Wireless link adaptation policies: QoS for deadline constrained traffic with imperfect channel estimates

Tim Holliday, Andrea Goldsmith, Peter Glynn

Research output: Contribution to journalConference articlepeer-review

16 Scopus citations

Abstract

We present an optimal power and rate control policy for delay constrained traffic in next generation TDMA wireless systems. Our solution minimizes average transmit power while satisfying a constraint on the distribution of packets lost to deadline expiration. We also provide a means to account for erroneous and delayed channel estimates. Our results show the optimal power and rate adaptation may change dramatically as mobile speed and channel estimate delay increase. Finally, we present results from a simulation of a GSM EDGE mobile. This simulation incorporates industry standard wireless channels and performance data available from the Third Generation Partnership Project. When compared to the standard Fixed-SIR power control policy, our algorithm provides a significant reduction in power consumption and mitigates some of the negative effects of delayed channel estimates.

Original languageEnglish (US)
Pages (from-to)3366-3371
Number of pages6
JournalIEEE International Conference on Communications
Volume5
StatePublished - 2002
Externally publishedYes
Event2002 International Conference on Communications (ICC 2002) - New York, NY, United States
Duration: Apr 28 2002May 2 2002

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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