Object-Oriented Real-time Distributed Computing, 1998. (ISORC 98) Proceedings. 1998 First International Symposium on

20-22 April 1998

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  • Proceedings First International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC '98)

    Publication Year: 1998
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    Freely Available from IEEE
  • Author index

    Publication Year: 1998, Page(s): 485
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    Freely Available from IEEE
  • Validating the design of dependable systems

    Publication Year: 1998, Page(s):364 - 372
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (124 KB)

    The paper presents an approach for the specification and verification of the correctness of dependable system designs achieved by the application of fault tolerant techniques based on equivalence relations and model checking techniques. The behaviour of the system in absence of faults is formally specified and faults are assumed as random events which interfere with the system by modifying its beh... View full abstract»

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  • Concepts and features of processes flying technology

    Publication Year: 1998, Page(s):481 - 484
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    Processes flying is considered a key technological concept of computation organization, suitable also for the development of parallel programs of high dynamism, reliability and tunability to different internal and external factors (including unpredictable factors) View full abstract»

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  • The time-triggered architecture

    Publication Year: 1998, Page(s):22 - 29
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    The Time-Triggered Architecture (TTA) is a computer architecture for distributed real-time systems in safety critical applications, such as computer controlled brakes, or computer assisted steering in an automobile. The TTA is a composable architecture for the design of large real-time systems. Its main characteristics are a common notion of time in all subsystems of the architecture and the provi... View full abstract»

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  • A method of test cases generation for real-time systems

    Publication Year: 1998, Page(s):249 - 253
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (80 KB)

    Real time software must satisfy not only functional correctness requirements but also timeliness requirements. A lot of real time research has focused on analysis rather than testing. During the execution of real time software, a sequence of events due to time take place between the concurrent processes. Because of the unpredictable progress of concurrent processes, multiple executions of real tim... View full abstract»

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  • Distributed observable/observer: a distributed real-time object-communication mechanism

    Publication Year: 1998, Page(s):358 - 362
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (40 KB)

    We describe a software mechanism that simplifies the implementation of real time distributed object oriented applications. The distributed observable/observer mechanism extends the Observable/Observer concept of Java to a distributed environment encapsulating the communication protocol used by networking. The mechanism supports the distributed model/view controller (M/VC) paradigm, allowing view c... View full abstract»

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  • Using the object paradigm for distributed real-time systems

    Publication Year: 1998, Page(s):478 - 480
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (28 KB)

    One of the primary features of almost all physically distributed software is that it has to deal with the unpredictable nature and complexity of the physical world. For example, it has to detect failures and undertake recovery procedures, it may have to reconfigure itself dynamically, and so on. In effect, all such distributed systems are de facto real time systems. As more and more software syste... View full abstract»

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  • An implementation model for time-triggered message-triggered object support mechanisms in CORBA-compliant COTS platforms

    Publication Year: 1998, Page(s):12 - 21
    Cited by:  Papers (15)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    Object-oriented analysis and design methodologies have become popular in development of non-real-time business data processing applications. However, conventional object-oriented techniques have had minimal impacts on development of real-time applications mainly because these techniques do not explicitly address key characteristics of real-time systems, in particular timing requirements. The Time-... View full abstract»

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  • Integration of autonomous decentralized systems with different fault tolerance requirement levels

    Publication Year: 1998, Page(s):240 - 248
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (88 KB)

    As the standardization of computers, networks and OS's has been going on and different systems can be easily connected physically, it is more preferable to integrate existing systems from an economical viewpoint. Under the changing requirements and situations, system engineering technologies to realize an individual user's requirements on a standard platform have become more important. Even when t... View full abstract»

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  • Quality-based flexibility in distributed objects

    Publication Year: 1998, Page(s):350 - 357
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (180 KB)

    The paper discusses how to make a distributed object system flexible so as to satisfy the application's requirement in the change of the system environment. Each object supports other objects with quality of service (QoS). The change of the system is modeled to be the change of not only types of service but also QoS supported by the objects. We discuss equivalency and compatibility relations among... View full abstract»

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  • Distributed object-oriented real-time systems using a hybrid model of Ada 95's built-in distributed capability and emerging real-time CORBA capabilities

    Publication Year: 1998, Page(s):440 - 448
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (52 KB)

    The paper reports on the issues in design and development of object oriented real time distributed systems using Ada 95. First, one of the general distributed real time problems is introduced as it fits the domain within Boeing. Next, prototype solutions to the distributed capabilities are introduced including the new technologies present in Ada 95 through DSA (Distributed Systems Annex-E) and ext... View full abstract»

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  • A dependable distribution-transparent remote method invocation model for object-oriented distributed embedded computer systems

    Publication Year: 1998, Page(s):467 - 476
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    Decreasing hardware costs is permitting the increased use of embedded computers to support complex and sophisticated applications in a variety of products. Many of these applications require computing nodes distributed in different physical locations interconnected by communication networks. The object oriented model with its well known properties that facilitate the design of complex software app... View full abstract»

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  • Coordinated atomic actions in modelling object cooperation

    Publication Year: 1998, Page(s):152 - 161
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (76 KB)

    The approach described in this paper makes use of Coordinated Atomic Actions (CA actions)-a structural design mechanism, for representing the cooperation between objects, at different stages of the software development. The original concept of a CA action has been expanded for accommodating the modelling needs of the initial stages of software development. One of the motivations for using CA actio... View full abstract»

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  • Supporting real-time multimedia applications with distributed object controlled networks

    Publication Year: 1998, Page(s):2 - 11
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (108 KB)

    The ReTINA project (ACTS AC048) is an industrial collaboration to explore the use of CORBA for the support of real-time multimedia services, from the point of view of network control and from the point of view of middleware services. This paper covers CORBA for network control, and CORBA extensions towards a DPE framework for flexible binding and real-time support View full abstract»

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  • BDL, a language of distributed reactive objects

    Publication Year: 1998, Page(s):196 - 205
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    We introduce the definition of a language of distributed reactive objects, a Behaviour Description Language (BDL), as a unified medium for specifying, verifying, compiling and validating object-oriented distributed reactive systems. One of the novelties in BDL is its seamless integration into the Unified Modeling Language approach (UML). BDL supports a description of objects interaction which resp... View full abstract»

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  • Implementation of a customizable fault tolerance framework

    Publication Year: 1998, Page(s):230 - 239
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    While there has been significant advances in fault tolerance research, the effort has focused on the design of individual fault-tolerant systems or methodologies. Recently, some research has been initiated to develop fault tolerance paradigms that can be used to provide a spectrum of fault tolerance levels. In this paper, we present the design of a fault tolerance framework that can be used to sup... View full abstract»

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  • An adaptive approach to object-oriented real-time computing

    Publication Year: 1998, Page(s):342 - 349
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (88 KB)

    Real time computing is becoming an enabling technology for many important distributed applications such as flexible manufacturing, multimedia, robotics and process control. Traditionally, real time systems have been realized as isolated embedded systems. Unfortunately, this approach no longer suffices for future complex systems in the application scenarios mentioned above. In this situation, the u... View full abstract»

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  • Active rule processing in the BioCompose database

    Publication Year: 1998, Page(s):431 - 437
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (60 KB)

    BioCompose is an object-relational database query tool that runs on top of any relational database and provides an intelligent and complete object-relational interface to the user. Unlike the traditional approach, which is completely table driven, queries in BioCompose are structured along the lines of natural language and sentences. In BioCompose, the database server continuously monitors the tri... View full abstract»

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  • Asynchronous protocols to meet real-time constraints: is it really sensible? How to proceed?

    Publication Year: 1998, Page(s):290 - 297
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (108 KB)

    This paper investigates the use of asynchronous protocols to design and build middleware whose aim is to provide run-time support for soft real-time applications. A simple and general framework is described. This framework allows to take into account timeliness constraints of upper layer applications, while using an asynchronous protocol at the underlying level. When a timeliness constraint is abo... View full abstract»

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  • Evolution of a distributed, real-time, object-based operating system

    Publication Year: 1998, Page(s):142 - 143
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (20 KB)

    In this paper, we discuss the architecture of MK, its salient features and the evolution of MK from its multi-user, timesharing origins. MK targets a much broader class of applications than typical real-time executives so it must provide more sophisticated functionality than the typical real-time OS (RTOS). In addition to standard features such as pre-emptive scheduling and resource partitioning, ... View full abstract»

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  • Specifying and measuring quality of service in distributed object systems

    Publication Year: 1998, Page(s):43 - 52
    Cited by:  Papers (48)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (84 KB)

    Distributed applications are difficult to build and maintain and are even more difficult when the applications are distributed over wide-area networks. Distributed Object Computing middleware has emerged to simplify the building of distributed applications by hiding implementation details behind functional interfaces. However, critical applications have non-functional requirements, such as real-ti... View full abstract»

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  • Object-oriented design of real-time telecom systems

    Publication Year: 1998, Page(s):458 - 466
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (88 KB)

    Many engineers are still reluctant to adopt advanced object oriented technologies (such as high modularity, dynamic binding, automatic garbage collection, etc.) for embedded systems with real time constraints, because of their supposed inefficiency. We set ourselves into the context of building telecommunication systems with a standard object oriented analysis and design approach. We describe how ... View full abstract»

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  • Real time resource allocation for multimedia object communication

    Publication Year: 1998, Page(s):308 - 316
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    We propose a dynamic bandwidth management scheme for asynchronous LANs that uses the concept of time division multiple access (TDMA). The scheme is to ensure quality of service (QoS) for multimedia applications. Significant performance improvement is observed through experimental results. In particular, the transmission rates for multimedia hosts improve significantly with low jitter variations in... View full abstract»

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  • A purpose-oriented access control model for object-based systems

    Publication Year: 1998, Page(s):146 - 147
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (44 KB)

    Distributed applications are modelled in an object-based model like CORBA. Here, the system is a collection of objects. The objects are manipulated only through operations supported by themselves. The purpose-oriented model is proposed where an access rule shows for what each subject s manipulates an object o by an operation t of o so as to keep the information flow legal. The purpose of s to acce... View full abstract»

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