無線第2部分-td lte網(wǎng)絡優(yōu)化設計

LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page1網(wǎng)絡規(guī)劃？優(yōu)化LTE的干擾控

各干擾

LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page2網(wǎng)絡規(guī)劃？優(yōu)化LTE的干擾控

各干擾

LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page3LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page4干擾的類小區(qū)小區(qū)同站小區(qū)不同站小區(qū)LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page5系統(tǒng)內(nèi)小區(qū)內(nèi)干?PDSCH和PUSCH通過調(diào)度讓不同UE使用不同的PRB實現(xiàn)互不干PUCCH的存在碼分復PRACH會存在一

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LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page6系統(tǒng)內(nèi)小區(qū)間干???LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page7系統(tǒng)外上行干LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page8TD-LTE網(wǎng)絡中如何表征干ReferenceReferenceSignalReceivedQuality(RSRQ)isdefinedastheratioN×RSRP/(E-UTRARSSI),whereNisthenumberofRB’softheE-UTRAcarrierRSSImeasurementbandwidth.ThemeasurementsinthenumeratoranddenominatorshallbemadeoverthesamesetofresourceE-UTRACarrierReceivedSignalStrengthIndicator(RSSI),comprisesthelinearaverageofthetotalreceivedpower(in[W])observedonlyinOFDMsymbolscontainingreferencesymbolsforantennaport0,inthemeasurementbandwidth,overNnumberofresourceblocksbytheUEfromallsources,includingco-channelservingandnon-servingcells,adjacentchannelinterference,thermalnoiseetc.ThereferencepointfortheRSRQshallbetheantennaconnectoroftheIfreceiverdiversityisinusebytheUE,thereportedvalueshallnotbelowerthanthecorrespondingRSRQofanyoftheindividualdiversitybranches.??Thermal

Basedonanunrestrictedobservationintervalintimeandfrequency,theUEshallderiveforeachCQIvaluereportedinuplinksubframenthehighestCQIindexbetween1and15inTable7.2.3-1whichsatisfiesthefollowingcondition,orCQIindex0ifCQIindex1doesnotsatisfythecondition:nPRB0,...,NUL1asdefinedinTS36.211[3].ThereferencepointforthemeasurementbetheRXnPRB0,...,NUL1asdefinedinTS36.211[3].ThereferencepointforthemeasurementbetheRXantennaconnector.Incaseofreceiverdiversity,thereportedvalueshallbelinearaverageofthepowerinthediversitybranches.shallcontainasetofReceivedInterferencePowersofphysicalresourceblock’sbandwidthofNRBresourceelementsasdefinedinTS36.211[3].ThereportedTheuplinkreceivedinterferencepower,includingthermalnoise,withinonephysicalblocksasdefinedin[3].Itisdefinedas(NoxW),whereNodenotesthewhitenoiseTheuplinkthermalnoisepowerwithintheULsystembandwidthconsistingofNUL systembandwidth.ThemeasurementisoptionallyreportedtogetherwiththeReceivedInterferencePowermeasurement,itshallbedeterminedoverthesametimeperiodastheReceivedInterferencePowermeasurement,ThereferencepointforthemeasurementshallbetheRXantennaconnector.Incaseofreceiverdiversity,thereportedvalueshallbe systembandwidth.ThemeasurementisoptionallyreportedtogetherwiththeReceivedInterferencePowermeasurement,itshallbedeterminedoverthesametimeperiodastheReceivedInterferencePowermeasurement,ThereferencepointforthemeasurementshallbetheRXantennaconnector.Incaseofreceiverdiversity,thereportedvalueshallbelinearaverageofthepowerinthediversitybranches.spectraldensityontheuplinkcarrierfrequencyandWNULNRBfdenotestheCRSCRSSINRTD-LTE網(wǎng)絡中所有小區(qū)在時域同

Ncellmodvshiftvshift LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page10SINR和吞吐?

PDSCHThroughputvs.eva70/2x2MIMO

?SINR是影響吞吐量的最大因素， ?SINR=12dB時的吞吐量只有

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SINR

LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page11CRSSINR和吞吐CRSSINR不一定能代表PDSCH的?但是由于干擾小區(qū)的Loading低，PDSCH的SINR卻可能會00 ?所有小區(qū)在一定Loading下的CRS-SINR才能更好地反映PDSCH的在優(yōu)化時，網(wǎng)絡最好進行一定的加載，如50％LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page12PDSCH被相鄰小區(qū)的CRS干?同站小區(qū)開啟時可以導致Throughput明顯下–當CFI＝3時，120PDSCHREs/RB,12PDSCHRes/RB 覆蓋降低這種干擾的影AVGMAXMINLTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page13鄰區(qū)CRS受到服務小區(qū)的干當PCI模3鄰區(qū)的CRS將受到服務小區(qū)CRS持續(xù)的干當PCI模3鄰區(qū)的CRS將收到服務小區(qū)PDSCH服務小區(qū)的Loading將影響到鄰區(qū)的CRSSINR和因此，應該盡量在更需要切換的地方避免PCI模3相LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page14降低干擾影響的方法總?從前面的討論可用看出，這種同頻干擾與LTE技術與生俱來的，是無完全避免的，但可以優(yōu)化以降低 影響?方法1：通過網(wǎng)規(guī)網(wǎng)優(yōu)來控制干?如調(diào)整天線來減 覆?如調(diào)整天線將大部分話務放置在小區(qū)內(nèi)SINR優(yōu)化PCI模3問題?將 放置在對切換不敏感的地?方法2：通過產(chǎn)品功能來控制干?方法LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page15干擾協(xié)調(diào)減輕UE間PDSCH干???

fading,user#1fading,user#2User#1User#2LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page16與干擾相關的TD-LTE優(yōu)化案PCI模LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page17干擾控制優(yōu)化前小區(qū)名下傾角世紀海豐地豐 LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page18干擾控制優(yōu)化后小區(qū)名下傾角世紀海豐地豐 LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page19PCI優(yōu)化案?PCI=3*SSS+?兩個小區(qū)的PCI如果模Step4:addStep4:add20dBattenuationofcellStep5:reduceStep5:reduce30dBattenuationofcellStep3:KeepUEattachtoStep3:KeepUEattachtocell2,enableCell1-5Step4:add20dBattenuationofcell-

PCI是LTE同頻組網(wǎng)的唯一標2cellsinsameeNB,nodataserviceisrunningduring2cellsinsameeNB,nodataserviceisrunningduringCell31andCell61,SIMO,HighRSRPCase(PCIMod3areStep3:KeepUEattachtocell2,enableCell1-402cellsinsameeNB,nodataserviceisrunningduringCell31andCell61,SIMO,HighRSRPCase(PCIMod3areTestServingStep1:Cell1enabledonly,UEattachtocell-55-Step2:DisableCell1.Cell2enabledonly,UEattachtocell-55-Step3:KeepUEattachtocell2,enableCell1 --4Step4:add20dBattenuationofcell-55-Step5:reduce30dBattenuationofcell0Step6:disablecell-55-2Cell31andCell33,SIMO,HighRSRPCase(PCIMod3areTestServingStep1:Cell1enabledonly,UEattachtocell-55-Step2:DisableCell1.Cell2enabledonly,UEattachtocell-55-Step3:KeepUEattachtocell2,enableCell1-55-5Step4:add20dBattenuationofcell-55-Step5:reduce30dBattenuationofcell-55-9Step6:disablecell-55-Cell31andCell33,SIMO,HighRSRPCase(PCIMod3areStep5:reduce30dBattenuationofcell-9LTEdesignandCell31andCell33,SIMO,HighRSRPCase(PCIMod3areStep5:reduce30dBattenuationofcell-9單小區(qū)覆蓋測試@深 -上下行2：2配-周邊站點空-市民南E1PCI優(yōu)化前-市民南E1PCI優(yōu)化后LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page21PCI優(yōu)化案例SINR提

段的SINR水平有小區(qū)名Mode小區(qū)小區(qū)名Mode小區(qū)Mode大東方00大東方00小紹興0小紹興2官廳小區(qū)0官廳小區(qū)1LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page22PCI模3優(yōu)化和PCI規(guī)劃設PCI模3將導致SINR始終處 的情形，且和系統(tǒng)負載不相關；這將導致匯報的CQI不能真實反映當時的將引起UE對RSRP的測 、測 確、測量時間偏長；進而可延誤切換的時機而導致掉PCI模3嚴格避免主同步信道相同的小區(qū)天線方向相互對同組的輔同步信道也應盡量避免天線方向相互對?PCI模3相等問題在網(wǎng)絡中不模3相等的小區(qū)邊界放在 將比其他地方 更重要?網(wǎng)絡規(guī)劃設計工具將能夠更好地設計PCI，使整個網(wǎng)絡的性能更LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page23沒收到RRCCONNPCI210rsrp-89,rsrq-PCI382rsrp-83,rsrq-Didn’treceiveRRCreconfigurationrequestafter9secondsSRMAXpoorSR

PCI210rsrp-99,rsrq-PCI382rsrp-77,rsrq-LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page24沒收到RRCCONN綜合UELog和EnbTrace，可以看到Enb在收到測量報告后6MRsentfor159.NoresponsereceivedbyUEduetolowCallduetoSRPCIPCIPCIPCIBLERBLERsuddenlyLTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page25沒收到RRCCONN小區(qū)邊界，無線信道質(zhì)UE發(fā)送MR，但是沒有收到切換即使服務小區(qū)的無線信道質(zhì)量越來越差，UE也只能呆在這個小區(qū)UE由于達到SR的最大值或檢測到鏈路失敗重新發(fā)起隨機 核查UE性針對有快 LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page26減少系統(tǒng)內(nèi)干擾的主要優(yōu)化方 根據(jù)環(huán)境情況設計站調(diào)整方向角，下傾LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page27LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page28TD-LTE無線網(wǎng)絡設計流客戶客戶需規(guī)劃其他行規(guī)劃其他行規(guī)劃驗收建合合同簽初始優(yōu)地初始優(yōu)試無線參

正初初始規(guī)劃計PCIPCI站址最終規(guī)站址案LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page29TD-LTE規(guī)劃目覆蓋性覆提升RSRP,以達覆理想覆容

質(zhì)量性頻干擾,提高頻譜利用率,保證體現(xiàn)

精品LTE網(wǎng)用戶滿意規(guī)劃是前提，結構是統(tǒng)籌，規(guī)則LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page30覆蓋和質(zhì)量并??RSRP≥-100dBm,在主要城區(qū) 50%加載3dB?精品網(wǎng)絡,還需要考慮SINR的分布,比如-≥5dB60%;≥15dB15%;≥(外場測試,SINR分級標準,極好 >20dB好:15--35

5-15LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page31TD-LTE無線網(wǎng)絡設計流客戶客戶需規(guī)劃其他行規(guī)劃其他行規(guī)劃驗收建合合同簽初始優(yōu)地初始優(yōu)試無線參

正初初始規(guī)劃計PCIPCI站址最終規(guī)站址案LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page32影響網(wǎng)絡規(guī)劃質(zhì)量的因?基礎數(shù)? 模??經(jīng)?地圖的精度為 模型屬于驗證可行的UniversalModel，這兩方的精度在客觀上可以如何獲得更高的網(wǎng)絡更準確 基礎數(shù)LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page33計LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)CommunicationsCompany.|2012-07-27|Page34優(yōu)前期規(guī)避明顯的錯誤（如明顯遮擋、過高站等等?數(shù)據(jù)庫”，“天面”，“天面LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page35TD-LTE無線網(wǎng)絡設計流客戶客戶需規(guī)劃其他行規(guī)劃其他行規(guī)劃驗收建合合同簽初始優(yōu)地初始優(yōu)試無線參

正初初始規(guī)劃計PCIPCI站址最終規(guī)站址案LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page36

主要輸出

LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page37網(wǎng)優(yōu)前移，優(yōu)化設根據(jù)業(yè)務需求和長期演進，合理設計網(wǎng)絡。修補式的建設方式導致復雜的網(wǎng)絡結?TD-LTE網(wǎng)絡優(yōu)化宜采用優(yōu)化前移，統(tǒng)一合理優(yōu)化設計的策略，在網(wǎng)絡設計工作?TD- ?小區(qū)邊界的RSRP&?小區(qū)邊界上/?小區(qū)平均上/???

?網(wǎng)優(yōu)前移—網(wǎng)優(yōu)不能再只是善 質(zhì)絡網(wǎng)絡設計質(zhì)絡質(zhì)量LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page38網(wǎng)優(yōu)前移的意LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page39精細的規(guī)劃方LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page40精細的規(guī)劃方LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page41更準確更合理的仿真預測方 LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page42 模?基 建筑物數(shù)據(jù),更精確預 路損,以便更準確地LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page43垂直預測和仿預測不同樓層高度的RSRP和垂直預測的必要性由于市區(qū)中樓宇較多,許 都需要通過室外 來覆高樓外的信號強,干擾大;預測可以為高樓的室分RSRP規(guī)劃提供參LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page44基于現(xiàn)網(wǎng)的話務分LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page45基于潛在數(shù)據(jù)業(yè)務的話務預預測業(yè)務量需求的數(shù)據(jù)來源TD-Wi-TBF激活數(shù)可以用來預測話務需R-PMO可以用來收集數(shù)LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page46基于話務的覆蓋統(tǒng)計方法和權不同場景，應考慮對應不同RSRP和SINR需求，應該設計最佳的統(tǒng)計方法應該是基于話務的統(tǒng)計方法這將直接反映LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page47精細的規(guī)劃方LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page48得到全部有效和潛在 和相關信初步選擇站高小于35m為初步選定的站址設用初步選定的站址,查找利用下列方法解決以上問題去除/增 調(diào)整天線方向高站方案其他特定場景方案SINR優(yōu)鄰區(qū)設參數(shù)設LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-27|Page49精細的規(guī)劃方LTEdesignandoptimizationservice|Commercialinconfidence|?Ericsson(China)Communications .|2012-07-2