Fairness.in.Resources.Allocation.in.SRS.Core.Node
A key parameter in the design of an OBS network is the maximum and minimum burst size,
which is managed by the edge nodes using the assembly algorithms. This key parameter
is entirely overlooked by the resource allocation schemes based on the burst segmentation
concept, since no policies related to the size of the truncated burst (i.e., shortened data burst)
are implemented, during the burst segmentation process in the core nodes. Furthermore,
there is no fairness in allocating the network resources to the contending data bursts (usually
form different sources), as all the segments are simply discarded from only one burst
to resolve the contention.
Figure 5. SRS dropping policy with relation to CT, OT, and ST
The.first.DS.of.DB2.is.dropped
FCRB.=.1110 2.in.BCP2
The.last.DS.of.DB1.is.dropped
FCRB.=.011111 2.in.BCP1
BCP2.for.DB2
BCP1.for.DB1
DB2
DB1
2
Overlapping
Time
Switching
Time
Data Segment (DS)
3
Contention Time
DS
1
4
DSs dropping order
Other-Info SRS-Length Flag 1 1 1 0
Other-Info SRS-Length Flag 1 1 1 1 1 0
All-Opt cal Intermet: Next-Generat on Network Infrastructure
Copyright ?© 2007, Idea Group Inc. Copying or distributing in print or electronic forms without written permission
of Idea Group Inc.
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