Joint Relay Selection and Resource Allocation for Relay-Assisted D2D Underlay Communications

Miaomiao Liu, Li Zhang, Prabhat Raj Gautam
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引用次数: 4

Abstract

Relay-assisted D2D (Device-to-device) communication as a supplement to direct D2D communications for enhancing LTE-A system capacity has been proposed. In this paper, a joint mode selection, relay selection and resource allocation optimization in relay-assisted D2D communications is addressed. We aim at maximizing the overall system throughput while guaranteeing the power limitations and signal-to-noise-and-interference ratios (SINR) requirements of all cellular and active D2D links. After decomposing the original design problem into two sub-problems: 1) Optimal Power Allocation (OPA); 2) Joint Mode selection, Relay selection and Channel allocation (JMRC), we then propose the corresponding algorithms to solve them sequentially. Simulation results show that our proposed scheme significantly outperforms the existing schemes.
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中继辅助D2D底层通信的联合中继选择和资源分配
中继辅助D2D(设备到设备)通信作为直接D2D通信的补充,用于增强LTE-A系统容量。本文研究了中继辅助D2D通信中的联合模式选择、中继选择和资源分配优化问题。我们的目标是最大限度地提高整体系统吞吐量,同时保证所有蜂窝和有源D2D链路的功率限制和信噪比和干扰比(SINR)要求。将原设计问题分解为两个子问题:1)最优功率分配(OPA);2)联合模式选择、中继选择和信道分配(JMRC),提出相应的算法依次求解。仿真结果表明,该方案明显优于现有方案。
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