A carregar...
Publicação
Real-time communications over wired/wireless PROFIBUS networks supporting inter-cell mobility
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 807.88 KB | Adobe PDF |
Autores
Orientador(es)
Resumo(s)
PROFIBUS is an international standard (IEC 61158, EN 50170) for factory-floor communications, with several thousands
of installations worldwide. Taking into account the increasing need for mobile devices in industrial environments,
one obvious solution is to extend traditional wired PROFIBUS networks with wireless capabilities. In this paper, we outline
the major aspects of a hybrid wired/wireless PROFIBUS-based architecture, where most of the design options were
made in order to guarantee the real-time behaviour of the overall network. We also introduce the timing unpredictability
problems resulting from the co-existence of heterogeneous physical media in the same network. However, the major focus
of this paper is on how to guarantee real-time communications in such a hybrid network, where nodes (and whole segments)
can move between different radio cells (inter-cell mobility). Assuming a simple mobility management mechanism
based on mobile nodes performing periodic radio channel assessment and switching, we propose a methodology to compute
values for specific parameters that enable an optimal (minimum) and bounded duration of the handoff procedure.
Descrição
Palavras-chave
PROFIBUS Wireless communications Inter-cell mobility Real-time communications
Contexto Educativo
Citação
Editora
Elsevier