摘要
为了保证系统公平性不受损害,文中提出中心站点采用门限服务,普通站点采用并行调度完全服务的两级优先级轮询控制系统模型。通过马尔科夫链与概率母函数相结合的方法对模型的平均排队队长、平均等待时间等重要参数进行解析。经仿真得出,模拟仿真值与理论值误差较小,近似相等,表明模型理论分析合理正确。数值结果对比表明,模型区分网络业务高低优先级的性能优良,且普通站点工作效率得以提高,从而保证了系统公平性。
A two-level priority polling control system model with the central site using the threshold service,and the ordinary sites using the parallel scheduling full service is proposed in this paper to prevent the system′s fairness from damage. The method of combining the Markov chain with the probability generating function is adopted to analyze the model′s important parameters such as average queue length and average waiting time. The simulation results show that the simulation values have only small errors and are approximately equal to theoretical values,indicating that the theoretical analysis of the model is reasonable and correct. The comparison of the numerical results show that the model has a good performance in distinguishing the high and low priorities of network service,and the work efficiency of the ordinary sites is improved,which can ensure the fairness of the system.
作者
杨志军
孙洋洋
YANG Zhijun;SUN Yangyang(School of Information,Yunnan University,Kunming 650500,China;Yunnan Academy of Education Sciences,Kunming 650223,China)
出处
《现代电子技术》
北大核心
2019年第12期16-20,24,共6页
Modern Electronics Technique
基金
国家自然科学基金(61461054)
国家自然科学基金(61461053)~~
关键词
轮询控制系统
理论分析
门限服务
并行调度
平均排队队长
平均等待时间
polling control system
theoretical analysis
threshold service
parallel scheduling
average queue length
aver age waiting time
