Influence of Node Reliability on Data Exchange Efficiency in Distributed Monitoring Systems with Dynamic Topology

Dynamic routing protocols transmit routing information in a finite time, resulting in errors in determining the optimal packet route. As a consequence, the efficiency of data exchange may deteriorate, for example, increasing the time spent on the network packets. The aim of the work is to study the behavior of the network in the case of unpredictable topology changes caused by sudden multiple failures of network equipment. The solution is carried out with the help of a specialized simulation model that allows you to track the change in network parameters in the process of its operation. Simulation showed that equipment failures lead to a qualitatively new network behavior, for the characteristics of which, along with the traditional indicator “packet delivery time”, two characteristics are additionally defined: “the proportion of lost packets” and “the probability of packet looping”. A comparative analysis of several variants of the implementation of routing algorithms using multi-step and one-step metrics is performed and the conditions for choosing the optimal parameters of routing process control are determined. The results of the research allow us to determine the requirements for the speed of transmission of route information, characteristics of route labels and access control parameters depending on the network topology.