基于OPNET的机群数据链混合TDMA协议仿真

OPNET Based Simulation of Hybrid TDMA Protocol for Helicopters Datalink

针对当前数据链的时隙分配问题,提出并实现了一种基于灰色关联分析法的混合时隙分配协议。通过灰色关联分析法对吞吐量、时延和当前报文缓冲区的负载程度做聚合,得到各节点综合得分,根据综合得分对时隙进行动态分配,同时采用固定时隙分配的方式保证网络中的节点最少有一个时隙可用。仿真结果表明:与固定TDMA(time division multiple access)协议和P-TDMA(priority-TDMA)协议相比,该协议在减少竞争冲突的同时,也保证了较低的时延、相对较高的吞吐量和高时隙利用率。

For the current time slot allocation problem of the data link,an improved hybrid time slot allocation protocol based on grey relational analysis is proposed and implemented.Through the aggregation of throughput,delay and load of current message buffer by grey relational analysis,the comprehensive evaluation index is obtained,and the time slot is allocated dynamically.The fixed time slot allocation is also adopted to ensure that at least one time slot is available for nodes in the network.Simulation results show that compared with the fixed TDMA(time division multiple access)protocol and the P-TDMA(priority-TDMA)protocol,the proposed protocol not only reduces contention conflicts,but also guarantees a lower delay,a relatively high throughput and a high time slot utilization rate.