4 Overview

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

4.1 Test Methodology

4.1.1 Testing of optional functions and procedures

Any function or procedure which is optional, as indicated in the present document may be subject to a conformance test if it is implemented in the UE.

A declaration by the apparatus supplier (Implementation Conformance Statement (ICS)) is used to determine whether an optional function/procedure has been implemented (see ISO/IEC 9646-7 [13] for general information about ICS).

4.2 Implicit Testing

For some 3GPP signalling and protocol features conformance is not verified explicitly in the present document. This does not imply that correct functioning of these features is not essential, but that these are implicitly tested to a sufficient degree in other tests.

4.3 Conformance Requirements

The Conformance Requirements clauses in the present document are copy/paste from the relevant core specification where skipped text has been replaced with "…". References to clauses in the Conformance Requirements clause of the test body refers to clauses in the referred specification, not clauses in the present document.