时间: 2006年1月6日上午10:00
地点: 曹光彪主楼201会议室
讲座人: Dr. Rong Zheng
讲座题目:Information Dissemination in Power-constrained Wireless Networks
欢迎广大同学和教师参加．本次讲座列入研究生读书报告范围．
Abstract:
Dissemination of common information through broadcasting is an integral part of wireless network operations such as query of interested events, resource discovery and code update. In this talk, we present research challenges in quantifying and designing efficient information dissemination protocols in power-constrained wireless networks. First, we characterize the behavior of information dissemination by defining two quantities, i.e., broadcast capacity and information diffusion rate and derive fundamental limits in both random extended and dense networks. Our theoretical study shows that using multihop relay, the rate of broadcasting continuous stream is in extended networks; while direct single-hop broadcast is efficient for dense networks. Furthermore, regardless of the density, information can diffuse at constant speed, bit meter/s in both extended and dense networks. The theoretical bounds obtained and proof techniques are instrumental to the modeling and design of efficient wireless network protocols. Second, we investigate reliability of propagation of information with feedback (PIF), which serves as a basic building block in distributed algorithms such as construction of spanning tree, leader election. We propose and evaluate remedies to improve the rate of success with moderate overhead.
Bio:
Rong Zheng received her Ph.D. degree from the CS department, University of Illinois, Urbana-Champaign. in 2004 and earned her M.E. and B.E. in Electrical Engineering in 1998 and 1996 from Tsinghua University, P.R. China. She is now an assistant professor at the CS department, University of Houston. Rong leads the Wireless System Research Group at University of Houston. Her current research interests include resource management of large-scale distributed systems, performance analysis and prototyping of wireless systems, wireless sensor networks.
地点: 曹光彪主楼201会议室
讲座人: Dr. Rong Zheng
讲座题目:Information Dissemination in Power-constrained Wireless Networks
欢迎广大同学和教师参加．本次讲座列入研究生读书报告范围．
Abstract:
Dissemination of common information through broadcasting is an integral part of wireless network operations such as query of interested events, resource discovery and code update. In this talk, we present research challenges in quantifying and designing efficient information dissemination protocols in power-constrained wireless networks. First, we characterize the behavior of information dissemination by defining two quantities, i.e., broadcast capacity and information diffusion rate and derive fundamental limits in both random extended and dense networks. Our theoretical study shows that using multihop relay, the rate of broadcasting continuous stream is in extended networks; while direct single-hop broadcast is efficient for dense networks. Furthermore, regardless of the density, information can diffuse at constant speed, bit meter/s in both extended and dense networks. The theoretical bounds obtained and proof techniques are instrumental to the modeling and design of efficient wireless network protocols. Second, we investigate reliability of propagation of information with feedback (PIF), which serves as a basic building block in distributed algorithms such as construction of spanning tree, leader election. We propose and evaluate remedies to improve the rate of success with moderate overhead.
Bio:
Rong Zheng received her Ph.D. degree from the CS department, University of Illinois, Urbana-Champaign. in 2004 and earned her M.E. and B.E. in Electrical Engineering in 1998 and 1996 from Tsinghua University, P.R. China. She is now an assistant professor at the CS department, University of Houston. Rong leads the Wireless System Research Group at University of Houston. Her current research interests include resource management of large-scale distributed systems, performance analysis and prototyping of wireless systems, wireless sensor networks.
