FDD-LTE下載雙流占比及速率提升總結(jié)

1、2013 Nokia Solutions and Networks. All rights reserved.合肥電信合肥電信FDD-LTE下載雙流占比及速率提升總結(jié)下載雙流占比及速率提升總結(jié)2014.1.2822013 Nokia Solutions and Networks. All rights reserved.8-Apr-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use1 問題描述2 問題定位分析3 試驗效果4 總結(jié)合肥電信FDD LTE下載雙流占比及速率提

2、升32013 Nokia Solutions and Networks. All rights reserved.8-Apr-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use問題描述問題描述RSRP:-87dBmSINR:15dBCQI:11 合肥電信LTE網(wǎng)絡(luò)DT下載速率異常問題：UE在無線環(huán)境良好的情況下，UE上報的RI多為1，下行數(shù)據(jù)流一直以單流傳輸，影響DT測試下載速率，此類問題現(xiàn)象普遍存在。單驗極好點CQT測試一致占用雙流，速率正常。42013 Nokia

3、Solutions and Networks. All rights reserved.8-Apr-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use1 問題描述2 問題定位分析3 試驗效果4 總結(jié)合肥電信FDD LTE下載雙流占比及速率提升52013 Nokia Solutions and Networks. All rights reserved.8-Apr-22Document ID / Version number / Life cycle status / D

4、epartment / AuthorFor internal use問題定位分析問題定位分析1、參數(shù)核查核查單雙流轉(zhuǎn)換參數(shù)CQI/RI門限設(shè)置，與Golden配置一致參數(shù)名稱參數(shù)名稱現(xiàn)網(wǎng)配置現(xiàn)網(wǎng)配置GoldenGolden參數(shù)描述參數(shù)描述 mimoOlCqiThD 77回落單流的CQI門限mimoOlCqiThU 88啟用雙流的CQI門限mimoOlRiThD 1.41.4回落單流的RI門限mimoOlRiThU 1.61.6啟用雙流的RI門限2、核查RRU與天線之間跳線連接方式 安徽電信NSN 區(qū)域FDD LTE基站采用通宇和京信的2T4R天線，每一面天線有4個Pipe，2個+45極化方向和

5、2個-45極化方向。RI=1比例過高的話，需要查看天線連接，以及兩個極化方向是否隔離度過低從工程方面了解到，在基站安裝施工中，RRU兩路TX/RX收發(fā)復(fù)用端口均與天線的兩路+45Pipe相連。無法起到極化分極作用。62013 Nokia Solutions and Networks. All rights reserved.8-Apr-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use1 問題描述2 問題定位分析3 整改及效果驗證4 總結(jié)合肥電信FDD LTE下載雙流占

6、比及速率提升72013 Nokia Solutions and Networks. All rights reserved.8-Apr-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use整改及效果驗證整改及效果驗證推薦天線接線方式通宇2T4R天線京信2T4R天線Tx/RxTx/RxTx/RxTx/RxRRU兩路TX/RX收發(fā)復(fù)用端口分別連接天線外側(cè)的+45和-45Pipe，如下圖。RCU82013 Nokia Solutions and Networks. All ri

7、ghts reserved.8-Apr-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use整改及效果驗證整改及效果驗證Step1：選取兩個試點整改并進行拉遠測試日志名稱日志名稱PDCPCPDCPC層下載層下載速率速率（mbpsmbps）上報上報RANK1RANK1采采樣占比樣占比上報上報RANK2RANK2采采樣占比樣占比單流時長單流時長占比占比雙流時雙流時長占比長占比單流流量單流流量占比占比雙流流量雙流流量占比占比婦幼保健醫(yī)院Cell2_調(diào)整前-118.286.4%1

8、3.6%86.8%13.2%68.9%31.1%婦幼保健醫(yī)院Cell2_調(diào)整后-121.965.3%34.7%68.1%31.9%38.7%61.3%婦幼保健醫(yī)院Cell2_調(diào)整后-21670.6%29.4%75.0%25.0%43.3%56.7%婦幼保健醫(yī)院Cell2_調(diào)整后-337.944.7%55.3%39.5%60.5%9.4%90.6%肥西國稅局Cell1_調(diào)整前-13854.8%45.2%65.4%34.6%42.0%58.0%肥西國稅局Cell1_調(diào)整前-231.688.8%11.2%90.0%10.0%78.2%21.8%肥西國稅局Cell1_調(diào)整后-133.291.2%8.8

9、%91.6%8.4%83.7%16.3%肥西國稅局Cell1_調(diào)整后-243.646.2%53.8%57.4%42.6%37.1%62.9%選擇兩個基站進行整改，并進行鎖定小區(qū)PCI的拉遠測試；測試結(jié)果統(tǒng)計如下表，測試數(shù)據(jù)樣本較少，測試結(jié)果波動大；需擴大整改試驗規(guī)模92013 Nokia Solutions and Networks. All rights reserved.8-Apr-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use整改及效果驗證整改及效果驗證Ste

10、p2：選擇一個縣區(qū)進行整改45.750.92025303540455055肥東_跳線整改前肥東_跳線整改后肥東整改前后肥東整改前后FTP下載下載PDCP層平均速率層平均速率（Mbps）35.1%48.0%62.1%77.9%0.0%20.0%40.0%60.0%80.0%100.0%雙流時長占比雙流流量占比肥東整改前后肥東整改前后雙流時長及流量占比對比雙流時長及流量占比對比肥東_跳線整改前肥東_跳線整改后選取肥東縣城區(qū)域基站進行跳線整改；區(qū)域內(nèi)總共32個基站，整改完成31個，完成整改比例96.88%；整改后下載速率及雙流占比提升明顯102013 Nokia Solutions and Netw

11、orks. All rights reserved.8-Apr-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use整改及效果驗證整改及效果驗證Step3：全網(wǎng)整改45.750.941.549.741.950.5631.252.745.448.944.650.70102030405060肥東_整改前肥東_整改后肥西_整改前肥西_整改后長豐_整改前長豐_整改后磨店_整改前磨店_整改后長批_整改前長批_整改后雙鳳_整改前雙鳳_整改后整改前后各區(qū)域整改前后各區(qū)域PDCP層下載速

12、率對比（層下載速率對比（Mbps）整改后，PDCP層下載速率提升明顯。全網(wǎng)平局速率由41.7Mbps，提升到50.58Mbps，提升21.29%合肥電信諾西區(qū)域已開通118個站點，完成跳線整改111個，完成整改比例94.07%112013 Nokia Solutions and Networks. All rights reserved.8-Apr-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use整改及效果驗證整改及效果驗證Step3：全網(wǎng)整改整改后，雙流時長占比提升

13、明顯，全網(wǎng)平均雙流時長占比由41.8%，提升到63.6%，提升約22個百分點。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%肥東_整改前肥東_整改后肥西_整改前肥西_整改后長豐_整改前長豐_整改后磨店_整改前磨店_整改后長批_整改前長批_整改后雙鳳_整改前雙鳳_整改后整改前后各區(qū)域下載雙流時長占比對比整改前后各區(qū)域下載雙流時長占比對比122013 Nokia Solutions and Networks. All rights res

14、erved.8-Apr-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use整改及效果驗證整改及效果驗證Step3：全網(wǎng)整改整改后，雙流流量占比提升明顯，全網(wǎng)平均雙流時長占比由56.1%，提升到77.8%，提升約22個百分點。測試指標統(tǒng)計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%肥東_整改前肥東_整

15、改后肥西_整改前肥西_整改后長豐_整改前長豐_整改后磨店_整改前磨店_整改后長批_整改前長批_整改后雙鳳_整改前雙鳳_整改后整改前后各區(qū)域下載雙流整改前后各區(qū)域下載雙流流量流量占比對比占比對比132013 Nokia Solutions and Networks. All rights reserved.8-Apr-22Document ID / Version number / Life cycle status / Department / AuthorFor internal use1 問題描述2 問題定位分析3 效果驗證4 總結(jié)合肥電信FDD LTE下載雙流占比及速率提升142013 Nokia Solutions and Networks. All rights reserved.8-Apr-2