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Distributed intelligence wavelength division multiplexed network

Patent 6163392 Issued on December 19, 2000. Estimated Expiration Date: Icon_subject May 23, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

System for allocating messages between virtual channels to avoid deadlock and to optimize the amount of message traffic on each type of virtual channel
Patent #: 5583990
Issued on: 12/10/1996
Inventor: Birrittella, et al.

Communication method in network system for performing information transmission among terminal equipments using light beams of a plurality of wavelengths, terminal equipment used in the method and network system using the method
Patent #: 5699177
Issued on: 12/16/1997
Inventor: Yamamoto

Optical communication system with improved maintenance capabilities
Patent #: 5815295
Issued on: 09/29/1998
Inventor: Darcie, et al.

Network system having node devices connected therebetween, node device used in the network system, and communication method utilized in the network system
Patent #: 5930014
Issued on: 07/27/1999
Inventor: Yamamoto

Span management system for wavelength division multiplexed network Patent #: 5978115
Issued on: 11/02/1999
Inventor: Condict, et al.

Inventors

Assignee

Application

No. 862864 filed on 05/23/1997

US Classes:

398/1FAULT RECOVERY

Examiners

Primary: Pascal, Leslie
Assistant: Sedighian, M. R.

Attorney, Agent or Firm

Foreign Patent References

  • 9705725 WO. 02/13/1997

International Classes

H04J 014/02
H04B 010/20
H04B 010/02

Abstract

The present invention is directed toward a distributed intelligence fiber-optic communication network in which node control processors (NCPs) associated with each network element periodically transmit identification and status information to the other NCPs in the network. Various faults in the network can thus be readily identified, and appropriate tasks for modifying the network in response to the fault (such as rerouting around a defective network element) can be carried out. Further, information continues to be distributed among the NCPs even if a break occurs in a segment of fiber in the network.

Other References

  • Tada, Y., et al., "OA&M Framework for Multiwavelength Photonic Transport Networks", IEEE Journal on Selected Areas in Communications, vol. 14, No. 5, Jun. 1996, pp. 914-921
  • Bischoff, M. et al., "Operation and Maintenance for An All-Optical Transport Network", IEEE Communications Magazine, vol. 34, No. 11, Nov. 1996, pp. 136-142
  • Ramaswami, R., et al., "Distributed Network Control for Wavelength Routed Optical Networks", Proceedings of IEE Infocom 1996. Conference on Computer Communications, Fifteenth Annual Joint Conference of the IEEE Computer and Communications Societies. Networking the Next Generation San Francisco, vol. 1, No. CONF. 15, Mar. 1996, pp. 138-147, Institute of Electrical and Electronics Engineers, right-hand column, lines 16-18, p. 13
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