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    Lehrstuhl für Informatik III

    Research Area: QoE Monitoring in the Cloud

    QoE Monitoring with VNFs (Virtual Network Functions) in the Cloud

      In order to consider Quality of Experience (QoE) for orchestration and consolidation in a cloud management architecture, proper QoE monitoring functions are required. They can be applied either in long term or short term management components and provide the platform with information about the service quality perceived by the end users.

      The component is able to monitor all the video flows passing through from the streaming server to the client. We use a proxy program to route video traffic to the VNF. The video traffic from the streaming server is captured by our component. It is a software which utilizes a Python or C++ library, namely Scapy and libpcap. These open source software libraries provide real time packet sniffing and decoding. To analyze the video flows, we designed an algorithm, which eventually provides us with an estimated video buffer, stalling frequency and length based on download timestamps of video segments. The QoE for video streaming is calculated based on a reference QoE model. To validate the estimated values, we simultaneously sample the video buffer, stalling frequency and length at the client browser by using a Javascript-based web API. The discrepancy between the estimated and actual values shows the level of accuracy of the monitoring. More details of the estimation algorithm can be found in the publications.

    Researchers:

    Lam Dinh-Xuan
    Dr. Florian Wamser
    ,

    Publications

    2017

    • Seufert, M., Wehner, N., Wamser, F., Casas, P.: YouTube QoE Monitoring with YoMoApp: a Mobile App for Crowdsourced YouTube QoE Analysis, (2017).
       
    • Schwind, A., Seufert, M., Alay, Ö., Casas, P., Tran-Gia, P., Wamser, F.: Concept and Implementation of Video QoE Measurements in a Mobile Broadband Testbed. IEEE/IFIP Workshop on Mobile Network Measurement (MNM’17). , Dublin, Ireland (2017).
       
    • Dinh-Xuan, L., Seufert, M., Wamser, F., Tran-Gia, P.: Study on the Accuracy of QoE Monitoring for HTTP Adaptive Video Streaming Using VNF. 1st IFIP/IEEE International Workshop on Quality of Experience Management (QoE-Management). , Lisbon, Portugal (2017).
       

    2016

    • Seufert, M., Casas, P., Wamser, F., Wehner, N., Schatz, R., Tran-Gia, P.: Application-Layer Monitoring of QoE Parameters for Mobile YouTube Video Streaming in the Field. IEEE 6th International Conference on Communications and Electronics (ICCE). , Ha Long, Vietnam (2016).
       

    2015

    • Seufert, M., Wamser, F., Casas, P., Irmer, R., Tran-Gia, P., Schatz, R.: On the Monitoring of YouTube QoE in Cellular Networks from End-devices, (2015).
       
    • Seufert, M., Wamser, F., Casas, P., Irmer, R., Tran-Gia, P., Schatz, R.: On the Monitoring of YouTube QoE in Cellular Networks from End-devices, (2015).
       
    • Wamser, F., Seufert, M., Casas, P., Irmer, R., Tran-Gia, P., Schatz, R.: YoMoApp: a Tool for Analyzing QoE of YouTube HTTP Adaptive Streaming in Mobile Networks. European Conference on Networks and Communications (EuCNC). , Paris, France (2015).
       

    2013

    • Casas, P., Seufert, M., Schatz, R.: YOUQMON: A System for On-line Monitoring of YouTube QoE in Operational 3G Networks. 31st International Symposium on Computer Performance, Modeling, Measurements and Evaluation (IFIP Performance). , Vienna, Austria (2013).
       
    • Casas, P., Schatz, R., Hoßfeld, T.: Monitoring YouTube QoE: Is Your Mobile Network Delivering the Right Experience to your Customers? 2013 IEEE Wireless Communications and Networking Conference (WCNC 2013). , Shanghai, China (2013).
       

    2012

    • Schatz, R., Hoßfeld, T., Casas, P.: Passive YouTube QoE Monitoring for ISPs. Best Paper Award at Workshop on Future Internet and Next Generation Networks (FINGNet-2012). , Palermo, Italy (2012).
       

    Student Works and Theses

    2018

    • Gensler, T.: Concept an Implementation of QoE Measurements for Audio Streaming in Spotify, (2018).
       

    2017

    • Wehner, N.: Unsupervised QoE Field Study for Mobile YouTube Video Streaming with YoMoApp, (2017).
       
    • Popp, C.: Study on the Accuracy of Video Monitoring VNF in High Mobility Environments, (2017).
       
    • Schwind, A.: Concept and Implementation of QoE Measurements in a Mobile Broadband Testbed, (2017).
       

    2016

    • Zorn, F.: Methods for Improving the Qualitiy of Experience of Mobile Video Streams, (2016).
       

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