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The ITU-T Language Family and other general software is s ues

Study Group 10 of ITU-T is responsible for technical languages, their usage, and software aspects of telecommunication systems. This article discusses the ITU-T language family, core properties, co-operation with other groups, language usage in standards, and future challenges.

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The ITU-T Language Family and other general software is s ues

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  1. The ITU-T Language Familyand other general software issues Amardeo SarmaChairman, ITU-T Study Group 10

  2. Mandate of Study Group 10 • Responsible for technical languages, the methods for their usage and other issues related to the software aspects of telecommunication systems. • Studies on modelling, specification and description techniques and on other software • SG10 is Lead Study Group on Languages and Description Techniques within ITU-T ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001

  3. The ITU-T language family (Current) • SDL - Specification & Description Language • ASN.1 - Abstract Syntax Notation One • MSC - Message Sequence Chart • TTCN Tree and Tabular Combined Notation • ODL - Object Definition Language • IDL – Interface Definition Language • CHILL - CCITT HIgh-Level Language • GDMO – Guidelines for the definition of managed objects Besides SG10, SG7, SG4 and ISO involved ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001

  4. The ITU-T language family (new) • DCL - Distribution and Configuration Language • URN - User Requirements Notation • Incorporating Time and Performance into the languages ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001

  5. Core properties of ITU-T Languages • Geared towards real-time, distributed communicating systems • Strong focus on formal basis, allowing early verification and validation • Many languages with a graphical syntax • Commercial tool support • Tool availability required for approval • Tools vendors directly involved in work • SG 10 Policy: Strong coupling with use in standards and industrial needs and use ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001

  6. Other Study Group 10 issues • Quality • Quality of Protocol-related Recommendations • Quality assurance • Methodology • Chain for Software development • Use in standards • Middleware ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001

  7. SG7 SG10 Co-operationvia joint experts Policy of active co-operation Methods for Testing and Specification ISO ETSI MTS ACTS EURESCOM IETF Universities ITU-T SG17 Vendors TINA-C SDL Forum OMG SDL Forum Society Users Consultants ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001

  8. Results of Use of Languages • New Z-Series Recommendations: • SDL, MSC, ODL, CHILL • UML with SDL, SDL with ASN.1 • Standards • ITU-T, ETSI, 3GPP, ISO/IEC JTC1 • Some use in IEEE, ATM Forum, IETF • Industry (Software Development) • Telco Product development • New: Aviation and Automotive ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001

  9. ITU-T Languages in Standards • Previous: • OSEK, Automotive "vehicle area network":(SDL, MSC) • ARINC 422 etc. - Avionics : (SDL, MSC) • GSM, DECT, ISO/IEC JTC1 • ITU-T: X, Q, I, H and T series • Ongoing: • 3GPP - RAN + CN: (ASN.1, SDL, MSC, TTCN) • BRAN Data Link Control: (All) • ATM Forum: (TTCN) • Bluetooth: (primarily TTCN) • IEEE-1394: (MSC, TTCN and SDL under consideration) • IETF: OSPF (SDL), several RFCs (ASN.1) ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001

  10. Key Challenges Ahead • Integrating ITU-T and non-ITU languages and methods, thereby providing various mixes adapted to user needs • Expanding further into the Internet and mobility area, e.g. for protocols • Breaking into new application areas beyond telecommunications • Strengthening Quality and General Software issues, such as Methodology ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001

  11. More Information • http://www.itu.int • http://www.sdl-forum.org • http://www.asn1.org • http://asn1.elibel.tm.fr • Text books on SDL, ASN.1 and MSC • Contact me: sarma@ccrle.nec.de ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001

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