改进型GEO卫星BTDAMA MAC协议时延性能分析

Analysis on Delay Performance of Improved BTDMA MAC Protocol via GEO Satellite

比较了采用不同调度策略的宽带GEO卫星网络突发目标按需分配协议,提出了采用纯按需分配与预约按需分配相结合的BTDAMA-HD协议。采用具有自相似特性的Pareto ON/OFF信源进行计算机仿真,对纯按需分配(BTDAMA-PD)与BTDAMA-HD协议进行了比较。仿真结果表明,BTDAMA-HD具有更好的时延/吞吐量性能。

In this paper, the relative performances of the burst target demand assignment multiple access （BTDAMA） protocol with different schedule strategies are examined. A new satellite multiple access seheme employing hybrid demand assignment strategy （BTDAMA-HD） is proposed which is compared with BTDAMA-PD （pure demand assignment）. The delay performances between BTDAMA-PD and BTDAMA-HD scheme are compared by computer simulation. Simulations are carried out by Pareto ON/OFF traffic. The results demonstrate that BTDAMA-HD protocol can offer better delay/throughput performance of the satellite channel.