Video caching in Radio Access Network: Impact on delay and capacity

We introduce distributed caching of videos at the base stations of the Radio Access Network (RAN) to significantly improve the video capacity and user experience of mobile networks. To ensure effectiveness of the massively distributed but relatively small-sized RAN caches, unlike Internet content delivery networks (CDNs) that can store millions of videos in a relatively few large-sized caches, we propose RAN-aware reactive and proactive caching policies that utilize User Preference Profiles (UPPs) of active users in a cell. Furthermore, we propose video-aware backhaul and wireless channel scheduling techniques that, in conjunction with edge caching, ensure maximizing the number of concurrent video sessions that can be supported by the end-to-end network while satisfying their initial delay requirements and minimize stalling.In networks where the wireless channel bandwidth may be constrained, application of our video-aware wireless channel scheduler results in significantly (up to 250%) higher video capacity with very low stalling probability.

Autorentext

Il Prof. Vikas D. Chavan è professore assistente presso la Facoltà di Ingegneria del Campus Tecnico Yashoda, Satara, Dipartimento di Informatica e Ingegneria. Ha conseguito un master in ingegneria informatica presso la Savitribai Phule Pune University. Ha 8 anni di esperienza nell'insegnamento e 2 anni di esperienza nell'industria del software.