分簇无线传感器网络的双时槽混合MAC协议  

A cluster oriented hybrid MAC with dual slots for wireless sensor networks

作　　者：钱德沛[1] 李世晗[1] 刘轶[1] 杜治高[1] 

机构地区：[1]北京航空航天大学中德联合软件研究所,北京100083

出　　处：《高技术通讯》2009年第5期441-445,共5页Chinese High Technology Letters

基　　金：国家自然科学基金(60673180);德国教研部资助;eeWSN(MCI)项目资助

摘　　要：基于事件驱动的无线传感器网络应用,提出了一个基于分簇优化的低时延混合MAC协议——CHMAC。 CHMAC采用双时槽传输调度和载波检测多路接入/时分多址接入(CSMA/TDMA)混合模式,采用适合分簇网络的时槽分配,优先保证紧急事件的最小延迟发送,并充分利用分簇网络的数据流特点,精细控制节点的侦听、睡眠以及传输功率,以提高能量有效性和网络吞吐量。理论分析和模拟试验表明,该协议能够以良好的适应性和健壮性在各种流量条件下均表现良好的性能。The CHMAC, a cluster oriented hybrid media access control （MAC） protocol, constructed using the carrier sense multiple access （CSMA）/time division multiple access （TDMA） hybrid approach, is presented for event-driven wireless sensor network applications. To improve the performance of throughput and the energy efficiency, especially the delay performance for urgent event, a channel access mechanism of two types of slots is presented. Slot assignment fitting for such kind of networks is adopted. Traffic characteristics are also utilized to control listening and sleeping and transmission power of sensor nodes elaborately. The results of the analysis and simulation show that the proposed CHMAC has good performance and exhibits good adaptability and robustness in different traffic conditions.

关 键 词：无线传感器网络 媒体接入控制(MAC) 载波检测多路接入(CSMA) 分时多址 接入(TDMA) 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置] TN915.04[自动化与计算机技术—控制科学与工程]