无线传感器网络中的分簇算法

路由协议是无线传感器网的关键技术之一,它的性能影响着整个网络的性能,分簇路由协议具有可扩展性好,能量高效而成为研究热点。本文在分析和研究主要的分簇路由算法的基础上,提出了今后研究的方向和内容。     

适用于无线传感器网络分簇算法研究

无线传感器网络拓扑控制算法对于延长网络的生存时间、减小通信干扰、提高路由协议和MAC协议的效率等具有重要的意义。根据无线传感器网络的分簇机制,有效地利用成簇算法均衡网络节点负载,降低能耗,从簇首的选择、簇组织和簇的路由三个方面系统地分析当前典型的成簇算法,对算法的特点和适用情况进行比较分析,并指出目前算法存在问题和改进措施。     

适用于无线传感器网络分簇算法研究

无线传感器网络拓扑控制算法对于延长网络的生存时间、减小通信干扰、提高路由协议和MAC协议的效率等具有重要的意义。根据无线传感器网络的分簇机制,有效地利用成簇算法均衡网络节点负载,降低能耗,从簇首的选择、簇组织和簇的路由三个方面系统地分析当前典型的成簇算法,对算法的特点和适用情况进行比较分析,并指出目前算法存在问题和改进措施。     

基于分簇的无线传感器网络设计

无线传感器网络是由部署在监测区域内大量的廉价微型传感器结点组成,存在传感器节点密度高、网络拓扑变化频繁以及节点的功率、计算能力和数据存储能力有限等不足。介绍了基于分簇结构的两层无线传感器网络实现远程监测的软件与硬件总体设计方法。     

基于多级异构网络的无线传感器网络高效分簇路由算法

在较大规模的无线传感器网络周期性数据采集应用中,经常会出现异构网络, LEACH等协议没有考虑节点的异质性。提出一种基于多级异构网络的高效路由分簇协议,考虑了节点的异质性,为不同类型节点设置不同簇头选举概率及阈值函数,优化簇头选举策略,较高初始能量和剩余能量的节点比低能量节点拥有更多的机会成为簇头节点。实验结果表明,能够高效地利用传感器网络采集数据,网络负载总体均衡,并延长网络生存周期。     

无线传感器网络中覆盖控制理论与算法研究

分析了无线传感器网络中的覆盖控制理论及相关问题,在此基础上对无线传感器网络中的覆盖控制算法进行了研究。     

一种基于分簇无线传感器网络的时间同步技术

针对无线传感器网络中时间同步技术应具有高效率且节省资源的要求,给出了一种改进算法：使用时间同步有效性检查阶段的时间戳,在只发送一个小数据包的基础上实现同步功能,使所需消息传输量较传统算法少得多,既提高了同步效率,又降低了能源消耗,并兼顾了应用场合的精度要求,仿真结果验证了该方法的有效性。     

无线传感器网络分簇路由协议研究综述

首先分析了无线传感器网络区别于传统无线网络的个性化特点,然后从簇头选举、簇的形成和数据传输等方面概括了无线传感器网络分簇路由协议的研究现状,最后对无线传感器网络路由协议进行了总结。     

基于遗传策略的无线传感器网络分簇路由优化

分析了无线传感器网络的特点及各种路由协议的优缺点,将改进的遗传算法方案应用到无线传感器网络分簇路由优化问题中,在满足传感器网络约束条件的基础上智能地计算出最佳路由,使通信距离最小化。模拟实验的结果表明,本文提出的算法方案在解决无线传感器网络路由优化问题中具有良好的综合求解能力。     

Power-efficient topologies for wireless sensor networks with fixed communication range

The expectations for sensor networks are growing. The performance of wireless sensor networks （WSNs） is greatly influenced by their network topology. In this paper, we consider four patterned topologies that best support connectivity among these deployed sensor nodes in two-tiered WSNs. The theoretical and simulation results show that the triangle-based topology has smaller cell number, shorter maximum hop length, less total energy consumption, and better performance than other topologies. The analysis carried out in this paper could provide the guidelines for network deployment and protocol design in the future applications.     

Energy efficient clustering algorithm based on neighbors for wireless sensor networks

In this paper, an energy efficient clustering algorithm based on neighbors (EECABN) for wireless sensor networks is proposed. In the algorithm, an optimized weight of nodes is introduced to determine the priority of clustering procedure. As improvement, the weight is a measurement of energy and degree as usual, and even associates with distance from neighbors, distance to the sink node, and other factors. To prevent the low energy nodes being exhausted with energy, the strong nodes should have more opportunities to act as cluster heads during the clustering procedure. The simulation results show that the algorithm can effectively prolong whole the network lifetime. Especially at the early stage that some nodes in the network begin to die, the process can be postponed by using the algorithm.     

QoS adaptive topology configuration in synchronous wireless sensor networks

By using hyper-graph theory,this paper proposes a QoS adaptive topology configuration(QATC) algorithm to effectively control large-scale topology and achieve robust data transmitting in synchronous wireless sensor networks.Firstly,a concise hyper-graph model is abstracted to analyze the large-scale and high-connectivity network.Secondly,based on the control theory of biologic "Cell Mergence",a novel self-adaptive topology configuration algorithm is used to build homologous perceptive data logic sub-network ...     

无线传感器网络的SPIN协议研究

无线传感器网络是计算机科学技术的一个新的研究领域，是传感器技术、嵌入式计算技术、分布式信息处理技术和无线通信技术相结合的产物，具有广阔的理论研究和应用前景。本文对一种无线传感器网络路由协议SPIN-PP作了分析，并针对无线传感器网络的特点对其进行了一些改进工作，经NS2上的仿真结果表明这是一种有效的改进方案。     

基于SP结构的WSN机密通信

为提高无线传感器网络机密通信的有效性,提出了基于SP结构的WSN单字节密钥方案。采用shifter（移位）,permutation（置换）以及异或操作对明文进行加密,然后再对密文采用移位、置换和异或组合操作进行解密。分析了移位、置换和异或操作原理,给出了机密算法。明文通过SP结构操作加密得到的密文能够同样通过SP结构解密。分析表明,单字节的SP结构的加密与解密可以用于WSN的机密通信。     

一种基于无线传感器网络的生理信号采集系统（英文）

提出了一种应用于课堂教育的无线生理采集系统,以了解学生在上课过程中的生理变化情况.系统中,反映学生的注意力和情绪状态的生理电信号可通过测量ECG来获得.生物电信号采用200Hz的采样速率,并由ZigBee协议进行无线传输.同时,节点嵌入了蓝牙技术以适应高采样速率和高带宽的传输要求.本系统可以同时对30个学生进行监测,并且给出了系统在教室执行监测任务的实验结果.最后探讨了无线传感器网络在教育领域的应用.     

A new solution to wireless sensor network density control problem

1 Introduction a At present, the research work on wireless sensor networks is based on the assumption that the energy of a sensor node is provided by the battery and can not be regenerated. The lifetime of the node is limited and ephemeral. Hence research…     

Optimized algorithm for balancing clusters in wireless sensor networks

Wireless sensor networks consist of hundreds or thousands of sensor nodes that involve numerous restrictions including computation capability and battery capacity. Topology control is an important issue for achieving a balanced placement of sensor nodes. The clustering scheme is a widely known and efficient means of topology control for transmitting information to the base station in two hops. The automatic routing scheme of the self-organizing technique is another critical element of wireless sensor networks. In this paper we propose an optimal algorithm with cluster balance taken into consideration, and compare it with three well known and widely used approaches, i.e., LEACH, MEER, and VAP-E, in performance evaluation. Experimental results show that the proposed approach increases the overall network lifetime, indicating that the amount of energy required for communication to the base station will be reduced for locating an optimal cluster.     

无线传感器网络环境监测采集节点的设计

介绍了应用于环境参数监测的无线传感器网络采集节点的设计要点。系统以nRF24L01无线射频芯片和MSP430F1232单片机为核心,实时采集并上传节点周围环境的温度、湿度、光照强度和可燃性气体浓度等信息。节点采用电池供电和无线传输方式,具有体积小、成本低、功耗低、性能稳定和便于携带等优点。