Original scientific paper

https://doi.org/10.5772/54898

Adaptive Time Synchronization for Homogeneous WSNs

Siddhartha Chauhan ; Department of Computer Science and Engineering, National Institute of Technology, India
Lalit Kumar Awasthi ; Department of Computer Science and Engineering, National Institute of Technology, India

Abstract

Wireless sensor networks (WSNs) are being used for observing real‐world phenomenon. It is important that sensor nodes (SNs) must be synchronized to a common time in order to precisely map the data collected by Sns. Clock synchronization is very challenging in WSNs as the sensor networks are resource constrained networks. It is essential that clock synchronization protocols designed for WSNs must be light weight i.e. SNs must be synchronized with fewer synchronization message exchanges. In this paper, we propose a clock synchronization protocol for WSNs where first of all cluster heads (CHs) are synchronized with the sink and then the cluster nodes (CNs) are synchronized with their respective CHs. CNs are synchronized with the help of time synchronization node (TSN) chosen by the respective CHs. Simulation results show that proposed protocol requires considerably fewer synchronization messages as compared with the reference broadcast synchronization (RBS) protocol and minimum variance unbiased estimation (MUVE) method. Clock skew correction mechanism applied in proposed protocol guarantees long term stability and hence decreases re‐synchronization frequency thereby conserving more energy.

Keywords

Clock synchronization; time synchronization; wireless sensor networks (WSNs)

Hrčak ID:

160458

URI

https://hrcak.srce.hr/160458

Publication date:

1.1.2012.

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