动态信道切换及静默策略下的LTE-U共存方案

A LTE-U Coexistence Scheme Based on Dynamic Channel Switching and Muting Strategy

提出了一种针对非授权频段的长期演进(LTE-U)系统在5 GHz非授权频段与WIFI系统共存的方案.该方案基于先听后说(LBT)信道接入机制,通过引入动态信道切换技术,有效避免了因LTE-U系统长时间占用同一信道而对无线保真(WIFI)系统造成的干扰.在此基础上,对LBT机制中的静默时长进行了优化,以进一步提升LTEU与WIFI系统共存的效率.理论分析和实验结果表明,所提方案可使LTE-U与WIFI在同频段和谐共存,并取得较好的系统性能.

Based on listen before talk（ LBT） channel access mechanism,a scheme allowing the LTE-U system coexistence with WIFI system in 5 GHz unlicensed band was proposed. At the same time,by introducing the dynamic channel switching technology,it is effective to avoid the interference to the WIFI system caused by the LTE-U system which occupies the same channel for a long time. On this basis,the silence length of the LBT mechanism is optimized to further enhance the coexistence efficiency with the WIFI system. Experiments show that the proposed scheme can make LTE-U and WIFI coexist well in the same frequency band and achieve a better system performance.