Stochastic user scheduling and power control for energy harvesting networks with statistical delay provisioning

Imtiaz Ahmed, Khoa Tran Phan, Tho Le-Ngoc

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

3 Citations (Scopus)


We study the stochastic user scheduling and power control problem for an uplink multi-user network over time-varying channels, where the users randomly harvest renewable energies from the environment. For each user, the renewable energies and arriving data packets with a constant rate are stored in energy (battery) and data buffers, respectively. Users have statistical packet delay constraints in terms of maximum acceptable delay-outage probabilities. We classify the users as prioritized and non-prioritized users. Our goal is to maximize the arrival rate of the non-prioritized user while supporting the minimum data rate requirements for the prioritized users. We reformulate the problem as an infinite-horizon Markov decision process (MDP) using asymptotic delay analysis and study the optimal scheduling and power control policy. Since the optimal policy requires centralized processing with high computational complexity, we develop a reduced-complexity distributed algorithm, which can be implemented at each individual user. Online algorithm is devised, which does not require the statistical knowledge of the channel fading and energy harvesting (EH) processes. Numerical results demonstrate the effectiveness of the centralized and distributed schemes for different delay constraints and EH settings.

Original languageEnglish
Title of host publication2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages6
ISBN (Electronic)9781467367820
Publication statusPublished - 3 Dec 2015
Externally publishedYes
EventIEEE International Symposium on Personal and Indoor Mobile Radio Conference 2015 - Hong Kong Convention and Exhibition Centre, Hong Kong, China
Duration: 30 Aug 20152 Sep 2015
Conference number: 26th (Proceedings)

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC


ConferenceIEEE International Symposium on Personal and Indoor Mobile Radio Conference 2015
Abbreviated titlePIMRC 2015
CityHong Kong
Internet address


  • Energy harvesting
  • multi-user system
  • optimal stochastic control
  • statistical delay constraints

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