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System and method for determining the audio fidelity of calls made on a cellular network using frame error rate and pilot signal strength

  • US 8,140,069 B1
  • Filed: 06/12/2008
  • Issued: 03/20/2012
  • Est. Priority Date: 06/12/2008
  • Status: Expired due to Fees
First Claim
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1. 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.

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