Multi-Channel Scheduling and Resource Allocation in Cognitive Radio and Vehicular Networks

ECE Seminar: Multi-Channel Scheduling and Resource Allocation in Cognitive Radio and Vehicular Networks

Starts at: February 12, 2015 4:30 PM

Ends at: 6:00 PM

Location: Scaife 125

Speaker: Dr. Eylem Ekici

Affiliation: Ohio State University

Refreshments provided: Yes

Link to Poster

Link to Video (1)


Research efforts over the last decades that target cognitive radio networks has primarily been motivated by the scarcity of available bandwidth and low utilization of licensed bands. Among a myriad of essential issues for CRNs, multi-channel resource allocation has only recently drawn the attention of the research community. Multi-channel allocation is essential to providing flexibility to many bandwidth-hungry applications that drive the bandwidth demand. While multi-channel resource allocation has been investigated in the past, the presence of primary users renders the problem significantly more challenging.
In this talk, two aspects of this problem is discussed. First, we seek to characterize the behavior of scheduling algorithms under CRN scenarios as the available bandwidth is split into arbitrarily small subbands. We present a scheduling algorithm that can achieve a well-defined fraction of the capacity region, and characterize the system behavior deterministically. In the second part of the talk, we concentrate on the resource allocation for applications that cannot tolerate queuing in the context of vehicular networks. We present two algorithms that trade off complexity for approximation factor efficacy. The algorithms and approaches presented are regarded as the initial steps towards more realistic and implementable solutions for CRNs.

Dr. Eylem Ekici has received his BS and MS degrees in Computer Engineering from Bogazici University, Istanbul, Turkey, in 1997 and 1998, respectively. He received his Ph.D. degree in Electrical and Computer Engineering from Georgia Institute of Technology, Atlanta, GA, in 2002. Currently, he is a professor in the Department of Electrical and Computer Engineering of The Ohio State University, Columbus, OH. Dr. Ekici's current research interests include cognitive radio networks, vehicular communication systems, and next generation wireless systems, with a focus on algorithm design, medium access control protocols, resource management, and analysis of network architectures and protocols. He is a Senior Member of IEEE and a member of ACM.