The Joint Computer & Communications Chapter of IEEE Kingston is pleased to co-sponsor the following School of Computing Distinguished Seminar:
Multicasting in Cognitive Radio Networks
Date: October 3rd, 2013.
Time: 2:30 – 3:30 pm
Location: Queens University, Dupuis Hall, 215
Speaker: Dr. Ahmed E. Kamal
Abstract: Cognitive radio networks (CRNs) have emerged as a promising, yet challenging, solution to enhance spectrum utilization, thanks to the technology of Software Defined Radios. A well-known property of CRNs is the potential heterogeneity in channel availability among secondary users. Multicasting, which is used by a growing number of applications, may suffer from significant throughput degradation when used in CRNs because of this property. This is because a source may need to transmit the multicast data over multiple channels to guarantee delivery to all neighboring receivers. This talk will address the importance of group communications in general, and multicasting in particular and their use in real life applications, and we focus on supporting this mode of communications using wireless networks.
We propose to support multicasting among crowds using CRNs, and introduce strategies to reduce the effect of the channel heterogeneity property on multicasting throughput in cognitive radio wireless mesh networks (CR-WMNs), hence enhancing the multicasting throughput. These strategies circumvent the curse of channel heterogeneity by taking advantage of this heterogeneity and implement cooperation among nodes while using different channels. We present a framework for implementing this cooperative strategy, within cells in CR-WMNs, and also between cells. Optimal and heuristic packet transmission scheduling approaches will be introduced for implementing the proposed assistance strategy. Performance results show that the proposed cooperative paradigm achieves a considerable reduction in the total multicast time, which in turn increases the system throughout.
Speaker Bio: Ahmed E. Kamal is a professor of Electrical and Computer Engineering at Iowa State University in the USA. He received a B.Sc. (distinction with honors) and an M.Sc. both from Cairo University, Egypt, and an M.A.Sc. and a Ph.D.
both from the University of Toronto, Canada, all in Electrical Engineering . He is a Fellow of the IEEE and a senior member of the Association of Computing Machinery. He is also an IEEE Communications Society Distinguished Lecturer for 2013 and 2014. Dr. Kamal’s research interests include cognitive radio networks, optical networks, wireless sensor networks, and performance evaluation. He received the 1993 IEE Hartree Premium for papers published in Computers and Control in IEE Proceedings, and the best paper award of the IEEE Globecom 2008 Symposium on Ad Hoc and Sensors Networks Symposium. Dr. Kamal has been the chair or co-chair of the Technical Program Committees of a number of IEEE sponsored conferences including the Optical Networks and Systems Symposia of the IEEE Globecom 2007, and the IEEE Globecom 2010, and is the co-chair of the IEEE Globecom Cognitive Radio and Networks Symposium in 2012. He is also the lead chair of the IEEE Globecom Cognitive Radio and Networks Symposium in 2014. He is on the editorial boards of the IEEE
Communications Surveys and Tutorials, the Comp uter Networks journal, and the Optical Switching and Networking journal.
Everyone is welcome. Light refreshments will be served.