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Sensors 2018, 18(2), 612; https://doi.org/10.3390/s18020612

Optimal Scheduling and Fair Service Policy for STDMA in Underwater Networks with Acoustic Communications

Department of Ingeniería de Comunicaciones, University of Málaga, Málaga 29010, Spain
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Received: 15 December 2017 / Revised: 12 February 2018 / Accepted: 15 February 2018 / Published: 17 February 2018
(This article belongs to the Special Issue Smart Communication Protocols and Algorithms for Sensor Networks)
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Abstract

In this work, a multi-hop string network with a single sink node is analyzed. A periodic optimal scheduling for TDMA operation that considers the characteristic long propagation delay of the underwater acoustic channel is presented. This planning of transmissions is obtained with the help of a new geometrical method based on a 2D lattice in the space-time domain. In order to evaluate the performance of this optimal scheduling, two service policies have been compared: FIFO and Round-Robin. Simulation results, including achievable throughput, packet delay, and queue length, are shown. The network fairness has also been quantified with the Gini index. View Full-Text
Keywords: optimal scheduling; time-division multiple access; Gini index; string network; underwater sensor networks optimal scheduling; time-division multiple access; Gini index; string network; underwater sensor networks
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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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Luque-Nieto, M.-Á.; Moreno-Roldán, J.-M.; Otero, P.; Poncela, J. Optimal Scheduling and Fair Service Policy for STDMA in Underwater Networks with Acoustic Communications. Sensors 2018, 18, 612.

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