LTE-A异构网中基于图论的干扰管理技术  

Graph Theory Based on Interference Management for LTE-A Hetnet

作　　者：罗佳[1] 唐伦[1] 陈前斌[1] 

机构地区：[1]重庆邮电大学无线传输技术研究所,重庆400065

出　　处：《电视技术》2014年第13期139-144,172,共7页Video Engineering

基　　金：国家科技重大专项(2014ZX03003010-004);重庆市自然科学基金项目(cstc2012jjA40049)

摘　　要：针对LTE-A异构网中的干扰问题,基于颜色敏感的图着色算法(CSGC)提出了一种基于优先级的干扰管理技术(PBIM)。首先将用户端的接收SINR与预设的门限值进行比较来建立小蜂窝间的干扰关系,随后建立整个系统的干扰图,并对干扰图中的不同连通图进行信道分配,分配过程避免将同一信道分配给相互干扰的小蜂窝,同时尽量减小对微峰窝的干扰。仿真结果表明,算法在避免同层干扰的同时也很大程度地减小了跨层干扰,并且在系统的容量和公平性之间取得了较好的平衡。In view of interference problem in LTE-A hetnet, a Priority Based Interference Management（PBIM） technology is proposed based on Color Sensitive Graph Coloriong. Firstly, SINR at UE is compared with predefined threshold to form interference relation among smallcells. Then interference graph of overall system is formed and different connected graphs of interference graph are allocated channels. Algorithm avoids allocating the same channel to smallcells which interfere with each other and alleviates interference to macrocell as much as possible. Simulation results show that the proposed algorithm can avoid co-tier interference, meanwhile can alleviate interference to Macrocell. Furthermore, the algorithm balance well between system capacity and fairness.

关 键 词：异构网 小蜂窝 同层干扰 跨层干扰 

分 类 号：TN929.5[电子电信—通信与信息系统]