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Colloquium - Sicker

Advances in Cognitive Radio Networks
Department of Computer Science
11/29/2007
3:30pm-4:30pm

Recent advances in radio design and software methods have given birth to the field of Cognitive Radio (CR) networking. Such CRs offer a broad range of opportunities for improving the use and utilization of radio frequency spectrum. This includes the creation of radio networks that can reconfigure their operation based on application requirements, policy updates, environmental conditions and the ability to adapt to a wide range of protocols. One of the key benefits of having a CR is its ability to change communication parameters in response to changes in application needs as well as changes in the radio frequency landscape. Such reconfiguration requires an understanding of how these communication parameters interact within the network protocol stack. Analysis of these parametric cross-layer interactions is a critical precursor in the development of a predictive model and algorithm for dynamic reconfiguration of a CR.

This talk will investigate how parameters at the physical, data link, network, and application layers interact, how desirable configurations of these parameters can be determined, and how they effect the performance of applications. An analysis of varying communication parameters across networking layers is used to inform the design, implementation and evaluation of a predictive model and algorithm for dynamic reconfiguration of a cognitive radio. This model allows a CR to dynamically modify its configuration in order to improve system performance. A systematic method for development of a cognitive platform is presented. This method uses statistical analysis of variance (ANOVA) techniques to inform the design and implementation of a dynamic reconfiguration algorithm. This algorithm exploits cross-layer interactions to improve system performance, adapt to the needs of users and respond to changes in the radio frequency environment.

Douglas Sicker is an assistant professor in Computer Science at the University of Colorado Boulder. Prior to this he was Director of Global Architecture at Level 3 Communications, Inc. Prior to this, he was Chief of the Network Technology Division at the Federal Communications Commission (FCC). His research interests include cognitive radios, network security and public policy. He is currently an investigator on a number of NSF and DARPA funded projects. These projects explore adaptation and spectrum agility in wireless networks. Doug serves as the chair of the ASEE Engineering and Public Policy Division and co-chair of the IEEE P1900A working group, which addresses the dependability and evaluation of regulatory compliance for radio systems with dynamic spectrum access. After leaving the FCC, Doug served on the FCC Technical Advisory Council and as Chair of the FCC Network Reliability and Interoperability Council steering committee. He is a member of the ACM, the Internet Society and a senior member of the IEEE.

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