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1、湖南移動(dòng)TD-LTE掉線優(yōu)化指導(dǎo)手冊(cè)2015年2月湖南移動(dòng)TD-LTE掉線優(yōu)化指導(dǎo)手冊(cè)23目錄1概述32掉線率相關(guān)KPI指標(biāo)32.1掉線率指標(biāo)定義32.2掉線率相關(guān)統(tǒng)計(jì)項(xiàng)42.2.1無(wú)線掉線率統(tǒng)計(jì)項(xiàng)42.2.2ERAB掉線率統(tǒng)計(jì)項(xiàng)42.2.3掉線原因統(tǒng)計(jì)項(xiàng)52.2.4掉線的常見(jiàn)問(wèn)題53掉線問(wèn)題的分析和定位63.1掉線問(wèn)題的分析63.1.1UEinitialedDrop過(guò)程63.1.2eNBinitialeddrop過(guò)程83.1.3MMEinitialedDrop過(guò)程83.2掉線問(wèn)題的原因93.3掉線問(wèn)題的定位93
2、.4掉線問(wèn)題處理流程圖103.4.1掉線整體分析113.4.2掉線Top小區(qū)分析113.4.3小區(qū)故障排查123.4.4切換導(dǎo)致掉線問(wèn)題分析133.4.5基站上行RLF檢測(cè)機(jī)制引起的掉線133.4.6無(wú)線環(huán)境導(dǎo)致掉線133.4.7終端類問(wèn)題133.4.8個(gè)性問(wèn)題單獨(dú)分析133.5掉線問(wèn)題優(yōu)化方案143.5.1切換優(yōu)化14湖南移動(dòng)TD-LTE掉線優(yōu)化指導(dǎo)手冊(cè)233.5.2參數(shù)優(yōu)化143.5.3干擾優(yōu)化153.5.4覆蓋優(yōu)化154掉線問(wèn)題典型案例151概述本文主要介紹了TD-LTE掉線問(wèn)題優(yōu)化方法，通過(guò)對(duì)出現(xiàn)各種情況
3、的掉線問(wèn)題進(jìn)行講解說(shuō)明，總結(jié)了TD-LTE掉線的處理思路及優(yōu)化方案，為后續(xù)處理TD-LTE掉線問(wèn)題提供了優(yōu)化經(jīng)驗(yàn)。2掉線率相關(guān)KPI指標(biāo)2.1掉線率指標(biāo)定義湖南移動(dòng)TD-LTE掉線優(yōu)化指導(dǎo)手冊(cè)23無(wú)線掉線率=∑（eNB請(qǐng)求釋放上下文數(shù)-正常的eNB請(qǐng)求釋放上下文數(shù)）/∑(初始上下文建立成功次數(shù)+遺留上下文個(gè)數(shù))*100%，其中∑代表將本地網(wǎng)范圍內(nèi)的各個(gè)小區(qū)的統(tǒng)計(jì)結(jié)果累加。諾基亞的無(wú)線掉線率公式是：100*sum(M8013C15+M8013C16)/sum(M8006C35+M8006C36+M8006C168+
4、M8006C169+M8006C170)ERAB掉線率=∑(eNB請(qǐng)求釋放的E-RAB數(shù)-正常的eNB請(qǐng)求釋放的E-RAB數(shù)+切出失敗的E-RAB數(shù))/∑(E-RAB建立成功數(shù)+遺留E-RAB個(gè)數(shù))*100%，其中∑代表將本地網(wǎng)范圍內(nèi)的各個(gè)小區(qū)的統(tǒng)計(jì)結(jié)果累加。諾基亞的ERAB掉線率公式是：100*sum(M8006C12+M8006C13+M8006C14)/sum(M8006C6+M8006C7+M8006C8+M8006C9+M8006C10+M8006C12+M8006C13+M8006C14+M8006C
5、15)1.1掉線率相關(guān)統(tǒng)計(jì)項(xiàng)1.1.1無(wú)線掉線率統(tǒng)計(jì)項(xiàng)網(wǎng)管統(tǒng)計(jì)項(xiàng)有：CounterIDNameintableNECounterNameM8013C15ENB_INIT_TO_IDLE_RNLeNBinitiatedtransitionstoECM-IDLEduetoRadioNetworkLayercauseM8013C16ENB_INIT_TO_IDLE_OTHEReNBinitiatedtransitionstoECM-IDLEduetoOthercausesM8006C35EPS_BEARER_STP_CO
6、M_INI_QCI1InitialEPSBearersetupcompletionsforQCI1M8006C36EPS_BEAR_STP_COM_INI_NON_GBRInitialEPSBearersetupcompletionsfornon-GBRM8006C168EPS_BEARER_STP_COM_INI_QCI_2InitialEPSBearersetupcompletionsforGBRDRBsofQCI2M8006C169EPS_BEARER_STP_COM_INI_QCI_3InitialEPS
7、BearersetupcompletionsforGBRDRBsofQCI3M8006C170EPS_BEARER_STP_COM_INI_QCI_4InitialEPSBearersetupcompletionsforGBRDRBsofQCI4湖南移動(dòng)TD-LTE掉線優(yōu)化指導(dǎo)手冊(cè)231.1.1ERAB掉線率統(tǒng)計(jì)項(xiàng)網(wǎng)管統(tǒng)計(jì)項(xiàng)有：CounterIDNameintableNECounterNameM8006C6EPC_EPS_BEARER_REL_REQ_NORMEPCinitiatedEPSBearerReleas
8、erequestsduetoNormalreleasebyUEM8006C7EPC_EPS_BEARER_REL_REQ_DETACHEPCinitiatedEPSBearerReleaserequestsduetoDetachprocedurebyUEorMMEM8006C8EPC_EPS_BEARER_REL_REQ_RNLEPCinitiatedEPSBearerR
