LTE-U(LTE in unlicensed spectrum)是近来3GPP标准化组织讨论研究的用于缓解授权频段通信压力的新兴技术。首先对LTE-U技术进行概述,随后分析了LTE-U的工作频谱和设计要求,同时总结了其可能的部署场景和运行模式,然后对部署LTE-U存在的难点和现有的应用解决方案的相关研究进行了详细阐述,最后对未来的研究方向进行了展望。
Recently, a new technology called LTE-U proposed by 3GPP is under study. It aims to relieve the pressure in licensed spectrum. Firstly, an overview of LTE-U was presented, and then the working frequency spectrum and design principles were analyzed. The possible deployment scenarios and operation modes of LTE-U were also summarized. The difficulties in deploying LTE-U and existing solutions were discussed particularly.Finally, several possible future research directions of LTE-U were presented.