Novel Metrics for Evaluating Congestion of Autonomous System

Internet Service Provider (ISP) needs to evaluate change of network congestion level, accordingly takes measures of congestion control to mitigate network congestion and guarantees to provide definite quality of service (QoS) for users. After autonomous system (AS) performance matrix model was introduced, a new path performance metric RL was defined firstly, and then four kinds of scalar quantity functions of performance matrix was defined. The necessity and sufficiency of AS network congestion metrics were justified utilizing matrix theory and their ranges were discussed. Simulation results indicate that these metrics can evaluate AS network congestion level effectively.