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TTCN-3 (Testing and Test Control Notation version 3) is a strongly typed test scripting language used in conformance testing of communicating systems and a specification of test infrastructure interfaces that glue abstract test scripts with concrete communication environments. TTCN-3 has been developed by ETSI and its predecessor is TTCN-2. Despite sharing some fundamental concepts, TTCN-2 and TTCN-3 are essentially two different languages, the latter having simpler syntax and standardized adapter interfaces. TTCN-3 scripts can be combined with ASN.1, IDL and XML type definitions. ASN.1 is natively supported by major TTCN-3 tool vendors.


TTCN-3 has been used to deploy SIP, WiMAX, and DSRC test systems.

The Open Mobile Alliance adopted in 2008 a strategy of using TTCN-3 for translating some of the test cases in an enabler test specification into an executable representation.[1]

The AUTOSAR project promoted (2008) the use of TTCN-3 within the automotive industry.[2]

The 3GPP project promoted the use of TTCN-3 within the mobile industry.[3]


A typical TTCN-3 test system consists of:

  • execution core that runs test cases (TE or test execution)
  • SUT adapter implementing TRI SA interface that is responsible for network interface code
  • platform adapter implementing TRI PA interface that is responsible for timers and external functions
  • coding and decoding (TCI-CD interface)
  • test control interface that uses TCI-TM API

See also[edit]


  1. ^ TTCN-3 Test Code Developments - Request for Information, May 1, 2008, Open Mobile Alliance, retrieved on May 7, 2008
  2. ^ TTCN-3 application areas, ETSI official TTCN-3 web site, retrieved on Nov 17, 2015
  3. ^ 3GPP RAN5 Mobile Competence Centre

External links[edit]