WO2011147174A1

WO2011147174A1 - Transfer method and system for connection management in automatic switching optical network

Info

Publication number: WO2011147174A1
Application number: PCT/CN2010/079572
Authority: WO
Inventors: 梁树国
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-05-25
Filing date: 2010-12-08
Publication date: 2011-12-01
Also published as: CN101854257B; CN101854257A

Abstract

A transfer method for the connection management in an Automatic Switching Optical Network (ASON) is provided in the present invention. The method includes: based on the final transfer result reported by the initial node of the ASON, the network management layer determines to perform the transfer for the Soft Permanent Connection (SPC) information when the final transfer result is that the transfers of the SPC information of all the ASON nodes are successful. A transfer system for the connection management in an ASON is also provided in the present invention. The system includes a network element of the network management layer. Said network element of the network management layer includes a SPC transfer decision processing module. A network element of the network management layer in an ASON is further provided in the present invention. The technical solutions of the present invention can avoid multiple transfers and the middle transfers under the situation that the transfers are unsuccessful, thus the transfer efficiency is improved, and the burden of the network management layer is reduced.

Description

Migration method and system for connection management in automatic switched optical network

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a method and system for migrating connection management in an automatic switched optical network.

A traditional optical network is configured by a network management layer, and the network management layer completes the configuration of the network, and only stores permanent connection (PC) information, and the permanent connection information is in the network management layer and the network element. The agent layer is saved. As shown in FIG. 1 , a conventional optical network is mainly composed of a network management layer, a network element proxy layer, and a transport plane, where the transport plane is a plane formed by a fiber-optic connection. Automatic Switched Optical Network (ASON) is an intelligent optical network that can realize automatic switching. It has been developed and applied in a certain way, and has a tendency to gradually expand its application range. Currently, in the ASON network, there are both traditional permanent connection information and a new Soft Permanent Connection (SPC) information for the ASON network. For network maintenance and other reasons, connection management migration is required, and then the traditional exchange information (ie, permanent connection information) configured by the network management layer is converted into ASON automatically managed exchange information (ie, soft permanent connection information), and Reverse the need to convert the exchange information automatically managed by ASON into the exchange information configured by the network management layer. FIG. 2 is a schematic diagram showing the composition of an optical network after adding an ASON. The network is mainly composed of: a network management layer, a network element proxy layer, a transport plane, and an ASON control plane. Referring to FIG. 2, the network has the following characteristics: The permanent connection information is point-to-point, and each network element agent layer has persistent connection information and needs to be consistent with the permanent connection information saved by the network management layer; the soft permanent connection information is End-to-end, the network element proxy layer does not save the soft permanent connection information, Information is only stored on the ASON control plane and network management. The migration of connection management in an automatic switched optical network involves the network management layer, the network element proxy layer, and

ASON controls the migration collaboration between the three planes. In the prior patent documents, Chinese Patent Application No. 200810098298.9 discloses "a state transition based migration method in an automatic switched optical network", but the application only describes how each ASON node performs PC based on state transition from the perspective of ASON. SPC's mutual migration. The migration management method of the connection management in other existing ASON optical networks has the following problems: For the migration of the soft permanent connection information during the connection management migration process, if the migration of the connection management involves multiple network elements, each network element has A migration of the soft and permanent connection information is required. It needs to be migrated multiple times. If there is a migration failure, the previous migration has already been migrated and needs to be restored to the original configuration.

SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a migration method and system for connection management in an automatic switched optical network, which improves the efficiency of the network management layer while ensuring compatibility with existing networks. To solve the above technical problem, the present invention provides a method for migrating connection management in an automatic switched optical network, the method comprising: the network management layer according to a final migration result of >3⁄4 on the first node of the Automatically Switched Optical Network (ASON), The result of the final migration is that when the soft permanent connection (SPC) information of all ASON nodes is successfully migrated, the decision is made to migrate the soft permanent connection information. The method further includes: the network management layer notifying the ASON head node to perform connection management migration by using the network element proxy layer;

The ASON head node sends a connection management migration request to each of the associated ASON nodes; each of the associated ASON nodes performs a corresponding migration operation, and notifies the network element proxy layer of the intermediate migration result, and the network element agent layer reports to the network management layer. Intermediate migration result information;

The ASON head node passes the final migration result to the network management layer through the network element proxy layer. The network management layer determines whether to perform the migration of the soft permanent connection information according to the final migration result. The method further includes:

If the intermediate migration result is successful, the network agent layer reports the intermediate migration result information to the network management layer after adding or deleting the corresponding permanent connection information, and the network management layer also adds or deletes the corresponding permanent connection information;

If the result of the intermediate migration is a failure, the network agent layer does not modify the permanent connection information, directly reports the intermediate migration result information to the network management layer, and the network management layer does not modify the permanent connection information. When the network management layer determines the migration of the soft permanent connection information, the method further includes: the network management layer adds or deletes the corresponding soft permanent connection information; the method further includes: the network management layer determines not to perform the soft permanent connection information migration At the time, the network management layer will not modify the soft permanent connection information. When the network element proxy layer adds the persistent connection information, only the added permanent connection information is saved in the database, and is not sent to the transmission plane; when the network element proxy layer deletes the permanent connection information, only the corresponding one in the database is deleted. The permanent connection information is deleted and is not sent to the transmission plane. To solve the above technical problem, the present invention further provides a migration management system for connection management in an automatic switched optical network, where the system includes a network management layer network element, and the network management layer network element includes a soft permanent connection (SPC) migration decision. The processing module, wherein: the SPC migration decision processing module is configured to: according to the final migration result reported by the ASON first node, when the final migration result is that the SPC connection information of all the ASON nodes is successfully migrated, the soft permanent connection information is decided to be migrated. . The system further includes a network element proxy layer network element, where the network management layer network element further includes a permanent connection (PC) migration processing module, and the network element proxy layer network element is set to: receive the relevant ASON for performing connection management migration After the intermediate migration result is notified by the node, the intermediate migration result information is reported to the network management layer network element; The PC migration processing module is configured to: perform permanent connection information migration according to the intermediate migration result information reported by the network element proxy layer network element. The network element proxy layer network element is configured to report the intermediate migration result information to the network management layer network element as follows: if the intermediate migration result is successful, after adding or deleting the corresponding permanent connection information, to the network The management network element reports the intermediate migration result information. If the intermediate migration result is a failure, the network element proxy layer network element does not modify the permanent connection information, and directly reports the intermediate migration result information to the network management network element. The PC migration processing module is configured to perform the migration of the persistent connection information according to the intermediate migration result information reported by the network element proxy layer in the following manner: according to the intermediate migration result reported by the network element proxy layer network element, If the intermediate migration result is successful, the corresponding permanent connection information is added or deleted; if the intermediate migration result is a failure, the permanent connection information is not modified. The SPC migration decision processing module is further configured to: when the decision is made to migrate the soft permanent connection information, the corresponding soft permanent connection information is added or deleted; when the decision is not to perform the soft permanent connection information migration, the soft permanent connection information is not performed. Modifications. The network element proxy layer network element is further configured to: when adding the permanent connection information, only the added permanent connection information is saved in the database, and is not sent to the transmission plane; and when the permanent connection information is deleted, only the corresponding in the database is The permanent connection information is deleted and is not sent to the transmission plane. To solve the above technical problem, the present invention further provides a network management network element in an automatic switched optical network, where the network management layer network element includes a soft permanent connection (SPC) migration decision processing module, where: the SPC migration The decision processing module is configured to: according to the final migration result reported by the first node of the ASON, when the final migration result is that the SPC connection information of all the ASON nodes is successfully migrated, the soft permanent connection information is decided to be migrated. The network management layer network element further includes a permanent connection (PC) migration processing module, where the PC migration processing module is configured to: after receiving the intermediate migration result notified by the relevant network node agent performing the connection management migration, And performing migration of the permanent connection information according to the intermediate migration result information reported by the network element proxy layer. The PC migration processing module is configured to perform the migration of the persistent connection information according to the intermediate migration result information reported by the network element proxy layer according to the following: according to the intermediate migration result reported by the network element proxy layer, if the intermediate migration If the result is successful, the corresponding permanent connection information is added or deleted; if the intermediate migration result is a failure, the modification of the permanent connection information is not performed. The SPC migration decision processing module is further configured to: when the decision is made to migrate the soft permanent connection information, the corresponding soft permanent connection information is added or deleted; when the decision is not to perform the soft permanent connection information migration, the soft permanent connection information is not performed. Modifications.

Compared with the prior art, the present invention has the following advantages: After the soft permanent connection information is successfully migrated, the ASON head node notifies the network management layer that the migration is successful, and the network management layer performs the soft permanent connection information migration according to the final migration result, thereby avoiding Multiple migrations and intermediate migrations in the case of migration failures improve migration efficiency and reduce the burden on the network management layer. After the permanent connection information is successfully migrated, the network element agent layer saves the storage and reports it to the network management layer. The information of the network element proxy layer and the network management layer is consistent, so that the method is the same as that of the traditional network management layer. In addition, in the solution of the present invention, the network element agent layer adds permanent connection information, but only after constructing related data. The inbound storage is not sent to the transport plane. Similarly, the NE proxy layer deletes the persistent connection information, but deletes the corresponding connection information in the database and does not send it to the transport plane. Therefore, whether the migration is successful or not , will not affect the existing transmission business.

1 is a schematic diagram of a conventional optical network; FIG. 2 is a schematic diagram of an optical network after adding an ASON; FIG. 3 is a schematic diagram of a flow of a PC being migrated to an SPC according to an embodiment of the present invention; Schematic diagram of the process of migrating to a PC. BEST MODE FOR CARRYING OUT THE INVENTION The main object of the present invention is to provide a method for realizing mutual migration between a PC and an SPC, the core idea of which is: the migration of soft permanent connection information is no longer each network element (ie, each ASON node) The network management layer performs the migration of the soft permanent connection information according to the final migration result. After the soft permanent connection information is successfully migrated, the ASON head node notifies the network management layer that the migration is successful, and the network management layer according to the entire SPC. The notification of the successful migration of the connection information, the migration of the soft permanent connection information. The invention performs the migration of the soft permanent connection information according to the final migration result reported by the first node of the ASON, and only needs to perform the migration of the soft permanent connection information; and if the migration fails, the recovery is not required, because there is no migration process. Change the configuration.

Based on the above idea, the migration method of the connection management in the automatic switched optical network provided by the present invention specifically uses the following technical solution: The network management layer is based on the final migration result of >3⁄4 on the ASON head node, and the final migration result is all When the SPC connection information of the ASON node is successfully migrated, the decision is made to migrate the soft permanent connection information. The network management layer determines whether to perform the soft permanent connection information migration according to the final migration result, if the final migration result is successful, the network management layer needs to add or delete the corresponding soft permanent connection information; If it is a failure, the network management layer will not modify the soft permanent connection information. Further, the migration method of the connection management of the present invention may specifically include the following steps: Step A. The network management layer notifies the ASON head node to perform connection management migration through the network element proxy layer; Step B. The ASON head node goes to each relevant ASON node. Send a connection request for management of the connection;

Step C. Perform a migration operation on each ASON node, and notify the network element generation of the intermediate migration result. The management layer of the network element reports the intermediate migration result to the network management layer; Step D. The ASON first node passes the final migration result to the network management layer through the network element proxy layer;

Step E. The network management layer decides whether to move the SPC connection information according to the final migration result. In the foregoing step C, if the intermediate migration result is successful, the network element proxy layer needs to add or delete the corresponding permanent connection information, and after reporting the result information to the network management layer, the network management layer also needs to add or delete the corresponding permanent Connection information; If the intermediate migration result is a failure, the network agent layer does not modify the permanent connection information, and the result information is reported to the network management layer, and the network management layer does not modify the permanent connection information. In the above step E, if the final migration result is successful, the network management layer needs to add or delete the corresponding soft permanent connection information; if the final migration result is a failure, the network management layer does not modify the soft permanent connection information. When the network element proxy layer adds the permanent connection information, only the added permanent connection information is saved in the database and is not sent to the transmission plane; when the network element proxy layer deletes the permanent connection information, only the corresponding permanent connection in the database is deleted. The information is deleted and is not sent to the delivery plane. In the present invention, two aspects involved in the migration of the connection management are: PC and SPC, that is, the processing of the permanent connection information and the soft permanent connection information is as follows: after the permanent connection information is successfully migrated, the network element is notified after each ASON node is successfully executed. The agent layer is saved by the network element agent layer and reported to the network management layer to ensure the consistency of the two information. The soft permanent connection information is migrated by the network management layer according to the final migration result.

The implementation of the technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments may be arbitrarily combined with each other without conflict. As shown in FIG. 3, the process of the PC migration to the SPC in the embodiment of the present invention is specifically described as follows: Step 1: The network management layer notifies the ASON head node to perform the PC migration to the SPC operation. Step 2: The ASON head node sends/notifies each relevant ASON node to perform the PC migration to the SPC request. Step 3: Each ASON node performs The migration operation is performed, and the result is notified to the network element proxy layer. If the result is successful, the network element proxy layer deletes the corresponding permanent connection information, and reports the deleted information to the network management layer; if the result is a failure, the network element proxy layer does not modify Permanent connection information; Step 4: The ASON head node notifies the network management layer of the final migration result; Step 5: The network management layer performs the final processing. If the migration result is successful, the network management layer adds the corresponding soft permanent connection information and saves the storage, and the process ends. If the migration result is a failure, the network management layer does not add the soft permanent connection information, and the process ends.

As shown in FIG. 4, the flow of the SPC migration to the PC in the embodiment of the present invention is specifically described as follows: Step 1: The network management layer notifies the ASON head node to perform the SPC migration to the PC operation; Step 2: The ASON head node notifies each related The ASON node performs the SPC migration request to the PC; Step 3: Each ASON node performs a migration operation, and notifies the network element proxy layer of the result. If the result is successful, the network element agent layer adds the corresponding permanent connection information, and reports the added information to the network management layer; if the result is a failure, the network element agent layer does not modify the permanent connection information; Step 4: The ASON head node puts the final The migration result informs the network management layer; Step 5: The network management layer performs the final processing. If the migration result is successful, the network management layer deletes the corresponding soft permanent connection information and saves the storage, and the process ends. If the migration result is unsuccessful, the network management layer does not modify the soft permanent connection information, and the process ends.

Correspondingly, the embodiment of the present invention further provides a migration management system for the connection management in the optical switching network. As shown in FIG. 2, the system mainly includes the following functional network elements: The network management layer device, the main configuration is as follows: Requesting and receiving on the network element proxy layer device Reporting data and performing the final migration process; the network element proxy layer network element is mainly configured to: transmit information between the network management layer network element and the ASON control plane network element, and have its own database for storing permanent connection information;

The ASON control plane network element is mainly set as follows: The process of leading the migration, coordinating multiple ASON nodes to complete the migration operation together. The network management layer network element further includes an SPC migration decision processing module, and the SPC migration decision processing module is configured to: according to the final migration result reported by the ASON head node, the SPC connection information of all the ASON nodes is successfully migrated according to the final migration result. When the decision is made, the soft permanent connection information is migrated. In addition, the network management layer network element further includes a PC migration processing module, where: the network element proxy layer network element is configured to: after receiving an intermediate migration result notified by the relevant ASON node performing the connection management migration, to the network The management network element reports the intermediate migration result information. The PC migration processing module is configured to: perform permanent connection information migration according to the intermediate migration result information reported by the network element proxy layer network element. In addition, the network element proxy layer network element is further configured to: if the intermediate migration result is successful, report the intermediate migration result information to the network management layer network element after adding or deleting the corresponding permanent connection information; If the result of the intermediate migration is a failure, the network element of the network element of the network element does not perform the modification of the permanent connection information, and directly reports the intermediate migration result information to the network management network element. The PC migration processing module is further configured as: If the result of the intermediate migration is successful, the corresponding permanent connection information is added or deleted. If the intermediate migration result is a failure, the permanent connection information is not modified. In addition, the SPC migration decision processing module is further configured to: when the decision is made to migrate the soft permanent connection information, the corresponding soft permanent connection information is added or deleted; when the decision is not to perform the soft permanent connection information migration, the soft permanent is not performed. Modification of connection information. In addition, the network element proxy layer network element only saves the added permanent connection information in the database when the permanent connection information is added, and does not send the information to the ASON transport plane network element; the network element proxy layer network element deletes the permanent connection. Information, only the corresponding permanent in the database The connection information is deleted and is not sent to the ASON transport plane network element.

The embodiment further provides a network management network element in the automatic switching optical network, where the network management network element includes a soft permanent connection (SPC) migration decision processing module, where: the SPC migration decision processing module is set to According to the final migration result reported by the first node of the ASON, when the final migration result is that the SPC connection information of all the ASON nodes is successfully migrated, the decision is made to migrate the soft permanent connection information. Preferably, the network management layer network element further includes a permanent connection (PC) migration processing module, where the PC migration processing module is configured to: the intermediate network agent layer receives the intermediate migration of the relevant ASON node notification for performing the connection management migration. After the result, the migration information of the middle is migrated to the network management layer network element, and the permanent connection information is migrated according to the intermediate migration result information reported by the network element proxy layer. The PC migration processing module is set to Performing the migration of the persistent connection information according to the intermediate migration result information reported by the network element proxy layer as follows: According to the intermediate migration result reported by the network element proxy layer, if the intermediate migration result is successful, the corresponding increase or delete is performed. The permanent connection information; if the intermediate migration result is a failure, the modification of the permanent connection information is not performed. The SPC migration decision processing module is further configured to: when the decision is made to migrate the soft permanent connection information, add or delete the corresponding Soft permanent connection information; when the decision does not perform soft permanent connection information migration , the modification of the soft permanent connection information is not performed.

In summary, the migration management scheme of the connection management of the present invention involves a network management layer, a network element proxy layer, and an ASON control plane, and focuses on the processing of the network management layer and the network element proxy layer; The compatibility of the existing network configuration ensures the effective management of the network management layer and improves the efficiency of the network management layer.

One of ordinary skill in the art can understand that all or part of the above steps can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, such as read only. Memory, disk or disc, etc. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software. It should be understood that those skilled in the art to which the present invention pertains may make corresponding equivalent changes or substitutions in accordance with the technical solutions of the present invention, and all such changes or substitutions should be included in the appended claims. The scope of protection.

INDUSTRIAL APPLICABILITY The technical solution of the present invention avoids multiple migrations and intermediate migration in the case of migration failure, thereby improving migration efficiency and reducing the burden on the network management layer; and ensuring the network element agent layer and network management layer The information is consistent, which is consistent with the traditional method of connection configuration through the network management layer. In addition, the solution of the present invention does not affect the existing transmission service regardless of whether the migration is successful or not.

Claims

Claim

A migration method for connection management in an automatic switched optical network, the method comprising: the network management layer according to a final migration result of >3⁄4 on the first node of the automatic switched optical network (ASON), where the final migration result is all ASON nodes. When the soft permanent connection (SPC) information migration succeeds, the decision is made to migrate the soft permanent connection information.

2. The method according to claim 1, wherein the method further comprises: the network management layer notifying the ASON head node to perform connection management migration by using the network element proxy layer;

The ASON head node passes the final migration result to the network management layer through the network element proxy layer; the network management layer decides whether to perform the soft permanent connection information migration according to the final migration result.

The method of claim 2, further comprising: if the intermediate migration result is successful, the network element proxy layer reports the intermediate migration result information to the network management layer after adding or deleting the corresponding permanent connection information. The network management layer also adds or deletes the corresponding permanent connection information; if the intermediate migration result is a failure, the network element proxy layer does not modify the permanent connection information, and directly reports the intermediate migration result information to the network management layer, and the network Management does not make changes to the permanent connection information.

The method according to claim 1, 2 or 3, wherein, when the network management layer decides to perform the migration of the soft permanent connection information, the method further includes: adding, by the network management layer, the corresponding soft permanent connection information; The method further includes: when the network management layer determines that the soft permanent connection information is not migrated, the network management layer does not modify the soft permanent connection information.

The method according to claim 3, wherein, when the network element proxy layer adds the persistent connection information, only the added permanent connection information is saved in the database, and is not sent to the transmission plane; When the permanent connection information is deleted, only the corresponding permanent connection information in the database is deleted and is not sent to the delivery plane.

A migration management system for connection management in an optical switching network, the system comprising a network management layer network element, wherein the network management layer network element comprises a soft permanent connection (SPC) migration decision processing module, wherein: the SPC migration The decision processing module is configured to: according to the final migration result reported by the first node of the ASON, when the final migration result is that the SPC connection information of all the ASON nodes is successfully migrated, the soft permanent connection information is decided to be migrated.

The system of claim 6, wherein the system further comprises a network element proxy layer network element, wherein the network management layer network element further comprises a permanent connection (PC) migration processing module, and the network element proxy layer network The element is configured to: report the intermediate migration result information to the network management layer network element after receiving the intermediate migration result of the related ASON node notification that performs the connection management migration; the PC migration processing module is configured to: according to the network element proxy The intermediate migration result information reported by the layer network element performs the migration of the permanent connection information.

8. The system according to claim 7, wherein the network element proxy layer network element is configured to perform intermediate migration result information to the network management layer network element as follows: if the intermediate migration result is successful After the corresponding permanent connection information is added or deleted, the intermediate migration result information is reported to the network management network element; if the intermediate migration result is failed, the network element proxy layer network element does not modify the permanent connection information. Directly reporting the intermediate migration result information to the network management network element; The PC migration processing module is configured to perform the migration of the persistent connection information according to the intermediate migration result information reported by the network element proxy layer in the following manner: according to the intermediate migration result reported by the network element proxy layer network element, if If the intermediate migration result is successful, the corresponding permanent connection information is added or deleted; if the intermediate migration result is failed, the permanent connection information is not modified.

9. The system according to claim 6, 7 or 8, wherein the SPC migration decision processing module is further configured to: add or delete corresponding soft permanent connection information when the decision is made to migrate the soft permanent connection information; When the soft permanent connection information is not migrated, the soft permanent connection information is not modified.

The system of claim 9, wherein the network element proxy layer network element is further configured to: when the permanent connection information is added, only the added permanent connection information is saved in the database, and is not sent to the transmission plane; When the permanent connection information is deleted, only the corresponding permanent connection information in the database is deleted and is not sent to the delivery plane.

11. A network management network element in an automatic switched optical network, where the network management network element includes a soft permanent connection (SPC) migration decision processing module, where: the SPC migration decision processing module is set to: according to the ASON first The final migration result reported by the node is used to decide to migrate the soft permanent connection information when the final migration result is that the SPC connection information of all ASON nodes is successfully migrated.

The network management layer network element of claim 11, wherein the network management layer network element further comprises a permanent connection (PC) migration processing module, and the PC migration processing module is configured to: the receiving network element proxy layer is After receiving the intermediate migration result of the related ASON node notification of the connection management migration, the intermediate migration result information of the "^" on the network management layer network element is performed, and the permanent migration result information reported by the network element proxy layer is permanently performed. Migration of connection information.

13. The network management layer network element according to claim 12, wherein The PC migration processing module is configured to perform the migration of the persistent connection information according to the intermediate migration result information reported by the network element proxy layer according to the following: according to the intermediate migration result reported by the network element proxy layer, if the intermediate migration If the result is successful, the corresponding permanent connection information is added or deleted; if the intermediate migration result is a failure, the modification of the permanent connection information is not performed.

The network management layer network element according to claim 11 or 12 or 13, wherein the SPC migration decision processing module is further configured to: add or delete a corresponding soft permanent when the decision is made to migrate the soft permanent connection information. Connection information; When the decision does not perform the migration of the soft permanent connection information, the modification of the soft permanent connection information is not performed.