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This paper deals with port access control for local area computer communication bus networks. Emphasizing properties of the algorithms and delay-throughput performance, we focus on two collision-free access control schemes recently proposed by Eswaran, Hamacher, and Shedler. We also provide a comparison of these schemes to other available bus access techniques. The performance analysis is based on representation of the bus network as a closed queueing system with nonpreemptive priority service.
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