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Sensors 2016, 16(4), 505; doi:10.3390/s16040505

Optimized Sharable-Slot Allocation Using Multiple Channels to Reduce Data-Gathering Delay in Wireless Sensor Networks

1
School of Engineering, Eastern International University (EIU), Binh Duong City 822096, Vietnam
2
Ubicom Lab, School of Computer Engineering and Information Technology, University of Ulsan, P.O. Box 18, Ulsan 680-749, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Leonhard M. Reindl
Received: 24 January 2016 / Revised: 30 March 2016 / Accepted: 4 April 2016 / Published: 9 April 2016
(This article belongs to the Section Sensor Networks)
View Full-Text   |   Download PDF [4365 KB, uploaded 9 April 2016]   |  

Abstract

The demand for event-driven real-time applications for timely and reliable data acquisition is growing in industrial sectors. However, it is challenging to satisfy the requirements since constraints such as limited available energy and bandwidth are inherent in a wireless sensor network. To deal with timely delivery, one desirable approach is to improve network throughput so that more real-time applications with tighter time constraints can be satisfied in any given network. To deal with reliable delivery, the use of a carrier sense multiple access mechanism for data transmission is preferred, along with the use of a sharable slot within which multiple nodes compete to send data. Thus, we present a method of using multiple channels and a way to optimize the size of the sharable slot. The proposed channel-slot–scheduling algorithm tries to optimize the size of a sharable slot when multiple channels are used. The algorithm also deals with situations where nodes generate multiple data packets in each round of a data-gathering period. It is shown through simulation that our approach greatly outperforms others on some selected metrics. View Full-Text
Keywords: slot scheduling; optimized sharable slot; multi-channel; reliability; gathering delay slot scheduling; optimized sharable slot; multi-channel; reliability; gathering delay
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Van Vinh, P.; Oh, H. Optimized Sharable-Slot Allocation Using Multiple Channels to Reduce Data-Gathering Delay in Wireless Sensor Networks. Sensors 2016, 16, 505.

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