Asynchronous Quorum-based Channel Hopping Schemes for Cognitive Radio Networks

Chair Professor,
Department of Computer Science,
National Tsing Hua University

Abstract:

In cognitive radio networks, unlicensed users (secondary users, (SU)) need to rendezvous on licensed channels before establishing communication links. Dedicated common control channel is the simplest way to achieve rendezvous. However, due to the absolute priority of licensed users (primary users, (PU)) on accessing licensed channels, a dedicated common control channel may cause the PU long-time blocking problem, and the control channel saturation problem in a high SU density environment. Channel hopping schemes have been proposed to avoid the problems mentioned above. In this paper, we introduce two quorum-based channel hopping schemes. Our schemes outperform in terms of the four metrics: maximum time to rendezvous, channel loading, degree of rendezvous, and maximum conditional time to rendezvous.

Bio:

Jang-Ping Sheu received the B.S. degree in computer science from Tamkang University, Taiwan, Republic of China, in 1981, and the M.S. and Ph.D. degrees in computer science from National Tsing Hua University, Taiwan, Republic of China, in 1983 and 1987, respectively.

He is currently a Chair Professor of the Department of Computer Science and Associate Dean of the College of Electrical and Computer Science, National Tsing Hua University. He was a Chair of Department of Computer Science and Information Engineering, National Central University from 1997 to 1999. He was a Director of Computer Center, National Central University from 2003 to 2006. He was a Director of Computer and Communication Research Center from 2009 to 2015, National Tsing Hua University. His current research interests include wireless communications, mobile computing, and software-defined networks. He was an associate editor of the IEEE Transactions on Parallel and Distributed Systems and International Journal of Sensor Networks. He is an associate editor of the International Journal of Ad Hoc and Ubiquitous Computing.

He received the Distinguished Research Awards of the National Science Council of the Republic of China in 1993-1994, 1995-1996, and 1997-1998. He received the Distinguished Engineering Professor Award of the Chinese Institute of Engineers in 2003. He received the K. -T. Li Research Breakthrough Award of the Institute of Information and Computing Machinery in 2007. He received the Y. Z. Hsu Scientific Chair Professor Award and Pan Wen Yuan Outstanding Research Award in 2009 and 2014, respectively. Dr. Sheu is an IEEE Fellow and a member of Phi Tau Phi Society.