无线局域网中周期查询控制系统分析

Analysis of Polling Systems Based on Wireless LANs

通过对无线局域网 80 2 .11协议中满足时限业务需要的周期查询控制方式进行分析 ,对周期查询系统的调度策略做了改进 ,将传输服务与转移查询做了并行处理 ,基于连续时间型系统分析了平均排队队长和平均等待时间 ,并结合无线局域网上多业务应用 。

This paper analyzes the polling systems defined in the 802.11 to transmit delay sensitive data and proposes a policy of parallel schedule for a polling system with limited service (K=1) in continuous time. The system enables simultaneous polling and transmissions of information packets. By the imbedded Markov chain theory and the generation function method, the mean values of queue length and information packed waiting time are explicitly obtained based on the different traffic in WLAN. Mathematical analysis and simulation results show that the parallel schedules are more efficient.