面向实时监测无线传感网络应用的通信协议  

An improved communication protocol for real-time monitoring in WSN

作　　者：周桃云[1] 梁平元[1] 成运[1] 张怡[2] 

机构地区：[1]湖南人文科技学院,湖南娄底417000 [2]西北工业大学,西安710072

出　　处：《测绘科学》2016年第9期181-185,共5页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(61377079;61571188);湖南省自然科学基金项目(12JJ2040);湖南省重点学科建设项目;娄底市科技计划项目;湖南省高校科技创新团队支持计划资助项目

摘　　要：针对WSN中虚拟MIMO传输的能量节省与均衡问题,该文提出了一种新的自适应MAC信道接入协议,该协议在每个数据包的基础上,同时调节传输方式、传输功率和调制阶数,使包括传输功耗和电路功耗的总能耗最小;分析了MAC协议中的平均误码率及信噪比与调制阶数的关系及2-天线协作MIMO传输与SISO传输的平均能耗;讨论了STC与LTC距离的取值范围,确定了相对于传统SISO节省能量的下边界距离。最后,仿真验证了A-MAC协议能有效降低网络能耗,同时吞吐量性能也得到了一定的改善,在数据采集及环境测量等方面具有一定的应用价值。Wireless sensor networks can be widely used in a variety of fields such as data acquisition and measurement. Firstly, to solve the problems of energy savings and balance existing in virtual MIMO in WSN, a new A-MAC channel access protocol is proposed in which the transmission mode, transmission power and modulation order can be adjusted adaptively at the same time basing on each packet, and the total energy consumption including transmission power and circuit power are minimized. Secondly, the average bit error rate, the relationship between the signal to noise ratio and modulation order and the average energy consumption of 2-antenna cooperative MIMO transmission and SISO transmission of A-MAC are analyzed. Thirdly, the distance range of STC and LTC are discussed and the under-boundary distance saving more energy compared with the traditional SISO are determined. Finally, the validity and reasonable- ness of this protocol are verified by the simulations, which can be used in data collection and environmental measurements.

关 键 词：无线传感网络 MAC协议 平均能耗 虚拟多输入多输出 

分 类 号：P228[天文地球—大地测量学与测量工程]