Patent ID: 8953948
Filing Date: 2015-02-10
Classification: H04J

Abstract:
1. A method for synchronization and timestamp mapping in an optical network, comprising: classifying a first node as a master node and a second node as a slave node; performing a delay measurement between the master node and the slave node, the slave node determining a second time reference based on when the slave node responds to the delay measurement from the master node; upon completion of the delay measurement, sending from the master node a measured delay and a first time reference to the slave node, the delay comprising a measured delay between the master node and the slave node, and the time reference comprising a time when the master node receives the slave node's response to the delay measurement; utilizing the measured delay, the first time reference, and the second time reference by the master node and the slave node to determine a sequential order of events therebetween; operating a plurality of nodes in addition to the first node and the second node; defining a tree of ordered nodes comprising the plurality of nodes, the first node, and the second node; and performing the classifying, the performing, the sending, and the utilizing steps in a recursive manner through the tree to define a network-wide mapping between each of the plurality of nodes, the first node, and the second node.