6.0 General

23.2043GPPRelease 17Stage 2Support of Short Message Service (SMS) over generic 3GPP Internet Protocol (IP) accessTS

The clause describes the procedures for the support of transport-level interworking between Short Message service and encapsulated Short Message via IP service, for the support of the service-level interworking for the Short Message service and Instant Messaging service as defined in OMA-TS-SIMPLE_IM-V1_0 [12], for the support of the service-level interworking for the Short Message service and Converged IP Messaging service as defined in OMA-TS-CPM_Conv_Fnct-V1_0 [17] and for the support of receiving MT-SMS to a UE without MSISDN. Clauses only applying to either transport-level interworking or service-level interworking are indicated as such.

NOTE: In the procedures in the following clauses, the I‑CSCF, P‑CSCF and ASs such as IM AS, as well as nodes specific to CPM functions such as ISF, are not shown in the figures.