Optical communications – Fault recovery – Bypass inoperative element
Reexamination Certificate
2006-06-06
2009-12-29
Singh, Dalzid (Department: 2613)
Optical communications
Fault recovery
Bypass inoperative element
C398S005000, C398S059000
Reexamination Certificate
active
07639944
ABSTRACT:
A method for protecting a cross-ring service in an optical network includes the steps of: determining whether a configured working path crosses different rings; and in the case that the working path crosses different rings, establishing a cross-ring protection path which bypasses an off-ring node or an on-ring node of the working path on a ring, and binding the cross-ring protection path and the working path, wherein the cross-ring protection path and the working path is bound, and thus a protection can be implemented for the cross-ring service when the off-ring node or the on-ring node fails, with a reduced occupancy of bandwidth in comparison with the conventional DNI method.
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Huawei Technologies Co. Ltd.
Ladas & Parry LLP
Singh Dalzid
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