Claims
- 1. A method of non-disruptively modifying the routing of lightpaths in an optical mesh network by employing a bridge and roll technique in combination with the use of temporary path protection to change the routing of selected lightpaths.
- 2. The method as defined in claim 1 wherein the bridge and roll technique is employed with the lightpath in service.
- 3. The method as defined in claim 2 wherein the selected lightpath is a working lightpath.
- 4. The method as defined in claim 2 wherein the selected lightpath is a protection lightpath.
- 5. The method as defined in claim 1 wherein the mesh network operates in a wave division multiplex (WDM) mode.
- 6. The method as defined in claim 1 wherein the bridge and roll technique is operator directed.
- 7. The method as defined in claim 1 wherein the routing of the selected lightpath is employed in a single segment, single hop implementation.
- 8. The method as defined in claim 4 wherein the routing of the selected protection lightpath is employed in a multi-hop, end to end configuration.
- 9. The method as defined in claim 1 wherein a network management system is employed to implement route modifications.
- 10. The method as defined in claim 9 wherein the network management system requests a lightpath routing modification.
- 11. A system for non-disruptively modifying the routing of lightpaths in an optical mesh communication network, the system comprising:
means to implement a bridge and roll protocol wherein temporary paths are employed to change selected lightpaths without having to take the lightpath out of service.
- 12. The system as defined in claim 11 wherein lambda level switching means at end point nodes coordinate switching of connections from a working path to a protection path.
- 13. The system as defined in claim 11 wherein a network management system (NMS) implements the bridge and roll protocol.
- 14. The system as defined in claim 13 wherein the network management system creates single segment protection of a single hop path.
- 15. The system as defined in claim 13 wherein the network management system employs a multi hop protection scheme to protect a lightpath end to end.
- 16. A network management system (NMS) for use in an optical mesh communication network to modify, non-disruptively, the routing of a lightpath, the NMS comprising means to implement a bridge and roll protocol in combination with temporary path protection to change the routing of a selected lightpath while the lightpath remains in-service.
- 17. The NMS as defined in claim 16 which enables a user to create a protection segment group and a protection branch group.
- 18. The NMS as defined in claim 16 for creating protection branches and monitoring and switching lightpaths.
- 19. The NMS as defined in claim 18 for use in 1×1 and N×M segment protection.
Parent Case Info
[0001] This application claims benefit under 35 USC 119(e) of U.S. Provisional Application 60/404,769 filed Aug. 21, 2002.
Provisional Applications (1)
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Number |
Date |
Country |
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60404769 |
Aug 2002 |
US |