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【正文】 敗通過(guò)地圖信息檢查周邊環(huán)境及站點(diǎn)分布弱覆蓋問(wèn)題調(diào)整工參或者增加新站增強(qiáng)周邊覆蓋ERAB失敗檢查小區(qū)可用性、告警等，可能多個(gè)站點(diǎn)出現(xiàn)類(lèi)似問(wèn)題傳輸問(wèn)題解決傳輸問(wèn)題6 相關(guān)案例 PRB資源受限一、問(wèn)題描述%，%，%，RRC建立失敗了4263次。 指標(biāo)定義ERAB建立成功是成功為用戶(hù)分配了用戶(hù)平面的連接比例。l 安全模式激活后，RBS通過(guò)向UE下發(fā)RRC CONNECTION RECONFIGURATION為數(shù)據(jù)承載分配資源。l RBS通過(guò)SECURITY MODE COMMAND信令要求UE使用安全模式。S1建立成功率=S1建立成功率次數(shù)/S1建立請(qǐng)求次數(shù)*100%=pmS1SigConnEstabSucc/pmS1SigConnEstabAtt*100% 詳細(xì)counter統(tǒng)計(jì)節(jié)點(diǎn)Signalling connection setup triggered by initial UE message UE Initial UE RBSmessageppmS1SigConnEstabAttEm +pmS1SigConnEstabAtt +step for cause ”Emergency”pmS1SigConnEstabAttHpa +pmS1SigConnEstabAttEm +pmS1SigConnEstabAttHpa +pmS1SigConnEstabAttMod +pmS1SigConnEstabAttMta +pmS1SigConnEstabAttMos +pmS1SigConnEstabAttDta +step for cause ”High Prio Access”pmS1SigConnEstabAttMod +step for cause ”Mobile Originating Data”pmS1SigConnEstabAttMta +step for cause ”Mobile Terminating Access”pmS1SigConnEstabAttMos +step for cause ”Mobile Originating Signalling”pmS1SigConnEstabAttDta +RBS timeout on initial context setup request from MME?step for cause ”Delay Tolerant Access” yesEnd signallingconnection setup NoMME sends initial context setup request to RBSRBS Initial context MMESetup request(ERABs, Sec keys)Any message received on the S1 logical connection? NO Stepped for any of the following pmS1SigConnEstabSucc +messages: Yes pmS1SigConnEstabSuccEm +S1 downlink NAS transport step for cause ”Emergency” S1 UE context release mand pmS1SigConnEstabSuccHpa +pmS1SigConnEstabAttEm +pmS1SigConnEstabAttHpa +pmS1SigConnEstabAttMod +pmS1SigConnEstabAttMta +pmS1SigConnEstabAttMos +pmS1SigConnEstabAttDta +S1 initial context setup request step for cause ”High Prio Access”S1 reset pmS1SigConnEstabSuccMod + step for cause ”Mobile Originating Data” pmS1SigConnEstabSuccMta + step for cause ”Mobile Terminating Access” pmS1SigConnEstabSuccMos + step for cause ”Mobile Originating Signalling” pmS1SigConnEstabSuccDta + step for cause Delay Tolerant Access” S1建立成功率處理經(jīng)驗(yàn)及流程失敗階段原因查找失敗原因優(yōu)化建議S1失敗檢查小區(qū)可用性、告警等，可能多個(gè)站點(diǎn)出現(xiàn)類(lèi)似問(wèn)題傳輸問(wèn)題解決傳輸問(wèn)題S1失敗檢查T(mén)AC在MME上的配置TAC配置問(wèn)題修復(fù)TAC配置S1失敗檢查T(mén)AC
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