Cloud service embedding with shared protection in software-defined flexible-grid optical transport networks

摘要

A method and apparatus are provided for embedding cloud demands with shared protection in a software-defined flexible-grid optical transport network. The method includes mapping working virtual nodes of the cloud demands over physical nodes of the network. The method further includes mapping backup virtual nodes of the cloud demands over the physical nodes. The method also includes mapping working virtual links of the cloud demands over physical routes of the network. The method additionally includes mapping backup virtual links of the cloud demands over the physical routes. The mapping steps are performed by an optical-defined controller having a processor.

主权项

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.