Patent ID: 9380359
Filing Date: 2016-06-28
CPC Classification: H04Q

Claim Text:
1. A method of service migration in an automatically switched optical network, comprising: when a migration node receiving a migration indication message, the migration node sending a cross information checking request to a transport plane; when the migration node receiving a cross information checking success message, the migration node performing a slot resource migration; and the migration node judging whether itself is a destination node of the present service migration; wherein if it is determined to be yes, a cross connection migration is performed directly; otherwise, the cross connection migration is performed after the migration node receiving an indication signaling which is sent by a downstream node and carries a cross connection migration scene; wherein the source node firstly performs the slot resource migration of its own after receiving the migration command, and then sends the Path signaling to the downstream node; when the downstream node receives the Path signaling which carries the migration scene, it performs the slot resource migration until the destination node in the downstream nodes completes the slot resource migration; after the destination node completes the slot resource migration, it returns the Resv signaling to the upstream node and notifies the upstream node to perform the cross connection migration until the source node sends the refreshed Path signaling to the downstream node after the source node completes the cross connection migration, the downstream node changes the current signal scene to the connection establishment scene, and the migration operation ends; the following state is designed during the migration from PC to SPC to ensure the reliability of the migration: when a current migration node determines that the signal scene carried in a received signaling is a migration scene from PC to SPC; and the connection goes into state S if a cross information checking succeeds and a slot resource migration is performed, the connection is changed from state S after a downstream migration success signaling is received, a cross connection migration is started; if the cross connection migration succeeds, the connection goes into state S wherein the state S