Abstract:
Network virtualization creates multiple coexisting logical networks by reorganizing the resources of a common physical network. Implementation of network virtualization relies on creating slices for various resources of the underlying physical infrastructure, and a virtual network is a set of such slices. However, there have been no effective solutions to create slices for switches, the important interconnecting components of any networks. Existing approaches to share switch bandwidth among multiple users have several drawbacks, including impractical bandwidth allocation, weak traffic isolation, and poor performance guarantees. In this talk, we present a framework to create switch slices for scalable and efficient network virtualization. The basic idea is to emulate the ideal Generalized Processor Sharing (GPS) model by assigning exclusive transmission channels for each virtual network and scheduling packets by their departure time in GPS. The framework consists of two components. First, we design bandwidth allocation schemes to fairly allocate switch bandwidth among virtual networks based on their requests. Second, we propose packet scheduling schemes to assure the allocated bandwidth of each virtual network with strong traffic isolation, tight performance guarantees, and high bandwidth utilization. We evaluate our design by analysis and simulation, and the results demonstrate the effectiveness of the framework.

Biography:
Deng Pan received his Ph.D. degree in Computer Science from the State University of New York at Stony Brook in 2007. He is currently an Assistant Professor in the School of Computing and Information Sciences, Florida International University. His research interests include high speed networks and high performance computer architectures.