3 Definitions of terms and abbreviations

23.5403GPP5G System: Technical realization of Service Based Short Message ServiceRelease 17Stage 2TS

3.1 Terms

For the purposes of the present document, the terms given in 3GPP TR 21.905 [1] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP TR 21.905 [1].

alert‑SC: service element provided by a GSM/UMTS/EPS/5GS PLMN to inform an SC which has previously initiated unsuccessful short message delivery attempt(s) to a specific MS/UE, that the MS/UE is now recognized by the PLMN to have recovered operation.

Gateway MSC For Short Message Service (SMS‑GMSC): function of an MSC capable of receiving a short message from an SC, interrogating an HLR/HSS/UDM for routing information and SMS info, and delivering the short message to the VMSC/SGSN/MME/SMSF of the recipient MS/UE.

Interworking MSC For Short Message Service (SMS‑IWMSC): function of an MSC capable of receiving a short message from within the PLMN and submitting it to the recipient SC.

IP-Short-Message-Gateway (IP-SM-GW): function responsible for protocol interworking between the IP-based UE and the SC.

Service Centre (SC): function responsible for the relaying and store and forwarding of a short message between an SME and an MS/UE.

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1] and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 [1].

GPSI Generic Public Subscription Identifier

MNPF Mobile Number Portability Function

MO SMS Mobile Originated Short Message Service

MT SMS Mobile Terminated Short Message Service

NAS Non-Access-Stratum

NP Number Portability

NRF Network Repository Function

SBA Service Based Architecture

SBI Service Based Interface

SCP Service Communication Proxy

SMS Short Message Service

SM MO Short Message Mobile Originated

SM MT Short Message Mobile Terminated

SMSF Short Message Service Function

SMSoNAS SMS over NAS

UDM Unified Data Management