Packet-based power allocation for forward link data traffic

Peijuan Liu*, Randall A. Berry, Michael L. Honig, Scott Jordan

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We consider the allocation of power across forward-link packets in a wireless data network. The packets arrive according to a random (Poisson) process, and have fixed length so that the data rate for a given packet is determined by the assigned power and the channel gain to the designated user. Each user's service preferences are specified by a utility function that depends on the received data rate. The objective is to determine a power assignment policy that maximizes the time-averaged utility rate, subject to a constraint on the probability that the total power exceeds a limit (corresponding to an outage). For a large, heavily loaded network, we introduce a Gaussian approximation for the total transmitted power, which is used to decompose the power constraint into three more tractable constraints. We present a solution to the modified optimization problem that is a combination of admission control and pricing. The optimal trade-off between these approaches is characterized. Numerical examples illustrate the achievable utility rate and power allocation as a function of the packet arrival rate.

Original languageEnglish (US)
Pages (from-to)2894-2903
Number of pages10
JournalIEEE Transactions on Wireless Communications
Volume6
Issue number8
DOIs
StatePublished - Aug 2007

Keywords

  • Power assignment
  • Pricing
  • Resource allocation
  • Utility

ASJC Scopus subject areas

  • Engineering(all)
  • Computer Networks and Communications

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