Method and system for inter-operability between mobile IP and RSVP during route optimization

• US 20020015395A1
• Filed: 07/12/2001
• Published: 02/07/2002
• Est. Priority Date: 07/31/2000
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Karagiannis, Georgios
• Granted Patent: US 6,925,075 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/724 at intermediate nodes, e.g. resource reservation protocol [RSVP]
• CPC Class Codes: H04L 47/801 Real time traffic
• CPC Class Codes: H04L 47/824 Applicable to portable or mobile terminals
• CPC Class Codes: H04L 47/825 Involving tunnels, e.g. MPLS
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/167 Adaptation for transition between two IP versions, e.g. between IPv4 and IPv6 translation of Internet protocol [IP] addresses H04L61/2503
• CPC Class Codes: H04W 8/082 for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]

Abstract

A correspondent host that needs to begin a real-time packet-data session with a mobile node sends a mobile IP binding request message to a home agent of the mobile node. The correspondent host does not send any further messages until it has received a binding update message in response to the binding request message. Upon receipt of the binding update message, the correspondent host knows a care-of address of the mobile node. A binding to the care-of address is created responsive to receipt of the binding update message. An RSVP PATH message is sent by the correspondent host responsive to receipt of the binding update message. The RSVP PATH message explicitly binds a data path of a packet flow to the mobile node. The correspondent host perceives a RSVP RESV message in response to the RSVP PATH message.

Claims

1. A route-optimization method comprising the steps of:

sending a binding request;

receiving a binding update in response to the binding request, wherein the binding update includes a care-of address of a mobile node;

creating abinding to the care-ofaddress responsive to receipt of the binding update;

sending a path message responsive to receipt of the binding update, wherein the path message explicitly binds a data path of a packet flow to the mobile node; and

receiving a reservation request message responsive to the path message.

2. The method of claim 1 wherein a correspondent host performs the steps of sending the binding request, receiving the binding update, creating the binding, sending the path message, and receiving the reservation request message.

3. The method of claim 1 operating according to mobile IP version 4.

4. The method of claim 1 operating according to mobile IP version 6.

5. The method of claim 3 operating according to RSVP.

6. The method of claim 4 operating according to RSVP.

7. The method of claim 5 wherein the path message comprises an RSVP PATH message and the reservation request message comprises an RSVP RESV message.

8. The method of claim 6 wherein the path message comprises an RSVP PATH message and the reservation request message comprises an RSVP RESV message.

9. A correspondent host adapted to:

send a binding request;

receive a binding update in response to the binding request, wherein the binding update includes a care-of address of a mobile node;

create a binding to the care-of address responsive to receipt of the binding update;

send a path message responsive to receipt of the binding update, wherein the path message explicitly binds a data path of a packet flow to the mobile node; and

receive a reservation request message responsive to the path message.

10. The host of claim 9 adapted to operate according to mobile IP version 4.

11. The host of claim 9 adapted to operate according to mobile IP version 6.

12. The host of claim 10 adapted to operate according to RSVP.

13. The host of claim 11 adapted to operate according to RSVP.

14. The host of claim 12 wherein the path message comprises an RSVP PATH message and the reservation request message comprises an RSVP RESV message.

15. The host of claim 13 wherein the path message comprises an RSVP PATH message and the reservation request message comprises an RSVP RESV message.

17. The method of claim 16 wherein the steps of receiving and sending are performed by a home agent.

18. The method of claim 16 wherein the steps of receiving and sending are performed by the mobile node.

19. The method of claim 16 operating according to mobile IP version 4.

20. The method of claim 16 operating according to mobile IP version 6.

21. The method of claim 19 operating according to RSVP.

22. The method of claim 20 operating according to RSVP.

23. The method of claim 21 wherein the path message comprises an RSVP PATH message and the reservation request message comprises an RSVP RESV message.

24. The method of claim 22 wherein the path message comprises an RSVP PATH message and the reservation request message comprises an RSVP RESV message.

26. The method of claim 25 wherein the steps of receiving the binding request, sending the binding update, receiving the path message, and sending the reservation request message are performed by the mobile node.

27. The method of claim 25 wherein the steps of receiving the binding request and sending the binding update are performed by a home age and nd the steps of receiving the path message and sending the reservation request message are performed by the mobile node.

28. The method of claim 25 operating according to mobile IP version 4.

29. The method of claim 25 operating according to mobile IP version 6.

30. The method of claim 28 operating according to RSVP.

31. The method of claim 29 operating according to RSVP.

32. The method of claim 30 wherein the path message comprises an RSVP PATH message and the reservation request message comprises an RSVP RESV message.

33. The method of claim 31 wherein the path message comprises an RSVP PATH message and the reservation request message comprises an RSVP RESV message.

35. The agent of claim 34 adapted to operate according to mobile IP version 4.

36. The agent of claim 35 adapted to operate according to RSVP.

37. The agent of claim 36 wherein the path message comprises an RSVP PATH message and the reservation request message comprises an RSVP RESV message.

39. The system of claim 38 adapted to operate according to mobile IP version 4.

40. The system of claim 39 adapted to operate according to RSVP.

41. The system of claim 40 wherein the path message comprises an RSVP PATH message and the reservation request message comprises an RSVP RESV message.

16. A route-optimization method comprising the steps of:

receiving a binding request; and

sending a binding update in response to the binding request, wherein the binding update includes a care-of address of a mobile node, a binding to the care-of address is created responsive to receipt of the binding update, a path message that explicitly binds a data path of a packet flow to the mobile node is sent responsive to receipt of the binding update, and a reservation request message is sent responsive to the path message.

25. A route-optimization method comprising the steps of:

receiving a binding request;

sending a binding update in response to the binding request, wherein the binding update includes a care-of address of a mobile node;

receiving a path message sent in response to receipt of the binding update, wherein the path message explicitly binds a data path of a packet flow to the mobile node; and

sending a reservation request message responsive to the path message.

34. A home agent adapted to:

receive a binding request; and

send a binding update in response to the binding request, wherein the binding update includes a care-of address of a mobile node, abinding to the care-of address is created responsive to receipt of the binding update, a path message that explicitly binds a data path of a packet flow to the mobile node is sent responsive to receipt of the binding update, and a reservation request message is sent responsive to the path message.

38. A route-optimization system comprising:

a home agent receiving a binding request and sending a binding update responsive to the binding request, wherein the binding update includes a care-of address of a mobile node; and

a correspondent host receiving the binding update, sending a path message, the path message explicitly binding a data path of a packet flow to the mobile node, in response to receipt of the binding update, and receiving a reservation request message responsive to the path message.