基于优先级的无线局域网能量节省机制  

Priority based power saving mechanism for wireless local area networks

作　　者：朱凡[1] 牛志升[1] 

机构地区：[1]清华大学电子工程系,清华信息科学与技术国家实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2010年第12期1999-2002,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家“九七三”重点基础研究发展计划项目(2007CB310607)

摘　　要：IEEE 802.11系列无线局域网为具有能量节省需求的终端提供了基于休眠的能量节省机制。根据是否具有能量节省需求,终端可分为应用该机制的终端(休眠终端)和不应用该机制的终端(普通终端)两类。普通终端与休眠终端间的信道竞争对休眠终端的能量节省效果具有重要的影响。该文提出了一种基于优先级的能量节省机制。该机制基于IEEE 802.11e协议,通过为休眠终端和普通终端设置不同的竞争退避窗口来提升休眠终端的信道竞争能力,从而达到优先级差分。分析和仿真结果表明该机制可以有效地提升休眠终端的能量节省效果。IEEE 802.11 series wireless local area networks provide a sleep-based power saving mechanism for terminals.Thus,terminals can be classified as those in the power saving mode（sleeping terminals） and terminals not using the power saving mechanism（normal terminals）.The contention between normal terminals and sleeping terminals has an important effect on the energy saving performance of sleeping terminals.This paper presents a priority based power saving mechanism,which can be realized with the IEEE 802.11e protocol.With this mechanism,sleeping terminals and normal terminals are assigned different channel contention windows,and hence,these two types of terminals have different channel contention capabilities.Analyses and simulations of the performance demonstrate the effectiveness of this mechanism.

关 键 词：能量节省机制 信道竞争 IEEE802.11E 

分 类 号：TN929.5[电子电信—通信与信息系统]