适用于ad hoc网络的DCF协议节点自适应休眠机制  

Node adaptive sleeping mechanism of DCF protocol in ad hoc networks

作　　者：雷磊[1] 许宗泽[1] 刘旭[1] 

机构地区：[1]南京航空航天大学信息科学与技术学院,江苏南京210016

出　　处：《通信学报》2009年第10期14-23,共10页Journal on Communications

基　　金：航空科学基金资助项目(20090152001);南京航空航天大学科研启动基金资助项目(S0918-042);江苏省高校自然科学研究基金资助项目(09KJB520007)~~

摘　　要：针对现有的ad hoc网络节点休眠机制大多采用了周期唤醒/预约发送休眠策略的现状,首先详细分析了这种休眠策略存在的缺陷,然后在DCF协议的框架内提出了一种同时适用于单跳和多跳ad hoc网络的节点自适应休眠机制(NASM)。该休眠机制不依赖于周期唤醒/预约发送的休眠策略,它允许节点根据各自的通信状况,自适应调整休眠时间的长度。仿真证明,NASM在有效节省节点能耗的同时并不会严重影响网络的其他性能指标。Most of the existing node sleeping mechanisms in ad hoc networks adopt the PAJRT （periodically awake with reserve transmission） strategy, however, this strategy has some shortcomings. To overcome these shortcomings, a node adaptive sleeping mechanism （NASM） of DCF protocol was presented which can be used on both single-hop and multi-hop ad hoc networks. This sleeping mechanism does not rely on the PA/RT stratcgy, and pcrmits the node to adaptively adjust the length of sleeping time according to the communication status of the nodes. The simulation results show that NASM can effectively save the average energy consumption of the nodes without significantly impairing the other performance indexes of the network.

关 键 词：AD HOC网络 DCF协议 休眠机制 自适应 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]