Caching-Based Scalable Video Transmission Over Cellular Networks
Liang Wu, Wenyi Zhang · IEEE Communications Letters · 2016
In this letter, caching-based scalable video transmission over cellular networks under constrained backhaul is considered, where popular videos encoded by scalable video coding are cached at base stations. Joint caching and transmission schemes are proposed considering the impacts of two intrinsic characteristics of videos, namely, popularity and quality. Moreover, mutually dependent relationship between the backhaul capacity and caching-based transmission scheme is also studied. A comprehensive analysis is conducted leveraging tools from stochastic geometry. It is shown that the proposed caching-based transmission schemes not only reduce reduplicative traffic by improving backhaul traffic offloading, but also enhance user satisfaction by providing differentiated user services and reduced video transmission delay.