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US 6,285,664 B1Granted
Method and apparatus for estimating pilot coverages
AssigneeLucent Technologies Inc.
InventorsNeil E. Bernstein, Xiao Cheng Wu
Life of this patent
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AssigneeLucent Technologies Inc.
InventorsNeil E. Bernstein, Xiao Cheng Wu
Estimating the term…
A method and system that minimizes pilot signal overlap and radio frequency (“RF”) interference by estimating changes in pilot coverage for different traffic channel loading and power conditions. Once base stations are positioned, a terminal for measuring received pilot signal strengths, such as a mobile station or pilot scanner, is used to collect and generate the baseline pilot survey data, which is then stored on a disk or tape. Base station transmit pilot EC/IOs, i.e., traffic channel loads on forward links, are also stored on disk or tape. The invention uses two adjustment factors associated with transmit power and traffic channel loading to optimize for different RF conditions, specifically for different base station transmit power or forward link loading conditions. For each RF condition, the methodology calculates the changes in the baseline pilot survey data. This reflects what EC/IOs a mobile station would receive under the given conditions. The systems engineer collects a set of optimized base station power settings for each of the different traffic channel load conditions. One of these optimized power settings is then selected by the systems engineer for each of the base stations.
In a wireless communications system having base stations and means for generating baseline pilot survey data and base station initial traffic loading information, a method for establishing base station transmit power levels for different operating conditions, said method comprising the steps of:
In a wireless communications system having at least one base station and means for generating mobile received EC/IOs and initial transmit EC/IOs, a method for optimizing interference under different power and loading conditions, said method comprising the steps of:
In a wireless communications system having base stations and a mobile radio, a device for optimizing radio frequency interference under different power and loading conditions, said device comprising:
A system for estimating pilot coverages for different operating conditions, said system comprising:
Dependencies are inferred from the claim text.