7.5 MTSI MO Voice Call without preconditions at both originating UE and terminating UE / 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

7.5.1 Test Purpose (TP)

(1)

with { UE being registered to IMS and configured to not use preconditions }

ensure that {

when { UE is being made to initiate a voice call }

then { UE sends INVITE for voice call without preconditions }

}

(2)

with { UE having sent INVITE without preconditions }

ensure that {

when { UE receives 183 Session Progress without preconditions }

then { UE sends PRACK for 183 Session Progress }

}

(3)

with { UE having sent PRACK }

ensure that {

when { UE receives 200 OK for PRACK followed by 180 Ringing followed by 200 OK for INVITE }

then { UE sends ACK }

}

7.5.2 Conformance Requirements

The conformance requirements covered in the present test case are, unless otherwise stated, Rel-15 requirements.

As described in 7.4.2 except:

[TS 24.229, clause 5.1.3.1]:

The "integration of resource management and SIP" extension is hereafter in this subclause referred to as "the precondition mechanism" and is defined in RFC 3312 [30] as updated by RFC 4032 [64].

The preconditions mechanism should be supported by the originating UE.

If the precondition mechanism is disabled as specified in subclause 5.1.5A, the UE shall not use the precondition mechanism.

[TS 24.229, clause 5.1.5A]:

The precondition disabling policy indicates whether the UE is allowed to use the precondition mechanism or whether the UE is not allowed to use the precondition mechanism.

If the precondition disabling policy is not configured, the precondition disabling policy is assumed to indicate that the UE is allowed to use the precondition mechanism.

The UE may support the precondition disabling policy.

If the UE supports the precondition disabling policy, the UE may support being configured with the precondition disabling policy using one or more of the following methods:

a) the Precondition_disabling_policy node of the EFIMSConfigData file described in 3GPP TS 31.102 [15C];

b) the Precondition_disabling_policy node of the EFIMSConfigData file described in 3GPP TS 31.103 [15B]; and

c) the Precondition_disabling_policy node of 3GPP TS 24.167 [8G].

If the UE is configured with both the Precondition_disabling_policy node of 3GPP TS 24.167 [8G] and the Precondition_disabling_policy node of the EFIMSConfigData file described in 3GPP TS 31.102 [15C] or 3GPP TS 31.103 [15B], then the Precondition_disabling_policy node of the EFIMSConfigData file shall take precedence.

NOTE: Precedence for files configured on both the USIM and ISIM is defined in 3GPP TS 31.103 [15B].

The precondition mechanism is disabled, if the UE supports the precondition disabling policy and the precondition disabling policy indicates that the UE is not allowed to use the precondition mechanism.

The precondition mechanism is enabled, if:

1) the UE does not support the precondition disabling policy; or

2) the UE supports the precondition disabling policy and the precondition disabling policy indicates that the UE is allowed to use the precondition mechanism.

[TS 24.229, clause 6.1.2]:

An INVITE request generated by a UE shall contain a SDP offer and at least one media description. This SDP offer shall reflect the calling user’s terminal capabilities and user preferences for the session.

…

NOTE 2: If the originating UE does not use the precondition mechanism (see subclause 5.1.3.1), it will not include any precondition information in the SDP message body.

7.5.3 Test description

7.5.3.1 Pre-test conditions

System Simulator:

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

UE:

– UE contains either ISIM and USIM applications or only USIM application on UICC.

– UE is configured to register for IMS after switch on.

– The UE is configured to not use preconditions.

Preamble:

– The UE is in test state 1N-A (TS 38.508-1 [21]) and registered to IMS.

7.5.3.2 Test procedure sequence

Table 7.5.3.2-1: Main Behaviour

St

Procedure

Message Sequence

TP

Verdict

U – S

Message

1

UE is made to attempt an IMS voice call.

–

–

–

–

1A-1F

Steps 2-7 of generic procedure specified in Table 4.9.15.2.2-1 of TS 38.508-1 [21] are performed.

–

–

–

–

–

EXCEPTION: In parallel with Step 2, parallel behaviour defined in table 7.5.3.2-2 takes place

–

–

–

–

2

Step 1 of Annex A.4.2 happens

–>

INVITE

1

P

3

Step 2 of Annex A.4.2 happens

<–

100 Trying

–

–

4

Step 3 of Annex A.4.2 happens

<–

183 Session Progress

–

–

5

Step 4 of Annex A.4.2 happens

–>

PRACK

2

P

6

Step 5 of Annex A.4.2 happens

<–

200 OK

6A-6C

Steps 10-12 of generic procedure specified in Table 4.9.15.2.2-1 of TS 38.508-1 [21] are performed.

–

–

–

–

7

Step 6 of \Annex A.4.2 happens

<–

180 Ringing

–

–

8

Step 7 of Annex A.4.2 happens

<–

200 OK

–

–

9

Step 8 of Annex A.4.2 happens

–>

ACK

3

P

Table 7.5.3.2-2: Parallel behaviour

St

Procedure

Message Sequence

TP

Verdict

U – S

Message

1

The UE transmits an RRCReconfigurationComplete message.

–>

NR RRC: RRCReconfigurationComplete

–

–

7.5.3.3 Specific message contents

None as fully described in annex A.4.2.