Quality-Aware DASH Video Caching Schemes at Mobile Edge

Mobile edge caching will represent a 5G service able to improve the quality of experience of users served on mobile networks. Video streaming is the candidate traffic category which will leverage such service. In turn, the availability of rate-adaptive video playout mechanisms on board of mobile terminals will improve the video-streaming experience and offer a novel dimension to optimize caching policies in a site-dependent fashion. In this paper we present new rate-aware caching schemes able to optimize the cache composition both versus popularity of video contents and the aggregated users' video rate demand. Several algorithms are proposed and compared against their rate-agnostic counterparts. Extensive numerical results provide evaluation of the relative advantage of this new class of caching policies.