Flexible mobility framwork for heterogeneous roaming in next generation wireless networks

• US 20080176560A1
• Filed: 12/21/2007
• Published: 07/24/2008
• Est. Priority Date: 12/22/2006
• Status: Active Grant

• Current Assignee: KDDI Corporation, Telcordia Technologies Incorporated (Telefonaktiebolaget LM Ericsson)
• Original Assignee: KDDI Corporation
• Inventors: Chiba, Tsumehiko, Lin, Fuchun Joe, Idoue, Akira, Das, Subir, Yokota, Hidetoshi, Dutta, Ashutosh, Chee, Dana
• Granted Patent: US 8,625,551 B2
• Time in Patent Office: Days
• US Class Current: 455/433
• CPC Class Codes: H04W 12/062 Pre-authentication
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 80/10 adapted for application session management, e.g. SIP [Session Initiation Protocol] connection management H04W76/00; arrangements for session management H04L67/14

Abstract

A system and method for mobility support of a mobile node having a home network in a heterogeneous roaming environment is presented. The method comprises the steps of authenticating the mobile node in a visited network and obtaining an address for the mobile node in the visited network, establishing a security connection between a functional component in the visited network and an agent in the home network, creating a home address for the mobile node, and using the home address to generate a SIP signaling address, a SIP media address, and a non-SIP media address, such that SIP non-media is transmitted using the security connection to the SIP signaling address, SIP media is transmitted using the security connection to the SIP media address, and non-SIP media is transmitted using the security connection to the non-SIP media address.

Claims

1. A method for mobility support of a mobile node having a home network in a heterogeneous roaming environment, said method comprising the steps of:

authenticating the mobile node in a visited network and obtaining an address for the mobile node in the visited network;

establishing a security connection between a functional component in the visited network and an agent in the home network;

creating a home address for the mobile node; and

generating, using the home address, a SIP signaling address, a SIP media address, and a non-SIP media address;

wherein SIP signaling is transmitted using the security connection to the SIP signaling address, SIP media is transmitted using the security connection to the SIP media address, and non-SIP media is transmitted using the security connection to the non-SIP media address.

2. The method according to claim 1, wherein the home address for the mobile node is obtained from a functional component of an access router in the visited network.

3. The method according to claim 1, wherein the security connection is established over a tunnel.

4. The method according to claim 1, wherein the functional component is a mobile proxy and the agent is a local mobility anchor.

5. The method according to claim 1, wherein the home address is created during SIP registration and the home address comprises a prefix and an interface-id.

6. A method for mobility support of a mobile node having a home network in a heterogeneous roaming environment, said method comprising the steps of:

authenticating the mobile node in a visited network and obtaining an address for the mobile node in the visited network;

establishing more than one security connection between a functional component in the visited network and an agent in the home network;

creating a home address for the mobile node; and

generating a SIP signaling address for SIP, a SIP media address for SIP media, and a non-SIP media address for non-SIP media using the home address;

wherein SIP signaling is transmitted using a first of the security connections to the SIP media address, SIP media is transmitted using a second of the security connections to the SIP media address and non-SIP media is transmitted using a third of the security connections to the non-SIP media address.

7. The method according to claim 6, wherein the home address for the mobile node is obtained from a functional component of an access router in the visited network in cooperation with the agent in the home network.

8. The method according to claim 6, wherein the security connection is established over a tunnel.

9. The method according to claim 6, wherein the functional component is a mobile proxy and the agent is a local mobility anchor.

10. The method according to claim 6, wherein the home address is created during SIP registration and the home address comprises a prefix and an interface-id.

11. A system for mobility support of a mobile node having a home network in a heterogeneous roaming environment, said system comprising:

a visited network authenticating the mobile node and determining an address for the mobile node;

a security connection between a functional component in the visited network and an agent in the home network;

a home address for the mobile node;

a SIP signaling address generated using the home address;

a SIP media address generated using the home address; and

a non-SIP media address generated using the home address,

wherein SIP signaling is transmitted using the security connection to the SIP signaling address, SIP media is transmitted using the security connection to the SIP media address, and non-SIP media is transmitted using the security connection to the non-SIP media address.

12. The system according to claim 11, wherein the home address for the mobile node is obtained from a functional component of an access router in the visited network.

13. The system according to claim 11, wherein the security connection is a tunnel.

14. The system according to claim 11, wherein the functional component is a mobile proxy and the agent is a local mobility anchor.

15. The system according to claim 11, wherein the home address is created during SIP registration and the home address comprises a prefix and an interface-id.

16. A system for mobility support of a mobile node having a home network in a heterogeneous roaming environment, said system comprising:

a visited network authenticating the mobile node and determining an address for the mobile node;

a plurality of security connections between a functional component in the visited network and an agent in the home network;

a home address for the mobile node;

a SIP signaling address generated using the home address;

a SIP media address generated using the home address; and

a non-SIP media address generated using the home address,

wherein SIP signaling is transmitted using a first of the plurality of security connections to the SIP signaling address, SIP media is transmitted using a second of the plurality of security connections to the SIP media address, and non-SIP media is transmitted using a third of the plurality of security connection to the non-SIP media address.

17. The system according to claim 16, wherein the home address for the mobile node is obtained from a functional component of an access router in the visited network.

18. The system according to claim 16, wherein the security connection is a tunnel.

19. The system according to claim 16, wherein the functional component is a mobile proxy and the agent is a local mobility anchor.

20. The system according to claim 16, wherein the home address is created during SIP registration and the home address comprises a prefix and an interface-id.