Queue length based ABR flow control system
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United States of America Patent
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Nov 23, 1999
Grant Date -
N/A
app pub date -
Mar 19, 1997
filing date -
Mar 19, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In an ATM network, a traffic management system is provided to allow simple nd effective implementation of rate-based available bit rate, or ABR, flow control at ATM switches, with the subject system using an innovative queue length based approach to calculate the cell rate that a source system can use to send cells. In one embodiment, the cell rate is calculated as an exponential function of the cell queue length at a switch, and the rate value is carried back to a source system via resource management, or RM, cells. The exponential rate calculation function provides a large stability region for a network for better flow control performance than other systems, with the subject system being easy to implement in ATM switches.
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