Protecting route design method in a communication network
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United States of America Patent
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-
Mar 6, 2007
Grant Date -
Sep 26, 2002
app pub date -
Aug 29, 2001
filing date -
Mar 21, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A protecting route design method is disclosed for a communication network including a plurality of nodes having preset information on a protecting route to switch over in parallel from a working route thereto when link or node failure occurs, according to a failure notification message including failure location information being transmitted from a failure detection node to each node. The protecting route design method includes the steps of searching a protecting route which can minimize a transfer time of the failure notification message from the failure detection node; and then, updating the searched protecting route to a protecting route having a spare communication capacity sharable for a different failure and having a route switchover time to be completed within a given time limit.
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