FDD-LTE下载双流占比及速率提升总结

1、2013 Nokia Solutions and Networks. All rights reserved.合肥电信合肥电信FDD-LTE下载双流占比及速率提升总结下载双流占比及速率提升总结2014.1.2822013 Nokia Solutions and Networks. All rights reserved.6-Mar-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use1 问题描述2 问题定位分析3 试验效果4 总结合肥电信FDD LTE下载双流占比及速率提

2、升32013 Nokia Solutions and Networks. All rights reserved.6-Mar-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use问题描述问题描述RSRP:-87dBmSINR:15dBCQI:11 合肥电信LTE网络DT下载速率异常问题：UE在无线环境良好的情况下，UE上报的RI多为1，下行数据流一直以单流传输，影响DT测试下载速率，此类问题现象普遍存在。单验极好点CQT测试一致占用双流，速率正常。42013 Nokia

3、Solutions and Networks. All rights reserved.6-Mar-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use1 问题描述2 问题定位分析3 试验效果4 总结合肥电信FDD LTE下载双流占比及速率提升52013 Nokia Solutions and Networks. All rights reserved.6-Mar-22Document ID / Version number / Life cycle status / D

4、epartment / AuthorFor internal use问题定位分析问题定位分析1、参数核查核查单双流转换参数CQI/RI门限设置，与Golden配置一致参数名称参数名称现网配置现网配置GoldenGolden参数描述参数描述 mimoOlCqiThD 77回落单流的CQI门限mimoOlCqiThU 88启用双流的CQI门限mimoOlRiThD 1.41.4回落单流的RI门限mimoOlRiThU 1.61.6启用双流的RI门限2、核查RRU与天线之间跳线连接方式 安徽电信NSN 区域FDD LTE基站采用通宇和京信的2T4R天线，每一面天线有4个Pipe，2个+45极化方向和

5、2个-45极化方向。RI=1比例过高的话，需要查看天线连接，以及两个极化方向是否隔离度过低从工程方面了解到，在基站安装施工中，RRU两路TX/RX收发复用端口均与天线的两路+45Pipe相连。无法起到极化分极作用。62013 Nokia Solutions and Networks. All rights reserved.6-Mar-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use1 问题描述2 问题定位分析3 整改及效果验证4 总结合肥电信FDD LTE下载双流占

6、比及速率提升72013 Nokia Solutions and Networks. All rights reserved.6-Mar-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use整改及效果验证整改及效果验证推荐天线接线方式通宇2T4R天线京信2T4R天线Tx/RxTx/RxTx/RxTx/RxRRU两路TX/RX收发复用端口分别连接天线外侧的+45和-45Pipe，如下图。RCU82013 Nokia Solutions and Networks. All ri

7、ghts reserved.6-Mar-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use整改及效果验证整改及效果验证Step1：选取两个试点整改并进行拉远测试日志名称日志名称PDCPCPDCPC层下载层下载速率速率（mbpsmbps）上报上报RANK1RANK1采采样占比样占比上报上报RANK2RANK2采采样占比样占比单流时长单流时长占比占比双流时双流时长占比长占比单流流量单流流量占比占比双流流量双流流量占比占比妇幼保健医院Cell2_调整前-118.286.4%1

8、3.6%86.8%13.2%68.9%31.1%妇幼保健医院Cell2_调整后-121.965.3%34.7%68.1%31.9%38.7%61.3%妇幼保健医院Cell2_调整后-21670.6%29.4%75.0%25.0%43.3%56.7%妇幼保健医院Cell2_调整后-337.944.7%55.3%39.5%60.5%9.4%90.6%肥西国税局Cell1_调整前-13854.8%45.2%65.4%34.6%42.0%58.0%肥西国税局Cell1_调整前-231.688.8%11.2%90.0%10.0%78.2%21.8%肥西国税局Cell1_调整后-133.291.2%8.8

9、%91.6%8.4%83.7%16.3%肥西国税局Cell1_调整后-243.646.2%53.8%57.4%42.6%37.1%62.9%选择两个基站进行整改，并进行锁定小区PCI的拉远测试；测试结果统计如下表，测试数据样本较少，测试结果波动大；需扩大整改试验规模92013 Nokia Solutions and Networks. All rights reserved.6-Mar-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use整改及效果验证整改及效果验证Ste

10、p2：选择一个县区进行整改45.750.92025303540455055肥东_跳线整改前肥东_跳线整改后肥东整改前后肥东整改前后FTP下载下载PDCP层平均速率层平均速率（Mbps）35.1%48.0%62.1%77.9%0.0%20.0%40.0%60.0%80.0%100.0%双流时长占比双流流量占比肥东整改前后肥东整改前后双流时长及流量占比对比双流时长及流量占比对比肥东_跳线整改前肥东_跳线整改后选取肥东县城区域基站进行跳线整改；区域内总共32个基站，整改完成31个，完成整改比例96.88%；整改后下载速率及双流占比提升明显102013 Nokia Solutions and Netw

11、orks. All rights reserved.6-Mar-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use整改及效果验证整改及效果验证Step3：全网整改45.750.941.549.741.950.5631.252.745.448.944.650.70102030405060肥东_整改前肥东_整改后肥西_整改前肥西_整改后长丰_整改前长丰_整改后磨店_整改前磨店_整改后长批_整改前长批_整改后双凤_整改前双凤_整改后整改前后各区域整改前后各区域PDCP层下载速

12、率对比（层下载速率对比（Mbps）整改后，PDCP层下载速率提升明显。全网平局速率由41.7Mbps，提升到50.58Mbps，提升21.29%合肥电信诺西区域已开通118个站点，完成跳线整改111个，完成整改比例94.07%112013 Nokia Solutions and Networks. All rights reserved.6-Mar-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use整改及效果验证整改及效果验证Step3：全网整改整改后，双流时长占比提升

13、明显，全网平均双流时长占比由41.8%，提升到63.6%，提升约22个百分点。35.1%62.1%48.9%68.4%43.8%59.5%17.5%63.0%49.7%65.6%56.0%62.8%0.0%10.0%20.0%30.0%40.0%50.0%60.0%70.0%80.0%肥东_整改前肥东_整改后肥西_整改前肥西_整改后长丰_整改前长丰_整改后磨店_整改前磨店_整改后长批_整改前长批_整改后双凤_整改前双凤_整改后整改前后各区域下载双流时长占比对比整改前后各区域下载双流时长占比对比122013 Nokia Solutions and Networks. All rights res

14、erved.6-Mar-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use整改及效果验证整改及效果验证Step3：全网整改整改后，双流流量占比提升明显，全网平均双流时长占比由56.1%，提升到77.8%，提升约22个百分点。测试指标统计48.0%77.9%63.8%82.4%57.9%73.3%32.1%74.7%65.5%81.0%69.3%77.4%0.0%10.0%20.0%30.0%40.0%50.0%60.0%70.0%80.0%90.0%肥东_整改前肥东_整

15、改后肥西_整改前肥西_整改后长丰_整改前长丰_整改后磨店_整改前磨店_整改后长批_整改前长批_整改后双凤_整改前双凤_整改后整改前后各区域下载双流整改前后各区域下载双流流量流量占比对比占比对比132013 Nokia Solutions and Networks. All rights reserved.6-Mar-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use1 问题描述2 问题定位分析3 效果验证4 总结合肥电信FDD LTE下载双流占比及速率提升142013 Nokia Solutions and Networks. All rights reserved.6-Mar-2