Chunghan Lee

Chunghan Lee

  • Cloud
    Network Infrastructure

Chunghan Lee received the Ph.D. degree in the Dept. of Electronic and Information Engineering from Toyohashi University of Technology in 2013. He is currently a senior researcher at Toyota Motor Corporation. Before that, he spent a few years as a researcher at Fujitsu Laboratories. He developed on SDN controller based on GBP to control both virtual and legacy physical switches, and focused on cloud system analysis in the wild. He has been contributing to both academic and industrial sides, such as SNIA, OpenDaylight, and OPNFV communities. His research interests include NFV/SDN, cloud system monitoring, network measurement, and virtualization technology.

  • Department

    • Connected Company
      Connected Advanced Development Div.
  • Biography

    • 2019-

      Cloud infrastructure/networking for connected car

    • 2013-

      Researcher at Fujitsu Laboratories
      R&D activity : SDN/NFV/Cloud systems

    • 2013

      Ph.D. Dept. of Electronic and Information Engineering at Toyohashi University of Technology
      Thesis: Measurements, Analysis, and Modeling for Network Throughput Prediction on the Internet

  • Publication List/Conference presentation


    • Extending ECMP toward A Practical Hardware Load Balancer, Information Processing Society of Japan, IOTS2022

    Journal papers

    • A Portable Implementation of High Precision Time Synchronization Mechanism, IPSJ, IPSJ SIG OS Technical Report (#155), 2022

    • "Analytical Modeling of Network Throughput Prediction on the Internet", IEICE Trans. Information and Systems, Dec. 2012

    • "Traffic Anomaly Analysis and Characteristics on a Virtualized Network Testbed", IEICE Trans. Information and Systems, Dec. 2011

    International conference/workshop (Refereed)

    • Evaluating TCP Throughput Predictability from Packet Traces using Recurrent Neural Network, IEEE, The 2nd IEEE International Workshop on Distributed Intelligent Systems (DistInSys), 2022

    • Scalability Evaluation of a Per-User Access Control Framework, IEEE, Proc. the 8th Annual Conf. on Computational Science & Computational Intelligence (CSCI'21)

    • GRAF: A Graph Neural Network based Proactive Resource Allocation Framework for SLO-Oriented , Microservices, Association for Computing Machinery (ACM), The 17th International Conference on emerging Networking EXperiments and Technologies (CoNext’21)

    • "Performance Evaluation of GTP-U and SRv6 Stateless Translation", Proc. IEEE CNSM'19 2nd Workshop on Segment Routing and Service Function Chaining (SR+SFC 2019), Accepted.

    • "Detecting Wireless LAN Bottlenecks Using TCP Connection Measurement at Traffic Aggregation Point", Proc. The 20th Asia-Pacific Network Operations and Management Symposium (APNOMS), Sep.2019. - Best Paper Award -

    • "The Impact of Software-based Virtual Network in the Public Cloud", Proc. IEEE NetSoft'18 Software Defined Networking and Network Function Virtualization Performance (PVE-SDN 2018), Jun.2018.

    • "Understanding Storage Traffic Characteristics on Enterprise Virtual Desktop Infrastructure", Proc. the 10th ACM International Systems and Storage Conference (SYSTOR 2017), May.2017.

    • "Dynamic Virtual Network Configuration between Containers using Physical Switch Functions for NFV Infrastructure", Proc. IEEE conference on Network Functions Virtualization (NFV) and Software Defined Networks (SDN), Nov.2015.

    • "Flow-Aware Congestion Control to Improve Throughput under TCP Incast in Datacenter Networks", Proc. IEEE Compsac 3rd International Workshop on Architecture, Design, Deployment and Management of Networks and Applications (ADMNET 2015), Jul. 2015.

    • "DomainFlow: Practical Flow Management Method using Multiple Flow Tables in Commodity Switches", Proc. the 9th international conference on Emerging networking experiments and technologies (CoNEXT '13), Dec. 2013.

    • "Performance Implications of Task Scheduling by Predicting Network Throughput on the Internet", Proc. the 11th IEEE International Symposium on Parallel and Distributed Processing with Applications (ISPA 2013), Jul. 2013.

    • "Predicting Network Throughput for Grid Applications on Network Virtualization Areas", Proc. IEEE/ACM SC'11 The first International Workshop on Network-Aware Data Management (NDM 2011), Nov. 2011. - Best Paper Honorable Mention -

    Conference presentation

    • Design and implementation of multi-layer tracing for microservice environments, IPSJ, The 84th National Convention of IPSJ

    • Segment Routing over IPv6 (SRv6) with Open Source Software (OSS), HSN, High Speed Network Workshop (HSN) 2022

    • pHPA: A Proactive Autoscaling Framework for Microservice Chain, Association for Computing Machinery (ACM), 5th Asia-Pacific Workshop on Networking (APNet 2021)

    • The Latency Characteristics of GTP-U and SRv6 Stateless Translation on VPP Software Router, IEEE Computer Society (IEEE CS), IEEE ADMNET 2021

    • Latency Evaluation of GTP-U and SRv6 Stateless Translation Functions on Software Router (Kamuee), SDN/NFV forum, 2021.

    • "Understanding Cloud Traffic Characteristics in the Wild", KAIST EE Computing Lunch Seminar, Nov.2018.

    • "Measurement and Analysis of VDI System in the Wild", Future Internet Summit 2018, Nov.2018.

    • "Effects of Microbursts on Virtualized Networks", Technische Universität München (TUM) Informatik-Kolloquium, Jun.2016.

  • Commendation/Memberships


    • Segment Routing v6 (SRv6) Consortium, Contributor

    • OPNFV, Open vSwitch For NFV (OVSNFV), Contributor

    • Open NFP, Detecting Network-based Attacks (inbound/outbound) in the Cloud, Project leader

    Honors & Awards

    • Best Paper Awards, Proc. The 20th Asia-Pacific Network Operations and Management Symposium (APNOMS 2019)

    • Best Paper Honorable Mention, The first International Workshop on Network-Aware Data Management (NDM 2011)