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11 - Cache-Enabled Cloud Radio Access Networks

from Part III - Cache-Aided Interference and Physical Layer Management

Published online by Cambridge University Press:  19 October 2020

Edited by
Thang X. Vu ,
Ejder Baştuğ ,
Symeon Chatzinotas  and
Tony Q. S. Quek
Thang X. Vu
Affiliation:
Université du Luxembourg
Ejder Baştuğ
Affiliation:
Nokia Bell Labs, France
Symeon Chatzinotas
Affiliation:
Université du Luxembourg
Tony Q. S. Quek
Affiliation:
Singapore University of Technology and Design
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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.

Keywords

edge cachingcontent-centric networkscloud radio access networksquality of servicebackhaul throughput reduction
Type
Chapter
Information
Wireless Edge Caching
Modeling, Analysis, and Optimization
 , pp. 217 - 235
Publisher: Cambridge University Press
Print publication year: 2021

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