Section: 6.2.13 SMSF
Content: The SMSF supports the following functionality to support SMS over NAS: - SMS management subscription data checking and conducting SMS delivery accordingly. - SM-RP/SM-CP with the UE (see TS 24.011[ Point-to-Point  (PP) Short Message Service (SMS) support on mobile radio interface ]  [6]). - Relay the SM from UE toward SMS-GMSC/IWMSC/SMS-Router. - Relay the SM from SMS-GMSC/IWMSC/SMS-Router toward the UE. - SMS charging. - Lawful Interception. - Interaction with AMF and SMS-GMSC for notification procedure that the UE is unavailable for SMS transfer (i.e, notifies SMS-GMSC to inform UDM when UE is unavailable for SMS).