Abstract
New research opportunities are emerging as Wireless Sensor Networks (WSNs) are penetrating into the industrial domain; one such prospect is within time synchronization. For the operation of WSNs, partial or full time synchronization is needed. Time synchronization is very important in a distributed WSN for the purpose of data fusion, time interval calculation, context-free access to radio channel, coordination, event ordering and power management. This paper proposes a novel distributed time synchronization protocol for WSNs, which compensates for the nondeterministic delays by estimating the uncertainties in the synchronization packet delays. The main idea is to minimize the uncertainties in the synchronization packet delays to achieve a synchronization scheme that is accurate, efficient and has a low communication overhead. An average per hop synchronization accuracy of 2.4µs has been achieved.
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