Network Modeling, Service Provisioning, and Service Management

• US 20130010637A1
• Filed: 07/05/2011
• Published: 01/10/2013
• Est. Priority Date: 07/05/2011
• Status: Active Grant

• Current Assignee: Ciena Corporation
• Original Assignee: Ciena Corporation
• Inventors: Davison, Eric
• Granted Patent: US 8,665,752 B2
• Time in Patent Office: Days
• US Class Current: 370/254
• CPC Class Codes: H04L 41/12 Discovery or management of network topologies
• CPC Class Codes: H04L 41/14 Network analysis or design

Abstract

Methods and devices for network modeling, service provisioning, and service management are disclosed. A network modeling method includes accessing information describing a set of nodes of a communications network, physical links physically connecting the nodes, and logical links logically connecting the nodes using the physical links. The method further includes, based on the information, creating a different connection group object for each of the physical links and for each of the logical links. Each connection group object includes a connection representing the link, a first endpoint representing a first node of the set connected to the link; and a second endpoint representing a second node of the set connected to the link.

Claims

1. A network modeling method comprising:

accessing information describing a set of nodes of a communications network, physical links physically connecting the nodes, and logical links logically connecting the nodes using the physical links;

based on the information, creating a different connection group object for each of the physical links and for each of the logical links, each connection group object comprising;

a connection representing the link;

a first endpoint representing a first node of the set connected to the link; and

a second endpoint representing a second node of the set connected to the link; and

using at least one of the connection group objects to configure an operating behavior of at least one of the nodes of the network.

2. The method of claim 1 wherein at least one of the logical links is a redundant logical link joining two of the nodes.

3. The method of claim 2 wherein the redundant logical link has one primary path and only one redundant path.

4. The method of claim 2 wherein the redundant logical link comprises three or more redundant paths joining the two nodes.

5. The method of claim 1 wherein one of the logical links is supported by two or more of the physical links and the connection group object representing the one logical link comprises fields identifying the connection group objects of the two or more physical links supporting the one logical link.

6. The method of claim 1 wherein each connection group object represents a different single one of the links.

7. The method of claim 1 wherein each connection group object further comprises one or more resource fields describing resources of the connection of the connection group object and attributes of communication facilitated by the connection.

8. The method of claim 8 further comprising determining resource consumption of all or part of the network by examining the one or more resource fields of one or more of the connections of the connection group objects.

9. A service provisioning method comprising:

accessing a plurality of connection group objects representing physical links and logical links that connect a set of nodes of a communications network, each connection group object comprising two endpoints representing two nodes of the set joined by the link represented by the connection group object;

creating a service object representing a communications service between a first node of the network and a second node of the network;

determining a first set of one or more of the connection group objects that together provide logical connectivity between the first node and the second node and identifying the first set of the connection group objects as supporting services of the service object;

determining a second set of one or more of the connection group objects that together provide connectivity between the endpoints of the first set of connection group objects and identifying the second set of the connection group objects as supporting services of the first set of connection group objects; and

allocating resources of the links represented by the first and second sets of connection group objects to the communications service.

10. The method of claim 9 wherein the determining of the first set comprises selecting the first set based on one or more criteria related to attributes of the links and the resources of the links.

11. The method of claim 9 wherein the allocating of the resources comprises recursively allocating resources of the supporting services of the service object to the communications service then allocating the supporting services of the supporting services of the services object to the communications service then allocating the supporting services of the supporting services of the supporting services of the communications service to the communications service.

12. The method of claim 9 wherein the second set of the connection group objects together provide logical connectivity between the endpoints of the first set of the connection group objects.

13. The method of claim 9 wherein the second set of the connection group objects together provide physical connectivity between the endpoints of the first set of the connection group objects.

14. The method of claim 9 wherein the link of a first one of the connection group objects of the first set connects the first node to an intermediate node and the link of another of the connection group objects of the first set connects the intermediate node to the second node.

15. The method of claim 9 wherein at least one of the logical links connects two of the nodes by traversing one or more of the other nodes of the network.

16. The method of claim 9 wherein each physical link connects two of the nodes without traversing any other of the nodes.

17. The method of claim 9 wherein the resources comprise identifiers used to encapsulate data packets carried by the links.

18. A service management method comprising:

establishing a communications service between an originating node of a communications network and a terminating node of the network by;

associating one or more first objects with the service, the one or more first objects representing logical links joining nodes of the network;

associating one or more second objects with the first objects, the second objects representing physical links joining endpoints of the logical links; and

allocating resources of the first objects and the second objects to the service; and

responsive to a request to terminate the service, deallocating at least some of the resources without disrupting the association between the service and the first and second objects.

19. The method of claim 18 further comprising responsive to a request to reinstate the service, allocating resources of the first objects and the second objects to the service.

20. The method of claim 18 wherein the deallocating comprises deallocating without disrupting the association between the first objects and the second objects.