Method and apparatus for implementing a backpressure mechanism in an asynchronous data transfer and source traffic control system
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United States of America Patent
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Mar 11, 2008
Grant Date -
Jul 15, 2004
app pub date -
Jan 15, 2003
filing date -
Jan 15, 2003
priority date (Note) -
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Abstract
Methods for implementing a backpressure mechanism in an asynchronous data transfer and source traffic control system include detecting when a bus user is experiencing congestion and preventing other bus users from sending cells over the bus. According to a first embodiment, if congestion is detected for two consecutive frames, the arbiter is inhibited from granting access to any bus user for one frame. According to a second embodiment, if congestion is detected during any frame, all the bus users are prevented from transmitting low priority traffic until congestion is absent for four consecutive frames. An apparatus for performing the methods is also disclosed.
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