https://scholars.lib.ntu.edu.tw/handle/123456789/398259
Title: | ENCORE: An Energy-Aware Multicell Cooperation in Heterogeneous Networks with Content Caching | Authors: | Yi-Han Chiang Wanjiun Liao WANJIUN LIAO |
Keywords: | Content caching; Cooperative transmission; Coordinated multipoint (CoMP); Dynamic clustering; Heterogeneous network (HetNet); Multicell cooperation; Sleep mode operation | Issue Date: | Jul-2016 | Source: | IEEE INFOCOM 2016 | Abstract: | Energy saving in cellular systems is increasingly important due to ever-deteriorating global warming. Heterogeneous networks (HetNets) composed of various tiers of cells can attain energy savings thanks to the lower operational and transmit power consumptions of small cells. To address the inter-cell interference problem yet achieving network energy conservation, multicell cooperation facilitating cooperative transmission (also known as coordinated multipoint or CoMP) and sleep mode operation paves a way toward future green HetNets. To further alleviate the induced backhaul energy consumption caused by cooperative transmission, content caching which proactively caches popular files at local storages is regarded as a viable solution. In this paper, we investigate how energy-aware multicell cooperation in HetNets with content caching (ENCORE) can be achieved. On proving that the ENCORE problem is decomposable into two sub-problems, we claim that the place-then-transmit strategy is optimal to the ENCORE problem. Then, we design algorithms for the sub-problems and prove that the total energy consumption achieved by the proposed solution is upper-bounded. Our simulation results demonstrate that the proposed solution outperforms various dynamic clustering approaches in terms of energy savings, and show the impacts of content popularity and cache size on the backhaul energy consumption. © 2016 IEEE. |
URI: | http://scholars.lib.ntu.edu.tw/handle/123456789/398259 | DOI: | 10.1109/INFOCOM.2016.7524623 | SDG/Keyword: | Energy conservation; Energy utilization; Global warming; Power management; Power management (telecommunication); Content caching; Cooperative transmission; Coordinated multi point (CoMP); Dynamic clustering; Heterogeneous Network (HetNet); Multi-cell cooperations; Sleep mode operations; Heterogeneous networks |
Appears in Collections: | 電機工程學系 |
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