Stochastic Differential Games and Energy-Efficient Power Control

François Mériaux, Samson Lasaulce, Hamidou Tembine

Research output: Contribution to journalArticlepeer-review

Abstract

One of the contributions of this work is to formulate the problem of energy-efficient power control in multiple access channels (namely, channels which comprise several transmitters and one receiver) as a stochastic differential game. The players are the transmitters who adapt their power level to the quality of their time-varying link with the receiver, their battery level, and the strategy updates of the others. The proposed model not only allows one to take into account long-term strategic interactions, but also long-term energy constraints. A simple sufficient condition for the existence of a Nash equilibrium in this game is provided and shown to be verified in a typical scenario. As the uniqueness and determination of equilibria are difficult issues in general, especially when the number of players goes large, we move to two special cases: the single player case which gives us some useful insights of practical interest and allows one to make connections with the case of large number of players. The latter case is treated with a mean-field game approach for which reasonable sufficient conditions for convergence and uniqueness are provided. Remarkably, this recent approach for large system analysis shows how scalability can be dealt with in large games and only relies on the individual state information assumption.

Original languageEnglish (US)
Pages (from-to)3-23
Number of pages21
JournalDynamic Games and Applications
Volume3
Issue number1
DOIs
StatePublished - Mar 2013

Keywords

  • Differential games
  • Energy efficiency
  • Mean-field games
  • Power control
  • Wireless networks

ASJC Scopus subject areas

  • Statistics and Probability
  • Computer Science Applications
  • Computer Graphics and Computer-Aided Design
  • Computational Theory and Mathematics
  • Computational Mathematics
  • Applied Mathematics

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