Method and apparatus for auto detection of AAL5 type frames
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United States of America Patent
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Feb 5, 2002
Grant Date -
Dec 27, 2001
app pub date -
Dec 23, 1997
filing date -
Dec 23, 1997
priority date (Note) -
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Abstract
In Asynchronous Transfer Mode (ATM) communications networks, certain congestion control features, such as Partial Packet Discard (PPD) and Early Packet Discard (EPD), operate on ATM cells that have been segmented from ATM Adaptation Layer #5 (AAL5) frames (packets). AAL5 frames are automatically detected by observing transitions of an indicator in the ATM cell header unique to AAL5 traffic. Automatic detection of AAL5 traffic allows enablement of packet discard techniques such as PPD and EPD.
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