无线Mesh网中一种基于MPR当选频度的OLSR扩展路由协议

在研究无线Mesh网拓扑结构和业务模式的基础上,深度剖析适合其特性的路由协议类型,得出先验式的逐跳路由最适合无线Mesh网的结论.在此基础上,以典型的先验式逐跳路由协议OLSR(Optimized Link State Routing)为原型,对其中的邻居表结构和MPR(Multipoint Relay)选择算法进行了改进,通过引入"MPR当选频度"的概念,克服了OLSR协议在无线Mesh网环境中资源利用不充分的缺陷.仿真实验的结果也验证了所提出的EOLSR协议对网络性能确实有较大程度的提升,能够在基本不增加协议开销的前提下,有效地增加网络吞吐量,降低端到端的平均延时.

MPR Election Frequency Based Extended OLSR Protocol in Wireless Mesh Networks

Based on studying the characteristics of topology and business model of wireless mesh networks, depth analysis of the suitable routing protocol type for WMN was given out which shows that proactive hop-by-hop routing is most suitable for WMN. On the basis of Optimized Link State Routing which is a typical proactive hop-by-hop routing protocola MPR election frequency based routing protocol called EOLSR was proposed for Wireless Mesh Networks. EOLSR takes in the new concept of "MPR election frequency" and overcomes the defect of inadequate resource utilization of OLSR in Wireless Mesh Network environment by expanding the neighbor table structure and improving the MPR seleclion algorithm. The simulation results show that the proposed EOLSR protocol improves the network throughput and reduces the end-to-end delay without increasing the routing overhead.