Computing and Information Systems - Research Publications

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End date: 1999 × Start date: 1994 × Type: Conference Paper × Subject: specification languages ×

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    Creating telecommunication services based on object-oriented frameworks and SDL
    SINNOTT, RICHARD ; Kolberg, Mario (IEEE Computer Society, 1999)
    This 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.
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    Specifying multimedia configurations in Z
    Sinnott, Richard O. (IEEE Computer Society, 1999)
    In this paper we illustrate how the formal specification language Z can be used to reason about the temporal and throughput constraints associated with multimedia flows of information. In particular we show how it is possible to specify issues related to maximum delays, throughputs and jitter of information flows and how control of these flows can be achieved. What makes out work particularly interesting is that we deal with temporal aspects of systems without the use of a temporal logic. Rather, we highlight the versatility of the Z language in modelling systems with real time constraints.
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    Specifying aspects of multimedia in LOTOS
    SINNOTT, RICHARD (IEEE Computer Society, 1999)
    The formal specification language LOTOS provides a model of systems where the temporal ordering of actions is specified. LOTOS typically does not deal with the specific times at when actions can occur. Most approaches for specifying real time systems in LOTOS have either extended the language, e.g. with timing aspects, or used the language in conjunction with a temporal logic. We argue that such approaches are not always necessary and that LOTOS is much more flexible than sometimes claimed. To support our arguments we show how LOTOS can be used to specify a multitude of timing issues that can be associated with the production and consumption of multimedia flows.