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Resource allocation in multicell systems with coordinated beamforming and partial data cooperation: a study on the effect of cooperation on achievable performance

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Abstract

The rise in wireless data traffic requires innovative interference management techniques to meet the demand. Transmit cooperation among multiple base stations has been proposed as a solution to this challenge and improve throughput. This paper proposes novel resource allocation algorithms with two different cooperation paradigms, viz. the cooperative beamforming and partial data cooperation. The well-known duality principle, which has been used to solve uplink and downlink optimisation problems in previous literature, is shown to exist for multicell systems with both coordinated beamforming and the novel paradigm termed as partial data cooperation. Using the generalised version of duality, this paper solves relevant resource allocation problems in both cases. The proposed power allocation problems are shown to outperform some of the existing optimisation techniques in terms of throughput while having significant conceptual and theoretical advantage.

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Notes

  1. Analyses of full duplex communication requires modelling of the self-interference [9], which is not within the scope of this work.

  2. For broadcast systems, the channel vector is a column, hence the Hermitian is multiplied with the transmit column vector to obtain a scalar.

  3. This is different from the complexity of encoding/decoding the bits using DPC.

  4. For notational convenience, in PDC schemes we denote the total number of UE by J, unlike the CBF case.

  5. (19b) can be proved by comparing \(\mathcal {S}^{{{\mathrm{DL}}}}(l-1, k)\) and \(\mathcal {S}^{{{\mathrm{DL}}}}(l, k)\) according to the definition from (18). Similarly, (19c) can be shown by comparing \(\mathcal {S}^{{{\mathrm{DL}}}}(L, k-1)\) and \(\mathcal {S}^{{{\mathrm{DL}}}}(1, k)\).

  6. This is in contrast with Algorithm 1, where the problems are solved parallely and solutions are independent.

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Acknowledgements

This work was supported by Singapore Ministry of Education Academic Research Fund Tier 1 grant. The authors also thank the anonymous reviewers and the editor for their constructive comments and suggestions which helped us to improve the quality of the paper.

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Authors and Affiliations

  1. School of Computer Science and Engineering, Nanyang Technological University, Nanyang Avenue, Jurong West, Singapore

    S. Barman Roy & A. S. Madhukumar

  2. Internet of Things Connectivity, Institute for Infocomm Research, Jurong West, Singapore

    Francois Chin

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  1. S. Barman Roy
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  2. A. S. Madhukumar
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  3. Francois Chin
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Correspondence to S. Barman Roy.

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Barman Roy, S., Madhukumar, A.S. & Chin, F. Resource allocation in multicell systems with coordinated beamforming and partial data cooperation: a study on the effect of cooperation on achievable performance. Wireless Netw 25, 1749–1762 (2019). https://doi.org/10.1007/s11276-017-1627-6

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