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Erschienen in: Wireless Networks 7/2020

23.06.2020

Energy efficient multi-beacon guard method for periodic data gathering in time-synchronized WSN

verfasst von: Debanjan Sadhukhan, Seela Veerabhadreswara Rao

Erschienen in: Wireless Networks | Ausgabe 7/2020

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Abstract

In periodic data-gathering, sensors can switch on the transceiver only during packet transmission to save energy. Exact clock-synchronization is challenging to achieve because of error present in synchronization protocols. Clock-disagreement increases with time in the absence of synchronization. This paper proposes an Energy-efficient Multi Beacon Guard method (EMBG) to decrease the energy consumption by minimizing the awake time of sender and receiver by periodically switching on and off the receivers during the guard-time. We determine the optimal number-of-times the receiver needs to wake up along with the wake-up intervals to collectively minimize the total energy consumption of the sender–receiver pair during transmission. This paper shows the effectiveness of EMBG in energy conservation and compares with existing approaches using ns2 simulation.

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Fußnoten
1
On the other hand, the packets are exchanged without synchronization in asynchronous techniques [9, 10]. In this work we are interested in synchronous s/w scheduling.
 
2
Note that, periodic events like temperature or pressure are detected by the corresponding sensing device. In this work, we assume that the communication device, which consumes more energy, is switched on only when a communication is expected.
 
3
The non-determinism occurs as a result of an imperfect crystal oscillator and governs by several environmental factors such as: pressure, temperature, radiation and magnetic fields, etc. Moreover, estimation errors involve in clock-synchronization further add this non-determinism.
 
4
Note that, \(\tau _p\) denotes the mean of the distribution. The scheduled arrival time of the message is nonzero in a real system. If we assume \(\tau _p = 0\), then we actually shift the mean of the distribution and keep the standard deviation same. The analysis derived in this paper holds for a node in a real system given that the corresponding mean needs to be adjusted by \(\tau _p\).
 
5
We also assume that the delay between a sender wakes up and the message arrives at the receiver is negligible. In other words, the actual wake-up time of the sender follows the same distribution of \(\tau _p'\).
 
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Metadaten
Titel
Energy efficient multi-beacon guard method for periodic data gathering in time-synchronized WSN
verfasst von
Debanjan Sadhukhan
Seela Veerabhadreswara Rao
Publikationsdatum
23.06.2020
Verlag
Springer US
Erschienen in
Wireless Networks / Ausgabe 7/2020
Print ISSN: 1022-0038
Elektronische ISSN: 1572-8196
DOI
https://doi.org/10.1007/s11276-020-02400-5

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