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Evaluating P-NET message's response time with fixed priority queuing at application process level
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Orientador(es)
Resumo(s)
P-NET is a multi-master fieldbus standard based on a
virtual token passing scheme. In P-NET each master is allowed to
transmit only one message per token visit. In the worst-case, the
communication response time can be derived considering that, in
each token cycle, all stations use the token to transmit a message.
In this paper, we define a more sophisticated P-NET model, which
considers the actual token utilisation. We then analyse the
possibility of implementing a local priority-based scheduling
policy to improve the real-time behaviour of P-NET.
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Contexto Educativo
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Instituto Politécnico do Porto. Instituto Superior de Engenharia do Porto. FEUP. University of York.