Overload Control for Parlay Gateway in the Next Generation Network

In the next generation network, the parlay gateway is the core entity, which is prone to overload. After analyzing the relation between service quantity and CPU utilization ratio in parlay gateway, an adaptive overload control algorithm based on ticket bank (AOCATB) implemented in parlay gateway is proposed. AOCATB is made up of a main algorithm and an assign algorithm. The overload control algorithm uses the ticket bank to control service flows, which parameter is controlled by the assign algorithm. The theoretical analysis and simulation results show the AOCATB is a simple, efficient, robust and fair algorithm.