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Performance Analysis of Time Synchronization Protocols in Wireless Sensor Networks.

Linh-An Phan1, Taejoon Kim1, Taehong Kim2

  • 1School of Information and Communication Engineering, Chungbuk National University, Cheongju 28644, Korea.

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|July 21, 2019
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Summary
This summary is machine-generated.

Time synchronization protocols are crucial for wireless sensor networks. An enhanced Flooding Time Synchronization Protocol (E-FTSP) effectively reduces message delay jitter and improves overall performance in practical network conditions.

Keywords:
clockmessage delay jitterperformance analysistime synchronizationwireless sensor networks

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Area of Science:

  • Computer Science
  • Network Engineering
  • Wireless Communication

Background:

  • Time synchronization is critical for wireless sensor network (WSN) applications like scheduling and tracking.
  • Practical implementation faces challenges due to hardware, message delay jitter, environment, and topology.
  • Existing protocols offer micro-scale resolutions but struggle with real-world network variability.

Purpose of the Study:

  • To evaluate the performance of Flooding Time Synchronization Protocol (FTSP) and Gradient Time Synchronization Protocol (GTSP) under practical network conditions.
  • To identify factors affecting time synchronization accuracy in WSNs.
  • To propose and validate an enhanced FTSP (E-FTSP) for improved robustness.

Main Methods:

  • Performance measurement of FTSP and GTSP under varying message delay jitter, synchronization periods, network topologies, and packet loss rates.
  • Comparative analysis of standard FTSP against its extended version (E-FTSP).
  • Empirical evaluation focusing on error accumulation and time accuracy.

Main Results:

  • FTSP performance degrades significantly with message delay jitter, especially over multiple hops, due to error accumulation.
  • GTSP also shows sensitivity to network conditions.
  • The proposed E-FTSP demonstrates a marked improvement in mitigating the effects of message delay jitter.
  • E-FTSP enhances overall FTSP performance regarding accuracy and time factors.

Conclusions:

  • Message delay jitter is a primary challenge for time synchronization in practical WSNs.
  • Standard FTSP is vulnerable to jitter-induced errors.
  • E-FTSP offers a viable solution to enhance time synchronization reliability in challenging wireless environments.