Administrative boundaries in single or multiple domain optical networks
The present disclosure provides systems and methods for administrative boundaries in a single domain optical network such as emulation of an External network-network interface (ENNI) using an Internal-Network to Network Interface (INNI). For example, in a single monolithic domain, a network and associated network elements may discover network elements, build topology, compute paths, establish new calls, etc. A user may identify/mark specific links as emulated “ENNI” links with the specific links actually being INNI links. As a call traverses this emulated link, a new call is initiated (much in the same way a new call segment would be created for a call). Signaling proceeds as normal. When the call set-up is fully complete, instead of a single call segment, many call segments exists. Advantageously, this allows use of INNI control plane features while allowing a network operator to future-proof their network by installing call segments at future boundary points.
1. A network, comprising:
a plurality of network elements;
a plurality of links interconnecting the plurality of network elements, wherein each of the plurality of links comprises an Internal-Network to Network Interface;
a control plane communicatively coupled to the plurality of network elements and the plurality of links; and
designations on one or more of the plurality of links defining an administrative boundary relative to call segmentation, wherein each of the plurality of links with the designations comprises an Internal-Network to Network Interface emulating an External network-network interface, and wherein the emulating comprises providing Internal-Network to Network Interface features over a link while treating the link as an External network-network interface for call segmentation.
2. The network of claim 1 , wherein the plurality of network elements are in a single, monolithic domain.
3. The network of claim 2 , wherein designations form emulated domains within the single, monolithic domain.
4. The network of claim 1 , wherein the control plane comprises one of Automatically Switched Optical Network (ASON), Generalized Multi-Protocol Label Switching (GMPLS), and Optical Signaling and Routing Protocol.
5. The network of claim 1 , further comprising:
controllers on each of the plurality of network elements, wherein the controllers are communicatively coupled to one another, and wherein the controllers are configured to perform call control to establish services between the plurality of network elements.
6. The network of claim 5 , wherein the controllers are configured to segment a call when traversing one of the plurality of links with the designations.
7. The network of claim 5 , wherein the controllers are configured to perform restoration on the plurality of links with the designations.
8. The network of claim 7 , wherein the restoration comprises segment restoration, and if segment restoration is unavailable or fails, the restoration comprises end-to-end restoration.
9. A method, comprising: forming an optical network between a plurality of network elements utilizing a control plane therebetween;
designating one or more links between the plurality of network elements as boundary links with respect to the control plane, wherein the plurality of networks are interconnected by Internal-Network to Network Interfaces and wherein the designated one or more links comprise an Internal-Network to Network Interface emulating an External network-network interface;
performing a call using the control plane;
at each of the designated one or more links, performing call segmentation for the call;
providing Internal-Network to Network Interface features across all links in the optical network; and
treating the designated one or more links as External network-network interfaces for call segmentation.
10. The method of claim 9 , wherein the plurality of network elements are in a single, monolithic domain.
11. The method of claim 10 , wherein boundary links form emulated domains within the single, monolithic domain.
12. The method of claim 9 , wherein the control plane comprises one of Automatically Switched Optical Network (ASON), Generalized Multi-Protocol Label Switching (GMPLS), and Optical Signaling and Routing Protocol.
13. The method of claim 9 , further comprising:
based on a failure on one of the one or more links, performing segment restoration; and if the segment restoration is not possible, performing end-to-end restoration.
14. A control processor, comprising:
circuitry disposed in a network element; and
a communications interface to a plurality of interconnected network elements to the network element;
wherein the circuitry is configured to
designate one or more links between the network element and the plurality of interconnected network elements as boundary links with respect to a control plane, wherein each of the one or more of links comprises an Internal-Network to Network Interface, wherein each of the designated one or more comprises an Internal-Network to Network Interface emulating an External network-network interface, and wherein the emulating comprises providing Internal-Network to Network Interface features over a link while treating the link as an External network-network interface for call segmentation;
perform a call using the control plane; and
at each of the designated one or more links, perform call segmentation for the call.
15. The control processor of claim 14 , wherein the control plane comprises one of Automatically Switched Optical Network (ASON), Generalized Multi-Protocol Label Switching (GMPLS), and Optical Signaling and Routing Protocol.
16. The control processor of claim 14 , wherein the network element and the plurality of interconnected network elements each comprise an optical switch operating Internal-Network to Network Interface features therebetween.
17. The network of claim 1 , wherein each of the plurality of network elements comprises an optical switch operating Internal-Network to Network Interface features therebetween.
18. The method of claim 9 , wherein each of the plurality of network elements comprises an optical switch operating Internal-Network to Network Interface features therebetween.