Closing the loop in cognitive radio networks: Towards higher layer protocol design, user applications, and systems
Intervenant(s) : Kaushik Chowdhury (Northeastern University)Cognitive radio (CR) technology allows devices to share the wireless spectrum with other users that have a license for operation in these spectrum bands. This area of research promises to solve the problem of spectrum scarcity in the unlicensed bands. While there have been rapid strides made in spectrum management techniques at the lower layers of the protocol stack, work on the higher layers, such as the transport and application layers, still remains at a nascent stage. We start by highlighting the open challenges in the design of end-to-end protocols that assure QoS and reliability. There is a special emphasis on CR applications, especially in the domains of vehicular and medical telemetry. We then discuss the transport layer design issues in extending TCP and how some existing TCP flavors need to be adapted for highly fluctuating spectrum conditions. Finally, experiences in prototyping CR systems are discussed, as well the vision of future hardware extensions to the basic radio front-end to facilitate full duplex communication and quick spectrum sensing using plug and play external FPGAs. Finally, an overview of other ongoing wireless research projects in the domains of RF energy harvesting and intra-body communication is provided.
Bio: Kaushik Chowdhury (email@example.com) is Associate Professor in the Electrical and Computer Engineering Department at Northeastern University, Boston, MA, USA. He was earlier Assistant Professor in the same department from 2009-15. He received his M.S. in Computer Science from the University of Cincinnati, OH, in 2006, and Ph.D. from the Georgia Institute of Technology, Atlanta, GA in 2009. His M.S. thesis was given the outstanding thesis award jointly by the ECE and CS departments at the University of Cincinnati. He received the Best Paper Award at the IEEE ICC Conference in 2009, 2012, 2013, as well as the Best Paper award in the ICNC Conference in 2013. He serves as area editor for the Elsevier Ad Hoc and Computer Communications journals. He is Sr. Member of the IEEE and is the present Chair for the IEEE Technical Committee on Simulation.
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