@InProceedings{Farahani2021a, author = {Reza Farahani and Farzad Tashtarian and Hadi Amirpour and Christian Timmerer and Mohammad Ghanbari and Hellwagner, Hermann}, booktitle = {2021 IEEE 46th Conference on Local Computer Networks (LCN)}, title = {{CSDN: CDN-Aware QoE Optimization in SDN-Assisted HTTP Adaptive Video Streaming}}, year = {2021}, month = {oct}, pages = {525--532}, publisher = {IEEE}, abstract = {Recent studies have revealed that network-assisted techniques, by providing a comprehensive view of the network, improve HTTP Adaptive Streaming (HAS) system performance significantly. This paper leverages the capability of Software-Defined Networking, Network Function Virtualization, and edge computing to introduce a CDN-Aware QoE Optimization in SDN-Assisted Adaptive Video Streaming (CSDN) framework. We employ virtualized edge entities to collect various information items and run an optimization model with a new server/segment selection approach in a time-slotted fashion to serve the clients’ requests by selecting optimal cache servers. In case of a cache miss, a client’s request is served by an optimal replacement quality from a cache server, by a quality transcoded from an optimal replacement quality at the edge, or by the originally requested quality from the origin server. Comprehensive experiments conducted on a large-scale testbed demonstrate that CSDN outperforms other approaches in terms of the users’ QoE and network utilization.}, doi = {10.1109/lcn52139.2021.9524970}, keywords = {Dynamic Adaptive Streaming over HTTP (DASH), Edge Computing, Network-Assisted Video Streaming, Quality of Experience (QoE), Software Defined Networking (SDN), Network Function Virtualization (NFV), Video Transcoding, Content Delivery Network (CDN)}, url = {https://ieeexplore.ieee.org/document/9524970} }