Enhanced multi-commodity flow model for QoS-aware routing in SDN

This paper is devoted to the development of the extended multi-commodity flow model in order to provide optimal routing based on the criteria of quality of service and minimal maximal channel utilization. Since most of the models consider these criteria separately and do not consider different requirements of flows to quality of service, the proposed model allows to close this gap by allowing to achieve compromise in optimal quality of service and overall network channel utilization. We introduce the new parameter that is called relative priority and is used to uniquely identify the flow based on the requirements of this flows to the quality of service parameters and two extra parameters that take into account users priority and sensitivity of the flow to the redirection degree.