Method and system for implementing congestion detection and flow control in high speed digital network
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United States of America Patent
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Jul 23, 2002
Grant Date -
N/A
app pub date -
Oct 7, 1998
filing date -
Oct 16, 1997
priority date (Note) -
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Abstract
This system is made to perform congestion detection and flow control in high speed digital packet switching network (22) carrying discardable and non-discardable traffic. Forward traffic received at a destination system over a first connection from a source system is monitored. If a congestion-indicating bit is detected in a received packet, a backward congestion indicator is set in packets flowing from the destination system to the source system over a second connection. The source system integrates the number of backward congestion indicators received over successive periods of time using a count-up, count-down counter. Specific congestion control actions are taken at the source system as a function of the counter state at the end of each of the successive periods of time. The congestion control actions may include increasing or decreasing the bandwidth allocated to discardable traffic intended to be delivered over the first connection.
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