【2010-12-10】Using Multi-Resolution Spatial & Temporal Coding for In-Network Data Compression in Wireless Sensor Networks

Poster:Post date:2010-12-07

Title: Using Multi-Resolution Spatial & Temporal Coding for In-Network Data Compression in Wireless Sensor Networks
Dr.You-Chiun Wang (National Chiao-Tung University)
Time: 14:20, Dec 10 (Fri), 2010
Place: Room 105, CSIE Building


Many applications of wireless sensor network (WSN) aim at providing long-term monitoring of environments. In these applications, the energy consumption is a primary concern because sensor nodes have to regularly report data to the sink and need to continuously work for a very long time so that users may periodically request a rough overview of the monitored environment. On the other hand, users may occasionally query more in-depth data of certain areas to analyze abnormal events. These requirements motivate us to propose a new WSN architecture to support in-network data compression and data storage in WSNs from both space and time domains. The idea is to organize sensor nodes hierarchically and establish multi-resolution summaries of sensing data inside the network, through spatial and temporal compressions. In the space domain, only lower resolution summaries are sent to the sink; the other higher resolution summaries are stored in the network and can be obtained via queries. In the time domain, historical data stored in sensor nodes exhibits a finer resolution for more recent data, and a coarser resolution for older data. Our methods consider the hardware limitations of sensor nodes. So, the result is expected to save sensors’ energy significantly and thus can support long-term monitoring WSN applications. A prototyping system is also developed to verify its feasibility.

You-Chiun Wang received his BEng and MEng degrees in Computer Science and Information Engineering from the National Chung-Cheng University and the National Chiao-Tung University, Taiwan, in 2001 and 2003, respectively. He obtained his Ph.D. degree in Computer Science from the National Chiao-Tung University, Taiwan, in October of 2006. Currently, he is a postdoctoral research fellow in the Department of Computer Science, National Chiao-Tung University, Taiwan. His research interests include broadband wireless communications, wireless ad hoc & sensor networks, and embedded sensing systems & applications. He has published more than 30 papers in these research fields.

Dr. Wang served as a Local Arrangement Vice Chair in the IEEE Asia Pacific Wireless Communications Symposium (APWCS, 2007), as a Track Area Chair in the International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing (IMIS, 2011), as a Guest Editor of The Computer Journal (2009), as an Editor Board Member of the IARAI International Journal on Advances in Networks and Services (2009-present), and as TPC members of more than 20 conferences. He was a visiting scholar in the University of Delaware, USA (2009/Aug-2010/Feb). He is a member of the IEEE and the IEEE Communication Society.
Last modification time:2010-12-07 PM 1:29

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