Rate allocation system and method for ATM switched networks
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United States of America Patent
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Mar 19, 2002
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N/A
app pub date -
Dec 24, 1998
filing date -
Aug 12, 1998
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Abstract
A method for rate allocation within the individual switches of a communication network implementing a rate-based congestion control approach for best-effort traffic. The method enables a guaranteed minimum bandwidth to be allocated to each communication session or connection, in addition to fairly dividing the available bandwidth among the competing connections. The method also estimates the transmission rate of each connection, instead of relying on explicit indications provided by the connection, and uses this information in the computation of its fair share of bandwidth. The method also calculates the available bandwidth on the link where the bandwidth is allocated, by measuring the utilization of the link periodically. Finally, the method incorporates a mechanism to detect connections that remain idle and withdraw allocations from them so as to avoid under-utilization of the link bandwidth.
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