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Hierarchical routing query method of automatic exchange optical network

A technology of automatic switching and query methods, applied in the field of optical networks, can solve the problems of difficulty in owning ASON network routing information, model methods cannot meet routing query and calculation requirements, and achieve the effect of speeding up

Inactive Publication Date: 2008-06-11
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, it is generally difficult for the RDB of a node to have complete routing information of the entire ASON network, especially when the ASON network contains multiple routing domains, and the RDB of a node often only has information about the local routing domain
like figure 2 As shown in , when a connection needs to be established between point A in routing domain 1 and point K in routing domain 4, as shown by the dotted line, then figure 1 The model method shown cannot satisfy the routing lookup and computation requirements for this connection

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  • Hierarchical routing query method of automatic exchange optical network
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  • Hierarchical routing query method of automatic exchange optical network

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no. 1 example

[0028] The interlayer routing query method of the present embodiment includes the following steps:

[0029] Step 1. After the routing controller RC of the sub-domain receives the routing query request, it proceeds to the next step;

[0030] Step 2. The RC invokes the routing algorithm according to the request, and completes the routing calculation based on the RDB of the node. If the complete routing is obtained through calculation, it returns the routing to the requesting party (such as CC), and ends; if the complete routing is not obtained, the calculation is completed. In the case of failure or only part of the route is calculated, the route query request is forwarded to the parent domain RC, and the calculated part of the route is carried at the same time;

[0031] Step 3. The parent domain RC calls the routing algorithm according to the request, and completes the routing calculation based on the RDB of the node. If the complete route is obtained, the RC that initiates the...

no. 1 example approach

[0044] Based on the method of the first embodiment, relevant steps etc. are partially modified to form the hierarchical routing query method of the second embodiment of the present invention, including the following steps:

[0045] Step 1. After receiving the routing query request, the routing controller RC of the sub-domain proceeds to the next step;

[0046] Step 2. The RC invokes the routing algorithm according to the request, and completes the route calculation based on the RDB of the node. If the complete route is calculated, it returns the route to the requesting party, and ends; if the complete route is not obtained, it includes calculation failure or only calculation In the case of a partial route, forward the route query request to the parent domain RC, and carry the calculated partial route at the same time;

[0047] Step 3. The parent domain RC calls the routing algorithm according to the request, and completes the route calculation based on the RDB of the node. If ...

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Abstract

The invention discloses a hierarchical routing query method of an automatic switched optical network. After a RC of a subdomain network element receives a query request, the RC of the subdomain network element finishes the routing calculation, if the complete routing fails to be obtained, the RC of the subdomain network element transfers the request to a parent domain RC and the calculated partial routing is carried; the parent domain RC finishes the routing calculation based on the node RDB, if the complete routing fails to be obtained, the parent domain RC transfers or broadcasts the request to a certain other subdomain RC one by one and the routing among the subdomains and the routing of the subdomain initiating the request are saved; the subdomain RC finishes the routing calculation and returns the routing query result to the parent domain RC; if the parent domain RC can obtain or combinedly obtain the complete routing, the parent domain RC returns the routing to the request party; if the parent domain RC still does not obtain the complete routing after the return results of all the subdomains are received, the parent domain RC returns the routing query failure information to the request party. The invention can solve the problem of establishing the routing query of cross-domain connection, and has the advantage of quick query.

Description

technical field [0001] The invention relates to the field of optical networks, in particular to a routing query method for automatic switching optical networks. Background technique [0002] Optical network, such as OTN (Optical transmission network, optical transport network), WDM (Wavelength-division multiplexing, wavelength division multiplexing), SDH (Synchronous digital hierarchy, synchronous digital series) or SONET (Synchronous optical network, synchronous optical network) transmission network , has been widely used in the field of telecommunications. [0003] Automatic switched optical network (ASON for short) is a research hotspot in the field of optical network in recent years. The ITU-T G.8080 proposal puts forward the concept of ASON, and completes the functions of the ASON network by setting a special control plane (Control plane, CP for short). The ITU-T G.7713 proposal stipulates the implementation framework of distributed calls and connections in the ASON n...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04Q11/00H04L12/721
Inventor 孙德胜
Owner ZTE CORP