Utilizing bandwidth in ring network using path cost and protection techniques
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United States of America Patent
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Jun 7, 2011
Grant Date -
Jun 4, 2009
app pub date -
Nov 25, 2008
filing date -
Mar 3, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The disclosed network includes two rings, wherein a first ring transmits data in a clockwise direction, and the other ring transmits data in a counterclockwise direction. The traffic is removed from the ring by the destination node. During normal operations (i.e., all spans operational), data between nodes can flow on either ring. Thus, both rings are fully utilized during normal operations. The nodes periodically test the bit error rate of the links (or the error rate is constantly calculated) to detect a fault in one of the links. The detection of such a fault sends a broadcast signal to all nodes to reconfigure a routing table within the node so as to identify the optimum routing of source traffic to the destination node after the fault.
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