Page 465 - 5G Basics - Core Network Aspects

Core network aspects 1

9.3.1 User registration call flow

Mobile Access PSTN (MSC/VLR) PAM-SCP IP HLR/AuC
station point switch /SSP (HSS)
1. Automatic call setup-
Service register request (SAC, request type, 3. Query
(user identity) terminal identifier) 2. Set up request- (triggered by N-CSI)
4. Prepare special resource
5. Establish connection with special resource
7. Set up response- 6. Special resource connected
8. Special resource ready
9. Send info request (IMSI), wait for result
10. Send info request (user identification) in FSK
11. Send user identity in FSK
12. Result of info request
13. Retrieve authentication info
14. Authentication info ack
15. Send authentication info
Service authentication request 16. Send authentication info in FSK
Service authentication response 17. Authentication result calculated by terminal in FSK
18. Result of authentication
19. Retrieve user profile
20. User profile data
21. Activate the PAM service
22. Activate ack
23. Send registration response
Service register response 24. Send registration response in FSK
26a. Release the special resource 25. Result of sending response
27a. Release
26b. On hook 28a. Release complete
27b. Release
28b. Release complete
29. Report release event
30. End of query
Q.1763/Y.2803(07)_F08

Figure 8 – User registration call flow

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