Clock adjustment for a low power listening wireless infrastructure monitoring system
2016 International Conference on Internet of Things and Applications (IOTA)(2016)
摘要
Sensor networks for infrastructure monitoring systems require battery operated sensing nodes with a lifetime of 10 years, a standardized technology, and low engineering costs. Low Power Listening (LPL) is well known as a technology to extend the lifetime of sensor network nodes. LPL technology is effective for power saving when time synchronization between the nodes is achieved. However, nodes using a Clock Crystal Oscillator cannot maintain time synchronization. The reason is the CXO's clock is skewed. We proposed NES-MAC that is IEEE802.15.4e standards-based MAC protocol with clock correction function. The NES-MAC stack can communicate with the normal IEEE802.15.4e MAC stack with low power consumption. We show that NES-MAC nodes can operate for more than 10 years on two CR123A batteries.
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关键词
Clocks,Sensor networks,Synchronization,IEEE standards,Low power
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