Abstract
This paper studies how the capacity utilization can be improved by proper
configuration of loss guaranteed tunnels in optical burst switching (OBS)
networks. We show that the method of computing residual bandwidth in IP networks
is not applicable to OBS networks due to the bufferless nature. We propose
a more accurate metric, residual admission capacity (RAC), to measure the
amount of link residual capacity. We apply the concept of RAC in loss budget
partitioning and loss threshold selection. First, we develop an RAC based
loss budget partitioning (RAC-LBP) algorithm. The RAC-LBP is efficient in
capacity utilization and flexible with loss threshold settings. We then develop
an RAC based loss threshold selection (RAC-LTS) algorithm. Using the loss
thresholds determined by the RAC-LTS can improve the capacity utilization
efficiency.
© 2009 IEEE
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