An efficient and class based active Queue Management for next generation networks

Delivering desired QoS to the applications is one of the most important challenges in next generation networks. Designing efficient queue management in midway nodes leads to improvement in NGN efficiency. This paper presents fair Efficient active Queue Management (EQM) mechanism for congestion avoidance and control in next generation networks. Proposed AQM mechanism uses instantaneous queue length to detect incipient congestion. Different traffics with various QoS requirements are routed in NGN. EQM uses linear optimization problem to control congestion in network nodes. Switching equipments drop arrival packets based on optimization problem outcomes. Proposed AQM mechanism is designed to accompany a transport-layer congestion control protocol such as TCP. We have simulated EQM using Opnet. Results show that proposed mechanism achieves its goals¹.