Patent ID: 8140069

Claim:
A method to determine an audio fidelity of a call made on a cellular network, wherein the method is carried out by a radio access network (RAN) entity, the method comprising: the RAN entity receiving a first input, wherein the first input comprises a plurality of subjective mean opinion scores for a plurality of calls made on a network; the RAN entity receiving a second input, wherein the second input comprises a plurality of frame error rate values for the plurality of calls made on the network; the RAN entity receiving a third input, wherein the third input comprises a plurality of pilot signal strength values for the plurality of calls made on the network; transforming the plurality of frame error rate values, so as to create a plurality of transformed frame error rate values; the RAN entity transforming the plurality of pilot signal strength values, so as to create a plurality of transformed pilot signal strength values; the RAN entity using (i) the subjective mean opinion scores, (ii) the plurality of transformed pilot signal strength values, and (iii) the plurality of transformed frame error rate values in a non-linear regression to define an equation for an objective mean opinion score, wherein the objective mean opinion score is indicative of the audio fidelity of a call made on the network; and the RAN entity using the equation to calculate an objective mean opinion score for a call made on the network.