【資料名稱】：NORTEL CallAnalysis&callflow

【資料作者】：MSSBSC

【資料日期】：2008

【資料語言】：中文

【資料格式】：PPT

【資料目錄和簡介】：

SM Basic Call Process Performance Analysis

LM Call Description
1. PSTN originates call to GMSC with IAI ( called number MSISDN).
2. GMSC sends SRI message (Send Routing Information) to HLR, HLR verifies whether the call
is allowed.
3. HLR sends PRN message(Provide Roaming Number) to VLR according to VLR location.
4. VLR verifies MS status, assign MSRN and send back to HLR in the message PRN ACK.
5. HLR sends MSRN back to GMSC in the message SRI ACK.
6. GMSC routes the call the MSC/VLR with IAI ( called number MSRN)
7. MSC get TMSI/IMSI, LAC sends Paging request to BSS.
8. MS receives Paging message and send Paging Response back.
9. MSC sends AUTHENTICATE REQUEST to MS.
10. MS sends AUTHENTICATE RESPONSE to VLR.
11. MSC sends CIPHER MOD CMD to MS.
12. MS sends CIPHER MOD COM to MSC.
13. MSC sends Set Up to MS.
14. MS sends Call Confirm to MSC.
15. MSC sends Assignment Request to BSC.
16. BSC sends Assignment Complete to MSC.
17. Handset ringring, MS sends Alerting message to MSC.
18. MSC sends ACM message to GMSC, PSTN.
19. Handset answer the call, MS sends Connect message to MSC.
20. MSC send to ANC message to GMSC, PSTN.