计算机应用 ›› 2015, Vol. 35 ›› Issue (1): 31-34.DOI: 10.11772/j.issn.1001-9081.2015.01.0031

• 网络与通信 • 上一篇    下一篇

基于多条件休眠的802.15.4网络能耗优化方法

程宏斌, 孙霞   

  1. 常熟理工学院 计算机科学与工程学院, 江苏 常熟215500
  • 收稿日期:2014-07-18 修回日期:2014-09-06 出版日期:2015-01-01 发布日期:2015-01-26
  • 通讯作者: 程宏斌
  • 作者简介:程宏斌(1975-),男,湖北黄冈人,副教授,硕士,主要研究方向:无线传感网络协议性能分析与优化;孙霞(1978-),女,河南周口人,副教授,硕士,主要研究方向:算法分析与设计.

Optimization method of energy consumption for 802.15.4 networks based on multi-condition sleep

CHENG Hongbin, SUN Xia   

  1. School of Computer Science and Engineering, Changshu Institute of Technology, Changshu Jiangsu 215500, China
  • Received:2014-07-18 Revised:2014-09-06 Online:2015-01-01 Published:2015-01-26

摘要:

针对802.15.4网络能耗优化问题,提出了一种基于多条件休眠模式的媒体接入控制(MAC)层信道接入机制.首先,建立该机制的马尔可夫模型;然后,基于模型对网络主要状态的稳态概率和协议参数进行推导;其次,分析了节点在每个超帧内的平均能耗;最后,研究了数据包到达率、退避次数、超帧指数和最小退避指数对节点主要状态的稳态概率、能耗和节点生存时间的影响.实验结果表明,与节点无休眠态的802.15.4网络相比,节点能耗降低了84.4%左右;与部分条件休眠的方法比较,节点能耗平均降低了62.8%,网络存活时间平均提高了70%.模型较好地描述了提出的网络信道接入机制,合理的网络参数设置能够优化网络能耗性能,也为无线传感器网络(WSN)的实际应用提供能耗优化参考.

关键词: 802.15.4网络, 媒体接入控制层, 建模, 多条件休眠, 能耗

Abstract:

Aiming at the problems of the energy consumption of 802.15.4 network, a channel access mechanism for Media Access Control (MAC) layer based on multi-condition sleep mode was proposed. First, a Markov model of the mechanism was established. Then, the mathematical derivation based on the model of the steady-state probability of the main state, related parameters were given out. Furthermore, the analysis of the node average energy consumption in superframe was carried out. At last, the influence of the protocol parameters such as arrival rate of packets, number of back, superframe order and mininum of backoff exponent to the steady-state probability of the main state, the average energy consumption and the survival time of node was researched. The experimental results show that, compared with 802.15.4 network without node sleep state, the node energy consumption is reduced by 84.4% or so. And compared with the methods of some conditions, node energy consumption is reduced by 62.8% on average; the average survival time of network is increased by 70%. The model describes the proposed channel access mechanism very well, and the reasonable settings for parameters can improve the performance of node energy consumption. It also provides reference for the energy optimization in the practical application of Wireless Sensor Network (WSN).

Key words: 802.15.4 network, Media Access Control (MAC) layer, modeling, multi-condition sleep, energy consumption

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