Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-09-18
2000-09-12
Eisenzopf, Reinhard J.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455 671, H04Q 720
Patent
active
061190098
ABSTRACT:
Techniques for predicting RF signal propagation in indoor environments are disclosed. A typical technique comprises six distinct phases. In one phase, the mean wall separation, d, of one floor of a building is estimated. In a second phase, a reflection coefficient, s, is estimated for the floor in general. In a third phase, a number of trial RF propagation measurements are made to gather empirical data about the RF propagation characteristics of the floor. In the fourth phase, the mean wall separation, d, the reflection coefficient, s, and the trial RF propagation measurements are fit, using well-known techniques, into a wireless propagation model, such as ##EQU1## where P(r) is the measured or predicted power at a distance, r, from the transmitter, ##EQU2## and .xi. is the parameter that is fit to the empirical data. In the fifth phase the wireless propagation model is used to predict the RF signal strength throughout the floor from a base station at a given location, and in the six phase one or more base stations are installed in the building based on the results predicted by the wireless propagation model. The fifth and sixth phases can be thereafter repeated for other building with sufficiently similar characteristics.
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Baranger Harold Urey
Ullmo Denis Jacques
Banks-Harold Marsha D.
Breyer Wayne S.
DeMont Jason Paul
Eisenzopf Reinhard J.
Lucent Technologies - Inc.
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