摘要
FDD-LTE在网络制式和频段等方面不同于TDD-LTE,因此在高铁组网规划方面也有自身的特点,主要体现在覆盖性能相对于TDD-LTE网络较好,但受限于频段资源,FDD-LTE无法在1.8GHz频段上专网覆盖高铁,相关站点间干扰较大。针对这问题,首先通过仿真计算和实际的工程案例给出了多场景下FDD-LTE高铁规划中站间距及站轨距等关键参数的建议;随后在凹型地谷等特殊场景下大量使用贴近轨道的H杆,全线使用2T4R基站及天线等,并给出测试结果;最后通过多次网络测试及网管分析,验证了相关方案的切实可行,在短时间内打造了一张精品高铁网络,为其他地区FDD-LTE高铁覆盖建设提供了可靠的规划优化数据。
FDD-LTE is different from TDD-LTE in network mode and frequency band. Therefore, networking and planning of high-speed rail also have their own characteristics. Specifi cally, compared with TDD-LTE, FDD-LTE is featured by better network coverage, but limited by band resource resulting in the failure in high-speed rail coverage at 1.8GHz and larger interference between sites. In view of problems above, suggestions on key parameters in FDDLTE high-speed rail planning in multi-scenarios, such as site distance and gauge, were presented according to simulation computing and practical engineering cases. Then, H rod was widely used in the special scenario of concave valley, 2T4R based station and antennas were used across the board, and the corresponding tested results were given. Finally, the solution was verifi ed through multiple network tests and network management analyses. A fi ne high-speed rail network can be built in short time which provides reliable planning and optimization data to the constructions of FDD-LTE high-speed rail coverage in other areas.
出处
《移动通信》
2015年第20期5-8,13,共5页
Mobile Communications
关键词
LTE规划
高铁覆盖
站间距
站轨距
LTE planning
high-speed rail covering
station spacing
station gauge
