一种基于期望传输时间的多径OLSR路由协议

A Multipath OLSR Routing Protocol Based on Expected Transmission Time

现有多径OLSR协议采用跳数作为路由度量,没有考虑链路中的丢包、带宽等因素。为此,提出一种基于期望传输时间(ETT)的多径OLSR路由协议。计算节点间链路的期望传输次数值和带宽值后进行路由选择,将ETT值作为路由度量。同时,为避免路径上的链路ETT值相差较大影响整条链路的稳定性,设计一种优化评判因子。仿真结果表明,相对ETT_MPOLSR、MPOLSR、OLSR协议,该协议能够提升网络吞吐量,提高分组投递率,降低平均端到端时延。

The existing multipath Optimized Link State Routing(OLSR)protocols use hops as routing metric,without considering packet loss,bandwidth and other factors in the link.To solve this problem,a multipath OLSR routing protocol based on Expected Transmission Time(ETT)is proposed.After calculating the expected transmission count and bandwidth values of the inter-node links,the routing choice is made,and the ETT value is taken as the routing metric.At the same time,in order to avoid the great difference of the ETT value of the link on the path affecting the stability of the whole link,an optimization evaluation factor is proposed.Simulation results show that compared with ETT_MPOLSR,MPOLSR and OLSR protocol,this protocol can improve network throughput,packet delivery rate and reduce average end-to-end delay.