Aiming at the problem that the reuse of spectrum resources in the device-to-device (D2D) communication leads to the same-frequency interference in the heterogeneous cellular networks and affects the communication performance of the system, a resource reuse algorithm for the device-to-device communication based on the combination mode was proposed.In order to comprehensively consider the needs of both cellular and D2D users in the heterogeneous networks and balance the resource allocation between two kinds of different users, the CU-D2D combination set was established with the proposed algorithm through combining the cellular and D2D modes based on determining the limiting distance of D2D communication.In addition, the weighted throughput gain of combination set was taken as the user priority, based on which the combination set of wireless resources was performed.Therefore, the optimal allocation of spectrum resources in the cellular heterogeneous network environment was realized.The results show that the proposed algorithm can not only ensure the transmission rate of cellular users, but also effectively improve the transmission rate of D2D users, and thus the algorithm can integrally improve the system communication performance of cellular heterogeneous networks.%针对异构蜂窝网络中终端直通(D2D)通信复用频谱资源导致同频干扰,并影响系统通信性能的问题,提出了一种基于联合模式的支持终端直通的资源复用算法.为了综合考虑异构网络中蜂窝用户和D2D用户需要并平衡两类不同用户的资源分配,该算法在确定D2D通信限制距离的基础上,联合蜂窝与D2D两种模式构建CU-D2D组合集,以其加权吞吐量增益为用户优先级,并据此进行无线资源分配,从而实现了异构蜂窝网络环境下频谱资源的优化分配.结果表明,该算法在保证蜂窝用户传输速率的同时,有效地改善了D2D用户的通信速率,从而整体性地提升了异构蜂窝网络的系统通信性能.
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