针对无线功率传输技术的能量收集效率有限造成信噪比下降进而引发通信中断率增加的问题,在能量收集多跳D2D(Device to Device)无线传感网络中,提出一种基于改进K-means聚类的中继选择方法。首先,推导得到能量收集下的信噪比因子,使其作...针对无线功率传输技术的能量收集效率有限造成信噪比下降进而引发通信中断率增加的问题,在能量收集多跳D2D(Device to Device)无线传感网络中,提出一种基于改进K-means聚类的中继选择方法。首先,推导得到能量收集下的信噪比因子,使其作为K-means聚类特征。然后,利用最小欧氏距离原则得到距离聚类中心最近的实际节点的位置。最后,根据距离重排序得到中继节点,形成从源节点到目的节点的通信链路。仿真实验结果表明,相比最短路径算法和随机中继协作方案,所提出的改进算法链路信噪比更大,能够减小通信中断率,具有更好的中继性能。展开更多
Compared with flat routing protocols, clustering is a fundamental performance improvement technique in wireless sensor networks, which can increase network scalability and lifetime. In this paper, we integrate the mul...Compared with flat routing protocols, clustering is a fundamental performance improvement technique in wireless sensor networks, which can increase network scalability and lifetime. In this paper, we integrate the multi-hop technique with a backoff-based clustering algorithm to organize sensors. By using an adaptive backoff strategy, the algorithm not only realizes load balance among sensor node, but also achieves fairly uniform cluster head distribution across the network. Simulation results also demonstrate our algorithm is more energy-efficient than classical ones. Our algorithm is also easily extended to generate a hierarchy of cluster heads to obtain better network management and energy-efficiency.展开更多
提出了基于相关邻近集合的能耗均衡多跳分簇路由协议(relative neighborhood set based distributed multi-hop clustering routing protocol,RNS-MCRP)。网络初始化阶段,基站计算若干个簇头节点以及所有节点的相关邻近集合,并广播簇头...提出了基于相关邻近集合的能耗均衡多跳分簇路由协议(relative neighborhood set based distributed multi-hop clustering routing protocol,RNS-MCRP)。网络初始化阶段,基站计算若干个簇头节点以及所有节点的相关邻近集合,并广播簇头信息和所有节点的相关邻近集合。网络启动后,所有节点根据簇头节点的位置信息划分自己的邻居集合,并从邻居集合中选择剩余能量最大的节点作为下一跳节点。簇头节点推举本簇内部最大剩余能量的节点作为下一轮的簇头节点。实验结果显示,与LEACH(low energy adaptive clustering hierarchy)协议相比较,RNS-MCRP具有更好的能耗均衡特性,提高了网络生命时间。展开更多
基金supported by National Natural Science Foundation of China(61304256)Zhejiang Provincial Natural Science Foundation of China(LQ13F030013)+4 种基金Project of the Education Department of Zhejiang Province(Y201327006)Young Researchers Foundation of Zhejiang Provincial Top Key Academic Discipline of Mechanical Engineering and Zhejiang Sci-Tech University Key Laboratory(ZSTUME01B15)New Century 151 Talent Project of Zhejiang Province521 Talent Project of Zhejiang Sci-Tech UniversityYoung and Middle-aged Talents Foundation of Zhejiang Provincial Top Key Academic Discipline of Mechanical Engineering
文摘针对无线功率传输技术的能量收集效率有限造成信噪比下降进而引发通信中断率增加的问题,在能量收集多跳D2D(Device to Device)无线传感网络中,提出一种基于改进K-means聚类的中继选择方法。首先,推导得到能量收集下的信噪比因子,使其作为K-means聚类特征。然后,利用最小欧氏距离原则得到距离聚类中心最近的实际节点的位置。最后,根据距离重排序得到中继节点,形成从源节点到目的节点的通信链路。仿真实验结果表明,相比最短路径算法和随机中继协作方案,所提出的改进算法链路信噪比更大,能够减小通信中断率,具有更好的中继性能。
基金Supported by the National Natural Science Foundation of China under Grant No. 60872018,60721002,60875038the National Basic Research 973 Program of China under Grant No. 2007CB310607+2 种基金SRFDP Project under Grant No. 20070293001the Science and Technology Support Foundation of Jiangsu Province under Grant No. BE2009142 and BE2010180the Scientific Research Foundation of Graduate School of Nanjing University under Grant No. 2011CL07
文摘Compared with flat routing protocols, clustering is a fundamental performance improvement technique in wireless sensor networks, which can increase network scalability and lifetime. In this paper, we integrate the multi-hop technique with a backoff-based clustering algorithm to organize sensors. By using an adaptive backoff strategy, the algorithm not only realizes load balance among sensor node, but also achieves fairly uniform cluster head distribution across the network. Simulation results also demonstrate our algorithm is more energy-efficient than classical ones. Our algorithm is also easily extended to generate a hierarchy of cluster heads to obtain better network management and energy-efficiency.
文摘提出了基于相关邻近集合的能耗均衡多跳分簇路由协议(relative neighborhood set based distributed multi-hop clustering routing protocol,RNS-MCRP)。网络初始化阶段,基站计算若干个簇头节点以及所有节点的相关邻近集合,并广播簇头信息和所有节点的相关邻近集合。网络启动后,所有节点根据簇头节点的位置信息划分自己的邻居集合,并从邻居集合中选择剩余能量最大的节点作为下一跳节点。簇头节点推举本簇内部最大剩余能量的节点作为下一轮的簇头节点。实验结果显示,与LEACH(low energy adaptive clustering hierarchy)协议相比较,RNS-MCRP具有更好的能耗均衡特性,提高了网络生命时间。
