Internet protocol address management for communicating packets in a network environment

• US 8,385,300 B2
• Filed: 10/03/2008
• Issued: 02/26/2013
• Est. Priority Date: 10/03/2008
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Andreasen, Flemming S., Leung, Kent K.
• Primary Examiner(s): HSU, ALPUS
• Application Number:
  US12/245,601
• Publication Number:
  US 20100088400A1
• Time in Patent Office: 1,607 Days
• Field of Search: 370/338, 370/349, 370/352, 370/395.52, 370/401, 455/435.1, 455/445, 455/453, 709/223, 709/245
• US Class Current: 370/338
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support

Abstract

A method is provided in one example implementation and the method includes identifying through a home bearer manager that an Internet Protocol (IP) address has been previously sent to an access terminal, the IP address being issued by a visited bearer manager as a result of the access terminal requesting registration in a visited network. The method further includes communicating the IP address to the access terminal in response to the access terminal registering in a home network. The registrations in the home and the visited network allow a plurality of packets to be communicated to the access terminal via the IP address. In more specific embodiments, the IP address serves as a care of address (CoA) address and a home IP address concurrently. The IP address can be exchanged via a mobile IP (MIP) exchange. The home and visited bearer managers are independent or interdependent.

Claims

1. A method, comprising:

identifying that an Internet Protocol (IP) address managed by a home bearer manager has been previously sent to an access terminal, the IP address being issued by a visited bearer manager as a result of the access terminal requesting registration in a visited network, wherein the visited bearer manager anchors a visited anchored bearer path for communications with the access terminal using the visited anchored bearer path, and wherein the home bearer manager anchors a home anchored bearer path for communication with the access terminal using the home anchored bearer path, the home anchored bearer path passing through the visited bearer manager; and

communicating the IP address to the access terminal in response to the access terminal registering in a home network, wherein the registrations in the home network and the visited network allow a plurality of packets to be communicated to the access terminal via the IP address.

2. The method of claim 1, wherein the IP address serves as a care of address (CoA) address and a home IP address concurrently.

3. The method of claim 1, wherein the IP address is exchanged via a mobile IP (MIP) exchange.

4. The method of claim 1, wherein a determination is made as to whether to use the home anchored bearer path or the visited anchored bearer path for communications.

5. The method of claim 4, wherein the determination further includes receiving a policy specifying use of the IP address.

6. The method of claim 4, wherein the determination further includes determining to use the IP address according to an instruction stored at the access terminal.

7. The method of claim 1, wherein the home and visited bearer managers are independent or interdependent.

8. The method of claim 1, wherein once the IP address is sent to the access terminal, the home bearer manager operates as both the visited bearer manager and the home bearer manager for the access terminal.

9. The method of claim 1, wherein the home bearer manager recognizes it is being used as a visited network anchor by evaluating a source IP address for a network address translation (NAT).

10. An apparatus, comprising:

a home bearer manager that identifies that an Internet Protocol (IP) address managed by the home bearer manager has been previously sent to an access terminal, the IP address being issued by a visited bearer manager as a result of the access terminal requesting registration in a visited network, wherein the home bearer manager communicates the IP address to the access terminal in response to the access terminal registering in a home network, and wherein the registrations in the home network and the visited network allow a plurality of packets to be communicated to the access terminal via the IP address; and

wherein the visited bearer manager anchors a visited anchored bearer path for communications with the access terminal using the visited anchored bearer path, and wherein the home bearer manager anchors a home anchored bearer path for communication with the access terminal using the home anchored bearer path, the home anchored bearer path passing through the visited bearer manager.

11. The apparatus of claim 10, wherein the IP address serves as a care of address (CoA) address and a home IP address concurrently.

12. The apparatus of claim 10, wherein the IP address is exchanged via a mobile IP (MIP) exchange, and wherein once the IP address is sent to the access terminal, the home bearer manager operates as both the visited bearer manager and the home bearer manager for the access terminal.

13. The apparatus of claim 10, wherein a determination is made as to whether to use the home anchored bearer path or the visited anchored bearer path for communications, and wherein the home bearer manager recognizes it is being used as a visited network anchor by evaluating a source IP address for a network address translation (NAT).

14. The apparatus of claim 13, wherein the determination further includes receiving a policy specifying use of the IP address.

15. The apparatus of claim 13, wherein the determination further includes determining to use the IP address according to an instruction stored at the access terminal.

16. Logic encoded in one or more non-transitory media for execution and when executed by a processor is operable to:

identify that an Internet Protocol (IP) address managed by a home bearer manager has been previously sent to an access terminal, the IP address being issued by a visited bearer manager as a result of the access terminal requesting registration in a visited network, wherein the visited bearer manager anchors a visited anchored bearer path for communications with the access terminal using the visited anchored bearer path, and wherein the home bearer manager anchors a home anchored bearer path for communication with the access terminal using the home anchored bearer path, the home anchored bearer path passing through the visited bearer manager; and

communicate the IP address to the access terminal in response to the access terminal registering in a home network, wherein the registrations in the home network and the visited network allow a plurality of packets to be communicated to the access terminal via the IP address.

17. The logic of claim 16, wherein the IP address serves as a care of address (CoA) address and a home IP address concurrently, and wherein the IP address is exchanged via a mobile IP (MIP) exchange.

18. The logic of claim 16, wherein a determination is made as to whether to use the home anchored bearer path or the visited anchored bearer path for communications.

19. The logic of claim 18, wherein the determination further includes receiving a policy specifying use of the IP address, and wherein the determination further includes determining to use the IP address according to an instruction stored at the access terminal.

20. The logic of claim 16, wherein once the IP address is sent to the access terminal, the home bearer manager operates as both the visited bearer manager and the home bearer manager for the access terminal.

21. A system, comprising:

means for identifying that an Internet Protocol (IP) address managed by a home bearer manager has been previously sent to an access terminal, the IP address being issued by a visited bearer manager as a result of the access terminal requesting registration in a visited network, wherein the visited bearer manager anchors a visited anchored bearer path for communications with the access terminal using the visited anchored bearer path, and wherein the home bearer manager anchors a home anchored bearer path for communication with the access terminal using the home anchored bearer path, the home anchored bearer path passing through the visited bearer manager; and

means for communicating the IP address to the access terminal in response to the access terminal registering in a home network, wherein the registrations in the home network and the visited network allow a plurality of packets to be communicated to the access terminal via the IP address, wherein the IP address serves as a care of address (CoA) address and a home IP address concurrently.