NETWORK RESOURCE OPTIMIZATION BASED ON TIME-VARYING TRAFFIC IN OPTICAL NETWORKS

• US 20170180050A1
• Filed: 12/18/2015
• Published: 06/22/2017
• Est. Priority Date: 12/18/2015
• Status: Active Grant

• Current Assignee: Ciena Corporation
• Original Assignee: Ciena Corporation
• Inventors: LITTLEWOOD, Paul, BLANGER, Michel P., TREMBLAY, Christine, NOORUZZAMAN, Md., ALLOUNE, Nabih
• Granted Patent: US 10,623,126 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 10/27 Arrangements for networking
• CPC Class Codes: H04J 14/0227 Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation

Abstract

Systems and methods of network resource optimization based on time-varying traffic in an optical network with a filterless architecture include determining traffic variations based on the time-varying traffic in the optical network; and adjusting one or more of transceivers and wavelengths between nodes in the optical network based on the traffic variations and using the filterless architecture. The adjusting minimizes the number of the transceivers and the wavelengths based on the traffic variations and the time-varying traffic. The optical network can geographically span multiple time zones, contributing to the time-varying traffic.

Claims

1. A method of network resource optimization based on time-varying traffic in an optical network with a filterless architecture, the method comprising:

calculating traffic variations based on the time-varying traffic in the optical network over a period of time;

calculating a total number and a location of one or more of transceivers and wavelengths needed in the optical network for the period of time based on the traffic variations; and

adjusting the one or more of the transceivers and the wavelengths between nodes in the optical network based on the calculated total number and the location and using the filterless architecture for the adjusting the one or more of the transceivers and the wavelengths.

2. The method of claim 1, wherein the calculated total number comprises a minimum number of the transceivers and the wavelengths to support traffic based on the traffic variations of the time-varying traffic.

3. The method of claim 1, wherein the optical network geographically spans multiple time zones.

4. The method of claim 1, wherein the optical network is a submarine network with branching units comprising splitters and combiners for the filterless architecture.

5. The method of claim 1, wherein the method is performed one of a) offline for capacity planning in the optical network and b) online for capacity reassignment in the optical network.

6. The method of claim 1, wherein the filterless architecture comprises a broadcast-and-select node architecture, where one wavelength is broadcast to a plurality of nodes through splitters and combiners, and a coherent optical receiver which selectively receives a desired wavelength from a plurality of available wavelengths and rejects a plurality of undesired wavelengths without the need for a channel filter.

7. The method of claim 1, wherein the filterless architecture comprises passive optical components.

8. The method of claim 1, wherein the adjusting is performed over a period based on the traffic variations.

9. An apparatus adapted for network resource optimization based on time-varying traffic in an optical network with a filterless architecture, the apparatus comprising

circuitry adapted to calculate traffic variations based on the time-varying traffic in the optical network over a period of time;

circuitry adapted to calculate a total number and a location of one or more transceivers and wavelengths needed for the period of time based on the traffic variations; and

circuitry adapted to cause adjustment of the one or more of the transceivers and the wavelengths between nodes in the optical network based on the calculated total number and the location and using the filterless architecture in the adjustment of the one or more of the transceivers and the wavelengths.

10. The apparatus of claim 9, wherein the calculated total number comprises a minimum number of the transceivers and the wavelengths to support traffic based on the traffic variations of the time-varying traffic.

11. The apparatus of claim 9, wherein the optical network geographically spans multiple time zones.

12. The apparatus of claim 9, wherein the optical network is a submarine network with branching units comprising splitters and combiners for the filterless architecture.

13. The apparatus of claim 9, wherein the adjustment is performed one of a) offline for capacity planning in the optical network and b) online for capacity reassignment in the optical network.

14. The apparatus of claim 9, wherein the filterless architecture comprises a broadcast-and-select node architecture, where one wavelength is broadcast to a plurality of nodes through splitters and combiners, and a coherent optical receiver which selectively receives a desired wavelength from a plurality of available wavelengths and rejects a plurality of undesired wavelengths without the need for a channel filter.

15. The apparatus of claim 9, wherein the filterless architecture comprises passive optical components.

16. The apparatus of claim 9, wherein the adjustment is performed over a period based on the traffic variations.

17. A system for network resource optimization based on time-varying traffic in an optical network with a filterless architecture, the system comprising:

a processor; and

memory storing instructions that, when executed, cause the processor to

calculate traffic variations based on the time-varying traffic in the optical network over a period of time,

calculate a total number and a location of one or more of transceivers and wavelengths needed in the optical network for the period of time based on the traffic variations, and

cause adjustment of the one or more of the transceivers and the wavelengths between nodes in the optical network based on the calculated total number and the location and using the filterless architecture for the adjustment of the one or more of the transceivers and the wavelengths.

18. The system of claim 17, wherein the calculated total number comprises a minimum number of the transceivers and the wavelengths to support traffic based on the traffic variations of the time-varying traffic.

19. The system of claim 17, wherein the optical network geographically spans multiple time zones.

20. The system of claim 17, wherein the optical network is a submarine network with branching units comprising splitters and combiners for the filterless architecture.