Statistical analysis of the pulse-coupled synchronization strategy for wireless sensor networks.
Statistical analysis of the pulse-coupled synchronization strategy for wireless sensor networks.
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DOI：
10.1109/tsp.2013.2275511
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发表时间：
2013-07-30
期刊：
影响因子：
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通讯作者：
Doyle FJ 3rd
中科院分区：
文献类型：
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作者：
Wang Y;Núñez F;Doyle FJ 3rd
脉冲耦合同步在传感器网络中引起了越来越多的关注。然而，它的性质尚未得到充分研究。使用统计分析，我们证明了分析，通过控制在每个节点的连接数，同步可以保证一般脉冲耦合振荡器，即使在存在的不应期。该方法不需要初始相位驻留在半个振荡周期内，这改进了现有的结果。我们还发现，一个不应期可以战略性地包括在几乎不牺牲同步概率，以减少空闲监听。考虑到减少空闲侦听导致同步过程中更高的能量效率，策略性地添加的不应期使得同步方案吸引廉价的传感器节点，其中能量是宝贵的系统资源。我们还分析了存在不可靠通信链路时的脉冲耦合同步，得到了类似的结果。QualNet实验结果证实了理论预测的有效性。
Pulse-coupled synchronization is attracting increased attention in the sensor network community. Yet its properties have not been fully investigated. Using statistical analysis, we prove analytically that by controlling the number of connections at each node, synchronization can be guaranteed for generally pulse-coupled oscillators even in the presence of a refractory period. The approach does not require the initial phases to reside in half an oscillation cycle, which improves existing results. We also find that a refractory period can be strategically included to reduce idle listening at nearly no sacrifice to the synchronization probability. Given that reduced idle listening leads to higher energy efficiency in the synchronization process, the strategically added refractory period makes the synchronization scheme appealing to cheap sensor nodes, where energy is a precious system resource. We also analyzed the pulse-coupled synchronization in the presence of unreliable communication links and obtained similar results. QualNet experimental results are given to confirm the effectiveness of the theoretical predictions.