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Title: Time Synchronization in Duty Cycled Sensor Network
Authors: Sharma, R.
Keywords: Computer Science & Engineering
Issue Date: 2016
Series/Report no.: DI-93;
Abstract: In this thesis work, we consider a duty-cycled wireless sensor network with the assumption that the on/off schedules are uncoordinated. In such networks, the time synchronization of the nodes will require re-transmission of the synchronization messages. Ideally a node should re-transmit for the maximum sleep duration to ensure that all nodes are synchronized. However, such a proposition will immensely increase the energy consumption of the nodes. Such a situation demands that there is an upper bound of the number of re-transmissions. We refer to the time a node spends in the re-transmission of the control message as the broadcast duration. We ask the question, what should be the broadcast duration to ensure that a certain percentage of the available nodes are synchronized. The problem to estimate the broadcast duration is formulated so as to capture the probability threshold of the nodes being synchronized. Results show the proposed analytical model can predict the broadcast duration with a given lower error margin under real world conditions, thus demonstrating the efficiency of our solution.
Appears in Collections:01. CSE

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