Traffic Rate and Shape Control with Queue Threshold Congestion Recognition

Blair COLLIER  Hyong KIM  

Publication
IEICE TRANSACTIONS on Communications   Vol.E81-B   No.2   pp.409-416
Publication Date: 1998/02/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on ATM Switching Systems for future B-ISDN)
Category: Control and performance
Keyword: 
ATM congestion control,  fluid flow approximation,  traffic shaping,  

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Summary: 
This paper presents analysis of a congestion control scheme in which a multiplexer notifies upstream traffic sources when its buffer level crosses a preset threshold. Upon notification, the traffic streams are reshaped to a form less likely to cause overflow through rate or burstiness restrictions, or a combination of the two. For the analysis, the traffic is modeled by two Markov Modulated Rate Processes (MMRP's), one for above and one for below the threshold, and an iterative fluid approximation technique is used to determine the buffer occupancy distribution. Simulation results verify the accuracy of the approach, and the analysis is used to study the effect of varying the threshold and shaping function.