Optimal Cell Loss Equalization for Video Multiplexers
Author(s)
Nikolaidis, Ioanis
Akyildiz, Ian F.
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Abstract
Video traffic multiplexers in high speed ATM networks are prone to
fairness problems with respect to the per-connection cell loss ratio
experienced by multiplexed video sources. The problem is a result of the
random, but fixed over time, relation of the frame transmission epochs
that feed a multiplexer. This paper presents a solution to this fairness
problem which is based on the enforcement of controlled per--connection
delays. The amount of delay imposed on each source is calculated by an
optimization process at connection admission and termination instants.
Two different optimization objectives, one minimax and one minisum, are
considered. Their performance and their relation to buffer space
constraints is examined. The loss and delay performance of the scheme is
also evaluated through simulations. In particular, very low
per--connection delay variance is observed, indicating reduced jitter.
Finally, two implementation alternatives of the scheme on an ATM
network are presented: (a) as a protocol between multiplexer and sources
and (b) as a non--work conserving service discipline for multiplexers.
The engineering aspects and, in particular, the buffer demands of the
two alternative implementations are discussed in detail.
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Date
1994
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478896 bytes
Resource Type
Text
Resource Subtype
Technical Report