Patent ID: 8068483

Claim:
A method for migration between a permanent connection and a switched connection in a transmission network, the method comprising: a) after receiving a first message of connection migrating request, sending, by an ingress node of a current connection, a second message of the connection migrating request node by node in a direction of traffic signal transmission of the current connection starting from the ingress node until an egress node of the current connection; and b) making migration between the permanent connection and the switched connection node by node after receiving the second message of the connection migrating request, wherein the step of sending the second message of the connection migrating request and the step of making the migration are performed by a control plane of a node and the second message of the connection migrating request is transferred via a plurality of control links, and wherein a migration from the permanent connection to the switched connection in the step of making the migration between the permanent connection and the switched connection comprises: creating a state of the switched connection on the control plane of the node and handing over cross-connections of the permanent connection at node to the control plane.