基于分簇的拓扑自适应的无人机蜂群OLSR路由协议  

Cluster-based Topology Adaptive OLSR Protocol for UAV Swarm Network

作　　者：孙一凡 米志超 王海 赵宁[2] SUN Yi-fan;MI Zhi-chao;WANG Hai;ZHAO Ning(College of Communications Engineering,Army Engineering University of PLA,Nanjing 210007,China;The 28th Research Institute of China Electronics Technology Group Corporation,Nanjing 210007,China)

机构地区：[1]陆军工程大学通信工程学院,南京210007 [2]中国电子科技集团公司第二十八研究所,南京210007

出　　处：《计算机科学》2021年第6期268-275,共8页Computer Science

摘　　要：针对无人机群网络中的路由问题,优化链路状态路由协议采用固定周期的方式通告Hello和拓扑更新(TC)消息,用于维护网络拓扑信息。但是在网络结构频繁变化的情况下,这种周期性的通告不能对网络拓扑变化及时作出响应,网络性能会大幅衰减。文中提出一种新的基于簇群的OLSR路由协议(CB-OLSR),由簇内路由和簇间路由组成,分别采用簇内两跳短距离传输和高性能簇头间远程传输。簇成员不运行完整的路由协议,仅仅完成邻居节点检测,传递Hello消息即可。该协议根据网络拓扑变化情况动态调整Hello等控制消息的广播周期,及时更新网络状况,以提高网络性能,同时对簇内短直连路径进行优化。内部簇成员以及两域相邻簇成员间,如果源节点和目标节点是两跳以内的邻居,则忽略层次结构,使用"旁路捷径"直接转发消息,以减轻簇头的负载,延长簇头寿命。EXata仿真平台上的仿真实验表明,CB-OLSR在数据丢包率和吞吐量等方面明显优于OLSR,更适用于无人机蜂群网络。To address the routing problem in the UAV swarm network,the OLSR protocol announces Hello and Topology Update(TC)messages in the form of fixed period to maintain network topology information.However,in the case of frequent changes in network structure,such periodic announcements cannot respond to changes in the network topology in time,resulting in significant network performance degradation.This paper proposes a new cluster-based optimized link state routing protocol(CB-OLSR),which is composed of intra-cluster and inter-cluster routing.CB-OLSR dynamically adjusts the broadcast cycle of Hello and other control messages according to the network topology changes,so as to update the network status in time and obtain better network performance.At the same time,the short and direct connection path within the cluster is optimized.If the source node and target node are neighbors within two hops,the hierarchy structure is ignored and bypass shortcut is used to forward message directly,so as to reduce the load on the cluster head and extend its life.Through the simulation experiment on EXata simulation platform,the results show that CB-OLSR is significantly better than OLSR in terms of data packet loss rate and throughput,so it is more suitable for UAV swarm network.

关 键 词：无人机 OLSR 网络拓扑 周期 路由协议 

分 类 号：TN915.04[电子电信—通信与信息系统]