Journal
SENSORS
Volume 16, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/s16060835
Keywords
WSNs; power-efficient; clustering; channel fading; cross layer
Funding
- National Natural Science Foundation of China [51204176]
- Innovation Fund Project on the Integration of Industry, Education and Research of Jiangsu Province [BY2012081]
- Natural Science Foundation of Jiangsu Province [BK20140202]
- China 863 Project [2012AA062103]
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This study proposes a novel power-efficient and anti-fading clustering based on a cross-layer that is specific to the time-varying fading characteristics of channels in the monitoring of coal mine faces with wireless sensor networks. The number of active sensor nodes and a sliding window are set up such that the optimal number of cluster heads (CHs) is selected in each round. Based on a stable expected number of CHs, we explore the channel efficiency between nodes and the base station by using a probe frame and the joint surplus energy in assessing the CH selection. Moreover, the sending power of a node in different periods is regulated by the signal fade margin method. The simulation results demonstrate that compared with several common algorithms, the power-efficient and fading-aware clustering with a cross-layer (PEAFC-CL) protocol features a stable network topology and adaptability under signal time-varying fading, which effectively prolongs the lifetime of the network and reduces network packet loss, thus making it more applicable to the complex and variable environment characteristic of a coal mine face.
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