Author: Johanna Sochos

An expert with over 12 years of experience in signal processing and algorithm development, Johanna Sochos enjoys the analysis of large amounts of complex data and the design of smart algorithms to retrieve and analyze data. She is fascinated by the creation of models that reflect the network quality as perceived by humans. With a master’s degree in physics, the Senior Research Engineer is responsible for the specification of requirements for application and data tests. In her blog posts, Johanna Sochos examines just that – the design and evaluation of data and app tests.

By | June 10, 2020 | 601 views

Interactivity test: Examples from real 5G networks (part 3)

After discussing the shift of focus in QoE measurements in 5G networks, introducing the concept of interactivity, and explaining our test approach, we will conclude this 3-part series with measurement examples from real networks, including 5G. We will show the interactivity test in action and present test results from different real field measurements. Before going further, let us briefly revisit…

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By | April 30, 2020 | 580 views

Interactivity test: Concept and KPIs (part 2)

In the first part of this series, we discussed how the focus of QoE measurements in 5G networks shifted to measuring the quality of actively used services and introduced the concept of interactivity. We have defined the interactivity of a network as the measurable continuity and latency of a given bit rate. Now, we will look into interactivity measurements, traffic…

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By | April 14, 2020 | 733 views

Interactivity test: QoS/QoE measurements in 5G (part 1)

Most users have the impression that 5G will just provide more data rate. This is true; the transport capacity will increase due to the additional spectrum made available to operators through the licensing of 5G frequencies. This will surely improve the download experience, especially in heavily loaded areas. However, 5G is more than just more data rate. The main advantage…

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By | February 19, 2020 | 847 views

Network Performance Score: How to conduct NPS benchmarking campaigns

The Network Performance Score (NPS) reflects the perceived technical performance of a mobile network or one of its subsets such as region, period, or technology. The overall NPS score is the combination of carefully considered and weighted main key performance indicators (KPI) for a wide range of services that are essential and exemplary for service quality. But what needs to…

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By | March 19, 2018 | 2,187 views

Measuring QoE of mobile data apps for network optimization (part 3)

How can mobile app testing support network optimization? In previous posts, we explained how you could assess the QoE of data applications on smartphones by measuring the success rate and duration of a series of actions. Based on large-scale real field measurement data, we showed how the duration saturates at higher available network speeds and examined the causes of this…

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By | March 1, 2018 | 1,749 views

Measuring QoE of mobile data applications: Behind the scenes (part 2)

In the previous post, we explained how to measure QoE of mobile data applications on smartphones by means of success rate and the duration of a series of actions. Based on large-scale real field data, we showed how the duration saturates at higher available network speeds. But where does saturation come from? And what is going on in the background,…

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By | February 22, 2018 | 1,959 views

Measuring QoE of mobile data applications, e.g. Facebook (part 1)

Today, there are a huge number of apps available for smartphones covering almost any use case one can think of. Network providers want to ensure that their mobile connection offers everyone a smooth user experience, especially for the most popular smartphone apps such as Facebook. To do this, they need tests targeting mobile data applications, such as Facebook and Dropbox….

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