In-band signaling for network protection switching

摘要

Systems are disclosed for automated protection switching enabled by in-band signaling. A status monitor coupled to a switch fabric may be operable to read signal quality information from cells packet-switched over the fabric, the cells carrying traffic signals from one or more working channels between two network nodes. The status monitor may apply a protection algorithm to the signal quality information to determine whether a traffic signal on a working channel meets requirements indicative of channel failure or degradation sufficient to move the traffic signal to an additional protection channel between the two nodes. The status monitor may encode a request to transfer this traffic signal in cells switched by the fabric. In some examples, this request may be encoded in an optional user and fabric overhead field of cells consistent with the Optical-Transport Network (OTN) over Packet Fabric Protocol (OFP).