C.2 Generic Registration Test Procedure – IMS security – UMTS/EPS

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. EPS bearer context activation according annex C.18 for UE with E-UTRA support (TS 34.229-2 A.18/1). PDP context activation according annex C.17 for UE with UTRA support (TS 34.229-2 A.18/2) only.

3. Optional P-CSCF address discovery using the DHCP procedure according to Annex C.3 for IPv6 or Annex C.4 for IPv4.

4. The UE initiates IMS registration. SS waits for the UE to send an initial REGISTER request.

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

6. The SS waits for the UE to set up a temporary set of security associations and to send another REGISTER request, over those security associations.

7. The SS responds to the second REGISTER request with valid 200 OK response, sent over the same temporary set of security associations that the UE used for sending the REGISTER request.

8. The SS waits for the UE to send a SUBSCRIBE request over the newly established security associations.

9. The SS responds to the SUBSCRIBE request with a valid 200 OK response.

10. The SS sends a valid NOTIFY request for the subscribed registration event package.

11. 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				Annex C.17 or C.18.
2				Void.
3				Optional P-CSCF address discovery using the DHCP procedure according to Annex C.3 for IPv6 or Annex C.4 for IPv4.
4	🡪		REGISTER	The UE sends initial registration for IMS services.
5	🡨		401 Unauthorized	The SS responds with a valid AKAv1-MD5 authentication challenge and security mechanisms supported by the network.
6	🡪		REGISTER	The UE completes the security negotiation procedures, sets up a temporary set of SAs and uses those for sending another REGISTER with AKAv1-MD5 credentials.
7	🡨		200 OK	The SS responds with 200 OK.
8	🡪		SUBSCRIBE	The UE subscribes to its registration event package.
9	🡨		200 OK	The SS responds with 200 OK.
10	🡨		NOTIFY	The SS sends initial NOTIFY for registration event package, containing full registration state information for the registered public user identity in the XML body
11	🡪		200 OK	The UE responds with 200 OK.

NOTE 1: The default message contents in annex A are used with conditions according to scenario and UE capabilities and, in addition,
Step 4 REGISTER uses conditions A1 and A31
Step 6 REGISTER uses conditions A2 and A31
Step 8 SUBSCRIBE uses condition A1 and A6.

NOTE 2: The procedure described in C.5 on PUBLISH requests can happen in parallel to above steps 8-11.