D2D通信系统中一种资源分配算法的研究  

Resource allocation algorithm in D2D communication system

作　　者：文凯[1,2] 卢彦博[1] 刘敏[1] 凌亚[1] 

机构地区：[1]重庆邮电大学通信新技术应用研究中心,重庆400065 [2]重庆信科设计有限公司,重庆400065

出　　处：《南京邮电大学学报（自然科学版）》2015年第6期31-38,共8页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：重庆市自然科学基金(cstc2012jjA40054)资助项目

摘　　要：终端直通技术(Device-to-Device,D2D)引入LTE-A蜂窝网络虽然能够提高蜂窝系统性能,但是却带来了很大的干扰。为了降低干扰,提升系统性能,如何进行资源分配成为研究的重点。首先,为了降低资源分配算法的复杂度和干扰强度,提出了D2D通信限制区域和D2D用户限制复用蜂窝用户(Cellular User Equipmen,CUE)资源区域的概念。其次,为了保证蜂窝系统服务质量(Quality of Service,Qo S)需求并提升系统性能,提出了一种D2D资源分配算法。最后,使用非线性规划问题中的乘子法来确定D2D用户和CUE的最佳发射功率,以最大化系统吞吐量。仿真结果表明,所提算法与已有方案相比能够显著提升系统的吞吐量和公平性。The device-to-device（ D2D） communications in cellular networks improve the performance of the cellular system,but bring the interference. To reduce the interference and improve the system performance,the resource allocation is the research key point. Firstly,to reduce the complexity of resource allocation algorithm and interference,to the D2D communication restricted area and CUE resources are limited to reuse area. Secondly,a D2D resource allocation algorithm is used to improve the fairness and the throughput of the cellular system. Finally,the multiplier method for nonlinear programming problem is used to find the optimal transmit power of D2D users and CUE. Simulation results show that the proposed algorithm can improve the throughput of the system and the system fairness compared with the existing scheme.

关 键 词：D2D 区域 吞吐量 频谱效率 资源分配 功率控制 公平性 

分 类 号：TN929.5[电子电信—通信与信息系统]