Apparatus and method for extending mobility in a mobile ad hoc network

• US 7,848,757 B2
• Filed: 10/29/2004
• Issued: 12/07/2010
• Est. Priority Date: 10/29/2004
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Company (HP Inc.), Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Ramanarayanan, Gowri Shankar, Duggi, Mohan R.
• Primary Examiner(s): Anderson; Matthew D
• Assistant Examiner(s): GONZALES, APRIL GUZMAN
• Application Number:
  US10/977,043
• Publication Number:
  US 20060092939A1
• Time in Patent Office: 2,230 Days
• Field of Search: 370/392, 370/338, 370/401, 370/400, 370/328, 370/466, 370/349, 455/445, 455/410, 455/414.1, 455/437, 455/438, 455/439, 709/238, 709/236, 709/242, 709/239, 709/227, 709/245
• US Class Current: 455/445
• CPC Class Codes: H04W 48/14 using user query or user detection
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 88/182 Network node acting on behalf of an other network entity, e.g. proxy
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

Mobility in a mobile ad hoc network (MANET) can be extended by using fixed network resources to support MANET-level communication between a traveling MANET node and the remainder of the MANET. The IPv6 protocol is used over the fixed network resources to support the MANET-level communication, and mobility-supporting features of the IPv6 protocol are exploited without modifying the IPv6 protocol.

Claims

1. An apparatus for extending mobility in a mobile ad-hoc network (MANET) comprising a plurality of MANET nodes, the apparatus comprising:

an IPv6 controller configured to receive an IPv6 binding update from a traveling MANET node and, in response to receiving the IPv6 binding update, produce an IPv6 proxy Neighbor Advertisement, the IPv6 proxy Neighbor Advertisement comprising a link layer address of the apparatus, wherein the link layer address serves as the home address for the traveling MANET node; and

a MANET controller coupled to said IPv6 controller and configured to recognize when said IPv6 controller produces the IPv6 proxy Neighbor Advertisement on behalf of the traveling MANET node, the traveling MANET node outside wireless communication range of the other MANET nodes, wherein said MANET controller is further configured to perform proxy communication with the mobile ad-hoc network on behalf of the traveling MANET node in response to said recognition.

2. The apparatus as set forth in claim 1, wherein said MANET controller is further configured to transmit on the mobile ad-hoc network information from the IPv6 proxy Neighbor Advertisement in response to said recognition.

3. The apparatus as set forth in claim 2, wherein said apparatus is configured to operate as a gateway apparatus and further comprises a first interface to a wired network and a second interface to a wireless network.

4. The apparatus as set forth in claim 3, wherein said first interface is coupled to said IPv6 controller and said second interface is coupled to said MANET controller.

5. The apparatus as set forth in claim 4, wherein said information further comprises destination address information which the mobile ad-hoc network is to use for proxy communication with the traveling MANET node.

6. The apparatus as set forth in claim 5, wherein said MANET controller is further configured to encapsulate the IPv6 proxy Neighbor Advertisement in a MANET-level packet in response to said recognition.

7. An apparatus for extending mobility in a mobile ad-hoc network (MANET) comprising a plurality of MANET nodes, the apparatus comprising:

a MANET controller configured to broadcast information from an IPv6 Neighbor Advertisement from a mobile MANET node over the mobile ad-hoc network, the mobile MANET node outside wireless communication range of the other MANET nodes, the IPv6 Neighbor Advertisement produced in response to an IPv6 binding update from the mobile MANET node, the IPv6 Neighbor Advertisement comprising a link layer address of the apparatus, wherein the link layer address serves as the home address for the traveling MANET node,

wherein said MANET controller, in response to said IPv6 Neighbor Advertisement, is further configured to perform proxy communication with the mobile ad-hoc network on behalf of the mobile MANET node.

8. The apparatus as set forth in claim 7, further comprising an IPv6 controller provided in said mobile MANET node and configured to produce said IPv6 Neighbor Advertisement, wherein said MANET controller provided in said mobile MANET node together with said IPv6 controller.

9. The apparatus as set forth in claim 7, wherein said MANET controller is further configured to encapsulate the IPv6 Neighbor Advertisement in a MANET-level packet.

10. The apparatus as set forth in claim 7, wherein said MANET controller is further configured to receive from a source MANET node a routing discovery request for a destination MANET node and said MANET controller is further configured to respond to the routing discovery request by sending a proxy MANET routing discovery reply to the source MANET node on behalf of the destination MANET node.

11. The apparatus as set forth in claim 10, wherein said MANET controller is responsive to the routing discovery request for determining whether the destination MANET node has been previously determined to require proxy communication with the mobile ad-hoc network.

12. The apparatus as set forth in claim 10, wherein said MANET controller is configured, after sending the proxy MANET routing discovery reply, to perform further proxy communication with the source MANET node on behalf of the destination MANET node.

13. The apparatus as set forth in claim 10, wherein said apparatus is implemented as a gateway apparatus.

14. A method of extending mobility in a mobile ad-hoc network (MANET) comprising a plurality of MANET nodes, the method comprising the steps of:

receiving an IPv6 binding update from a traveling MANET node;

in response to receiving the IPv6 binding update, producing an IPv6 proxy Neighbor Advertisement, the IPv6 proxy Neighbor Advertisement comprising a link layer address of a home agent, wherein the link layer address serves as the home address for the traveling MANET node;

recognizing the IPv6 proxy Neighbor Advertisement produced on behalf of the traveling MANET node, the traveling MANET node outside wireless communication range of the other MANET nodes; and

in response to the step of recognizing, executing one of (a) performing proxy communication with the mobile ad-hoc network on behalf of the traveling MANET node, and (b) transmitting on the mobile ad-hoc network information from the IPv6 proxy Neighbor Advertisement.

15. The method as set forth in claim 14, further comprising the step of adding the traveling MANET node to a proxy list in response to the step of recognizing.

16. The method as set forth in claim 14, wherein the step of transmitting includes the step of encapsulating the IPv6 proxy Neighbor Advertisement in a MANET-level packet.

17. The method as set forth in claim 14, wherein the information includes destination address information which the MANET is to use for proxy communication with the traveling MANET node.

18. The method as set forth in claim 14, further comprising the steps of:

receiving from a source MANET node a routing discovery request for a destination MANET node; and

in response to receipt of the routing discovery request, sending a proxy MANET routing discovery reply to the source MANET node on behalf of the destination MANET node.

19. The method as set forth in claim 18, further comprising the step, in response to the routing discovery request, of determining that the destination MANET mode has been previously determined to require proxy communication with the mobile ad-hoc network.

20. The method as set forth in claim 18, further comprising the step, after the step of sending, of performing further proxy communication with the source MANET node on behalf of the destination MANET mode.