Game theory and power control in ultrawideband networks

Giacomo Bacci, Marco Luise, H. Vincent Poor

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

This paper describes a theoretical framework for the design and analysis of power control algorithms for high-throughput wireless networks using ultrawideband (UWB) technologies. The tools of game theory are shown to be expedient for deriving scalable, energy-efficient, distributed power control schemes to be applied to a population of battery-operated user terminals in a rich multipath environment. In particular, the power control issue is modeled as a dynamic noncooperative game in which each user chooses its transmit power so as to maximize its own utility, which is defined as the ratio of throughput to transmit power. Although distributed (noncooperative) control is known to be suboptimal with respect to the optimal centralized (cooperative) solution, it is shown via large-system analysis that the game-theoretic distributed algorithm based on Nash equilibrium exhibits negligible performance degradation with respect to the centralized socially optimal configuration. The framework described here is general enough to also encompass the analysis of code division multiple access (CDMA) systems and to show that UWB slightly outperforms CDMA in terms of achieved utility at the Nash equilibrium.

Original languageEnglish (US)
Pages (from-to)21-39
Number of pages19
JournalPhysical Communication
Volume1
Issue number1
DOIs
StatePublished - Mar 1 2008

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • Energy efficiency
  • Frequency-selective multipath
  • Game theory
  • Impulse radio
  • Large-system analysis
  • Nash equilibrium
  • Power control
  • Ultrawideband

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