摘要
在下一代异构网络环境中为移动用户提供无缝切换以及更优的体验质量是人们面临的一大挑战。尽管FMIPv6一定程度上减小了切换的时延,但还是存在切换发起时延过大,以及无法满足垂直切换的需求等缺点。提出了一种基于IEEE 802.21 MIH(与介质无关切换)服务的FMIPv6改进机制。利用MIH信息服务优化了接入路由发现以及接入点(AP)发现过程。利用MIH事件服务优化了FMIPv6的切换过程。通过性能分析可以发现,改进机制减小了切换发起时间增加了预应式切换的可能性,减小了AP发现时间,同时也减小了切换时延。
How to accomplish fast and seamless handover,and how to guarantee the users a seamless experiences in the heterogeneous networks are the critical challenges we＇re facing.Although Fast Mobile IPv6 reduces the long handover delay, it has some constraints.Propose an enhanced FMIPv6 based on IEEE802.21 MIH services.Use the information service provided by MIH function to optimize the access router discovery and access point discovery.Also use MIH event service to optimize the handover of FMIPv6.Through the analysis we present in the paper,can see that when our proposed mechanism is applied,it increases the probability of predictive mode of operation and reduces the overall expected handover latency in FMIPv6.
出处
《计算机技术与发展》
2010年第7期132-135,148,共5页
Computer Technology and Development
基金
江苏省高新技术研究计划(BG2003001)
