Utility-based power control for a two-cell CDMA data network

Chi Zhou*, Michael L. Honig, Scott Jordan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Power allocation across users in two adjacent cells is studied for a code-division multiple access (CDMA) data service. The forward link is considered and cells are modeled as one-dimensional with uniformly distributed users and orthogonal signatures within each cell. Each user is assumed to have a utility function that describes the user's received utility, or willingness to pay, for a received signal-to-interference-plus-noise ratio (SINR). The objective is to allocate the transmitted power to maximize the total utility summed over all users subject to power constraints in each cell. It is first shown that this optimization can be achieved by a pricing scheme in which each base station announces a price per unit transmitted power to the users, and each user requests power to maximize individual surplus (utility minus cost). Setting prices to maximize total revenue over both cells is also considered, and it is shown that, in general, the solution is different from the one obtained by maximizing total utility. Conditions are given for which independent optimization in each cell, which leads to a Nash equilibrium (NE), is globally optimal. It is shown that, in general, coordination between the two cells is needed to achieve the maximum utility or revenue.

Original languageEnglish (US)
Pages (from-to)2764-2775
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume4
Issue number6
DOIs
StatePublished - Nov 2005

Keywords

  • CDMA
  • Data service
  • Forward link
  • Power control
  • Pricing
  • Resource allocation
  • Revenue
  • Surplus
  • Utility

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Fingerprint Dive into the research topics of 'Utility-based power control for a two-cell CDMA data network'. Together they form a unique fingerprint.

Cite this