Patent ID: 9008502
Filing Date: 2015-04-14
Classification: H04J

Abstract:
1. A method for protecting traffic of a plurality of work ODUs over a protect ODU (Optical Channel Data Units), said method comprising the steps of: detecting defects in at least one of a plurality of work ODUs; requesting for release of one or more time-slots for a defective work ODU; allocating the one or more time-slots from the protect ODU based on the request, wherein the one or more time slots are allocated in an incremental manner of priority; inputting a signal status of at least one of the plurality of work ODUs and the protect ODU; analyzing the availability of time-slots; dropping at least one of a plurality of low priority extra traffic client entities and protected work ODUs when free time-slots are not available; providing a list of free time slots for protecting the defective work ODU; and switching the traffic from the protect ODU for protecting the defective work ODU; signaling a bridge release request for the dropped low priority extra traffic client entities and the protected work ODUs; releasing a bridged traffic for the extra traffic client entities and the protected work ODUs on receiving the bridge release request; providing a bridge release indication; caching a signaling information on receiving the bridge release indication; signaling a bridge engage request to bridge traffic for the defective work ODU; requesting for a grant of free time-slots for the defective work ODU for which the bridge engage request is received; bridging the traffic for the defective work ODU on the protect ODU; signaling the bridging of traffic by sending a bridge engage indication; and switching the traffic of the defective work ODU from the protect ODU on receiving the bridge engage indication.