F.3 Application usage of SIP

24.3413GPPRelease 18Stage 3Support of SMS over IP networksTS

F.3.1 Procedures at the UE

F.3.1.1 3GPP PS data off

F.3.1.1.1 General

The requirements in clause E.3.1.1.1 apply.

F.3.1.1.2 Enforcement

If the 3GPP PS data off status is "active" and the UE is not configured with indication that SMS over IP is a 3GPP PS data off exempt service:

a) the UE shall not invoke the procedures in clause 5.3.1 or clause 5.3.2 with a UE’s contact address containing an IP address associated with a GPRS IP-CAN bearer; and

NOTE 1: If the UE doesn’t invoke the procedures in clause 5.3.1 or clause 5.3.2 due to conditions as described in bullet a, the UE can attempt a request for an equivalent service via the CS domain – if supported and available – and, otherwise, the UE can attempt the service according to 3GPP TS 24.229 [13] and as described in clause 5.3.1 or clause 5.3.2 via non-3GPP access.

b) if the UE registered a binding with IM CN subsystem, such that:

1) the contact address of the binding contains an IP address associated with a GPRS IP-CAN bearer; and

2) the Contact header field of the binding contains the g.3gpp.smsip media feature tag, the g.3gpp.smsip-msisdn-less media feature tag or both;

then:

1) the UE shall de-register the binding of a UE’s contact address containing an IP address associated with a GPRS IP-CAN bearer from IM CN subsystem according to 3GPP TS 24.229 [10]; or

2) the UE shall re-register the binding of a UE’s contact address containing an IP address associated with a GPRS IP-CAN bearer with IM CN subsystem with a Contact header field not including the g.3gpp.smsip media feature tag and the g.3gpp.smsip-msisdn-less media feature tag according to 3GPP TS 24.229 [10].

NOTE 2: Which of the bullets 1), and 2) the UE performs is influenced by other 3GPP PS data off exempt services.

F.3.2 Procedures at the AS

F.3.2.1 3GPP PS data off

The requirements in clause E.3.2.1 apply.

Annex G (normative):
IP-Connectivity Access Network specific concepts when using 5GS to access IM CN subsystem