Method and apparatus for estimating periodic worst-case delay under actual and hypothetical conditions using a measurement based traffic profile
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United States of America Patent
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Jul 28, 2009
Grant Date -
N/A
app pub date -
Mar 30, 2001
filing date -
Mar 30, 2001
priority date (Note) -
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Abstract
Methods and apparatuses for estimating periodic worst-case delay for a class of traffic. An aggregate (i.e., a class or label on which traffic is classified and queued) has an associated bandwidth (“negotiated rate”), which typically is a maximum average bandwidth that has been agreed upon by the traffic generator (“customer”) and service provider. Delay for an aggregate is obtained by summing all the delays of class queues of each router in the path. Traffic data for the aggregate is collected. A burst-rate profile is calculated for the traffic data, with the rate parameter set to the value of the negotiated rate. A periodic worst-case delay estimate associated with the burst-rate profile is calculated, using the output link capacity allotted to the aggregate (“allocated bandwidth”) as input.
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