Automatic bandwidth optimization for optical networks

• US 10,476,588 B2
• Filed: 04/13/2018
• Issued: 11/12/2019
• Est. Priority Date: 04/13/2018
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Gazzola, Maurizio, Piciaccia, Stefano, Ghioni, Lorenzo, Johnson, Ronald, Tanzi, Alberto Arnaldo, Adackaconam, Sushin Suresan
• Primary Examiner(s): Singh, Dalzid E
• Application Number:
  US15/952,345
• Publication Number:
  US 20190319702A1
• Time in Patent Office: 578 Days
• Field of Search: 398 26
• CPC Class Codes: H04B 10/073 using an out-of-service signal H04B10/071 takes precedence
• CPC Class Codes: H04B 10/075 using an in-service signal H04B10/071 takes precedence
• CPC Class Codes: H04B 10/07953 Monitoring or measuring OSNR, BER or Q
• CPC Class Codes: H04B 10/40 Transceivers
• CPC Class Codes: H04B 10/50 Transmitters
• CPC Class Codes: H04B 10/60 Receivers
• CPC Class Codes: H04J 14/0241 Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
• CPC Class Codes: H04J 14/0272 Transmission of OAMP information

Abstract

Techniques for automatic bandwidth optimization of an optical communication channel in an optical network are provided. In one embodiment, a method of automatically optimizing bandwidth includes receiving, at a first optical network element, a first signal transmission transmitted according to a first set of transmission parameters over an optical communication channel established between the first optical network element and a second optical network element. The method includes determining a first quality of signal parameter associated with the first signal transmission and determining whether the first quality of signal parameter is worse than a predetermined quality of signal value. Upon determining that the first quality of signal parameter is not worse than the predetermined value, the method further includes transmitting a second set of transmission parameters to the second optical network element to further optimize the bandwidth of the optical communication channel.

Claims

1. A method, comprising:

receiving, at a first optical network element, a first signal transmission over an optical communication channel established between the first optical network element and a second optical network element, wherein the first signal transmission is transmitted according to a first set of transmission parameters;

determining a first quality of signal parameter associated with the first signal transmission;

determining whether the first quality of signal parameter is worse than a predetermined quality of signal value;

upon determining that the first quality of signal parameter is not worse than the predetermined quality of signal value, transmitting a second set of transmission parameters for the optical communication channel from the first optical network element to the second optical network element, wherein the second set of transmission parameters are different than the first set of transmission parameters;

receiving a second signal transmission over the optical communication channel from the second optical network element according to the second set of transmission parameters; and

determining a second quality of signal parameter associated with the second signal transmission, the first set of transmission parameters and the second set of transmission parameters are different from the first quality of signal parameters and the second quality of signal parameters.

2. The method of claim 1, further comprising:

determining whether the second quality of signal parameter is worse than the predetermined quality of signal value; and

upon determining that the second quality of signal parameter is not worse than the predetermined quality of signal value, transmitting a third set of transmission parameters from the first optical network element to the second optical network element, wherein the third set of transmission parameters are different than the first set of transmission parameters and the second set of transmission parameters.

3. The method of claim 2, wherein upon determining that the second quality of signal parameter is worse than the predetermined quality of signal value, re-transmitting the second set of transmission parameters from the first optical network element to the second optical network element for subsequent signal transmissions over the optical communication channel.

4. The method of claim 1, wherein the first set of transmission parameters includes one or more of a baud rate value, a modulation type, and a forward error correction (FEC) overhead value;

and wherein the second set of transmission parameters includes at least one different baud rate value, modulation type, or FEC overhead value than the first set of transmission parameters.

5. The method of claim 1, wherein the predetermined quality of signal value is at least one of an optical signal-to-noise ratio (OSNR) value, a Q factor, a bit error rate (BER) value, or a generalized mutual information (GMI) value.

6. The method of claim 1, wherein the optical communication channel is associated with a fixed frequency;

and wherein the second set of transmission parameters for the optical communication channel are configured to minimize an amount of bandwidth used on the optical communication channel.

7. The method of claim 1, wherein the first set of transmission parameters are configured to provide a first bandwidth value for the optical communication channel;

and

wherein the second set of transmission parameters are configured to provide a second bandwidth value for the optical communication channel, wherein the second bandwidth value is larger than the first bandwidth value.

8. A non-transitory computer readable storage media encoded with instructions that, when executed by a processor, cause the processor to perform operations comprising:

receiving, at a first optical network element, a first signal transmission over an optical communication channel established between the first optical network element and a second optical network element, wherein the first signal transmission is transmitted according to a first set of transmission parameters;

determining a first quality of signal parameter associated with the first signal transmission;

determining whether the first quality of signal parameter is worse than a predetermined quality of signal value;

upon determining that the first quality of signal parameter is not worse than the predetermined quality of signal value, transmitting a second set of transmission parameters for the optical communication channel from the first optical network element to the second optical network element, wherein the second set of transmission parameters are different than the first set of transmission parameters;

receiving a second signal transmission over the optical communication channel from the second optical network element according to the second set of transmission parameters; and

determining a second quality of signal parameter associated with the second signal transmission, the first set of transmission parameters and the second set of transmission parameters are different from the first quality of signal parameters and the second quality of signal parameters.

9. The non-transitory computer readable storage media of claim 8, wherein the instructions further cause the processor to perform operations comprising:

determining whether the second quality of signal parameter is worse than the predetermined quality of signal value; and

upon determining that the second quality of signal parameter is not worse than the predetermined quality of signal value, transmitting a third set of transmission parameters from the first optical network element to the second optical network element, wherein the third set of transmission parameters are different than the first set of transmission parameters and the second set of transmission parameters.

10. The non-transitory computer readable storage media of claim 9, wherein the instructions further cause the processor to perform operations comprising:

upon determining that the second quality of signal parameter is worse than the predetermined quality of signal value, re-transmitting the second set of transmission parameters from the first optical network element to the second optical network element for subsequent signal transmissions over the optical communication channel.

11. The non-transitory computer readable storage media of claim 8, wherein the first set of transmission parameters includes one or more of a baud rate value, a modulation type, and a forward error correction (FEC) overhead value;

and wherein the second set of transmission parameters includes at least one different baud rate value, modulation type, or FEC overhead value than the first set of transmission parameters.

12. The non-transitory computer readable storage media of claim 8, wherein the predetermined quality of signal value is at least one of an optical signal-to-noise ratio (OSNR) value, a Q factor, a bit error rate (BER) value, or a generalized mutual information (GMI) value.

13. The non-transitory computer readable storage media of claim 8, wherein the optical communication channel is associated with a fixed frequency;

and wherein the second set of transmission parameters for the optical communication channel are configured to minimize an amount of bandwidth used on the optical communication channel.

14. The non-transitory computer readable storage media of claim 8, wherein the first set of transmission parameters are configured to provide a first bandwidth value for the optical communication channel;

and wherein the second set of transmission parameters are configured to provide a second bandwidth value for the optical communication channel, wherein the second bandwidth value is larger than the first bandwidth value.

15. An apparatus comprising:

an optical transceiver configured to transmit and receive signal transmissions over an optical communication channel established with at least one optical network element; and

at least one processor coupled with the optical transceiver, and configured to;

receive a first signal transmission over the optical communication channel from the at least one optical network element, wherein the first signal transmission is transmitted according to a first set of transmission parameters;

determine a first quality of signal parameter associated with the first signal transmission;

determine whether the first quality of signal parameter is worse than a predetermined quality of signal value;

upon determining that the first quality of signal parameter is not worse than the predetermined quality of signal value, transmit a second set of transmission parameters for the optical communication channel to the at least one optical network element, wherein the second set of transmission parameters are different than the first set of transmission parameters;

receive a second signal transmission over the optical communication channel from the at least one optical network element according to the second set of transmission parameters; and

determine a second quality of signal parameter associated with the second signal transmission, the first set of transmission parameters and the second set of transmission parameters are different from the first quality of signal parameters and the second quality of signal parameters.

16. The apparatus of claim 15, wherein the processor to further configured to:

determine whether the second quality of signal parameter is worse than the predetermined quality of signal value; and

upon determining that the second quality of signal parameter is not worse than the predetermined quality of signal value, transmit a third set of transmission parameters to the at least one optical network element, wherein the third set of transmission parameters are different than the first set of transmission parameters and the second set of transmission parameters.

17. The apparatus of claim 16, wherein the processor to further configured to:

upon determining that the second quality of signal parameter is worse than the predetermined quality of signal value, re-transmit the second set of transmission parameters to the at least one optical network element for subsequent signal transmissions over the optical communication channel.

18. The apparatus of claim 15, wherein the optical communication channel is associated with a fixed frequency;

and wherein the second set of transmission parameters for the optical communication channel are configured to minimize an amount of bandwidth used on the optical communication channel.

19. The apparatus of claim 15, wherein the first set of transmission parameters are configured to provide a first bandwidth value for the optical communication channel;

and

wherein the second set of transmission parameters are configured to provide a second bandwidth value for the optical communication channel, wherein the second bandwidth value is larger than the first bandwidth value.

20. The apparatus of claim 15, wherein the first set of transmission parameters includes one or more of a baud rate value, a modulation type, and a forward error correction (FEC) overhead value;

and wherein the predetermined quality of signal value is at least one of an optical signal-to-noise ratio (OSNR) value, a Q factor, a bit error rate (BER) value, or a generalized mutual information (GMI) value.