一种高信道利用率的无人机自组网单阈值接入协议

A Single Threshold Access Protocol for UAV Ad-Hoc Network with High Channel Utilization Rate

为解决现有无人机自组网MAC层接入协议信道负载统计时间不统一导致负载统计结果存在误差和信道资源利用率降低的问题,提出一种多优先级单阈值接入控制(MSAC)协议。通过设计信道负载统计时间校正机制和基于单阈值的信道接入控制机制,实现更精准的信道负载统计和以数据包为单位的负载控制,使系统信道承载能力与实际信道负载相匹配,最大化利用信道资源。仿真结果表明,MSAC协议可在保证较高信道资源利用率的同时,提升信道重载情况下的数据传输成功率和MAC层吞吐量。

The access protocol of the MAC layer in the existing UAV Ad-Hoc Network(UANET)is faced with errors in load estimation results and the low channel resource utilization,for the estimation time of channel loads is not uniform.To address the problem,this paper proposes a Multi-priority Single threshold Access Control(MSAC)protocol.A correction mechanism for the estimation time of channel loads and a single threshold-based mechanism for channel access control are designed for the protocol to realize more accurate channel load estimation and packet-level load control.So the system capacity of channels can match the actual channel loads to maximize the utilization of channel resources. Simulation results show that MSAC protocol can improve the data transmission success rate and the MAC layer throughput under heavy channel loads while ensuring higher channel resource utilization rate.