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Optimized Joint Power and Resource Allocation for Coordinated Multi-point Transmission for Multi-user LTE-Advanced Systems

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Abstract

Recent research has shown that coordinated multi-point (CoMP) transmission can provide significant gains in terms of the overall throughput of cellular systems. The main purpose of this paper is to enhance the overall cell throughput and to optimize the power consumption in LTE-Advanced systems using CoMP. In particular, we present joint resource allocation, precoding and power allocation (PA) algorithms based on the signal-to-leakage-plus-noise-ratio (SLNR) for the CoMP downlink. The proposed resource allocation and precoding algorithm selects the user equipment that can efficiently share the same resource block in the same cell without degrading the overall throughput by using the SLNR metric. This sharing is possible due to the existence of multiple transmitters within a cell in a CoMP setting. Additionally, we propose a set of PA algorithms that significantly improve the overall throughput and reduce the power consumption. The PA algorithms are based on solving a set of constrained convex optimization problems using the log-barrier penalty function approach based on the Newton method. We evaluate the proposed PA algorithms by comparing them to the iterative water-filling (IWF) algorithm. Performance evaluation results show that the proposed SLNR-based PA algorithms provide considerable performance gains in terms of the overall system throughput and are also shown to have even less power consumption compared to the IWF.

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Acknowledgments

This work was carried out as part of the 4G++ research project supported by the National Telecom Regulatory Authority (NTRA) of Egypt.

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Authors and Affiliations

  1. Department of Electrical Engineering and Computer Science, University of California, Irvine, CA, 92697, USA

    Rana A. Abdelaal

  2. Department of Electronics and Communications Engineering, Cairo University, Giza, 12613, Egypt

    Khaled M. F. Elsayed & Mahmoud H. Ismail

  3. Department of Electronics and Communications Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, UAE

    Mahmoud H. Ismail

Authors
  1. Rana A. Abdelaal
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  2. Khaled M. F. Elsayed
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  3. Mahmoud H. Ismail
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Correspondence to Rana A. Abdelaal.

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Abdelaal, R.A., Elsayed, K.M.F. & Ismail, M.H. Optimized Joint Power and Resource Allocation for Coordinated Multi-point Transmission for Multi-user LTE-Advanced Systems. Wireless Pers Commun 83, 2497–2518 (2015). https://doi.org/10.1007/s11277-015-2543-7

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  • DOI: https://doi.org/10.1007/s11277-015-2543-7

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