Selective protection for ring topologies

Details Selective protection for ring topologies Selective protection for ring topologies

2005-05-10

2005-05-10

Beausoliel, Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S004110, C714S717000, C709S251000, C370S224000

Reexamination Certificate

active

06892329

ABSTRACT:
A method for fault protection in a bidirectional ring network includes transmitting first and second flows of packets around the bidirectional ring network while defining the first flow as a wrapping flow and the second flow as a non-wrapping flow. Upon detection by a node in the network that a segment of the network proximal to the node has failed, the packets in the first flow are wrapped at the node between clockwise and counterclockwise directions on the network so as to avoid the failed segment, while the packets in the second flow are not wrapped.

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patent: 1 052 808 (2000-11-01), None
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Harrera et al., “A Framework for IP over Packet Transport Rings”, Internet Draft, draft-ietf-ipoptr-framework-00, Jun. 2001.
D. Tsiang et al., Request for Comments (RFC) 2892 of the Internet Engineering Task Force (IETF), Aug. 2000.

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