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基于概率触发的WSN能量有效拓扑控制算法
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摘要
传感器技术、微机电系统、信息处理技术、嵌入式计算及现代网络和无线通信等技术的进步,推动了具有现代意义的无线传感器网络的产生和发展。传感器网络中的节点一般采用能量有限的电池供电,且通常工作在较为复杂、危险的地理区域,节点的电池得不到更换或能量的补充。因此,降低节点能耗、延长网络生存时间,是无线传感器网络设计的重要目标。
     针对传感器网络分簇的拓扑控制技术进行了具体的分析与研究,将经典的LEACH分簇拓扑控制算法推广到了多级异构无线传感器网络中,并提出了一种适用于异构网络环境的基于概率触发的负载均衡拓扑控制算法(LBPT)。LBPT算法通过构建‘优于’关系和通讯权值形成传感器网络的拓扑结构,综合考虑了剩余能量、能耗速度、传输距离等影响网络生命周期的相关因素,构建簇头选举概率从而平衡簇间各节点的能量消耗,簇头节点信息传递采用LMST局部算法最大限度减少簇间信息传递的能量消耗。通过优化的网络拓扑结构,能够提高网络协议的效率,还可以为传感器网络诸多方面的应用奠定基础,更加有利于节省节点的能量来延长网络使用寿命。
     实验结果表明,基于概率触发的负载均衡拓扑控制算法有效地降低节点能耗,均衡了各簇间的能耗,可以显著地延长网络生存时间,提高网络的通信效率。
The advancement of some domains of scientific investigation, including sensor technology, micro-electro mechanical systems, information processing technology, embedded computing, modern networks, wireless communication techniques and so on, gives an impulsion to the generation and development of modem wireless sensor networks. The nodes in wireless sensor networks often adopt energy limited batteries, and work on complicated and dangerous regions, so their energies could not be supplemented or replaced. Therefore, reducing power consumption and prolonging the network lifetime are important targets of wireless sensor networks.
     Through specific analysis and research to the clustering of sensor networks topology control techonology, promote the classic LEACH clumping topological control algorithm in multi-stage heterogeneity of wireless sensor network, And put forward a based on probability triggering wireless sensor networks energy efficient in topology control algorithm(LBPT) that suitable to heterogeneous network environment. LBPT algorithm construct sensor network topology by 'Superior' relationship and communication weight, through residual energy, energy consumption rate, transmission distance and other factors that affect the network life construct of the probability of cluster head election for balancing the various nodes of the cluster energy consumption; Cluster head node information transmission using local algorithm LMST to minimize energy consumption. Through the optimization of the network topology structure, can improve the efficiency of the network protocol, and can also be for many sensor network applications and more conducive to save node energy to prolong the network service life.
     Simulation results show that based on probability triggering WSN energy efficient in topology control algorithm(LBPT) can effectively reduce the node energy consumption, energy consumption between the clusters have balanced, Can significantly prolong the network' lifetime and improve the efficiency of communication network.
引文
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