Failures in networks result in service disruptions which may cause deteriorated Quality of Service (QoS) for the end-users. Since SDN is becoming the mainstream paradigm for networks, the implementation of a robust fault tolerance scheme for SDN-based networks is crucial. Moreover, that robust fault tolerance scheme should ensure the stability for QoS and Quality of Experience (QoE). To this end, we investigated
A novel dynamic protection method considering the quality of alternative paths.
How video quality and thus QoE would fluctuate when a failure occurs.
The effect of the detection of the congestion in the link layer operating Bidirectional Forwarding Detection (BFD) rather than the application layer.
The impact of BFD intervals on the QoE parameters along with the video segment size to come up with a feasible operational range where the fault tolerance approach is beneficial for the congestion case.
Note that this study was my thesis subject in my MS studies.
Fault Tolerant Data Plane using SDN , Baris Yamansavascilar, Ahmet Cihat Baktir, Atay Ozgovde, and Cem Ersoy, 25th Signal Processing and Communications Applications Conference (SIU), Antalya, Turkey, 2017, 2017
Enhancing QoE for Video Streaming Considering Congestion: A Fault Tolerance Approach , Baris Yamansavascilar, Ahmet Cihat Baktir, Atay Ozgovde, and Cem Ersoy, IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS), Paris, France, 2019
Fault Tolerance in SDN Data Plane Considering Network and Application Based Metrics , Baris Yamansavascilar, Ahmet Cihat Baktir, Atay Ozgovde, and Cem Ersoy, Journal of Network and Computer Applications (JNCA), Vol. 170, Pg. 102780, 2020