通过减少空闲监听实现无线传感器网络的节能脉冲耦合同步策略设计
Energy-efficient pulse-coupled synchronization strategy design for wireless sensor networks through reduced idle listening.
作者信息
Wang Yongqiang, Núñez Felipe, Doyle Francis J
机构信息
Department of Chemical Engineering, University of California, Santa Barbara, California 93106-5080 USA.
出版信息
IEEE Trans Signal Process. 2012 Jun 20;60(10). doi: 10.1109/TSP.2012.2205685.
Synchronization is crucial to wireless sensor networks due to their decentralized structure. We propose an energy-efficient pulse-coupled synchronization strategy to achieve this goal. The basic idea is to reduce idle listening by intentionally introducing a large refractory period in the sensors' cooperation. The large refractory period greatly reduces idle listening in each oscillation period, and is analytically proven to have no influence on the time to synchronization. Hence, it significantly reduces the total energy consumption in a synchronization process. A topology control approach tailored for pulse-coupled synchronization is given to guarantee a -edge strongly connected interaction topology, which is tolerant to communication-link failures. The topology control approach is totally decentralized and needs no information exchange among sensors, and it is applicable to dynamic network topologies as well. This facilitates a completely decentralized implementation of the synchronization strategy. The strategy is applicable to mobile sensor networks, too. QualNet case studies confirm the effectiveness of the synchronization strategy.
由于无线传感器网络的分散式结构，同步至关重要。我们提出一种节能的脉冲耦合同步策略来实现这一目标。其基本思想是通过在传感器协作中有意引入较大的不应期来减少空闲监听。较大的不应期在每个振荡周期中大大减少了空闲监听，并且经分析证明对同步时间没有影响。因此，它显著降低了同步过程中的总能耗。给出了一种为脉冲耦合同步量身定制的拓扑控制方法，以保证一个容忍通信链路故障的 - 边强连通交互拓扑。该拓扑控制方法完全是分散式的，不需要传感器之间进行信息交换，并且也适用于动态网络拓扑。这便于同步策略的完全分散式实现。该策略也适用于移动传感器网络。QualNet案例研究证实了同步策略的有效性。
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