摘要
静态无线传感器网络(所有节点均为静止)不可避免地存在能量空洞(energy hole)、冗余覆盖(overlap)和热点(hot spot)等问题.在无线传感器网络中引入节点的移动性来解决上述问题.移动节点可以完成数据收集和转发等功能,有效地减少静态节点数据传输的跳数,节约静态节点的能量,延长网络的寿命.实现了一个基于ARM7内核的移动汇点DataTruck,具有容量大、速度快等特点.在此基础上引入SDMA(space-division multiple access)技术,在移动汇点上加入智能天线,使得该节点能同时接收同一频率上多个静态节点传输的数据.实验表明基于SDMA技术的移动汇点能高效地收集数据,并减少数据延时.
Recent years have witnessed a surge of Interest in efficient data collection schemas in wireless sensor networks（WSNs）.However,there are some serious problems existing in static wireless sensor networks such as energy hole,overlapping and hot spots,etc.An efficient method to solve these problems is using mobile nodes.Through data collection and relaying,mobile nodes can reduce the data of transmitting between the static nodes.It also conserve the power of static nodes and therefore can prolong the lifetime of network.In this paper,we introduce the design and implementation of a mobile sink node based on ARM7 core chip,named DataTruck,which has a large storage and rapid speed.Furthermore,we integrate a smart antenna system to collect the data from multiple static nodes concurrently which use the same frequency.We consider applying space-division multiple access（SDMA） technique to data gathering by equipping the DataTruck with two antennas.With SDMA,two distinct compatible sensors may successfully make concurrent data uploading to the DataTruck.Experiments show that DataTruck can collect data efficiently and reduce the average data delay by using SDMA technology.
出处
《计算机研究与发展》
EI
CSCD
北大核心
2012年第3期541-549,共9页
Journal of Computer Research and Development
基金
国家自然科学基金项目(60573131
60673154
60721002
60825205)
国家"九七三"重点基础研究计划基金项目(2006CB303000)
中央高校基本科研业务费专项(2009B21514)
河海大学自然科学基金项目(2009424211)
关键词
无线传感器网络
移动汇点
空分复用
智能天线
兼容性
wireless sensor networks（WSNs）
mobile sink
space-division multiple access（SDMA）
smart antenna
compatibility
