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Program:

31 August 2001
0 09:00-09:30 Overview of SG 7 work H. Bertine
(Lucent Technologies, U.S.A.)
SG 10 overview on Telecommunication Languages and Software A. Sarma
(NEC, Germany)
1 09:30-10:25 ASN.1
ASN.1, the solution for efficient communication between systems O. Dubuisson
(France Télécom, France)
Use of ASN.1 for protocol specification, with some recent developments J. Larmouth
(ISO, UK)
Summary:

ASN.1 is a platform and a language independent notation for specifying communication protocols. It enables implementations to be undertaken easily on any computer system using languages such as C, C++ and Java. It is a proven technology that is widely used in many different industry sectors. It enables rapid definition and implementation of communication protocols. It can provide an extremely compact representation of messages when required for low-bandwidth applications. Recent developments enable ASN.1 tools to interact with XML tools (including browsers), and to display ASN.1 values in any very human-readable form. Development of "encoding control notation" enables ASN.1 to be applied to protocols hitherto defined in ordinary English with tables (for example, Bluetooth). It also has strong links to testing methodologies and to the modeling of computer communications.
Quality Tools for ASN.1 B. Scott
(OSS Nokalva, USA)
Summary:

This presentation focuses on the benefits of ASN.1 and the ease of implementation with the amount of quality tools available today.
ASN.1 Compiler for text-based protocols! K. Govindan
(WIPRO, India)
Summary:

ASN.1 (Abstract Syntax Notation one) is an international standard that provides protocol developers the ability to unambiguously describe information that will be exchanged independent of the way the information is represented on each of the communicating systems.

ASN.1 Compiler is a tool to generate routines to encode/decode messages specified in an ASN.1 Specification File. The ASN.1 Compiler that Wipro Technologies has developed comprises of a Front End, which parses the ASN.1 Specification file to generate a table and header file. The table generation is a one-time effort that needs to be re-generated only if the Specification File changes. The table created thus can be stored in a file for reference by Back End. The Back End comprises of generic encode/decode functions, which use the table generated by Front End. The encoded byte stream can be sent on a communication channel set up by the lower layers in the stack of communication protocols. This unique approach resulted in a very minimal footprint size. The Back End size is 40K. The size of table generated by the Front End for H245 version 2 is 7K. In total, ASN.1 takes a maximum of 50K making it suitable for embedded applications. A case study is presented towards the end of this paper describing how text-based protocols can benefit by converging to binary-based protocols with the help of efficient ASN.1 tools.
Coffee Break: 10:25 - 10:50
2 10:55-11:40 SDL
SDL R. Reed
(TSE Limited, U.K.)
Summary:

SDL is the ITU "Specification and Description Language" as defined by ITU-T Recommendation Z.100. It is a graphical notation with a formally defined meaning used for specification of systems, the design and implementation of systems and the standardization of protocols and services. SDL can be used to give descriptions of the behaviour of systems at various levels. It can be used to give a service overview, or by describing a model in more details, for direct generation of executable software. The presentation covers the main aspects of SDL: structure, behaviour, interfaces, data and types. It includes some of the latest features in SDL-2000, together with some insight into possibilities for further improving system engineering where SDL is usually used for a definitive behaviour model in combination with ASN.1 (see ITU-T Recommendation Z.105), MSC and TTCN. The overall modeling process is also considered, which includes the overlap with UML as covered by ITU-T Recommendations Z.109 and (part of) Z.100. SDL-2000 provides object modeling, hierarchical state diagrams, nested processes and data objects with methods. How SDL may need to be changed as engineering environments and products evolve is considered, and is the subject of the ongoing study of Recommendation Z.100.
SDL relevance to protocol/telecom application development: a case study B. Rao
(Motorola, India)
Summary:

In general telecom applications are very complex, goes through multiple layers to provide different levels of abstractions and communicates with various modules to provide reliable and cost effective services. Designing and maintaining these applications are a big challenge for even major companies. The design and maintenance of such applications have become simple after the invention of languages like SDL, TTCN, MSC etc. They not only simplified the understanding and design, but also showed the way for code generation from design. 
This presentation covers the usage of SDL, MSC, Code Generation etc. for the development of a simple case study on "Sliding Window Protocol". It also demonstrates on how to add new features to the existing system and also brings the experiences of MIEL (Motorola India Electronics Pvt. Ltd). 
MIEL, is using these languages and methodology for the last 6 years in different projects and found that these languages add more value for the development of infrastructure software, testing of subscriber/infrastructure software etc. It also found that there is a need for the optimization of the code generators for increasing the overall usage the languages and effectiveness.
3 11:40-12:25 TTCN
TTCN-edition 3 A. Sarma
(NEC, Germany
)
Summary:

With edition 3, TTCN - the tree and tabular combined notation - now has become more powerful as a testing suite. The talk addresses the rationale behind TTCN, the evolution from edition 2 to edition 3, and addresses how TTCN is used in standards work, such as in ITU-T, at ETSI and in 3GPP. It points at the advantages of using a standard testing language. The new edition TTCN-3 is itself split into a "core" language (ITU-T Recommendation Z.140) and into several presentation formats (ITU-T Recs. Z.141, Z.142, ....), allowing a choice e.g. between textual and graphical presentation. The talk also addresses conformance testing issues as dealt with in ITU-T Study Groups 7 and 10.
Basic TTCN, TTCN-3 and conformance testing A. Krishnamoorthy
(Cognizant, India)
The presentation would be to emphasize on the following topics:
  • basic concepts and the history of TTCN;
  • meaning of conformance testing;
  • description of TTCN-3;
  • comparison between earlier versions of TTCN and TTCN-3,
  • the major capabilities of TTCN-3;
  • the different kinds of testing that TTCN-3 can perform.
4 12:25-12:45 MSC
Message Sequence Charts C. Jervis
(Motorola, U.K.)
Summary:

An overview of the ITU-T Recommendation Z.120 language Message Sequence Charts (MSC) will be presented, which will cover new and expressive features including timing constraints, open data interface, and decomposition. Focus will also be given to the beneficial use of MSC within the development lifecycle, ranging from requirements specification, execution tracing, and test specification, particularly with regard to other ITU-T languages. We shall also present some open topics under study in the ongoing development of Recommendation Z.120.
Lunch Break: 12:45 - 14:00
5 14:00-14:30 VoIP
VoIP Signalling Protocols Framework N. Rajagopal
(MindTree, India)
Summary:

The rapid advances made in the IP telephony in recent times has helped to realize the promise of cheaper high quality voice calls. New architectures like softswitches and function decomposition are being developed to address the evolving challenges. To address the varied requirements of IP telephony, standards bodies like ITU, IETF are developing standards and protocols like MGCP, SIP, MeGaCo, H.323 and SIGTRAN. This paper compares the proposed standards, their background, their place in the evolving next generation IP telephony network, the ease of implementation and interop issues.
14:30-14:50 The industrial rationale for using ITU languages and methods O. Hydbom
(Telelogic AB, Sweden)
 
6 14:50-15:35 Middleware
MiddlewareA. Meisingset
(Telenor, Norway)
Summary:

The speech will present the standardization of middleware for telecommunication applications with emphasis on standardization of Distributed Object Technologies within ITU.
The importance of Middleware in today's application development S. Sadagopan
(Indian Institute of Information Technology, India)
Summary:

In an increasingly "connected" world, most applications have started to use the Internet as the delivery vehicle. Naturally most applications are getting "web-enabled". This has led to a layering of the software into presentation, middleware and backend database layers that have fundamentally changed the architecture of application development (beyond the simple notion of client server computing). With many applications becoming "mission critical", transaction processing, persistence, scalability and recovery are mandatory - properties that are NOT satisfied by simple web servers using HTML protocol. This talk would address the key issues of Middleware, their architecture, performance issues, leading products and application development challenges.
7 15:35-16:05 Directory
Directories E. Andersen
(Tele Danmark A/S, Denmark)
Summary:

Directories are system for storing and retrieving information about objects of any kind, for example, people, organisations, institutions, etc., but it can also be network components, Web services, trading partners, etc. Directories are characterised by extensive search capabilities. Directories are used for White Pages services, Yellow Pages services, for use in Public Key Infrastructures, for storing Business-to-Business information, etc.

The ITU-T X.500 Series of Recommendations is the most comprehensive directory specification. The 4th edition has just been completed and there is substantial and important work in progress. The ITU-T Rec. E.115 specifies a rather simple protocol for Directory Assistance for telephone operators. ITU-T Rec. F.510 is a service specification for a future White Pages service to support present requirements. A replacement to ITU-T Rec. 115 is currently being progressed, building on the experiences from X.500.
Coffee Break: 16:05-16:35
8 16:35-17:05 Security
Multimedia watermarking in enhancing digital securityA. De
(Hughes Software Systems, India)
Summary:

The surge of digital technology in every front makes development of reliable and robust methods for protecting text, audio, image and video a matter of prime urgency. This presentation discusses methods to embed and extract digital watermark into and from audio/video streams. Digital watermarking is an emerging technology to prevent digital media from illegal distribution by embedding the copyright information and user identification into the original media. A watermark inside audio/video should be inaudible/invisible; and robust to different kinds of attacks and collisions. This talk will introduce the underlying idea behind watermarking, different techniques of implementation, challenges associated with the concept and its business significance. With the advent of internet technology, digital compressed audio and video distribution gets faster and more convenient. We’ll discuss several watermarking schemes applied to uncompressed as well as compressed audio/video streams. We’ll illustrate these concepts with practical examples and demonstrate how user tag information is hidden inside the audio/video/text without affecting quality. We’ll highlight advances in the related field, such as public key watermarking, steganography and so on. We’ll conclude the presentation by touching upon standardization efforts in the area of multimedia watermarking.
9 17:05-17:35 E-commerce
E-Commerce for Developing Countries (EC-DC)K. Mirsky
(ITU-D)
 
10 17:35-18:00 Open Session and conclusions, All speakers & participants
 


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