CLOCK SYNCHRONIZATION IN WIRELESS SENSOR NETWORKS
CLOCK SYNCHRONIZATION IN WIRELESS SENSOR NETWORKS
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发表时间：
2012
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通讯作者：
K. Yıldırım
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作者：
K. Yıldırım
无线传感器网络（WSNs）中的传感器节点配备有廉价的硬件时钟，由于它们的低端石英晶体的频率不稳定并且随时间变化，这些时钟经常漂移。温度变化等环境因素会导致短期频率不稳定，而振荡器老化等细微影响会导致长期频率不稳定。因此，节点的硬件时钟可能不总是保持同步，尽管它们在启动时可能已经同步。
Sensor nodes in wireless sensor networks (WSNs) are equipped with cheap hardware clocks which frequently drift apart due to their low-end quartz crystals whose frequencies are not stable and vary over time. Environmental factors such as temperature changes result in short-term frequency instability and subtle effects such as oscillator aging result in long-term frequency instability. Hence, the hardware clocks of the nodes may not remain always synchronized although they might have been synchronized when they are started up.