Stability Analysis of the Rate-Based Congestion Control Algorithm for ABR Service Class in ATM Networks

A rate-based congestion control algorithm is a feedback-based flow control mechanism for ABR (Available Bit Rate) service class. When the operation of the rate-based congestion control algorithm becomes unstable, it would cause several problems; fairness among connections is deteriorated, and QoS (Quality of Service) of ABR service class becomes unpredictable. In this paper, we analyze the dynamical behavior of the rate-based congestion control algorithm with binarymode switches by extending our previous work. We analyze two forward RM cell generation schemes: counter-based and timer-based schemes. We also show that unstable behavior is caused only when the counter-based scheme is adopted at source end systems, which implies an inherent problem of the current rate-based congestion control algorithm. 英文 key words ABR service class, rate-based congestion control algorithm, binary-mode switch, stability analysis