Social Network Aware Caching for 5G Radio Access Network

Abstract

Next-generation 5G networks are envisioned to support ultra low latency, leveraging the benefits of caching at radio access network (RAN). While the low latency is proliferated by proactive caching, cache efficiency depends on caching the right data. Social behaviour of mobile users and highly evolved learning algorithms are the new trends to support the network evolution for improved quality of experience to the users. In this paper, we explore a proactive caching scheme that takes the advent of social ties of mobile users accessing the cached contents. By exploring users behaviour and cached content properties, the proposed system not only increases cache efficiency but also improves 5G network capabilities. Simulation with real-world observations shows 14% − −28% improvements in the cache hit ratio with reduced cache replacement rate. Application of the proposed caching policy with hierarchical video caching in 5G network improves delay by 10%.