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Path calculation method and node equipment

A node device and path calculation technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve the problems that single-step multiplexing capabilities cannot be shared, multi-step multiplexing information is not specified, and is not applicable

Inactive Publication Date: 2013-10-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the route publishing method and path calculation method in the prior art are only suitable for the situation that the multi-step multiplexing capability is implemented on one circuit board and the single-step multiplexing capability cannot be shared, while the multi-step multiplexing capability is implemented by different circuit boards. implementation, or the single-step multiplexing capability can be shared, there is no provision in the prior art for how to publish the multi-step multiplexing information, and the above-mentioned route publishing method and path calculation method are not applicable

Method used

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  • Path calculation method and node equipment

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Such as figure 2 As shown, searching the configuration information of each circuit board shows that the high-order signal of the multiplexing module 211 cannot be multiplexed to a higher-order signal as the low-order signal of other multiplexing modules of node device A, and node device A is the The multiplexing module 211 assigns a port number 1. As shown in Table 1, the node device A can publish the routing information of the multiplexing module 211 according to the existing routing publishing manner.

[0094] Table 1: Routing information published by node device A

[0095]

[0096] Such as image 3 As shown, searching the configuration information of each circuit board shows that the high-order signals of the multiplexing modules 311, 321 and 331 cannot be multiplexed into higher-order signals as the low-order signals of other multiplexing modules of the node device B, and the node device B A port number 1-3 is assigned to the multiplexing module 311, the mult...

Embodiment 2

[0142] The difference between Embodiment 2 and Embodiment 1 is that node device B only allocates a port number 4 to the multiplexing module 341, and node device D only allocates a port number 4 to the multiplexing module 522, and publishes the two multiplexing modules. The following routing information of the module, that is, the node device number, port number, low-order signal type, high-order signal type, bandwidth resource, low-order reachable port number, high-order reachable port number, low-order reachable port list, List of high-order reachable ports. For example, a sub-TLV shown in Table 9 is newly defined to carry the above routing information of the multiplexing modules 341 and 522 .

[0143] Table 9

[0144]

[0145]

[0146] The multiplexing module 341 has no connectivity constraints, therefore, the node device B may not publish the connectivity information of the multiplexing module 341, that is, the number of low-order reachable ports, the number of high-...

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Abstract

The embodiment of the invention provides a path calculation method and node equipment. The path calculation method comprises the following steps of: reading the configuration information of a circuit board where a multiplexing module is, distributing a port number for the multiplexing module, and according to the configuration information, issuing the following routing information of the multiplexing module: the node equipment number, the port number, the low order signal type, the high order signal type, the band width resource and the connectivity information; calculating the required path according to the routing information; if the path supporting the lowest order signal type can not be calculated, firstly, calculating a first subpath supporting the lowest order signal type and a second subpath supporting a high order signal type; and searching the multiplexing module connected with the first subpath and the second subpath from the node equipment where the two end points of the second subpath belong, wherein the multiplexing module supports multiplexing and demultiplexing between the lowest order signal and the high order signal. The path calculation method is suitable for the conditions that the multistep multiplexing ability is realized by one circuit board and by different circuit boards.

Description

technical field [0001] The present invention relates to the field of route publication and path calculation, in particular to a path calculation method and node equipment for executing the method. Background technique [0002] The transmission network is composed of node devices and links. The circuit boards of the same node device realize the cross-connection of signals through the cross-connect matrix on the cross-connect board, and the circuit boards between different node devices are connected by physical links such as optical fibers and wavelengths. Node devices can be composed of time division multiplexing (TDM) devices. In a TDM network, low-rate signals (hereinafter referred to as “low-order signals”) need to be multiplexed into high-rate signals (hereinafter referred to as “signals”) according to certain rules. "higher-order signal"), and transmit the higher-order signal to the remote node device. [0003] For example, in an optical transport network (optical trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/701
Inventor 资小兵
Owner HUAWEI TECH CO LTD