SLTP: scalable lightweight time synchronization protocol for wireless sensor network

Authors:
Sepideh Nazemi Gelyan;Arash Nasiri Eghbali;Laleh Roustapoor;Seyed Amir Yahyavi Firouz Abadi;Mehdi Dehghan
Affiliations:
Dept. Of Computer Engineering, Islamic Azad University, Firouzkooh Branch;Computer Engineering Department, Amirkabir University of Technology;Computer Engineering Department, Amirkabir University of Technology;Electrical & Computer Engineering Department, University of Tehran;Computer Engineering Department, Amirkabir University of Technology
Venue:
MSN'07 Proceedings of the 3rd international conference on Mobile ad-hoc and sensor networks
Year:
2007

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Abstract

In wireless sensor networks, time synchronization is a critical problem. In this paper, we propose SLTP, a Scalable Lightweight Time-synchronization Protocol for wireless sensor networks. By using passive clustering and linear regression SLTP can reduce the energy consumption of network nodes and also decrease the overhead of creating and maintaining the clusters. Moreover SLTP uses linear regression to compute the time. Therefore, it can calculate the clock skew and offset between each node and its cluster head in order to estimate the local time of remote nodes in the future or the past. Simulation results show that by this we can gain considerable improvements in power consumption, accuracy and scalability in comparison to similar algorithms.