4.17 Support of short message service

23.2283GPPIP Multimedia Subsystem (IMS)Release 18Stage 2TS

4.17.1 IP Short Message Gateway (IP-SM‑GW)

The IP‑SM‑GW acts as an SIP-AS in the IMS domain to provide the protocol interworking for the delivery of the short message between the UE and the Service Centre. All functionalities and interfaces of IP‑SM‑GW are defined in TS 23.204 [56].