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Method for automatically selecting channel powers in a wireless communication system

  • US 5,859,839 A
  • Filed: 06/30/1997
  • Issued: 01/12/1999
  • Est. Priority Date: 06/30/1997
  • Status: Expired due to Fees
First Claim
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1. In a wireless communication system having a plurality of base stations within a geographic area, each of the plurality of base stations having a pilot-channel and a service area associated therewith, a method for automatically selecting a power of each of the pilot-channels, the method comprising the steps of:

  • defining a plurality of points within the geographic area;

    setting a control parameter to an initial value;

    establishing an initial power of each of the pilot-channels;

    based on the established initial powers, determining, at each of the plurality of points, an interference level associated with each of the pilot-channels to form a first array;

    based on the selected initial powers, identifying, at each of the plurality of points, a number of the pilot-channels which are receivable, to form a second array;

    evaluating a system performance metric, the system performance metric based on the first array and the second array;

    randomly selecting one of the pilot-channels;

    changing the power of the selected one pilot-channel;

    after the step of changing, updating the first and second arrays;

    based on the updated first and second arrays, re-evaluating the system performance metric;

    based on the re-evaluation, accepting or rejecting the changed power of the selected one pilot-channel, to form a preferred set of pilot-channel power values;

    repeating, a predetermined number of times, the step of randomly selecting through the step of accepting or rejecting;

    adjusting the control parameter;

    repeating, until the control parameter reaches a predetermined threshold, the step of randomly selecting through the step of adjusting; and

    downloading the preferred set of pilot-channel values to the wireless communication system.

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