Asynchronous transfer mode (ATM) protection triggering method using "receive-AIS (alarm indication signal)" flag
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United States of America Patent
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Jun 25, 2002
Grant Date -
N/A
app pub date -
Aug 6, 1998
filing date -
Dec 3, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An asynchronous transfer mode (ATM) protection triggering method using 'received-AIS' flag determines whether the failure generation position is generated within a protected domain or not, by determining whether the 'received-AIS' flag is '0' in case that a node detecting a failure link transmits an end-to-end AIS cell to a downstream side node, and a source point passing the end-to-end AIS cell sets the 'received-AIS' flag to '1' and then receives 'AIS cell receiving' signal from a sink point of the protected domain, thereby obviating a CRC-10 calculation problem and a backward compatibility.
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