Cost/Revenue Optimization of WiMAX Networks with Relay Power Saving Modes: MeasurementBased Scenario in a Hilly Region

Fernando J. Velez*, Joao Oliveira, Daniel Robalo, Oliver Holland, A. Hamid Aghvami

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paper


This paper investigates cell zooming and relaying in conjunction with the use of opportunistic sleep modes to save energy at times of low load in WiMAX network deployments. It performs extensive propagation measurements in a hilly area of Covilha, Portugal, in order to present a realistic and topographically challenging scenario in which to perform dynamic optimizations. It describes these measurements and their methodology in detail. Based on this scenario, it then investigates the performance achievable by networks that are deployed in various sectorization configurations with and without relays, and matches this to varying traffic loads at different times of the day to maximise the use of sleep modes, where possible, by relays, also in consideration of coverage constraints. Results demonstrate that savings typically of 47.6% in relays' average power consumption can be achieved. These savings are shown to map to a financial saving for the operator of 10% in operation and maintenance cost combined. It is also demonstrated that such solutions have to be used cautiously in such hilly regions due to challenges in maintaining coverage.

Original languageEnglish
Title of host publication2012 IEEE GLOBECOM WORKSHOPS (GC WKSHPS)
Place of PublicationNEW YORK
Number of pages6
ISBN (Print)978-1-4673-4941-3
Publication statusPublished - 2012
EventIEEE Globecom Workshops (GC Wkshps) - Anaheim, Canada
Duration: 3 Dec 20127 Dec 2012

Publication series

NameIEEE Globecom Workshops
ISSN (Print)2166-0069


ConferenceIEEE Globecom Workshops (GC Wkshps)


  • Broadband communication
  • WiMAX
  • cellular planning
  • economics
  • relays
  • green communications
  • cell zooming


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