US 2006/0133803 A1 · Method and system for shared optical protection

Abstract

An optical network includes an optical ring capable of transmitting traffic in one of a plurality of wavelengths of an optical signal between a plurality of nodes. The nodes transmit a plurality of working traffic streams in a plurality of working wavelengths. In response to an interruption in a first working traffic stream, a node transmits, in a protection wavelength, a first protection traffic stream that is associated with the first working traffic stream. Furthermore, in response to an interruption in a second working traffic stream, a node transmits, in the protection wavelength, a second protection traffic stream that is associated with the second working traffic stream, such that the first protection traffic stream and the second protection traffic stream share, at different times, the protection wavelength.

Claims22

Dependent claims

A method for providing optical communication, comprising:

transmitting a plurality of working traffic streams in a plurality of working wavelengths on an optical ring, wherein the plurality of working traffic streams comprise a first working traffic stream transmitted in a first working wavelength and a second working traffic stream transmitted in a second working wavelength;
in response to an interruption in the first working traffic stream, transmitting a first protection traffic stream in a protection wavelength, the first protection traffic stream associated with the first working traffic stream;
and
in response to an interruption in the second working traffic stream, transmitting a second protection traffic stream in the protection wavelength, the second protection traffic stream associated with the second working traffic stream, such that the first protection traffic stream and the second protection traffic stream share, at different times, the protection wavelength.

1 more element

An optical network, comprising:

an optical ring coupling a plurality of nodes and operable to transmit working traffic streams between two or more nodes, each working traffic stream comprising traffic transmitted in one of a plurality of wavelengths of an optical signal;
the plurality of nodes, wherein one or more of the nodes is operable to:
transmit a plurality of working traffic streams in a plurality of working wavelengths on the optical ring, wherein the plurality of working traffic streams comprise a first working traffic stream transmitted in a first working wavelength and a second working traffic stream transmitted in a second working wavelength;
in response to an interruption in the first working traffic stream, transmit a first protection traffic stream in a protection wavelength, the first protection traffic stream associated with the first working traffic stream;
and
in response to an interruption in the second working traffic stream, transmit a second protection traffic stream in the protection wavelength, the second protection traffic stream associated with the second working traffic stream, such that the first protection traffic stream and the second protection traffic stream share, at different times, the protection wavelength.

3 more elements

A method for providing optical communication in an optical ring network comprising a plurality of nodes, comprising:

transmitting a plurality of working traffic pairs, each of the working traffic pairs including a first working traffic stream transmitted, in a first working wavelength of one of a plurality of working wavelength pairs, in a first direction between a particular pair of nodes and a second working traffic stream transmitted, in a second working wavelength of the working wavelength pair, in a second direction between the pair of nodes, wherein each of the plurality of working wavelength pairs includes a unique combination of two working wavelengths;
in response to an interruption in a first working traffic pair, transmitting a first protection traffic pair associated with the first working traffic pair, the first protection traffic pair including a first protection traffic stream transmitted, in a first protection wavelength of a protection wavelength pair, in a first direction between a pair of nodes transmitting the first working traffic pair and a second protection traffic stream transmitted, in a second protection wavelength of the protection wavelength pair, in a second direction between the pair of nodes transmitting the first working traffic pair;
and
in response to an interruption in a second working traffic pair, transmitting a second protection traffic pair associated with the second working traffic pair, the protection traffic pair including a third protection traffic stream transmitted, in the first protection wavelength, in a first direction between a pair of nodes transmitting the second working traffic pair and a fourth protection traffic stream transmitted, in the second protection wavelength, in a second direction between the pair of nodes transmitting the second working traffic pair, such that the first protection traffic stream and the third protection traffic stream share, at different times, the first protection wavelength and such that the second protection traffic stream and the fourth protection traffic stream share, at different times, the second protection wavelength.