Patent ID: 6813413
Filing Date: 2004-11-02
Classification: H04J,H04L,H04Q

Abstract:
A method of reconfiguring a ring optical network, the ring optical network formed of a single optical fiber (100) and including at least one traffic concentrator (120) and at least one station (140) optically connected to said fiber, the method comprising the steps of:sending from said concentrator a light signal over said fiber at a first wavelength from a first group of wavelengths comprising at least one wavelength (110) and receiving at said concentrator a light signal from said fiber at a second wavelength different from said first wavelength from a second group of wavelengths comprising at least one wavelength (150), said concentrator simultaneously sending to and receiving from said at least one station via both ends of said fiber (121, 122) on wavelengths in said first group of wavelengths and on wavelengths in said second group of wavelengths; said method further comprising the steps of: creating a virtual break (170) on said fiber between said at least one station and said concentrator (120) when said network is established; and on detection of a real break (205) in the fiber, shifting (271, 272) said virtual break so that it coincides with said real break (272), so as to re-establish the traffic between said concentrator and said at least one station; and wherein said virtual break is created between two of said stations (140, 160) farthest away from said concentrator.