Section: 5.16.2 SMS over NAS 5.16.2.1 General
Content: This clause includes feature description for supporting SMS over NAS in 5G System. Support for SMS incurs the following functionality: - Support for SMS over NAS transport between UE and AMF. This applies to both 3GPP and Non 3GPP accesses. - Support for AMF determining the SMSF for a given UE. - Support for subscription checking and actual transmission of MO/MT-SMS transfer by the SMSF. - Support for MO/MT-SMS transmission for both roaming and non-roaming scenarios. - Support for selecting proper domains for MT SMS message delivery including initial delivery and re-attempting in other domains.