A Novel Approach to the Adaptive Allocation of Bandwidth in IP/MPLS Networks in Conditions of Heavy Network Load
In this paper, an algorithm for adaptation layer in order to improve fairness in bandwidth allocation among different traffic classes in IP/MPLS networks under heavy traffic load is proposed. A definition of the blocking frequency of traffic flows at the entry of autonomous network domain and proportional-priority coefficient per traffic class are proposed and used as the input parameters of the adaptation mechanism. In order to evaluate the validity of the proposed algorithm, proper simulation tool is needed and for these purposes OPNET Modeler 14.5 is extended with the modules for adaptation process. Development methodology for the design of modules for adaptation process within network simulators is also proposed. The simulation results proved the hypothesis that with a proper adaptation layer, improvement of the fairness of bandwidth allocation among different traffic classes under heavy network load and at the same time keeps the required QoS conditions in the preferred boundaries is possible.