A Design for Performance Improvement of Clock Synchronization in WSNs using a TDMA-based MAC Protocol

Watwe, Siddharth and Bhatia, Ashutosh and Hansdah, RC (2014) A Design for Performance Improvement of Clock Synchronization in WSNs using a TDMA-based MAC Protocol. In: 28th IEEE International Conference on Advanced Information Networking and Applications Workshops (IEEE WAINA), MAY 13-16, 2014, Univ Victoria, Victoria, CANADA, pp. 366-371.

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Abstract

Clock synchronization in a wireless sensor network (WSN) is quite essential as it provides a consistent and a coherent time frame for all the nodes across the network. Typically, clock synchronization is achieved by message passing using a contention-based scheme for media access, like carrier sense multiple access (CSMA). The nodes try to synchronize with each other, by sending synchronization request messages. If many nodes try to send messages simultaneously, contention-based schemes cannot efficiently avoid collisions. In such a situation, there are chances of collisions, and hence, message losses, which, in turn, affects the convergence of the synchronization algorithms. However, the number of collisions can be reduced with a frame based approach like time division multiple access (TDMA) for message passing. In this paper, we propose a design to utilize TDMA-based media access and control (MAC) protocol for the performance improvement of clock synchronization protocols. The basic idea is to use TDMA-based transmissions when the degree of synchronization improves among the sensor nodes during the execution of the clock synchronization algorithm. The design significantly reduces the collisions among the synchronization protocol messages. We have simulated the proposed protocol in Castalia network simulator. The simulation results show that the proposed protocol significantly reduces the time required for synchronization and also improves the accuracy of the synchronization algorithm.

Item Type:	Conference Proceedings
Publisher:	IEEE
Additional Information:	Copy right for this article belongs to the IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Keywords:	Clock Synchronization; TDMA MAC Protocol; Wireless Sensor Networks; Distributed Systems
Department/Centre:	Division of Electrical Sciences > Computer Science & Automation
Date Deposited:	07 Jan 2016 07:24
Last Modified:	11 Oct 2018 09:58
URI:	http://eprints.iisc.ac.in/id/eprint/53024

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