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A New Approach for Time Synchronization in Wireless Sensor Networks: Pairwise Broadcast Synchronization

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3 Author(s)
Kyoung-lae Noh ; Dept. of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843-3128, USA (e-mail: {klnoh, serpedin, kqaraqe} ; Erchin Serpedin ; Khalid Qaraqe

This letter proposes an energy-efficient clock synchronization scheme for Wireless Sensor Networks (WSNs) based on a novel time synchronization approach. Within the proposed synchronization approach, a subset of sensor nodes are synchronized by overhearing the timing message exchanges of a pair of sensor nodes. Therefore, a group of sensor nodes can be synchronized without sending any extra messages. This paper brings two main contributions: 1. Development of a novel synchronization approach which can be partially or fully applied for implementation of new synchronization protocols and for improving the performance of existing time synchronization protocols. 2. Design of a time synchronization scheme which significantly reduces the overall network-wide energy consumption without incurring any loss of synchronization accuracy compared to other well-known schemes.

Published in:

IEEE Transactions on Wireless Communications  (Volume:7 ,  Issue: 9 )