Resource allocation problems in full-duplex orthogonal frequency division multiple access (FD-OFDMA) networks are challenging due to their combinatorial, non-convex nature. In this paper, user pairing, subcarrier and power allocation in a single cell FD-OFDMA network are considered. A joint optimization problem is formulated to maximize the network's sum rate while satisfying downlink (DL) and uplink (UL) transmission power’ constraints. Due to the sheer complexity of the proposed formulation, mainly due to its combinatorial nature, an efficient, iterative two-step solution algorithm for the joint problem is proposed. In the first step, based on defining the DL user equipment (UE) signal to noise ratio (SNR) threshold, which is the least SNR that can be detected by the DL-UE, an algorithm is proposed for user pairing and subcarrier assignment. In the second step, the power allocation problem for the assigned users’ pairs is formulated and solved using the Alternating Direction Method of Multipliers (ADMM) in the high signal-to-interference-noise ratio regime. Finally, numerical results are presented to validate the performance of the proposed algorithms. We show that the performance of our proposed computationally-efficient two-step algorithm is very close to the sum rate upper bound derived from solving the dual problem.

中文翻译：

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全双工 OFDMA 网络中具有分布式上行链路功率控制的联合资源管理

全双工正交频分多址 (FD-OFDMA) 网络中的资源分配问题由于其组合、非凸性质而具有挑战性。本文考虑了单小区FD-OFDMA网络中的用户配对、子载波和功率分配。联合优化问题被公式化以在满足下行链路 (DL) 和上行链路 (UL) 传输功率约束的同时最大化网络的总速率。由于所提出的公式非常复杂，主要是由于其组合性质，因此提出了一种针对联合问题的高效、迭代两步求解算法。在第一步中，基于定义DL用户设备(UE)信噪比(SNR)阈值，即DL-UE可以检测到的最小SNR，提出了用户配对和子载波分配的算法。在第二步中，使用交替方向乘法器方法 (ADMM) 在高信噪比机制中制定并解决指定用户对的功率分配问题。最后，给出了数值结果来验证所提出算法的性能。我们表明，我们提出的计算效率高的两步算法的性能非常接近从解决对偶问题得出的总和率上限。