【正文】
流程 (DCH)當(dāng) SRNC決定在公共信道上建立 RRC連接的時候,就不需要再配置 NodeB并建立 SRNC與 NodeB之間的數(shù)據(jù)承載了,因為都已經(jīng)建立好了。NAS信令建立流程Iu接口上的 ALCAP建立過程有多次,允許同時建立多條用戶面的 RAB;用戶面建立完畢后, UE進入通話過程。軟切換216?;顒蛹?“Active Set” Set of radio links simultaneously involved in a specific munication service between an User Equipment and a UTRAN access point軟切換相關(guān)概念Node BRNCAirBridgeAirBridgeAirBridge軟切換流程示意圖同頻 – 不同碼222。RNC分集合并Node BRNCAirBridgeAirBridgeAirBridge軟切換流程示意圖同頻 – 不同碼222。DRNC透傳Node BAirBridgeAirBridgeAirBridgeServing RNCDrift RNC軟切換流程示意圖 (SRNCDRNC)Node BAirBridgeAirBridgeAirBridgeServing RNCRNC軟切換流程示意圖 (SRN遷移 )軟切換前 軟切換后軟切換示意圖CNSRNCNodeBNodeBCNSRNCNodeBNodeBCNSRNCNodeBNodeB軟切換中軟切換流程示意圖( RNC內(nèi))Decision to setupnew RL7. DCCH : Active Set Update Complete : Active Set Update CommandUE Node B(new) SRNCNBAP1. Radio Link Setup RequestNBAPNBAP2. Radio Link Setup ResponseNBAP3 ALCAP Iub Data Transport Bearer SetupStart RX descriptionDCHFP4. Downlink SynchronisationDCHFP SynchronisationDCHFPStart RX descriptionRRCRRCRRCRRC軟切換流程( RNC內(nèi) add branch)Decision to deletea RL2. DCCH : Active Set Update Complete : Active Set Update CommandUE Node B(old) SRNCNBAP3. Radio Link Deletion RequestNBAPNBAP4. Radio Link Deletion ResponseNBAPRRCRRCRRCRRCStop RX and Tx5 ALCAP Iub Transport Bearer release軟切換流程( RNC內(nèi) del branch)軟切換前 軟切換后無線鏈路同時增加與刪除CNSRNC RNCNodeB NodeBNodeBCNSRNC RNCNodeB NodeBNodeB軟切換流程示意圖(跨 RNC)7. Uplink SynchronisationRNSAP RNSAP1. Radio Link Setup RequestStart TX descriptionRNSAP RNSAP4. Radio Link SetupResponseNBAP NBAP2. Radio Link Setup RequestNBAP NBAP3. Radio Link Setup ResponseStart RX descriptionDecision to setupnew RL andrelease old RLNBAP 10. Radio Link Deletion RequestNBAP NBAP11. Radio Link Release ResponseStop RX and TX12. ALCAP Iub Data Transport Bearer ReleaseRRCRRC 9. DCCH : Active Set Update CompleteRRCRRC 8. DCCH: Active Set Update Command[Radio Link Addition Deletion]NBAPUE Node BDrift RNSNode BServing RNSDrift RNC Serving RNCALCAP Iur Bearer Setup5. ALCAP Iub Data Tra