摘要
无线传感器网络(WSNs)是由大量节点自组织形成的多跳Mesh型网络系统,其在智能电网监测与控制中具有广泛的应用前景。由于多跳传输会导致延时的倍增,如何满足网络传输延时性能指标需求成为WSNs多跳传输研究领域的关键问题。为此,提出一种多跳无线传感器网络延时优化方法,通过分析IEEE802.15.4标准,基于马尔科夫链构建媒体访问控制(MAC)层传输延时模型,基于多队列理论建立网络层多跳传输延时模型,并以智能电网监控传输的实时性要求为约束,对WSNs多跳传输的延时进行优化研究与仿真验证。结果表明所提出的方法可以以延时上界为约束进行网络参数优化,并且可为智能电网中节点的采样速率设置及部署优化提供依据。
Wireless sensor networks(WSNs)is a multi-hop mesh network system formed by a large number of nodes.It has a wide application prospect in smart grid monitoring and control.Since multi-hop transmission will lead to the multiplication of delay,the way of meeting the performance requirements of network transmission delay becomes a key factor in the research field of WSNs multi-hop transmission.A delay optimization method for multi-hop wireless sensor networks is proposed.By analyzing the IEEE802.15.4 standard,a medium access control(MAC)layer transmission delay model is constructed based on Markov chain.The delay model of multi-hop transmission in network layer is established based on multi-queue theory.The delay of WSNs multi-hop transmission is optimized and verified by simulation,which is constrained by the real-time requirement of smart grid monitoring transmission.The results show that the proposed method can optimize the network parameters with the constraint of delay upper bound,and can provide the basis for the sampling rate setting and deployment optimization of nodes in smart grid.
作者
孙伟
丁震
王建平
Sun Wei;Ding Zhen;Wang Jianping(School of Electric Engineering and Automation,Hefei University of Technology,Hefei 230009,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2019年第8期140-146,共7页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(51877060)
国家电网公司科技项目资助
关键词
智能电网
无线传感器网络
马尔科夫链
多跳传输
延时优化
smart grid
wireless sensor networks
Markov chains
multi-hop transmission
delay optimization
