| 摘要 |
An apparatus and method for protection switching in a packet transport network are provided. The apparatus includes a hardware unit and a software unit, wherein, the hardware unit includes an Operation, Administration and Maintenance (OAM) packet receiving and transmitting module, an alarm detecting module, an exchange processing module, an alarm propagating module and a protection group policy decision module; the software unit includes a protection group service support module and an OAM support module; for each service, the alarm propagating module judges, according to an OAM alarm detected by the alarm detecting module or a path failure condition of a service layer associated with the service, a path failure condition of a work path and a protection path associated with the service, and updates a protection group where the service is located in the protection group policy decision module; for each obtained path failure condition, the protection group policy decision module determines a switching policy decision according to a protection mode, and notifies the exchange processing module of the switching policy decision; and the OAM support module transmits OAM configuration information to the OAM packet receiving and transmitting module, and instruct the OAM packet receiving and transmitting module to receive and transmit OAM messages according to the OAM configuration information. |
