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Industrial Automatic Control Systems and Controllers

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Model of Heterogeneous Local Communication Network with Token Passing Access Protocol, Considering the Reliability of its Elements
E.B. Gezalov

In the article the local communication network, heterogeneous on the intensity of the incoming message flow and the type of messages, with token passing access protocol is considered. All communication stations of the considered local network consist of three substations: speech substations, video information substations and data substations. Speech substations form the speech subnet, video information substations form the video information subnet, and data substations form the data subnet. Substations within the same subnet are homogeneous in their activity. A model of the considered local network in discrete time is being carried out, which allows assessing the effect of the failure processes and restoration of substations of network stations and the communication channel on its characteristics. On the basis of the developed model of the local network can be determined the probabilistic- time characteristics of the researched network, taking into account the reliability of its elements.
Keywords: heterogeneous local area network; token passing access protocol; substation; subnet buffer; frame; time window; service interval.


DOI: 10.25791/asu.12.2020.1245

Pp. 50-55.

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