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iTREE: Intelligent Traffic and Resource Elastic Energy scheme for Cloud-RAN

Sigwele, Tshiamo
; 
Pillai, Prashant
; 
Hu, Yim Fun
Publication Date
2015-10-26
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Keywords
Pooling gain, Cloud RAN, Cloud computing, BBU reduction, Green energy
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© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
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openAccess
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Engineering and Digital Technology Publications
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Abstract
By 2020, next generation (5G) cellular networks are expected to support a 1000 fold traffic increase. To meet such traffic demands, Base Station (BS) densification through small cells are deployed. However, BSs are costly and consume over half of the cellular network energy. Meanwhile, Cloud Radio Access Networks (C-RAN) has been proposed as an energy efficient architecture that leverage cloud computing technology where baseband processing is performed in the cloud. With such an arrangement, more energy gains can be acquired through statistical multiplexing by reducing the number of BBUs used. This paper proposes a green Intelligent Traffic and Resource Elastic Energy (iTREE) scheme for C-RAN. In iTREE, BBUs are reduced by matching the right amount of baseband processing with traffic load. This is a bin packing problem where items (BS aggregate traffic) are to be packed into bins (BBUs) such that the number of bins used are minimized. Idle BBUs can then be switched off to save energy. Simulation results show that iTREE can reduce BBUs by up to 97% during off peak and 66% at peak times with RAN power reductions of up to 27% and 18% respectively compared with conventional deployments.
URI
http://hdl.handle.net/10454/11130
Version
Accepted manuscript
Citation
Sigwele T, Pillai P and Hu Y-F (2015) iTREE: Intelligent Traffic and Resource Elastic Energy scheme for Cloud-RAN. In: 2015 3rd International Conference on Future Internet of Things and Cloud (FiCloud). 24-26 Aug 2015, Rome, Italy.
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https://doi.org/10.1109/FiCloud.2015.104
Type
Conference paper
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