摘要
D2D通信采取重用蜂窝系统内传统的UE用户的资源来提升系统的资源利用率。文章提出"D干扰域"的概念,作为判断是否重用某个特定的UE用户资源的依据。结合最优的模式选择方案和资源分配算法,对单蜂窝系统下的两种通信场景做出了仿真研究。场景一的仿真环境有一对D2D设备和多个UE用户,仿真结果验证了D2D通信可以提高资源利用率,也表明增加重用的UE数目可以提升系统性能。场景二的仿真环境中存在多对D2D设备,仿真结果表明在蜂窝内大部分区域,尤其靠近小区边缘时,并非重用可用的最大ue用户数才能获得最佳性能。具体的数目和"D干扰域"有关。文章的研究结论对D2D设备通信的多用户资源重用研究具有指导意义。
D2D communication reuse resource of the traditional UE users to improve the utilization rate of whole cellular system resources. The article defined the ＂ D interference field ＂ concept, a judgment as to whether or not reuse the resource of a specific UE user. Together with optimal model selection scheme and the resource allocation algorithm, this article simulated on two different communication scenes in one simple cell. There are several UEs and one D2D pair in scene one, the simulation results further validate the D2D communication can improve the utilization rate of resources, and the results also show the system performance improves when the number of reused LIEs increases. Different with scene one, there are several D2D pairs in the cell. The simulation results show that in most area of the cell, especially around the edge of the cell, the number of reused UEs is not the largest available number to get the best performance. The reused number is associated with the＂ D interference field ＂. The conclusions of this paper on the D2D multi-user resource reuse have guiding significance.
出处
《软件》
2012年第12期242-245,共4页
Software
关键词
D2D通信
蜂窝网络
资源重用
频谱效率
D2D
cellular network
resource allocation and reuse
spectrum efficiency
