A.27 Leaving a conference / 5GS

34.229-53GPPInternet Protocol (IP) multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP)Part 5: Protocol conformance specification using 5G System (5GS)Release 16TSUser Equipment (UE) conformance specification

Expected sequence

Step	Direction		Message	Comment
	UE	SS
1	->		BYE	The UE leaves the conference with BYE
2	<-		200 OK	The SS sends 200 OK for BYE
3	<-		NOTIFY	Conditional: if the UE had subscribed to the conference event package, the SS notifies the UE that its subscription to conference event package is terminated
4	->		200 OK	Conditional: the UE sends 200 OK for NOTIFY (if sent by SS)

Specific Message Contents

BYE

Use the default message “BYE” in Annex A.2.8 of TS 34.229-1 [2], applying condition A8, with the following exceptions:

Header/param	Value/remark
Request-Line
Request-URI	sip:final@conf-factory appended with px_IMS_HomeDomainName

200 OK (Step 2)

Use the default message “200 OK for other requests than REGISTER or SUBSCRIBE” in Annex A.3.1 of TS 34.229-1 [2], applying condition A22.

NOTIFY

Use the default message “NOTIFY for conference event package” in Annex A.5.3 of TS 34.229-1 [2], applying condition A4.

200 OK (Step 4)

Use the default message “200 OK for other requests than REGISTER or SUBSCRIBE” in Annex A.3.1 of TS 34.229-1 [2], applying condition A22.