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Method and apparatus for controlling packet forwarding

A technology for controlling packets and devices, applied in network data management, electrical components, transmission systems, etc., to solve problems such as increased opportunities for packet fragmentation

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

[0005] Although Mobile IP allows mobility support in different static addressing schemes of IP infrastructure, there are some deficiencies
One such deficiency is the need to send a binding update to the home agent or peer node whenever the mobile changes its point of attachment to the Internet
[0030] So, there is the problem that each additional stage of encapsulation adds a lot of header overhead to the packet, and therefore, will cause a lot of processing delay at each encapsulation / decapsulation node
In addition, there is another problem that the chance of packet fragmentation in routing also increases

Method used

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  • Method and apparatus for controlling packet forwarding

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Embodiment Construction

[0065] Preferred aspects of the present invention will be described below with reference to the accompanying drawings.

[0066]The present invention describes a method used by a Mobility Anchor Point (MAP) to eliminate the need for multi-level tunnel encapsulation associated with mobile nodes within a mobile network. The basic approach is to let the MAP propagate the prefix information of the mobile network managed by the registered downstream mobile router to the upstream mobile router, so that when the upstream mobile router forwards packets between the mobile nodes nested within its mobile network and the MAP, the upstream mobile A router can simply change the source or destination address of a packet to eliminate unnecessary tunneling or overcome ingress filtering.

[0067] For example, the following description uses the network architecture shown in FIG. 1 as an example. In FIG. 1 , when the MAP 120 receives a packet addressed to the RCoA of the mobile node MN 150 , it e...

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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). MAP 120 manages the binding information between RCoA and LCoA for each of lower-level nodes and grasps the prefixes of each of lower-level mobile routers, for example, the prefix of mobile network 104 of MR 140 or the prefix of mobile network 106 of MR 142. For example, MAP 120 informs MR 140 of the prefix of the mobile network 106 and the binding information between RCoA and LCoA. In this way, MR 140 can grasp a next forwarding destination of the packet transmitted from MAP 120 to MN 150, and the packet can be reached at MN 150 unless the packet is encapsulated multiple times.

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 some other foreign network, it is usually assigned a temporary global address call...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06
CPCH04W8/085H04W84/005H04W80/04H04W8/26
Inventor 平野纯吴振华陈必耀添明.B.高
Owner PANASONIC CORP
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