KR100258767B1 - Method and device for automatic recovery of persistent virtual connection in asynchronous transfer mode multimedia switching system - Google Patents

Abstract

PURPOSE: A method and apparatus for automatically restoring a permanent virtual connection in an ATM-MSS(ATM Multimedia Switching System) is provided to automatically restore a permanent virtual connection as before, after recognizing that a fault generated in a subscriber board has been recovered. CONSTITUTION: An apparatus for automatically restoring a permanent virtual connection in an ATM-MSS is comprised of an ATM-MSS, an EMS(Element Management System) and a subscriber board loading/unloading check cable. The ATM-MSS is composed of a system management part, a node control board, a switch part, a clock supply part, and a subscriber board. An EMS is operated on a workstation and manages the whole system. The subscriber board loading/unloading check cable, connecting the node control part and the subscriber board, checks the loading and unloading of the subscriber board.

Description

Method and device for automatic recovery of persistent virtual connection in asynchronous transfer mode multimedia switching system

The present invention relates to a method and apparatus for automatically recovering a permanent virtual connection (PVC) in an asynchronous transfer mode multimedia switching system (hereinafter referred to as ATM-MSS). The present invention relates to a method and apparatus for automatically recovering existing connection information when a subscriber board connected to a virtual connection is recovered after a failure occurs.

In general, to provide a service for a permanent virtual call in ATM-MSS is processed in the following order.

If you issue a permanent virtual connection between the calling party and the called party from the graphical menu of the connection management module of the element management system (EMS), the connection management module of the node management assembly (NMA) receives this message. The calling party is requested to make a connection from the calling party to the called party, and the calling party is required to perform a connection from the called party to the calling party.

When the connection management module of the subscriber board receives this request, the connection management module analyzes the received information so that a specific virtual pass (VP) from the subscriber is transferred to the virtual path / virtual channel (VC). When (ATM Cell) comes in, the virtual path or virtual path / virtual channel required by the called subscriber board is converted and stored in the memory to be switched to the called subscriber board.

After this series of things is done, the establishment of the permanent virtual connection is completed by responding to the NMA from the subscriber board and the element management system from the NMA.

In this way, after the permanent virtual connection is completed, the calling party and the called party can transmit data to each other through a preset virtual path or virtual path / virtual channel.

In this case, if the subscriber board fails during the service or a problem occurs and the board needs to be replaced, all the connection information of the subscriber board is lost. Therefore, the previously established connection information must be restored, but the entire system cannot be restored. There is a problem of initializing and establishing a new connection from the beginning.

Therefore, the present invention was devised to solve the above problems, and recognizes that the failure was recovered when the subscriber board was recovered after a failure while transmitting and receiving data between the incoming and outgoing subscribers through a permanent virtual connection. It is an object of the present invention to provide a method and apparatus for automatically recovering a permanent virtual connection.

Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention and the accompanying drawings.

1 is a configuration diagram of ATM-MSS applied to the present invention.

2 is an ATM-MSS configuration diagram according to the present invention.

One preferred embodiment of a method for establishing a permanent virtual connection in an ATM-MSS according to the present invention, which is designed to achieve the above object, is to provide a permanent virtual connection between an originating subscriber and a destination subscriber in an element management system. ,

Inputting necessary information and then making a connection request;

Connecting, by the connection management module of the element management system, the connection request message to a connection management module of the node control module by arranging the connection request message into a message negotiated with the connection management module of the node control module;

When the connection management module of the node control board receives the connection request message, storing the connection information in a memory so that the subscriber board can use the connection information when recovering after a failure;

Storing the connection information in a memory and transmitting the connection information to a calling party;

After the connection management module of the originating subscriber board receives the transmitted connection information, the asynchronous transmission mode cell coming from the subscriber in the corresponding virtual path or virtual path / virtual channel can be switched to the called party so as to switch to the called party. Storing a virtual path or a virtual path / virtual channel to be transmitted to the side in a specific memory and transmitting a connection completion response message to the node control board;

Transmitting, by the connection management module of the node control board, connection information to the called party when receiving a message indicating that the calling party connection is normally completed;

After receiving the transmitted connection information, the connection management module of the called subscriber board transmits the asynchronous transmission mode cell from the subscriber to the corresponding virtual path or virtual path / virtual channel to the calling party so as to switch to the calling party. Storing a virtual path or virtual path / virtual channel to be transmitted in a specific memory and transmitting a connection completion response message to the node control board;

Transmitting a message indicating that a permanent virtual connection is completed to the connection management module of the element management system when all of the connection management module of the node control board receives the incoming / outgoing connection completion message; And

Receiving the message that the permanent virtual connection is completed, and comprises the step of completing the permanent virtual connection setup in the ATM-MSS.

In the present invention, the information that needs to be input preferably includes a bandwidth amount of the incoming / outgoing subscriber number, the incoming / outgoing virtual path or virtual path / virtual channel, and how far to allow data transmission.

According to the present invention for achieving the above object, a preferred embodiment of a method for automatically recovering a permanent virtual connection in ATM-MSS, the replacement due to the failure of the subscriber board during the operation of establishing a plurality of permanent virtual connection Or when the connection information set in the subscriber board is lost at the time of repair, and automatically recovers the lost connection information in the subscriber information.

Detecting disconnection / mounting failure information on the subscriber board with a subscriber board release / mounting check cable in a failure management module of a node control board;

Reporting hernia failure information to the element management system when the subscriber board is hernia;

If the subscriber board is repaired and mounted, transmitting a message indicating that the failure has been repaired and mounted to the element management system and displaying the message on the screen of the element management system;

When the board is initialized and normally performed in the failure management module of the mounted subscriber board, transmitting a message to the node control module that initialization of the board is completed;

Receiving a message indicating that the initialization of the subscriber board is completed after the failure management module detects that the subscriber board is mounted in the node control board;

When the connection management module receives the initialization completion message, sequentially reading the permanent virtual connection information of the corresponding subscriber from the stored connection information one by one and requesting the permanent virtual connection setting to the corresponding subscriber board; And

The request for establishing the permanent virtual connection is performed by the ATM-MSS automatically performing the connection recovery for the permanent virtual connection.

In the present invention, when the initialization of the subscriber board receives a completion message, it is preferable to send a message to the element management system and the connection management module in the node control board.

According to an embodiment of the present invention for achieving the above object, a preferred embodiment of the apparatus for automatically recovering a permanent virtual connection in ATM-MSS,

An ATM-MSS including a system manager, a node controller, a switch, a clock supply, and a subscriber board;

An element management system operating on a workstation and managing the system; And

And a subscriber board detachment / mounting check cable, which is a cable connecting the node control unit and the subscriber board unit to check the detachment / mounting of the subscriber board.

In the present invention, it is preferable that the element management system, the node control board, and the subscriber board each include a configuration management module, a node control module, a failure management module, and a performance management module.

In the element management system, the node control board and the subscriber board, it is preferable that a module-specific interface is possible.

It is preferable that each module between the element management system and the node control board, the node control board and the subscriber board can interface with each other,

The node control module in the node control board preferably has a connection information storage memory that stores permanent virtual connection information so that the subscriber board can find and recover the connection information of the corresponding subscriber board in case of recovery after failure. .

Hereinafter, the configuration and operation principle of the present invention with reference to the accompanying drawings in detail as follows.

2 is a block diagram of an ATM-MSS according to the present invention. According to the present invention, the ATM-MSS is composed of an element management system for managing the system is operated on the workstation, the system is composed of a system management unit, node control unit, switch unit, clock supply unit, subscriber board unit.

The element management system, node control board, and subscriber board are composed of configuration management, node control, fault management, and performance management modules, respectively.

Each module between the element management system and each board unit can be interfaced, and each module between the element management system, the node controller, the node controller, and the subscriber board can interface with each other.

The node control module in the node control unit stores permanent virtual connection information so that the subscriber board can find and recover the connection information of the corresponding subscriber board when recovering after failure.

In detail, the element management system needs information to make a permanent virtual connection between the calling party and the called party (incoming / outgoing subscriber number, incoming / outgoing virtual path or virtual path / virtual channel, and data transmission. After the connection request is made, the connection management module of the element management system organizes the connection with the node management module's connection management module in the form of a negotiated message on request and manages the connection of the node control module. Send to module When the connection management module of the node control board receives the connection request message, the connection information is stored in the memory so that the subscriber board can use the connection information when recovering after failure.

After storing in the memory, the connection information is sent to the calling party. After receiving this message, the connection management module of the originating subscriber board will switch to the called party's switch number so that the asynchronous transmission mode cell coming from the subscriber to the corresponding virtual path or virtual path / virtual channel can be switched to the called party. In addition, the virtual path or virtual path / virtual channel to be transmitted to the called party is stored in a specific memory and a connection completion response message is transmitted to the node control board.

When the connection management module of the node control board receives the message that the calling party connection is completed normally, it transmits the connection information to the called party. After receiving this message, the connection management module of the called party's board receives the switch number of the calling party's board and the virtual number to be sent to the calling party so that the asynchronous transmission mode cell coming from the subscriber in the corresponding virtual path or virtual path / virtual channel can switch to the calling party. The path or virtual path / virtual channel is stored in a specific memory and a connection complete response message is sent to the node control board.

When all incoming / outgoing connection completion messages are received by the connection management module of the node control board, the connection management module of the element management system sends a message that the permanent virtual connection is completed, and upon receiving this message, the ATM-MSS establishes a permanent virtual connection. Is complete.

In the same flow as above, if a permanent board connection is established and a subscriber board breaks down during operation and is replaced or repaired, replace it with another board having the same function. In this case, all the connection information set in the subscriber board is lost.

A detailed explanation of how to automatically recover the connection information lost in this subscriber information begins.

When the board is replaced to maintain the subscriber board, the removal / mounting failure information of the subscriber board can be immediately detected by the subscriber board removal / mounting check cable in the failure management module of the node control board. When the board is herniad, hernia failure information is reported to the element management system. When the board is repaired and mounted, a message indicating that the failure has been repaired and mounted is transmitted to the element management system and displayed on the screen of the element management system. When the board is initialized and normally executed in the failure management module of the mounted subscriber board, a message indicating that the board initialization is completed is transmitted to the node control module. When the node control board detects that the subscriber board is mounted, the node control board sends a message to the element management system but also sends a message to the connection management module in the node control board.

When this message is received by the connection management module, the connection recovery for the persistent virtual connection is performed by ATM-MSS by reading the subscriber's persistent virtual connection information one by one and sequentially requesting the permanent virtual connection to the corresponding subscriber board. It is done automatically.

While the invention is susceptible to various modifications and alternative forms, the disclosure thereof has been described with reference to specific embodiments only. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the specification, but rather that the invention is intended to cover all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. It should be understood to include.

According to the present invention operating as described above, when the subscriber board is mounted after mounting, the permanent virtual connection is automatically restored, so that the operator does not need to set up the permanent virtual connection or take additional measures.

Claims (9)

When the element management system makes a permanent virtual connection between the calling subscriber and the called subscriber, Inputting necessary information and then making a connection request; Connecting, by the connection management module of the element management system, the connection request message to a connection management module of the node control module by arranging the connection request message into a message negotiated with the connection management module of the node control module; When the connection management module of the node control board receives the connection request message, storing the connection information in a memory so that the subscriber board can use the connection information when recovering after a failure; Storing the connection information in a memory and transmitting the connection information to a calling party; After the connection management module of the originating subscriber board receives the transmitted connection information, the asynchronous transmission mode cell coming from the subscriber in the corresponding virtual path or virtual path / virtual channel can be switched to the called party so as to switch to the called party. Storing a virtual path or a virtual path / virtual channel to be transmitted to the side in a specific memory and transmitting a connection completion response message to the node control board; Transmitting, by the connection management module of the node control board, connection information to the called party when receiving a message indicating that the calling party connection is normally completed; After receiving the transmitted connection information, the connection management module of the called subscriber board transmits the asynchronous transmission mode cell from the subscriber to the corresponding virtual path or virtual path / virtual channel to the calling party so as to switch to the calling party. Storing a virtual path or virtual path / virtual channel to be transmitted in a specific memory and transmitting a connection completion response message to the node control board; Transmitting a message indicating that a permanent virtual connection is completed to the connection management module of the element management system when all of the connection management module of the node control board receives the incoming / outgoing connection completion message; And And receiving a message indicating that the permanent virtual connection is completed, completing a permanent virtual connection establishment in an ATM-MSS. 2. The persistent virtual in an ATM-MSS of claim 1, wherein the information requiring input includes an incoming / outgoing subscriber number, an incoming / outgoing virtual path or virtual path / virtual channel, and a bandwidth amount to allow data transmission. How to establish a connection. In the case of replacing or repairing due to a failure of a subscriber board while setting up and operating a plurality of permanent virtual connections, the connection information set in the subscriber board is lost, and automatically recovers the lost connection information in the subscriber information. , Detecting disconnection / mounting failure information on the subscriber board with a subscriber board release / mounting check cable in a failure management module of a node control board; Reporting hernia failure information to the element management system when the subscriber board is hernia; If the subscriber board is repaired and mounted, transmitting a message indicating that the failure has been repaired and mounted to the element management system and displaying the message on the screen of the element management system; When the board is initialized and normally performed in the failure management module of the mounted subscriber board, transmitting a message to the node control module that initialization of the board is completed; Receiving a message indicating that the initialization of the subscriber board is completed after the failure management module detects that the subscriber board is mounted in the node control board; When the connection management module receives the initialization completion message, sequentially reading the permanent virtual connection information of the corresponding subscriber from the stored connection information one by one and requesting the permanent virtual connection setting to the corresponding subscriber board; And And automatically performing connection recovery for a permanent virtual connection in an ATM-MSS by requesting the permanent virtual connection establishment. 4. The method of claim 3, wherein upon initialization of the subscriber board receives a completion message, it sends a message to the element management system and a connection management module in the node control board. An ATM-MSS including a system manager, a node controller, a switch, a clock supply, and a subscriber board; An element management system operating on a workstation and managing the system; And a subscriber board dismount / mount check cable, which is a cable for connecting the node controller to the subscriber board to check the dismount / mount of the subscriber board. 6. The system of claim 5, wherein the element management system, the node control board, and the subscriber board each have a configuration management module, a node control module, a failure management module, and a performance management module. Device. 7. The apparatus of claim 6, wherein the element management system, the node control board, and the subscriber board are capable of module-specific interfaces. 7. The apparatus of claim 6, wherein each module between the element management system and the node control board and between the node control board and the subscriber board can interface with each other. 7. The node control module of claim 6, wherein the node control module in the node control board has a connection information storage memory that stores permanent virtual connection information so that the subscriber board can find and recover connection information of the corresponding subscriber board when the subscriber board recovers after failure. A device that automatically recovers persistent virtual connections in ATM-MSS.