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Author: A. Olsen
Publisher: Newnes
ISBN: 0444598901
Category : Computers
Languages : en
Pages : 480
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Book Description
CCITT (now ITU-T) Specification and Description Language (SDL) and systems engineering (formal and informal) in SDL are considered in this publication. The latest version of the language, SDL-92 [ITU Z.100 SDL-92] is introduced. The book has been written for existing and potential users of SDL - technologists involved in the specification and engineering of systems. It offers easier learning, through examples and application, than the Z.100 Recommendation of March 1993, which gives precise technical definitions and concepts. The book has sufficient coverage of the language so that for normal use it should not be necessary to consult Z.100. For this reason, the grammars, both textual and graphical, are included, and the index makes it possible to find text on most of the language mechanisms. Chapter 1 provides an overview of specification and design of telecommunication systems. It considers the usage and scope of SDL. Chapter 2 gives an overview of the language, with an introduction of the major language elements. Chapter 3 focuses on the specification of behaviour and the information interchange between processes. Chapter 4 covers the structuring of systems in terms of instances, how these may be defined by types and how types may be organised in type/subtype hierarchies by inheritance. Parameterised types and packages of type definitions are also covered. Chapter 5 presents the part of the language that provides data types, with emphasis placed on how to use predefined data types. Chapter 6 presents the use of SDL for system engineering, with a discussion of general systems engineering principles followed by an introduction to methodologies which use SDL. The use of other languages in combination with SDL, documentation issues, naming and other lexical rules, errors and language support are considered, since they are more relevant to the use of language in engineering than when initially learning the language.
Author: A. Olsen
Publisher: Newnes
ISBN: 0444598901
Category : Computers
Languages : en
Pages : 480
Get Book Here
Book Description
CCITT (now ITU-T) Specification and Description Language (SDL) and systems engineering (formal and informal) in SDL are considered in this publication. The latest version of the language, SDL-92 [ITU Z.100 SDL-92] is introduced. The book has been written for existing and potential users of SDL - technologists involved in the specification and engineering of systems. It offers easier learning, through examples and application, than the Z.100 Recommendation of March 1993, which gives precise technical definitions and concepts. The book has sufficient coverage of the language so that for normal use it should not be necessary to consult Z.100. For this reason, the grammars, both textual and graphical, are included, and the index makes it possible to find text on most of the language mechanisms. Chapter 1 provides an overview of specification and design of telecommunication systems. It considers the usage and scope of SDL. Chapter 2 gives an overview of the language, with an introduction of the major language elements. Chapter 3 focuses on the specification of behaviour and the information interchange between processes. Chapter 4 covers the structuring of systems in terms of instances, how these may be defined by types and how types may be organised in type/subtype hierarchies by inheritance. Parameterised types and packages of type definitions are also covered. Chapter 5 presents the part of the language that provides data types, with emphasis placed on how to use predefined data types. Chapter 6 presents the use of SDL for system engineering, with a discussion of general systems engineering principles followed by an introduction to methodologies which use SDL. The use of other languages in combination with SDL, documentation issues, naming and other lexical rules, errors and language support are considered, since they are more relevant to the use of language in engineering than when initially learning the language.
Author: Roberto Saracco
Publisher: North Holland
ISBN:
Category : Computers
Languages : en
Pages : 660
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Book Description
SDL (the Specification and Description Language for Telecommunication Systems) has evolved into a fully-fledged tool for the specification of telecommunication (sub-)systems, and is proving its fitness for major applications. The current (1988) version, the subject of this book, is used in the specification of the Functional Reference Model for Integrated Broadband Communication being studied in RACE, the European Community R&D programme in Telecommunications. For the many potential users of SDL, whether in industry or in the operating companies, this book should be of great practical value. By using worked examples from actual telecommunications engineering practice, and by explaining conceptual choices as they are made, it will enable students to learn the many features of the language in coherent combinations, and thus inspire correct usage from an engineering point of view. I congratulate the authors on their initiative and wish their readers success in mastering this invaluable addition to the tools-of-the-trade. From the preface by Rudolf W. Meijer, Commission of the European Communities Directorate General Telecommunications, Information Industries and Innovation
Author: L. G. Bouma
Publisher: IOS Press
ISBN: 9789051991659
Category : Technology & Engineering
Languages : en
Pages : 292
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Book Description
Features are modifications to the control of telecommunications services. A feature interaction occurs when the behaviour of another, which can lead to unexpected or undesired behaviour, which affects the quality of service. The goal of this volume is to generate a combination of techniques through protocol engineering, software testing, formal techniques and AI and applications to telecommunications services.
Author: Kong E. Cheng
Publisher: IOS Press
ISBN: 9789051992380
Category : Technology & Engineering
Languages : en
Pages : 244
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Book Description
In an information society, heavily dependent on communications and distributed systems, feature interactions are likely to become an even more important problem than they are today. A particularly interesting issue, given the current work on agents, is whether feature interactions will be more likely in systems with many autonomous agents performing tasks. The current demand for better and more convenient communications requires development of a variety of new services as quickly as possible. As the number of services becomes larger, however, feature interactions create incompatibilities between the various functions needed to implement them. In developing telecommunication systems, we now spend huge numbers of person-hours on software modifications and testing whenever a new function is added. Much of this time is spent on detecting and eliminating problems arising from feature interaction. In the future, as ever more services are offered, feature interactions will become a major bottleneck in the development of software for telecommunications systems. This book presents opinions on the technical problems involved in feature interactions and definitions of features and feature interactions.
Author: James N. Martin
Publisher: CRC Press
ISBN: 0429612419
Category : Technology & Engineering
Languages : en
Pages : 309
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Book Description
Systems Engineering Guidebook: A Process for Developing Systems and Products is intended to provide readers with a guide to understanding and becoming familiar with the systems engineering process, its application, and its value to the successful implementation of systems development projects. The book describes the systems engineering process as a multidisciplinary effort. The process is defined in terms of specific tasks to be accomplished, with great emphasis placed on defining the problem that is being addressed prior to designing the solution.
Author: Joseph H. Yuen
Publisher: Springer Science & Business Media
ISBN: 1475749236
Category : Technology & Engineering
Languages : en
Pages : 615
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Book Description
The challenge of communication in planetary exploration has been unusual. The guidance and control of spacecraft depend on reliable communication. Scientific data returned to earth are irreplaceable, or replaceable only at the cost of another mission. In deep space, communications propagation is good, relative to terrestrial communications, and there is an opportunity to press toward the mathematical limit of microwave communication. Yet the limits must be approached warily, with reliability as well as channel capacity in mind. Further, the effects of small changes in the earth's atmosphere and the interplanetary plasma have small but important effects on propagation time and hence on the measurement of distance. Advances are almost incredible. Communication capability measured in 18 bits per second at a given range rose by a factor of 10 in the 19 years from Explorer I of 1958 to Voyager of 1977. This improvement was attained through ingenious design based on the sort of penetrating analysis set forth in this book by engineers who took part in a highly detailed and amazingly successful pro gram. Careful observation and analysis have told us much about limitations on the accurate measurement of distance. It is not easy to get busy people to tell others clearly and in detail how they have solved important problems. Joseph H. Yuen and the other contribu tors to this book are to be commended for the time and care they have devoted to explicating one vital aspect of a great adventure of mankind.
Author: Ed Brinksma
Publisher: Springer Science & Business Media
ISBN: 9783540627906
Category : Computers
Languages : en
Pages : 452
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Book Description
This book constitutes the refereed proceedings of the Third International Workshop on Tools and Algorithms for the Construction and Analysis of Systems, TACAS '97, held in Enschede, The Netherlands, in April 1997. The book presents 20 revised full papers and 5 tool demonstrations carefully selected out of 54 submissions; also included are two extended abstracts and a full paper corresponding to invited talks. The papers are organized in topical sections on space reduction techniques, tool demonstrations, logical techniques, verification support, specification and analysis, and theorem proving, model checking and applications.
Author: Richard Lai
Publisher: Springer Science & Business Media
ISBN: 1461555493
Category : Computers
Languages : en
Pages : 315
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Book Description
Communication protocols are rules whereby meaningful communication can be exchanged between different communicating entities. In general, they are complex and difficult to design and implement. Specifications of communication protocols written in a natural language (e.g. English) can be unclear or ambiguous, and may be subject to different interpretations. As a result, independent implementations of the same protocol may be incompatible. In addition, the complexity of protocols make them very hard to analyze in an informal way. There is, therefore, a need for precise and unambiguous specification using some formal languages. Many protocol implementations used in the field have almost suffered from failures, such as deadlocks. When the conditions in which the protocols work correctly have been changed, there has been no general method available for determining how they will work under the new conditions. It is necessary for protocol designers to have techniques and tools to detect errors in the early phase of design, because the later in the process that a fault is discovered, the greater the cost of rectifying it. Protocol verification is a process of checking whether the interactions of protocol entities, according to the protocol specification, do indeed satisfy certain properties or conditions which may be either general (e.g., absence of deadlock) or specific to the particular protocol system directly derived from the specification. In the 80s, an ISO (International Organization for Standardization) working group began a programme of work to develop formal languages which were suitable for Open Systems Interconnection (OSI). This group called such languages Formal Description Techniques (FDTs). Some of the objectives of ISO in developing FDTs were: enabling unambiguous, clear and precise descriptions of OSI protocol standards to be written, and allowing such specifications to be verified for correctness. There are two FDTs standardized by ISO: LOTOS and Estelle. Communication Protocol Specification and Verification is written to address the two issues discussed above: the needs to specify a protocol using an FDT and to verify its correctness in order to uncover specification errors in the early stage of a protocol development process. The readership primarily consists of advanced undergraduate students, postgraduate students, communication software developers, telecommunication engineers, EDP managers, researchers and software engineers. It is intended as an advanced undergraduate or postgraduate textbook, and a reference for communication protocol professionals.
Author: Manfred Broy
Publisher: Springer Science & Business Media
ISBN: 3540653090
Category : Computers
Languages : en
Pages : 360
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Book Description
Software engineering research has di?erent pro?les in Europe and North Am- ica.WhileinNorthAmericathere isalotofknowhowinthepractical,technical, and organizational aspects of software engineering, in Europe the work conc- trates more on foundations and formal modeling of software engineering issues. Bothapproacheshavetheirindividualstrengthsandweaknesses. Researchdriven solelyby practice insoftware engineering runs in the danger ofdevelopinginto a shallow ?eld failing to ?nd a solid scienti?c basis or to contribute substantially to the progress in software engineering. Work concentrating on formal aspects alone is in the danger of becoming too theoretical and isolated from practice so that any transfer into practical application will fail. Substantial progress in software engineering can be achieved, however, by bringing together pragmatic and foundational work in software engineering - search. This can provide a step towards a common scienti?c basis for software engineering that allows us to integrate the various research results, leading to fruitful synergetic e?ects. It will also help to identify critical research paths and to develop an adequate paradigm for the scienti?c discipline of software en- neering. In software and systems engineering it is necessary to distinguish the en- mous di?erence between the dynamics in development we refer to and the l- ited scope assumed by manyof today’ssoftware managerswho stilluse outdated techniques. Many of the unsolved problems associated with the old techniques are symptoms of a lack of formalization and a lack of automation support. It was the goal of this workshop to bring together experts from science and practice in software and systems engineering from North America and Europe.
Author: Roch Glitho
Publisher: Springer
ISBN: 0387320156
Category : Computers
Languages : en
Pages : 317
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Book Description
Communication systems are now ubiquitous and making them more intelligent remains very challenging. The IFIP International Conference on Intelligence in Communication Systems is an effort to bring together researchers and practitioners who represent the latest developments in this area. This volume contains selected papers from the conference in the following focus areas: ad hoc networks / hybrid networks / WLAN; security, privacy and consumer protection; adaptive architectures and protocols; flexible QoS and QoS management; flexible service specification, validation, searching and querying; service composition and Web services; personal, terminal and node mobility; programmable and active networks.
