Systems and methods for absolute route diversity for mesh restorable connections
AssigneeCiena Corporation
InventorsWaseem Reyaz Khan, Vagish Madrahalli
Life of this patent
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Abstract
The present disclosure provides absolute route diversity (ARD) for mesh restorable sub-network connection protection (MR-SNCP) services. ARD addresses concerns in MR-SNCP by providing absolute path diversity between both paths (e.g., peer Sub Network Connections (SNCs)) of an MR-SNCP connection. If an ARD condition is not met, the peer SNC is not mesh restored and the MR-SNCP works with just one single SNC. The advantage of this approach is to reuse the bandwidth saved from ARD for other MR-SNCP, i.e. more efficient bandwidth utilization due to ARD for other MR-SNCPs, and better service quality guarantee (protection) in terms of planning and managing the network bandwidth.
Claims20
A switch configured to provide Absolute Route Diversity for Mesh Restorable connections, the switch comprising:
- one or more line interfaces;
- a control module configured to operate a control plane and to control the one or more line interfaces;
- and
- a Mesh Restorable Sub Network Connection Protection service comprising a first leg and a second leg, wherein the Mesh Restorable Sub Network Connection Protection service is provided through the one or more line interfaces;
- wherein the control module ensures Absolute Route Diversity for each of the first leg and the second leg;
- wherein, if the control module cannot ensure Absolute Route Diversity for each of the first leg and the second leg, the first leg and the second leg are treated together as a single Sub Network Connection for purposes of mesh restoration thereby ensuring Absolute Route Diversity therebetween;
- and
- wherein a protection path is computed upon a failure.
A method for providing Absolute Route Diversity for Mesh Restorable connections, the method comprising:
- provisioning a Mesh Restorable Sub Network Connection Protection service comprising a first leg and a second leg;
- determining Absolute Route Diversity of a path for the first leg responsive to a trigger event;
- if Absolute Route Diversity is valid, setting up the path;
- and
- if Absolute Route Diversity is invalid, operating the path as a Sub Network Connection;
- wherein, if Absolute Route Diversity is invalid, the first leg and the second leg are treated together as a single Sub Network Connection for purposes of mesh restoration thereby ensuring Absolute Route Diversity therebetween;
- and
- wherein a protection path is computed upon a failure.
A network with Absolute Route Diversity for Mesh Restorable connections, the network comprising:
- a plurality of nodes;
- a plurality of links interconnecting the plurality of nodes
- a control plane between the plurality of nodes;
- an ingress node of the plurality of nodes;
- an egress node of the plurality of nodes;
- a Mesh Restorable Sub Network Connection Protection service originating at the ingress node and terminating at the egress node, the Mesh Restorable Sub Network Connection Protection service comprising a first leg and a second leg, wherein the first leg and the second leg each diversely traverse the plurality of links;
- and
- Absolute Route Diversity validation logic configured to determine if a path for the first leg is bundle and link diverse from the second leg responsive to a trigger event;
- wherein, if the Absolute Route Diversity validation logic cannot determine that the path for the first leg is bundle and link diverse from the second leg, the first leg and the second leg are treated together as a single Sub Network Connection for purposes of mesh restoration thereby ensuring Absolute Route Diversity therebetween;
- and
- wherein a protection path is computed upon a failure.
Dependencies are inferred from the claim text.