Ethernet link state signaling for packet flows mapped into optical transport network with generic framing procedure

Patent metadata

Field	Value
Publication number	US-9825696-B2
Application number	US-201614994441-A
Country	US
Kind code	B2
Filing date	Jan 13, 2016
Priority date	Jan 13, 2016
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

Systems and methods of Ethernet link state signaling through a packet fabric with an Ethernet service transported over Optical Transport Network (OTN) utilizing Generic Framing Procedure Framed (GFP-F) mapping include demapping packets received from an OTN container over GFP-F; detecting a condition associated with the Ethernet service; and causing insertion of maintenance signals in OTN overhead based on the condition instead of using GFP-F Client Management Frames (CMF). The GFP-F mapping can be compliant to ITU-T Recommendation G.Sup43 (02/11) clause 6.2.

First claim

What is claimed is:

1. A method of Ethernet link state signaling through a packet fabric with an Ethernet service transported over Optical Transport Network (OTN) utilizing Generic Framing Procedure Framed (GFP-F) mapping, the method comprising:
demapping packets received from an OTN container over GFP-F;
detecting a condition associated with the Ethernet service; and
causing insertion of maintenance signals in OTN overhead based on the condition instead of using GFP-F Client Management Frames (CMF), wherein a receiving node detects the condition associated with the Ethernet service based on detection of the maintenance signals in the OTN overhead and performs associated actions on the Ethernet service.

2. The method of claim 1 , wherein the GFP-F mapping is compliant to ITU-T Recommendation G.Sup43 (02/11) clause 6.2.

3. The method of claim 1 , wherein the OTN container comprises an Optical channel Data Unit flex (ODUflex).

4. The method of claim 1 , wherein the OTN container comprises one of a High Order Optical channel Data Unit j (HO ODUj) and a Low Order Optical channel Data Unit i (LO ODUi).

5. The method of claim 1 , wherein the condition is a fault and the maintenance signals in the OTN overhead comprise one or more of a Lock (LCK) and a Backward Defect Indication (BDI).

6. The method of claim 1 , wherein the maintenance signals comprise one or more of an Optical channel Data Unit Open Connection Indication (ODU-OCI) and Optical channel Data Unit Alarm Indication Signal (ODU-AIS).

7. The method of claim 1 , wherein the maintenance signals comprise a Tandem Connection Monitor (TCM) provisioned for the Ethernet service between a head end node and a tail end node.

8. The method of claim 1 , wherein the Ethernet service is part of a Link Aggregation Group (LAG).

9. The method of claim 1 , wherein the maintenance signals signal one or of a local fault at the packet fabric and a remote fault at another packet fabric.

10. A packet fabric adapted for Ethernet link state signaling with an Ethernet service transported over Optical Transport Network (OTN) utilizing Generic Framing Procedure Framed (GFP-F) mapping, the packet fabric comprising:
circuitry adapted to demap packets received from an OTN container over GFP-F;
circuitry adapted to detect a condition associated with the Ethernet service; and
circuitry adapted to cause insertion of maintenance signals in OTN overhead based on the condition instead of using GFP-F Client Management Frames (CMF), wherein a receiving node detects the condition associated with the Ethernet service based on detection of the maintenance signals in the OTN overhead and performs associated actions on the Ethernet service.

11. The packet fabric of claim 10 , wherein the GFP-F mapping is compliant to ITU-T Recommendation G.Sup43 (02/11) clause 6.2.

12. The packet fabric of claim 10 , wherein the OTN container comprises an Optical channel Data Unit flex (ODUflex).

13. The packet fabric of claim 10 , wherein the OTN container comprises one of a High Order Optical channel Data Unit j (HO ODUj) and a Low Order Optical channel Data Unit i (LO ODUi).

14. The packet fabric of claim 10 , wherein the condition is a fault and the maintenance signals in the OTN overhead comprise one or more of a Lock (LCK) and a Backward Defect Indication (BDI).

15. The packet fabric of claim 10 , wherein the maintenance signals comprise one or more of an Optical channel Data Unit Open Connection Indication (ODU-OCI) and Optical channel Data Unit Alarm Indication Signal (ODU-AIS).

16. The packet fabric of claim 10 , wherein the maintenance signals comprise a Tandem Connection Monitor (TCM) provisioned for the Ethernet service between a head end node and a tail end node.

17. The packet fabric of claim 10 , wherein the Ethernet service is part of a Link Aggregation Group (LAG).

18. The packet fabric of claim 10 , wherein the maintenance signals signal one or of a local fault at the packet fabric and a remote fault at another packet fabric.

19. A network adapted for Ethernet link state signaling with an Ethernet service transported over Optical Transport Network (OTN) utilizing Generic Framing Procedure Framed (GFP-F) mapping, the network comprising:
a head end node;
a tail end node; and
an OTN cloud communicatively coupling the head end node and the tail end node;
wherein the head end node is adapted to map packets to an OTN container over GFP-F and the tail end node is adapted to demap the packets from the OTN container, and
wherein the head end node and the tail end node are each adapted to cause insertion of maintenance signals in OTN overhead based on detection of a condition instead of using GFP-F Client Management Frames (CMF), wherein either the head end node or the tail end node detect the condition associated with the Ethernet service based on detection of the maintenance signals in the OTN overhead and perform associated actions on the Ethernet service.

20. The network of claim 19 , wherein the GFP-F mapping is compliant to ITU-T Recommendation G.Sup43 (02/11) clause 6.2.

Assignees

• Yazar Onder
• Barr Kyle
• Beshara Maha
• Ciena Corp

Inventors

• Yazar Onder
• Barr Kyle
• Beshara Maha

Classifications

• H04B10/03 Primary

  Arrangements for fault recovery · CPC title

• H04B10/00 Primary

  Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication · CPC title

• H04L43/0811

  by checking connectivity · CPC title