基于SDN的IPv6移动性管理机制研究

Research on IPv6 Mobility Management Mechanism Based on SDN

SDN网络思想为解决传统网络中网络层移动性管理面临的问题提供了新的解决思路,而SDN中现有的移动性管理方案仍面临用户移动过程中网络开销大和切换时延长等问题。研究在SDN网络中支持IPv6网络层移动性管理机制,通过对移动感知和移动切换两个关键技术进行分析设计,并结合位置预测理论提出了一种SDN网络中支持预切换的IPv6移动性管理机制。该机制根据位置预测结果在移动发生前计算并下发切换路径流表,降低了移动节点在移动过程中的信令开销和切换时延。最后根据性能评估分析方法,与同样基于SDN实现的OPMIPv6-C方案在信令开销和切换时延两方面进行了比较。

SDN network idea provides a new solution to solve problems of network layer mobility management in traditional network. At present, the existing mobility management scheme based on SDN still faces the problems of large network o- verhead and prolonged handover delay in the process of user movement. This paper firstly researches the mobility manage- ment mechanism of IPv6 network layer based on SDN network. By analyzing and designing mobile perception and mobile handover, and combining with the theory of location prediction, an IPv6 mobility management mechanism based on SDN is proposed to support pre--handover. According to the position prediction result ,this mechanism calculates and downloads flow table before moving to reduce the signaling overhead and handover delay in the process of user movement. Finally, according to the method of performance evaluation analysis, we compare with the OPM IPv6-C scheme based on SDN in signaling handover and handover delay.