Method and System for Restoring Optical Layer Service
AssigneeZte Corporation
InventorGang LU
Life of this patent
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Abstract
The present document discloses a method and a system for restoring an optical layer service. The method includes: determining wavelength resource occupancy information of an inner-link of the node and an optical layer link where the node is located; herein the wavelength resource occupancy information includes resource occupancy state information of a wavelength resource corresponding to a Hold Priority; and flooding the wavelength resource occupancy information in a network where the node is located.
Claims15
A method for restoring an optical layer service, applied to a node, and the method comprising:
- determining wavelength resource occupancy information of an inner-link of the node and an optical layer link where the node is located;
- wherein, the wavelength resource occupancy information comprises resource occupancy state information of a wavelength resource corresponding to a Hold Priority;
- flooding the wavelength resource occupancy information of the inner-link of the node and the optical layer link where the node is located in a network where the node is located.
A method for restoring an optical layer service, applied to a route computation element, and the method comprising:
- determining a restoring Label Switched Path, LSP, of a service to be restored when the service requires to be restored;
- acquiring wavelength resource occupancy information of an inner-link of each node on the restoring LSP and wavelength resource occupancy information of each optical layer link on the restoring LSP;
- preempting a wavelength resource on the restoring LSP according to the wavelength resource occupancy information;
- and
- informing each node on the restoring path LSP to allocate a resource for the service to be restored after a wavelength resource satisfying a path connectivity requirement is preempted.
A system for restoring an optical layer service, applied to a node, and the system comprising:
- a wavelength resource statistics module configured to determine wavelength resource occupancy information of an inner-link of the node and an optical layer link where the node is located;
- wherein the wavelength resource occupancy information comprises resource occupancy state information of a wavelength resource corresponding to a Hold Priority;
- a flooding module configured to flood the wavelength resource occupancy information of the inner-link of the node and the optical layer link where the node is located, in a network where the node is located.
A system for restoring an optical layer service, applied to a route computation element, and the system comprising:
- a path computation module configured to determine a restoring Label Switched Path, LSP, of a service to be restored when the service requires to be restored;
- a wavelength resource information acquiring module configured to acquire wavelength resource occupancy information of an inner-link of each node on the restoring LSP and wavelength resource occupancy information of each optical layer link on the restoring LSP;
- a wavelength resource preempting module configured to preempt a wavelength resource on the restoring LSP according to the wavelength resource occupancy information;
- and
- a resource allocation module configured to inform each node on the restoring path LSP to allocate a resource for the service to be restored after a wavelength resource satisfying a path connectivity requirement is preempted.
Dependencies are inferred from the claim text.