现代电子技术2013，Vol.36Issue(1)：32-35,4.
无线传感器网络SMAC协议的研究与改进
Study and improvement of SMAC protocol for wireless sensor networks
摘要
Abstract
Media access control (MAC) protocol is one of the key protocols to ensure efficient communication network. SMAC protocol, a kind of MAC protocol, is proposed for the purpose of energy saving. This paper describes the working princi-ple of SMAC protocol. For the defect of back-off mechanism in SMAC protocol, the paper takes binary exponential backoff algo-rithm as reference and introduces a fair backoff mechanism based on the SMAC protocol. Node adjusts the contention window dy-namically according to the number of accessing the channel. When backoff is failed, node freezes the backoff timer and continues to count at the next competitive cycle time. This algorithm increases the fairness of node accessing the channel, reduces the col-lision and increases the throughput and the channel utilization. Finally, the simulation results show that the new scheme signifi-cantly improves throughput, energy consumption and energy efficiency compared with the original protocol SMAC and reduces the energy cost.关键词
无线传感器网络/SMAC协议/竞争窗口/退避算法Key words
wireless sensor networks/SMAC protocol/contention window/backoff algorithm分类
信息技术与安全科学引用本文复制引用
王鑫,朱国晖,王莎莎..无线传感器网络SMAC协议的研究与改进[J].现代电子技术,2013,36(1):32-35,4.基金项目
国家自然科学基金资助项目(60872058) （60872058）
陕西省教育厅项目(07JK377) （07JK377）
