Method for automatically selecting channel powers in a wireless communication system
First Claim
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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Abstract
The method operates in a wireless communication system serving a geographic area. The system includes first and second communication units within the geographic area which have first and second radio frequency (RF) channels associated therewith. The method includes defining a plurality of points within the geographic area; selecting an initial power of the first and second RF channels; identifying, at each of the plurality of points, a number of the first and second RF channels which are receivable; evaluating a system performance metric; adjusting the initial power of one of the first and second RF channels; based on the adjusted power re-identifying, at each of the plurality of points, a number of the first and second RF channels which are receivable; re-evaluating the system performance metric; based on the re-evaluation, accepting the adjusted power; and downloading the adjusted power to the wireless communication system.
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Citations
18 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification