Method, System And Apparatus For Distributing Node Information

• US 20090087184A1
• Filed: 09/30/2008
• Published: 04/02/2009
• Est. Priority Date: 09/30/2007
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Li, Dan, Han, Jianrui, Gao, Jianhua
• Granted Patent: US 8,095,009 B2
• Time in Patent Office: Days
• US Class Current: 398/79
• CPC Class Codes: H04J 14/0227 Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
• CPC Class Codes: H04J 14/0246 using one wavelength per ONU
• CPC Class Codes: H04J 14/025 using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
• CPC Class Codes: H04J 14/0279 WDM point-to-point architectures
• CPC Class Codes: H04Q 11/0062 Network aspects
• CPC Class Codes: H04Q 2011/0079 Operation or maintenance aspects
• CPC Class Codes: H04Q 2011/0086 Network resource allocation, dimensioning or optimisation

Abstract

A method for distributing node information, including an optical node generating an information bit stream based on its own node information and distributing the information bit stream it generates and a wavelength sequence corresponding to the node information. According to various embodiments, an information bit stream is generated based on the node information of an optical node so as to reduce the volume of data in the node information distributed by an optical node.

Claims

1. A method for distributing node information, comprising the following:

generating, by an optical node, an information bit stream based on its own node information; and

distributing, by the optical node, the generated information bit stream and a wavelength sequence corresponding to the node information.

2. The method for distributing node information of claim 1, wherein distributing the generated information bit stream and the wavelength sequence corresponding to the node information by the optical node further comprises distributing the generated information bit stream and the wavelength sequence corresponding to the node information together or separately.

3. The method for distributing node information of claim 1, further comprising:

if the wavelength sequence corresponding to the node information has been distributed, during the distribution of the generated information bit stream, the wavelength sequence is not distributed again.

4. The method for distributing node information of claim 1, wherein the node information further comprises potential wavelength connectivity information between two traffic engineering, TE, links on the optical node, and a potential wavelength connectivity information bit stream is generated based on the potential wavelength connectivity information.

5. The method for distributing node information of claim 4, wherein the generating and the distributing the potential wavelength connectivity information bit stream are performed when a device of the optical node is initialized or changed, or the capability of a device of the optical node is changed.

6. The method for distributing node information of claim 1, wherein the node information comprises wavelength occupancy status information of TE links on the optical node, and a wavelength occupancy status information bit stream is generated based on the wavelength occupancy status information.

7. The method for distributing node information of claim 6, wherein the generating and the distributing the wavelength occupancy status information bit stream are performed by the optical node periodically and/or in real time.

8. The method for distributing node information of claim 1, wherein the distributing the generated information bit stream further comprises flooding the generated information bit stream by the optical node via an extended Interior Gateway Protocol, IGP, to other optical nodes or centralized path computation units.

9. The method for distributing node information of claim 1, wherein before distributing the generated information bit stream by the optical node further comprises compressing the generated information bit stream by the optical node.

10. An optical node, comprising a bit stream generation module and a distribution module, wherein

the bit stream generation module is configured to generate an information bit stream based on the node information of the optical node itself;

and

the distribution module is configured to distribute the generated information bit stream and a wavelength sequence corresponding to the node information.

11. The optical node of claim 10, wherein the bit stream generation module further comprises a potential wavelength connectivity information generation sub-module and/or a wavelength occupancy status information generation sub-module, wherein

the potential wavelength connectivity information generation sub-module is configured to generate a potential wavelength connectivity information bit stream based on a potential wavelength connectivity information between two traffic engineering, TE, links on the optical node;

and

the wavelength occupancy status information generation sub-module is configured to generate a wavelength occupancy status information bit stream based on a wavelength occupancy status information of the TE links on the optical node.

12. The optical node of claim 10, further comprising a compression module, configured to compress the information bit stream generated by the bit stream generation module.

13. A system for distributing node information, comprising:

a first optical node, configured to generate an information bit stream based on its own node information, and distribute the generated information bit stream and a wavelength sequence corresponding to the node information; and

a second optical node or a centralized path computation unit, configured to obtain the node information of the first node based on the received bit stream and wavelength sequence.

14. The system for distributing node information of claim 13, wherein the first optical node further comprises a bit stream generation module and a distribution module, wherein:

the bit stream generation module is configured to generate an information bit stream based on the node information of the optical node itself; and

the distribution module is configured to distribute the generated information bit stream and the wavelength sequence corresponding to the node information.

15. The system for distributing node information of claim 14, wherein the bit stream generation module further comprises a potential wavelength connectivity information generation sub-module and/or a wavelength occupancy status information generation sub-module, wherein:

the potential wavelength connectivity information generation sub-module is configured to generate a potential wavelength connectivity information bit stream based on the potential wavelength connectivity information between two TE links on the first optical node; and

/or

the wavelength occupancy status information generation sub-module is configured to generate a wavelength occupancy status information bit stream based on the wavelength occupancy status information of the TE links on the first optical node.

16. The system for distributing node information of claim 14, further comprising a compression module configured to compress the information bit stream generated by the bit stream generation module.

17. The system for distributing node information of claim 13, wherein the second optical node or the centralized path computation unit further comprises a receiving module and a analysis module, wherein:

the receiving module is configured to receive the bit stream and the wavelength sequence distributed by the first optical node; and

the analysis module is configured to analyze the bit stream and the wavelength sequence received by the receiving module and obtain the node information of the first optical node;

if the received bit stream distributed by the first optical node has been compressed, the second optical node or the centralized path computation unit further comprises a decompression module configured to decompress the received bit stream and transmit the decompressed bit stream to the analysis module.

18. A computer readable medium comprising code for generating an information bit stream by an optical node based on its own node information, and distributing the generated information bit stream and a wavelength sequence corresponding to the node information by the optical node.