NDLI: Capacity maximization of energy-harvesting small cells with dynamic sleep mode operation in heterogeneous networks

Content Provider	IEEE Xplore Digital Library
Author	Chen-Yi Chang Kun-Lin Ho Wanjiun Liao Da-shan Shiu
Copyright Year	2014
Description	Author affiliation: Grad. Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei, Taiwan (Chen-Yi Chang; Kun-Lin Ho; Wanjiun Liao; Da-shan Shiu)
Abstract	In this paper, we investigate how to utilize renewable energy harvested by small cells to increase network capacity. Specifically, we try to maximize the average capacity of a small cell with the harvested energy from the environments (e.g., solar and wind) with constraints on energy causality and battery capacity. With the coverage preserved by the umbrella cells, we investigate the potential of capacity improvement by dynamic on-off operations of small cells. We propose a heuristic polynomial-time near-optimal algorithm for joint power control and sleep-awake scheduling of this mixed-integer optimization problem. The capacity obtained by the proposed heuristic algorithm can approach the maximal capacity as long as the small cell can be equipped with a battery with large enough capacity. In the simulations, we demonstrate that our proposed algorithm can increase system capacity by 25%. We find that always attempting to keep a small cell in active state may not be always a good strategy for capacity maximization even when the optimal transmit power allocation is applied.
Starting Page	2690
Ending Page	2694
File Size	267852
Page Count	5
File Format	PDF
ISBN	9781479920037
DOI	10.1109/ICC.2014.6883730
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-10
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Resource management Batteries Power control Schedules Heuristic algorithms Joints Optimization resource allocation energy harvesting power-saving BS HetNets sleep mechanism sleep-awake scheduling
Content Type	Text
Resource Type	Article

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