User Experience to
the Next level
However, to measure Quality of Experience (QoE) is far from straightforward. It requires a testing platform with the right algorithms and resources. Once part of the test process, QoE metrics can be correlated with traditional KPIs to give a better picture of the service quality. Some of the benefits of Segron ATF as a testing platform for service verification are
- Simultaneous QoS and QoE test cases for service verification.
- Testing under controlled radio environment for sensitivity analysis.
- Storage of device recordings as part of test results.
QoE is an entirely loosely defined concept, and the effort to measure such quantities varies. So can call setup time to be considered a QoE?
It is straightforwardly measured in Segron ATF through automated call handling. From the time it takes after pressing the Call button once dialing a second device to the moment the second device is alerted. In general, QoE is not necessarily reflected in QoS measurements, or more precisely, good QoS values are necessary but not sufficient for good QoE results. The reason for this is twofold:
Measuring Audio Quality as critical part in User Experience
Measuring audio QoE is much more intricate because many factors are affecting audio quality and its perception. POLQA is the de-facto global standard for voice quality measurements. It builds on an algorithm that considers raw test and reference samples and the bandwidth of the speech path, type of speech coding, whether noise suppression, frequency compensation, and scaling are used, among others. The result is presented on a five-point opinion scale, known as the Mean Opinion Score Listening Quality Subjective (MOS-LQS), thus ranging from 1 (bad) to 5 (excellent).
Equally important is the quality of supporting infrastructure, to ensure that as little distortion as possible is added to the test audio sample.
Segron ATF audio architecture is built on the Audio Matrix, which consists of hardware and software components integrated with ATF giving among others the following advantages:
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