LTE基站重要无线参数设置
建议书（初稿）
中国电信股份有限公司运维部
二零一四年十月
-1-
编写说明：《LTE基站重要无线参数设置建议书（初稿）》主要针对中兴、华
为、上海贝尔三家LTE主设备厂家重要无线参数设置进行梳理，通过建网初期试验形成，供网优工程师在进行参数优化时参考。。
本建议书初稿涵盖LTE无线参数有限，给出的建议值也并非适合所有场景，需要在实际优化工作中不断总结和修订。希望各省（市）网优工程师提出宝贵意见，协助我们共同完成建议书的完善工作。
编制历史：
版本 V2.0 更新日期 2015.1 主要撰写人 集团运维部 上海电信 上海电信 上海电信 上海电信 上海电信 李建光 李波 姚坚 许浩 金益源 张卢华
-2-
目 录
1. 小区属性参数 ....................................................................................................................... 3
1.1. referenceSignalPower ..................................................................................... 3 1.2. cellIndividualOffset(Ocs) ................................................................................ 3 1.3. PA .......................................................................................................................... 4 1.4. PB .......................................................................................................................... 5 2. 小区选择和重选参数 ........................................................................................................... 7
2.1. Qrxlevmin ............................................................................................................ 7 2.2. Qrxlevminoffset ................................................................................................. 7 2.3. cellReselectionPriority .................................................................................. 10 2.4. TreselectionEUTRA ........................................................................................ 10 2.5. TreselectionCDMA_HRPD ............................................................................. 11 2.6. Qhyst .................................................................................................................. 12 2.7. Qoffset ............................................................................................................... 13 2.8. SIntraSearch ..................................................................................................... 14 2.9. SnonIntraSearch ............................................................................................. 14 2.10. threshX-High .................................................................................................... 15 2.11. threshX-Low ..................................................................................................... 16 2.12. ThreshServing-LowP ..................................................................................... 17 2.13. Cdma2000HrpdThreshXLow ........................................................................ 18 3. 网内切换测量参数 ............................................................................................................. 18
3.1. A1事件测量参数 ............................................................................................... 18
3.1.1 a1-ThresholdRsrp ......................................................................................... 19 3.1.2 hysteresisA1 ................................................................................................. 20 3.1.3 timeToTriggerA1 ........................................................................................... 20 3.1.4 triggerQuantityA1 ........................................................................................ 21 3.2. A2异频测量参数 ............................................................................................... 22
3.2.1 a2-ThresholdRsrp ......................................................................................... 22 3.2.2 hysteresisA2 ................................................................................................. 23 3.2.3 timeToTriggerA2 ........................................................................................... 24 3.2.4 triggerQuantityA2 ........................................................................................ 25 3.3. A3事件测量参数 ............................................................................................... 26
3.3.1 filterCoefficientEUtraRsrp ............................................................................ 26 3.3.2 a3-Offset ...................................................................................................... 27 3.3.3 hysteresisA3 ................................................................................................. 28 3.3.4 timeToTriggerA3 ........................................................................................... 29 3.3.5 cellIndividualOffsetEUtran（Ocn） ............................................................. 30 3.3.6 triggerQuantityA3 ........................................................................................ 31 3.3.7 reportIntervalA3 .......................................................................................... 31 3.3.8 reportAmountA3 .......................................................................................... 32 3.3.9 maxReportCellsA3 ........................................................................................ 33 3.4. 系统内测量其他参数 ......................................................................................... 34
3.4.1 s-Measure .................................................................................................... 34
-1-
3.4.2
Gapoffset ..................................................................................................... 34
3.4.3 系统内测量共性参数 ................................................................................. 36
4. 异系统切换测量参数（EVDO） ...................................................................................... 37
4.1. B2事件测量参数 ............................................................................................... 37
4.1.1 b2-Threshold1 .............................................................................................. 37 4.1.2 b2-Threshold2CDMA2000 ........................................................................... 38 4.1.3 hysteresisB2 ................................................................................................. 39 4.1.4 timeToTriggerB2 ........................................................................................... 39
4.2.
A2异系统测量参数 ........................................................................................... 40 4.2.1 a2-ThresholdRsrp ......................................................................................... 40 4.2.2 hysteresisA2 ................................................................................................. 41 4.2.3 timeToTriggerA2 ........................................................................................... 42 4.2.4 triggerQuantityA2 ........................................................................................ 43
5. 功率控制参数 ..................................................................................................................... 43 5.1. p0-NominalPUCCH ......................................................................................... 43 5.2. p0-NominalPUSCH .......................................................................................... 44 5.3. deltaPreambleMsg3 ........................................................................................ 45 6. 接入参数 ............................................................................................................................. 46 6.1. preambleInitialReceivedTargetPower ........................................................ 46 6.2. maxHARQ-Msg3Tx ......................................................................................... 47 6.3. powerRampingStep ........................................................................................ 47 6.4. preambleTransMax ......................................................................................... 48 6.5. sizeOfRA-PreamblesGroupA ....................................................................... 49 6.6. messageSizeGroupA ..................................................................................... 50 6.7. mac-ContentionResolutionTimer ................................................................ 51 6.8. ra-ResponseWindowSize .............................................................................. 51 6.9. phich-Resource ............................................................................................... 52 7. 寻呼参数 ............................................................................................................................. 53 7.1. defaultPagingCycle ........................................................................................ 53 7.2. nB ........................................................................................................................ 54 8. 无线链路故障监视 ............................................................................................................. 55
-2-
1. 小区属性参数
1.1. referenceSignalPower
中文名称：小区RS信号功率 参数重要性：高
引用规范：3GPP TS 36.331 功能描述：RS资源块的发射功率。 影响范围：Eutrancell 数据类型：Long 取值范围：详见下表 单位：详见下表
建议值：16.4dBm（40W），13.4dBm（20W）
调整原则：该参数决定了小区的覆盖范围，可优化调整，一般设置考虑各个RE的功率比较平均，和功放和带宽有关。假设功放20W带宽20M，PB=1，RS的功率=43-10log(1200)+10log（PB+1）=15.2dBm。
位置：无线参数/LTE FDD/资源接口配置/基带资源/基带资源参考信号功率（dBm） 具体参数如下： 参数名 英文名 中兴 小区RS信号功率 cellReferenceSignalPower 阿朗 参考信号功率 华为 参考信号功率 referenceSignalPower ReferenceSignalPwr -60~50 13.4（20W,15M） dBm -600~500 134（20W,15M） 0.1dBm 取值范围 [-60..50] 厂商建议配置值 单位 13.4（20W,15M） dBm 1.2. cellIndividualOffset(Ocs)
中文名称：小区切换偏置 参数重要性：高
引用规范：3GPP TS 36.331
功能描述：设置A3服务小区同频切换边界。 影响范围：Eutrancell 数据类型：Long
-3-