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Method and apparatus for controlling packet forwarding, and communication node

A technology for controlling groups and devices, which is applied in wireless communication, network data management, electrical components, etc., and can solve problems such as increased opportunities for group splits

Inactive Publication Date: 2008-06-18
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] So, there is the problem that each additional stage of encapsulation adds a lot of header overhead to the packet, thus causing a lot of processing delay at each encapsulation / decapsulation node
In addition, there is another problem that the chances of packet splitting on the way also increase

Method used

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  • Method and apparatus for controlling packet forwarding, and communication node
  • Method and apparatus for controlling packet forwarding, and communication node
  • Method and apparatus for controlling packet forwarding, and communication node

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Embodiment Construction

[0080] A description will be given below of preferred aspects of the present invention with reference to the accompanying drawings.

[0081] The present invention describes a method used by Mobility Anchor Points (MAPs) to eliminate the need for multi-level tunnel encapsulation associated with mobile nodes nested in mobile networks. The basic principle is that the MAP constructs a list of intermediate addresses in order to reach the mobile node based on the prefix information associated with the registered mobile routers. Then whenever a packet that needs to be forwarded arrives at the mobile node, the list of intermediate addresses is placed in the routing header. Furthermore, the list of intermediate addresses is also transmitted to the mobile node so that whenever the mobile node needs to forward packets through the MAP, it can place the list of intermediate addresses in the reverse routing header.

[0082] Using the configuration scenario shown in FIG. 1 , when mobile nod...

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Abstract

A technology is disclosed for reducing the number of encapsulations required when MAP forwards a packet to a mobile node which is layered within mobile networks, with mobile networks nested and multiple mobile routers chained behind MAP (Mobility Anchor Point). When a node 420 with Address A wants to send a packet to a node 450 with Address D, the node with Address A inserts a list of immediate addresses into the packet. The list includes a node 430 with Address B and a node 440 with Address C, and the destination address of the packet is set to a next hop destination Address B. The node with Address B receives the packet and swaps the destination address with Address C described in the list of immediate addresses. Similarly, the node with Address C processes the same swapping process, and then the packet reaches the node with Address D.

Description

technical field [0001] The present invention relates to a packet forwarding control method and device in a packet switched data communication network such as an IP (Internet Protocol) network. More particularly, the present invention relates to a packet forwarding control method and apparatus for forwarding packets transmitted and received by nodes using Mobile IP and HMIP (Hierarchical Mobile IP). Background technique [0002] Many devices today use IP networks to communicate with each other. In order to provide mobility support for mobile devices, the Internet Engineering Task Force (IETF) has developed "Mobility Support in IPv6" (see Non-Patent Document 1 below). In Mobile IP, each mobile node has a permanent home domain. When a mobile node attaches to its home network, it is assigned a primary global address called a Home Address (HoA). [0003] When a mobile node leaves, ie attaches to other foreign networks, it is usually assigned a temporary global address called a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04W8/08H04W40/02H04W80/04H04W84/00
CPCH04W84/005H04L45/36H04W80/04H04W8/085H04W40/02H04L45/741H04W28/06
Inventor 平野纯吴振华陈必耀添明.B.高
Owner PANASONIC CORP
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