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Small-net vs. relays in a heterogeneous low energy LTE architecture
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Guo, Weisi and O'Farrell, Tim (2012) Small-net vs. relays in a heterogeneous low energy LTE architecture. Journal of Communications, 7 (10). pp. 716-725. doi:10.4304/jcm.7.10.716-725 ISSN 1796-2021.
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Official URL: http://dx.doi.org/10.4304/jcm.7.10.716-725
Abstract
The paper analyzes the energy consumption impact of introducing heterogeneous elements to a homogeneous deployment. Two contrasting low energy heterogeneous architectures are investigated: small cells (Small-Nets) and wireless relays. The investigation employs a multi-cell multi-user dynamic LTE simulator and both deployments are investigated for a range of urban traffic loads. The paper shows that compared to a homogeneous baseline deployment of micro-cells, both deployments reduce the total radio network energy consumption significantly (50 to 60%). The Small-Net approach reduces energy consumption by deploying more low power cells with a macro-overlay and achieves increased network capacity by spectrum reuse. The relaying approach reduces energy consumption by deploying fewer macro-cells and increases network capacity through increasing cell-edge performance. A combination of deployment factors were investigated in order to find the lowest energy architecture within the heterogeneous deployments. For a range of targeted traffic loads, it was found that the lowest energy solution depends on the percentage of high mobility traffic. If the percentage of high-mobility users is below 8%, the Small-Net architecture is the lowest energy architecture. Otherwise, the wireless cell-edge relaying concept offers a greater energy reduction. The paper also presents theoretical upper-bounds on energy reduction for a fixed and changing deployment.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
Journal or Publication Title: | Journal of Communications | ||||
Publisher: | Elsevier Ltd. | ||||
ISSN: | 1796-2021 | ||||
Official Date: | October 2012 | ||||
Dates: |
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Volume: | 7 | ||||
Number: | 10 | ||||
Number of Pages: | 10 | ||||
Page Range: | pp. 716-725 | ||||
DOI: | 10.4304/jcm.7.10.716-725 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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