Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-04-25
2006-04-25
Perez-Gutierrez, Rafael (Department: 2686)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S562100, C342S153000, C342S463000
Reexamination Certificate
active
07035651
ABSTRACT:
A process is proposed for determining the radio reception direction on the downlink at a radio base station location, comprising a plurality of radio coverage areas, in a mobile communications network, in which in each area on the downlink radio signals are radiated by means of a transmitting antenna for reception by at least one mobile communications terminal. For the determination of the radio reception direction, at least the reception levels of the radio signals radiated by a first and a second of the transmitting antennae are measured by the relevant mobile communications terminal. From the two measured reception levels, a ratio value is formed which is independent of the prevailing radio propagation conditions, and this ratio value is used to effect an estimation of azimuthal angles for the radio reception direction to be determined. The invention can thus be implemented in any individual radio base station location, it being unnecessary for there to be contact with a plurality of radio base stations. The calculation of a ratio value serves to eliminate influences which can arise from changing radio propagation conditions. In this way a reliable estimation of the azimuthal angles and determination of the radio reception direction is possible. This is independent of the prevailing radio propagation conditions.
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Schreiner Matthias
Tangemann Michael
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