System and method of multi-nodal APS control protocol signaling

Details System and method of multi-nodal APS control protocol signaling System and method of multi-nodal APS control protocol signaling

2006-04-27

2010-02-09

Ferris, Derrick W (Department: 2416)

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

Reexamination Certificate

active

07660236

ABSTRACT:
A system and method for providing APS (automatic protection switching) redundant pair control protocol signaling for multi-nodal APS (MN-APS) is provided. Periodic liveliness messages are exchanged between each node of a redundant pair. Each liveliness message contains an IHY (I heard you) message which indicates whether or not the sender of the liveliness message received within a duration of a hold time a previously transmitted liveliness message from the recipient. When more than one MN-APS group is configured between two redundant nodes, liveliness messages are bundled together to reduce processing loads.

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