OLSR路由协议改进研究  

Research on Modified OLSR Protocol

作　　者：王振雷 李春风[1] WANG Zhenlei;LI Chunfeng(No.54 Institute of CETC,Shijiazhuang Hebei 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《通信技术》2023年第6期736-743,共8页Communications Technology

基　　金：国防基础科研计划(JCKY2020210B021)。

摘　　要：优化链路状态路由协议(Optimized Link State Routing,OLSR)是Ad Hoc网络中的一种先验式的链路状态路由协议,在该协议基础上,通过在HELLO消息中加入二跳邻节点信息进行一跳广播,节点能获取所有的二跳邻节点及三跳邻节点,从二跳邻节点中选出中继节点(称之为多点二级中继节点MPL2R)覆盖三级邻节点,再从一跳邻节点中选出中继节点(称之为一级中继节点MPL1R,即原来的MPR),MPL2R和MPL1R完成了对所有的二跳和三跳邻节点的覆盖。修改TC消息内容,并改进MPR节点选择算法。通过对OLSR路由协议的改进,增加了路由开销,但从全局看,最后计算出的路径更接近全局最优。OLSR(Optimized Link State Routing)protocol is a preemptive link-state routing protocol in Ad Hoc networks.On the basis of this protocol,by adding information of the two-hop neighbor node to the HELLO message for one-hop broadcasting,the node can know all two-hop neighbor nodes and three-hop neighbor nodes,and select the relay node(called multi-point secondary relay node,MPL2R)from the two-hop neighbor nodes to cover the third-level neighbor nodes,and then select the relay node from the one-hop neighbor nodes(called the first-level relay node MPL1R,i.e.,the original MPR),and MPL2R and MPL1R complete the coverage of all two-hop and three-hop neighbor nodes.This paper modifies the TC messages and improves the MPR node selection algorithm.Improvements to the OLSR protocol increase the routing cost,but from a global perspective,the final computed path is closer to the global optimization.

关 键 词：链路状态路由协议 多点中继节点 多点一级中继节点 多点二级中继节点 

分 类 号：TN92[电子电信—通信与信息系统]