 1, wherein the verifying step is based on routing information.

8. The method of claim 1, wherein the first server is a H-SLC (Home SUPL Location Center), the second server is a V-SLC (Visited SUPL Location Center), and the third server is a H-SPC (Home SUPL Positioning Center).

9. The method of claim 1, wherein the trigger parameters include area ids that represent one of ids of cells that belong to an event area, mobile country codes (MCC), mobile network codes (MNC), location area codes (LAC), and primary scrambling code numbers.

10. The method of claim 1, wherein the first server uses a proxy mode, and the third server has a positioning function.

11. 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 performed by the SET and comprising:

receiving, from a first server, a SUPL (Secure User Plane Location) INIT (initialization) message including a session-id, a trigger type indicator, a positioning method, and a SLP (SUPL Location Platform) mode;

sending, to the first server, a SUPL TRIGGERED START message to start an area event ˜

triggered session, the SUPL TRIGGERED START message including a session-id, a location identifier (lid), and SET capabilities;

receiving, from the first server, a SUPL TRIGGERED RESPONSE message including the session-id, a positioning method, an address of a second server, trigger parameters, and area ids corresponding to areas for the area event triggered session;

sending, to the second server, a SUPL POS INIT (positioning initialization) message to start a positioning session with the second 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;

performing the positioning session with the second server by exchanging positioning messages with the second server to obtain a positioning result;

receiving, from the second server, a SUPL REPORT message including a session-id and the positioning result;

comparing the positioning result with a specific area in the trigger parameters to check when an event trigger condition has been met;

sending, to the first server, a SUPL REPORT message when the event trigger condition has been met, the SUPL REPORT message including the session-id and the positioning result; and

receiving, from the first server, a SUPL END message.

12. The method of claim 11, wherein the positioning result is calculated by the second server if a SET-assisted mode exists or is calculated by the SET if a SET-based mode exists.

13. The method of claim 11, wherein the trigger type indicator is used to indicate an area event that relates to occurrences with respect to that area.

14. The method of claim 11, wherein the first server is a H-SLC (Home SUPL Location Center) and second server is a H-SPC (Home SUPL Positioning Center).

15. The method of claim 11, wherein the trigger parameters include area ids that represent one of ids of cells that belong to an event area, mobile country codes (MCC), mobile network codes (MNC), location area codes (LAC), and primary scrambling code numbers.

16. The method of claim 11, wherein the first server uses a proxy mode, and the second server has a positioning function.