Speech quality measurement in mobile telecommunication networks based on radio link parameters
First Claim
1. A method of estimating the speech quality as perceived by an end user in a radio telecommunication system comprising the steps of:
- receiving a radio signal including a plurality of radio link parameters associated with said signal;
processing temporal information from said radio link parameters to calculate a set of temporal parameters;
correlating said radio link parameters with said temporal parameters to produce a set of correlated parameters; and
estimating the speech quality from the correlated parameters with an estimator.
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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.
50 Citations
25 Claims
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1. A method of estimating the speech quality as perceived by an end user in a radio telecommunication system comprising the steps of:
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receiving a radio signal including a plurality of radio link parameters associated with said signal; processing temporal information from said radio link parameters to calculate a set of temporal parameters; correlating said radio link parameters with said temporal parameters to produce a set of correlated parameters; and estimating the speech quality from the correlated parameters with an estimator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 24)
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16. A system for measuring the speech quality as perceived by an end user in a radio telecommunication network comprising:
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a temporal processor for extracting temporal information from a set of available radio link parameters associated with a received radio signal, wherein said temporal processor generates a set of temporal parameters relating to speech quality; a correlation processor for determining the correlation between radio link parameters and temporal parameters to generate a set of correlated parameters; and an estimator for determining an estimate of the speech quality from generated parameters and radio link parameters. - View Dependent Claims (15, 17, 18, 19, 20, 21, 22, 23)
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25. A method for estimating the speech quality in a communications network comprising the steps of:
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receiving a set of radio link parameters associated with a received radio signal; temporally processing said radio link parameters to generate a set of temporal parameters, wherein said temporal parameters have a higher correlation with said speech quality than said radio link parameters; correlating said temporal parameters and said radio link parameters to generate a set of correlated parameters; and estimating said speech quality from the correlated parameters with an estimator.
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Specification