Claims
- 1. A method of providing bi-directional optical switched paths in an optical network, the method comprising the steps of:
providing a label request object for at least one bi-directional optical switched path (BOSP) tunnel; providing a label object for said at least one BOSP tunnel; detecting a reservation (RESV) message for said at least one BOSP; and allocating a pair of labels for a first outgoing path in a backward direction and for a second outgoing path in a forward direction upon detecting the RESV message.
- 2. The method of claim 1, wherein the pair of labels include a first fiber identification (fiber ID) for the first outgoing path and a second fiber ID for the second outgoing path.
- 3. The method of claim 1, wherein the pair of labels include a first wavelength identification (wavelength ID) for the first outgoing path and a second wavelength ID for the second outgoing path.
- 4. The method of claim 1, wherein the pair of labels include a first sub-channel identification (sub-channel ID) for the first outgoing path and a second sub-channel ID for the second outgoing path.
- 5. The method of claim 1 for communication between a plurality of optical nodes, further comprising the step of transmitting a path message by a first one of the nodes.
- 6. The method of claim 5, further comprising the step of transmitting the RESV message by a second one of the nodes.
- 7. The method of claim 6, wherein the steps of detecting the RESV message and allocating the pair of labels are performed by a third one of the nodes connected between the first node and the second node.
- 8. The method of claim 7, further comprising the step of providing a bi-directional label request for the third node upon receiving the path message.
- 9. The method of claim 8, further comprising the step of recording the bi-directional label request into a path state block (PSB) by the third node.
- 10. The method of claim 8, further comprising the steps of:
determining whether the pair of labels can be assigned for the first and second outgoing paths; and transmitting an RESV error message to the second node in response to the step of determining that the pair of labels cannot be assigned.
- 11. The method of claim 8, further comprising the step of transmitting a path tear message and a RESV tear message to delete the pair of labels.
- 12. The method of claim 5, wherein the optical nodes comprise routers.
- 13. The method of claim 12, wherein the routers comprise optical cross-connects (OXCs).
- 14. The method of claim 1, wherein the label request object includes a minimum port number, a maximum port number, a minimum wavelength number, a maximum wavelength number, a minimum sub-channel number, and a maximum sub-channel number.
- 15. The method of claim 1, wherein the pair of labels are allocated as an extension to resource reservation protocol-traffic engineering (RSVP-TE).
- 16. A method of providing bi-directional optical switched paths in an optical network, the method comprising the steps of:
providing a label request object for at least one bi-directional optical switched path (BOSP) tunnel; providing a label object for said at least one BOSP tunnel; detecting a reservation (RESV) message for said at least one BOSP; and allocating a pair of labels for a first incoming path in a backward direction and for a second incoming path in a forward direction upon detecting the RESV message.
- 17. The method of claim 16, wherein the pair of labels include a first fiber identification (fiber ID) for the first incoming path and a second fiber ID for the second incoming path.
- 18. The method of claim 16, wherein the pair of labels include a first wavelength identification (wavelength ID) for the first incoming path and a second wavelength ID for the second incoming path.
- 19. The method of claim 16, wherein the pair of labels include a first sub-channel identification (sub-channel ID) for the first incoming path and a second sub-channel ID for the second incoming path.
- 20. The method of claim 16 for communication between a plurality of optical nodes, further comprising the step of transmitting a path message by a first one of the nodes.
- 21. The method of claim 20, further comprising the step of transmitting the RESV message by a second one of the nodes.
- 22. The method of claim 21, wherein the steps of detecting the RESV message and allocating the pair of labels are performed by a third one of the nodes connected between the first node and the second node.
- 23. The method of claim 22, further comprising the step of providing a bi-directional label request for the third node upon receiving the path message.
- 24. The method of claim 23, further comprising the step of recording the bi-directional label request into a path state block (PSB) by the third node.
- 25. The method of claim 23, further comprising the steps of:
determining whether the pair of labels can be assigned for the first and second incoming paths; and transmitting an RESV error message to the second node in response to the step of determining that the pair of labels cannot be assigned.
- 26. The method of claim 23, further comprising the step of transmitting a path tear message and a RESV tear message to delete the pair of labels.
- 27. The method of claim 20, wherein the optical nodes comprise routers.
- 28. The method of claim 27, wherein the routers comprise optical cross-connects (OXCs).
- 29. The method of claim 16, wherein the label request object includes a minimum port number, a maximum port number, a minimum wavelength number, a maximum wavelength number, a minimum sub-channel number, and a maximum sub-channel number.
- 30. The method of claim 16, wherein the pair of labels are allocated as an extension to resource reservation protocol-traffic engineering (RSVP-TE).
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of U.S. Provisional Application Serial No. 60/218,359, filed Jul. 13, 2000.
Provisional Applications (1)
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Number |
Date |
Country |
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60218359 |
Jul 2000 |
US |