LTE使用未授权频段的方法研究  

RESEARCH ON LTE USING UNLICENSED FREQUENCY BAND

作　　者：胡恒恒 周斌[1] 郑敏[1] 俞凯[1] 

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《计算机应用与软件》2017年第6期130-136,共7页Computer Applications and Software

基　　金：中国科学院战略性先导科技专项(A类)(XDA0611100);上海市自然科学基金(13ZR1440700)

摘　　要：将LTE技术引入到未授权频段是解决蜂窝系统频谱资源紧张的方法之一。首先阐述LTE引入到未授权频段所存在的共存挑战,针对LTE利用LBT策略中的FBE结构实现共存所存在的侦听信道机会少且侦听位置固定的缺陷,提出一种增强型FBE(E-FBE)结构。该结构引入随机退避过程,可以让LTE依据信道状态更加灵活地侦听信道。仿真结果表明该结构可以解决WIFI在与LTE共存时被LTE压制吞吐量的问题,实现和谐共存。The introduction of L T E technology into the unlicensed band is one of the methods to solve the spectrum resource constraints of cellular systems. Describe the coexistence challenges that L T E introduces into unlicensed bands. In this paper, an enhanced FBE （E - FBE ） structure is proposed for the L T E with F B E structure in L B T strategy to achieve the coexistence of fewer interception channel opportunities and fixed listening position. The structure introduces a random backoff procedure that allows L T E to listen for channels more flexibly based on the channel state. The simulation results show that, when WIFI and L T E coexist, this structure can solve the problem of L T E suppressed throughput and realize harmonious coexistence.

关 键 词：LTE 未授权频段 WIFI LBT FBE 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]