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NOKIANOKIA诺基亚异频负载均衡报告诺基亚异频负载均衡报告诺基亚北京项目LTE优化组2016年3月NOKIANOKIA诺基亚异频负载均衡报告目录TOC\o"1-5"\h\z\o"CurrentDocument".背景 3\o"CurrentDocument".负载均衡功能测试 4\o"CurrentDocument"异厂家负载均衡功能测试 4\o"CurrentDocument"参数设置 4\o"CurrentDocument"实验效果 6\o"CurrentDocument"同厂家同站双载波负载均衡功能测试 8\o"CurrentDocument"参数设置 9\o"CurrentDocument"实验效果 10\o"CurrentDocument"3.遗留问题 13NOKIANOKIA诺基亚异频负载均衡报告.背景在LTE中,由于小区半径的减少,用户分布不均匀的现象十分严重,经常会出现某个小区负载较重而其邻居负载较低的现象,不仅会降低网络容量而且还会影响到用户的服务质量。上述原因直接促使了负载均衡技术的诞生,在保证用户的服务质量的同时,使网络总容量达到最大化。目前所支持的负载均衡功能如下:iFLB:InterFrequencyLoadBalance异频负载平衡当高负荷小区的负荷超过HighLoad门限后进入iFLB激活状态,并可以触发LB切换,直到小区负荷低于Targetload门限,则退出iFLB激活状态;在iFLB激活状态期间,ENB间的负荷信息不通过X2接口进行交互,所以这种状态下触发的LB切换属于邻区负荷未知的盲切换,只要目标邻区的下行rsrp大于设定的LNHOIF:thresholdRsrpIFLBFilter参数门限就会触发。而当切换请求消息(HandoverRequestCause:ReduceLoadinServingCell)发送给异频的目标邻区时如果邻区负荷已经超过了自己小区设置的TargetLoad门限的话,邻区会拒绝该切换请求。AMLE:ActiveModeLoadEqualization主动模式负载均衡小区开通AMLE功能后,当小区的负荷门限高于HighLoad的时候,小区会触发和异频邻区的负荷信息交换,它通过X2连接获取邻区的CAC信息(即邻区的综合可用容量),当主小区和异频邻区负荷满足如下条件时触发AMLE的LB切换:当邻区可用容量与本小区的可用容量差值大于设定参数门限AMLEPR:deltaCac时则触发LB的切换主小区的可用容量<AMLEPR:maxCacThreshold邻区的可用容量>=AMLEPR:cacHeadroomUE检测到的目标邻区的下行rsrp大于设定的LNHOIF:thresholdRsrpIFLBFilter参数门限iFLB与AMLE的区别:iFLBAMLE当小区达到高负载门限时,iFLB提供负载均衡AMLE将小区与配对邻区的负载差异控制在所设的负载差值以内iFLB的目的是把小区的负载控制在所设的负载门限下,而不是平衡小区间的负载候选邻区的筛选过程类似iFLB负载的信息只在同个eNB的小区间分享;对于不同eNB小区使用的是盲切换,不根据邻区的负载情况来判断小区间使用资源状态报告(RSR)来分享负载情况,不使用盲切换,对于没有RSR的邻区将不会被切换3

NOKIA2.NOKIA2.负载均衡功能测试诺基亚异频负载均衡报告异厂家负载均衡功能测试为进行Nokia和HWLTE基站间负载均衡的实验,选定实验点为首都机场T1出发厅。如下图所示,涉及到的Nokia小区为朝阳机场T1F2至F3层公共区NLM(ENBID:76309),涉及到的HW基站为顺义首都机场T1航站楼F2F3东侧办公餐饮区及出港大厅HLM499769-132。F2-T1航站楼各小区覆盖范围及路测平均RSRPF2层CELL6小区名为顺义首都机场F2层CELL6小区名为顺义首都机场T1航站楼F1F2西西区果萧T1肮站楼FZ面皆区.平均RSRP^MdbmF2层CELL8小区名为顺义首都机场T1耻站搂门“四健办公辍庆区HL摘句31,覆盖T1版站楼F2西利办必蜜饮区.平均RSRP为-70dBmF2Jg亡ELL7小区名为独立首部机场丁1航站楼FlF2到达大厅股东建区HLM-132,馥盖T1航站楼F2东营区,平玷RSRP为F2层CELLS小区名为顺兄首都机场T1航站楼F2F3东恻办公餐饮区及出港大厅HLM-131,覆盛T1航站楼F2东加办公餐饮区.平均RSRP^r-70dbiriF2层CELL10小区包为期义首都机场TI航站楼F2F3东创办公鲁伏区及出港大厅HUVM32,技盖T1航站楼救出港大厅,平均R3RF为用3dbmHUAW€IHUAW€IHUAWQTECHNOLOGIESCO.,LTD.参数设置开启featureLTE1531:Inter-frequencyLoadBalancingExtension(开启iFLB)ParameterNameParameterFullNameMOC默认值修改值03019:06~13:00修改值0226-210:45~11:30修改值0226-110:00〜10:30actInterFreqLBActivationofinterfrequencyloadbalancing(iFLB)LNBTSfalseTRUETRUETRUEthresholdRsrpIFLBFilterInter-FrequencyLBThresholdforRSRPTargetFilterLNHOIF-98-95-95-95thresholdRsrqlFLBFilterInter-FrequencyLBThresholdforRSRQTargetFilterLNHOIF-12-12-12-12targetLoadGbrDIDLGBRresourcetargetloadLNCEL505050504

NOKIA诺基亚异频负载均衡报告NOKIAtargetLoadNonGbrDlDLnon-GBRresourcetargetloadLNCEL75755%8%targetLoadPdcchPDCCHtargetloadLNCEL503%50%5%iFLBHighLoadGBRDLInter-FrequencyLoadBalancingDLGBRHighLoadLNCEL60606060iFLBHighLoadNonGBRDLInter-FrequencyLoadBalancingDLnon-GBRHighLoadLNCEL85858%10%iFLBHighLoadPdcchInter-FreqLoadBalancingPDCCHHighLoadLNCEL805%80%7%nomNumPrbNonGbrNominalnumberofPRBsforloadbalancingLNCEL1101010iFLBBearCheckTimerInter-FrequencyLoadBalancingQCI1BearerCheckTimerLNCEL12121212prohibitLBHOTimerProhibitLoadBasedHandoverTimerLNCEL10101010iFLBRetryTimerInterFreqLoadBalRetryTimerLNCEL60606060开启featureLTE1841:Inter-FrequencyLoadEqualization(开启AMLE)MOClassParameterNameParameterFullName默认值修改值3月1日16:39:00LNBTSactIfHoEnableinterFrequencyhandoverenabledenabledLNBTSactAmleActivateactivemodeloadequalizationfalseTRUELNBTSactInterFreqLBActivationofinterfrequencyloadbalancing(iFLB)falseTRUELNBTSprohibitLBHOTimerProhibitLoadbasedhandovertimer1010LNRELamleAllowedActivemodeloadequalizationallowedfalseTRUELNRELremoveAllowedRemoveallowedtrueFALSELNHOIFthresholdRsrpIFLBFilterInter-freqloadbalthresholdforRSRPtargetfilter-98-95LNHOIFthresholdRsrqIFLBFilterInter-freqloadbalthresholdforRSRQtargetfilter-12不设置LNCELcellResourceSharingModeCellresourcesharingmodenonenoneLNCELthreshold2InterFreqThresholdth2interFreqforRSRP-100-90LNCELthreshold2aThresholdth2aforRSRP-96-87LNCELiFLBRetryTimerInterFreqLoadBalRetryTimer6060sLNCELiFLBHighLoadGBRDLInter-frequencyloadbalancingGBRhighloadDL6060%LNCELiFLBHighLoadNonGBRDLInter-frequencyloadbalancingnon-GBRhighloadDL858%

NOKIA诺基亚异频负载均衡报告NOKIALNCELiFLBHighLoadPdcchInter-frequencyloadbalancingPDCCHhighload8080%LNCELiFLBBearCheckTimerInter-frequencyloadbalancingQCI1Bearerchecktimer1212sLNCELcellCapClassCellcapacityclassvalue100100LNCELtargetLoadGbrDlDLGBRresourcetargetload5050%LNCELtargetLoadNonGbrDlDLnon-GBRresourcetargetload755%LNCELtargetLoadPdcchPDCCHtargetload5050%LNCELmlbEicicOperModeModeforcalculatingtheCACinloadbal.andeICICallUesallUesLNCELnomNumPrbNonGbrNominalnumberofPRBsforloadbalancing110LNCELulStaticCacStaticCACforuplink100100LNCELulCacSelectionUplinkCACsourceselectionulReflectDlCaculReflectDlCacLNCEL-AMLEPRamlePrIdamlePrId0/10LNCEL-AMLEPRdeltaCacDifferenceinCACofsourceandtargetcells205%LNCEL-AMLEPRcacHeadroomHeadroominCAC00LNCEL-AMLEPRtargetCarrierFreqTargetcarrierfrequency39148LNCEL-AMLEPRmaxCacThresholdThresholdformaximumCAC1001002.1.2实验效果开启featureLTE1531:Inter-frequencyLoadBalancingExtension(开启iFLB)开启featureLTE1531后,指标统计Nokia76309-1和HW499769-132基于iFLB的LBHO全部成功,信令显示触发原因为reduce-load-in-serving-cell,符合预期。SDATETIMEENB_CELLHO_LB_ATTHO_LB_SUCCHIGH_CELL_LOAD_LB20160226100076309-1111820160226101576309-1442520160226103076309-1773220160226104576309-128289120160226110076309-1331620160226111576309-1111120160226113076309-1332520160301094576309_13328

20160301100076309_1434321520160301101576309_1886220160301103076309_100420160301104576309_1111420160301110076309_1872220160301111576309_1514414620160301113076309_120168020160301114576309_116157120160301120076309_1211020160301121576309_1524017020160301123076309_1773320160301124576309_120176220160301130076309_12113诺基亚异频负载均衡报告NOKIAEFX^1EB13?7£■jiflCCPvalue e Iig]nbi.L-EM3-]Ii]NOKIAEFX^1EB13?7£■jiflCCPvalue e Iig]nbi.L-EM3-]Ii]WDUdJEniity'?■K0AU1, =|ms.-acKFcCHB-TD।I'?aHLQK 骑京欣十已帮克4收州”h jaJ.B=Evd-UJEF即支电!«!FlO0-HrsAE"laA£':开启featureLTE1841:Inter-FrequencyLoadEqualization(开启AMLE)开启featureLTE1841后,指标统计LBHO有尝试计数,信令显示触发原因也为reduce-load-in-serving-cell,但同时也开启了iFLB,为了区分LB基于具体£02可©抓取wireshark,Nokia小区有发起资源请求,但未出现厂家间资源信息交互。SDATETIMEENB_CELLHO_LB_ATTHO_LB_SUCCHIGH_CELL_LOAD_LB20160301160076309_100020160301161576309_100020160301163076309_14736156201603011645763091554622920160301170076309_100020160301171576309_100076309向HW小区发起的资源请求消息类型为CompositeAvailableCapacityPeriodic,周期性综合可用容量。lE/GroupPresRaIEtypeSemanticsdescriptionCritiAssigned7

NOKIA诺基亚异频负载均衡报告NOKIANameencengeandreferencecalityCriticalityReportCharacteristicsOBITSTRING(SIZE(32))EachpositioninthebitmapindicatesmeasurementobjecttheeNB2isrequestedtoreport.FirstBit=PRBPeriodic,SecondBit=TNLloadIndPeriodic,ThirdBit=HWLoadIndPeriodic,FourthBit=CompositeAvailableCapacityPeriodic.Bits5to32shallbeignoredbytheeNB2YESreject皿TineSouroe325K还工记皿TineSouroe325K还工记*3wosi'iiaio3Z5®.牛冲iOilJMOOT10:M31W.716,215 x2af ISA1d-rLFind1cation3ZCM狂当瑞1QQ口C-.21132667m,3ZCM狂当瑞1QQ口C-.21132667m,67277^iaDrai;22s5.30G72g1£1AQ.Si.224.2^我整93^.87165.1150,716,2151331M-JL4.IS5<2LQO.T1,C.21>33109114-0fl5&411OD-91-220.ID33110H.4.GGGOd.1.140.91.224.2033111.314.GGQ25.7LOO.71.e.21S33123-114.100,?ln22C.2033124114.T3U7C1OQ,gi,220.20331X1H4-IH1H77lO(k71-E.ZLS33A54124.asa&SOWO.91.224.20rs上*Min 箱TGC?+MF1IDD./l.b.Jib-lM.7i.fi.215-IM,91220.20100.91.220.2QlOD-Zl.G.JllUH.71.G.215lM.fili_2M.2flIQQ.TliQiZll100.QI.220.2010O.71.G.2157PAP廿质IPAPAPTP质小亦一幺心攵X2攵短短攵短文幺丁1d-rtag>x«=ScatvwepQrc1nginig»f!on]UEK 11d-r-E^curcti5caTu5H.-&parc1号mntidadort5ACK1d-hanctaverPrepar-atinn^MterinFnrrtatlonBlockSyjterinFcrnat1nnBloc.kTyvelSIB-2SACK1d-lundc^arprAparir1onrajccotiiiaceIomccanrigwjn1ansackId-snscaituSTr-^n-sifap双Kid-UEContexcRelewcHE4RTMATE)icflft2jId-RAparTChiraccar1st1csProtoc-olIE-Fieldid;id-RepcrtChwaccer1stics(3H)criticjlity:rejact(D-)ft«porc£har>€T«r1scTi:5^lOUCOGOO[bicIdngfth32,OtiDLOXiDDOWOOGCi(X>000000OCOOOQGQ udlwfr2£^3134&6]ft«porc£har>€T«r1scTi:5^lOUCOGOO[bicIdngfth32,OtiDLOXiDDOWOOGCi(X>000000OCOOOQGQ udlwfr2£^3134&6]SIce«=J:■id-CellTofl.-EpcirtnPrococollE-FieldId.1d-€ftllrafl.4parc(2flJCrlTltallEy!IgrNU{1)日丫诺1疣旧CeliTgReport-List;11t«i二t”0;id-C-el1ToRfDOrt-Tri-rFmewu*ce.有5加工RiFmewu*ce.有5加工Ri方^&:笈:京6:M3ZM130B4CM1Z5IDO.n.6.Z11花力抬”却IDO.?i.6.21S3266730a.S727741H.fl.22D.2032frM-309ftTZtlB1M.191Z2D.203Z<-91309-471t511W.iTL.C.211331O£3U.6MJ3A1CO.71.G.215-331W311,665^13100.a220.20那11。314,«K111W.91ZZD.2C□MlC-1商:五5:元屋100.91.22Q.ZQ1.00.di.224.2dIM.71,JISLOT.71.C.215LDd.91.220BEULOO.SI.224.20100.71.^,215LW.7114.213Li*»gihI而«2114融90tz一FKFKFK曳d-*cd-wd-l<:^■--1515iIE-461d-Kurxl口金匚ionNascfrsnrarriSiTioaElocks^EUoiK而口「1金£icralackiypfilsiE-J!625Kte2W3id-hmdaverpreparacionRK<«mecticrfteccnFionpratocallCs:3icarsIl-tfli0:1d-EIMEl-IM«ii^urAfAnt-1E(3ProtacclTE-FieldId;id-€i«Bl-^e*jurewnt-:D-(39JerlElcallryii/]础匚(OJ日VJliid网enmv■"七z「£T。;355QIitn1;id-E«BZ-Nc4Jurerent-ID-日Pforaca'IiE.-rialdId:1tJ-tMn2-w™urerem-i&d缶criticiHty;reject{O:3valuaNtiasur-tfAnc-iaj1It«i2;id-Cjiuse二FrcftacollE-Fieldid!1d-c>U£fi£5]cr1E-lcjkUry:1aoi"□(i)BybIueiQHiaiZftfrh.mm±w*iwnc-T*rtpa「ar1-iQHiaiZftfrh.mm±w*iwnc-T*rtpa「ar1同厂家同站双载波负载均衡功能测试为进行Nokia同站内各载波间负载均衡的实验,选定实验点为76413朝阳机场2号

NOKIA诺基亚异频负载均衡报告NOKIA航站楼出发厅南侧NLM,该站点两个载波业务量和用户数分布不均。2.1.3参数设置开启featureLTE1841:Inter-FrequencyLoadEqualization(开启AMLE)MOClassParameterNameParameterFullName默认值修改值3.210:00LNBTSactIfHoEnableinterFrequencyhandoverenabledenabledLNBTSactAmleActivateactivemodeloadequalizationFALSETRUELNBTSactInterFreqLBActivationofinterfrequencyloadbalancing(iFLB)FALSEFALSELNBTSprohibitLBHOTimerProhibitLoadbasedhandovertimer1010LNRELamleAllowedActivemodeloadequalizationallowedFALSETRUELNRELremoveAllowedRemoveallowedTRUEFALSELNHOIFthresholdRsrpIFLBFilterInter-freqloadbalthresholdforRSRPtargetfilter-98-90LNHOIFthresholdRsrqIFLBFilterInter-freqloadbalthresholdforRSRQtargetfilter-12不设置LNCELcellResourceSharingModeCellresourcesharingmodenonenoneLNCELthreshold2InterFreqThresholdth2interFreqforRSRP-100-90LNCELthreshold2aThresholdth2aforRSRP-96-87LNCELiFLBRetryTimerInterFreqLoadBalRetryTimer6060sLNCELiFLBHighLoadGBRDLInter-frequencyloadbalancingGBRhighloadDL6060%LNCELiFLBHighLoadNonGBRDLInter-frequencyloadbalancingnon-GBRhighloadDL858%LNCELiFLBHighLoadPdcchInter-frequencyloadbalancingPDCCHhighload8080%LNCELiFLBBearCheckTimerInter-frequencyloadbalancingQCI1Bearerchecktimer1212sLNCELcellCapClassCellcapacityclassvalue100100LNCELtargetLoadGbrDlDLGBRresourcetargetload5050%LNCELtargetLoadNonGbrDlDLnon-GBRresourcetargetload755%LNCELtargetLoadPdcchPDCCHtargetload5050%LNCELmlbEicicOperModeModeforcalculatingtheCACinloadbal.andeICICallUesallUesLNCELnomNumPrbNonGbrNominalnumberofPRBsforloadbalancing110LNCELulStaticCacStaticCACforuplink100100LNCELulCacSelectionUplinkCACsourceselectionulReflectDlCaculReflectDlCac

NOKIA诺基亚异频负载均衡报告LNCEL-AMLEPRLNCEL-AMLEPRLNCEL-AMLEPRamlePrIdamlePrId0/1NOKIA诺基亚异频负载均衡报告LNCEL-AMLEPRLNCEL-AMLEPRLNCEL-AMLEPRamlePrIdamlePrId0/1deltaCaccacHeadroomDifferenceinCACofsourceandtargetcellsHeadroominCAC20 5%39148100 100LNCEL-AML39148100 100targetCarrierFreqTargetcarrierfrequencyEPRLNCEL-AMLmaxCacThresholdThresholdformaximumCACEPR2.1.4实验效果修改后76413两载波用户数实现均衡,1小区用户数下降,PRB利用率下降,同时11小区用户数增加,PRB利用率有所上升。由于是站内切换无明显log显示LBHO,但切换事件均为LB切换的所用事件A4,符合预期。RRC最大连接数60illliILjlil匕iiLiitLuiiiniiiiiniiiiirTrHiiiiiiniiiiiiiiniiiiiiiiiiiiiiiiiiiiiii60illliILjlil匕iiLiitLuiiiniiiiiniiiiirTrHiiiiiiniiiiiiiiniiiiiiiiiiiiiiiiiiiiiii.Illi.■高而皿聊删删*话记1E>百0EQOWIm/EJSfmSLHI2首名苍SISEJgTQmQE导I啻DE昱3箕式善芮E2痣SSQOmIm/EJ9T"另与msgrnmQ9EISEJSTOEQO-IT;道nmQEOI&用.sQRQIEFE@3QE占E/V9HOE〔E而dQEQnwjEmg息另KMmfgTUESEfgHoE寻9E遗自E。0汨E/maTOE另5E曰9T0E后5MEfgsEQmWEfgToE00)Mglom另EsmfgTOE。□防E正菖EQrr而E裔fgiDEOREERgTDc-J寻I巴里号g。0二祭百OEs三doEQnoaEfgTCIE2日上行PRB利用率 2日上行PRB利用率 -日上行prr利用率10■76413-1RRC:连接最大蓟 ・7E&E三-1ERR匚连接最大效76413-1PRB利用率25.(y^5.00^NOKIA76413-11PRB利用率30.0TO工工0■格玷川电四ECLG联5m0.00^T・2NOKIA76413-11PRB利用率30.0TO工工0■格玷川电四ECLG联5m0.00^T・2日上fjPRB利月窣 工日上行PR3利用率7641m上行PRB利用率 TR1*1九弓上日上行PH8利用率 花41基13月1三上行PRE利用率-7&41%113月正上行F租利用率76413-11J.R1E±行FRB和用率76413下行PRB利用率诺基亚异频负载均衡报告 7641m目33二行PRB利用率 7&4131三m1E下行P阳利用军-7641111m月之E下厅PNB和用率TM13-U三目1三二行PRB利用率11诺基亚异频负载均衡报告NOKIA诺基亚异频负载均衡报告SDATETIMEENB_CELLHO_LB_ATTHO_LB_SUCCHIGH_CELL_LOAD_LB20160302080076413_100020160302081576413_100020160302083076413_100020160302084576413_100020160302090076413_100020160302091576413_100020160302093076413_100020160302094576413_100020160302100076413_1138137020160302101576413_1120118020160302103076413_1172169020160302104576413_1237237020160302110076413_1243240020160302111576413_1264262020160302113076413_1210205020160302114576413_1207203020160302120076413_1146142020160302121576413_1140139020160302123076413_1156154020160302124576413_1230228020160302130076413_1197196020160302131576413_1219211020160302133076413_1216215020160302134576413_1222218020160302140076413_1168165020160302141576413_1171168020160302143076413_1125122020160302144576413_1162161012

NOKIA诺基亚异频负载均衡报告NOKIA20160302150076413_1217214020160302151576413_1233231020160302153076413_1251245020160302154576413_1251240020160302160076413_1258251020160302161576413_1285281020160302163076413_1214213020160302164576413_1293289020160302170076413125224802.3空闲态负载均衡2.1.5参数设置参数名参数全称级别默认值3月15日14:213月15日12:163月15日9:16actIdleLBActivationofidlemodeloadbalancing(IdleLB)LNBTSFALSETRUETRUETRUEidleLBCapThreshIdlemode10adbalancingcapacitythresholdLNCEL100100100100idleLBPercentageOfUesPercentageofUEforidlemodeloadbalancingLNCEL070%70%90%idleLBCelResWeightCellreselectionweightfactoridlemodeloadbalancingLNCEL空空空空idleLBEutCelResWeightEUTRAcarrierweightfactoridlemodeloadbalancingIRFIM空10070702.1.6实验效果2个载波用户数相当,实现均衡。PERIOD_START_TIMEenb_lcr76413-1CELL_LOAD_ACT_UE_MAXenb_lcr76413-11CELL_LOAD_ACT_UE_MAX2016/3/159:0076413-14176413-11382016/3/159:1576413-14376413-11392016/3/159:3076413-13876413-11352016/3/159:4576413-14076413-11372016/3/1510:0076413-14276413-11402016/3/1510:1576413-14076413-11392016/3/1510:3076413-13676413-11352016/3/1510:4576413-14176413-11352016/3/1511:0076413-14476413-113613

NOKIA诺基亚异频负

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