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- Title
A downlink power control algorithm for long-term energy efficiency of small cell network.
- Authors
Kwon, Beom; Kim, Seonghyun; Lee, Hojae; Lee, Sanghoon
- Abstract
Recently, small cells have been densely deployed in hot spots and overlaid with macro cells in order to guarantee the quality of service for voluminous multimedia data. For a small cell network (SCN), the long-term energy efficiency is one of the most challenging issues for conserving energy while achieving link capacity over the air-interface. In this paper, we present a novel downlink power control scheme to maximize the long-term energy efficiency over a time division multiple access system, which includes multiple small cells and a central controller. Toward this goal, we formulate a long-term energy efficiency optimization problem by defining a long-term energy efficiency metric and performing an iterative algorithm to obtain optimal solutions in real-time via fast convergence. The simulation results show that the proposed metric is very effective at improving the long-term energy efficiency and conserving 8.1 % of the energy on average when compared to a conventional metric. In addition, it is verified that the proposed metric is more effective for an SCN, in particular, when the link capacity is severely degraded due to inter-cell interference.
- Subjects
CELL phone systems; ENERGY consumption; TIME division multiple access; ITERATIVE methods (Mathematics); ALGORITHMS; INTERFERENCE (Telecommunication)
- Publication
Wireless Networks (10220038), 2015, Vol 21, Issue 7, p2223
- ISSN
1022-0038
- Publication type
Article
- DOI
10.1007/s11276-015-0907-2