Patent ID: 7099577

Claim:
A method for setting up at least one bidirectional connection path from a first optical network node to an N-th optical network node via at least one connection path section in an optical transmission system, the method comprising the steps of: determining an optical administration network node, which is responsible for assignment of bidirectional connection path channels on the at least one connected connection path section and which is connected to the respective connection path section, in each of the optical network nodes; transmitting a label request message, which contains a path identification number and a destination node address of the bidirectional connection path to be set up, in a transmission direction along the bidirectional connection path, in each case from one of the optical network nodes to the following optical network node; determining the bidirectional connection path channels available for the respective connection path section in the optical administration network node via the labels made available by an adaptation layer, with one available label being selected per connected connection path section, and a label which is selected for the connection path section between the administration network node and the following nonadministration network node is signaled to the nonadministration network node via the label request message; transmitting, in an opposite transmission direction along the bidirectional connection path, a label mapping message which contains a path identification number from one of the optical network nodes to the following optical network node, the label selected for the connection path section between the administration network node and the following nonadministration network node being signaled by the administration network node to the following nonadministration network node via the label mapping message; and switching the bidirectional connection path channel defined by the transferred label through to the optical nonadministration network node.