Service protection method and device based on automatic switched optical network
AssigneeZte Corporation
InventorHao Chen
Life of this patent
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Abstract
The present invention discloses a service protection method and device based on an automatic switched optical network (ASON), which are adapted to restoring a service when a fault occurs in the connection of the service. The method comprises: comparing a dynamic restoration lag time of the service with a protection switching lag time of the service; and starting a protection switching process to restore the service if the dynamic restoration lag time is greater than the protection switching lag time; and starting a dynamic re-routing process to restore the service if the protection switching lag time is greater than the dynamic restoration lag time. By the present invention, the reliability of the network is enhanced and the self-healing capacity of the ASON is improved.
Claims14
A service protection method based on an automatic switched optical network (ASON), used for restoring a service when a fault occurs in the connection of the service, comprising:
- comparing a dynamic restoration lag time of the service with a protection switching lag time of the service;
- and
- starting a protection switching process to restore the service if the dynamic restoration lag time is greater than the protection switching lag time;
- and starting a dynamic re-routing process to restore the service if the protection switching lag time is greater than the dynamic restoration lag time,
- wherein the step of starting the dynamic re-routing process to restore the service comprises:
- re-selecting a route and setting up a new connection for restoring the service;
- switching the service to the connection if the set-up of the new connection is successful;
- and
- starting the protection switching process to restore the service if the set-up of the new connection is failed.
A service protection device based on an ASON, used for restoring a service when a fault occurs in the connection of the service, comprising:
- a comparing module adapted to compare whether a dynamic restoration lag time of the service is greater than a protection switching lag time of the service;
- a first starting module adapted to start the protection switching process to restore the service if the dynamic restoration lag time is greater than the protection switching lag time;
- and
- a second starting module adapted to start the dynamic re-routing process to restore the service if the protection switching lag time is greater than the dynamic restoration lag time,
- wherein the operation of starting the dynamic re-routing to restore the service comprises:
- re-selecting a route and setting up a new connection for restoring the service;
- switching the service to the new connection if the set-up of the new connection is successful;
- and
- starting the protection switching process to restore the service if the set-up of the new connection is failed.
Dependencies are inferred from the claim text.