APPARATUS AND METHODS FOR ENABLING RECOVERY FROM FAILURES IN OPTICAL NETWORKS

摘要

Apparatus for enabling recovery from failures in up to M working paths of a set of N working paths that are allocated N frequency slots of L different slot widths, where M, N and L are positive integers, N≧L>1, and N>M>1. The apparatus includes a processor and a control plane interface. The processor is operative to allocate protection frequency slots to M protection paths in different manners depending on whether M is greater than L, equal to L or less than L. The control plane interface is operatively associated with the processor and is operative to effect provisioning of the M protection paths for supporting recovery from the failures. Related network, apparatus and methods are also disclosed.

主权项

1. Apparatus for enabling recovery from failures in up to M working paths of a set of N working paths that are allocated N frequency slots of L different slot widths, where M, N and L are positive integers, N≧L>1, and N>M>1, the apparatus comprising:
a processor operative to allocate protection frequency slots to M protection paths as follows: if ML, to allocate L protection frequency slots of slot widths corresponding to the L different slot widths to L of the M protection paths and to allocate M-L additional protection frequency slots of slot widths corresponding to at least one of the L different slot widths to the remaining M-L protection paths; and a control plane interface operatively associated with the processor and operative to effect provisioning of the M protection paths for supporting recovery from the failures.