[1]何敏,赵东风,保利勇,等.一种能量有效的无线传感器网络轮询接入控制协议[J].智能系统学报,2012,7(3):265-270.
　HE Min,ZHAO Dongfeng,BAO Liyong,et al.An energyefficiency polling access control protocol for wireless sensor networks[J].CAAI Transactions on Intelligent Systems,2012,7(3):265-270.
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一种能量有效的无线传感器网络轮询接入控制协议

《智能系统学报》[ISSN 1673-4785/CN 23-1538/TP] 卷: 7 期数: 2012年第3期 页码: 265-270 栏目: 学术论文—智能系统 出版日期: 2012-06-25
Title:
An energyefficiency polling access control protocol for wireless sensor networks
文章编号:
1673-4785(2012)03-0265-06
作者:
何敏1，赵东风1，保利勇1，左朝树2
1.云南大学 信息学院，云南 昆明 650091；
2.西南通信研究所 保密通信重点实验室，四川 成都 610041
Author(s):
HE Min1, ZHAO Dongfeng1, BAO Liyong1, ZUO Chaoshu2
1.School of Information Science and Engineering, Yunnan University, Kunming 650091, China;
2.Science and Technology on Communication Security Laboratory, Southwest Institute of Communication, Chengdu 610041, China
关键词:
无线传感器网络; PCF; 能量有效; 轮询服务; 接入控制; 轮询接入控制
Keywords:
wireless sensor networks (WSN);  point coordination function (PCF);  energy efficiency;  polling service;  access control;  polling access controll
分类号:
TP393
文献标志码:
A
摘要:
周期性休眠的PCF机制虽然较好地解决了无线传感器网络的能耗问题，但没有考虑节点的负载状态，降低了系统性能，也增加了系统的查询能耗.以限定（K=1）服务为基础，提出了一种改进的PCF轮询控制协议，即具有混合服务策略的无线传感器网络轮询接入控制协议PCFSS.该协议在保障公平性的前提下，能够根据节点状态动态调整优先级并改变服务K值，中心服务器AP则根据各节点的服务K值在每轮服务时对节点的下一轮服务时间进行预估计，并采用统一的服务时间表唤醒节点，达到节能的效果.仿真实验表明系统的平均等待时间、平均排队队长等性能指标比周期性休眠的PCF机制要好，能量的有效利用率更高，具有更长的生命周期，适合作为无线传感器网络的MAC控制协议.
Abstract:
Although the energy waste is well controlled on the medium access control (MAC) layer under the periodic sleeping point coordination function (PCF) scheme in wireless sensor networks (WSN), the system performance declined and the system query energy cost increased because the node loads were ignored. Based on the limited service (K=1), an improved PCF polling control protocol, which is known as the point coordination function by the site status (PCFSS) for WSN, was proposed. The priority of a node was variable by its status and the service K was correspondingly changed using this protocol. Therefore, the service time of the next turn could be assigned dynamically according to its status when the AP server came to service a node. Also, the nodes were awakened by a uniform service time table which was used to save their power. The experimental results indicate that the performances, such as the mean value of queue length and message waiting time, are better than when using the periodic sleeping PCF scheme. The energy usage is more efficient and the lifecycle is longer, making it suitable for the MAC protocol of WSN. 
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备注/Memo

收稿日期： 2011-10-11.网络出版日期：2012-05-18.
基金项目：国家自然科学基金资助项目(61072079)；云南省教育厅科学研究基金资助项目(09y0042).
通信作者：何敏．E-mail: heather_hee@163.com.
作者简介：
何敏，女，1975年生，副教授，博士，主要研究方向为计算机网络与通信、轮询系统理论、嵌入式应用等.
赵东风，男，1957年生，教授，博士生导师，中国电子学会高级会员，教育部电子电气基础课程教学指导委员会委员，云南省省级重点学科“信息工程与技术”学科带头人.主要研究方向为通信网络理论、传感器网络、电磁环境评估、网络系统仿真、机器人控制等.主持多项国家自然科学基金项目和国防军工项目，发表学术论文200余篇，被SCI、EI和ISTP检索40余篇.
保利勇，男，1975年生，副教授，博士，主要研究方向为计算机通信与网络、轮询系统理论.

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