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2021-10-29Zeitschriftenartikel DOI: 10.3390/fi13110278
Online Service Function Chain Deployment for Live-Streaming in Virtualized Content Delivery Networks: A Deep Reinforcement Learning Approach
Cevallos Moreno, Jesús Fernando cc
Sattler, Rebecca cc
Caulier Cisterna, Raul cc
Ricciardi Celsi, Lorenzo cc
Sánchez Rodríguez, Aminael
Mecella, Massimo cc
Mathematisch-Naturwissenschaftliche Fakultät
Video delivery is exploiting 5G networks to enable higher server consolidation and deployment flexibility. Performance optimization is also a key target in such network systems. We present a multi-objective optimization framework for service function chain deployment in the particular context of Live-Streaming in virtualized content delivery networks using deep reinforcement learning. We use an Enhanced Exploration, Dense-reward mechanism over a Dueling Double Deep Q Network (E2-D4QN). Our model assumes to use network function virtualization at the container level. We carefully model processing times as a function of current resource utilization in data ingestion and streaming processes. We assess the performance of our algorithm under bounded network resource conditions to build a safe exploration strategy that enables the market entry of new bounded-budget vCDN players. Trace-driven simulations with real-world data reveal that our approach is the only one to adapt to the complexity of the particular context of Live-Video delivery concerning the state-of-art algorithms designed for general-case service function chain deployment. In particular, our simulation test revealed a substantial QoS/QoE performance improvement in terms of session acceptance ratio against the compared algorithms while keeping operational costs within proper bounds.
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DOI
10.3390/fi13110278
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https://doi.org/10.3390/fi13110278
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<a href="https://doi.org/10.3390/fi13110278">https://doi.org/10.3390/fi13110278</a>