Method for solving mapping failure

A mapping relationship and router technology, applied in the network field, can solve problems such as mapping relationship failure, achieve the effect of saving network resources, avoiding mapping relationship, and shortening packet forwarding delay

Inactive Publication Date: 2012-02-15
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the basis of ensuring the normal communication of the terminal, the method can update the mapping entries cached at the access router in a timely manner, thereby not only effectively solving the problem of invalid mapping relationship, but also overcoming problems such as triangular routing in existing technical solutions

Method used

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  • Method for solving mapping failure
  • Method for solving mapping failure
  • Method for solving mapping failure

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0046] exist Figure 4 In , it is assumed that node B is a mobile node, and node A is the communication peer of mobile node B. The access router of node A is AR0; the mobile node B initially accesses the network through access router AR1, and then successively accesses the network through access routers AR2, AR3, . . . , ARk.

[0047] When the mobile node moves from the access router AR1 to the access router AR2, the access router AR1 sets a pointer for the mobile node B to point to the access router AR2, and sets a timer "clock 1" for the pointer, as in Figure 4 (a) shown. Similarly, when the mobile node B moves to the access router AR3, the access router AR2 sets a pointer for the mobile node B to point to the access router AR3, and sets a timer "clock 2" for the pointer, such as Figure 4 (b) shown. Similarly, when the mobile node B moves to the access router AR4, the access router AR3 sets a pointer for the mobile node B to point to the access router AR4, and sets a ti...

Embodiment 2

[0055] The present invention can be used not only in the manner shown in Embodiment 1, but also in other manners. Such as Figure 5 As shown, in this embodiment, there are several mobility management domains in the network. Within each mobility management domain, each mobile node has a local anchor. For different mobile nodes, their local anchor points may be different. When a mobile node (such as Figure 5 Mobile Node B) different access routers in the mobility management domain (such as Figure 5 When moving between access routers AR2 and AR3), each access router reports to its local anchor that it is the current access router of the mobile node, such as Figure 5 Shown in (1) and (3). When its local anchor discovers that a mobile node accesses the mobility management domain for the first time, it registers the mapping relationship of the mobile node with the mapping system, and makes the mapping relationship point to the anchor point. exist Figure 5 In , the local a...

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Abstract

The invention relates to a method for solving mapping failure, aiming to promptly update a mapping entry cached at an access router at an opposite end. The access router of a mobile node adopts the following procedures to forward a packet to be transmitted to the mobile node: finding whether the mobile node is connected with a network through the access router to directly send the packet to the mobile node; and checking a local mapping table to find whether the mapping of the mobile node is cached; if the mapping of the mobile node is not cached, informing an access router corresponding to a packet source of the mapping of the mobile node, otherwise, finding whether a local pointer is maintained for the mobile node; and if the local pointer is maintained for the mobile node, forwarding the packet to a following access router pointed by the pointer, otherwise, discarding the packet. Various types of mapping failure caused by movement can be effectively solved, triangular routing can be avoided, and network resources can be saved.

Description

technical field [0001] The invention relates to a method for effectively solving the failure of a mapping relationship, which belongs to the field of network technology. Background technique [0002] In the traditional TCP / IP architecture, the IP address not only represents the position of the network node in the network, but also represents the identity of the network node in the network. This semantic dual attribute of IP addresses leads to major flaws in the traditional Internet in terms of scalability, security, and mobility. [0003] For this reason, the idea of ​​separation of identity and location, which is characterized by representing the identity attribute and location attribute of an IP address with an identity identifier and a location identifier, came into being. [0004] For example: the location and identity separation protocol proposed by CISCO [Locator / ID Separation Protocol (LISP), see http: / / tools.ietf.org / pdf / draft-ietf-lisp-09.pdf], integrated network s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06H04L12/747
Inventor 罗洪斌张宏科王洪超周华春董平刘颖
Owner BEIJING JIAOTONG UNIV
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