Seamless interface switching method for PMIPv6 (Proxy Mobile Internet Protocol v6) multi-connection mobile nodes

Abstract

The invention relates to a seamless interface switching method for PMIPv6 (Proxy Mobile Internet Protocol v6) multi-connection mobile nodes, belonging to the field of PMIPv6. A mobile node is provided with a plurality of network interfaces which simultaneously access to the same PMIPv6 domain, when one network interface (assumed as IF1) of the mobile node is accessed to an MAG3 (Mobile Access Gateway 3) in the same PMIPv6 from an MAG1, data transmitted on the interface is firstly transmitted onto the MAG connected with other network interfaces of the mobile node, and then transmitted to the non-switching interface of the mobile node; and when an LMA (Lightspeed Memory Architecture) detects that the mobile node is leaving the MAG1, the LMA directly transmits the data flow onto the MAG connected with other network interfaces of the mobile node, thereby realizing seamless data transmission in the interface switching process of the mobile node.

Description

technical field [0001] The invention belongs to the field of proxy mobile IPv6 (PMIPv6), and relates to a method for seamless interface switching of multiple connection mobile nodes of proxy mobile IPv6. Background technique [0002] With the rapid development of Internet access technology and mobile terminal equipment, network terminal equipment is often equipped with multiple network interfaces, and it has become possible for one terminal to simultaneously access multiple heterogeneous network domains. At the same time, more and more users hope to enjoy network access services anytime and anywhere, so support for mobility is an inevitable requirement for future Internet protocol development. At present, the IETF MIF (Multi-interface) working group is committed to formulating the standardization of multi-interface-related protocol mechanisms. In order to meet the needs of users to access the network anytime and anywhere, IETF has established a series of related working gro...

AI Technical Summary

Problems solved by technology

For the two handover technologies in RFC 5949, the data transmitted during the handover process of the mobile node interface needs to be cached on the MAG, which increases the requirements for the storage capacity of the MAG. When there are multiple mobile nodes within the coverage of the MAG When switching at the same time, it may cause data loss due to insufficient storage capacity of the MAG. At the same time, because the data needs to be cached before forwarding, the data transmission delay will also be greatly increased, which is fatal for transmission delay-sensitive applications.

The multi-interface mobile node interface switching technology that supports fault tolerance proposed by Haisheng Jiang et al. uses the characteristics of multiple interfaces of the mobile node to assist in data transmission during the interface switching process, but forwards the data packets sent to the switching interface to the LMA , and then redirecting to other interfaces of the mobile node does not effectively solve the problem that the two technologies in RFC 5949 require too much caching capability of the MAG. Further, the data is first forwarded to the LMA, and then forwarded to other interfaces of the mobile node The data forwarding method may cause greater delay

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