Communication response time in P-NET networks: Worst-case analysis considering the actual token utilization

• Tipo: Artigo em Revista Científica Internacional
• Data: 2002

Autores

tovar, e (Autor) Outra; vasques, f (Autor) FEUP; burns, a (Autor) Outra

Revista

Título: Real-Time Systems

Vol. 22

Páginas: 229-249

ISSN: 0922-6443

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 9 Citações

Scopus - 10 Citações

Outras Informações

ID Authenticus: P-000-PM1

DOI: 10.1023/a:1014554317965

Abstract (EN): Fieldbus networks aim at the interconnection of field devices such as sensors, actuators and small controllers. Therefore, they are an effective technology upon which distributed computer-controlled systems (DCCS) can be built. DCCS impose strict timeliness requirements to the communication network. In essence, by timeliness requirements we mean that traffic must be sent and received within a bounded interval, otherwise a timing fault is said to occur. 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, which means that in the worst-case the communication response time could be derived considering that the token is fully utilized by all stations. However, such analysis can be proved to be quite pessimistic. In this paper, we propose a more sophisticated P-NET timing analysis model, which considers the actual token utilization by different masters. The major contribution of this model is to provide a less pessimistic, and thus more accurate, analysis for the evaluation of the worst-case communication response time in P-NET fieldbus networks.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 21