Method for hierarchical mobile IPv6 to avoid inter-domain handover

A technology of internal switching and mobile nodes, applied in the direction of electrical components, wireless communication, network data management, etc., to achieve the effect of reducing excessive MAP area, reducing transmission time, and avoiding inter-domain switching

Inactive Publication Date: 2009-08-26
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

As shown in the figure, according to this method, it is calculated that the MN is more likely to move within the management area of ​​MAP2. Using MAP2 as the currently registered MAP can effectively reduce the number of inter-domain handovers. However, when the MN changes its previous mobility When a feature needs to be moved to a range outside the management area of ​​MAP2, such as when moving to AR2 or AR6, it needs to register with a new MAP. During this process, inter-domain switching will still occur

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Embodiment Construction

[0049] figure 1 It is a network topology diagram of hierarchical mobile IPv6. In an actual network, the setting of MAP is often multi-level, that is, the network topology is like a multi-fork tree. This structure is composed of hierarchical and tree-like arranged MAPs and access routers AR. The management area of ​​the high-level MAP covers multiple low-level MAPs, and each low-level MAP belongs to only one high-level MAP management area. AR is located at the leaves of the tree structure. Each MAP in the tree structure uses its own address as the RCoA, and the RCoA periodically transmits the MAP or AR to the lower-layer MAP or AR through the router advertisement message with the MAP option. At the same time, each MAP will add its own MAP information to the received RA message and forward the message to the lower MAP or AR. No matter which level the MAP is in the tree structure, the One and only one branch of the structure reaches a certain AR at the leaf. In an actual netw...

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Abstract

The invention discloses a method for a hierarchical mobile IPv6 to avoid inter-domain handover, and aims to provide a method for dynamically handing over MAP to avoid inter-domain handover. The technical proposal is characterized by firstly constructing an MAP hierarchical list, then selecting an MAP which is the lowest hierarchy in the MAP hierarchical list according to MAP information received by an AR for log-in; searching by an MN with the obtained MAP hierarchical list, and finding out an MAP which has the same root node on branches on which AR-PAR used before MN handover and AR-NAR used after expected MN handover are arranged, and is nearest to an access router; determining handover from an PAR to an NAR is intra-domain handover or inter-domain handover, performing MAP binding update and HA binding update in advance to avoid the inter-domain handover if the handover is the inter-domain handover; finally handing over to the NAR when the detected signal strength of the NAR is stronger than that of the PAR while the MN is moving. The method can be used for avoiding the inter-domain handover, and reducing signaling interaction time between the MN and the MAP.

Description

technical field [0001] The invention relates to a method for reducing switching delay in a hierarchical mobile IPv6 (HMIPv6, Hierarchical Mobile IPv6) network, in particular to a method for reducing inter-domain switching delay by avoiding the occurrence of inter-domain switching. Background technique [0002] In order to support mobility in the next generation Internet, IETF (Internet Engineering Task Force, Internet Engineering Task Force) began to formulate the Mobile IPv6 (MIPv6, Mobile IPv6) protocol at the end of the last century, and formed RFC3775 (Mobility Support in IPv6 ) documentation. However, there are still many defects in the mobile IPv6 protocol itself, such as mobile nodes (MN, Mobile Node, nodes that can roam in different networks and can be accessed through the home address) must report to the home agent (HA, Home Agent) and correspondent node (CN, Correspondent Node) registration, as the number of nodes increases, it will lead to increased signaling red...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W8/02H04W36/08
Inventor 陈晓梅王宝生刘亚萍刘建洋党岗陶静张晓哲陈琳赵锋
Owner NAT UNIV OF DEFENSE TECH
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