UCB Campus Box 430

Boulder, CO 80309-0430

Office: ECOT 335

Tel: 303-492-4384

Fax: 303-492-1112

Email: lijun.chen[at]colorado.edu

I am an Assistant Professor of Computer Science and Telecommunications at the University of Colorado at Boulder. I did my doctoral work at the California Institute of Technology, and was a Research Scientist at the same institute before joining the University of Colorado.

My research aims to build rigorous foundations and develop new methodologies in optimization, control, game theory, and systems theory for analysis, control, and design of complex networked systems, in particular communication/computer networks and power networks. Problems associated with such systems are typically large, computationally hard, and often require distributed solutions; yet they are also very structured and have features that can be exploited. My research focuses on developing optimization and game-theoretic approaches for such problems, and aims to develop foundational theories and tools for modeling, exploiting structure, and modularizing and distributing the design, optimization, and control of networked systems and protocols. A long-term research goal is to create a mathematical underpinning of network architecture that would include a common analytical framework that integrates sensing, computation, communication, control, and incentive, and allow rigorous analysis and systematic design of complex networked systems.

- Optimization and control of networked systems
- Cyber-physical networks such as the smart power grid
- Communication and computer networks
- Distributed optimization and control
- Convex relaxation and parsimonious solutions
- Game theory and its engineering applications
- Theoretical foundation of complex engineering networks

- Guohui Ding (PhD, CS)
- Zhiyuan Liu (PhD, CS)
- Zili Wang (MS, CS)
- Wangshan Yang (PhD, CS)
- Xinyang Zhou (PhD, Telecom)

- Analytical Foundations of Networks (Fall 2012, Fall 2013)
- Data Communications (Spring 2013)
- Convex Optimization and Its Applications (Fall 2014)
- Network Analysis Techniques (Fall 2014)
- Networks: Economics and Dynamics (Spring 2015)

*The Weighted Sum Rate Maximization in MIMO Interference Networks: Minimax Lagrangian Duality and Algorithm*, L. Chen and S. You, submitted for publication, 2013.*Pseudo-Gradient Based Local Voltage Control in Distribution Networks*, X. Zhou, M. Farivar and L. Chen, Allerton Conference on Communication, Control, and Computing, 2015.*A New Perspective to Synchronization in Networks of Coupled Oscillators: Reverse Engineering and Convex Relaxation*, X. Zhou and L. Chen, IFAC NecSys, 2015.*Local Voltage Control in Distribution Systems: An Incremental Control Algorithm*, M. Farivar, X. Zhou and L. Chen, IEEE SmartGridComm, 2015.*On the Interaction between Load Balancing and Speed Scaling*, L. Chen and N. Li, IEEE Journal on Selected Areas - Series on Green Communications and Networking, 2015.*Panorama: A Framework to Support Collaborative Context Monitoring on Co-Located Mobile Devices*, K. Alanezi, X. Zhou, L. Chen and S. Misha, MobiCASE, 2015.*Energy Efficient Opportunistic Network Coding for Unicast Flows in Wireless Networks*, T. Cui, L. Chen and T. Ho, submitted for pulication, 2012.*Connecting Automatic Generation Control and Economic Dispatch from an Optimization View*, N. Li, L. Chen and C. Zhao, IEEE Transactions on Control of Network Systems, 2015.*Demand Response Using Linear Supply Function Bidding*, N. Li, L. Chen and M. Dahleh, IEEE Transactions on Smart Grid, 2015.*A New Algorithm for the Weighted Sum Rate Maximization in MIMO Interference Networks*, X. Li, S. You, L. Chen, A. Liu and E. Liu, IEEE WCNC, 2015.*Demand Shaping in Cellular Networks*, X. Zhou and L. Chen, Allerton Conference on Communication, Control, and Computing, 2014.*Reverse and Forward Engineering of Frequency Control in Power Networks*, L. Chen and S. You, IEEE CDC, 2014.*Signal-anticipating in Local Voltage Control in Distribution Systems*, J. Shihadeh, S. You and L. Chen, IEEE SmartGridComm, 2014.*Convex-Concave Procedure for Weighted Sum Rate Maximization in a MIMO Interference Network*, S. You, L. Chen and E. Liu, IEEE Globecom, 2014.*Connecting Automatic Generation Control and Economic Dispatch from an Optimization View*, N. Li, L. Chen, C. Zhao and S. H. Low, ACC, 2014.*Hybrid Cellular-MANETs in Practice: A Microblogging System for Smart Devices in Disaster Areas*, C. Zheng, L. Chen, D. Sicker and X. Zeng, IEEE IWCMC, 2014.*Hybrid Cellular-MANETs: An Energy-Aware Routing Design*, C. Zheng, L. Chen and D. Sicker, IEEE/IFIP WONS, 2014.*Equilibrium and Dynamics of Local Voltage Control in Distribution Systems*, M. Farivar, L. Chen and S. Low, IEEE CDC, 2013.*Self-Organized Context-Aware Hybrid MANETs*, C. Zheng, D. Sicker and L. Chen, IEEE/IFIP WONS, 2013.*Congestion Control for Multicast Flows with Network Coding*, L. Chen, T. Ho, M. Chiang, S. H. Low and J. C. Doyle, IEEE Transactions on Information Theory, 2012.*Exact Convex Relaxation for Radial Networks using Branch Flow Models*, N. Li, L. Chen and S. H. Low, IEEE SmartGridComm, 2012.*Demand response in radial distribution networks*, N. Li, L. Gan, L. Chen and S. H. Low, Asilomar Conference, 2012.*An Optimization Based Demand response in radial distribution networks*, N. Li, L. Chen, L. Gan and S. H. Low, SGComm Workshop, 2012.*Distributed Distortion Optimization for Correlated Sources*, T. Cui, L. Chen and T. Ho, IEEE Transactions on Communications, 2012.*Optimal Demand Response: Problem Formulation and Deterministic Case*, L. Chen, N. Li, L. Jiang and S. H. Low, Control and Optimization Theory for Electric Smart Grids, Aranya Chakrabortty and Marija Ilic (Eds.), Springer, 2012.*Robustness, Optimization, and Architecture*, F. Chandra, D. F. Gayme, L. Chen and J. C. Doyle, European Journal of Control, 2011.*Optimal Demand Response Based on Utility Maximization in Power Networks*, N. Li, L. Chen and S. H. Low, IEEE PESGM, 2011.*On the Interaction between Load Balancing and Speed Scaling*, L. Chen, N. Li and S. H. Low, ITA Workshop, 2011.*Random Access Game and Medium Access Control Design*, L. Chen, S. H. Low and J. C. Doyle, IEEE/ACM Transactions on Networking, 2010.*Two Market Models for Demand Response in Power Networks*, L. Chen, N. Li, S. H. Low and J. C. Doyle, IEEE SmartGridComm, 2010.*Cross-Layer Design in Multihop Wireless Networks*(Invited), L. Chen, S. H. Low and J. C. Doyle, Special Issue on Wireless for the Future Internet, Computer Networks Journal, 2010.*On Distributed Scheduling in Wireless Networks Exploiting Broadcast and Network Coding*, T. Cui, L. Chen and T. Ho, IEEE Transactions on Communications, 2010.*Joint Congestion Control and Media Access Control Design for Wireless Ad Hoc Networks*, L. Chen, S. H. Low and J. C. Doyle, Proceedings of IEEE Infocom, March 2005.*Cross-layer Congestion Control, Routing and Scheduling design in Ad Hoc Wireless Networks*, L. Chen, S. H. Low, M. Chiang and J. C. Doyle, Proceedings of IEEE Infocom, April 2006.*Dual Scheduling Algorithm in a Generalized Switch: Asymptotic Optimality and Throughput Optimality*, L. Chen, S. H. Low and J. C. Doyle, in High-Performance Packet Switching Architectures, Itamar Elhanany and Mounir Hamdi (Eds.), Springer, August 2006.*On Asymptotic Optimality of Dual Scheduling Algorithm in A Generalized Switch*, L. Chen, S. H. Low and J. C. Doyle, Proceedings of WiOpt, April 2006.*Contention Control: A Game-theoretic Approach*, L. Chen, S. H. Low and J. C. Doyle, Proceedings of IEEE CDC, December 2007.*A Game-Theoretic Model for Medium Access Control*, L. Chen, T. Cui, S. H. Low and J. C. Doyle, Proceedings of International Wireless Internet Conference, October 2007.*Optimization Based Rate Control for Multicast with Network Coding*, L. Chen, T. Ho, S. H. Low, M. Chiang and J. C. Doyle, Proceedings of IEEE Infocom, May 2007.*Distributed Optimization in Wireless Networks Using Broadcast Advantage*, T. Cui, L. Chen and T. Ho, Proceedings of IEEE CDC, December 2007.*Optimization Based Rate Control for Multicast with Network Coding: A Multipath Formulation*, T. Cui, L. Chen and T. Ho, Proceedings of IEEE CDC, December 2007.*Opportunistic Source Coding for Data Gathering in WirelessSensor Networks*(Best Paper Award), T. Cui, L. Chen, T. Ho, S. Low and L. Andrew, Proceedings of IEEE Conference on Mobile Ad-hoc and Sensor Systems, October 2007.*On Distributed Distortion Optimization for Correlated Sources with Network Coding*, T. Cui, T. Ho and L. Chen, Proceedings of IEEE ISIT, June 2007.*Distributed Minimum Cost Multicasting with Lossless Source Coding and Network Coding*, T. Cui, T. Ho and L. Chen, Proceedings of IEEE CDC, December 2007.*Energy Efficient Opportunistic Network Coding for Wireless Networks*, T. Cui, L. Chen and T. Ho, Proceedings of IEEE Infocom, April 2008.*A Game-Theoretic Framework for Medium Access Control*, T. Cui, L. Chen and S. H. Low, IEEE Journal of Selected Areas on Communications, September 2008.*Bloch WaveOscillation and Coulomb Blockade in Mesoscopic Electric Circuits*, B. Chen, L. Chen and R. Han, Physics Letters A, 246:446-450, 1998.*Josephson Like Effects in the Mesoscopic Electric Circuit*, B. Chen, L. Chen and R. Han, Communications in Theoretical Physics, 31:301, 1999.