Reference : Maximizing energy efficiency in multiple access channels by exploiting packet droppin...
Scientific journals : Article
Engineering, computing & technology : Computer science
Maximizing energy efficiency in multiple access channels by exploiting packet dropping and transmitter buffering
Butt, M. M. [Computer Science and Engineering Department, Qatar University, Doha, Qatar]
Jorswieck, E. A. [Department of Electrical Engineering and Information Technology, TU Dresden, Dresden, Germany]
Ottersten, Björn mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) >]
IEEE Transactions on Wireless Communications
Institute of Electrical and Electronics Engineers Inc.
Yes (verified by ORBilu)
[en] Markov chain ; Multiuser diversity ; Access control ; Balloons ; Complex networks ; Delay tolerant networks ; Economic and social effects ; Energy efficiency ; Energy utilization ; Fading (radio) ; Markov processes ; Medium access control ; Network layers ; Optimization ; Packet loss ; Scheduling ; Transmitters ; Green communications ; Opportunistic scheduling ; Radio resource allocation ; Stochastic optimizations ; Trade off ; Quality of service
[en] 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. © 2002-2012 IEEE.

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