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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
    Request permission for commercial reuse | PDF file iconPDF (374 KB)
    Freely Available from IEEE
  • Author index

    Publication Year: 1998, Page(s): 485
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    Freely Available from IEEE
  • 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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  • Compositional specification and structured verification of hybrid systems in cTLA

    Publication Year: 1998, Page(s):335 - 340
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (180 KB)

    Many modern chemical plants have to be modelled as complex hybrid systems consisting of various continuous and event-discrete components. Besides the modular and easy to read specification, the formal verification of required properties (e.g., safety properties) is a major problem, due to the complexity of the models. In practice, mostly informal argumentations exist which show that certain proper... View full abstract»

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  • Timing analysis in OO system life-cycles

    Publication Year: 1998, Page(s):327 - 334
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (76 KB)

    The paper discusses the role of timing analysis through the whole system life cycle. It is suggested that the handling of non functional requirements, especially timing requirements, should be regulated by a life cycle model in the same way as other system development activities. Timing analysis should first be applied at the requirements phase and continued, in different forms and with different ... View full abstract»

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  • An approach to distributed component-based real-time application software development

    Publication Year: 1998, Page(s):275 - 283
    Cited by:  Papers (13)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    Component-based software development would allow application software to be largely constructed rather than programmed. This approach would dramatically improve the productivity of software development. Although there are many reusable software packages available, the integration of the chosen parts remains a very difficult problem because there are many barriers of integration, including programm... View full abstract»

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  • CORBA in real-time settings: a problem from the manufacturing domain

    Publication Year: 1998, Page(s):403 - 411
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    The Object Management Group's (OMG) Common Object Request Broker Architecture (CORBA) is an important and popular technology that supports the development of object based, distributed applications. The benefits promised by CORBA (abstraction, heterogeneity, etc.) are appealing in many application domains, including those that satisfy real time requirements-such as manufacturing. Unfortunately, COR... View full abstract»

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  • Simulation and analysis of real-time concurrent object models

    Publication Year: 1998, Page(s):318 - 326
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

    Today, there is a rapidly growing interest to transfer object oriented computing technologies into various fields of control-critical applications. Existing approaches concentrate on abstract design level modeling. We introduce “abstract object systems”, an abstract mathematical model of concurrent real time object systems. After that we present a simulation and analysis framework that... View full abstract»

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  • An object-oriented extension to PEARL90

    Publication Year: 1998, Page(s):265 - 274
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (92 KB)

    This paper presents an object-oriented extension to the real-time programming language PEARL. The new language preserves PEARL's expressiveness for timeliness and industrial processes and, at same time, improves the language's readability and manageability (through the better encapsulation paradigm derived from the object concept). Moreover, the resulting object model allows the definition of inte... 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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  • 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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  • A CORBA-based remote monitoring system for factory automation

    Publication Year: 1998, Page(s):396 - 402
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    Supporting rapid response to changing customer requirements, reduction in both time and cost of manufacturing process, and integration within a heterogeneous wide area networked enterprise are necessary to increase worldwide competitiveness in manufacturing. We propose a CORBA based architecture to realize that manufacturing environment. We have developed an ORB for PLC to realize that architectur... 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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  • Using ordered and atomic multicast for distributed deadlock prevention

    Publication Year: 1998, Page(s):106 - 116
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (156 KB)

    This paper presents a new mechanism for preventing resource deadlock in a distributed system. The mechanism uses the ordered and atomic multicast (OAM) services to prevent processes that concurrently share resources from deadlocks. OAM provides communication services which deliver messages to their destinations with the guarantees of ordering and atomicity. The paper shows that in a number of situ... View full abstract»

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  • A soft real-time TMO platform-WTMOS-and implementation techniques

    Publication Year: 1998, Page(s):256 - 264
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    The TMO (Time-triggered Message-triggered Object) model is a real time object model pursuing the timeliness guaranteed computing paradigm. A TMO contains two types of methods: time triggered method activated by its internal clock and message triggered method activated by a request from a client. We present the functions and the design techniques of a middleware platform to support execution of TMO... 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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  • 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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  • The navigational aspects of the logical design of user interfaces

    Publication Year: 1998, Page(s):425 - 430
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    The design of the user interface (UI) involves: a) logical design of the UI; and b) perceptual design of the UI. The logical design of a user interface includes both static or data related and dynamic or navigational aspects. The static aspects were discussed previously (E.J. Chang and T.S. Dillon, 1997). An important part of the static design is the determination of abstract user interface (AUI) ... View full abstract»

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  • Real-Time Inter-ORB Protocol on distributed environment

    Publication Year: 1998, Page(s):449 - 456
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (76 KB)

    The paper describes the design and implementation of Real-Time Inter-ORB Protocol suited for multimedia applications on the CORBA environment. Conventional CORBA is not well suited for real time applications, since it does not define policies nor mechanisms to provide QoS guarantees, and does not define key features that are necessary to support real time programming. The existing TAO's RIOP for R... 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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  • Responsive computing with CORBA

    Publication Year: 1998, Page(s):73 - 79
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (36 KB)

    The Common Object Request Broker Architecture (CORBA) is a widely-accepted, standardized system integration framework based on distributed object technologies. CORBA is focused on facilitating general computing environments and does not explicitly address the needs of responsive (fault-tolerant, real-time) computing. Therefore, the question remains how to extend today's CORBA implementations for s... View full abstract»

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  • Experience of responsiveness verification for connection establishment protocols

    Publication Year: 1998, Page(s):383 - 392
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    The responsiveness verification of a given communication protocol is to check whether the given protocol can recover from any abnormal state to a normal state within a permissible time or not. In order to make practical discussions, we assume that the lower and upper bounds of execution time are given for each message transfer and event. We propose a new responsiveness verification method which ex... View full abstract»

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  • Checked transactions in an asynchronous message passing environment

    Publication Year: 1998, Page(s):222 - 229
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (52 KB)

    Traditionally transactions have been single-threaded. In such an environment the thread terminating the transaction is, by definition, the thread which performed the work. Therefore, transaction termination is implicitly synchronised with the completion of the transactional work. With the increased availability of both software and hardware multi-threading, transaction services are being required ... View full abstract»

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  • Invocation of real-time objects in a CAN bus-system

    Publication Year: 1998, Page(s):298 - 307
    Cited by:  Papers (8)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (92 KB)

    The paper focuses on method invocation of real-time objects in a CAN-based distributed real-time system. A simple object model is introduced, which allows the convenient modelling of hardware and software components. Related to the object model, two issues are discussed. Firstly, a model is introduced which allows to form and address object groups. This reflects a basic need in a real-time system ... View full abstract»

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  • Pseudo-active replication of objects in heterogeneous clusters

    Publication Year: 1998, Page(s):132 - 133
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (48 KB)

    An approach to making distributed systems fault-tolerant is to replicate objects. The replicas have to be realized in different types of computers. In the active replication, the replicas are computed and communicated in the same synchronous way. The computation speed of the process depends on the slowest replica. We discuss a pseudo-active replication where events may not occur simultaneously, no... View full abstract»

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