Bandwidth advertisement systems and methods for optical transport network

摘要

A bandwidth advertisement update method in an optical network, an optical network, and a controller provide a configurable mechanism for bandwidth advertisement updates in a control plane providing flexibility and reducing bandwidth advertisements in the control plane while concurrently supporting aggregated connections. The bandwidth advertisement update method includes defining a plurality of bandwidth update threshold values for a plurality of bandwidth units supported on a link in the optical network, responsive to a change in available bandwidth on the link, sending a bandwidth advertisement if the available bandwidth for any of the plurality of bandwidth units is less than the associated bandwidth update threshold value, and responsive to a change in available bandwidth on the link, withholding the bandwidth advertisement if the available bandwidth for all of the plurality of bandwidth units is greater than or equal to the associated bandwidth update threshold value.

主权项

1. A bandwidth advertisement update method used in a control plane of an optical network, comprising:
defining a plurality of bandwidth update threshold values for a plurality of bandwidth units supported on a link in the optical network, wherein the plurality of bandwidth update threshold values are managed independently of one another, wherein the plurality of bandwidth units have different sizes, and wherein the link is a virtual object used by the control plane to represent one or more lines that are physical connections between nodes in the optical network and the plurality of bandwidth units are either on a same line or spread across more than one line; initially advertising a bandwidth advertisement comprising; the bandwidth update threshold values for each of the plurality of bandwidth units when no traffic is provisioned on the link; responsive to a change in available bandwidth on the link, sending a updated bandwidth advertisement if the available bandwidth for any of the plurality of bandwidth units is less than the associated bandwidth update threshold value for the link; and responsive to a change in available bandwidth on the link, withholding the bandwidth advertisement if the available bandwidth for all of the plurality of bandwidth units is greater than or equal to the associated bandwidth update threshold values.