报告题目: FAVOR: Frequency Allocation for Versatile Occupancy of spectRum in Wireless Sensor Networks

报告人: Prof. Jun Luo
School of Computer Engineering, Nanyang Technological University

报告时间：3月6日 星期四 上午10:00
报告地点：浙江大学工控老楼414会议室

报告摘要：While the increasing scales of the recent WSN deployments keep pushing a higher demand on the network throughput, the 16 orthogonal channels of the ZigBee radios are intensively explored to improve the parallelism of the transmissions. However, the interferences generated by other ISM band wireless devices (e.g., WiFi) have severely limited the usable channels for WSNs. Such a situation raises a need for a spectrum utilizing method more efficient than the conventional multi-channel access. To this end, we propose to shift the paradigm from discrete channel allocation to continuous frequency allocation in this paper. Motivated by our experiments showing the flexible and efficient use of spectrum through continuously tuning channel center frequencies with respect to link distances, we present FAVOR (Frequency Allocation for Versatile Occupancy of spectRum) to allocate proper center frequencies in a continuous spectrum (hence potentially overlapped channels, rather than discrete orthogonal channels) to nodes or links. To find an optimal frequency allocation, FAVOR creatively combines location and frequency into one space and thus transforms the frequency allocation problem into a spatial tessellation problem. This allows FAVOR to innovatively extend a spatial tessellation technique for the purpose of frequency allocation. We implement FAVOR in MicaZ platforms, and our extensive experiments with different network settings strongly demonstrate the superiority of FAVOR over existing approaches.

报告人简介：Jun Luo got his PhD degree in computer science from EPFL (Swiss Federal Institute of Technology in Lausanne), Lausanne, Switzerland, in 2006. From 2006 to 2008, he has worked as a post-doctoral research fellow in the Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Canada. In 2008, he joined the faculty of the School of Computer Engineering, Nanyang Technological University in Singapore, where he is currently an Assistant Professor. His research interests include wireless networking, mobile computing, applied operations research, as well as network security. He has been involved in the program committees of major events such as ACM SenSys, MobiHoc, and IEEE INFOCOM, SECON.