KR20040056906A - Dual ATM traffic control board expanding device of the ATM system and controlling method therefore - Google Patents

Abstract

PURPOSE: An apparatus for extending a dual interface board in an ATM system and a method for controlling the same are provided to improve the switching extensibility of an ATM switch by extending the switching port resources of the ATM switch in large quantities. CONSTITUTION: An ATM transmission system(1) consists of a control board(2), an egress interface board(4), an ATM switch(5), dual interface boards(6), and subscriber boards(8). The control board(2) controls the connection setup or maintenance/management of the ATM transmission system(1). The egress interface board(4) interfaces a data signal, routed from an external transmission equipment(3), to the ATM transmission system(1). The ATM switch(5) analyzes the routing information of the data signal, interfaced by the ATM transmission system(1), and outputs it through a switching port according to a switching signal of the control board(2). Each of the dual interface boards(6) is respectively connected to each of the switching ports of the ATM switch(5) in a dual structure of a master and a slave. The subscriber boards(8) process a large quantity of ATM data transmitted from external subscriber systems(7).

Description

Dual ATM traffic control board expanding device of the ATM system and controlling method therefore}

The present invention relates to a dual matching board expansion device of ATM system and a control method thereof. In particular, a plurality of matching boards are connected to one switching port of an ATM switch, and the data cells to be copied / integrated are processed. A dual matching board expansion device of the ATM system and a control method thereof.

In general, the transmission technology began with the spiral carrier in the 1910s, developed into the analog transmission technology, and in the form of the digital transmission technology. Later, the digital transmission technology has evolved the development of the D1 channel bank with a 1.544Mbps transmission speed in the 1960s. It was. Moreover, such digital technology has been applied to the field of exchange technology in the mid-1970s. It has revolutionized the multiplexing of wired transmission systems by introducing the digital relay switch called 4ESS. In addition, the digital transmission method has been developed into an optical transmission method using an optical cable as a transmission medium. Currently, transmission systems using an asynchronous transmission mode have been used. At this time, the ATM signal used in the asynchronous transmission mode as described above is a dedicated-connection switching technique for dividing digital data into 53 bytes of cells or packets and transmitting them through a medium using digital signal technology. One cell is individually processed asynchronously with respect to the other cells and placed in a queue for multiplexing for circuit sharing. The ATM is designed to be easier to implement in hardware than software, so it is possible to speed up processing. The transmission speed of ATM networks currently used is about 155.520 Mbps or 622.080 Mbps, but the IEEE spectrum reports that this rate is expected to reach 10 Gbps soon. ATM, along with SONET and several other technologies, is the core technology of the broadband ISDN (BISDN).

Then, referring to the asynchronous transmission mode ATM transmission system as described above with reference to FIG. 1, an external subscriber device 70, for example, a subscriber equipped with a LAN card to process a large amount of ATM data transmitted from a device that transmits and receives an ATM signal. According to the connection setting information of the control board (73) and the control board (73) for controlling the connection setting and maintenance management of the ATM transmission system 72, including the board 71, the subscriber board (71) A plurality of matching boards 74 for calculating and matching data transmitted from the subscriber board 71 to a set table such as a constant bite rate (CBR) or a variable bite rate (VBR) table, and the plurality of matching boards ( An ATM switch 75 for analyzing and outputting routing information according to the switching signal set by the control system board 73, and a data signal routed through the ATM switch 75; By converting the cell format according to the routing device consists of a Grass constant total board 77 for transmission to an external transport device 76.

Here, the capacity that the one matching board 74 can process is about 600M.

On the other hand, the operation of the conventional asynchronous transfer mode ATM transmission system as described above, first, when the ATM data is input from the external subscriber device 70 to the subscriber board 71, the subscriber board 71 from the control system board 73 The subscriber data is output to any one of the plurality of matching boards 74 according to the input control signal. Then, the matching board 74 analyzes the connection setting information of the control board 73, analyzes whether it is a CBR connection or a VBR connection, and inserts data into the corresponding connection bandwidth table.

For example, when the matching control board 73 requests a CBR connection, the matching board 74 calculates a bandwidth, sets the connection table, and transmits the bandwidth to the ATM switch 75. Similarly, the matching board 74 calculates the bandwidth that is input during connection establishment among the predetermined bandwidths in the table configured as the VBR bandwidth when the upper control board 73 requests CBR connection, and sets the bandwidth in the connection table. Transfer to 75.

Accordingly, the ATM switch 75 analyzes the routing information according to the switching signal set by the control system board 73 to the subscriber data signal matched by the input matching board 74, and thus the grass matching board 77. To the output. Then, the grass matching board 77 converts the cell format of the data signal routed through the ATM switch 75 according to the corresponding routing device and transmits the data to the external transmission device 76.

However, the conventional asynchronous transfer mode ATM transmission system as described above can be connected to one switching port because, for example, one matching port having a limited bandwidth of 600M is connected to one switching port of the ATM switch. As the number of subscriber boards is limited, the number of subscriber boards is limited, and the maximum number of subscriber boards that can be managed by one matching board is limited. Therefore, the scalability of ATM switches can be considerably reduced. There was a problem.

Accordingly, the present invention has been invented to solve the above-mentioned conventional problems. Since the switching port resources of the ATM switch can be expanded in a large amount, the dual matching system of the ATM system greatly improving the switching scalability of the ATM switch. Provides a board expansion device and its control method.

Another object of the present invention is to provide a multi-matching board expansion apparatus and control method of the ATM system that can accommodate a large number of subscriber boards through a plurality of matching boards, thereby significantly expanding the capacity of the ATM switch. .

The present invention for achieving the above object in the ATM transmission system for transmitting and processing the ATM cell data up, down, the control system board is set through any of the switching port consisting of a plurality of switching ports in the ATM transmission system An ATM switch for analyzing and outputting routing information according to a switching signal, and a dual matching board for matching subscriber data according to a set control signal connected in a dual structure to each one of a plurality of switching ports installed in the ATM switch. It provides a dual matching board expansion device of ATM system.

Another feature of the present invention is a connection configuration information analysis step of determining the connection configuration information by analyzing the connection configuration information set from the control system board of the asynchronous ATM system, and confirms that the data currently processed after the connection configuration information analysis step is an uplink data cell. If the master matching board merges the data inputted from the slave matching board with its own data upstream data matching step to output to the switching port of the ATM switch, and the data currently processed after the connection configuration information analysis step When it is confirmed that the downlink data cell is a downlink data matching step of copying the data cell inputted by the master matching board to the slave matching board and selectively processing the data cells in each of the dual matching board, and the upstream Dual matching board after data matching step and downstream data matching step A connection data processed by the cell to provide a control method of the downlink data routing phase dual constant total board of this TM system of the expansion unit to be routed to its destination.

1 is an explanatory diagram illustrating a conventional ATM system.

2 is an explanatory diagram illustrating an ATM system of the present invention.

3 is a flowchart of the present invention.

<Detailed Description of Codes>

1: ATM transmission system 2: control board

3: External Transmission Device 4: EEG Match Board

5: ATM switch 6: dual matching board

7: External subscriber device 8: Subscriber board

9: first cable 10: master matching system

11: second cable 12: slave matching

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The apparatus of the present invention is a control system board (2) for controlling connection establishment and maintenance management of an ATM transmission system (1) as shown in FIG. 2, and routing from an external transmission device (3) to the ATM transmission system (1). The match matching board (4) for converting the data format of the data signal or the routing of the data signal routed to the external network according to the corresponding routing equipment and transmitted to the external transmission device (3), and the grass matching board ( An ATM switch 5 for analyzing and outputting routing information according to a switching signal set by the control system board 2 through any one switching port configured with a plurality of data signals matched by 4), and the ATM switch 5 Each one of the plurality of switching ports constituting a) is connected to a dual structure of a plurality of master (Master) and slave (Slave), for example, of the corresponding port set in accordance with the connection setting information of the control system board (2) Tables, for example, a dual matching board 6 for calculating a total sum of CBR or VBR and deleting and connecting individual connection bandwidths according to the result, to match subscriber data, and an external subscriber device with the dual matching board 6; (7) For example, a subscriber board 8 which is equipped with a LAN card and processes a large amount of ATM data transmitted from a subscriber device that transmits and receives an ATM signal.

In addition, the dual matching board 6 is connected to the switching port of the ATM switch 5 via the first cable 9 to copy and transmit data cells that are received downward, COPY and merge the data cells upward. The master matching system 10 to be processed and the downlink data cell connected to the master matching system 10 via the second cable 12 and copied and analyzed are selected and processed. It consists of a slave matching system 12 to transmit to (10).

Next, the control method of the present invention as described above will be described in detail.

The present invention proceeds to the connection setting information analysis step (S2) in the initial state (S1) as shown in Figure 3 to analyze the connection setting information set from the control system board to determine the connection setting information. After the connection setting information analyzing step S2, the process proceeds to an uplink data cell determination step S3 to determine whether the data currently being processed is an uplink data cell. At this time, if the data currently processed is an uplink data cell as determined in the uplink data cell determination step (S3), the process proceeds to the uplink data matching step (S4), and the master matching board receives data inputted from the slave matching board. Merge with and output to the switching port of the ATM switch.

However, if the data currently being processed is not an uplink data cell as a result of the determination in the uplink data cell determination step (S3), the process proceeds to a downlink data cell determination step (S5) to determine whether the currently processed data is a downlink data cell. In this case, when the data currently being processed is not the downlink data cell as a result of the determination in the downlink data cell determination step S5, the process ends. However, if the data currently being processed is a downlink data cell as judged during the downlink data cell determination step (S5), proceed to the downlink data matching step (S6), copy the data cell to which the master matching board is input, and then slave matching system. By transferring to the board, these data cells are optionally processed on each of the dual matching boards.

Meanwhile, after the uplink data matching step S4 and the downlink data matching step S6, the data processing step is routed to the corresponding destination by the dual matching boards.

In other words, when the ATM data upward from the external subscriber device 7 to the subscriber board 8 is input, the subscriber board 8 receives a plurality of subscriber data according to the control signal input from the control system board 2. The dual matching board 6 is outputted to any one of the designated dual matching board 6. Then, the dual matching board 6 analyzes the connection setting information of the control board 2 and analyzes whether it is a CBR connection or a VBR connection, and inserts data into the corresponding connection bandwidth table.

For example, the master matching system 10 and the slave matching system 12 of the dual matching board 6 have a predetermined bandwidth in a table composed of 32 CBR bandwidths when the upper control board 2 requests a CBR connection. Among them, the smallest bandwidth is calculated and transmitted to the connection table.

At this time, the slave matching system 12 inputs the processed data signal to the master matching system 10 through the second cable 11, and thus the master matching system 10 is connected from the slave matching system 12. The input data is merged with its own data and then transmitted to the corresponding switching port of the ATM switch 5 through the first cable 9.

Accordingly, the ATM switch 5 analyzes the routing information according to the switching signal set by the control system board 2 to the subscriber data signal matched by the input dual matching board 6, and thus the grass matching board 4 ) Then, the grass matching board 4 converts the cell format of the data signal routed through the ATM switch 5 according to the corresponding routing device and transmits the data to the external transmission device 3.

On the contrary, in contrast to the above process, when the downlink data cell signal is switched to the master matching system 10 of the dual matching board 6 through the ATM switch 5, the master matching system 10 is connected to the ATM switch 5. The data cell received from the device is copied as it is and output to the slave matching system 12 through the second cable 11. Therefore, the master matching system 10 and the slave matching system 12 accurately analyze and process whether the same data cell is currently a cell to be selected by itself, and transmits the same to the subscriber board 8.

Therefore, according to the present invention as described above, not only can the resources of limited switching ports be efficiently used, but also the number of subscriber boards can be greatly expanded.

As described above, the present invention can extend the switching port resources of an ATM switch by connecting a plurality of matching boards to one switching port of the ATM switch and copying / processing the data cells being in / egressed. This has the advantage of significantly improving the switching scalability of ATM switches.

In addition, according to the present invention, since a large number of subscriber boards can be accommodated through a plurality of matching boards, the capacity of the ATM switch can be considerably expanded accordingly.

Claims (3)

In an ATM transmission system for transmitting and processing ATM cell data up and down, An ATM switch for analyzing and outputting routing information according to a switching signal set by a control system board through an arbitrary switching port among a plurality of switching ports in the ATM transmission system, and each of a plurality of switching ports installed in the ATM switch. Dual matching board expansion apparatus of the AMT system, characterized in that it comprises a dual matching board for matching subscriber data in accordance with a control signal set in a dual structure. The master matching system of claim 1, wherein the dual matching board is configured to copy-split the downlink data cells connected to the switching port of the ATM switch via a first cable, and to merge upstream data cells. The dual system of ATM system comprising a slave matching system for analyzing and selecting downlink data cells connected to the master matching system through a second cable and transmitting and copying them, and transmitting the upstream data cells to the master matching system. Matching board expansion device. Connection setting information analysis step of analyzing the connection setting information by analyzing the connection setting information set from the control system board of the asynchronous ATM system, and when it is confirmed that the data currently processed after the connection setting information analyzing step is an uplink data cell, the master matching board Merge the data input from the slave matching board together with its own data to output to the switching port of the ATM switch and the data that is currently processed after the connection configuration information analysis step is confirmed that the downlink data cell In this case, a downlink data matching step of copying the data cells inputted by the master matching board to the slave matching board and selectively processing the data cells in each of the dual matching boards, and the uplink data matching step and the downlink data Connected by dual matching boards after the matching step The control method of the dual matching board expansion apparatus of the AMT system, characterized in that consisting of up, down data routing step of routing the data cells to the destination.