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Energy Minimization for Cache-Assisted Content Delivery Networks With Wireless Backhaul
University of Luxembourg, Luxembourg City, 1855, Luxembourg. (Signal Processing)ORCID iD: 0000-0003-2298-6774
2018 (English)In: IEEE Wireless Communications Letters, ISSN 2162-2337, E-ISSN 2162-2345, Vol. 7, no 3, p. 332-335Article in journal (Refereed) Published
Abstract [en]

Content caching is an efficient technique to reduce delivery latency and system congestion during peak-traffic time by bringing data closer to end users. In this letter, we investigate energy-efficiency performance of cache-assisted content delivery networks with wireless backhaul by taking into account cache capability when designing the signal transmission. We consider multi-layer caching and the performance in cases when both base station and users are capable of storing content data in their local cache. Specifically, we analyze energy consumption in both backhaul and access links under two uncoded and coded caching strategies. Then two optimization problems are formulated to minimize total energy cost for the two caching strategies while satisfying some given quality of service constraint. We demonstrate via numerical results that the uncoded caching achieves higher energy efficiency than the coded caching in the small user cache size regime.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018. Vol. 7, no 3, p. 332-335
Keywords [en]
Content distribution networks;Energy consumption;Minimization;Quality of service;Throughput;Wireless communication;Edge caching;energy efficiency;optimization;wireless backhaul
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-258980DOI: 10.1109/LWC.2017.2776924ISI: 000436010400013Scopus ID: 2-s2.0-85035778425OAI: oai:DiVA.org:kth-258980DiVA, id: diva2:1350503
Note

QC 20190912

Available from: 2019-09-11 Created: 2019-09-11 Last updated: 2019-09-12Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • de-DE
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  • en-US
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  • nn-NB
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  • Other locale
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Output format
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