Pub Date : 1999-05-02DOI: 10.1109/ISORC.1999.776347
H. Kopetz, E. Fuchs, D. Millinger, Roman Nossal-Tüyeni
In the design process of distributed real-time systems, a way must be found to cope with the complexity inherent in these systems. An established technique for this purpose is the decomposition of the system into smaller subsystems with well-defined, stable interfaces among them. In this paper, we propose a design method for the development of distributed real-time systems that are intended for safety-critical applications. The method is devised for the Time-Triggered Architecture, which constitutes such a real-time system. For the purpose of decomposition, we introduce a special type of interface, the so-called temporal firewall. In the Time-Triggered Architecture, there are three interfaces of this type-the Communication Network Interface, the Controlled Object Interface and the Gateway Interface-which partition the real-time system into autonomous subsystems. The design method clearly separates system and subsystem issues and focuses on the definition of the three interfaces between the subsystems. The feasibility and relevance of our design method is demonstrated by means of a small example from the automotive industry.
{"title":"An interface as a design object","authors":"H. Kopetz, E. Fuchs, D. Millinger, Roman Nossal-Tüyeni","doi":"10.1109/ISORC.1999.776347","DOIUrl":"https://doi.org/10.1109/ISORC.1999.776347","url":null,"abstract":"In the design process of distributed real-time systems, a way must be found to cope with the complexity inherent in these systems. An established technique for this purpose is the decomposition of the system into smaller subsystems with well-defined, stable interfaces among them. In this paper, we propose a design method for the development of distributed real-time systems that are intended for safety-critical applications. The method is devised for the Time-Triggered Architecture, which constitutes such a real-time system. For the purpose of decomposition, we introduce a special type of interface, the so-called temporal firewall. In the Time-Triggered Architecture, there are three interfaces of this type-the Communication Network Interface, the Controlled Object Interface and the Gateway Interface-which partition the real-time system into autonomous subsystems. The design method clearly separates system and subsystem issues and focuses on the definition of the three interfaces between the subsystems. The feasibility and relevance of our design method is demonstrated by means of a small example from the automotive industry.","PeriodicalId":211905,"journal":{"name":"Proceedings 2nd IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'99) (Cat. No.99-61702)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124365668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-05-02DOI: 10.1109/ISORC.1999.776368
J. Rufino, G. Arroz, P. Veríssimo
Object oriented techniques have been along the last decade one of the most useful programming paradigms. However, for distributed embedded systems, the semantic gap between the object orientation layer and the underlying infrastructure is extremely large. This gap can be narrowed, should the embedded system platform provide semantically rich communication and management services. The paper outlines our research effort in the provision of such services by CAN based (Controller Area Network) systems.
{"title":"Embedded platforms for distributed real-time computing: challenges and results","authors":"J. Rufino, G. Arroz, P. Veríssimo","doi":"10.1109/ISORC.1999.776368","DOIUrl":"https://doi.org/10.1109/ISORC.1999.776368","url":null,"abstract":"Object oriented techniques have been along the last decade one of the most useful programming paradigms. However, for distributed embedded systems, the semantic gap between the object orientation layer and the underlying infrastructure is extremely large. This gap can be narrowed, should the embedded system platform provide semantically rich communication and management services. The paper outlines our research effort in the provision of such services by CAN based (Controller Area Network) systems.","PeriodicalId":211905,"journal":{"name":"Proceedings 2nd IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'99) (Cat. No.99-61702)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134031510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-05-02DOI: 10.1109/ISORC.1999.776355
J. Axelsson
The automotive industry has been late in introducing object oriented (OO) analysis, design, and programming, compared to many other businesses. This is partly due to the fact that OO programming has been considered too expensive in terms of computational resources, but also because there are elements in the application functions for which OO methods do not give sufficient support. Nevertheless, OO techniques provide many advantages, and we discuss how they can be used for automotive real time control applications. The suggested approach is holistic in the following respects: it treats functionality on the vehicle level rather than on individual control units; it includes both the embedded system and its environment; and it considers both hardware and software.
{"title":"Holistic object-oriented modelling of distributed automotive real-time control applications","authors":"J. Axelsson","doi":"10.1109/ISORC.1999.776355","DOIUrl":"https://doi.org/10.1109/ISORC.1999.776355","url":null,"abstract":"The automotive industry has been late in introducing object oriented (OO) analysis, design, and programming, compared to many other businesses. This is partly due to the fact that OO programming has been considered too expensive in terms of computational resources, but also because there are elements in the application functions for which OO methods do not give sufficient support. Nevertheless, OO techniques provide many advantages, and we discuss how they can be used for automotive real time control applications. The suggested approach is holistic in the following respects: it treats functionality on the vehicle level rather than on individual control units; it includes both the embedded system and its environment; and it considers both hardware and software.","PeriodicalId":211905,"journal":{"name":"Proceedings 2nd IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'99) (Cat. No.99-61702)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134338079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-05-02DOI: 10.1109/ISORC.1999.776360
A. A. Hanish, T. Dillon
The commonly recognized weakness of modern object oriented design and implementation methodologies lies in their superficial treatment of inter-object dynamics. The paper describes a software toolbox called ODYMOT that integrates a number of approaches to the problem of behavior modeling. In order to achieve design flexibility, a two-layer object design architecture is used that blends together object oriented design concepts with those of high level Petri nets. The Petri net representation creates an additional access layer of object architecture, providing meta level object control with the sequencing of method execution. This modeling approach allows one, both mathematically and pragmatically, to achieve a more precise and flexible description and implementation of real time and distributed models.
{"title":"A tool for object-oriented dynamic modeling","authors":"A. A. Hanish, T. Dillon","doi":"10.1109/ISORC.1999.776360","DOIUrl":"https://doi.org/10.1109/ISORC.1999.776360","url":null,"abstract":"The commonly recognized weakness of modern object oriented design and implementation methodologies lies in their superficial treatment of inter-object dynamics. The paper describes a software toolbox called ODYMOT that integrates a number of approaches to the problem of behavior modeling. In order to achieve design flexibility, a two-layer object design architecture is used that blends together object oriented design concepts with those of high level Petri nets. The Petri net representation creates an additional access layer of object architecture, providing meta level object control with the sequencing of method execution. This modeling approach allows one, both mathematically and pragmatically, to achieve a more precise and flexible description and implementation of real time and distributed models.","PeriodicalId":211905,"journal":{"name":"Proceedings 2nd IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'99) (Cat. No.99-61702)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121448605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-05-02DOI: 10.1109/ISORC.1999.776356
R. Sinnott, M. Kolberg
The paper describes the tools and techniques being applied in the TINA Open Service Creation Architecture (TOSCA) project to develop object oriented models of distributed telecommunication services in SDL. The paper also describes the way in which Tree and Tabular Combined Notation (TTCN) test cases are derived from these models and subsequently executed against the CORBA based implementations of these services through a TTCN/CORBA gateway.
{"title":"Creating telecommunication services based on object-oriented frameworks and SDL","authors":"R. Sinnott, M. Kolberg","doi":"10.1109/ISORC.1999.776356","DOIUrl":"https://doi.org/10.1109/ISORC.1999.776356","url":null,"abstract":"The paper describes the tools and techniques being applied in the TINA Open Service Creation Architecture (TOSCA) project to develop object oriented models of distributed telecommunication services in SDL. The paper also describes the way in which Tree and Tabular Combined Notation (TTCN) test cases are derived from these models and subsequently executed against the CORBA based implementations of these services through a TTCN/CORBA gateway.","PeriodicalId":211905,"journal":{"name":"Proceedings 2nd IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'99) (Cat. No.99-61702)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126485587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-05-02DOI: 10.1109/ISORC.1999.776371
L. Becker, M. Gergeleit, E. Nett, C. Pereira
This paper describes a powerful integrated development environment that covers all steps of the development of an object-oriented real-time application from initial design to the final evaluation. The system consists of a set of integrated tools for modeling, simulation, implementation, instrumentation, monitoring, and visualization that all work on the same OO system model. As all steps of creating a running implementation with visualized monitoring output from the design model are automatic, the environment encourages an iterative approach to the design of complex real-time control applications. This complete environment has been accomplished by integrating the SIMOO-RT modeling, simulation and implementation environment, developed at the Federal University of Rio Grande do Sul, with the Jewel++ object-oriented instrumentation and monitoring tool from GMD, St. Augustin, Germany. The work has been done in the context of the ADOORATA project (A Distributed Object-Oriented Architecture for Real-Time Automation), a Brazilian-German cooperation.
{"title":"An integrated environment for the complete development cycle of an object-oriented distributed real-time system","authors":"L. Becker, M. Gergeleit, E. Nett, C. Pereira","doi":"10.1109/ISORC.1999.776371","DOIUrl":"https://doi.org/10.1109/ISORC.1999.776371","url":null,"abstract":"This paper describes a powerful integrated development environment that covers all steps of the development of an object-oriented real-time application from initial design to the final evaluation. The system consists of a set of integrated tools for modeling, simulation, implementation, instrumentation, monitoring, and visualization that all work on the same OO system model. As all steps of creating a running implementation with visualized monitoring output from the design model are automatic, the environment encourages an iterative approach to the design of complex real-time control applications. This complete environment has been accomplished by integrating the SIMOO-RT modeling, simulation and implementation environment, developed at the Federal University of Rio Grande do Sul, with the Jewel++ object-oriented instrumentation and monitoring tool from GMD, St. Augustin, Germany. The work has been done in the context of the ADOORATA project (A Distributed Object-Oriented Architecture for Real-Time Automation), a Brazilian-German cooperation.","PeriodicalId":211905,"journal":{"name":"Proceedings 2nd IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'99) (Cat. No.99-61702)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134346164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-05-02DOI: 10.1109/ISORC.1999.776369
M. Aksit, B. Tekinerdogan
Software is rarely designed for ultimate adaptability, performance or reusability but rather it is a compromise of multiple considerations. Even for a simple architecture specification, one may identify many alternative implementations. The paper makes an attempt to depict the space of implementation alternatives of architectures, and to define rules for selecting them. The applicability of this approach is illustrated by means of a simple design problem.
{"title":"Evaluating architecture implementation alternatives based on adaptability concerns","authors":"M. Aksit, B. Tekinerdogan","doi":"10.1109/ISORC.1999.776369","DOIUrl":"https://doi.org/10.1109/ISORC.1999.776369","url":null,"abstract":"Software is rarely designed for ultimate adaptability, performance or reusability but rather it is a compromise of multiple considerations. Even for a simple architecture specification, one may identify many alternative implementations. The paper makes an attempt to depict the space of implementation alternatives of architectures, and to define rules for selecting them. The applicability of this approach is illustrated by means of a simple design problem.","PeriodicalId":211905,"journal":{"name":"Proceedings 2nd IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'99) (Cat. No.99-61702)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130984757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-05-02DOI: 10.1109/ISORC.1999.776362
I. Kogiku, M. Katayama, Takashige Hoshiai
Sense: A Service Navigation System is an agent system supporting interaction between the end user (consumer) and service provider (producer) in an open, distributed object environment. It navigates among the latest multimedia network services based on the end user's wishes, profile and situations. Its service navigation strategy is a key feature of Sense; it navigates based not merely on pre-registered user information, but taking into consideration the history of service selection by the user, advertising information from the service provider and other clues. Moreover, Sense makes use of object services available in the open distributed processing environment, such as traders and service type repositories, enabling it to take the initiative in proposing the latest multimedia network services.
{"title":"Sense: a Service Navigation System linked to a real-time advertising distribution service","authors":"I. Kogiku, M. Katayama, Takashige Hoshiai","doi":"10.1109/ISORC.1999.776362","DOIUrl":"https://doi.org/10.1109/ISORC.1999.776362","url":null,"abstract":"Sense: A Service Navigation System is an agent system supporting interaction between the end user (consumer) and service provider (producer) in an open, distributed object environment. It navigates among the latest multimedia network services based on the end user's wishes, profile and situations. Its service navigation strategy is a key feature of Sense; it navigates based not merely on pre-registered user information, but taking into consideration the history of service selection by the user, advertising information from the service provider and other clues. Moreover, Sense makes use of object services available in the open distributed processing environment, such as traders and service type repositories, enabling it to take the initiative in proposing the latest multimedia network services.","PeriodicalId":211905,"journal":{"name":"Proceedings 2nd IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'99) (Cat. No.99-61702)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116141331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-05-02DOI: 10.1109/ISORC.1999.776382
T. Nakajima
In this paper, we propose a software architecture for building environment-aware software that runs in various real-time computing environments by adapting programs to their respective environments. The framework is especially suitable for embedded computing environments, since the environments are required to support various types of computers.
{"title":"A framework for building environment-aware software","authors":"T. Nakajima","doi":"10.1109/ISORC.1999.776382","DOIUrl":"https://doi.org/10.1109/ISORC.1999.776382","url":null,"abstract":"In this paper, we propose a software architecture for building environment-aware software that runs in various real-time computing environments by adapting programs to their respective environments. The framework is especially suitable for embedded computing environments, since the environments are required to support various types of computers.","PeriodicalId":211905,"journal":{"name":"Proceedings 2nd IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'99) (Cat. No.99-61702)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127419518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-05-02DOI: 10.1109/ISORC.1999.776401
B. Selić
We introduce the concept of protocols. A protocol is a formal specification of potentially complex reusable pattern of inter-object behavior. To make it reusable, a protocol is defined independently of any specific object classes or instances. Even though they are defined independently of individual classes, we demonstrate how, using the notion of two-way interfaces called ports, protocols can be formally bound to structures of collaborating objects. This gives us a framework in which it is possible to formally verify if a particular combination of objects can indeed achieve the desired inter-object behavior. A further advantage is that programs with protocol specifications are more understandable and more maintainable than traditional object oriented programs since the required high level behavior is explicit. We describe both protocols and ports using the base concepts of the recent Unified Modeling Language (UML) standard.
{"title":"Protocols and ports: reusable inter-object behavior patterns","authors":"B. Selić","doi":"10.1109/ISORC.1999.776401","DOIUrl":"https://doi.org/10.1109/ISORC.1999.776401","url":null,"abstract":"We introduce the concept of protocols. A protocol is a formal specification of potentially complex reusable pattern of inter-object behavior. To make it reusable, a protocol is defined independently of any specific object classes or instances. Even though they are defined independently of individual classes, we demonstrate how, using the notion of two-way interfaces called ports, protocols can be formally bound to structures of collaborating objects. This gives us a framework in which it is possible to formally verify if a particular combination of objects can indeed achieve the desired inter-object behavior. A further advantage is that programs with protocol specifications are more understandable and more maintainable than traditional object oriented programs since the required high level behavior is explicit. We describe both protocols and ports using the base concepts of the recent Unified Modeling Language (UML) standard.","PeriodicalId":211905,"journal":{"name":"Proceedings 2nd IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'99) (Cat. No.99-61702)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115591532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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