BANDWIDTH CONSUMPTION AND LATENCY TRADE OFF IN VIDEO STREAMING OVER SDN (QOE BASED ANALYSIS)

Abstract

This paper examines the trade-off between bandwidth usage and latency in video streaming using Software Defined Networking (SDN), which is a limitation of the current literature since it considers the values of these two parameters separately instead of being joint. The research will seek to investigate their joint influence on Quality of Experience (QoE) and give a more comprehensive perspective on streaming performance. The SDN-based controlled SDN-based testbed was used as a quantitative experimental design with the implementation in Mini-net and the Ryu controller. VLC was used in video streaming, and network conditions like bandwidth (1-3 Mbps), latency and network packet loss were varied systematically. The metrics of QoE such as the startup delay and buffering incidents were measured and studied. The findings indicate that high-resolution video (38402160) took up to approximately 3 seconds to start and buffering at 1 Mbps, whereas low-resolution video (640360) took approximately 1 second before starting up and buffering without buffering. At 3 Mbps, high-resolution streams did experience continuous buffering, which validated that bandwidth and latency affect QoE in concert. The empirical evidence of bandwidthlatency interaction in SDN settings presented in the study and the necessity of combined QoE optimization frameworks.