Method and apparatus for managing a frequency spectrum in a wavelength division multiplexing network

Patent metadata

Field	Value
Publication number	US-2018212704-A1
Application number	US-201715411490-A
Country	US
Kind code	A1
Filing date	Jan 20, 2017
Priority date	Jan 20, 2017
Publication date	Jul 26, 2018
Grant date	—

Abstract

A wavelength division multiplexing, WDM, network comprising an apparatus adapted to manage a frequency spectrum in the wavelength division multiplexing, WDM, network, the apparatus comprising an adjustment unit adapted to adjust a frequency offset between carriers for each individual carrier depending on performance characteristics of the individual carriers.

First claim

1 . A method for managing a frequency spectrum in a wavelength division multiplexing, WDM, network, the method comprising:
adjusting a frequency offset between individual carriers, for each individual carrier, depending on performance characteristics of the individual carriers; wherein a frequency offset between neighboring individual carriers is adjusted for each carrier individually depending on a performance characteristic of the individual carrier and on the performance characteristics of respective neighboring carriers.

2 . (canceled)

3 . The method according to claim 1 , wherein the performance characteristics comprise frequency-dependent characteristics including performance characteristics of components of a transmission line of an optical link and/or performance characteristics of transceivers on both sides of an optical link.

4 . The method according to claim 1 , wherein performance characteristics of individual carriers are predicted by a calculation unit during planning of the WDM network and/or monitored by a monitoring unit during a setup and/or operation of the WDM network and/or based on predictable performance variations across the WDM network.

5 . The method according to claim 4 , wherein performance characteristics of individual carriers are predicted or monitored by the monitoring unit continuously during operation of the WDM network and notified to a controller of the WDM network.

6 . The method according to claim 5 , wherein the controller of the WDM network controls an adjustment unit to adjust dynamically a frequency offset between carriers for individual carriers depending on the performance characteristics predicted or monitored during operation of the WDM network.

7 . The method according to claim 1 , wherein a passband is adjusted for each individual carrier depending on performance characteristics of individual carriers.

8 . The method according to claim 1 , wherein a frequency offset between carriers and/or passband frequency ranges of carriers are adjusted individually in incremental steps during a setup and/or during operation of the WDM network.

9 . The method according to claim 8 , wherein the frequency offset between carriers and/or the passband frequency ranges of carriers are adjusted until an excess signal to noise margin meets predetermined optimization criteria.

10 . The method according to claim 1 , wherein each carrier transports data through an optical link of the WDM network from a transmitter to a receiver.

11 . The method according to claim 10 , wherein performance characteristics of individual carriers are measured by the receiver and notified to a controller of the WDM network which controls an adjustment unit of the transmitter in response to the measured performance characteristics of the carriers to adjust a frequency offset between carriers and/or passband frequency ranges of individual carriers.

12 . The method according to claim 11 , wherein performance characteristics of individual carriers are measured by the receiver and directly notified to the transmitter comprising an adjustment unit which adjusts frequency offsets between carriers and/or passband frequency ranges of individual carriers in response to the measured performance characteristics.

13 . The method according to claim 12 , wherein performance characteristics of individual carriers measured by the receiver are notified directly to the transmitter via an in-band optical supervisory channel, OSC, an in-band data channel using OTN overhead and/or an out-of-band channel.

14 . The method according to claim 1 , wherein the individual carrier forms part of a superchannel consisting of multiple carriers.

15 . An apparatus adapted to manage a frequency spectrum in a wavelength division multiplexing, WDM, network, the apparatus comprising:
an adjustment unit adapted to adjust a frequency offset between individual carriers, for each individual carrier, depending on performance characteristics of the individual carriers; wherein a frequency offset between neighboring individual carriers is adjusted for each carrier individually depending on the performance characteristic of the individual carrier and on the performance characteristics of respective neighboring carriers.

16 . (canceled)

17 . The apparatus according to claim 15 , wherein the performance characteristics comprise frequency dependent characteristics including performance characteristics of an optical link and/or performance characteristics of transceivers on both sides of an optical link.

18 . The apparatus according to claim 15 , further comprising a monitoring unit adapted to monitor performance characteristics of individual carriers during operation of the WDM network.

19 . A wavelength division multiplexing, WDM, network comprising an apparatus adapted to manage a frequency spectrum in the wavelength division multiplexing, WDM, network, the apparatus comprising an adjustment unit adapted to adjust a frequency offset between individual carriers, for each individual carrier, depending on performance characteristics of the individual carriers;
wherein a frequency offset between neighboring individual carriers is adjusted for each carrier individually depending on the performance characteristic of the individual carrier and on the performance characteristics of respective neighboring carriers.

20 . The WDM network according to claim 19 , wherein the WDM network comprises:
a point-to-point network; and/or a ring network; and/or a mesh network.

Assignees

• Adva Optical Networking Se

Inventors

• Morkel Paul
• Tibuleac Sorin

Classifications

• H04J14/0227 Primary

  Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation · CPC title

• H04B10/27

  Arrangements for networking · CPC title

• H04J14/0224 Primary

  Irregular wavelength spacing, e.g. to accommodate interference to all wavelengths · CPC title

• H04J14/0284

  WDM mesh architectures · CPC title

• H04J14/0283

  WDM ring architectures · CPC title