An Integrated Propagation-Mobility Interference Model for Microcell Network Coverage Prediction

  • Authors:

  • Brendan C. Jones;David J. Skellern

  • Affiliations:

  • Electronics Department, School of Maths, Physics, Computing and Electronics, Macquarie University, NSW 2109 Australia. e-mail: brendan@mpce.mq.edu.au, and daves@mpce. mq.edu.au;Electronics Department, School of Maths, Physics, Computing and Electronics, Macquarie University, NSW 2109 Australia. e-mail: brendan@mpce.mq.edu.au, and daves@mpce. mq.edu.au

  • Venue:
  • Wireless Personal Communications: An International Journal
  • Year:
  • 1997

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Abstract

This paper presents a new interference model for microcellularnetworks which integrates radio propagation parameters and user terminal mobility. This model uses a parameter denoted the ’’interference to noise ratio‘‘ (INR) toobtain a simplified description of mobile link outage contours as a function ofthe location of the fixed and mobile radio ports. The INR is used todemonstrate that microcell networks are more interference limited than macrocellnetworks, and thus are more affected by user terminal mobility. Expressions arederived for the INR and user terminal cell radius distributions.It is shown that in microcell systems a significant proportion ofterminals may not be able to meet a contiguous coverage criterion, and that closermicrocell spacing can reduce rather than improve the coverage quality. Examination of cochannel and adjacent channel reuse ratios in DCA microcell systemssuggest that the closer frequency reuse is primarily responsible for thesecoverage effects. Monte Carlo simulations are used to test the analytical theory. These results may form the basis of a design methodology for microcellsystems.