C.23 Procedure to register another IMPU over existing SAs

34.229-13GPPInternet Protocol (IP) multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP)Part 1: Protocol conformance specificationRelease 16TSUser Equipment (UE) conformance specification

The generic test procedure:

1 The UE initiates IMS registration for the new IMPU. SS waits for the UE to send an initial REGISTER request over the existing set of IPSec SAs.

2 The SS responds to the initial REGISTER request with a valid 401 Unauthorized response.

3 The SS waits for the UE to send another REGISTER request, over the existing security associations.

4 The SS responds to the second REGISTER request with valid 200 OK response

5 The SS sends a NOTIFY request for the registration event package.

6 The SS waits for the UE to respond to the NOTIFY with a 200 OK response.

Expected sequence

Step	Direction		Message	Comment
	UE	SS
1	🡪		REGISTER	The UE sends initial registration for the new IMPU over the existing IPSec SAs
2	🡨		401 Unauthorized	The SS responds with a valid AKAv1-MD5 authentication challenge
3	🡪		REGISTER	The UE sends another REGISTER with AKAv1-MD5 credentials.
4	🡨		200 OK	The SS responds with 200 OK.
5	🡨		NOTIFY	The SS sends a NOTIFY for registration event package, containing partial registration state information for the newly registered public user identity in the XML body
6	🡪		200 OK	The UE responds with 200 OK.

NOTE: The default message contents in annex A are used apart from the XML body in step 5. The body shall be specified within the test case referring to this procedure.