THE PERFORMANCE OF A STOCHASTIC CORPORATE NETWORK CONTROL SYSTEM

Abstract

The paper considers the technical efficiency (efficiency of operation) of a system of managing a large corporate network with the territorial diversity of autonomous network segments. Performance criteria are most fully characterized by the capabilities and quality of functioning of complex systems, that is, systems that are capable of performing specified functions in several ways, albeit with different quality. For such a variety of information systems, such as the information and computer network, attention is usually paid to methods of providing high quality service that meets the requirements of specific applications. We specify performance indicators for a large enterprise information network with large territorial diversity, multiple network segments with different physical principles, infrastructure and data exchange environments. Segment functioning environments may be heterogeneous, and switching lines may be cable, optical, infrared, optical, or electromagnetic. Quantitative indicators of the effectiveness of the management system and its impact on the efficiency of the corporate information and computer network as a complex technical system are considered. Changes in network management system states have been shown to be random or deterministic. Random changes can be caused by external and internal factors, determined by actions of the decision-maker, such as the network administrator. A mathematical model of the network management system is developed. The model with the states of normal working capacity, with network congestion, with temporary or complete failure of elements is considered. The process of state change is represented by a random process with a discrete set of values, that is, a Markov chain. The expression for the conditional criterion for the efficiency of the network management system is derived.