Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/3896
Título: Real-time communications over wired/wireless PROFIBUS networks supporting inter-cell mobility
Autor: Tovar, Eduardo
Alves, Mário
Palavras-chave: PROFIBUS
Wireless communications
Inter-cell mobility
Real-time communications
Data: 2007
Editora: Elsevier
Relatório da Série N.º: Computer Networks; Vol. 51, Issue 11
Resumo: 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.
Peer review: yes
URI: http://hdl.handle.net/10400.22/3896
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S1389128607000060
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