Maximizing energy efficiency in multiple access channels by exploiting packet dropping and transmitter buffering

Butt, M. M. , Jorswieck, E. A. and Ottersten, B. (2015) Maximizing energy efficiency in multiple access channels by exploiting packet dropping and transmitter buffering. IEEE Transactions on Wireless Communications, 14(8), pp. 4129-4141. (doi: 10.1109/TWC.2015.2417151)

Abstract

Quality of service (QoS) for a network is characterized in terms of various parameters specifying packet delay and loss tolerance requirements for the application. The unpredictable nature of the wireless channel demands for application of certain mechanisms to meet the QoS requirements. Traditionally, medium access control (MAC) and network layers perform these tasks. However, these mechanisms do not take (fading) channel conditions into account. In this paper, we investigate the problem using cross layer techniques where information flow and joint optimization of higher and physical layer is permitted. We propose a scheduling scheme to optimize the energy consumption of a multiuser multi-access system such that QoS constraints in terms of packet loss are fulfilled while the system is able to maximize the advantages emerging from multiuser diversity. Specifically, this work focuses on modeling and analyzing the effects of packet buffering capabilities of the transmitter on the system energy for a packet loss tolerant application. We discuss low complexity schemes which show comparable performance to the proposed scheme. The numerical evaluation reveals useful insights about the coupling effects of different QoS parameters on the system energy consumption and validates our analytical results.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Butt, Dr Muhammad Majid
• Authors: Butt, M. M., Jorswieck, E. A., and Ottersten, B.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: IEEE Transactions on Wireless Communications
• Publisher: IEEE
• ISSN: 1536-1276
• ISSN (Online): 1558-2248
• Published Online: 26 March 2015
• Copyright Holders: Copyright © 2015 IEEE
• First Published: First published in IEEE Transactions on Wireless Communications 14(8): 4129-4141
• Publisher Policy: Reproduced in accordance with the publisher copyright policy