LTE室分干扰微观诊断分析法研究
2021-05-09陈小鹏冯楠黄光平
陈小鹏 冯楠 黄光平



摘 要:通过LTE室分干扰微观诊断分析法论述,系统提出了LTE室内分布系统干扰诊断思路、排查流程、各种干扰原因分析及解决方案,并采用理论和实测相结合的方式,针对各种原因定位、解决方案等关键环节进行具体解析,最后总结出运用LTE室分微观诊断分析法排查室分干扰建议,流程清晰,定位准确,对LTE室分干扰排查整治具有较好的指导及推广作用。
关键词:LTE室内分布系统;干扰;GPS;时钟偏置;同频;杂散;阻塞;互调;屏蔽器
中图分类号:TN929.5 文献标识码:A文章编号:2096-4706(2021)20-0050-05
Research on the Microcosmic Diagnose Analytical Method
of LTE Indoor Distribution System Interference
CHEN Xiaopeng FENG Nan HUANG Guangping
(1.Network Optimization Center, Xian Branch of China Mobile Communications Group Shaanxi Co., Ltd., Xian 710071, China; 2.Xian LuBang Information Technology Co., Ltd., Xian 710065, China)
Abstract: This paper systematically puts forward the interference diagnosis idea, troubleshooting process, various interference cause analysis and solutions of LTE indoor distribution system, and uses the combination of theory and actual measurement to analyze specifically the key links such as various cause positioning and solutions. Finally, it summarizes the suggestions of using LTE indoor distribution system microcosmic diagnose analysis method to troubleshoot indoor distribution system interference, which has clear process and accurate positioning and plays a good role in guiding and promoting in LTE indoor distribution system interference troubleshooting and remediation.
Keywords: LTE indoor distribution system; interference; GPS; clock bias; same frequency; scattered; obstruction; intermodulation; shield
0 引 言
随着无线通信市场的快速发展,以及对数据业务需求的爆发,室内分布系统已成为吸收话务量、解决深度覆盖并提升用户感知的主要手段,是移动网络的重要组成部分。相关统计表明,在4G时代,发生在室内的业务占比达到70%,随着室分应用场景从过去单系统、低载波配置到现在多载波、多系统合路场景的转变,对无源器件(合路器、电桥、耦合器、电桥、馈线接头)的质量和性能要求越来越高。随着现网器件的老化和部分新入网器件的质量下降,在一些室内分布系统话务量较高的时段出现干扰等级过高现象,通过站点的实时观测,发现话务量高峰时期,通信系统的上行全频段范围内均出现底噪抬升问题,在KPI指标中具体表现为掉话次数多或掉话率居高不下,切换成功率低等一系列问题,严重影响用户的感知体验。因此,LTE室内干扰排查整治显得尤为重要,加大LTE室分干扰排查整治力度,有效降低全网干扰小区比例,改善干扰小区网管关键KPI,降低因上行干扰造成用户投诉比例,实现客户感知整体提升。……
