A simulation of cellular system growth and its effect on urban in-building parasitic frequency reuse

Theodore S. Rappaport, Robert A. Brickhouse

Research output: Contribution to journalArticle


Indoor parasitic cellular systems reuse the same frequencies as outdoor cellular (macrocellular) systems to provide wireless communications inside a building or campus. This paper provides a simulation strategy to determine future channel availability that is possible between in-building and outdoor cellular systems that share the same radio spectrum. Capacity that is currently available inside an urban office building is first derived from field-strength measurements of all the channels in the macrocellular system made inside the building. We then create a simulation that determines the effect of a growing outdoor cellular system on in-building frequency reuse. Future in-building frequency reuse is predicted over a 6-yr timeline in 3-mo intervals and includes the effect of height above ground inside the building. Results show that indoor reuse is practical as long as interference levels of about -85 dBm can be tolerated from the outdoor macrocellular system.

Original languageEnglish (US)
Pages (from-to)273-285
Number of pages13
JournalIEEE Transactions on Vehicular Technology
Issue number1
StatePublished - Dec 1 1999



  • In-building wireless
  • Parasitic cellular
  • Siteplanner
  • Spectrum sharing
  • WPBX

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics

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