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Route selection method for OTN (optical transport network)

A technology of optical transport network and routing, which is applied in the direction of multiplexing system selection device, selection device, optical multiplexing system, etc., can solve the problem that the best path cannot be selected for forwarding data packets, and achieve cost reduction, The effect of improving communication quality

Inactive Publication Date: 2018-02-09
STATE GRID ZHEJIANG ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a routing selection method for an optical transport network OTN, which is used to solve the problem in the prior art that the best path cannot be selected for forwarding data packets according to the forwarding path in the routing table

Method used

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  • Route selection method for OTN (optical transport network)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] combined with figure 1 As shown, a routing method for an optical transport network OTN includes:

[0049] Step S100: Determine the conditions of the optical network element forwarding path in the optical transport network OTN;

[0050] Step S200: determining the source node and the destination node;

[0051] Step S300: Find out each feasible path from the source node to the destination node according to the node routing model;

[0052] Step S400: Calculate the cost of each feasible path, and select the best path;

[0053] Step S500: Write routing table.

[0054] working principle:

[0055] Formulate the conditions for the optical network elements of the optical transport network OTN to forward data packets. The optical network elements here refer to nodes with forwarding functions such as routers. When an optical network element receives a data packet, it acts as a source node and forwards data packets to Send the data packet, and the address of the destination nod...

Embodiment 2

[0057] On the basis of Example 1, in conjunction with the attached figure 1 As shown, step S600 is also included: modifying the routing table.

[0058] working principle:

[0059] Due to the addition or deletion of optical network elements on the optical transport network OTN, as well as changes in the communication quality of transmission nodes or transmission links, it is necessary to modify the routing table according to the actual situation of the network in practice, that is, to check the routing selection Whether the feasible path in the table changes, and whether the visited nodes in the feasible path and the cost of the available light path change, and change the optimal path according to these changes to the path selection order table, and write the changes into the routing table complete Routing table revisions.

[0060] Further, the step S600 specifically includes:

[0061] Step S610: receiving link state broadcasts from neighboring routers;

[0062] Step S620: ...

Embodiment 3

[0068] On the basis of embodiment 2, in conjunction with the attached figure 1 As shown, the step S300 specifically includes:

[0069] Step S310: Establish a matrix of (M×K) rows (N×K), where M is the number of optical fiber output ports, K is the maximum number of wavelengths of optical ports, and N is the number of optical fiber input ports;

[0070] Step S320: Find and delete elements in the matrix that do not meet the conditions of the optical network element forwarding path;

[0071] Step S330: The remaining number of elements in the matrix is ​​the number of feasible paths;

[0072] Step S340: Number the feasible paths.

[0073] working principle:

[0074] There are N optical fiber input ports and M optical fiber input ports in the optical transport network OTN. In the optical transport network using dense wavelength division multiplexing technology, K is the number of wavelengths. Therefore, the establishment of (M×K) lines, (N× K) matrix, which can list all the pat...

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Abstract

The invention discloses a route selection method for an OTN (optical transport network), and the method comprises the steps: S100, determining the conditions of an optical network element transfer path in the OTN; S200, determining a source node and a target node; S300, searching each feasible path from the source node to the target node according to a node route model; S400, calculating the costof each feasible path, and selecting the optimal path; S500, writing the optimal path into the route selection table. According to the invention, the visited nodes and the feasible optical paths are sequentially numbered, an all visited nodes and feasible optical paths between the source node and the target node are connected sequentially, thereby forming a feasible path. Moreover, through the calculation of the cost of each feasible path, the method determines the optimal path and a path selection sequence table, so a data package can be transferred through the optimal path during the transferring. When the optimal path has a fault, the data package can be transferred according to the sequence of the path selection sequence table, thereby reducing the communication cost of the OTN, and improves the communication quality.

Description

technical field [0001] The invention relates to the technical field of routing and forwarding, in particular to a routing selection method for an optical transport network (OTN). Background technique [0002] Electrical communication is communication realized by using electricity as an information carrier, while optical communication is communication realized by using light as an information carrier. The so-called optical fiber communication is to use optical fiber to transmit light waves carrying information to achieve the purpose of communication. To make the light wave a carrier of information, it must be modulated, and then the information is detected from the light wave at the receiving end. Due to the advantages of optical fiber communication: transmission frequency band, large communication capacity; small attenuation, long transmission distance; small crosstalk, high signal transmission quality, and the maturity of optical fiber communication technology, optical fib...

Claims

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Application Information

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IPC IPC(8): H04J14/02H04L12/721H04Q11/00H04L12/703H04L45/28
CPCH04J14/0227H04L45/123H04L45/28H04Q11/0005H04Q11/0067H04Q2011/0073
Inventor 张彩友杨鸿珍邵炜平吴慧杨威程路明谢谭谈吴建伟彭瑶
Owner STATE GRID ZHEJIANG ELECTRIC POWER
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