无线传感器网络轮询系统分析研究

Analysis and research of wireless sensor network polling system

基于提高轮询控制系统时延性能的网络需求和系统工作效率角度出发,以离散时间限定（K=1）轮询控制系统为基础,提出了离散时间限定（K=2）轮询控制系统,既每次发送服务终端中存储的2个信息分组。采用嵌入式马尔科夫链和概率母函数的方法建立了该轮询控制系统的数学模型,并对其求一阶与二阶偏导,精确解析出了系统平均排队队长和平均时延等重要特性参数。以MATLAB 2014a为仿真平台,仿真实验结果与理论计算的对比验证了理论分析的正确性。与限定（K=1）轮询控制系统相比,具有更好的时延性能,为时延要求较高的无线终端网络业务提供了稳定可靠的保障。

Based on the network requirements for increasing the delay performance of the polling control system and the system work efficiency,based on the discrete time limit（K=1）polling control system,the discrete time limit（K=2）polling control system is proposed,each time it sends two information packets stored in the service terminal.The mathematical model of the polling control system was established using the embedded Markov chain and probability mother function method,and seek first-order and second-order partial derivatives,the important characteristic parameters such as average queue length and average delay are analyzed.With MATLAB 2014 aas the simulation platform,the comparison between simulation results and theoretical calculations verifies the correctness of the theoretical analysis.Compared to the limited（K=1）polling control system,with better delay performance,provides stable and reliable protection for wireless terminal network services with high latency requirements.