Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Patent
1997-11-10
1999-12-21
Chin, Wellington
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
455423, 455 673, 455524, 455422, 375227, 375221, 375220, H04Q 720, H04Q 1700
Patent
active
060060735
ABSTRACT:
The radio transmission system includes at least one base station (BS1,BS2) and several participant stations (T111, . . . ,T222), in which the radio transmission range (Z1,Z2) belonging to each base station (BS1, BS2) is divided into several sectors (S11, . . . ,S22). The radio transmission system performs an automatic interference analysis in which a test channel is established between each participant station (T111, . . . ,T222) and all those sectors (S11, . . . ,S22) which cause interferences with the concerned participant station. A signal path-attenuation value is determined from the transmission power and received power of the test channel for each signal path between the participant stations (T111, . . . ,T222) and sectors (S11, . . . ,S22) and a carrier signal-to-noise ratio is determined for each participant station (T111, . . . ,T222) from all the signal path attenuation values contributing to it. When this carrier signal-to-noise ratio is below a predetermined threshold, a more robust type of modulation is used for the data signal transmission between the concerned participant station (T111, . . . ,T222) and the sector (S11, . . . ,S22) associated with it and/or the transmitted signal carrier is changed to another different frequency channel, for at least the sector (S11, . . . ,S22) which causes the greatest interference.
Bollmann Andreas
Eckstein Tillmann
Glauner Martin
Chin Wellington
Nguyen Simon
Robert & Bosch GmbH
Striker Michael J.
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