本项目针对无线频谱资源日益紧缺的问题，从MAC层和网络层的角度，对实现LTE-U与WiFi系统非授权频段共存的理论与方法展开系统、深入的研究，主要研究内容包括LTE-U与WiFi系统非授权频段共存场景下的融合网络架构、频谱感知、干扰协调、载波聚合和频谱接入等关键问题及其解决方法。通过本项目的研究，力图在实现LTE-U与WiFi系统非授权频段共存理论与方法方面取得一些突破性进展，产生一批具有国际影响力的原创性研究成果，为实现LTE-U与WiFi系统在非授权频段的合理共存，解决无线频谱资源紧缺问题，提供有力的理论依据和技术支撑。

To address the increasingly scare radio spectrum resources problem, this project deeply and systematically studies the theory and techniques for LTE-U and WiFi coexistence in unlicensed spectrum from the perspectives of the medium access control (MAC) layer and the network layer. The main resource contents of this project include the converged network architecture, spectrum sensing, interference coordination, carrier aggregation, and channel access problems in a LTE-U and WiFi coexistence scenario, and corresponding solutions. Through this project, it is expected to make a certain breakthrough the theory and techniques for LTE-U and WiFi coexistence in unlicensed spectrum, and achieve a batch of original research results with international influence in order to provide strong theory basis and technological support for making the reasonable coexistence of LTE-U and WiFi systems in unlicensed spectrum.