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  • 2015ICC-Weighted-sum (2)

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Weighted tradeoff between effective capacity and energy efficiency

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

Published
Publication date30/06/2015
Host publicationCommunications (ICC), 2015 IEEE International Conference on
PublisherIEEE
Pages238-243
Number of pages6
ISBN (Print)9781467364324
<mark>Original language</mark>English
EventIEEE International Conference on Communication (ICC), 2015 - UK, London, United Kingdom
Duration: 8/06/201512/06/2015

Conference

ConferenceIEEE International Conference on Communication (ICC), 2015
Country/TerritoryUnited Kingdom
CityLondon
Period8/06/1512/06/15

Conference

ConferenceIEEE International Conference on Communication (ICC), 2015
Country/TerritoryUnited Kingdom
CityLondon
Period8/06/1512/06/15

Abstract

This paper proposes a new power allocation technique to jointly optimize link-layer energy efficiency (EE) and effective capacity (EC) of a Rayleigh flat-fading channel with delay-outage probability constraints. Specifically, EE is formulated as the ratio of EC to the sum of transmission power and rate-independent circuit power consumption. A multi-objective optimization problem (MOP) to jointly maximize EE and EC is then formulated. By introducing importance weight into the MOP, we can flexibly change the priority level of EE and EC, and convert the MOP into a single-objective optimization problem (SOP) which can be solved using fractional programming. At first, for a given importance weight and a target delay-outage probability, the optimum average transmission power level to maximize the SOP is found. Then, the optimal power allocation strategy is derived based on the obtained average input power level. Simulation results confirm the analytical derivations and further show the effects of circuit power, importance weight, and transmission power constraint limit on the achievable tradeoff performance.

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©2015 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.