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Original Articles

Boundedness, hierarchy of fairness, and communication networks with delay

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Pages 161-178 | Received 01 Mar 1988, Published online: 19 Mar 2007
 

Abstract

In this paper, we consider networks of communicating finite-state machines (CFSMs) with a delay-related fairness (T-fairness) constant imposed on all computations. The notion of T-fairness, in a sense, allows us to measure the degree of synchronization of parallel systems “quantitatively”. Based on the value of T, we define a hierarchy of unbounded networks. We are able to show that, in general, the hierarchy is infinite. However, if we restrict ourselves to networks of 2 machines, the hierarchy collapses all the way to the second level. We also derive the complexity result of the boundedness problem for CFSM networks with respect to T-fairness.

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