B.9 Example analysis for S-CSCF

23.3353GPPRelease 17Stage 2Technical realization and information flowsTSUser Data Convergence (UDC)

1. An S-CSCF (in non-UDC Networks) stores (or may store) user data (while no session is ongoing i.e. no SCSCF-application logic is running) and performs application logic, therefore step 1 is applicable.

2. An S-CSCF (in non-UDC Networks) does not store permanent user data provisioned at the S-CSCF, therefore step 2 is not applicable.

3. Outsourced S-CSCF user data may be stored in a common UDR, but access from Provisioning FEs is not applicable. Step 3 is applicable, but does not provide any benefit.

4. Parallel sessions in two different S-CSCF-FEs may be regarded a challenge.

Step 4 is not applicable.

In summary the applicable steps (1 and 3) do not provide any benefit.