Energy-Efficient Power Control in Fading Channels with Markovian Sources and QoS Constraints

Mustafa Ozmen, M. Cenk Gursoy

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


In this paper, energy-efficient power adaptation policies in fading channels are analyzed when data arrivals are modeled as Markovian processes (namely, discrete Markov, Markov fluid, and discrete and fluid Markov modulated Poisson processes) and statistical quality of service (QoS) constraints are imposed on buffer overflow probabilities. In the analysis, both transmission and circuit power consumptions are considered. After formulating energy efficiency (EE) as maximum throughput normalized by the total power consumption, optimal power control policies that maximize EE are obtained for different source models. The impact of source randomness on EE is determined. Optimal power control schemes maximizing the throughput under EE or average power constraints are also investigated. With this, tradeoff between throughput and EE is studied. Finally, the analysis is extended to multichannel scenarios. Overall, the influence of source statistics, QoS constraints, and number of subchannels on the optimal power control policies, throughput, and EE performance is identified.

Original languageEnglish (US)
Pages (from-to)5349-5364
Number of pages16
JournalIEEE Transactions on Communications
Issue number12
StatePublished - Dec 2016


  • Energy efficiency
  • Markov arrivals
  • QoS constraints
  • fading channels
  • power control

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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