Internet video delivery measurement and optimization

Within the next few years, a significantly larger fraction of video consumption will be delivered over the Internet, with some analysis reporting that video will expand to become 91% of all Internet traffic by 2014. The new Internet video ecosystem is being shaped by the convergence of a few important technological and societal trends. First, as broadband speeds continue to increase, it drives video bit rates projected to increase from 500 Kbps-2 Mbps today to 10Mbps-20Mbps. Second, users and content providers now have easy access to the devices, software, and infrastructure required to create online HD-quality videos. In parallel, the emergence of popular online services, such as Hulu, Netflix, iTunes, and YouTube, has made huge libraries of multimedia content easy to share and disseminate. Finally, users employ a wide range of devices, such as smartphones, tablets, Internet-connected TVs, and set-top-boxes for viewing video. The culmination of these trends means that we are in a position to design a easier-to-deploy and easier-to-evolve system than the 90s’ QoS/IP Multicast architecture which was designed under the assumption that the majority of traffic required network and server-level support for real-time QoS guarantees and IP multicast. Furthermore, the unprecedented scale of video adoption coupled with the ability to obtain fine-grained measurement insights from the client-side makes us uniquely positioned to leverage the power of “big data” techniques in network design.

In this project, we are working toward providing a critical understanding of the unique characteristics of the video delivery ecosystem, provide key insights into the critical quality bottlenecks that users face today, and how content providers can work around these quality problems.


  • [SIGCOMM] CS2P: Improving Video Bitrate Selection and Adaptation with Data-Driven Throughput Prediction
    Yi Sun, Xiaoqi Yin, Junchen Jiang, Vyas Sekar, Fuyuan Lin, Nanshu Wang, Tao Liu, Bruno Sinopoli
    to appear in SIGCOMM 2016
  • [SIGCOMM] Via: Improving Internet Telephony Call Quality Using Predictive Relay Selection
    Junchen Jiang, Rajdeep Das, Ganesh Ananthanarayanan, Philip A. Chou, Venkata Padmanabhan, Vyas Sekar,
    Esbjorn Dominique, Marcin Goliszewski, Dalibor Kukoleca, Renat Vafin, Hui Zhang
    to appear in SIGCOMM 2016
  • [NSDI] CFA: A Practical Prediction System for Video QoE Optimization
    Junchen Jiang, Henry Milner, Davis Shepherd, Vyas Sekar, Ion Stoica, Hui Zhang
    in NSDI 2016
  • [SIGCOMM] A Control-Theoretic Approach for Dynamic Adaptive Video Streaming over HTTP
    Xiaoqi Yin, Abhishek Jindal, Vyas Sekar, Bruno Sinopoli
    in SIGCOMM 2015
  • [NSDI] C3: Internet-Scale Control Plane for Video Quality Optimization
    Aditya Ganjam, Faisal Siddiqui, Jibin Zhan, Xi Liu, Ion Stoica, Junchen Jiang, Vyas Sekar, Hui Zhang
    in NSDI 2015
  • [CoNext] Trace-Driven Analysis of ICN Caching Algorithms on Video-on-Demand Workloads
    Yi Sun, Seyed K. Fayaz, Yang Guo, Vyas Sekar, Yun Jin, Mohamed-Ali Kaafar, and Steve Uhlig
    in CoNext 2014
  • [HotNets] Toward a Principled Framework to Design Dynamic Adaptive Streaming Algorithms over HTTP
    Xiaoqi Yin, Vyas Sekar, Bruno Sinopoli
    in HotNets 2014
  • [HotNets] EONA: Experience-Oriented Network Architecture
    Junchen Jiang, Vyas Sekar, Xi Liu, Ion Stoica, Hui Zhang
    in HotNets 2014
  • [HotNets] Leveraging Video Measurements to Generate a Real-Time Traffic Map for the Internet
    Yi Sun, Junchen Jiang, Vyas Sekar, Hui Zhang, Fuyuan Lin, Nanshu Wang
    in HotNets 2014
  • [SIGCOMM] Developing a Predictive Model of Quality of Experience for Internet Video
    Athula Balachandran, Vyas Sekar, Aditya Akella, Srinivasan Seshan, Ion Stoica, Hui Zhang
    in SIGCOMM 2013
  • [CONEXT] Improving Fairness, Efficiency, and Stability in HTTP-Based Adaptive Streaming with Festive
    Fast tracked to Transactions on Networking

    Junchen Jiang, Vyas Sekar, Hui Zhang
    in CoNext 2012
  • A Quest for an Internet Video Quality-of-Experience Metric
    Athula Balachandran, Vyas Sekar, Aditya Akella, Srinivasan Seshan, Ion Stoica, Hui Zhang
    in HotNets 2012
  • A Case for a Coordinated Internet-Scale Video Control Plane
    Xi Liu, Florin Dobrian, Henry Milner, Junchen Jiang, Vyas Sekar, Ion Stoica, Hui Zhang
    in SIGCOMM 2012
  • Understanding the Impact of Video Quality on User Engagement
    Selected for Communications of ACM Research Highlights

    Florin Dobrian, Vyas Sekar, Asad Awan, Ion Stoica, Aditya Ganjam, Dilip Joseph, Jibin Zhan, Hui Zhang.
    ACM SIGCOMM 2011
  • Inside the Birds Nest: Measurements of Large-Scale Live VoD from the 2008 Olympics
    Hao Yin, Xuening Liu, Feng Qiu, Chuang Lin, Vyas Sekar, Hui Zhang, Geyong Min
    in ACM/USENIX Internet Measurement Conference 2009
  • Design and Deployment of a Hybrid CDN-P2P System for Live Video Streaming: Experiences with LiveSky
    Best paper in systems track
    Hao Yin, Xuening Liu, Tongyu Zhan, Vyas Sekar, Hui Zhang
    in ACM Multimedia 2009
  • People

  • PI: Vyas Sekar, Bruno Sinopoli, Hui Zhang
  • PhD Students: Athula Balachandran, Junchen Jiang, Xiaoqi Yin