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Notifying type dynamic path protection for optical network

A network state and network technology, applied in the direction of data exchange network, optical multiplexing system, multiplexing communication, etc., can solve the problem of waste of precious resources and achieve the effect of efficient and effective distribution

Inactive Publication Date: 2003-04-23
WSOU INVESTMENTS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In a ring structure, the protection fiber is hardly used for transmission - a waste of precious resources

Method used

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  • Notifying type dynamic path protection for optical network
  • Notifying type dynamic path protection for optical network
  • Notifying type dynamic path protection for optical network

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Experimental program
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Embodiment Construction

[0018] The present invention may be better understood with reference to the accompanying drawings 1-6, wherein like reference numerals are used to indicate like elements of the different drawings.

[0019] A more complete understanding of the invention and its advantages can now be obtained by reference to the following description taken in conjunction with the accompanying drawings, in which:

[0020] FIG. 1 shows a block diagram of a general optical network 10 . The network comprises a plurality of nodes 12 connected by fiber optic links 14 . Link 14 is an optical fiber that transmits data between two nodes; for example, between node A and node B. Fiber can transmit information over n wavelengths or n channels. The link 14 is unidirectional, so there are typically two links between connected pairs of nodes, with each node receiving information on one link and sending information on the other link. For simplicity of description, only one link is shown in FIG. 1 , but it sh...

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Abstract

Protection paths are dynamically allocated in a wavelength-division multiplexed network including a plurality of nodes (12) coupled by communication links (14). A database (26) stores information regarding the status of the network including information associating channels in each link of the node to one or more protection paths and information associating channels in each link to respective working paths. Upon receiving a request for a new protection path to protect a defined working path, links are identified that have at least one shareable channel which may be shared between the new protection path and one or more existing protection paths, as are links that do not have a shareable channel but do have an unused channel that may be used for the new protection path. Costs are assigned to identified links where links that have at least one shareable channel are weighted differently that links that do not have a shareable channel. A protection path is determined using the found links based on the costs.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from the filing date of Eile-Dit-Cosaque et al. pending provisional application U.S. 60 / 328,087, entitled "Notification-Type Dynamic Path Protection for Optical Networks," filed October 10, 2001. technical field [0003] The present invention relates generally to wavelength division multiplexing networks (WDM), and more particularly to methods and apparatus for providing shared path protection in wavelength division multiplexing networks. Background technique [0004] The ever-increasing demand for communication bandwidth is driving the shift to optical networks. Using wavelength-division multiplexing to transmit multiple independent communication channels over a single fiber can significantly increase the bandwidth of single-wavelength networks. However, managing such huge bandwidth is a challenge. [0005] In the past, connections between nodes were done manually. Now, Multi-Protoc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/02H04L12/56
CPCH04J14/0241H04J14/0287H04J14/0284H04L47/10H04J14/0295H04L45/00H04J14/0227H04L45/22H04L45/247
Inventor 戴维·E-D-科萨克马尔·阿里
Owner WSOU INVESTMENTS LLC