ODUK loop planning method and device for POTN (Packet Optical Transport Network) network

The invention discloses an ODUK loop planning method and device for a POTN (Packet Optical Transport Network) network. The planning method specifically comprises the following steps: acquiring a physical topology and a ring network topology; acquiring the node information of a ring network service needing ring network protection, and performing pathfinding on the ring network topology according to the node information of the ring network service; when pathfinding on the ring network topology fails, looking for a shortest path on which two nodes are separated from each other on a set graph of the physical topology and the ring network topology; and constructing an ODUK loop of the ring network service according to the shortest path on which two nodes are separated from each other, and updating the ODUK loop into the ring network topology. Through adoption of the method, the ring network construction quantity can be greatly reduced. Meanwhile, the use of wavelengths is reduced, and network resources are saved.