Percorrer por autor "Hammer, Gerhard"
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- Real-time communications over hybrid wired/wireless PROFIBUS-based networksPublication . Alves, Mário; Tovar, Eduardo; Vasques, Francisco; Hammer, Gerhard; Röther, KlausPROFIBUS is an international standard (IEC 61158) for factory-floor communications, with some hundreds of thousands of world-wide installations. However, it does not include any wireless capabilities. In this paper we propose a hybrid wired/wireless PROFIBUS solution where most of the design options are made in order to guarantee the proper real-time behaviour of the overall network. We address the timing unpredictability problems placed by the co-existence of heterogeneous transmission media in the same network. Moreover, we propose a novel solution to provide inter-cell mobility to PROFIBUS wireless nodes.