3 Definitions, symbols and abbreviations

23.5543GPPApplication architecture for MSGin5G ServiceRelease 18Stage 2TS

3.1 Definitions

For the purposes of the present document, the terms and definitions 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].

AS-to-Point messaging: an MSGin5G message delivery that is originated at an Application Server in the network and terminated at a UE.

Broadcast Area: an area consisting of one or more cells where the broadcast message is delivered.

Broadcast messaging: an MSGin5G message delivery that is delivered to UEs in a Broadcast Area.

Broadcast Message Gateway: the entity in MSGin5G Service to support delivery Broadcast messages to Legacy 3GPP UEs, Non-3GPP UEs and MSGin5G UEs.

Constrained UE: a UE (with or without MSGin5G Client) which may not have capability to connect to the 3GPP network.

Group messaging: message delivery that is originated at a UE or an Application Server and is terminated at all members of the group (a group member can be of type UE, Legacy 3GPP UE or Non-3GPP UE).

Legacy 3GPP Message Gateway: the entity in MSGin5G Service to support interworking with Legacy 3GPP UEs.

Legacy 3GPP UE: the UE that supports legacy 3GPP message sending and receiving (e.g. SMS, NIDD, etc) in MSGin5G Service.

MSGin5G Client: the client that enables MSGin5G message sending and receiving.

Message Gateway: general terminology for Legacy 3GPP Message Gateway, Non-3GPP Message Gateway, or Broadcast Message Gateway.

MSGin5G Gateway UE: an MSGin5G UE which constructs and sends MSGin5G message upon receiving request along with required application specific data from the Application Client on the Constrained UE (without MSGin5G Client). The same MSGin5G UE can also deliver the received MSGin5G message towards the target Application Client on the Constrained UE (without MSGin5G Client).

MSGin5G Group: the group of UEs which members may be MSGin5G UE, Legacy 3GPP UE and Non-3GPP UE.

MSGin5G message: the message defined in the present specification that is exchanged between the MSGin5G Service endpoints under the MSGin5G Service.

MSGin5G Proxy UE: an MSGin5G UE which constructs and sends MSGin5G message upon receiving MSGin5G message from the MSGin5G Client on the Constrained UE. The same MSGin5G UE can also deliver the received MSGin5G message towards the target MSGin5G Client on the Constrained UE.

MSGin5G Relay UE: an MSGin5G UE which receives MSGin5G message from Constrained UE (with MSGin5G client) and forwards it to the MSGin5G Server and vice-versa.

MSGin5G Server: a server in MSGin5G Service that receives and delivers MSGin5G messages among MSGin5G Service endpoints.

MSGin5G Service: an MNO message service using the 5G System that enables Point- to-Point, AS-to-Point, Point-to-AS, Group and Broadcast message delivery for thing-to-thing communication and person-to-thing communication.

Messaging Topic: an identifier for a topic to which a UE or an Application Server can subscribe to in order to receive messages that are characterized by a Message Topic.

MSGin5G UE: the UE that uses MSGin5G Client in MSGin5G Service.

Non-3GPP Message Gateway: the entity in MSGin5G Service to support interworking with Non-3GPP UEs.

Non-3GPP UE: the UE that supports non-3GPP message sending and receiving (e.g. RCS message as specified in GSMA PRD RCC.07 [3], OMA LWM2M message as specified in OMA OMA-ERELD-LightweightM2M [4]) in MSGin5G Service.

NOTE: The MSGin5G UE utilizes MSGin5G Client in MSGin5G Service. The Legacy 3GPP UE and Non-3GPP UE does not utilize MSGin5G Client in MSGin5G Service.

Non-MSGin5G UE: general terminology for Legacy 3GPP UE or Non-3GPP UE.

Point-to-AS messaging: an MSGin5G message delivery that is originated at a UE and terminated at an Application Server.

Point-to-Point messaging: an MSGin5G message delivery that originates at a UE and terminates at a UE, where at least one of the end points is an MSGin5G UE.

3.2 Symbols

For the purposes of the present document, the following symbols apply:

<symbol> <Explanation>

3.3 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].

5GS 5G System

AOMT AS-Originated Mobile-Terminated

AS Application Server

CAPIF Common API Framework for northbound APIs

MOAT Mobile-Originated AS-Terminated

MOMT Mobile-Originated Mobile-Terminated

NIDD Non IP Data Delivery

SCEF Service Capability Exposure Function

SCS Service Capability Server

SEAL Service Enabler Architecture Layer for Verticals

SMSC Short Message Service Center

VAL Vertical Application Layer