基于移动节点在PAR和NAR间频繁切换的预测式快速移动IPv6新方案

针对移动节点频繁地在PAR和NAR间频繁切换时,现有的预测式FMIPv6存在着时延大、丢包率高、信令冗余大等问题,本文提出了一种新的解决方案.该方案定义了新的Hop-by－Hop 选项报头TM (Tunneling Message)、 PCoA表和双向隧道表,并将TM捎带在NAR向PAR发送的最后一分组数据包的确认中,告知PAR,MN不久将会移回PAR域,以便PAR提前准备好其与NAR之间以前建立好的双向隧道,从而达到MN的快速和平滑切换.理论分析表明,该方案能有效地减少切换时延、丢包率及信令冗余等问题,提高移动用户的QoS.

Novel Scheme Based on Mobile Node Hands Over Frequently between PAR and NAR for Predictive Fast Handovers for Mobile IPv6

A novel scheme based on mobile node handovers frequently between PAR and NAR for predictive fast handovers for mobile IPv6 was proposed to solve the problems of long latency, high lost packets and excessive signaling redundancy in existing schemes. A new Hop-by-Hop option header named TM,PCoA table and tunneling table were defined in this paper. TM is put in the acknowledgement of the last data packets between NAR and PAR,telling PAR that MN will be back to the domain of PAR in the near future, and hoping that the previous bidirectional tunneling between PAR and NAR is available. Theory analysis shows that this scheme would be viewed as an effective method to solve the above problems and can improve the Quality of Service for mobile users.