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终端直通(device-to-device,D2D)通信技术已成为第五代移动通信(5G)中的关键技术。资源分配直接关系着D2D通信的质量,是D2D通信中的重要研究内容。该文研究了OFDMA(orthogonal frequency division multiple access)蜂窝网络中的D2D通信,用统计服务质量(quality-of-service,QoS)保证来刻画用户的时延需求,在保证蜂窝用户的干扰门限要求下,以最大化统计带QoS保证的系统吞吐量为目标,提出了有效的资源分配算法。通过Lagrange方法求解原始优化问题,提出了交替式优化算法和渐进凸近似算法。仿真表明,所提方案能有效提升系统性能。
Device-to-device (D2D) communication technology has become the key technology in the fifth generation of mobile communication (5G). Resource allocation directly relates to the quality of D2D communication and is an important research content in D2D communication. This paper studies the D2D communication in OFDMA (orthogonal frequency division multiple access) cellular network, and uses the quality-of-service (QoS) guarantee to depict the user’s delay requirement. In order to ensure the interference threshold of cellular users , In order to maximize the statistical throughput with QoS guarantees as the goal, put forward an effective resource allocation algorithm. The Lagrange method is used to solve the original optimization problem. An alternating optimization algorithm and a progressive convex approximation algorithm are proposed. Simulation shows that the proposed scheme can effectively improve system performance.