• Optics and Precision Engineering
  • Vol. 21, Issue 12, 3231 (2013)
CHEN Gui-fen* and WANG Yi-jun
Author Affiliations
  • [in Chinese]
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    DOI: 10.3788/ope.20132112.3231 Cite this Article
    CHEN Gui-fen, WANG Yi-jun. Optimization time synchronization in cross-layer service for WSNs[J]. Optics and Precision Engineering, 2013, 21(12): 3231 Copy Citation Text show less

    Abstract

    The current time synchronization algorithms for Wireless Sensor Networks(WSNs) are dependent on the collected time data strongly. Therefore, an optimization time synchronization technology for cross-layer service was presented to work out related issues. Firstly, frame header fragmentation in a MAC layer was used for the fragment and reassembly of packets. By zoning techniques,superframe structure of the MAC layer was adjusted,and then the hidden node problem was solved through the slot backoff algorithm.Then,a timestamp was added into the frame structure of the broadcast message to record the time data of received messages, and all received error data were filtered through clustering techniques. Also the synchronous clock drift was compensated. The simulation results indicate that the time synchronization accuracy is improved by 8 μs, the convergence time is reduced by 10% and the energy consumption is less than 150 mW compared with those of other traditional algorithms.These results prove that the technology ensures the accuracy,and simultaneously reduces the convergence time and the energy consumption of the network.
    CHEN Gui-fen, WANG Yi-jun. Optimization time synchronization in cross-layer service for WSNs[J]. Optics and Precision Engineering, 2013, 21(12): 3231
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