Impact of channel and source variations on the energy efficiency under QoS constraints
- 1 July 2012
- conference paper
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
Energy efficiency in wireless fading channels is studied in the presence of statistical quality of service (QoS) constraints. Energy per bit is employed as the performance metric. Minimum energy per bit and wideband slope expressions are determined to quantify the energy efficiency in the low signal-to-noise ratio (SNR) regime. In particular, the impact of channel and source variations is investigated. A block-fading model in which fading coefficients are arbitrarily correlated in one block before assuming independent realizations in the next one, is considered. Initially, the effect of fading correlation on energy efficiency is analyzed. It is shown that while minimum energy per bit does not depend on the fading correlation, wideband slope decreases as positive correlation increases, resulting in increased energy requirements at low but nonzero SNR levels. Subsequently, an ON-OFF source arrival model is considered. It is shown that while the minimum energy per bit does not get affected by source variations, wideband slope diminishes with increasing source burstiness. (”THIS PAPER IS ELIGIBLE FOR THE STUDENT PAPER AWARD”).Keywords
This publication has 6 references indexed in Scilit:
- Analysis of energy efficiency in fading channels under QoS constraintsIEEE Transactions on Wireless Communications, 2009
- Effective capacity: A wireless link model for support of quality of serviceIEEE Transactions on Wireless Communications, 2003
- Effective bandwidths of departure processes from queues with time varying capacitiesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Spectral efficiency in the wideband regimeIEEE Transactions on Information Theory, 2002
- Performance Guarantees in Communication NetworksTelecommunication Networks and Computer Systems, 2000
- Stability, queue length, and delay of deterministic and stochastic queueing networksIEEE Transactions on Automatic Control, 1994