Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-05-22
2000-12-05
Urban, Edward F.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455 675, 455 673, 4552261, 704216, 704237, H04Q 720, H04B 1700, G10L 1500
Patent
active
061578304
ABSTRACT:
A method and system for measuring the speech quality in a mobile cellular telecommunications network using available radio link parameters is disclosed herein. In a preferred embodiment, the method includes receiving a set of radio link parameters, as defined in a standard or otherwise available, such as the BER, FER, RxLev, handover statistics, soft information, and speech energy. Temporal information is obtained from the radio link parameters to create a set of temporal parameters which can be statistically analyzed, for example, for the maximum and minimum, mean, standard deviation, and autocorrelation values for a time interval. The temporal parameters are combined to yield a set of correlated parameters that are more closely related to the speech quality. An estimator then uses the correlated parameters to calculate an estimate for the speech quality. The method of the present invention takes advantage of temporal information and correlated relationships from the transmitted parameters. Furthermore, the method is inherently simple and reliable as compared to prior art methods. Still further, the technique provides a method that allows operators to monitor quality conditions throughout the network.
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Heikkil.ang. Per Gunnar
Karlsson Per Anders
Minde Tor Bjorn
Uvliden Anders Tomas
Perez-Gutierrez Rafael
Telefonaktiebolaget LM Ericsson
Urban Edward F.
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