12月18日（周五）下午14:00，加拿大Alberta大学的Hai Jiang教授将在信电楼215进行学术报告，欢迎各位老师和同学们参加。

Title: Multi-Channel Slotted Cognitive Medium Access

Abstract:
Cognitive radio is a promising technology to solve the potential spectrum scarcity problem in the near future. In a cognitive radio network, unlicensed users (termed secondary users or cognitive users) can get access to licensed spectrum when licensed users (termed primary users) are not active. In this talk, channel sensing problems are considered in multi-channel slotted cognitive medium access control, in which channel time is partitioned into slots. Two scenarios are discussed: single-sensing and multi-sensing scenarios where each time slot starts with one and multiple sensing periods, respectively. Medium access protocols are designed using a reinforcement machine learning approach for the single-sensing scenario, while the optimal or near-optimal sensing order for the channels to be sensed in each time slot is derived for the multi-sensing scenario.

Speaker:
Dr. Hai Jiang, Assistant Professor
Department of Electrical and Computer Engineering
University of Alberta, Canada

Speaker’s bio:
HAI JIANG received the B.Sc. degree in 1995 and the M.Sc. degree in 1998, both in electronics engineering, from Peking University, China and the Ph.D. degree in 2006 in electrical engineering from the University of Waterloo, Canada. Since July 2007, he has been an Assistant Professor at the Department of Electrical and Computer Engineering, University of Alberta, Canada. His research interests include radio resource management, cognitive radio networking, and cross-layer design for wireless multimedia communications. He received a Best Paper Award from IEEE GLOBECOM 2008. He served as a Co-Chair for the Wireless and Mobile Networking Symposium at the IEEE International Conference on Communications (ICC) 2010. He is an Associate Editor for the IEEE Transactions on Vehicular Technology.