近期F站点已陆续开通,目前规划区内存在D1/D2/E1/E2/F五个频点,对于D与F双层网区域的参数设置,与鲁工讨论后确定如下,日常优化工作发现参数设置不合理或者存在问题时及时反馈。再次提醒,F频点站点开通后需要认真对D+F双层组网做好优化调整工作: 一、参数设置原理 重选方面:通过设置D的更高优先级(D=5,F=4),在空闲模式下优先占有D频段(只要D频段信号强度满足-102dBm);在D频段小区信号低于-102dBm时,开始启动空闲模式的异频测量,重选到F小区。 切换方面: (1)占用D频点时,A2起测门限设置-90dBm,D-D小区之间切换采用A2+A3的切换;D-F小区之间切换采用A2+A5,其中a5Threshold1Rsrp设置为-105,a5Threshold2Rsrp设置为-110(D到F的切换,当D小区的电平低于-105且F高于-110时,切换到F) (2)占用F时,起测门限A2设置为-90,采样A2+A5的切换策略,A51设置-80,A52设置为-102(F服务小区低于-80dBm且D目标小区高于-102dBm) 二、参数设置: 2.1对于F站点: 空闲态重选: (1)EUtranFreqRelation =38400,cellReselectionPriority=4;threshXHigh=20(对应-102dBm) (2)EUtranFreqRelation =37900/38098,cellReselectionPriority=5;37900/38098比F频点的站优先级高,所以在F频段的站一直测量这个频点,当D频点的小区的信号强度大于这个参数值时threshXHigh=20(在Qrxlevmin设置为-122时,对应-102dBm),不管此时F频段的站点信号强度是多少均重选到D频段,这样近距离D频段强的时候用D频段吸收业务 (3)EUtranFreqRelation =38950/39148,cellReselectionPriority=4;(在F设置E的优先级和F一致,避免空闲模式太容易重选的室内) 激活态切换,注意激活态目前同系统的没有优先级这个说法,空闲态才有重选优先级 (4)A2测量门限ReportConfigSearch :a1a2SearchThresholdRsrp =-90,解释:当占用到F频段的站点时信号强度低于-90开始异频测量 (5)EUtranFreqRelation::interFreqMeasType=0 (采样A2+A5的异频切换) ReportConfigA5:: a5Threshold1Rsrp=-80 ReportConfigA5:: a5Threshold2Rsrp=-102 上面参数的意思就是同时满足F频段信号强度低于-80时,D频段信号强度高于-102时切换到D频段 F站点相关指令: set EUtranFreqRelation=37900 cellReselectionPriority 5
set EUtranFreqRelation=38098 cellReselectionPriority 5
set EUtranFreqRelation=38400 cellReselectionPriority 4 set EUtranFreqRelation=38950 cellReselectionPriority 4
set EUtranFreqRelation=39148 cellReselectionPriority 4
set EUtranFreqRelation=38400 threshXHigh 20
set EUtranFreqRelation=37900 threshXHigh 20
set EUtranFreqRelation=38098 threshXHigh 20 set EUtranFreqRelation=38950 threshXHigh 20
set EUtranFreqRelation=39148 threshXHigh 20
set ReportConfigSearch a1a2SearchThresholdRsrp -90 set EUtranFreqRelation=37900 interFreqMeasType=0 set EUtranFreqRelation=38098 interFreqMeasType=0 set ReportConfigA5 a5Threshold1Rsrp=-80 set ReportConfigA5 a5Threshold2Rsrp=-102 2.2 对于D站点: 空闲太重选 (1)EUtranFreqRelation =34800,cellReselectionPriority=4,threshXLow=16 低优先级频点必须满足的重选门限之一,(qrxlevmin+16,-122+16=-106)就是说D重选到F的其中的一个条件是F频段大于-106dBm (2)EUtranFreqRelation =37900/38098,cellReselectionPriority=5;threshXHigh=22(对应-100dBm); (3)EUtranFreqRelation =38950/39148,cellReselectionPriority=5;(在D设置E的优先级和D一致,避免空闲模式太容易重选的室内) (4)systemInformationBlock3_threshServingLow=18(对应-104dbm) 低优先级频点必须满足的重选门限之一,主覆盖D频点的有信号强度低于-104 这里还有一个参数没说sNonIntraSearch,空闲中异频段的起侧门限,现网应该是30,则(-122+30=-92,开始空闲态的异频测量) 激活态切换 (5)A2测量门限ReportConfigSearch :a1a2SearchThresholdRsrp =-90 EUtranFreqRelation=37900/38098::interFreqMeasType=1 (采样A2+A3的异频切换) EUtranFreqRelation=38400::interFreqMeasType=0 (采样A2+A5的异频切换) (6)s-NonIntraSearch(异频异系统重选参数),SIB3::sNonIntraSearch=20 (7)EUtranFreqRelation =38950/39148,cellReselectionPriority=4; D站点相关指令: set EUtranFreqRelation=37900 cellReselectionPriority 5
set EUtranFreqRelation=38098 cellReselectionPriority 5
set EUtranFreqRelation=38400 cellReselectionPriority 4 set EUtranFreqRelation=38950 cellReselectionPriority 5
set EUtranFreqRelation=39148 cellReselectionPriority 5
set EUtranFreqRelation=37900 threshXHigh 22
set EUtranFreqRelation=38098 threshXHigh 22 set EUtranFreqRelation=38950 threshXHigh 22
set EUtranFreqRelation=39148 threshXHigh 22 set EUtranFreqRelation=38400 threshXLow 16 set EUtranCellTDD systemInformationBlock3 threshServingLow=18 set EUtranCellTDD systemInformationBlock3 sNonIntraSearch=20 set ReportConfigSearch a1a2SearchThresholdRsrp -90
set EUtranFreqRelation=37900 interFreqMeasType=1 set EUtranFreqRelation=38098 interFreqMeasType=1 set EUtranFreqRelation=38400 interFreqMeasType=0 set ReportConfigA5 a5Threshold1Rsrp=-105 set ReportConfigA5 a5Threshold2Rsrp=-110
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