基于QoS的D2D资源分配算法

D2D通讯技术是5G通讯的一项关键技术,其最大的特点是数据无需经由基站转发并且能够有效地提升系统容量,提高频带利用率.但是它也存在一定缺陷,由于通讯过程中会占用原有蜂窝信道,D2D用户会对原始的小区用户产生干扰,并且这是一个两种用户相互干扰的过程.因此,D2D资源分配成为D2D技术引入的关键.为了克服在“一对一”D2D频谱分配过程中,每个D2D对仅可以占用一个移动信道的分配方式下,新加入D2D用户不一定会使得总容量变大这一问题,文中提出的算法兼顾了资源分配与功率控制两个方面.实验结果表明,在规定每对D2D用户可占用多个基站小区信道,新加入D2D用户不能使系统总容量减小的条件下,新的算法能有效地提升D2D用户总容量.

QoS-Aware Resource Allocation for D2D Communications

D2D(Device-to-device)communication is the key to 5G communication,Its biggest feature is that the data does not need to be transmitted through the base station,and it can effectively improve the system capacity and frequency band utilization.However,because the original cellular channel will be occupied in the communication process,D2D users will interfere with the original cell users,and this is a process of mutual interference between two kinds of users.Therefore,D2D resource allocation becomes the key to the introduction of D2D technology.In order to overcome the problem that each D2D pair can occupy only one mobile channel in the"one-to-one"D2D spectrum allocation process,adding a new D2D pair will not necessarily increase the total capacity.The algorithm proposed in this paper takes both resource allocation and power control into account.The experimental results show that the new algorithm can effectively improve the total capacity of D2D pair under the condition that each D2D pair can occupy multiple cell channels of base station and the new D2D can not reduce the total capacity of the system.