A method for supporting hnp renumbering in pmipv6

Abstract

The invention relates to a method for supporting HNP (Home Network Prefix) renumbering in PMIPv6 (Proxy Mobile Internet Protocol version 6). The method comprises the steps that 1) a LAM (Local Mobility Anchor) assigns a new HNP for a mobile node in which HNP renumbering occurs; 2) the LMA transmits a PBU (Proxy Binding Update) message to an MAG (Mobility Access Gateway), wherein an HNP option comprises new HNP information and identification information corresponding to the mobile node; 3) after the MAG receives the PBU message, a router notification message is constructed, the life value of the old HNP is set to be 0 and the life value of the new HNP is set to be a value which is more than 0; and 4) after the mobile node receives the router notification message, the old HNP is deleted and an effective communication address is configured by adopting the new HNP. On the basis of the PMIPv6 basic operating flow, the invention provides an active HNP renumbering solution, which can effectively reduce excessive time delay caused by the current processing flow based on passive HNP prefix change.

Description

technical field [0001] The invention belongs to the field of network technology, and in particular relates to a method for supporting HNP renumbering in PMIPv6. Background technique [0002] In recent years, the rapid development of wireless network technology and application services has created an era of mobile computing. However, in traditional mobile communication networks, mobility management is performed at the link layer. With the transition to IP-based packet switching networks, link layer mobility cannot solve the problems caused by switching between different IP subnets. So IETF started the research and standardization work of network layer mobility protocol. Initially, the network layer mobility protocols proposed by IETF are all client-based, such as Mobile IPv6 (Mobile IPv6, MIPv6) (C.Perkins, et al., Mobility Support in IPv6, IETF RFC6275, July2011.) and its extended protocols. However, there are some disadvantages in the terminal-based mobility management p...

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Problems solved by technology

[0005] 2) Multiple LMAs may coexist in the same PMIPv6 service provider's network. If the mobile node replaces the LMA but does not transfer the HNP allocated to it, the new LMA needs to re-allocate the HNP (J.Korhonen, et al. ,Runtime Local Mobility Anchor(LMA)Assignment Support for Proxy Mobile IPv6,IETF RFC6463,February2012.);

[0006] 3) Prefix information may change due to changes in network architecture (S.Jiang, et al., IPv6Enterprise Network Renumbering Scenarios and Guidelines, draft-ietf-6renum-enterprise-02, September 2012.)

In the PMIPv6 basic protocol, although the possibility of HNP renumbering is also considered, the related solution is not regulated in the standard (see RFC5213, Section6.12)

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