gsm網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)與信令流程-資料下載頁(yè)
2025-02-27 16:20本頁(yè)面
【正文】 mandestablish indicationChannel requestUA(pag_resp)Cipher Mode CommandImmediate assignment Authentication responseSetupCipher Mode CommandCipher Mode CompletePaging CommandPaging Request Paging被叫流程之二MS BSCBTS MSCAssignment RequestChannel activation ackAssignment mandestablish indicationAssignment Complete Assignment CompleteDeactivate SACCHRelease requestRelease confirmRF Channle releaseRF Channel release ackAlertingConnectConnect acknowledgeSABMUAChannel activation被叫不在服務(wù)區(qū)MS BSCBTS MSCChannel activation ackChannel activationChannel requiredImmediate assign mandChannel requestImmediate assignment Paging CommandPaging Request PagingDeactivate SACCHRelease requestRelease confirmRF Channle releaseRF Channel release ackMS BSCChannel activation ackChannel activationEncryption mandChannel requiredComplete Layer 3 Info.Authentication requestTMSI reallocation pleteCipher Mode CompleteSABM(loc_upd_req)Immediate assign mandestablish indicationBTSChannel requestUA(loc_upd_req)Cipher Mode CommandImmediate assignment MSCAuthentication responseLocation updating acceptCipher Mode CommandCipher Mode Complete位置更新流程之一 位置更新流程MS BSCBTS MSC位置更新流程之二Channel Release Clear CommandRF Channle releaseDISCDeactivate SACCHRF Channel release ackRelease IndicationUAClear CompleteMS Measurement report Measurement resultChannel ActiveChannel Active Ack Channel Active NackASSIGN COMMANDSABMUA EST INDRF Channel RELRF Channel REL AckHANDOVER PERFORMEDBTSA BSC MSCASSIGN FAILUREASSIGN COMPLETE小區(qū)內(nèi)切換 切換流程HO PERFORMEDMeasurement report Measurement resultMSChannel ActiveChannel Active Ack Channel Active NackHOCOMMAND HOACCESSPHYS INFOHODETECTIONSABMUAEST INDHO FALUREHOCOMPLETERF Channel RELRF Channel REL AckBTSA BSC MSC BTSB MSBSC 內(nèi)部切換BSC間切換 信令流程中重要定時(shí)器介紹 重要信令消息內(nèi)容詳解 UM口重要信令消息； ABIS口重要信令消息； A口重要信令消息；System information type 2空閑模式下與服務(wù)小區(qū)同頻段的鄰小區(qū)頻點(diǎn)集；System information type 2ter空閑模式下與服務(wù)小區(qū)不同頻段的鄰小區(qū)頻點(diǎn)集System information type 5專用模式下與服務(wù)小區(qū)同頻段的鄰小區(qū)頻點(diǎn)集；System information type 5ter專用模式下與服務(wù)小區(qū)不同頻段的鄰小區(qū)頻點(diǎn)集UM口UM口CMREQ或 PAGRESUM口SETUPUM口Assighment mandUM口handover mandUM口DISCUM口測(cè)量報(bào)告ABIS口CONFLABIS口ERRINABIS口測(cè)量報(bào)告A口ASSREQ 常用信令分析軟件1 基本信令分析方法根據(jù)接口分類216。UM口分析216。ABIS口分析216。A口分析216。E口分析根據(jù)問(wèn)題類型分配216。壞小區(qū)分析216。切換分析216。其他問(wèn)題分析UM口分析通過(guò)對(duì)系統(tǒng)消息和測(cè)量報(bào)告的分析發(fā)現(xiàn)包括切換、小區(qū)選擇等方面的無(wú)線問(wèn)題；進(jìn)行特定的撥打測(cè)試配合定位非無(wú)線問(wèn)題。應(yīng)用范圍 通過(guò)對(duì)系統(tǒng)消息、測(cè)量報(bào)告、指配命令、切換命令等消息具體內(nèi)容的分析，準(zhǔn)確掌握問(wèn)題發(fā)生時(shí)源小區(qū)的具體信道和無(wú)線狀況、目標(biāo)小區(qū)的具體信道和無(wú)線狀況。通過(guò)對(duì)測(cè)試手機(jī)的一些強(qiáng)制性命令，觀察此時(shí)的信令流程來(lái)分析切換困難、單通、回聲等系統(tǒng)問(wèn)題。應(yīng)用方法UM口分析216。ABIS口分析主要分析思路：1）篩選出問(wèn)題信令（如掉話 CONFAIL/ERROR INDICATION，切換失敗 HOFAI），而后篩選出該次事件的完整信令，根據(jù)對(duì)事件發(fā)生前的服務(wù)小區(qū)和鄰區(qū)無(wú)線狀況進(jìn)行分析，從而定位問(wèn)題。一方面可以對(duì)壞小區(qū)進(jìn)行定位，另外通過(guò)對(duì)大量問(wèn)題事件的分析對(duì)參數(shù)設(shè)置策略可作出指導(dǎo)作用；2）對(duì)各載頻各信道的測(cè)量報(bào)告進(jìn)行分析；例 掉話分析216。ABIS口分析例 切換分析216。ABIS口分析216。A口分析主要分析思路：通過(guò)對(duì)特定呼叫（如特定號(hào)碼、特定小區(qū)）或?qū)ｉT(mén)進(jìn)行的撥打測(cè)試進(jìn)行信令跟蹤找出問(wèn)題發(fā)生的環(huán)節(jié)，判斷可能原因后做進(jìn)一步分析；（例如單通、串話等問(wèn)題）對(duì)異常信令進(jìn)行篩選歸納，找出問(wèn)題的共性并作進(jìn)一步的分析；（例如接續(xù)困難，異常拆鏈）信令流程的統(tǒng)計(jì)分析，主要通過(guò)對(duì)信令流程中各環(huán)節(jié)的次數(shù)、時(shí)間間隔等進(jìn)行分析發(fā)現(xiàn)問(wèn)題所在。（如接續(xù)時(shí)長(zhǎng)、話音接通率等）216。E口分析216。壞小區(qū)分析主要通過(guò) ABIS口信令分析定位造成掉話率偏高、切換成功率偏低、呼叫建立成功率偏低等問(wèn)題。216。切換分析通過(guò) A口信令分析可定位由于交換數(shù)據(jù)問(wèn)題導(dǎo)致的切換問(wèn)題；通過(guò) ABIS口信令分析（分別收集源小區(qū)和目標(biāo)小區(qū) ABIS口信令）可發(fā)現(xiàn)無(wú)線參數(shù)設(shè)置和無(wú)線質(zhì)量問(wèn)題（包括電平問(wèn)題、質(zhì)量問(wèn)題、載頻故障、鏈路不平衡、上行干擾等）216。其他問(wèn)題分析單通、竄話、回聲、斷噪等話音質(zhì)量問(wèn)題?？赏ㄟ^(guò)進(jìn)行撥打測(cè)試并進(jìn)行信令跟蹤，或?qū)Ω鹘涌陔娐窌r(shí)隙占用時(shí)長(zhǎng)占用、頻度進(jìn)行統(tǒng)計(jì)分析得到定位；呼叫失敗?？赏ㄟ^(guò)對(duì)特定號(hào)碼或呼叫失敗信令進(jìn)行完整的信令流程跟蹤，對(duì)失敗信令消息的具體內(nèi)容進(jìn)行分析后得到確認(rèn)。話音接通率分析，通過(guò)對(duì) E口、 A口信令進(jìn)行統(tǒng)計(jì)分析，對(duì)未接通的流程進(jìn)行歸類統(tǒng)計(jì)并作。通話接續(xù)時(shí)長(zhǎng)分析，通過(guò)對(duì)信令流程進(jìn)行分段統(tǒng)計(jì)分析找出時(shí)長(zhǎng)偏長(zhǎng)原因。用戶惡意行為，如短信群發(fā)等。演講完畢，謝謝觀看！
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