Communication and concurrency
The concurrency workbench: a semantics-based tool for the verification of concurrent systems
ACM Transactions on Programming Languages and Systems (TOPLAS)
Packet audio playout delay adjustment: performance bounds and algorithms
Multimedia Systems
Model checking
Comparing the QoS of Internet audio mechanisms via formal methods
ACM Transactions on Modeling and Computer Simulation (TOMACS)
Multimedia Tools and Applications
Advances in Network Simulation
Computer
Performance measure sensitive congruences for Markovian process algebras
Theoretical Computer Science
Stochastic Process Algebra: From an Algebraic Formalism to an Architectural Description Language
Performance Evaluation of Complex Systems: Techniques and Tools, Performance 2002, Tutorial Lectures
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This article reports on our experience in using the EMPAgr/TwoTowers technology, we have developed in the past six years, in order to provide support to the design of new protocols for audio communications over IP, to the verification of correctness related properties, and to the assessment of the Quality of Service (QoS) of different design alternatives as well as the performance comparison with other existing protocols. The novelty of our approach amounts to the use of an executable specification language extended with performance modeling capabilities (called EMPAgr) to precisely describe protocols at a suitable level of abstraction. Our approach based on formal techniques may be advantageous with respect to conventional simulators routinely used by network engineers because, besides allowing the quality and the efficiency of the specified protocols to be assessed, it provides a compositional support to system modeling at a high level of abstraction and is capable of verifying functional properties of systems.