I am a Ph.D. candidate in the Computer Science Department at Carnegie Mellon University, and I expect to graduate in the spring of 2017. I am advised by Vyas Sekar and Hui Zhang. Before CMU, I received Bachelor in Computer Science from Yao Class at Tsinghua in 2011.

My research interests include computer networks, distributed systems, big data, and cloud computing.

I am currently on the academic job market.
Curriculum Vitae
Research Statement
Application Materials

Thesis Research

The theme of my thesis work is to optimize Internet performance by big data techniques.

Motivation: Today’s Internet is an "eyeball economy" dominated by applications such as video streaming (e.g., Netflix counts for 37% of Internet traffic) and VoIP (e.g., Skype users spend over 2 billion minutes talking to each other every day). With these applications relying on user engagement to generate revenues, it is crucial to maintain high user-perceived Quality of Experience (QoE) for these applications.

Approach: My dissertation demonstrates that data-driven techniques can improve Internet QoE by utilizing a centralized real-time view of performance across millions of endpoints (clients). There are three key pieces in my thesis:

  • Improving QoE via Expressive Prediction Models
    [NSDI '16] "CFA: A Practical Prediction System for Video Quality Optimization" J. Jiang, V. Sekar, H. Milner, D. Shepherd, I. Stoica, H. Zhang
  • Improving QoE in the Face of Large Decision Spaces
    [SIGCOMM '16] "VIA: Improving Internet Telephony Call Quality Using Predictive Relay Selection" J. Jiang, R. Das, G. Anathanarayanan, P. Chou, V. Padmanabhan, V. Sekar, E. Dominique, M. Goliszewski, D. Kukoleca, R. Vafin, H. Zhang
  • Improving QoE via Exploration and Exploitation at Scale
    [NSDI '17] "Pytheas: Enabling Data-Driven Quality of Experience Optimization Using Group-Based Exploration-Exploitation" J. Jiang, S. Sun, V. Sekar, H. Zhang

  • Impact: CFA and VIA have been used in industry by Conviva and Skype, companies that specialize in QoE optimization for video streaming and VoIP, respectively.

    Recent Publications

    A complete list of my publications can be found in CV.







    Early publications