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广泛应用于各种物理参数测量领域的无线传感器网络,因其节点具有能量供应有限、硬件资源有限、数目众多、自组织和动态拓扑等特点,使得网络极易发生故障,从而高可靠、低故障是其运行的基本要求.本文针对多冗余通路设计的无线传感器网络故障预防方法存在工作状态冗余节点过多、能量大量浪费的问题,提出一种基于节点健康度的冗余通路控制方法.该方法利用汇聚节点收集网络内所有节点能量状态,计算节点健康度等相关参数,使用A-Star算法选择最优工作通路,控制其余冗余通路分批轮流休眠,从而达到减少和均衡网络工作过程能量消耗、预防某些节点能量提前耗尽导致网络能量故障发生的目的.仿真实验和实际节点实验的结果表明,在保证网络适当冗余通路的前提下,与其他相关方法比较,该方法可以显著均衡网络能量消耗,有效预防节点能量故障提前发生,明显延长网络寿命.
Widely used in a variety of physical parameter measurement of wireless sensor networks, because of its nodes with limited energy supply, limited hardware resources, a large number of self-organizing and dynamic topology and other characteristics, making the network extremely vulnerable to high reliability and low failure Is the basic requirement of its operation.In this paper, the multi-redundant path design for wireless sensor network failure prevention methods exist redundant redundant working state, a lot of waste of energy, and propose a redundant path control method based on node health. The method uses the aggregation node to collect the energy status of all the nodes in the network and calculate the health status of the nodes and other related parameters. The A-Star algorithm is used to select the optimal working path and control the rest of the redundant paths to take turns sleeping in batches so as to reduce and balance the network working process Energy consumption and the prevention of the energy depletion of some nodes leading to the occurrence of network energy failure.The results of simulation experiments and actual node experiments show that compared with other related methods, this method can be significant under the premise of ensuring the appropriate redundant path of the network Balance network energy consumption, effectively prevent node energy failure in advance Health, significantly prolonged the life of the network.