双向链路下IEEE802.16e中节能类型III的性能分析  

Performance evaluation of power saving class of type III in IEEE 802.16e with duplex links

作　　者：闫学娜[1] 金顺福[1] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004

出　　处：《计算机工程与设计》2011年第1期89-91,95,共4页Computer Engineering and Design

基　　金：河北省自然科学基金项目(F2009000475)

摘　　要：为了有效地节省移动终端(mobile station,MS)的能量消耗,延长无线城域网中MS的生命期,综合考虑了IEEE 802.16e节能类型III的双向链路,将上行链路抽象为一个服务台,下行链路抽象为另一个服务台,将休眠状态和侦听状态抽象为休假期,建立了一个两服务台同步休假的多重休假排队系统。应用半马尔可夫过程方法,导出了排队系统的稳态分布。给出了IEEE 802.16e节能类型III中上/下链路数据帧的平均延时和能量节省率等性能指标的表达式,并通过数值例子定量刻画了系统参数对系统性能的影响。To conserve the power consumption of mobile station effectively and extend the lifetime of the wireless metropolitan area network, taking into account duplex links in IEEE 802.16e,the uplink is regarded as one server,the downlink as anther server,the sleep mode and listen mode as vacation periods,then a queuing model with synchronous multiple vacation is built.Using the method of semiMarkov process,the steady-state probability distribution of the system is obtained.Correspondingly,the delay for both the uplink and the downlink traffics,and also the system power saving ratio for the power saving class of type III in IEEE 802.16e are given.Numerical results are provided to demonstrate the influence of the system parameters on the system performance mathematically.

关 键 词：IEEE802.16E 节能类型III 休假排队模型 双向链路 性能指标 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]