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Simmcast is an object-oriented simulation framework for protocol and network research. Its design is focused towards simplicity and extensibility. Simmcast has specific support for group communication: allowing a spectrum of experiments that range from evaluation of abstract group communication models to simulation of more detailed unicast or multicast protocol behavior. It is cross-platform and written in Java.
Simmcast employs a process-based discrete-event model on which building blocks are combined and extended in order to create new simulation environments. Network and protocol parameters are given in terms of numeric distributions (fixed or probabilistic), which can be replaced without recompilation. This extensive use of numeric distributions combined to the extendible framework structure allow an abstract experiment to evolve into a detailed one by progressively increasing the level of detail and sources of non-determinism of the constituting blocks.
The software results from a research effort which begun in 2001, in Unisinos University, Brazil. The corresponding research project was led by Prof. Marinho P. Barcellos, with funding from Brazilian Research Agencies CNPq and FAPERGS. Many people have contributed to the project, including André Detsch, Lucas A. Seewald, Giovani Facchini, Guilherme B. Bedin, Rosana Casais, Rodolfo S. Antunes, and Ruthiano S. Munaretti. In particular, Simmcast has benefited from Hisham H. Muhammad's ideas of frameworks and extensibility, as well as its realization into a well-documented, full-fledged protocol simulation framework.