一种无线Ad hoc网络MAC协议优化算法

MAC protocol optimization algorithm of wireless Ad hoc networks

通过对IEEE 802.11DCF中最优最小竞争窗口的分析,推导出最小竞争窗口的自适应调整公式,并给出一种估计网络竞争站点数目的算法,即S-DCF。将以上两点改进应用于无线Ad hoc网络MAC协议。仿真结果表明,这种自适应优化算法对无线Ad hoc网络有足够的精度和有效性,在系统饱和情况下,优化之后的系统吞吐量、系统时延和系统丢比特率均有明显改善。

Based on the analysis of the minimum contention window of IEEE802.11 DCF,this paper introduced a formula of adjusting the minimum contention window,and proposed a simple but accurate algorithm,S-DCF,to estimate the number of competing terminals.Applying these improvements to Ad hoc networks,the simulation results show that this algorithm is accurate and effective.The system throughput,delay,and bit-drop-rate are all improved significantly.