Flexible ethernet operations, administration, and maintenance systems and methods

Patent metadata

Field	Value
Publication number	US-10931554-B2
Application number	US-201916522392-A
Country	US
Kind code	B2
Filing date	Jul 25, 2019
Priority date	Jun 30, 2015
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

A node includes circuitry configured to interface a stream of encoded blocks with the blocks including i) data blocks from one or more clients and ii) overhead blocks, wherein a calendar is utilized for block distribution in the stream of encoded blocks; and circuitry configured to process one or more Operations, Administration, and Maintenance (OAM) fields in the overhead blocks, wherein the OAM fields are associated with the one or more clients in the data blocks.

First claim

What is claimed is:

1. A node comprising:
circuitry configured to interface a sequence of encoded blocks with the blocks including i) data blocks from one or more clients and ii) overhead blocks, wherein a calendar is utilized for block distribution in the sequence of encoded blocks; and
circuitry configured to process one or more Operations, Administration, and Maintenance (OAM) fields in the overhead blocks, wherein the one or more OAM fields are associated with the one or more clients that are associated with the data blocks.

2. The node of claim 1 , wherein the one or more OAM fields use a multiframe scheme with the overhead blocks switched along with slots of the calendar over a respective client path.

3. The node of claim 2 , wherein the node is a network element in a transport network.

4. The node of claim 1 , wherein the circuitry configured to process is configured to process a respective client service error monitoring field in the one or more OAM fields to detect errors over a respective client path.

5. The node of claim 4 , wherein the respective client service error monitoring field is a bitstream Bit Interleaved Parity (BIP) code.

6. The node of claim 4 , wherein the node is one of a switch and a router where the respective client service originates or terminates.

7. The node of claim 4 , wherein the monitoring field provides an error check for the respective client instead of a Cyclic Redundancy Check (CRC) at a packet level.

8. The node of claim 1 , wherein the circuitry configured to process is configured to process any of a connectivity/trace, link fault, remote fault, maintenance states, test signals, link neighbor discovery, and backwards fault and error indication, in the one or more OAM fields.

9. The node of claim 1 , wherein the sequence of encoded blocks is based on 64b/66b encoding.

10. A method comprising:
interfacing a sequence of encoded blocks with the blocks including i) data blocks from one or more clients and ii) overhead blocks, wherein a calendar is utilized for block distribution in the sequence of encoded blocks; and
processing one or more Operations, Administration, and Maintenance (OAM) fields in the overhead blocks, wherein the one or more OAM fields are associated with the one or more clients that are associated with the data blocks.

11. The method of claim 10 , wherein the one or more OAM fields use a multiframe scheme with the overhead blocks switched along with slots of the calendar over a respective client path.

12. The method of claim 11 , wherein the method is performed in a network element in a transport network.

13. The method of claim 10 , wherein the processing comprises processing a respective client service error monitoring field in the one or more OAM fields to detect errors over a respective client path.

14. The method of claim 13 , wherein the respective client service error monitoring field is a bitstream Bit Interleaved Parity (BIP) code.

15. The method of claim 13 , wherein the method is performed in one of a switch and a router where the respective client service originates or terminates.

16. The method of claim 13 , wherein the monitoring field provides an error check for the respective client instead of a Cyclic Redundancy Check (CRC) at a packet level.

17. The method of claim 10 , wherein the processing comprises processing any of a connectivity/trace, link fault, remote fault, maintenance states, test signals, link neighbor discovery, and backwards fault and error indication, in the one or more OAM fields.

18. The method of claim 10 , wherein the sequence of encoded blocks is based on 64b/66b encoding.

19. A non-transitory computer-readable medium comprising instructions that, when executed, cause a processor to perform the step of:
responsive to interfacing a sequence of encoded blocks with the blocks including i) data blocks from one or more clients and ii) overhead blocks, wherein a calendar is utilized for block distribution in the sequence of encoded blocks, processing one or more Operations, Administration, and Maintenance (OAM) fields in the overhead blocks, wherein the OAM fields are associated with the one or more clients that are associated with the data blocks.

20. The non-transitory computer-readable medium of claim 19 , wherein the one or more OAM fields use a multiframe scheme with the overhead blocks switched along with slots of the calendar over a respective client path.

Assignees

• Ciena Corp

Inventors

• Gareau Sebastien

Classifications

• H04L43/10 Primary

  Active monitoring, e.g. heartbeat, ping or trace-route · CPC title

• H04J3/1658

  carrying packets or ATM cells; (H04J3/1664 takes precedence for payloads with different packet types) · CPC title

• H04L43/0811

  by checking connectivity · CPC title

• H04J2203/0057

  Operations, administration and maintenance [OAM] · CPC title

• H04J2203/0085

  Support of Ethernet · CPC title