Cognitive Networks/Dynamic Spectrum Access in Wireless  Networks: Overview

Abstract

Due tospectrum scarce, dynamic spectrum access (DSA) and cognitive radios/networkshave been attracted a lot of research in the past decades. This talk presents ahigh level overview on the recent developments of the dynamical spectrum accesstechniques, covering a broad range of areas: motivations, standard activities,three models for dynamic spectrum access, characteristics of the availablebandwidth of the primary users, sensing technologies and sensing intervals todetect white spaces/available spectrum, spectrum allocation and management algorithms(such as liner programming, graph coloring, game theory, machine learning),tradeoff between spectrum/performance gain versus additional overhead used inimplementing DSA. A brief overview of the security issues associated with DSAnetworks and recent DARPA program related to dynamic spectrum access was alsopresented.

Short bio

Dr. Zhensheng  Zhang has over twenty years’ experience indesign and analysis of network architecture, protocols and control algorithms,with very strong backgrounds in performance analysis, modeling and simulationof the communication networks. He is currently visiting UCLA. He has worked at CubicCorporation, Senior Principal Scientist, Networking Research and worked at Boeingas Principal Scientist, served as Principal Investigator for several Departmentof Defense projects. He also worked at Bell Laboratories, Lucent Technologies,and Columbia University, respectively, focusing on research and development inwireless networks. His research interests include wireless ad hoc networks,wireless sensor networks. He has published over 110 technical papers in IEEEJournals and key IEEE conferences (one of his papers was listed as the top 10most reading articles from IEEE Communications Society website in 2007).  He was IEEE Comsoc distinguished lecturer(2010-2013) and has given many invited talks and tutorials on wireless ad hocnetworks at various conferences and universities. He received the IEEERegional/Area Outstanding Engineer award in 2011. He received his Ph. D. inElectrical Engineering from the University of California, Los Angeles (UCLA).

Dr. Zhangsevered as Editor of IEEE Transactions on Wireless Communications from 2002 to2006. He served as the General Chair of Broadband Wireless NetworkingSymposium, October 2004. He was a Guest Editor for the IEEE JSAC special issueon Overlay Networks, 2003 and the Journal of Wireless Networks issue onmultimedia wireless networks, August 1996. He is the Chapter Chair of IEEECommunication Society, San Diego, 2004-2013. Dr. Zhang was the IEEE Globecom 2012 TPC Chair, and is currently servingas the IEEE ICC 2015 TPC Vice Chair and IEEE Globecom 2015 Vice ExecutiveChair.