Method and system to synchronize remote defect signaling and wavelength selective switch controls

• Main Authors: Ramachandran, Sanjeev, Rao, Rajan, Satbhaiya, Amit, Padala, Dileep, Ramanathan, Baranidhar, Satyarthi, Nikhil Kumar, Prakasam, Dinesh Kumar
• Format: Patent
• Language: English
• Published: 20.02.2020
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; MULTIPLEX COMMUNICATION; SELECTING

A system and method is disclosed in which circuitry of a first controller of a first node on a first path within a transport network receives a first signal indicating a failure within the first path from a second controller. The first node is an end node of the first path. A first client signal failure clear signal is received from a second node upstream of the first node on the first path. The first client signal failure clear signal indicates that a non-restorable fault has been resolved such that the first path can be considered for carrying data traffic. The non-restorable fault is a failure at the source. Subsequent to receiving the first signal indicating the failure within the first path, a backward defect indication clear signal is transmitted to the second node, the backward defect indication clear signal indicating an absence of a failure in the first path.