Associate Professor, National University of Singapore
Nov. 4th, 11am in DBH 6011
DASH Streaming with Software Defined Networking Support
HTTP adaptive streaming (HAS) is being adopted with increasing frequency and becoming the de-facto standard for on-demand video streaming. However, the client-driven, on-off adaptation behavior of HAS results in uneven bandwidth competition and it is exacerbated when a large number of clients share the same bottleneck network link and compete for the available bandwidth. With HAS each client independently strives to maximize its individual share of the available bandwidth, which leads to bandwidth competition and a decrease in end-user quality of experience (QoE). The competition causes scalability issues, which are quality instability, unfair bandwidth sharing and network resource underutilization. In this talk I will present our proposal of a new software defined networking (SDN) based dynamic resource allocation and management architecture for HAS systems, which aims to alleviate these scalability issues and improve the per-client QoE.
Roger Zimmermann is an associate professor with the Computer Science Department at the National University of Singapore (NUS). He is also a deputy director with the Interactive and Digital Media Institute (IDMI) at NUS and co-director of the Centre of Social Media Innovations for Communities (COSMIC). Earlier he held the position of Research Area Director with the Integrated Media Systems Center (IMSC) at the University of Southern California (USC). Among his research interests are mobile video management, streaming media architectures, distributed systems, spatio-temporal data management and location-based services. He has co-authored six patents and more than two-hundred peer-reviewed articles in the aforementioned areas. Roger is on the editorial boards of the IEEE Multimedia Communications Technical Committee (MMTC) R-Letter and the Springer International Journal of Multimedia Tools and Applications (MTAP). Additionally, he is an associate editor for the ACM Transactions on Multimedia Computing, Communications and Applications journal (TOMM) and he is currently serving as the secretary of ACM SIGSPATIAL. He has participated on the conference program committees of many leading conferences and as reviewer of many journals. He received his Ph.D. and M.S. degrees from USC.