A method for more efficient data transmission in a wavelength division multiplexed (WDM) optical telecommunications network of different optical wavelengths, the optical telecommunications network having a first higher-level network node, a second higher-level network node, and further comprising a plurality of network elements, optical telecommunications network, computer program and computer program product

摘要

A method for more efficient data transmission in an optical telecommunication network (100) in wavelength division multiplexed operation of different optical wavelengths, the optical telecommunication network (100) having a first parent network node (R2), a second parent network node (R2 ') and further a plurality of Network elements (R1-1, R1-2), wherein the plurality of network elements (R1-1, R1-2) at least a first network element (R1-1) and a second network element (R1-2), wherein the telecommunications network ( 100) has an optical transmission path (150), wherein the optical transmission path (150) the first parent network node (R2) and the first network element (R1-1) and the first network element (R1-1) and the second network element (R1-2 ) and furthermore the second network element (R1-2) and the second superordinate network node (R2 ') directly or indirectly connects to each other, wherein the optical transmission path (150) also the ers the higher-order network node (R2) and the second superordinate network node (R2 '), so that the optical transmission path (150) is topologically closed annularly, whereby the annularly closed optical transmission path (150) - between the first network element (R1- 1) and the first superordinate network node (R2) in the direction from the first network element (R1-1) to the first superordinate network node (R2), a first signal path (151), - between the first network element (R1-1) and the second parent Network node (R2 ') in the direction of the first network element (R1-1) to the second parent network node (R2'), a second signal path (152), wherein the second signal path (152) additionally from the second parent network node (R2 ') to the first parent Network node (R2) runs, - between the second network element (R1-2) and the first parent network node (R2) in the direction of the second network element (R1-2) to the first übergeor dneten network node (R2) a third signal path (153) runs and - between the second network element (R1-2) and the second parent network node (R2 ') in the direction of the second network element (R1-2) to the second parent network node (R2' ), the fourth signal path (154) additionally extends from the second superordinate network node (R2 ') to the first superordinate network node (R2), wherein on the optical transmission path (150) the first and second signal paths (151, 152) and the third and fourth signal paths (153, 154) are each disjoint and complement each other to the optical transmission path (150) and wherein a first optical signal (S1) from the first network element (R1-1) to the first parent network node (R2) both via the first signal path (151) and via the second signal path (152) and a second optical signal (S2) from the second network element (R1-2) to the first superordinate network node (R2) both via the third Signal path (153) and via the fourth signal path (154) is transmitted, wherein the optical telecommunication network (100) is operable in a plurality of operating modes, wherein the plurality of operating modes at least one normal operating mode and at least a first and a second error fall operating mode, wherein the first higher-level network node (R2) has a first wavelength-selective switch (111) with respect to the first and third signal paths (151, 153) and a second wavelength-selective switch (112) with respect to the second and fourth signal paths (152, 154), the first and third signal paths second wavelength-selective switches (111, 112) have first outputs (115) such that each of the first outputs (115) is associated with one of the plurality of operating modes of the optical telecommunications network (100), and wherein the method comprises the step of: Operating mode of the optical telecommunications network (100) by the he the first outputs (115) for receiving the first optical signal (S1) and the second optical signal (S2) is evaluated, wherein-- between the first and second network nodes (R2) of the respective operating mode of the optical telecommunication network (100) parent network node (R2) and the first network element (R1-1) in the direction from the first parent network node (R2) to the first network element (R1-1) a fifth signal path (155), - between the first parent network node (R2) and the first network element (R1-1) in the direction from the first superordinate network node (R2) via the second superordinate network node (R2 ') to the first network element (R1-1) has a sixth signal path (156), - between the first superordinate network node ( R2) and the second network element (R1-2) in the direction of the first parent network node (R2) to the second network element (R1-2) a seventh signal path (157) extends, and-- between the first überge arranged network node (R2) and the second network element (R1-2) in the direction from the first parent network node (R2) via the second parent network node (R2 ') to the second network element (R1-2) an eighth signal path (158) extends, wherein the optical transmission path (150) of the fifth and sixth signal path (155, 156) and the seventh and eighth signal path (157, 158) are each disjoint and complement each other to the optical transmission path (150) and wherein a third optical signal (S3) from the first superordinate network node (R2) to the first network element (R1-1) both via the fifth signal path (155) and via the sixth signal path (156) and a fourth optical signal (S4) from the first superordinate network node (R2) to the second network element ( R1-2) is transmitted both via the seventh signal path (157) and via the eighth signal path (158), the second superordinate network node (R2 ') having respect to the sixth and eighth signal paths (156, 158) ei NEN fourth wavelength-selective switch (114), wherein the method comprises the step that the second optical network node (R2 '), the third optical signal (S3) and / or the fourth optical signal (S4) to the first and / or second network element (R1-1, R1-2), characterized in that the fourth wavelength-selective switch (114) has second outputs (116) such that each of the second outputs (116) has one of the plurality of operating modes of the optical telecommunications network (100). assigned.