一种应用于Ad Hoc无线局域网的预约多址协议

本文通过对Ad Hoc 无线局域网的预约多址（PRMA）控制方式进行了分析，即通过一个中央站点依次轮询各站点传输信息，采用嵌入Markov 链和概率母函数的分析方法，给出了轮询系统的数学模型。然后给出一种轮询调度策略的改进方法，将传输服务与转移查询做了并行处理，给出系统平均排队队长的精确解析，通过仿真实验讨论了改进方法对网络性能的提高。
关键词 Ad Hoc 网络；预约多址协议；轮询；平均排队队长

A Packet Reservation Multiple Access Protocol for Ad Hoc Wireless LANs YANG Zhi-jun1,3，XIE Ji-ping2， ZHAO Dong-feng3 (1. Information Center of Educational and Scientific Institute, Educational Department of Yunnan Province,Kunming 650223;2. Yunnan Radio & TV University，Kunming 650223,China; 3.Yunnan University, Kunming 650031,China) Abstract This paper analyzes the polling scheme in Ad Hoc wireless lans based on PRMA(Packet Reservation Multiple Access) and proposes a policy of parallel schedule for a polling system. 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. Mathematical analysis and simulation results show that the parallel schedules are more efficient.
Key words Ad Hoc Network, PRMA, Polling system, Mean queue length