My current research interests span cloud computing, distributed machine learning, big data analytics systems, and network function virtualization. My research features performance modeling and algorithm design of various network systems based on optimization theory, algorithmic game theory (e.g., auction mechanism design) and machine learning methods. I am also interested in design and implementation of networking systems.


| Current Research Projects | Past Research Projects |


Current Research Projects

Project-iconNFV, SDN

       We are working on service chain provisioning and pricing, as well as building NFV/SDN-based systems.

       Jingpu Duan, Chuan Wu, Franck Le, Alex X. Liu, Yanghua Peng. "Dynamic Scaling of Virtualized, Distributed Service Chains: A Case Study of IMS," to appear in IEEE JSAC Special issue on Emerging Technologies in Software-driven Communication.

       Xiaodong Yi, Jingpu Duan, Chuan Wu. ''GPUNFV: a GPU-Accelerated NFV System," in APNet 2017.

       Xiaoke Wang, Chuan Wu, Franck Le, Francis C.M. Lau. "Online Learning-Assisted VNF Service Chain Scaling with Network Uncertainties," in IEEE Cloud 2017.

       Linquan Zhang, Shangqi Lai, Chuan Wu, Zongpeng Li, Chuanxiong Guo. "Virtualized Network Coding Functions on the Internet," in IEEE ICDCS 2017.

       Xiaoxi Zhang, Chuan Wu, Zongpeng Li, Francis C.M. Lau. "Proactive VNF Provisioning with Multi-timescale Cloud Resources: Fusing Online Learning and Online Optimization," in IEEE INFOCOM 2017.

       Xiaoxi Zhang, Zhiyi Huang, Chuan Wu, Zongpeng Li, Francis C.M. Lau. "An Online Stochastic Buy-Sell Mechanism for VNF Chains in the NFV market," in IEEE JSAC Special Issue on Game Theory for Networks 2017.

       Xiaoke Wang, Chuan Wu, Franck Le, Alex Liu, Zongpeng Li, Francis C.M. Lau. "Online VNF Scaling in Datacenters," in IEEE Cloud 2016.

       Sijia Gu, Zongpeng Li, Chuan Wu, Chuanhe Huang. "An Efficient Auction Mechanism for Service Chains in the NFV Market," in IEEE INFOCOM 2016.

       Shunyi Xu, Chuan Wu, Zongpeng Li. "Software Defined Mobile Multicast," in IEEE MASS 2015.

      Jingpu Duan, Zhi Wang, Chuan Wu. "Responsive Multipath TCP in SDN-based Datacenters," in IEEE ICC 2015.

Project-iconPricing, Resource Scheduling, Data Migration in Cloud Data Centers or Geo-distributed Clouds

       We are studying a number of interesting issues related to cloud usage pricing, resource trading and scheduling. We design online algorithms to achieve long-term optimal operation of the systems.

      Weijie Shi, Chuan Wu, Zongpeng Li. "A Shapley-value Mechanism for Bandwidth On Demand between Datacenters," to appear in IEEE Transactions on Cloud Computing.

      Hongxing Li, Chuan Wu, Zongpeng Li, Francis C.M. Lau. "Virtual Machine Trading in a Federation of Clouds: Individual Profit and Social Welfare Maximization," in IEEE/ACM Transactions on Networking, 2016.

      Yu Wu, Zhizhong Zhang, Chuan Wu, Chuanxiong Guo, Zongpeng Li, Francis C.M. Lau. "Orchestrating Bulk Data Transfers across Geo-Distributed Datacenters", in IEEE Transactions on Cloud Computing, 2017.

      Weijie Shi, Chuan Wu, Zongpeng Li. "An Online Mechanism for Dynamic Virtual Cluster Provisioning in Geo-Distributed Clouds," in IEEE INFOCOM 2016.

      Shengkai Shi, Chuan Wu, Zongpeng Li. "Cost-Minimizing Online VM Purchasing for Application Service Providers with Arbitrary Demands," in IEEE Cloud 2015.

      Xiaoxi Zhang, Zhiyi Huang, Chuan Wu, Zongpeng Li, Francis C.M. Lau. "Online Auctions in IaaS Clouds: Welfare and Profit Maximization with Server Costs," in ACM SIGMETRICS 2015.

      Xiaoxi Zhang, Chuan Wu, Zongpeng Li, Francis C.M. Lau. "A Truthful (1 - epsilon)-Optimal Mechanism for On-demand Cloud Resource Provisioning," in IEEE INFOCOM 2015.

      Weijie Shi, Linquan Zhang, Chuan Wu, Zongpeng Li, Francis C.M. Lau. "An Online Auction Framework for Dynamic Resource Provisioning in Cloud Computing," in ACM SIGMETRICS 2014.

      Linquan Zhang, Zongpeng Li, Chuan Wu. "Dynamic Resource Provisioning in Cloud Computing: A Randomized Auction Approach," in IEEE INFOCOM 2014.

      Weijie Shi, Chuan Wu, Zongpeng Li. "RSMOA: A Revenue and Social Welfare Maximizing Online Auction for Dynamic Cloud Resource Provi- sioning," in ACM/IEEE IWQoS 2014.

       Xuanjia Qiu, Chuan Wu, Hongxing Li, Zongpeng Li, Francis C.M. Lau. "Federated Private Clouds via Broker's Marketplace: A Stackelberg- Game Perspective," in IEEE Cloud 2014.

      Jian Zhao, Hongxing Li, Chuan Wu, Zongpeng Li, Zhizhong Zhang, Francis C.M. Lau. "Dynamic Pricing and Profit Maximization for the Cloud with Geo-distributed Data Centers," in IEEE INFOCOM 2014.

      Linquan Zhang, Zongpeng Li, Chuan Wu, Minghua Chen. "Online Algorithms for Uploading Deferrable Big Data to The Cloud," in IEEE INFOCOM 2014.

      Linquan Zhang, Chuan Wu, Zongpeng Li, Chuanxiong Guo, Minghua Chen, Francis C.M. Lau. "Moving Big Data to The Cloud: An Online Cost-Minimizing Approach," in IEEE JSAC Special Issue on Networking Challenges in Cloud Computing Systems and Applications, 2013.

      Xuanjia Qiu, Wai Leong Yeow, Chuan Wu, Francis C.M. Lau. "Cost-Minimizing Preemptive Scheduling of MapReduce Workloads on Hybrid Clouds," in ACM/IEEE IWQoS 2013.


Project-iconData Center Demand Response

       We are investigating efficient incentive mechanisms for data center demand resource.

       Qihang Sun, Chuan Wu, Zongpeng Li, Shaolei Ren. "Colocation Demand Response: Joint Online Mechanisms for Individual Utility and Social Welfare Maximization," in IEEE JSAC - Series on Green Communications and Networking, 2016.

       Qihang Sun, Shaolei Ren, Chuan Wu, Zongpeng Li. "An Online Incentive Mechanism for Emergency Demand Response in Geo-Distributed Colocation Data Centers," in ACM e-Energy 2016 (Best Paper Award).

      Qihang Sun, Chuan Wu, Shaolei Ren, Zongpeng Li. "Fair Rewarding in Colocation Data Center: Truthful Mechanism for Emergency Demand Response," in ACM/IEEE IWQoS 2015.

      Linquan Zhang, Shaolei Ren, Chuan Wu, Zongpeng Li. "A Truthful Incentive Mechanism for Emergency Demand Response in Colocation Data Centers," in IEEE INFOCOM 2015.

      Linquan Zhang, Zongpeng Li, Chuan Wu. "Randomized Auction Design for Electricity Markets between Grids and Microgrids," in ACM SIGMETRICS 2014.

Project-iconOptimal Design of Internet/Mobile Applications on Cloud Computing Platforms

      We investigate the optimal design of content distribution and social networking applications on the newly emerged cloud computing platforms. Especially, we target at the most flexible IaaS (Infrastructure as a Service) cloud computing model and cloud systems spanning multiple geographical locations, possibly a hybrid of on-premise private clouds and public clouds. We design the best content replication and request distribution strategies, that guide the operation of the large-scale applications on the go, for ultimate operational cost minimization. We apply convex optimization and online optimization techniques (e.g., Lyapunov optimization), and implement prototype systems on Amazon EC2 and Google App Engine.

publication-icon Representative Publications:

      Yu Wu, Chuan Wu, Bo Li, Linquan Zhang, Zongpeng Li, Francis C.M. Lau. "Scaling Social Media Applications into Geo-Distributed Clouds," in IEEE/ACM Transactions on Networking, 2015.

      Xiaoxi Zhang, Chuan Wu, Zongpeng Li, Francis C.M. Lau. "Online Cost Minimization for Operating Geo-distributed Cloud CDNs," in ACM/IEEE IWQoS 2015.

      Zhi Wang, Lifeng Sun, Chuan Wu, Wenwu Zhu, Shiqiang Yang. "Joint Online Transcoding and Geo-distributed Delivery for Dynamic Adaptive Streaming," in IEEE INFOCOM 2014.

      Yu Wu, Chuan Wu, Bo Li, Francis C.M. Lau. "vSkyConf: Cloud-assisted Multi-party Mobile Video Conferencing," in the Second Mobile Cloud Computing (MCC) Workshop, in conjunction with ACM SIGCOMM 2013, Hong Kong, August 12, 2013.

       Yu Wu, Zhizhong Zhang, Chuan Wu, Zongpeng Li, Francis C.M. Lau. "CloudMoV: Cloud-based Mobile Social TV," in IEEE Transactions on Multimedia, special issue on Cloud-Based Mobile Media - Infrastructure, Services and Applications, 2013.

      Xuanjia Qiu, Hongxing Li, Chuan Wu, Zongpeng Li, Francis C.M. Lau. "Cost-Minimizing Dynamic Migration of Content Distribution Services into Hybrid Clouds," in IEEE INFOCOM 2012.

      Yu Wu, Chuan Wu, Bo Li, Xuanjia Qiu, Francis C.M. Lau. "CloudMedia: When Cloud on Demand Meets Video on Demand," in IEEE ICDCS 2011.


Project-iconMeasurement, Modeling and Design of Online and Mobile Social Networks

      We have done interesting measurements of online social networks (OSN) including Renren and YouKu, to reveal the influence propagation process in such OSNs. We also seek to model the forwarding phenomenon in social networks, using stochastic models. Design of novel mobile social networking systems and better content distribution systems facilitated by users' social relationships, is also part of the spectrum.

publication-icon Representative Publications:

      Yixin Bao, Xiaoke Wang, Zhi Wang, Chuan Wu, Francis C.M. Lau. "Online Influence Maximization in Non-Stationary Social Networks," in ACM/IEEE IWQoS 2016.

      Zhi Wang, Lifeng Sun, Chuan Wu, Shiqiang Yang. "Enhancing Internet-scale Video Service Deployment Using Microblog-based Prediction," in IEEE Transactions on Parallel and Distributed Systems, 2015.

      Shengkai Shi, Zhi Wang, Chuan Wu, Xiaojun Lin. "Characterizing Cascade Dynamics in a Microblogging System," in IEEE ICC 2014.

      Hongxian Sun, Chuan Wu. "Epidemic Forwarding in Mobile Social Networks," in IEEE ICC 2012.

      Zhi Wang, Lifeng Sun, Chuan Wu, Shiqiang Yang. "Guiding Internet-Scale Video Service Deployment Using Microblog-based Prediction," in IEEE INFOCOM 2012.


Past Research Projects

Project-iconOptimal Design of Cross-Layer Protocols for Cognitive Radio Networks with Socially Selfish Nodes

      Novelly considering social selfishness properties (i.e., willing to help friends but not strangers) of secondary users, we design dynamic, optimal protocols for joint spectrum allocation, routing and end-to-end rate control of unicast and multicast in cognitive radio networks. The dynamic algorithm is guaranteed to approximate long-term optimality, based on stochastic Lyapunov optimization theory.

publication-icon Representative Publications:

      Hongxing Li, Chuan Wu, Zongpeng Li. "Socially-Optimal Online Spectrum Auctions for Secondary Wireless Communication," in IEEE INFOCOM 2015.

      Hongxing Li, Chuan Wu, Zongpeng Li, Francis C.M. Lau. "Socially-optimal Multi-hop Secondary Communication under Arbitrary Primary User Mechanisms," in IEEE INFOCOM 2013.

      Hongxing Li, Chuan Wu, Zongpeng Li, Wei Huang, Francis C.M. Lau. "Stochastic Optimal Multirate Multicast in Socially Selfish Wireless Networks," in IEEE INFOCOM 2012.

      Hongxing Li, Wei Huang, Chuan Wu, Zongpeng Li, Francis C.M. Lau. "Utility-Maximizing Data Dissemination in Socially Selfish Cognitive Radio Networks," in IEEE MASS 2011.


Project-iconIncentive Engineering in Social and Peer-to-Peer Networks

      Incentive engineering is critical in modern networking systems with selfish participants, where participants' resource contribution decides data dissemination performance, e.g., peer-to-peer systems, online/mobile social networks. We design efficient incentive mechanisms for achieving high-performance content distribution, using auction theory and optimization, together with effective scheduling of the resources.

publication-icon Representative Publications:

      Zhi Wang, Chuan Wu, Lifeng Sun, Shiqiang Yang. "Peer-Assisted Social Media Streaming With Social Reciprocity," in IEEE Transactions on Network and Service Management, 2013.

      Jian Zhao, Chuan Wu. "Socially-optimal ISP-aware P2P Content Distribution via a Primal-Dual Approach," in HotPOST 2014.

      Xuanjia Qiu, Wei Huang, Chuan Wu, Zongpeng Li, Francis C.M. Lau. "Exploring the Sustainability of Credit-incentivized Peer-to-Peer Content Distribution," in HotPOST 2012 (Best Paper Award).

      Chuan Wu, Zongpeng Li, Xuanjia Qiu, Francis C.M. Lau. "Auction-based P2P VoD Streaming: Incentives and Optimal Scheduling," in ACM Transactions on Multimedia Computing, Communications and Applications, 2012.


Project-iconModeling and Optimization of Peer-to-Peer Systems

      To solicit useful insights for performance optimization in practical P2P (peer-to-peer) systems, we model different P2P systems from multiple angles, e.g., traffic locality vs. download performance, distributed control vs. optimal streaming capacity. Intriguing insights are derived from these analytically studies, which can guide practical P2P systems towards minimum control overhead and desirable traffic localization.

publication-icon Representative Publications:

      Jian Zhao, Chuan Wu, Xiaojun Lin. "Locality-aware Streaming in Hybrid P2P-Cloud CDN Systems", in Springer Peer-to-Peer Networking and Applications Journal, Special Issue on P2P Cloud Systems, 2015.

      Can Zhao, Jian Zhao, Xiaojun Lin, Chuan Wu. "Capacity of P2P On-Demand Streaming with Simple, Robust and Decentralized Control," in IEEE INFOCOM 2013.

      Jian Zhao, Chuan Wu. "Characterizing Locality-aware P2P Streaming," in Journal of Communications, 2012.

      Chuan Wu, Baochun Li, Shuqiao Zhao. "On Dynamic Server Provisioning in Multichannel P2P Live Streaming," in IEEE/ACM Transactions on Networking, 2011.

      Can Zhao, Xiaojun Lin, Chuan Wu. "The Streaming Capacity of Sparsely-Connected P2P Systems with Distributed Control," in IEEE INFOCOM 2011.

      Wei Huang, Chuan Wu, Zongpeng Li, Francis C.M. Lau. "The Performance and Locality Tradeoff in BitTorrent-like File Sharing Systems," in Springer Peer-to-Peer Networking and Applications Journal, 2014.

      Chuan Wu, Baochun Li, Zongpeng Li. "Dynamic Bandwidth Auctions in Multioverlay P2P Streaming with Network Coding," in IEEE Transactions on Parallel and Distributed Systems, 2008.


Project-iconMeasurement of Large-Scale Peer-to-Peer Streaming Systems

      We conducted extensive measurements of a large-scale P2P streaming system, UUSee, and evaluated its performance from various aspects. Useful observations have been applied to improve the performance of this real-world system.

publication-icon Representative Publications:

      Chuan Wu, Baochun Li, Shuqiao Zhao. "Diagnosing Network-wide P2P Live Streaming Inefficiencies," in ACM Transactions on Multimedia Computing, Communications and Applications, 2012.

      Zimu Liu, Chuan Wu, Baochun Li, Shuqiao Zhao. "UUSee: Large-Scale Operational On-Demand Streaming with Random Network Coding," in IEEE INFOCOM 2010.

      Zimu Liu, Chuan Wu, Baochun Li, Shuqiao Zhao. "Distilling Superior Peers in Large-Scale P2P Streaming Systems," in IEEE INFOCOM 2009.

      Chuan Wu, Baochun Li, Shuqiao Zhao. "Exploring Large-Scale Peer-to-Peer Live Streaming Topologies," in ACM Transactions on Multimedia Computing, Communications and Applications, 2008.

      Chuan Wu, Baochun Li, Shuqiao Zhao. "Characterizing Peer-to-Peer Streaming Flows," in IEEE Journal on Selected Areas in Communications, Special Issue on Advances in Peer-to-Peer Streaming Systems, 2007.

© 2007-2017 Chuan Wu. Last updated August 2017.