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Appl. Sci. 2017, 7(2), 148; doi:10.3390/app7020148

A Resource Allocation Scheme for Multi-D2D Communications Underlying Cellular Networks with Multi-Subcarrier Reusing

1
School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China
2
Department of Mathematics and Computer Science, Changsha University, Changsha 410022, China
*
Author to whom correspondence should be addressed.
Academic Editor: Elli Kartsakli
Received: 12 December 2016 / Revised: 16 January 2017 / Accepted: 25 January 2017 / Published: 7 February 2017
(This article belongs to the Special Issue Green Wireless Networks)
View Full-Text   |   Download PDF [2659 KB, uploaded 7 February 2017]   |  

Abstract

Device-to-device (D2D) communication is proposed as a promising technique of future cellular networks which fulfills its potential in terms of high resource utilization. In this paper, in order to improve the achievable rate of D2D communication and the spectrum utilization, we consider the scenario that multiple D2D pairs can share uplink spectrum resources with multiple cellular users (CUs). We aim to maximize the overall system spectrum efficiency while satisfying the rate requirements of all CUs and guaranteeing that the system gain is positive. We formulate the joint optimization problem of subcarrier assignment and power allocation which falls naturally into a mixed integer non-linear programming form that is a difficult problem to solve. Hence, we propose a two-stage resource allocation scheme which comprises a subcarrier assignment by employing a heuristic greedy strategy, as well as a power allocation algorithm based on the Lagrangian dual method. Numerical results demonstrate the advantageous performance of our scheme in greatly increasing the system sum spectrum efficiency. View Full-Text
Keywords: cellular network; multiple device-to-device (D2D) communication; mixed integer non-linear programming; multi-subcarrier reusing; power allocation cellular network; multiple device-to-device (D2D) communication; mixed integer non-linear programming; multi-subcarrier reusing; power allocation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zhang, Y.; Li, F.; Al-qaness, M.A.A.; Luan, X. A Resource Allocation Scheme for Multi-D2D Communications Underlying Cellular Networks with Multi-Subcarrier Reusing. Appl. Sci. 2017, 7, 148.

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