With increasing number of autonomous heterogeneous devices in future mobile
networks, an efficient resource allocation scheme is required to maximize
network throughput and achieve higher spectral efficiency. In this paper,
performance of network-integrated device-to-device (D2D) communication is
investigated where D2D traffic is carried through relay nodes. An optimization
problem is formulated for allocating radio resources to maximize end-to-end
rate as well as conversing QoS requirements for cellular and D2D user equipment
under total power constraint. Numerical results show that there is a distance
threshold beyond which relay-assisted D2D communication significantly improves
network performance when compared to direct communication between D2D peers.

本文研究了在未来移动网络中，由于自主异构设备的数量不断增加，需要一种有效的资源分配方案来最大化网络吞吐量和实现更高的频谱效率。通过构建优化问题，本文考察了网络集成的设备对设备（D2D）通信，在其中 D2D 流量通过中继节点传输。数值结果表明：当与 D2D 对等方之间的直接通信距离超出一个距离阈值时，中继辅助 D2D 通信显著提高了网络性能，从而最大化端到端传输速率以及基于总功率约束下蜂窝和 D2D 用户设备的转化 QoS 要求。