宽带城域网中节能机能I的性能分析  

Performance analysis for power saving class of type I in broadband MAN

作　　者：张丽媛[1] 李博光[2] 金顺福[2] 霍占强[3] 

机构地区：[1]廊坊师范学院,河北廊坊065000 [2]燕山大学信息科学与工程学院,河北秦皇岛066004 [3]河南理工大学,河南焦作454003

出　　处：《计算机工程与应用》2011年第15期126-129,205,共5页Computer Engineering and Applications

基　　金：河北省自然科学基金No.F200900475~~

摘　　要：在移动宽带城域网中,如何获得更好的节能效果是移动设备面临的重要问题之一,IEEE802.16e标准中提出称为休眠模式的节能机制。基于带有休眠延迟的节能类型I,建立带有休假延迟且休假长度指数变化的多重休假排队模型。通过嵌入Mar-kov链方法及边界状态变体定理,对排队模型进行了分析,给出了系统切换率、能量节省率和平均响应时间等性能指标的解析表达式。通过理论分析和仿真实验刻画了不同系统负载下,系统性能指标与休眠延迟定时器长度的依赖关系。综合不同性能指标,构造成本函数,给出系统参数的优化设置方案。In mobile broadband MAN, how to control energy consumption is one of the most important issues for mobile stations.IEEE 802.16e proposes an energy saving mechanism named as sleep mode for mobile stations.Based on power saving class of type I with sleep-delay, a queuing model with multiple exponential vacations and a sleep-delay is built.By em- ploying an embedded Markov chain method and boundary state variable theory, the queuing model is analyzed, and the expressions for the performance measures in terms of handover ratio, energy saving ratio and average response time for the power saving class of type I are presented.In numerical results,the dependency relationships are investigated between the system performance measures and the length of the sleep-delay timer for different system loads.Furthermore, a cost function is built considering all the performance measures,and an optimal design proposal for setting the system parameters is given.

关 键 词：IEEE802.16E 节能类型I 休眠模式 休眠延迟 休假排队 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]