ROAMING METHOD AND SYSTEM IN LOCATION INFORMATION SYSTEM

• US 20090176488A1
• Filed: 12/19/2008
• Published: 07/09/2009
• Est. Priority Date: 09/13/2004
• Status: Abandoned Application

• Current Assignee: Dong-Hee Shim
• Original Assignee: Dong-Hee Shim
• Inventors: SHIM, Dong-Hee
• Application Number:
  US12/340,456
• Publication Number:
  US 20090176488A1
• Time in Patent Office: Days
• US Class Current: 455/432.100
• CPC Class Codes: H04L 12/46 Interconnection of networks
• CPC Class Codes: H04L 47/40 using split connections
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/20 Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
• CPC Class Codes: H04W 80/06 Transport layer protocols, e.g. TCP [Transport Control Protocol] over wireless transmission control protocol/Internet protocol [TCP/IP] or user datagram protocol [UDP] H04L69/16

Abstract

A method and device for obtaining position information of a target terminal are discussed. According to the embodiment, the method includes cooperating with a home network to provide information about the visited network to the home network; receiving a SUPL POS INIT message from the target terminal that received the information about the visited network used to establish a direct connection between the target terminal and the visited network; and performing a SUPL positioning session with the target terminal.

Claims

1. A method of obtaining position information of a target terminal, the method performed by a visited network and comprising:

cooperating with a home network to provide information about the visited network to the home network;

receiving a SUPL POS INIT message from the target terminal that received the information about the visited network used to establish a direct connection between the target terminal and the visited network; and

performing a SUPL positioning session with the target terminal.

2. The method of claim 1, further comprising:

sending a SUPL END message to the target terminal to inform that the SUPL positioning session is finished.

3. The method of claim 1, wherein the visited network includes a visited SUPL location platform (V-SLP) that comprises a visited SUPL location center (V-SLC) and a visited SUPL positioning center (V-SPC), and the cooperating step comprises:

transmitting a RLP (roaming location protocol) SSRLIR (standard SUPL roaming location immediate request) message from the H-SLP to the V-SLC, the RLP SSRLIR message including a session identification and an identification of the target terminal.

4. The method of claim 3, further comprising:

after the step of transmitting the RLP SSRLIR message, communicating at least one message between the V-SLC and the V-SPC, the at least one message including an address of the V-SPC and a port number.

5. The method of claim 4, further comprising:

after the communicating step, transmitting a RLP response message from the V-SLC to the H-SLP, the RLP response message including the session identification, the address of the V-SPC, and the port number and responding to the RLP SSRLIR message.

6. A visited network comprising:

a visited SUPL location platform (V-SLP) that is adapted to perform the steps of,

cooperating with a home network to provide information about the visited network to the home network;

receiving a SUPL POS INIT message from the target terminal that received the information about the visited network used to establish a direct connection between the target terminal and the visited network; and

performing a SUPL positioning session with the target terminal.

7. The visited network of claim 6, wherein the V-SLP is further adapted to perform the step of:

sending a SUPL END message to the target terminal to inform that the SUPL positioning session is finished.

8. The visited network of claim 6, wherein the V-SLP comprises a visited SUPL location center (V-SLC) and a visited SUPL positioning center (V-SPC), and the cooperating step comprises:

transmitting a RLP (roaming location protocol) SSRLIR (standard SUPL roaming location immediate request) message from the H-SLP to the V-SLC, the RLP SSRLIR message including a session identification and an identification of the target terminal.

9. The visited network of claim 8, wherein the V-SLP is further adapted to perform the step of:

after the step of transmitting the RLP SSRLIR message, communicating at least one message between the V-SLC and the V-SPC, the at least one message including an address of the V-SPC and a port number.

10. The visited network of claim 9, wherein the V-SLP is further adapted to perform the step of:

after the communicating step, transmitting a RLP response message from the V-SLC to the H-SLP, the RLP response message including the session identification, the address of the V-SPC, and the port number and responding to the RLP SSRLIR message.