Patent ID: 8554073

Claim:
A method for migrating a Sub-Network Connection Protection (SNCP) service, which is used in an Automatically Switched Optical Network (ASON), comprising: receiving a migration request of an SNCP service; respectively setting cross status control bits of a current operation connection and a correlative connection thereof according to the received migration request, and performing collective migration of the current operation connection and the correlative connection thereof according to the set cross status control bits; and respectively modifying the cross status control bits of the current operation connection and the correlative connection thereof according to a migration result, wherein the migration request comprises either a Permanent Connection (PC) to Soft Permanent Connection (SPC) migration request or a SPC to PC migration request, and wherein the cross status control bits comprise: a cross setting status bit which is used for determining timing of cross connection migration in a serial mechanism or a parallel mechanism, and an actual cross status bit which is used for identifying an actual status of a current cross.