一种基于D2D集群的资源分配模型

A Resource Allocation Model Based on D2D Cluster

随着无线通信的发展,用户对移动通信的要求也有所上升,D2D作为5G的关键技术之一,随着用户数量的增加,在蜂窝与D2D同时进行通信时,为了解决在多D2D(Device To Device)用户数时难以有效判断复用组合以及针对目标为D2D用户时的模式分析过程过于复杂等问题,在设置了最小Qos情况下,基于D2D用户集群的方式提出一种新型分析模型。首先通过用户权重最优算法确定集群中心用户,对于边缘用户归属采用最优Qos原则,对于群外用户采取水平路损分析。通过仿真分析表明,所提模型在水平面上的用户分布具有较好的覆盖度,大大减少了计算时的复杂度,为接下来的系统整体研究提供了基础。其中平均冗余用户比例低于0.98%,平均遗漏用户比例低于0.65%,平均完成时间比例降低36.8%。

With the development of wireless communication,the demand for mobile communication has also increased. D2D is one of the key technologies of 5G. With the increase of the number of users,as the cellular and D2D are communicating simultaneously,in order to solve the problem that it is difficult to judge the multiplexing combination effectively when the number of D2D users is too much and the process of pattern analysis is too complicated when the target is D2D user,a new analysis model based on D2D user cluster is proposed by setting the minimum Qis. Firstly, the cluster central users are determined by the optimal user weight algorithm;the optimal QoS principle is used for the edge user ownership,and the horizontal path loss analysis is adopted for the out-of-group users. The simulation results show that the proposed model has better coverage on the horizontal plane and the computational complexity is greatly reduced,which provides the basis for the following research of the whole system. The average proportion of redundant users is less than 0.98% and the proportion of missing users is lower than 0.65%,the ratio of the average completion time is reduced by 36.8%.