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3GPP is standardising the 5th generation of mobile telecommunications system (5G). The first operational version of the 3GPP 5G standards has been delivered in Release 15. It supports different deployment scenarios, the most prominent ones being:

  • Non-Standalone (NSA) Option3: also known as EN-DC, with 4G LTE/EPC acting as the master carrier and 5G radio (NR) providing additional carrier(s) for high throughput operation.
  • Standalone (SA) Option2: the ‘real’ 5G, using a new 5G core network (5GC) on top of the new 5G radio (NR).

Together with the core specifications, 3GPP also specifies and delivers a set of conformance test specifications, aimed at ensuring that any implementation of the 3GPP mobile technologies is compliant with the 3GPP core specifications.

The first set of 5G conformance test specifications have been produced by 3GPP, with main focus on the User Equipment (UE) testing. Together with the test specification documents, 3GPP also provides a reference standardised implementation of the conformance test cases developed in TTCN-3 language.

This TTCN-3 implementation is tested and verified using real UEs and real (hardware) network simulators. It is subsequently used by certification organisation to certify 5G-compliant UEs.

The Test specifications and related documents are available via 3GPP 5G test specs.

TTCN-3 edition 2019 published

The TTCN-3 edition 2019 (v4.11.1) has been published by ETSI. You have access via TTCN-3 Standards or the updated Quick Reference Card.

New or updated definitions in part 1 (core notation) include:

  • Control part replaced by control function: 8.0, 8.3, 26, 26.2
  • Test case invocation and control component: 16.3, 26.3
  • altstep with interleave functionality (named interleave): 16.2.0
  • call test component (start with blocking): 21.3.10
  • qualified form of enum values: 6.2.4
  • module parameter templates: 8.2.1
  • @deterministic for formal parameter and variables: 5.4.1,, 11.1, 11.2
  • @deterministic for templates: 15.3, 15.5
  • @control for functions and altsteps: 16.1, 16.1.3, 16.1.5, 16.2
  • catch any exception for specific signature: 22.3.6

Please note, that some of the deprecated feature have been now removed from the standard: Recursive Import, Sizeoftype, external constants, prefixing enumerated values, record of/arrays being compatible with records, UCS-2 predefined predefined variant attribute, prefixing local definitions with module identifiers, matching incompatible types.

UCAAT 2019

ETSI's user conference on Advanced Automated Testing (UCAAT 2019) will be hosted in Bordeaux in October 2019. This conference is the perfect location to discuss the future evolution of TTCN-3. You may submit your recent experiences and work around TTCN-3 for presentation. Please follow UCAAT 2019.

TTCN-3 Object-Oriented Features

The new TTCN-3 language extension Object-Oriented Features has been finalized and published as ETSI ES 203 790. You may access the document via the TTCN-3 Standards webpage or the latest TTCN-3 Quick Reference Card. An initial introduction to the OO features have been presented at UCAAT: see poster (2017) or slides by Kristóf Szabados (2018).

TDL mapping to TTCN-3

ETSI TC MTS published the final version for the mapping of the Test Description Language (TDL) to TTCN-3. You may find the document here. For further information on TDL please vistit the TDL homepage.

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