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.

Electronic Chips & Systems Design Languagesoutlines and describes the latest advances in design languages. The challenge of System on a Chip (SOC) design requires designers to work in a multi-lingual environment which is becoming increasingly difficult to master. It is therefore crucial for them to learn, almost in real time, from the experiences of their colleagues in the use of design languages and how these languages have become more advanced to cope with system design. System designers, as well as students willing to become system designers, often do not have the time to attend all scientific events where they could learn the necessary information. This book will bring them a selected digest of the best contributions and industry strength case studies. All the levels of abstraction that are relevant, from the informal user requirements down to the implementation specifications, are addressed by different contributors. The author, together with colleague authors who provide valuable additional experience, presents examples of actual industrial world applications. Furthermore the academic concepts presented in this book provide excellent theories to student readers and the concepts described are up to date and in so doing provide most suitable root information for Ph.D. postgraduates.

Message Sequence Charts (MSC) have had an unanticipated success, both with SDL, on its own and in conjunction with other methods and tools. Major tool vendors now offer both SDL and MSC in their tool set. This timely volume reports on the recent developments in this expanding field. Several papers deal with language issues, tools and methods for effective use of MSC. Advances in "SDL technology" are discussed, and several papers deal with the early stages of product development and how SDL may be complemented by other methods, such as OMT, to improve problem understanding and make better SDL designs. New developments in the areas of tools for verification, validation and testing are also included, together with a large number of papers on applications.

This volume contains the papers presented at the 14th SDL Forum, Bochum, Germany entitled Design for Motes and Mobiles. The SDL Forum has been held every two years for the last three decades and is one of the most important open events in the calendar for anyone from academia or industry involved in System DesignLanguagesandmodelling technologies. It is a primary conference event for discussion of the evolution and use of these languages. The most recent innovations, trends, experiences, and concerns in the ?eld are discussed and presented. The SDL Forum series addresses issues related to the modelling and analysis of reactive systems, distributed systems, and real-time and complex systems such as telecommunications, automotive, and aerospace applications. The intended audience of the series includes users of modelling techniques in industrial, research, and standardization contexts, as well as tool vendors and language researchers. Of course, during the last three decades languages, associated methods, and tools have evolved and new ones have been developed. The application domain haschangedalmostbeyondrecognition. Threedecadesagothemobiletechnology of today was science ?ction, whereas now we ?nd software systems embedded in inexpensive childrens’ toys. More recently multi-core processors have become common technology for consumer computers, and are beginning to be applied in smalldevices. Eveninsmallco-operating,independently poweredremotedevices (such as motes and mobile phones), there is enough memory and processing power to support quite sophisticated operating systems and applications.

Formal Methods for Protocol Engineering and Distributed Systems addresses formal description techniques (FDTs) applicable to distributed systems and communication protocols. It aims to present the state of the art in theory, application, tools an industrialization of FDTs. Among the important features presented are: FDT-based system and protocol engineering; FDT application to distributed systems; Protocol engineeering; Practical experience and case studies. Formal Methods for Protocol Engineering and Distributed Systems contains the proceedings of the Joint International Conference on Formal Description Techniques for Distributed Systems and Communication Protocols and Protocol Specification, Testing, and Verification, which was sponsored by the International Federation for Information Processing (IFIP) and was held in Beijing, China, in October 1999. This volume is suitable as a secondary text for a graduate level course on Distributed Systems or Communications, and as a reference for researchers and industry practitioners.

This book constitutes the thoroughly refereed post-proceedings of the Third International Workshop on SDL and MSC, SAM 2002, held in Aberystwyth, UK in June 2002. The 15 revised full papers presented were carefully selected during two rounds of reviewing and revision. A broad variety of current issues on SDL and on MSC and TTCN are addressed, in particular languages for collaborative specification, visual requirements description, constraints in SDL, SDL extensions, protocol design, UMS protocol implementation, use case map scenarios, message sequence charts, MSC connectors, MSC-2000 extensions, and TTCN-3 in relation to UML and MSC.

What is SPIN? SPIN is a general tool for the specification and formal verification of software for distributed systems. It has been used to detect design errors in a wide range of applications, such as abstract distributed algorithms, data communications protocols, operating systems code, and telephone switching code. The verifier can check for basic correctness properties, such as absence of deadlock and race conditions, logical completeness, or unwarranted assumptions about the relative speeds of processes. It can also check for more subtle, system dependent correctness properties expressed inthe syntax of Linear-time Temporal Logic (LTL). The tool translates LTL formulae automatically into automata representations, which can be used in an efficient on-th-fly verifications procedure. This DIMACS volume presents the papers contributed to the second international workshop that was held on the SPIN verification system at Rutgers University in August 1996. The work covers theoretical and foundational studies of formal verifications, empirical studies of the effectiveness of different types of algorithms, significant practical applications of the SPIN verifier, and discussions of extensions and revisions of the basic code. This text will be of interest to those working in applications.