Community News

TTCN-3 edition 2020 published

Final drafts of the TTCN-3 edition 2020 have been approved in April and published in May 2020. You have access and may read the documents via the ETSI Search & Browse webpage and/or the updated TTCN-3 quick reference card. Some of the new improvements are given in the following:

Support for TTCN-3 core language

  • @nodefault alt statements
  • New template-kind-cast operators omit() and present()
  • Formal parameters of type ‘any’ for external functions
    • Type ‘any’ in general for non-standard-conform TTCN-3
  • Map types
  • @abstract templates
  • Improvement for generic external functions (with generic result)

Support for object-oriented package

  • Implicit constructors
  • Mixed classes
  • Nested classes
  • Generic classes

Support for advanced parameterization

  • Nested type expressions as generic actual parameters

TTCN-3 Conformance ATS 2020

ETSI TC Methods for Testing and Specification (MTS) published the latest version of its TTCN-3 Conformance Test Suite. You may access the documents and the TTCN-3 test cases via the TTCN-3 Conformance Test Suites webpage.

TTCN-3 repositories moved to Git

The public ETSI TTCN-3 test suites moved from SVN to Git repositories. You may access the tests now via ETSI Test Suites and Libraries or directly at


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.

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