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from Part II - Proactive Caching
Published online by Cambridge University Press: 19 October 2020
Driven by the inherent spatiotemporal correlation in wireless data demand, cellular network design is becoming increasingly content-centric. An integral component of this new paradigm is the network's ability to cache popular content at its edge, which includes base stations, access points, and handheld devices. This additionally reduces latency, which is one of the key challenges facing the next generation of cellular networks. As discussed in the earlier chapters, the huge size of a typical library of popular files and the relatively smaller storage capacities of edge devices, especially small cell base stations (SCBSs) and handheld devices, make it necessary to carefully determine the set of files (cache) that should be placed on each device. Compared to a wireless network for which caching mechanisms are fairly well understood, a distinctive feature of content-centric wireless networks is the mobility of the end users, which needs to be included in the system design. Inspired by this, we investigate the impact of mobility on edge caching in this chapter.
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