水声传感器网络中基于改进时分多址技术的MAC协议  

W-MAC:a MAC protocol with modified time division multiple access for underwater acoustic sensor networks

作　　者：熊鹏[1] 

机构地区：[1]上海电机学院电子信息学院,上海200240

出　　处：《计算机应用》2011年第11期2902-2904,2908,共4页journal of Computer Applications

基　　金：上海市电机学院重点建设学科项目(XKJ0701)

摘　　要：海洋信道信号传输条件恶劣,水声传感器网络(UASN)的媒体访问控制协议(MAC)要能可靠且有效的工作面临极大的挑战。针对水下分组转发高传输延时和延时的起伏特性,提出了一个利用改进时分多址技术的媒体访问控制协议(W-MAC)。W-MAC通过简化的信号传输同步过程,利用"延缓时间"作为节点的实际数据传送时间,采用具有睡眠策略的监测时间来避免数据碰撞等一系列措施,使W-MAC协议在适应复杂的水下信号传送环境的同时,把能量开销限制在一个合理的水平。仿真实验表明,在水声信道条件下该协议可有效地改善网络性能。Signal transmission conditions are very poor for ocean channel.It is a great challenge for Media Access Control（MAC） protocol to work reliably and effectively in Underwater Acoustic Sensor Networks（UASN）.Due to the long and changeful propagation delay,a new MAC with modified TDMA named W-MAC was proposed,which could adapt underwater environment through simplified synchronization process,the defer time to allocate transmitting of all nodes as well as the detection time with sleep scheme to prevent from data collision to decrease the overhead of energy.The simulation results show W-MAC is quite efficient when data traffic is high in underwater acoustic sensor network.

关 键 词：水声传感器网络 时分多址 媒体访问控制协议 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]