KR20040043497A - Apparatus and method for diagnosis of ATM data bus in DSLAM - Google Patents

Abstract

PURPOSE: An ATM control apparatus of a DSLM and its method are provided to improve service quality and stability of a system during ATM cell data transmission. CONSTITUTION: A network access part(310) is connected with a network equipment(500) through a transmission line section. An ATM processor(320) processes ATM by being connected to the network access part. A data processor(360) transmits/receives data to/from the ATM processor, and transmits/receives ATM up data and ATM down data to/from an ADSL subscriber board, and compares the ATM up data with the ATM down data if an ATM data bus diagnosis command is received from a controller(340), and reports the comparison result to the controller. The controller performs ATM control by being connected to the ATM processor, and informs an operator terminal whether an ATM data bus is normal or not. And a signal processor(350) performs signal processing by being connected to the data processor.

Description

DALM control device and method thereof of DSL {Apparatus and method for diagnosis of ATM data bus in DSLAM}

The present invention relates to an Asynchronous Transfer Mode (ATM) control apparatus and method for a Digital Subscriber Line Access Multiplexer (DSLAM), and more particularly, to an ATM data bus error diagnosis function. The present invention relates to an ATM control device and a method of a DSLAM, which are suitable for improving the quality of service and securing stability in a cell data transmission.

In general, DSLAM is a network equipment that is usually installed in a telephone company. It receives signals from digital subscriber line connections of multiple customers and uses multiplexing technology to send signals to high-speed backbone lines. In some products, DSLAM multiplexers connect DSL lines with a combination of ATM, frame relay, or Internet Protocol (IP) networks. DSLAM enables telephone companies to provide high-speed telephone line technology (Digital Subscriber Line (DSL)) and high-speed backbone network technology (ATM) to business and home users.

1 is a block diagram of a general DSLAM.

Here, reference numeral 100 denotes a subscriber terminal capable of accessing the DSLAM, 200 denotes a system motherboard of the DSLAM connected to the subscriber terminal 100, 300 denotes an ATM control device mounted on the system motherboard 200, and 400 denotes an ATM control. Asymmetric Digital Subscriber Line (ADSL) subscriber board connected to the board 300, 500 is a network equipment connected to the system motherboard 200 and the transmission path section (STM-1), 600 is ATM An operator terminal connected to the control device 300.

2 is a block diagram of a conventional ATM control apparatus.

As shown therein, the network connection unit 310 connected to the network equipment 500 through the transmission path section; An ATM processing unit 320 connected to the network connection unit 310 to process ATM; Transmit / receive data with the ATM processing unit 320, and transmit / receive the ADSL subscriber board 400, the ATM up data ATM_Up D [0:15}, and the ATM down data ATM_Down D [0:15}. A data processor 330; A control unit 340 connected to the ATM processing unit 320 to perform ATM control; Under the control of the control unit 340 is connected to the data processing unit 330 is configured to perform a signal processing unit 350.

3 is a detailed block diagram of the data processor of FIG. 2.

As shown, ATM cell loopback is performed by performing ATM reordering on the data received by the ATM processing unit 320 and transmitting the ATM down data (ATM_Down D [0:15}) to the ADSL subscriber board 400. A first ATM cell reordering unit 331 for performing; A second ATM cell rearrangement that receives ATM up data (ATM_Up D [0:15}) from which the ATM cell loopback is performed by the ADSL subscriber board 400 and performs rearrangement of the ATM cells to be transmitted to the ATM processor 320. Section 332.

The operation of the conventional apparatus configured as described above will be described in detail with reference to the accompanying drawings.

First, the data information generated in the subscriber terminal 100 of the ADSL is transmitted to the data processing unit 330 of the ATM control apparatus 300 through the ADSL subscriber board 400.

Then, the signal processor 350 receiving the control signals HAD [0: 7] and HA [0:12] of the controller 340 controls the data processor 330 to transmit ATM data to the ATM processor 320. do.

Under the control of the controller 340, ATM data of the ATM processing unit 320 is transmitted to the network connection unit 310, and STM-1 (Synchronous Transport Module level 1, synchronous transport), which is a transmission path section, from the network connection unit 310. Module 1, 155.52 Mbps).

In this case, the ATM data transmitted from the ADSL subscriber board 400 converts the ATM data of the 16-bit data bus into an 8-bit data bus in the data processing unit 330 of the ATM control apparatus 300.

In addition, the signal processor 350 controls the traffic of the ATM data from the ADSL subscriber board 400 to send the ATM data to the ATM processor 320.

In addition, the network connection unit 310 converts this ATM data into a synchronous STM-1 signal and transmits it to the network equipment 500 through the transmission path section.

The controller 340 of the ATM control apparatus 300 monitors the ATM processor 320 and the signal processor 350 using a communication data / address bus to monitor a cathode ray tube (CRT) of the operator terminal 600. To indicate.

However, such a conventional apparatus, the ATM control apparatus 300, the ADSL subscriber board 400, and the system motherboard 200 share an ATM data bus [ATM DATA BUS [0:15]) for transmitting and receiving ATM data. In this data bus system, if an error occurs in any one of the ATM data bus of the system motherboard 200 or the ADSL subscriber board 400, the entire system cannot operate normally.

Therefore, when such a problem occurs in the related art, since there is no method for diagnosing an ATM data bus, there is a disadvantage in that a lot of test time and measuring equipment are required to verify the verification of the system motherboard 200 and the cause of the error. .

Accordingly, the present invention has been proposed to solve the conventional problems as described above, an object of the present invention is to implement the error diagnosis function of the ATM data bus to improve the quality of service of the system in ATM cell data transmission and to ensure stability To provide a DSLAM ATM control device and method therefor.

In order to achieve the above object, the ATM control apparatus of the DSLAM according to an embodiment of the present invention,

A network connection unit connected to the network equipment through a transmission path section; An ATM processing unit connected to the network connection unit to process an ATM; Sending / receiving data with the ATM processing unit, sending / receiving ADSL subscriber board, ATM up data and ATM down data, and receiving ATM data bus diagnosis command from the controller, comparing the ATM up data with the ATM down data and comparing the result. A data processing unit for reporting to the control unit; A control unit connected to the ATM processing unit to perform ATM control, giving an ATM data bus diagnosis command to the data processing unit to report the result, and to inform the operator terminal whether the ATM data bus is normal; The technical configuration is characterized in that it comprises a signal processing unit for performing a signal processing connected to the data processing unit under the control of the controller.

ATM control method of the DSLAM according to an embodiment of the present invention to achieve the above object,

If there is an ATM data bus diagnostic instruction, generating a predetermined pattern of ATM cell data and looping back the ATM cell; And a second step of determining whether the ATM data bus is normal by comparing the ATM data sent down after the first step with the ATM data looped back up.

1 is a block diagram of a general DSLAM,

Figure 2 is a block diagram of a conventional ATM control device,

3 is a detailed block diagram of a data processor of FIG. 2;

Figure 4 is a block diagram of an ATM control device of the DSLAM according to the present invention,

5 is a detailed block diagram of a data processor of FIG. 4;

6 is a detailed block diagram of the comparison unit in FIG.

7 is a flowchart illustrating an ATM control method of a DSLAM according to the present invention.

Explanation of symbols on the main parts of the drawings

100: subscriber terminal 200: system motherboard

300: ATM control unit 310: network connection

320: ATM processing unit 330, 360: data processing unit

331, 361: first ATM cell reordering unit 332, 362: second ATM cell reordering unit

340 control unit 350 signal processing unit

363: comparison unit 363, 365, 366: exclusive logic device

400: ADSL subscriber board 500: network equipment

600: operator terminal

Hereinafter, an embodiment according to the present invention configured as described above, an ATM control apparatus of DSLAM, and a method thereof will be described in detail with reference to the accompanying drawings.

Figure 4 is a block diagram of an ATM control device of the DSLAM according to the present invention.

As shown therein, the network connection unit 310 connected to the network equipment 500 through the transmission path section; An ATM processing unit 320 connected to the network connection unit 310 to process ATM; Transmit / receive data with the ATM processing unit 320, and transmit / receive the ADSL subscriber board 400, the ATM up data ATM_Up D [0:15}, and the ATM down data ATM_Down D [0:15}. When the ATM data bus diagnosis command is received from the controller 340, the ATM up data ATM_UpD [0:15} is compared with the ATM down data ATM_Down D [0:15} and the comparison result is compared with the controller 340. A data processing unit 360 to report to; A control unit connected to the ATM processing unit 320 to perform ATM control, issue an ATM data bus diagnosis command to the data processing unit 360, report the result, and inform the operator terminal 600 whether the ATM data bus is normal. 340; Under the control of the control unit 340 is connected to the data processing unit 330 is configured to include a signal processing unit 350 for performing a signal processing.

FIG. 5 is a detailed block diagram of the data processor 360 of FIG. 4.

As shown, ATM cell loop is performed by reordering the ATM cells from the data received by the ATM processor 320 to transmit ATM down data ATM_Down D [0:15} to the ADSL subscriber board 400. A first ATM cell reordering unit 361 for performing a back; A second ATM cell rearrangement that receives ATM up data (ATM_Up D [0:15}) from which the ATM cell loopback is performed by the ADSL subscriber board 400 and performs rearrangement of the ATM cells to be transmitted to the ATM processor 320. Section 362; Compare the ATM cell data output from the first ATM cell reordering unit 361 with the looped ATM cell data input to the second ATM cell reordering unit 362 and transmit the result to the controller 340. It is comprised including the part 363 further.

FIG. 6 is a detailed block diagram of the comparison unit 361 in FIG. 5.

As shown in the drawing, the plurality of ATM cell data output from the first ATM cell reordering unit 361 and the plurality of looped ATM cell data input to the second ATM cell reordering unit 362 are respectively received and are exclusive. It consists of a plurality of exclusive logical sum elements 364 to 366 for performing OR.

7 is a flowchart illustrating an ATM control method of a DSLAM according to the present invention.

As shown in this figure, if there is an ATM data bus diagnosis command, a first step (ST11 to ST13) of generating ATM cell data of a predetermined pattern and looping back the ATM cell; And a second step (ST14 to ST17) of comparing the ATM data sent down after the first step with the ATM data that is looped back and determining whether the ATM data bus is normal.

In the second step ST14 to ST17, the compared ATM data (ATM_Down D [0:15]) and the looped-up ATM data (ATM_Up D [0:15]) are compared by an exclusive logical sum operation. Determining whether they are the same (ST14) (ST15); If the comparison value is the same, reporting to the operator terminal 600 that the state of the ATM data bus is in a normal state (ST16); If the comparison value is not the same, a step ST17 of reporting that the state of the ATM data bus is an error state to the operator terminal 600 is performed.

The operation of the ATM control device and method of the DSLAM according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, the present invention is to ensure the stability when transmitting ATM cell data by implementing the error diagnosis function of the ATM data bus.

Thus, the network connection unit 310 is connected to the network equipment 500 through the transmission path section, the ATM processing unit 320 is connected to the network connection unit 310 to process the ATM.

The control unit 340 is connected to the ATM processing unit 320 to perform ATM control, issue an ATM data bus diagnosis command to the data processing unit 360 and report the result to the operator terminal 600 to determine whether the ATM data bus is normal. Inform.

The signal processor 350 is connected to the data processor 330 under the control of the controller 340 to perform signal processing.

The data processor 360 transmits / receives data with the ATM processor 320, the ADSL subscriber board 400, the ATM up data ATM_Up D [0:15}, and the ATM down data ATM_Down D [0:15}. Send / receive) When the ATM data bus diagnosis command is received from the controller 340, the ATM up data ATM_Up D [0:15} is compared with the ATM down data ATM_Down D [0:15}, and the comparison result is transmitted to the controller 340. report.

In the data processing unit 360, the first ATM cell rearranging unit 361 performs the rearrangement of the ATM cells from the data received from the ATM processing unit 320, thereby transferring the ATM down data ATM_Down D [0:15} to the ADSL subscriber board. Send to 400 so that the ATM cell loop back is performed.

The second ATM cell reordering unit 362 receives the ATM up data (ATM_Up D [0:15}) from which the ATM cell loopback is performed from the ADSL subscriber board 400, and realigns the ATM cells to perform ATM reordering. To send).

The comparison unit 363 then loops back the ATM cell data (ATM_Down D [0:15}) output from the first ATM cell reordering unit 361 and the second ATM cell reordering unit 362. The ATM_Up D [0:15}) is compared and the result is transmitted to the controller 340 so that the operator can easily determine whether the ATM bus is normally operating through the operator terminal 600.

In this case, the comparator 363 may be configured of exclusive logic elements 364 to 366.

Referring to the operation of the present invention in more detail as follows.

First, the ATM data bus (ATM DATA BUS [0:15]) is exchanged between the ADSL subscriber board 400 and the ATM control device 300. If one of the ATM data buses fails, the entire system operates normally. You will not be able to. In addition, since there was no simple program for diagnosing a defective data bus, a lot of test time and instruments were required to identify or verify the cause of the defect.

Therefore, in the present invention, the ADSL subscriber board 400 and the ATM controller 300 are controlled by controlling the data processor 360 of the ATM controller 300 through serial communication (RS-232) of the ATM controller 300. By forming a certain ATM data pattern, the ATM data bus can be diagnosed by comparing the ATM data that is looped back from the ADSL subscriber board 400.

Accordingly, when the operator issues an ATM data bus diagnostic command to the ATM control device 300 through the operator terminal 600, the ATM control device 300 issues an ATM cell loop back command to the ADSL subscriber board 400. Get off.

The controller 340 sends the ATM cell data of a predetermined pattern to the data processor 360 to the ATM processor 320. As an example of a certain pattern, ATM cell data in which AA55 is binary 1010/1010/0101/0101 in hexadecimal is sent down to the data processing unit 360.

ATM cell data having a predetermined pattern such as 1010/1010/0101/0101 is transmitted to the ADSL subscriber board 400 through the ATM_Down [0:15] bus of the system motherboard 200, and the ADSL subscriber board 400 The looped back ATM cell data is returned to the data processor 360 of the ATM control apparatus 300 through the ATM_Up [0:15] bus.

In this case, the comparison unit 363 in the data processing unit 360 may determine which ATM data bus is abnormal by performing a comparison by an exclusive logical sum operation or the like. And the content of the abnormality is sent to the operator terminal 600 through the control unit 340, the operator can easily determine the abnormality of the ATM data bus.

Referring to the internal structure of the comparison unit 363 in EG 6, the ATM_Down [0:15] and the ADSL subscriber board (1) sent down from the first ATM cell rearranging unit 361 of the data processing unit 360 of the ATM control apparatus 300 are described. In operation 400, ATM_Up [0:15], which is looped back and input to the second ATM cell reordering unit 362, is compared one-to-one and outputs a value of 0 for the same data and a value of 1 for different data.

That is, when ATM data is sent to AA55, which is a hexadecimal number, ATM_Down [0:15] is sent to 1010/1010/0101/0101, and ATM_Up [0:15] looped back from the ADSL subscriber board 400 is also 1010 /. Returning to 1010/0101/0101, all the ATM_B [0:15] outputs of the 16 exclusive logic elements 364 to 366 in the comparator 363 will be all zero values.

If there is an abnormality in ATM_Down [0] of the system motherboard 200 and is always bound to a value of 0, when ATM_Down [0] sent down from the data processing unit 360 of the ATM control apparatus 300 has a value of 1, The output of the comparator 363 has a value of 1. The contents are reported to the operator terminal 600 through the control unit 340 to determine that the operator has an abnormality in ATM_Down [0].

As such, the present invention implements the error diagnosis function of the ATM data bus to improve the service quality of the system in ATM cell data transmission and ensure stability.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the DSLAM ATM control apparatus and method thereof according to the present invention can perform a test on the ATM data bus of the system motherboard and the ADSL subscriber board through a simple command, thereby reducing the test time and the test method. The effect becomes simple.

In addition, the present invention improves the quality of the system and secures the stability of service by enabling the system to determine the cause of the error and to respond quickly when there is an error in a specific ATM data bus of the system motherboard and the ADSL subscriber board. Will also be.

Claims (5)

A network connection unit connected to the network equipment through a transmission path section; An ATM processing unit connected to the network connection unit to process an ATM; Sending / receiving data with the ATM processing unit, sending / receiving ADSL subscriber board, ATM up data and ATM down data, and receiving ATM data bus diagnosis command from the controller, comparing the ATM up data with the ATM down data and comparing the result. A data processing unit for reporting to the control unit; A control unit connected to the ATM processing unit to perform ATM control, to issue an ATM data bus diagnosis command to the data processing unit to report the result, and to inform the operator terminal whether the ATM data bus is normal; And a signal processing unit connected to the data processing unit to perform signal processing under the control of the control unit. The method of claim 1, wherein the data processing unit, A first ATM cell rearrangement unit performing rearrangement of ATM cells on the data received by the ATM processing unit to transmit ATM down data to the ADSL subscriber board to perform ATM cell loop back; A second ATM cell rearranging unit configured to receive ATM up data from which the ATM cell loopback has been performed by the ADSL subscriber board, perform rearrangement of the ATM cells, and transmit the rearranged ATM cells to the ATM processing unit; And a comparator for comparing the ATM cell data output from the first ATM cell reordering unit and the looped ATM cell data input to the second ATM cell reordering unit and transmitting the result to the controller. ATM controller. The method of claim 2, wherein the comparison unit, And a plurality of exclusive logical sum elements configured to receive an exclusive logical sum operation by receiving a plurality of ATM cell data output from the first ATM cell reordering unit and a plurality of loop back ATM cell data input to the second ATM cell reordering unit. DSLAM's ATM controller. If there is an ATM data bus diagnostic instruction, generating a predetermined pattern of ATM cell data and looping back the ATM cell; And a second step of determining whether the ATM data bus is normal by comparing the ATM data sent down after the first step with the looped-up ATM data. The method of claim 4, wherein the second step, Comparing the downed ATM data with the looped up ATM data by means of an exclusive logical sum operation to determine whether the comparison values are the same; If the comparison value is the same, reporting to the operator terminal that the state of the ATM data bus is normal; And if the comparison value is not the same, reporting the state of the ATM data bus to the operator terminal as an error state.