Method and apparatus for traffic flow control in data switches
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United States of America Patent
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Apr 13, 2004
Grant Date -
N/A
app pub date -
Feb 3, 2000
filing date -
Dec 22, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method and apparatus for traffic flow control in data switches are disclosed. Emission and loss priorities of cells to be switched are translated into a single discard priority, referred to as a bandwidth priority, which has consistent meaning across different emission priorities. This translation allows simultaneous consideration of loss and emission priority in determining which cells to discard when a switch becomes congested with cell traffic. Such consideration alleviates problems that can arise if cell discard decisions are based solely on either loss priority or emission priority. The invention is particularly useful for Asynchronous Transfer Mode (ATM) switches.
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