OVERLOAD CONTROL FOR THE INTELLIGENT NETWORK AND ITS ANALYSIS BY SIMULATION

This paper reports an overload control method for the Intelligent Netw ork (IN). The IN, which is being investigated as a future communicatio n network, facilitates both rapid introduction of new services and eas y modification of existing services. In the IN, the call processing fu nctions and data needed to achieve IN services are distributed over se veral nodes. Therefore, traffic demand for the various services may ca use varying patterns of node overloads. It is therefore important to d evelop effective overload control methods and to evaluate their charac teristics. We propose an overload control method and evaluate its char acteristics in comparison with other methods under various overload tr affic patterns with a network simulator that models all nodes and thei r relationships in the IN. In particular, we focus on three aspects of overload control: how can high throughput be maintained, how can an o verloaded node be stabilized, and how can fair access be guaranteed.