摘 要：LTE-U 采用LTE 技术，运行于非授权频段，可用于补充4G 移动通信系统的频谱资源，提供更高的用户速率。在非授权频段，LTE-U 会干扰现存的WiFi 移动通信系统，严重时还会影响WiFi 系统的正常运行，而CSAT 机制可有效解决该问题。本研究提出基于干扰检测的LTE-U 与WiFi 共存算法，不增加LTE-U 基站硬件功能，采用CSAT 机制，基于干扰检测自适应调整LTE-U 基站的开启时间，降低LTE-U 系统对WiFi 系统的负面影响，使得LTE-U 和WiFi 可以在非授权频段下正常提供服务，并通过仿真验证该共存算法能保证LTE-U 和WiFi 系统的性能。
关键词：LTE-U；WiFi；CSAT；共存算法
中图分类号：TN929.5 文献标识码：A 文章编号：2096-4706（2018）07-0060-04
Research on the Coexistence Method of LTE-U and WiFi
WANG Xinxin
（Jingxin Communication System（China）Co.，Ltd.，Guangzhou 510663，China）
Abstract：LTE-U adopts LTE technology and runs in unauthorized frequency bands，which can be used to supplement the spectrum resources of 4G mobile communication system and provide higher user rate. In the unauthorized frequency band，LTE-U will interfere with the existing WiFi mobile communication system，which will affect the normal operation of the WiFi system seriously，and the CSAT mechanism can effectively solve the problem. In this paper，a coexistence algorithm of LTE-U and WiFi based on interference detection is proposed，which does not increase the hardware function of LTE-U base station，uses CSAT mechanism，adaptively adjusts the opening time of LTE-U base station based on interference detection，and reduces the negative influence of LTE-U system on the WiFi system， so that LTE-U and WiFi can provide services in unauthorized frequency bands. Simulation results show that the coexistence algorithm can guarantee the performance of LTE-U and WiFi systems.
Keywords：LTE-U；WiFi；CSAT；coexistence algorithm
参考文献：
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作者简介：王鑫芯（1987.06-）, 女，汉族，湖北人，通信技术中级职称，硕士，研究方向：移动通信技术。