LTE-A网络下支持终端直通的资源复用选择策略  

Resource reusing selection scheme for device-to-device communication underlaying LTE-A networks

作　　者：张锐[1] 李勇朝[1] 崔建国[1] 梁海涛[1] 王文焕[2] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071 [2]中兴通讯股份有限公司西安研发中心,陕西西安710114

出　　处：《西安电子科技大学学报》2016年第2期17-22,共6页Journal of Xidian University

基　　金：综合业务网理论及关键技术国家重点实验室资助项目(ISN090105);国家111创新引智基地资助项目(B08038);国家重大科技专项资助项目(2013ZX03003008-004);新世纪优秀人才支持计划资助项目(NCET-12-0918;72131855);高等学校博士学科点专项科研基金资助项目(20120203110002);中兴通讯产学研论坛资助项目(REQ201410080001)

摘　　要：LTE-A网络下的终端直通技术通过复用蜂窝链路资源,可提高频谱利用率,减轻基站负担.然而资源复用引起的同频干扰,不仅会降低终端直通用户性能,还会损害蜂窝用户的通信质量.笔者通过对干扰引起的信干噪比下降进行选择性补偿,以系统功率增加量最小为准则,为终端直通用户选择蜂窝复用用户.仿真分析表明,该方法在保证原有蜂窝用户和终端直通用户通信质量的前提下,能够大幅提高终端直通用户准许接入网络的概率,并提升了系统的频谱利用率.Device-to-Device（D2D）communication underlaying LTE-A cellular networks is effective to improving spectral efficiency and offload traffic of the base station by reusing cellular resources.However,the mutual interference between D2 Dand cellular communications can degrade the performance of both D2 D and cellular users.In this paper,a resource reusing selection scheme based on minimizing power increase is proposed,which enables selective compensation for signal to interference plus noise ratio（SINR）diminution caused by interference.Simulation results demonstrate that the proposed scheme notably improves the access grant probability of D2 Dusers and increases the link spectral efficiency of D2 Dand cellular networks,without sacrificing the quality of cellular and D2 Dcommunication.

关 键 词：终端直通 资源复用选择 功率补偿 信干噪比 

分 类 号：TN929.5[电子电信—通信与信息系统]