The study on overload control of application server in next-generation networks

Application server is an important entity of NGN and provides the execution environment for next-generation services, one necessary function of which is overload control. This paper introduces the concept of application server in next-generation networks and the overload control of application server. Furthermore, the overload control model for application server is proposed, and the overload control algorithm is discussed. The theoretic proof and simulation results prove the efficiency and fairness of the algorithm. It should be pointed out that the proposed overload control model and the algorithm are applicable for the application servers supporting different interfaces (Parlay, APIs, SIP, and etc.).