Caching Scalable Videos in the Edge of Wireless Cellular Networks

By pre-fetching popular videos into the local caches of edge nodes, wireless caching provides an effective means reducing repeated content deliveries. To meet various viewing quality requirements multimedia users, scalable video coding (SVC) is integrated with caching, where constituent layers are flexibly cached and transmitted to users. In this article, we discuss challenges arising from different popularity videos, present diverse types contents as well corresponding transmission schemes. We provide overview existing schemes, summarize criteria making decisions. A case study then presented, delay quantified used performance metric. Simulation results confirm that giving cognizance realistic end users capable significantly delay, compared schemes operating without SVC. The also verify proposed random scheme lower than which only gain.