基于动态中继选择的无人机自组网协作接入协议

Cooperative Access Protocol for UAV Ad-hoc Network Based on Dynamic Relay Selection

对无人机自组织网络中的协作机制进行了研究,提出一种基于动态中继选择的无人机自组网协作时分信道接入协议。该协议在传输中继数据包时引入了双队列协作机制,在网络层数据包缓存队列之外引入了独立的媒体接入控制(Media access control,MAC)层中继数据包缓存队列,并且能够实现默认中继节点与辅助中继节点的动态选择,以满足大流量负载及网络拓扑快速变化的要求。仿真结果表明,通过中继节点动态选择机制,在网络业务流量负载较大、网络拓扑快速变化的情况下,所提出的协作时分信道接入协议可获得比传统时分多址(Time division multiple access,TDMA)协议与机会协作中继时分多址(Opportunistic cooperative relay time division multiple access,OCR-TDMA)协议更高的中继数据包投递率及更低的端到端时延。

The cooperation mechanism in unmanned aerial vehicle(UAV)ad-hoc network is studied.A cooperative time division multiple access(TDMA)protocol for UAV ad-hoc network based on dynamic relay selection is proposed.The protocol introduces the dual-queue cooperation mechanism when transmitting the relay packets,an independent media access control(MAC)layer relay packet buffer queue is introduced in addition to the network layer packet buffer queue.The protocol can also realize the dynamic selection of the default relay node and the helper relay node,so as to adapt to the heavy traffic load and the rapid change of network topology.The simulation results show that the through the dynamic selection mechanism of the relay node,the proposed cooperative TDMA protocol can obtain higher packet delivery rate and lower end-to-end delay than the traditional TDMA protocol and opportunistic cooperative relay time division multiple access(OCR-TDMA)protocol,when the network traffic load is heavy and the topology changes rapidly.