G.2 5GS aspects when connected to the IM CN subsystem

24.3413GPPRelease 18Stage 3Support of SMS over IP networksTS

G.2.1 Procedures at the UE

G.2.1.1 Indications to lower layers about start and stop of SMSoIP

The following information is provided to the non-access stratum:

– MO-SMSoIP-attempt-started;

– MO-SMSoIP-attempt-ended;

– MT-SMSoIP-attempt-started;

– MT-SMSoIP-attempt-ended; and

– for 3GPP access only, handover of ongoing SMSoIP from non-3GPP access.

Upon request from the user to submit an originating SM over IP as described in clause 5.3.1 and no other originating SM over IP as described in clause 5.3.1 exists, the UE sends the MO-SMSoIP-attempt-started indication to the non-access stratum. The UE shall:

a) if the barring result is "not-barred", continue with SM over IP submission as described in clause 5.3.1; and

b) if the barring result is "barred", reject the SM over IP submission.

When a terminating SM over IP submission is started and no other terminating SM over IP submission as described in clause 5.3.2 exists, the UE sends the MT-SMSoIP-attempt-started indication to the non-access stratum.

When an originating SM over IP submission is completed and no other originating SM over IP submission as described in clause 5.3.1 exists, the UE sends the MO-SMSoIP-attempt-ended indication to the non-access stratum.

When a terminating SM over IP submission is completed and no other terminating SM over IP submission as described in clause 5.3.2 exists, the UE sends the MT-SMSoIP-attempt-ended indication to the non-access stratum.

When an ongoing originating SMS service over IP network is handed over from non-3GPP access to 3GPP access, the UE sends the MO-SMSoIP-attempt-started indication and the handover of ongoing SMSoIP from non-3GPP access indication to the non-access stratum.

When an ongoing terminating SMS service over IP network is handed over from non-3GPP access to 3GPP access, the UE sends the MT-SMSoIP-attempt-started indication and the handover of ongoing SMSoIP from non-3GPP access indication to the non-access stratum.