移动自组网AOMDV协议应对衰落改进方案

在移动自组网中,信道条件直接决定了数据包传输的可靠性.为有效应对信道衰落,提出一种基于信道状态、可实时监控链路的路由方案来改进AOMDV协议.该方案在路由寻找过程中,以信道平均无衰时间（ANFD）作为路由度量来选择稳定的链路,并采用一种根据信道状态信息抢先切换的策略来维护连接的可靠性.仿真结果表明,通过该改进方案,AOMDV协议在网络吞吐量、平均端到端时延、路由控制开销和数据包投递率等性能上均有改善.

Improved scheme of AOMDV protocol coping with fading in mobile Ad Hoc network

Channel conditions directly determine the reliability of packet transmission m me mooue ha Hoc network. In order to cope with the fading of channel effectively, a routing scheme which is based on channel state and can be real-time monitoring links is proposed to improve AOMDV protocol. The scheme uses the channel average nonfading duration （ANFD） as a routing metric to select stable links for path discovery, and applies a preemptive handoff strategy to maintain the reliability of connections according to channel state information. The simulation results show that the network performance of the AOMDV protocol, including network throughput, average end-to-end delay, routing control overhead and packets delivery ratio, is improved though the scheme.