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Method for assigning frequency channels in a cellular communication system and for identifying critical existing fixed microwave receivers that restrict operation of such a system

  • US 5,497,503 A
  • Filed: 05/28/1993
  • Issued: 03/05/1996
  • Est. Priority Date: 05/28/1993
  • Status: Expired due to Term
First Claim
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1. A method for assigning frequency channels to a plurality of base stations in a cellular communication system that coexists with a set of pre-existing fixed site receivers, separate from the cellular communication system, said method comprising the following steps:

  • a) grouping the base stations into a plurality of clusters, each cluster comprising a set of base stations;

    b) grouping a plurality of potential frequency channels into a plurality of channel blocks;

    c) assigning a usage parameter to each cluster indicative of how many base stations within the respective cluster are operable within a given channel block;

    d) operating a computer model to predict whether aggregate interference from the base stations and associated handsets at the pre-existing fixed site receivers would be excessive;

    e) revising the usage parameters for at least some of the clusters to reduce the number of base stations within the respective cluster that are operable within an interfering channel block;

    f) repeating steps d) and e) until the predicted aggregate interference from the base stations and associated handsets at the pre-existing fixed site receivers is no longer excessive; and

    theng) assigning potential frequency channels to the base stations in accordance with the usage parameters as determined in step e).

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