Extending the effective bandwidth concept to networks with priorityclasses
Berger, A.W.
Whitt, W.
Lucent Technol., Bell Labs., USA;
This paper appears in: Communications Magazine, IEEE
Publication Date: Aug 1998
Volume: 36,
Issue: 8
On page(s): 78-83
ISSN: 0163-6804
References Cited: 13
CODEN: ICOMD9
INSPEC Accession Number: 6013898
Digital Object Identifier: 10.1109/35.707820
Current Version Published: 2002-08-06
Abstract
ATM switches are now being designed to allow connections to be
partitioned into priority classes, with packets being emitted for higher
priority classes before packets are emitted for lower priority classes.
Accordingly, allocation of network resources based on different priority
levels is becoming a realistic possibility. Thus, we need new methods
for connection admission control and capacity planning that take account
of the priority structure. We show that the notion of effective
bandwidths can be used for these purposes when appropriately extended.
The key is to have admissibility of a set of connections determined by a
linear constraint for each priority level, involving a performance
criterion for each priority level. For this purpose, connections are
assigned more than one effective bandwidth, one for its own priority
level and one for each lower priority level. Candidate effective
bandwidths for each priority level can be determined by using previous
methods associated with the first-in first-out discipline. The proposed
effective bandwidth structure makes it possible to apply product-form
stochastic loss network models to perform dimensioning
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