US 8,553,689 B2Granted

Home agent acting as a proxy for a Mobile Node

AssigneePanasonic Corporation

InventorsJens Bachmann, Kilian Weniger

Life of this patent

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Abstract

In node management in a packet-switched network, a first node acts as a proxy for a second node. Both nodes have network-layer addresses at the network layer and link-layer addresses at the link layer. The first node receives a request to receive and forward packets addressed to the second node's network-layer address. The same network-layer address is associated with the first and the second node, and the first and the second node have distinct link-layer addresses. The first node advertises to nodes attached to the packet-switched network the first node's link-layer address as a destination address for the second node's network-layer address; the second node does not advertise. The first node receives in response to advertising, packets destined to the second node's network-layer address having the first node's link-layer address and forwards packets addressed to the second node's network-layer address to the second node using its link-layer address.

Claims5

Dependent claims

A home agent on a home link, the home agent being a router configured to control forwarding of packets destined to a mobile node, wherein the mobile node is attached to the home link, and at least one router other than the home agent is on the home link, the home agent comprising:

a receiver configured to intercept packets destined to the mobile node's home address, wherein the receiver is further configured to receive from the mobile node a request to receive and forward the packets addressed to the mobile node's home address, the request including a mobile node's link-layer address;
an advertising unit, including a processor, configured to advertise on the home link, on behalf of the mobile node, the home agent's link-layer address as a destination address for the mobile node's home address, wherein the mobile node stops an operation of advertising, to the at least one router on the home link, the mobile node's link-layer address,
wherein the receiver is further configured to receive from the at least one router, in response to advertising of the home agent's link-layer address, the packets destined to the mobile node's home address having the home agent's link-layer address, and wherein the home agent further comprises:
a forwarding unit configured to forward all packets, addressed to the mobile node's home address, to the mobile node using the mobile node's link-layer address.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 13/438,730Filed 3 Apr 2012 · continuation
Priority: EP 0502035419 Sep 2005
Published: US 2012/0188944 A126 Jul 2012
Granted: 8 Oct 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H04W 8/04
Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of…:…
H04W 60/005
Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration: multiple registrations, e.g. multihoming
H04W 8/26
Network data management: network addressing or numbering for mobility support
H04W 80/02
Wireless network protocols or protocol adaptations to wireless operation: data link layer protocols

Family

PCT/EP2006/007611Parent of this continuation · filed 1 Aug 2006
US 2012/0188944 A1Pre-grant publication · published 26 Jul 2012
Application12/067,137Parent of this continuation
US 8,170,010 B2Parent of this continuation
US 2008/0253382 A1Published application
US 8,553,689 B2This patent

From the US filing history. Foreign family members aren’t listed.