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Joint functional splitting and content placement for green hybrid CRAN
KTH, School of Electrical Engineering and Computer Science (EECS).
KTH, School of Electrical Engineering and Computer Science (EECS), Computer Science, Communication Systems, CoS, Radio Systems Laboratory (RS Lab).ORCID iD: 0000-0003-4006-5848
KTH, School of Electrical Engineering and Computer Science (EECS), Computer Science, Communication Systems, CoS, Radio Systems Laboratory (RS Lab).ORCID iD: 0000-0003-0525-4491
2019 (English)In: 2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2019Conference paper, Published paper (Refereed)
Abstract [en]

A hybrid cloud radio access network (H-CRAN) architecture has been proposed to alleviate the midhaul capacity limitation in C-RAN. In this architecture, functional splitting is utilized to distribute the processing functions between a central cloud and edge clouds. The flexibility of selecting specific split point enables the H-CRAN designer to reduce midhaul bandwidth, reduce latency, save energy, or distribute the computation task depending on equipment availability. Meanwhile, techniques for caching are proposed to reduce content delivery latency and the required bandwidth. However, caching imposes new constraints on functional splitting. In this study, considering H-CRAN, a constraint programming problem is formulated to minimize the overall power consumption by selecting the optimal functional split point and content placement, taking into account the content access delay constraint. We also investigate the trade-off between the overall power consumption and occupied midhaul bandwidth in the network. Our results demonstrate that functional splitting together with enabling caching at edge clouds reduces not only content access delays but also fronthaul bandwidth consumption and saves energy finding a compromise between these performance metrics.

Place, publisher, year, edition, pages
2019.
National Category
Communication Systems
Research subject
Information and Communication Technology
Identifiers
URN: urn:nbn:se:kth:diva-271326DOI: 10.1109/PIMRC.2019.8903627OAI: oai:DiVA.org:kth-271326DiVA, id: diva2:1416683
Conference
2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 8-11 September 2019 Istanbul, Turkey
Note

QC 20200327

Available from: 2020-03-25 Created: 2020-03-25 Last updated: 2020-03-27Bibliographically approved

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Publisher's full texthttps://ieeexplore.ieee.org/abstract/document/8903627

Authority records BETA

Sriram, AjayMasoudi, MeysamAlabbasi, AbdulrahmanCavdar, Cicek

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Sriram, AjayMasoudi, MeysamAlabbasi, AbdulrahmanCavdar, Cicek
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