Patent ID: 9602427
Date: 2017-03-21
CPC Classifications: G06F,H04L

Claim:
1. A method for embedding cloud demands with shared protection in a software-defined flexible-grid optical transport network, the method comprising: in an optical transport software defined network having flexibility and programmability in transmission and switching network elements including transponders and reconfigurable optical add-drop multiplexers (ROADMs); managing optical channels with flexible-grid channel mapping; extracting control plane intelligence from a physical hardware to an optical-defined controller; mapping working virtual nodes of the cloud demands over physical nodes of the network; mapping backup virtual nodes of the cloud demands over the physical nodes; mapping working virtual links of the cloud demands over physical routes of the network; mapping backup virtual links of the cloud demands over the physical routes, wherein said mapping steps are performed by the optical-defined controller including a processor, and wherein the physical routes comprise node-disjoint physical routes and non-node-disjoint physical routes, and said step of mapping working virtual links over physical routes comprises mapping the working virtual links over the node-disjoint physical routes with a higher probability than over the non-node-disjoint physical routes to maximize sharing of backup resources among the backup virtual links.