多小区CDMA系统D2D通信上行性能研究

摘要

Device-to-Device(D2D) communication attracts much research attention due to its ability to increase the efficiency of cellular networks.However,performance of D2D communication in multi-cell cellular systems is not fully addressed.Aiming at this problem,this paper analyzes the uplink capacity when D2D communication is enabled in a multi-cell Code Division Multiple Access(CDMA) system.System level simulation is conducted to evaluate the uplink capacity gain of D2D link and its affecting factors.Simulation results show that D2D communication provides significant capacity gain.In addition,the performance gain decreases with D2D link distance and increases with the position of the link in system,but stays almost constant over different system loads.%端到端(D2D)通信因能够提高蜂窝网的资源利用率而受到广泛关注.为研究D2D通信在多小区蜂窝系统中的应用性能,对多小区码分多址(CDMA)系统中引入D2D链路后的上行容量进行理论分析,通过系统级仿真,研究D2D链路的上行容量增益和影响该增益的主要因素.仿真结果表明,在多小区系统中,D2D链路能带来明显的容量增益,且链路性能与通信距离和链路在系统中的位置有关,而与系统负荷的关系不大.