CAJ | 학술논문

本文针对TD-LTE网络在高铁覆盖场景下的组网，分析了其对TD-LTE系统产生的影响及网络覆盖要求。针对高铁覆盖场景下的多普勒频移、小区频繁切换、高穿透损耗三大难题分别提出解决方案：频偏补偿克服多普勒频移、合理站址布局克服车体高穿透损耗、多CP组网方式克服小区间频繁切换。文章最后介绍了高铁专网测试中开启9：3：2特殊时隙配比提升业务下载速率。
본문침대TD-LTE망락재고철복개장경하적조망，분석료기대TD-LTE계통산생적영향급망락복개요구。침대고철복개장경하적다보륵빈이、소구빈번절환、고천투손모삼대난제분별제출해결방안：빈편보상극복다보륵빈이、합리참지포국극복차체고천투손모、다CP조망방식극복소구간빈번절환。문장최후개소료고철전망측시중개계9：3：2특수시극배비제승업무하재속솔。
Based on the high-speed rail TD-LTE networking coverage, this paper analyses the elements which effect on TD-LTE system. The paper gives the solutions to serve the high-speed rail coverage problems:doppler shift, frequency switch, high penetration loss. The main solution is that frequency offset compensation to overcome the doppler frequency shift, reasonable layout of the site to overcome the high penetration loss, multi cyclic prefix to overcome frequent switching. Finally, high-speed rail network test based on the 9:3:2 special time slot allocation to improve the download rate.