4.9.19 Test procedure for IMS MO SMS in 5GC

38.508-13GPP5GSPart 1: Common test environmentRelease 17TSUser Equipment (UE) conformance specification

4.9.19.1 Scope

The purpose of this procedure is to transmit an IMS MO SMS.

4.9.19.2 Procedure description

4.9.19.2.1 Initial conditions

System Simulator:

– 1 NR Cell connected to 5GC, default parameters.

User Equipment:

– The UE is in state 1N-A and registered to the IMS.

4.9.19.2.2 Procedure sequence

Table 4.9.19.2.2-1: IMS MO SMS in 5GS

St	Procedure	Message Sequence		TP	Verdict
		U – S	Message
1	Make the UE attempt an IMS MO SMS	–	–	–	–
2	The UE transmits an RRCSetupRequest message with ‘establishmentCause’ set to ‘mo-SMS’.	–>	NR RRC: RRCSetupRequest	–	P
3	The SS transmits an RRCSetup message.	<–	NR RRC: RRCSetup	–	–
4	The UE transmits an RRCSetupComplete message to confirm the successful completion of the connection establishment and to initiate the session management procedure by including the SERVICE REQUEST message.	–>	NR RRC: RRCSetupComplete 5GMM: SERVICE REQUEST	–	P
5	The SS transmits a SecurityModeCommand message to activate AS security.	<–	NR RRC: SecurityModeCommand	–	–
6	The UE transmits a SecurityModeComplete message and establish the initial security configuration.	–>	NR RRC: SecurityModeComplete	–	P
7	The SS transmits an RRCReconfiguration message and a SERVICE ACCEPT message to establish SRB2 and DRB(s).	<–	NR RRC: RRCReconfiguration 5GMM: SERVICE ACCEPT	–	–
8	The UE transmits an RRCReconfigurationComplete message.	–>	NR RRC: RRCReconfigurationComplete	–	P
9-16	The steps 1-8 from the expected sequence defined in Annex A.13 of TS 34.229-5 [47] of IMS MO SMS / 5GS take place.	–	–	–	–

4.9.19.3 Specific message contents

Table 4.9.19.3-1: RRCSetupRequest (step 2, Table 4.9.19.2.2-1)

Table 4.9.19.3-2: SERVICE REQUEST (step 4, Table 4.9.19.2.2-1)