Congestion avoidance networks: CEFLAR. Congestion estimation feedback by limited acceleration-rate/-ratio

This paper shows that a network supplying variable bit rate services can be prevented from becoming congested if each terminal limits the capacity of its connection in terms of its rate of increase. Variable bit rate sources are adequately assessed with two new concepts: the bit rate increase per unit time (acceleration-rate=α bit/sec∧2) or the bit rate increase ratio (acceleration-ratio=exp(β)). The dimension of the acceleration-ratio coefficient β is seconds∧-l and the upper limits α and β are regulated to guarantee the network´s QoS. The proposed concepts allow the network state to be accurately estimated and so avoid congestion. The proposed method can be applied to ATM networks, frame relay networks, fast reservation protocol systems and so on