Cycle time properties of the PROFIBUS timed-token protocol
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چکیده
منابع مشابه
Cycle time properties of the PROFIBUS timed-token protocol
A recent trend in distributed computer-controlled systems (DCCS) is to interconnect the distributed elements by means of a multi-point broadcast network. As the network bus is shared between a number of network nodes, there is an access contention, which must be solved by the medium access control (MAC) protocol. Usually, DCCS impose real-time constraints. In essence, by real-time constraints w...
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1 Supported in part by a grant from the Texas Advanced Research Program. Abstract-The token protocols of FDDI and FDDI-M support both synchronous and asynchronous traffic. However, FDDI suffers from a token-lateness problem, and FDDI-M may starve asynchronous traffic. To remove these two weaknesses, we propose the on-time timed-token protocol. Its main feature is the addition of information to ...
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Guaranteeing message deadlines is a key issue in distributed real-time applications. The timed token medium access control (MAC) protocol is suitable for real-time application due to its important timing property of bounded channel access time which provides a necessary condition to ensure that the message deadlines are satissed. The inherent timing properties of the timed token protocol that a...
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We investigate the timing properties necessary to guarantee synchronous message deadlines in a token ring network such as FDDI (Fibre Distributed Data Interface) where the timed token medium access control protocol (MCA) is employed. We present a tighter upper bound, than previously published, for the worst case achievable utilisation of the MCA scheme. We also found that, under the condition t...
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ژورنال
عنوان ژورنال: Computer Communications
سال: 1999
ISSN: 0140-3664
DOI: 10.1016/s0140-3664(99)00123-1