VOLTE-ATU信令流程詳解

1、VOLTE-ATU信令流程詳解NetworkDirTypeName消息注釋主叫UpSIPIMS_SIP_INVITE-Request（0）UE   A，摘機對UE B發(fā)起呼叫，用戶A首先向AS服務器發(fā)起INVITE請求。主叫UpEMMService Request業(yè)務請求主叫UpUL-CCCHRRC Connection   RequestUE   A呼叫UE B，此時A發(fā)現(xiàn)其為IDLE模式，則需要先建立信令連接。首先緩存需要發(fā)送的數(shù)據(jù)，向eNodeB發(fā)起RRC Connection Request，攜帶初始UE ID和S-TMSI（第一次是隨機值，此時TMSI值

2、應為有效）。主叫DownDL-CCCHRRC Connection SetupeNodeB向UE回復RRC   Connection Setup，其中攜帶無線資源專用配置信息。主叫UpUL-DCCHRRC Connection Setup   CompleteUE   A向eNodeB回復RRConnection Setup Complete，確認RRC建立成功完成。其中攜帶選擇的PLMN ID，注冊的MME信息（plmn-id、mmegi、mmec），NAS消息（Service Request）。主叫DownDL-CCCHRRC Connection Setup

3、eNodeB向UE回復RRC   Connection Setup，其中攜帶無線資源專用配置信息。主叫DownDL-DCCHSecurity Mode Command下行NAS消息（空口加密命令下發(fā)）主叫UpUL-DCCHSecurity Mode   Complete上行NAS消息（空口加密執(zhí)行）主叫DownDL-DCCHRRC Connection   ReconfigurationeNodeB向UE發(fā)起RRC   Connection Reconfiguration，其中攜帶無線資源專用配置信息。主叫UpUL-DCCHRRC Connection

4、  Reconfiguration CompleteUE A 執(zhí)行RRC Connection   Reconfiguration Complete主叫DownDL-DCCHUE Capability EnquiryUE 能力查詢主叫UpUL-DCCHUE Capability   InformationUE 能力回復主叫DownDL-DCCHRRC Connection   Reconfiguration主叫UpUL-DCCHRRC Connection   Reconfiguration Complete主叫DownSIPIMS_SIP_I

5、NVITE-Trying（100）AS服務器回復100 Trying給UE A說明收到INVITE請求。主叫DownDL-DCCHRRC Connection   Reconfiguration主叫UpUL-DCCHRRC Connection   Reconfiguration Complete主叫DownESMActivate Dedicated   EPS Bearer Context Request專用承載激活請求主叫UpESMActivate Dedicated   EPS Bearer Context Accept專用承載激活接受主叫UpUL

6、-DCCHUL Information   Transfer通過ULinformationTransfer   消息將Activate dedicated EPS bearer context accept消息告知eNB主叫DownDL-DCCHRRC Connection   ReconfigurationRRC重配（測量配置信息）主叫UpUL-DCCHRRC Connection   Reconfiguration CompleteRRC重配執(zhí)行主叫DownPCCHPaging主叫DownDL-DCCHRRC Connection   Re

7、configuration主叫UpUL-DCCHRRC Connection   Reconfiguration Complete主叫DownDL-DCCHRRC Connection   Reconfiguration主叫UpUL-DCCHRRC Connection   Reconfiguration Complete被叫DownPCCHPaging被叫UpEMMService Request業(yè)務請求被叫UpUL-CCCHRRC Connection   Request緩存需要發(fā)送的數(shù)據(jù)，向eNodeB發(fā)起RRC   Connection

8、Request，攜帶初始UE ID和S-TMSI（第一次是隨機值，此時TMSI值應為有效）。被叫DownDL-CCCHRRC Connection SetupeNodeB向UE回復RRC   Connection Setup，其中攜帶無線資源專用配置信息。被叫UpUL-DCCHRRC Connection Setup   CompleteUE   B向eNodeB回復RRConnection Setup Complete，確認RRC建立成功完成。其中攜帶選擇的PLMN   ID，注冊的MME信息（plmn-id、mmegi、mmec），NAS消息（Ser

9、vice Request）。被叫DownDL-DCCHSecurity Mode Command下行NAS消息（空口加密命令下發(fā)）被叫UpUL-DCCHSecurity Mode   Complete上行NAS消息（空口加密執(zhí)行）被叫DownDL-DCCHRRC Connection   Reconfiguration被叫UpUL-DCCHRRC Connection   Reconfiguration Complete被叫DownDL-DCCHUE Capability EnquiryUE 能力查詢被叫UpUL-DCCHUE Capability  

10、InformationUE 能力信息回復被叫DownDL-DCCHRRC Connection   Reconfiguration被叫UpUL-DCCHRRC Connection   Reconfiguration Complete被叫DownSIPIMS_SIP_INVITE-Request（0）AS服務器通過認證確認用戶認證已通過后，向被叫UE B轉送INVITE請求。被叫UpSIPIMS_SIP_INVITE-Trying（100）UE   B向AS服務器送呼叫處理中的應答消息，100 Trying 被叫UpSIPIMS_SIP_INVITE-S

11、ession   Progress（183）UE   B向AS服務器送183 Session Progress消息，提示建立對話的進度信息。（此時被叫QCI1專用承載建立）被叫DownDL-DCCHRRC Connection   Reconfiguration被叫UpUL-DCCHRRC Connection   Reconfiguration Complete被叫DownESMActivate Dedicated   EPS Bearer Context Request專用承載激活請求被叫UpESMActivate Dedicated &#

12、160; EPS Bearer Context Accept專用承載激活接受被叫UpUL-DCCHUL Information   Transfer被叫DownDL-DCCHRRC Connection   Reconfiguration被叫UpUL-DCCHRRC Connection   Reconfiguration Complete主叫DownDL-DCCHDL Information   Transfer主叫DownESMModify EPS Bearer   Context Request專用承載修改請求主叫UpESMModify

13、EPS Bearer   Context Accept專用承載修改執(zhí)行主叫UpUL-DCCHUL Information   Transfer通過ULinformationTransfer   消息將Modify EPS Bearer Context Accept消息告知eNB主叫DownSIPIMS_SIP_INVITE-Session   Progress（183）.AS服務器向主叫UE A轉送183 Session Progress消息，UE A了解到整個Session的建立進度消息。（QCI5 QCI1建立）主叫UpSIPIMS_SIP_PRAC

14、K-Request（0）UE   A向AS服務回復臨時應答消息PRACK，表示收到183 Session Progress消息。 （等待網(wǎng)絡預留資源分配）主叫DownDL-DCCHRRC Connection   Reconfiguration主叫UpUL-DCCHRRC Connection   Reconfiguration Complete被叫DownDL-DCCHRRC Connection   Reconfiguration被叫UpUL-DCCHRRC Connection   Reconfiguration Complet

15、e被叫DownSIPIMS_SIP_PRACK-Request（0）AS服務器向被叫UE B轉送臨時應答消息PRACK ，從而UE   B了解到UE A收到183 Session Progress消息。被叫UpSIPIMS_SIP_PRACK-OK（200）被叫UE   B向AS服務器發(fā)送200 OK消息，表示183 Session Progress請求已經(jīng)處理成功主叫DownPCCHPaging主叫DownSIPIMS_SIP_PRACK-OK（200）AS服務器向主叫終端A轉送200 OK消息主叫UpSIPIMS_SIP_UPDATE-Request（0）UE

16、 A在確認收到QCI   1等消息建立后，發(fā)起UPDATE消息，與被叫UE B協(xié)商SDP消息被叫DownSIPIMS_SIP_UPDATE-Request（0）AS服務器向被叫UE B轉送UE   A的UPDATE-Request消息。被叫UpSIPIMS_SIP_UPDATE-OK（200）被叫UE B向AS服務器發(fā)送200   OK消息，表示UPDATE請求已經(jīng)處理成功。被叫UpSIPIMS_SIP_INVITE-Ringing（180） 被叫用戶B振鈴，用戶振鈴后，向AS服務器發(fā)送180 Ringing 振鈴信息主叫DownSIPIMS_

17、SIP_UPDATE-OK（200）AS服務器向主叫UEA轉送200   OK消息，通知UE A UPDATE請求已經(jīng)處理成功。主叫DownSIPIMS_SIP_INVITE-Ringing（180）AS服務器向主叫UE A轉送180   Ringing 振鈴信息被叫DownDL-DCCHRRC Connection   Reconfiguration被叫UpUL-DCCHRRC Connection   Reconfiguration Complete被叫DownDL-DCCHRRC Connection   Reconfiguration被

18、叫UpUL-DCCHRRC Connection   Reconfiguration Complete被叫UpSIPIMS_SIP_INVITE-OK（200）被叫UE B向AS服務器發(fā)送200   OK消息，表明主叫最初的INVITE請求已經(jīng)處理成功。主叫DownSIPIMS_SIP_INVITE-OK（200）AS服務器向主叫UE A轉送200 OK消息，通知主叫UE A，被叫UE   B已經(jīng)對最初的INVITE請求處理成功主叫UpSIPIMS_SIP_ACK-Request（0）UE   A向AS服務器發(fā)送ACK消息，意在通知被叫UE B，主叫側已

19、經(jīng)了解被叫側處理INVITE請求成功。（通話連接建立）被叫DownSIPIMS_SIP_ACK-Request（0）AS服務器向被叫終端B轉送ACK信息。（通話建立）主叫DownPCCHPaging被叫DownPCCHPaging主叫UpSIPIMS_SIP_BYE-Request（0）UE   A向AS服務器發(fā)起B(yǎng)YE-Request（掛機請求）主叫DownDL-DCCHDL Information   Transfer主叫DownDL-DCCHRRC Connection   Reconfiguration主叫DownESMDeactivate EPS Bea

20、rer   Context Request專用承載去激活釋放請求主叫UpESMDeactivate EPS Bearer   Context Accept專用承載去激活釋放接受主叫UpUL-DCCHRRC Connection   Reconfiguration Complete主叫UpUL-DCCHUL Information   Transfer通過ULinformationTransfer 消息將Modify EPS Bearer Context Accept消息告知eNB主叫DownDL-DCCHRRC Connection   Reconfiguration被叫DownS