Hyunseok Chang

Murray Hill, NJ, USA
Distinguished Member of Technical Staff

Research Interests


Hyunseok Chang has been with Bell Labs since 2009 working on systems research related to distributed cloud archcitectures, software defined networking, high-performance data center networking, and IoT.  Prior to joining Bell Labs, Chang was a software architect at a technology startup specialized in over-the-top live media streaming.


  • Ph.D. in Computer Science and Engineering, University of Michigan
  • M.S.E. in Computer Science and Engineering, University of Michigan
  • B.S. in Electrical Engineering, Seoul National University, Korea (R.O.K)

Selected articles and publications

  • R. Li, M. Du, Z. Wang, H. Chang, S. Mukherjee, Eric Eide, "LongTale: Toward Automatic Performance Anomaly Explanation in Microservices", best paper award (research track), ACM/SPEC ICPE 2022.
  • H. Chang, M. Varvello, F. Hao, S. Mukherjee, "Can You See Me Now? A Measurement Study of Zoom, Webex, and Meet", best paper runner-up, ACM IMC 2021.
  • H. Chang, F. Hao, T.V. Lakshman, S. Mukherjee, L. Wang, "Cache-Friendly IP Reassembly Network Function", ACM SOSR, 2020.
  • Z. Zaheer, H. Chang, S. Mukherjee, J. Van der Merwe, "EZTrust: Network-Independent Zero-Trust Perimeterization for Microservices", ACM SOSR 2019.
  • H. Chang, M. Kodialam, T.V. Lakshman, S. Mukherjee, "Microservice Fingerprinting and Classification using Machine Learning", IEEE ICNP 2019.
  • J. Cho, H. Chang, S. Mukherjee, T.V. Lakshman, J. Van deer Merwe, "Typhoon: An SDN-Enhanced Real-time Big Data Framework", ACM CoNEXT 2017.
  • Y. Le, H. Chang, S. Mukherjee, L. Wang, A. Akella, M. Swift, T.V. Lakshman, "UNO: Unifyong Host and Smart NIC Offload for Flexible Packet Proceessing", ACM SoCC 2017.
  • D. Yun, H. Chang, T.V. Lakshman, "Accelerating Vision-based 3D Indoor Localization by Distributing Image Processing over Space and Time", ACM Virtual Reality Software and Technology, 2014.
  • H. Chang, A. Hari, S. Mukherjee, T. V. Lakshman, "Bringing the Cloud to the Edge", IEEE INFOCOM 2014 Workshop on Mobile Cloud Computing, 2014.
  • H. Chang, M. Kodialam, T. V. Lakshman, S. Mukherjee, L. Wang, "Building Access-Oblivious Cloud Storage for Enterprise", USENIX Workshop on Hot Topics in Management of Internet, Cloud, and Enterprise Networks and Services, 2012.
  • W. Wang, H. Chang, A. Goodman, E. Wucherer, S. Jamin, "Managing Digital Rights for P2P Live Broadcast and Recording on the Internet", IEEE/ACM Transactions on Multimedia, 2012.
  • H. Chang, M. Kodialam, R. R. Kompella, T. V. Lakshman, M. Lee, S. Mukherjee, "Scheduling in MapReduce-like Systems for Fast Completion Time", IEEE INFOCOM 2011.
  • H. Chang, S. Jamin, W. Wang, "Live Streaming with Receiver-based Peer-division Multiplexing", IEEE/ACM Transactions on Networking, 2011.


  • H. Chang, A. Hari, S. Mukherjee, T.V. Lakshman, "Design and Architecture of a Software Defined Proximity Cloud," Advances in Mobile Cloud Computing Systems, CRC Press, 2015.


  • "Ad Hoc Service Switch-based Control oF Ad Hoc Networking", US 11,363,653 B2.
  • "Splicing Concurrent Connections into a High Availability Session", US 10,848,367 B2.
  • "Acknowledgement and Packet Retransmission for Spliced Streams", US 10,841,040 B2.
  • "Service Automation for IoT Devices Using P4", US 10,834,240 B2.
  • "Accelerated Image Processing", US 9,392,293 B2.
  • "Localization Systems and Methods", US 9,154,919 B2.
  • "Scheduling MapReduce-like Systems for Fast Completion Time", US 9,104,477 B2.