Baris Yamansavascilar

Research Scientist

Fault Tolerance in SDN Data Plane

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. 

Related Publications:

[Conference]

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

[Conference]

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

[Journal]

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