1993 4th Workshop on Future Trends of Distributed Computing Systems

22-24 Sept. 1993

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  • 1993 4th Workshop on Future Trends of Distributed Computing Systems

    Publication Year: 1993
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    Freely Available from IEEE
  • An efficient circuit-switching mechanism for interprocess communication in a transputer network

    Publication Year: 1993, Page(s):215 - 220
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    Distributed real time system require interprocess communication (IPC) services to be not only reliable and efficient but also predictable. In such dynamic systems, predictability can only be achieved by proper architectural support that embodies adequate mechanisms and policies within the operating system. The authors present the design and implementation of predictable transport level communicati... View full abstract»

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  • Constructing a distributed multimedia joint viewing and tele-operation service for heterogeneous workstation environments

    Publication Year: 1993, Page(s):8 - 15
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    JVTOS (joint viewing and tele-operation service) is an advanced teleservice to support cooperative work over distance which allows distributed users to work in a collaborative fashion with multimedia. JVTOS comprises facilities for session management, floor control, multimedia application sharing, telephoning, and audio/video communication. It provides generic support for cooperation-aware multime... View full abstract»

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  • Cooperative access to relational and object-oriented federated databases

    Publication Year: 1993, Page(s):222 - 227
    Cited by:  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Much work has been done in the field of heterogeneous federated database systems (FDBSs), but almost all this work deals with relational systems or, eventually, with the integration of hierarchical and network models and the relational model. The authors present a prototype that allows access to relational (INGRES) and object-oriented (O2) database systems composing a federation. They assume that ... View full abstract»

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  • Conception of a multimedia electronic mail based on standards

    Publication Year: 1993, Page(s):16 - 22
    Cited by:  Papers (1)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    The authors study multimedia electronic mail together with the issues of concern surrounding it and give an overview of a user-friendly multimedia electronic mail. Based on this study, the authors present a multimedia electronic system that allows the originator to write a scenario to coordinate the parts it sends and to adapt the message restitution to the receiver messaging system View full abstract»

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  • Programming flexible distributed real-time systems

    Publication Year: 1993, Page(s):326 - 331
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    Discusses the implementation of distributed real-time systems employing the active object model. This approach handles time constraints as part of a broader concept: quality of service (QOS). This generalization is necessary to deal with many current real-time applications, particularly those related to multimedia communications View full abstract»

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  • Completeness of the equational semantics for Basic LOTOS

    Publication Year: 1993, Page(s):396 - 403
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    The logical correspondence between the equational semantics of Basic LOTOS and is standard, derivational one is proven. A derivational semantics is traditionally given by means of a set of axioms and deduction rules which define a deduction system. With such semantics, some difficulties arise when dealing with deduction rules with negative premises; also, the proof that a transition cannot take pl... View full abstract»

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  • Making C++ a distributed programming language

    Publication Year: 1993, Page(s):228 - 233
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    Complex applications, such as computer-aided design, computer-aided manufacturing and multimedia applications, can derive the benefits of abstraction, modularity, extensibility, and reuse from object-oriented programming. However, object-oriented languages do not provide direct support for distributed computing. This makes programming in object-oriented languages in a distributed system fraught wi... View full abstract»

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  • The BERKOM multimedia-mail teleservice

    Publication Year: 1993, Page(s):23 - 30
    Cited by:  Papers (1)  |  Patents (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    A multimedia-mail teleservice based on CCITT Recommendation X.400 is under development within the BERKOM Project funded by the German PTT. An additional exchange mechanism complements the electronic mail's inherent store-and-forward mechanism in order to allow the resolution of references to message content, which may be placed within a message rather than the content itself. The traditional text ... View full abstract»

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  • On the integration of model-based performance optimization and program implementation

    Publication Year: 1993, Page(s):196 - 202
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB)

    The author describes an approach to integrate system design and implementation of embedded parallel systems into a programming environment. The computation of the design decisions is based on the branch-and-bound-with-underestimate technique, previously applied to compute the optimal schedule for precedence constraint task graphs in the presence of communication cost. The authors have extended thi... View full abstract»

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  • Schedulability analysis of multi-access protocols for distributed real-time systems

    Publication Year: 1993, Page(s):332 - 338
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    The class of online protocols which exhibit deterministic properties in spite of a lack of global knowledge are considered. Such protocols (e.g. tree protocols) yield computable bounds on the duration of collision resolution. The authors show that combining such deterministic properties with feasibility tests, such as those developed in real-time scheduling, permits the design of provably correct ... View full abstract»

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  • Optimization techniques for parallel protocol implementation

    Publication Year: 1993, Page(s):387 - 393
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The authors propose a method for deriving parallel, scheduling-optimized protocol implementations from sequential protocol specifications. They start with an SDL specification, identify a common path for optimization, and perform a data dependency analysis. The resulting common path graph is parallelized as far as permitted by the data dependency graph. The degree of parallelism is extended even f... View full abstract»

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  • Using the object space: a distributed parallel make

    Publication Year: 1993, Page(s):234 - 239
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    The author presents the object space approach to distributed computation. It allows for decoupled communication between program components by providing a shared data space of objects. The object space approach extends the sequential language C++ with coordination and communication primitives, such as those in Linda. It integrates inheritance into the associative addressing scheme and facilitates p... View full abstract»

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  • Understanding partitions and the `no partition' assumption

    Publication Year: 1993, Page(s):354 - 360
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    Discusses partitions in asynchronous message-passing systems. In such systems, slow processes and slow links can lead to virtual partitions that are indistinguishable from real ones. To overcome the impossibility of detecting crashed processes in an asynchronous system, the system model incorporates a failure suspector to detect (possibly erroneously) process failures. Based on failure suspicions,... View full abstract»

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  • An integrated approach to shared synchronous groupware workspaces

    Publication Year: 1993, Page(s):157 - 163
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    A unified framework for multimedia shared workspaces and their associated floor control that treats both audio and video components uniformly is presented. To this end, a classification scheme is presented which groups the shared workspaces based on multiple orthogonal criteria. For visual displays, this includes the group-orientation of the applications, the organization of the display, and the c... View full abstract»

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  • The System Architect's Assistant for design and construction of distributed systems

    Publication Year: 1993, Page(s):284 - 290
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    Distributed systems are conveniently described, constructed and managed in terms of their software structure or architecture. However, few current platforms exploit the architectural view. The authors outline current work on the provision of an architectural methodology and graphical support tool, the System Architect's Assistant, for the design and engineering of distributed systems. The tool sup... View full abstract»

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  • An experimental multimedia information exchange system

    Publication Year: 1993, Page(s):31 - 37
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    The authors summarize the lessons learned during a research project that aimed at understanding the practical problems encountered in building multimedia communication systems. An overview of the architecture and components of an experimental multimedia system is given. The prototype has both real-time and online communication capabilities. It supports both the peer-to-peer model and the client-se... View full abstract»

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  • Hierarchical decision structure for distributed algorithms

    Publication Year: 1993, Page(s):203 - 207
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    When the number of nodes in a distributed system becomes very large, neither a fully centralized algorithm nor a fully distributed algorithm is suitable for implementation. The number of messages exchanged in most distributed algorithms becomes too large to make them practical, while the system with a fully centralized algorithm is vulnerable to failure of the control node. The authors propose ano... View full abstract»

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  • An integrated approach to the design of communication protocols

    Publication Year: 1993, Page(s):411 - 418
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    Quality of service considerations have to be included in the whole protocol engineering cycle. The authors present an integrated approach for the design of communication protocols, including: performance enhanced formal specification of communication protocols, formal requirement specification, statistical performance analysis out of the enhanced formal specification, and verification of bounded p... View full abstract»

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  • How to find his way in the jungle of consistency criteria for distributed shared memories (or how to escape from Minos' labyrinth)

    Publication Year: 1993, Page(s):340 - 346
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Surveys consistency criteria that have been proposed, and sometimes implemented, for distributed shared objects and memories. Linearizability, sequential consistency, hybrid consistency and causal consistency are particularly emphasized. These criteria are precisely analyzed and protocols that implement them are described. It is suggested that the hybrid consistency, introduced by Attiya and Fried... View full abstract»

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  • A distributed model and architecture for interactive cooperation

    Publication Year: 1993, Page(s):143 - 149
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    Cooperative systems are intrinsically related to user interface systems. The design and implementation of a framework to support the construction of interactive and cooperative applications must consistently extend the models and architectures of single-user applications. The requirements for this extension include the management of the communication and coordination between users, the support for... View full abstract»

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  • Blocking probability and convergence analysis of an adaptive DQDB bandwidth balancing mechanism

    Publication Year: 1993, Page(s):269 - 275
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    The authors present a distributed realization of an adaptive load-based bandwidth balancing mechanism (APR, adaptive proportional) for improving DQDB (distributed queue dual bus), fairness and performance. Under the APR strategy, bandwidth is assigned distributedly and dynamically to each station according to the current offered load distribution in the system. The major significance of the method... View full abstract»

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  • The network-memory in a global distributed processing system

    Publication Year: 1993, Page(s):368 - 374
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    The authors present two scenarios of a target data processing/communication architecture that alleviate the main identified bottlenecks and pave the way towards a global distributed system supporting multimedia-based applications. The proposed processing/communication paradigm is based on the shared-memory capabilities offered by the optical network. A new structure, referred to as the network-mem... View full abstract»

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  • Mobility support in open bridged networks

    Publication Year: 1993, Page(s):428 - 434
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    The proliferation of powerful portable computers and the need for uninterruptible access to information impose new requirements on communication services, particularly regarding the provision of mobility support. The authors focus on mobility in an open bridged networking environment, i.e., bridged LANs interconnected by open bridges (OBs) across a public switched networks (such as SMDS and B-ISDN... View full abstract»

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  • A reactive flow control mechanism in ATM network with end-to-end transport

    Publication Year: 1993, Page(s):256 - 261
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    A source rate control mechanism called RCT (rate control for end-to-end transport), which reacts on instantaneous internal congestion, is developed. As the propagation delay is relatively long in ATM (asynchronous transfer mode) networks in comparison with transmission time, the feedback information on congestion can be late. To avoid low utilization of communication resources caused by the wrong ... View full abstract»

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