Data transmission method, device and system
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United States of America Patent
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Oct 1, 2013
Grant Date -
Oct 4, 2012
app pub date -
May 11, 2012
filing date -
May 11, 2012
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
A data transmission method is provided, which includes: obtaining a current queue length of a queue corresponding to an output port; when the current queue length meets a back-pressure requirement, determining a back-pressure priority corresponding to the current queue length according to the current queue length and a mapping relationship between a preset queue length and the back-pressure priority, and generating back-pressure information, where the back-pressure information inhibits a line card from sending data with a data priority less than or equal to the back-pressure priority to the output port; and sending the back-pressure information to a line card.
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