Congestion Avoidance Networks Based on congestion Estimation Feedback by Limited Acceleration-Rate/-Ratio: CEFLAR

Nobuyuki TOKURA  Hideo TATSUNO  Yoshio KAJIYAMA  

IEICE TRANSACTIONS on Communications   Vol.E79-B   No.4   pp.550-559
Publication Date: 1996/04/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Communication Networks and Services
asynchronous transfer mode,  traffic management,  flow control,  congestion avoidance control,  

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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=αbit/sec2) or the bit rate increase ratio (acceleration-ratio=exp (β) ). The dimension of the acceleration-ratio coefficient βis seconds-1. 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 avoid congestion. The proposed method can be applied to ATM networks, Frame Relay networks, Fast Reservation Protocol systems and so on.