Study of reliable routing process to ensure the communication network resilience

Abstract

The article is devoted to a relevant scientific and applied problem related to improving potential solutions to increase network resilience by means of reliable routing. The study of several routing models is presented, taking into account different types of metrics, in particular, the metric based on the availability indicator. The technological task of routing is formulated in an optimization form. Attention is focused on the flow-based model of reliable routing, and its effectiveness is proved through modeling and comparative analysis with existing approaches. Also, single-path and multipath routing strategies were analyzed in terms of their effectiveness in increasing the level of network resilience. It is demonstrated that the multipath approach to reliable routing is necessary at high loads and contributes to an increase in the overall multi-path availability. At the same time, the implementation of a single-path routing strategy at high loads leads to routing solutions with a low availability indicator and limited use of the available network resource – bandwidth. The numerical research results have confirmed the effectiveness of the proposed multipath routing solution with the availability metric and allowed the formulation of general recommendations related to the implementation of reliable routing in practice. Thus, it is proposed to use a multipath routing strategy to balance the load in the network, together with consideration of availability metrics in calculating multipath for the data flow transmission. Further improvement of the reliable routing model is envisaged, considering the Quality of Service indicators when calculating reliable and productive multipath.