Abstract—Existing time synchronization protocols for Wireless Sensor Networks (WSN) have already focused on lot of time synchronization issues like accuracy, energy efficiency, security and time synchronization itself etc for static wireless sensor networks but best of our knowledge time synchronization for mobile wireless sensor networks has not been fully explored yet, so there is need to design protocols that can assist to time synchronize mobile wireless sensor networks in a simple way to achieve better time synchronization accuracy. In this paper we propose mathematical model that is basically an extension of pair-wise time synchronization protocol and it aims to synchronize mobile wireless sensor node with the help of nearby static wireless sensor node. This model can be used to achieve network wide time synchronization. Proposed model has kept the track of direction and velocity of mobile nodes. Proposed protocol has been simulated and results are compared with existing pair-wise time synchronization protocol. Results show that pair-wise time synchronization protocol introduces significant error that will keep increasing with the moving velocity of mobile node. In contrast proposed algorithm performed very well in terms of accuracy, energy and computational cost and was able to synchronize mobile nodes with the help of static sensor nodes successfully.

Index Terms—Mobile sensors, time synchronization, wireless sensor network.

Asma Khan is with Department of Computer Science, Isra University Hyderabad. (E-mail: asma.ansari@isra.edu.pk).
Aftab Ahmed Memon is with Department of Telecommunication Engineering, Mehran University of Engineering and Technology, Jamshoro, Pakistan (e-mail: memon_aftab@yahoo.com).
Abdul Aziz Memon is with Department of Electrical Engineering, Sukkur Institute of Business Administration, Pakistan (e-mail: azizsheraz@yahoo.com).

 

Cite:Asma Khan, Aftab Ahmed Memon, and Abdul Aziz Memon, "Time Synchronization for Mobile Wireless Sensor Network," International Journal of Computer and Electrical Engineering vol. 6, no.2, pp. 118-122, 2014.