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Zamani, Mohammad Reza
- A TLBO-Based Energy Efficient Base Station Switch off and User Subcarrier Allocation Algorithm for OFDMA Cellular Networks
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Authors
Affiliations
1 Department of Electrical and Electronics Engineering, Shiraz University of Technology, IR
1 Department of Electrical and Electronics Engineering, Shiraz University of Technology, IR
Source
ICTACT Journal on Communication Technology, Vol 9, No 3 (2018), Pagination: 1805-1814Abstract
Downlink of a cellular network with orthogonal frequency-division multiple access (OFDMA) is considered. Joint base station switch OFF and user subcarrier-allocation with guaranteed user quality of service, is shown to be a promising approach for reducing network’s total power consumption. However, solving the aforementioned mix-integer and nonlinear optimization problem requires robust and powerful optimization techniques. In this paper, teaching-learning based optimization algorithm has been adopted to lower cellular network’s total power consumption. The results show that the proposed technique is able to reduce network’s total power consumption by determining a near optimum set of base stations to be switched OFF and near optimum subcarrier-user assignments. It is shown that the proposed scheme is superior to existing base station switch OFF schemes. Robustness of the proposed TLBO-based technique is verified.Keywords
Energy Efficiency, Green Cellular Network, Base Station Switching, Optimization, TLBO Algorithm.
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