About Me

I am working in Yahoo! Inc. now. Old home page: http://www.cse.ohio-state.edu/~lguo/

Education

• Ph.D. in Computer Science and Engineering, The Ohio State University. 

• Ph.D. study in Computer Science, College of William and Mary. 

• Master in Computer Science, University of Science and Technology of China.
  

• Bachelor in Space Physics, University of Science and Technology of China.
  

Research

• Measurements and analysis of Internet media traffic

• Wireless Internet systems and networking

• Distributed streaming media systems
  

• Peer-to-peer search and overlay networks

• Web 2.0 and social networks
  

Publications

Ph.D. Dissertation

• Insights into Access Patterns of Internet Media Systems: Measurements, Analysis, and System Design (advisor: Prof. Xiaodong Zhang)
  

Book Chapters

• Lei Guo and Xiaodong Zhang, ``Peer-to-Peer Communication'', invited book chapter in Encyclopedia of Computer Science, 5th Edition, John Wiley & Sons, Inc., to appear. 
  

• Lei Guo, Songqing Chen, and Xiaodong Zhang, ``Peer-to-Peer Assisted Streaming Proxy'', invited book chapter in Web Content Delivery, Springer-Verlag New York, Inc., 2005, pp. 265-281.
  

Refereed Journal Publications

• new! Song Jiang, Lei Guo, Xiaodong Zhang, and Haodong Wang, ``LightFlood: Minimizing Redundant Messages and Maximizing Scope of Peer-to-Peer Search'', IEEE Transactions on Parallel and Distributed Systems (TPDS), Vol. 19, No. 5, 2008, pp. 601-614.

• Lei Guo, Xiaoning Ding, Haining Wang, Qun Li, Songqing Chen, and Xiaodong Zhang, ``Cooperative Relay Service in a Wireless LAN'', IEEE Journal on Selected Areas in Communications (JSAC), Vol. 25, No. 2, 2007, pp. 355-368.

• Lei Guo, Songqing Chen, Zhen Xiao, Enhua Tan, Xiaoning Ding, and Xiaodong Zhang, ``A Performance Study of BitTorrent-like Peer-to-Peer Systems'', IEEE Journal on Selected Areas in Communications (JSAC), Vol. 25, No. 1, 2007, pp. 155-169.

• Lei Guo, Songqing Chen, and Xiaodong Zhang, ``Design and Evaluation of a Scalable and Reliable P2P Assisted Proxy for On-demand Streaming Media Delivery'', IEEE Transactions on Knowledge and Data Engineering (TKDE), Vol. 18, No. 5, 2006, pp. 669-682.

• Lei Guo, Song Jiang, Li Xiao, and Xiaodong Zhang, ``Fast and Low Cost Search Schemes by Exploiting Localities in P2P Networks'', Journal of Parallel and Distributed Computing (JPDC), Vol. 65, Issue 6, 2005, pp. 729-742.

Refereed Conference Publications

• new! Lei Guo, Enhua Tan, Songqing Chen, Zhen Xiao, and Xiaodong Zhang, ``The Stretched Exponential Distribution of Internet Media Access Patterns'', Proceedings of the 27th Annual ACM Symposium on Principles of Distributed Computing (PODC 2008), Toronto, Canada, August 18-21, 2008, pp. 283-294. [slides]
  

• new! Xin Li, Lei Guo, and Yihong (Eric) Zhao, ``Tag-based Social Interest Discovery'', Proceedings of the 17th International World Wide Web Conference (WWW 2008), Beijing, China, April 21-25, 2008. [slides]
  

• Enhua Tan, Lei Guo, Songqing Chen, and Xiaodong Zhang, ``PSM-throttling: Minimizing Energy Consumption for Bulk Data Communications in WLANs'', Proceedings of the 15th IEEE International Conference on Network Protocols (IEEE ICNP 2007), Beijing, China, October 16-19, 2007, pp. 123-132. [slides]
  

• Enhua Tan, Lei Guo, Songqing Chen, and Xiaodong Zhang, ``SCAP: Smart Caching in Wireless Access Points to Improve P2P Streaming'', Proceedings of the 27th International Conference on Distributed Computing Systems (IEEE ICDCS 2007), Toronto, Canada, June 25-29, 2007. [slides]
  

• Zhen Xiao, Lei Guo, and John Tracey, ``Understanding Instant Messaging Traffic Characteristics'', Proceedings of the 27th International Conference on Distributed Computing Systems (IEEE ICDCS 2007), Toronto, Canada, June 25-29, 2007. [slides]

• Lei Guo, Enhua Tan, Songqing Chen, Zhen Xiao, and Xiaodong Zhang, ``Does Internet media traffic really follow Zipf-like distribution?'', Proceedings of the International Conference on Measurement and Modeling of Computer Systems (ACM SIGMETRICS 2007, extended abstract), San Diego, California, USA, June 12-16, 2007, pp. 359-360. [poster]
  

• Lei Guo, Enhua Tan, Songqing Chen, Zhen Xiao, Oliver Spatscheck, and Xiaodong Zhang, ``Delving into Internet Streaming Media Delivery: A Quality and Resource Utilization Perspective'', Proceedings of Internet Measurement Conference (IMC 2006, long paper), Rio de Janeiro, Brazil, October 25-27, 2006, pp. 217-230. [slides]

• Shansi Ren, Lei Guo, and Xiaodong Zhang, ``ASAP: an AS-Aware Peer-Relay Protocol for High Quality VoIP with Low Overhead'', Proceedings of 26th International Conference on Distributed Computing Systems (IEEE ICDCS 2006), Lisboa, Portugal, July 4-7, 2006. [slides]

• Lei Guo, Xiaoning Ding, Haining Wang, Qun Li, Songqing Chen, and Xiaodong Zhang, ``Exploiting Idle Communication Power to Improve Wireless Network Performance and Energy Efficiency'', Proceedings of the 25th IEEE Annual Conference on Computer Communications (IEEE INFOCOM 2006), Barcelona, Spain, April 23-29, 2006. [slides]
  

• Lei Guo, Songqing Chen, Zhen Xiao, Enhua Tan, Xiaoning Ding, and Xiaodong Zhang, ``Measurements, Analysis, and Modeling of BitTorrent-like Systems'', Proceedings of Internet Measurement Conference (IMC 2005, long paper), Berkeley, California, USA, October 19-21, 2005, pp. 35-48. [slides]

• Lei Guo, Songqing Chen, Zhen Xiao, and Xiaodong Zhang, ``Analysis of Multimedia Workloads with Implications for Internet Streaming'', Proceedings of the 14th International World Wide Web Conference (WWW 2005), Chiba, Japan, May 10-14, 2005, pp. 519-528. [slides]

• Lei Guo, Songqing Chen, Zhen Xiao, and Xiaodong Zhang, ``DISC: Dynamic Interleaved Segment Caching for Interactive Streaming'', Proceedings of the 25th International Conference on Distributed Computing Systems (IEEE ICDCS 2005), Columbus, Ohio, USA, June 6-10, 2005, pp. 763-772.

• Lei Guo, Song Jiang, Li Xiao, and Xiaodong Zhang, ``Exploiting Content Localities for Efficient Search in P2P Systems'', Proceedings of 18th International Symposium on Distributed Computing (DISC 2004), Amsterdam, Netherlands, October 4-8, 2004, pp. 349-364. [slides]

• Shansi Ren, Lei Guo, Song Jiang, and Xiaodong Zhang, ``SAT-Match: A Self-Adaptive Topology Matching Method to Achieve Low Lookup Lateslides]

• Lei Guo, Songqing Chen, Shansi Ren, Xin Chen, and Song Jiang, ``PROP: a Scalable and Reliable P2P Assisted Proxy Streaming System'', Proceedings of the 24th International Conference on Distributed Computing Systems (IEEE ICDCS 2004), Tokyo, Japan, March 23-26, 2004, pp. 778-786. [slides]

• Song Jiang, Lei Guo, and Xiaodong Zhang, ``LightFlood: an Efficient Flooding Scheme for File Search in Unstructured Peer-to-Peer System'', Proceedings of 32th International Conference on Parallel Processing (ICPP 2003), Kaohsiung, Taiwan, China, October 6-9, 2003, pp. 627-635. [slides]

Patents

• ``Systems and Methods for Determining a Tag Match Ratio'', U.S. patent filed on August 2008 (with Xin Li and Eric Zhao).

• ``Method and Apparatus for Processing Messages in Messaging System'', U.S. patent filed on August 2007 (with Erich M. Nahum, John Tracey, Dinesh Verma, Xiping Wang, Charles P. Wright, and Zhen Xiao).
  

• ``Method and System for Hierarchical Streaming Proxies'', U.S. patent filed on September 2005 (with Songqing Chen, Zhen Xiao, and Xiaodong Zhang).
  

• ``Method and System for Scalable Content Storage and Delivery'', U.S. patent filed on September 2005 (with Songqing Chen, Xiaoning Ding, Enhua Tan, Zhen Xiao, and Xiaodong Zhang).
  

• ``Caching Method and System for Providing Interactive Streaming'', U.S. patent filed on January 2005 (with Songqing Chen, Zhen Xiao, and Xiaodong Zhang).
  

• ``Method and System for Supplying Media over Communication Networks'', U.S. patent filed on January 2005 (with Songqing Chen, Zhen Xiao, and Xiaodong Zhang).
  

Professional Experiences

• Senior technical staff, Yahoo! Inc., 2007-present.
  

• Research intern, Network Server System Software, IBM T. J. Watson Research Center, 2006.
  

• Resident visitor, Dependable Distributed Computing, AT&T Labs - Research, 2004-2006.
  

• Tutor, University of Science and Technology of China, 1996-2001.
  

Professional Services

• Member of technical program committee, ICDCS 2009.
  

• Member of technical program committee, WWW 2008.

Award

2005 Park Graduate Research Award, College of William and Mary. [slides]