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  • 11 - Cache-Enabled Cloud Radio Access Networks

  • from Part III - Cache-Aided Interference and Physical Layer Management
  • Edited by Thang X. Vu, Université du Luxembourg, Ejder Baştuğ, Symeon Chatzinotas, Université du Luxembourg, Tony Q. S. Quek, Singapore University of Technology and Design
  • Book:
    Wireless Edge Caching
    Published online:
    19 October 2020
    Print publication:
    11 March 2021, pp 217-235

  • Summary

    This chapter presents a content-centric framework for transmission optimization in cloud radio access networks (RANs) by leveraging wireless edge caching and physical-layer multicasting. We consider a cache-enabled cloud RAN, where each base station (BS) is equipped with a local cache and connected to a central processor (CP) via a backhaul link. The BSs acquire the requested contents either from their local caches or from the core network via the backhaul links. We first study the caching effects on multicast-enabled access downlink, where users requesting the same content are grouped together and served by the same BS or BS cluster using multicasting. We study the cache-aware joint design of the content-centric BS clustering and multicast beam-forming to minimize the system total power cost and backhaul cost subject to the quality-of-service (QoS) constraints for each multicast group.