Load-Balancing for Edge QoE-Based VNF Placement for OTT Video Streaming

Over The Top (OTT) service providers require platforms to support distributed, complex, cloud-oriented, scalable, micro-service based systems. Such systems require on-the-fly placement of Virtual Network Functions (VNF) to support streaming and transcoding of content based on QoE feedback provided by the end-user. This paper proposes a QoE Scheme to support on-the-fly virtual network functions deployment for OTT video streaming and transcoding. The QoE feedback considers limited cloud resources, transcoding requirements, throughput and latency. Both horizontal and vertical scaling strategies (including VM migration) are discussed to cover up availability and reliability of intermediate and edge Content Delivery Network (CDN) cache nodes.