H.4 Procedures and flows for non roaming users

23.2923GPPIP Multimedia Subsystem (IMS) centralized servicesRelease 17Stage 2TS

H.4.1 Authentication/Registration for own users not roaming

For authentication/registration procedure for own users not roaming please refer to annex G of this specification.

H.4.2 Originating session for own users not roaming

Session origination for own users is specified in clause 7.3.2.1.2 Origination using I2 reference point

H.4.3 Terminating session for own users not roaming

Session termination for own users is specified in clause 7.4.2.1.2 Termination using I2 reference point

H.4.4 SMS-MO for own users not roaming

Figure H.4.4-1 SMS-MO for own users not roaming

1) UE submits the standard CS Short Message (as described in TS 23.040 [50]and TS 24.011 [53]) to the MSC Server enhanced for SeDoC.

2) MSC Server enhanced for SeDoC encapsulates the Short Message (SMS-SUBMIT, SC Address) and submits it to the S-CSCF using an appropriate SIP method (as described in TS 23.204 [51]and TS 24.341 [52]).

3) S-CSCF forwards the encapsulated Short Message (SMS- SUBMIT, SC Address) to IP-SM-GW (AS) based on stored iFC.

4) IP-SM-GW (AS) acknowledges the SIP message.

5) SIP message acknowledge is forwarded by S-CSCF to MSC Server enhanced for SeDoC.

6) The IP-SM-GW performs service authorization based on the stored subscriber data. The IP SM GW checks whether the subscriber is authorised to use the short message service. The IP-SM-GW (AS) extracts the Short Message (SMS- SUBMIT) and forwards it towards the SMS-SC (SC Address) using standard MAP or Diameter based (SGd/Gdd) signalling (as described in TS 23.040 [50]).

7) The SMS-SC sends a Submit report (SMS-SUBMIT REPORT) to IP-SM-GW (AS) (see TS 23.040 [50]).

8) IP-SM-GW (AS) sends the Submit report to S-CSCF, encapsulated in an appropriate SIP request.

9) The S-CSCF sends the encapsulated Submit report to the MSC Server enhanced for SeDoC.

10) MSC Server enhanced for SeDoC sends the Submit report to the UE.

11) The MSC Server enhanced for SeDoC acknowledges the SIP request.

12) The S-CSCF acknowledges the SIP request.