Wireless Signal Processing & Networking Workshop:
Advanced Wireless Technologies

Date: 21 December (Friday),2012

Venue: Main Conference Room, CENTER HALL Building, Engineerings, Tohoku University

Time: 13:30~

Title: Two-Tier HetNets with Cognitive Femtocells in a Multichannel Environment: Modeling and Analysis Using Stochastic Geometry

Speaker: Prof. Ekram Hossain

Affiliation: University of Manitoba

   In a two-tier heterogeneous networking (HetNet) environment where femto access points (FAPs) with lower transmission power coexist with macro base stations (BSs) with higher transmission power, the FAPs may suffer significant performance degradation due to inter-tier interference. Introducing cognition into the FAPs through the spectrum sensing (or carrier sensing) capability helps them avoiding severe interference from the macro BSs and enhance their performance. In this paper, we use stochastic geometry to model and analyze performance of HetNets composed of macro BSs and cognitive FAPs in a multichannel environment. We quantify the performance gain in outage probability obtained by introducing cognition into the femto-tier, provide design guidelines, and show the existence of an optimal spectrum sensing threshold for the cognitive FAPs which depends on the HetNet parameters.

   Ekram Hossain is a Full Professor (since March 2010) in the Department of Electrical and Computer Engineering at University of Manitoba, Winnipeg, Canada. He received his Ph.D. in Electrical Engineering from University of Victoria, Canada, in 2001. Dr. Hossain's current research interests include design, analysis, and optimization of wireless/mobile communications networks, cognitive radio systems, and network economics.  He has authored/edited several books in these areas (http://www.ee.umanitoba.ca/~ekram). Dr. Hossain  serves as the Editor-in-Chief for the IEEE Communications Surveys and Tutorials (for the term 2012-2013) and an Editor for IEEE Wireless Communications.  Previously, he served as the Area Editor for the IEEE Transactions on Wireless Communications in the area of  ``Resource Management and Multiple Access'' from 2009-2011 and an Editor for the IEEE Transactions on Mobile Computing from 2007-2012. Dr. Hossain has won several research awards including the University of Manitoba Merit Award in 2010 (for Research and Scholarly Activities), the 2011 IEEE Communications Society Fred Ellersick Prize Paper Award, and the IEEE Wireless Communications and Networking Conference 2012 (WCNC'12) Best Paper Award. He is a Distinguished Lecturer of the IEEE Communications Society for the term 2012-2013. Dr. Hossain is a registered Professional Engineer in the province of Manitoba, Canada. 

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