Keynote Speech 1: Yunhao Liu
Session Chair: Mo Li
Title: GreenOrbs: Lessons Learned from Extremely Large Scale Sensor Network Deployment
Abstract:
"The world has just ten years to bring greenhouse gas emissions under control before the damage they cause becomes irreversible." This is a famous prediction raised by climate scientists and environmentalists recently. It reflects the increasing attention in the past decade from human beings on global climate change and environmental pollution. On the other hand, forest, which is regarded as the earth’s lung, is a critical component in global carbon cycle. It is able to absorb 10%~30% of CO2 from industrial emissions. Moreover, it has large capacity of water conservation, preventing water and soil loss, and hence reducing the chance of nature disasters like mud-rock flows and floods. Forestry applications usually require long-term, large-scale, continuous, and synchronized surveillance of huge measurement areas with diverse creatures and complex terrains. The state-of-arts forestry techniques, however, support only small-scale, discontinuous, asynchronous, and coarse-grained measurements, which at the same time incur large amount of cost with respect to human resource and equipments. WSNs have great potential in resolving the challenges in forestry. Under such circumstances, GreenOrbs is launched. The information GreenOrbs offers can be used as evidences, references, and scientific tools for human beings in the battle against global climate changes and environmental pollution.
The prototype system is deployed in the campus woodland of Zhejiang Forestry University. The deployment area is around 40,000 square meters. The deployment started in May 2009 and included 50 nodes. In November 2009 it was expanded to include 330 nodes. The system scale reaches 400 in April 2010. The duty cycle of nodes is set at 8%. The network diameter is 12 hops. The sensor data are published online via the official GreenOrbs website.The Tianmu Mountain deployment includes 200 nodes and has been in continuous operation since August 2009. The deployment area is around 200,000 square meters. The duty cycle of nodes is set at 5%. The network diameter is 20 hops.
We learned a lot of lessons during the deployment of GreenOrbs. This experiment results in several publications, including ACM Sensys 2009, 2010, ACM Sigmetrics 2010, ICNP 2010, INFOCOM 2010, etc. In this discussion, we will focus on several open issues for extremely large scale deployment of sensor networks including routing, diagnosis, localization, link quality, and etc.
Bio-Sketch:
Yunhao Liu received his BS degree in Automation Department from Tsinghua University, China, in 1995, and an MA degree in Beijing Foreign Studies University, China, in 1997, and an MS and a Ph.D. degree in Computer Science and Engineering at Michigan State University in 2003 and 2004, respectively. He holds the EMC Chair Professorship at Tsinghua University. He is a member of Tsinghua National Lab for Information Science and Technology, and the Director of Tsinghua National MOE Key Lab for Information Security. He is also a faculty at the Department of Computer Science and Engineering, the Hong Kong University of Science and Technology. He is currently serving as the Associate Editor of IEEE Transactions on Mobile Computing and IEEE Transactions on Parallel and Distributed Systems. He also served many leading conference as TPC member, such as ACM Mobicom, ACM Mobihoc, IEEE INFOCOM, etc. He is now the Vice Chair of ACM China Council in charge of operation.
Keynote Speech 2: Ning Cai
Session Chair: Yuan Luo
Title: Information Theoretical Security and Secure Network Coding
Abstract:
Computational security and information theoretical security are two main approaches to security. Although information theoretic secure approach provides an “absolutely” security, it needs more resource. For this reason currently the most secure standards, especially commercial standard, are computational. However people pay more and more attention to information theoretical security as they more and more concern their private at the digital age.
In this talk we first describe several important information theoretical models, Shannon ciphersystem, secret sharing, wiretap channel, the second type of wiretap channel, secure network coding, key agreement (or distribution), and private computation and then discuss their relation. Finally we illustrate the basic idea in linear information theoretical security system by secure network coding.
Bio-Sketch:
Ning Cai received the B.S.degree in mathematics from the Normal College of Beijing,Beijing,China in 1982, the M.S. degree in mathematics from Academia Sinica,Beijing,China,in 1984, and the Dr. degree in mathematics from the University of Bielefeld,Bielefeld,Germany,in1988.
During 1984-1986, he worked in the Institute of Systems Sciences, Academia Sinica,Beijing,China. During 1988-1989, he was with the Department of Mathematics,Statistics and Computer Science,the University of Illinois,Chicago,USA. From 1989 to 1998, he was a Miss.Mitarbeiter in the Department of Mathematics, the University of Bielefeld,Germany and from 1998 to 1999, he was with the School of Computing, the National University of Singapore,Singapore. From 2000 to 2001, he was with the Departmen to Information Engineering,the Chinese University of HongKong, HongKong. From 2002 to 2004 he was with the Departmen to Mathematics,the University of Bielefeld,Germany. In 2005 he visited Department of Information Engineering,theChinese University of HongKong, HongKong. Since 2006,he is a distinguished professor in the StateKeyLab.of Integrated Services Networks(ISN), the Xidian University, China.
Prof.Cai is a recipient of the 2005 IEEE Information Theory Society Paper Award.
Prof.Cai served as an IT Society Awards Committee member in 2008,2 009, a guest editor of joint Special Issue of IEEET rans. On Information Theory and IEEE/ACM on Networking on Networking InformationTheory, 2006, and co-chairs and TPC members in several international conferences.
His research interests in clude network coding, Shannon theory, quantum information theory, and combinatorics and its applications in computer science. Currently he is mainly working on networkcoding.
Keynote Speech 3: Rynson Lau
Session Chair: Mo Li
Title: Motion Prediction for Online Gaming
Abstract:
In a multiplayer online game, multiple remote players may participate and interact with each other within a shared game scene through the Internet. Unfortunately, online games generally suffer from the network latency problem, in particular when the players need to interact with each other. We have been developing a geometry streaming environment to support online gaming. As a player moves around in the game scene, geometry information relevant to the player is dynamically sent to the client machine. Such a streaming environment has many advantages, but it also exacerbates the network latency problem in online gaming. In this talk, we look at how motion prediction may be used to support multiplayer online gaming and discuss some problems and issues needed to be addressed. We first present existing work on motion prediction. We then discuss our previous work on short-term prediction and our current work on long-term prediction to support online gaming. Finally, we also discuss our work in combining short-term prediction with long-term prediction for geometry prefetching.
Bio-Sketch:
Rynson Lau received a first-class B.Sc. honors degree from the University of Kent and a Ph.D. degree from the University of Cambridge. He has been on the faculty of Durham University, City University of Hong Kong, and The Hong Kong Polytechnic University.
Rynson Lau serves on the Editorial Board of Computer Animation and Virtual Worlds, International Journal of Virtual Reality, IEEE Trans. on Learning Technologies, and as the Area Editor of International Journal of Distance Education Technologies. He has served as the Guest Editor of a number of journal special issues, including IEEE Internet Computing, ACM Trans. on Internet Technology, IEEE Trans. on Knowledge and Data Engineering, IEEE Trans. on Multimedia, IEEE Trans. on Visualization and Computer Graphics, and IEEE Computer Graphics & Applications. In addition, he has also served on the committees of a number of conferences, including Program Co-chair of ACM VRST 2004 (Hong Kong), ICWL 2005 (Hong Kong), ICAT 2006 (Hangzhou, China), ICEC 2007 (Shanghai, China), ACM MTDL 2009 (Beijing, China), IEEE U-Media 2010 (Jinhua, China), and Conference Co-chair of CASA 2005 (Hong Kong), ACM VRST 2005 (Monterey, California), ICWL 2007 (Edinburgh, U.K.), IDET 2008 (Lanzhou, China), ACM MDI 2009 (Beijing, China), ACM MTDL 2010 (Firenze - Italy), ACM VRST 2010 (Hong Kong), ICWL 2011 (Hong Kong).