Method and node apparatus for traffic protection in optical...

Optical communications – Fault recovery – Bypass inoperative element

Reexamination Certificate

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Details

C398S004000, C398S012000, C398S019000

Reexamination Certificate

active

07936990

ABSTRACT:
Disclosed is a method and node apparatus for traffic protection of Optical Transport Network (OTN), including: setting a part of channels in one fiber as working channels used for carrying traffic in need of protection, and setting a part of channels in the other fiber with a reverse transmission direction as protection channels, the number of which is equal to that of the working channels, to form a one-to-one protection for the working channels; when a failure in an optical line of OTN is detected, determining a bridging node and a switching node in accordance with pre-designated protection strategy, bridging and switching the traffic to be transmitted through the failed optical line between the working channels and the protection channels at the determined bridging node and switching node. This invention can realize OTN protection based on two-Fiber OMS shared protection ring, and improve the transmission reliability of optical networks.

REFERENCES:
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International Preliminary Report on Patentability for International Application No. PCT/CN2005/001406, dated Mar. 6, 2007.
International Search Report for International Application No. PCT/CN2005/001406, dated Dec. 8, 2005.
Written Opinion for International Application No. PCT/CN2005/001406, dated Dec. 8, 2005.

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