Optimizing the Energy Efficiency of Short Term Ultra Reliable Communications in Vehicular Networks

Nadas, J. P.B., Imran, M. A. , Brante, G. and Souza, R. D. (2017) Optimizing the Energy Efficiency of Short Term Ultra Reliable Communications in Vehicular Networks. In: 15th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt 2017), Paris, France, ISBN 9783901882906 (doi: 10.23919/WIOPT.2017.7959950)

Abstract

We evaluate the use of HARQ schemes in the context of vehicle to infrastructure communications considering ultra reliable communications in the short term from a channel capacity stand point. We show that it is not possible to meet strict latency requirements with very high reliability without some diversity strategy and propose a solution to determining an optimal limit on the maximum allowed number of retransmissions using Chase combining and simple HARQ to increase energy efficiency. Results show that using the proposed optimizations leads to spending 5 times less energy when compared to only one retransmission in the context of a benchmark test case for urban scenario. In addition, we present an approximation that relates most system parameters and can predict whether or not the link can be closed, which is valuable for system design.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Nadas, Mr Joao Pedro and Imran, Professor Muhammad
• Authors: Nadas, J. P.B., Imran, M. A., Brante, G., and Souza, R. D.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• ISBN: 9783901882906
• Copyright Holders: Copyright © 2017 IFIP
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher

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