基于TDMA的空中自组网MAC层资源调度算法研究

Research on MAC Layer Resource Scheduling Algorithm of Air Mobile Ad Hoc Network Based on TDMA

空中移动无线自组织网络是一种拓扑结构快速变化,有自组织性的多跳无中心网络;针对传统时隙分配算法资源利用率低、吞吐量不足、通信距离近等问题,采用引入分配系数的混合时隙分配模式,通过节点业务优先级和流量预测相结合,设计了一种基于TDMA定向分布式资源动态调度算法(M-TDMA);对比分析了节点数量、传输速率、分配系数以及不同拓扑等多个维度对算法传输时延、吞吐量以及丢包率的影响;最后通过仿真实验对资源调度算法进行验证;仿真结果表明,在20个网络节点时,网络的最大传输时延小于600 ms,网络吞吐量可以达到4.5 Mbps以上,M-TDMA算法通过高效的资源调度,有效降低了网络传输时延并提高了网络吞吐量。

Air wireless mobile Ad hoc network(MANET)is a multi-hop centerless network with rapidly changing topology and self-organization.Aiming at the problems of low resource utilization,insufficient throughput and short communication distance of traditional time-slot allocation algorithm,an orientation distribution resource dynamic scheduling algorithm(M-TDMA)based on time division multiple access(TDMA)is proposed by combining the node service priority and traffic prediction and introducing the distribution coefficient to the hybrid time-slot allocation mode.The effects of multiple dimensions such as the number of nodes,transmission rate,distribution coefficient and different topologies on the transmission delay,throughput,and packet loss rate are compared and analyzed.Finally,the resource scheduling algorithm is verified by the simulation experiment.The simulation results show that when there are 20 network nodes,the maximum transmission delay of the network is less than 600 ms,and the network throughput can reach more than 4.5 Mbps.The M-TDMA algorithm can effectively reduce the network transmission delay and improve the network throughput through the efficient resource scheduling.