Patent ID: 6701085
Filing Date: 2004-03-02
Classification: H04J

Abstract:
A method for data transmission in a bi-directional working channel between a plurality of terminals of an optical ring network that enables a protection connection, when a disturbance of the data transmission occurs, via undisturbed sections of the optical ring network for a wavelength-division multiplex method executed in the working channel, wherein a single bi-directional protection channel comprised of a predetermined wavelength range and at least a transmission capacity of the working channel connects all of the plurality of terminals to one another, the method comprising:detecting whether a malfunction of a working line/trunk assembly of the two neighboring terminals has occurred; switching data transmission to an allocated protection line/trunk module when a malfunction is detected such that connection via the working channel is maintained; and detecting whether a disturbance in a line section between two neighboring terminals of the plurality of terminals has occurred; and establishing a protection connection in the bi-directional protection channel between the two neighboring terminals via undisturbed sections of the optical ring network when disturbance of the line section is detected wherein the protection channel is looped through unaffected terminals of the plurality of terminals.