KR950010559B1 - Method for detecting the disorder location of a remote information treating system - Google Patents

Abstract

The method for sensing the defect position at the communication error of a remote information processing system comprises the steps of setting a remote mode and writing subscriber line data; checking if there is any data input from the communication unit of the system and judging the state of the subscriber line at the communication fail; if the state of the subscriber line is normal, judging that there is a defect at the subscriber terminal connected to the subscriber line; if the state of the subscriber line is abnormal, reading data from a tester and comparing it with the written data; and if the data from the tester is identical to the written data, judging that there is a defect at a line concentration adapter.

Description

Abnormal position detection method of remote information processing system

1 is a system block diagram according to the prior art.

2 is a system block diagram between a scanner and a line concentrator applied to the present invention.

3 is a control flowchart of abnormal position detection according to an embodiment of the present invention.

The present invention relates to a remote information processing system, and more particularly, to a method for detecting an abnormal position in a communication error of a system having a patent main distribution frame access method.

Typically, a remote information processing system is a system that remotely collects information from subscriber premises equipment connected via an aerial line to perform necessary processing. Such a system collects the information by accessing a main distribution board of a general switch that has multiple access to subscriber lines, which is commonly referred to as a main distribution board access method.

Errors in communication in the remote information system are caused by various factors. Representative of these factors are disconnection of track, abnormality of track concentrator, and abnormality of track concentrator controller.

The conventional system configured as shown in FIG. 1 cannot detect at which position an error occurred in the case of communication error, so that the related element is newly changed or the line is disconnected. In FIG. 1, the microcomputer 101, the line concentration adapter controller 102, and the communication unit 103 form a scanner. The line concentrator 104 connected to the line concentrator control unit 102 concentrates a plurality of lines 112. The general telephone communication is performed through the telephone 107 and the exchanger 105 connected to the line 112, and the communication of the remote information is performed through the user terminal 106 and the microcomputer 101. The microcomputer 101 communicates with a host computer (not shown) to collect remote information and applies a control signal to the line concentrator controller 102 to access the line 112 of the subscriber to be collected. Accordingly, the controller 102 controls the line concentrator 104 so that the information of the subscriber line 112 is applied to the microcomputer 101 through the communication unit 103. In such a system, if the line 112 is broken, the collection of information becomes impossible. In addition, when an error occurs in the line concentrator control unit 102 or the line concentrator 104, communication of the information is interrupted. It is very important to detect the location where a failure occurs in the event of such a communication error. However, in the conventional system such as the first diagram, the microcomputer 101 did not know the position where the abnormality occurred.

Accordingly, it is an object of the present invention to provide a method for easily detecting disconnection of an element or a line in which an error occurs during communication error.

Another object of the present invention is to provide a method for identifying the cause of an error when an error in communication with remote information.

According to the present invention for achieving the above objects, the step of specifying the remote mode and the data specifying the subscriber line, and checking the presence of incoming data from the communication unit to determine the state of the subscriber line in the event of communication failure And recognizing that an abnormality of a subscriber station connected to the subscriber line is abnormal when the state of the subscriber line is normal in the determining step, and reading data by reading data from a tester when the state of the subscriber line is abnormal in the determining step. The step of comparing with the data and the step of recognizing abnormality of the line concentrator if the data do not coincide with each other in the comparing step are provided at least in a manner. Each of the above steps will allow the operator of the system to know the location of the fault and take immediate action.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, specific details will be set forth in order to provide a more complete understanding of the present invention. For those skilled in the art, the above description will be apparent and will be fully practiced without these details. In addition, well-known circuits and their functions are descriptive in order not to obscure the present invention.

First, Figure 2 shows a hardware block diagram of a system applied to the present invention. The scanner 200 includes a microcomputer 201, a first line concentrator control unit 202, a first tester 203, a first buffer 204, a second line concentrator control unit 205, and a second tester 206. , A second buffer 207, a line detector 223, and a communication unit 208. Blocks other than the scanner 200 of FIG. 2 have the same functions and configurations as those of the first diagram described above. The microcomputer 201 included in the scanner 200 may further include a diagnostic function as shown in FIG. 3 to be implemented in the present invention as well as a function of the conventional remote information processing. It must be understood. That is, the microcomputer 201 embeds a memory such as a ROM that has programmed the algorithm of FIG. 3 as a programming language, and executes it sequentially to diagnose an abnormal part when communication fails. The detailed list of programs will be solved by working with conventional C-language. The microcomputer 201 is connected to internal elements of the scanner 200 and a data line, and provides mode control signals M1, M2, and M3 to the first and second buffers 204 and 207. The mode control signal M3 is a signal having a high or low shape, and thus the local mode of the remote mode is determined. In the local mode, a path is formed through the first to second line concentrator controllers 205 without data of the data line going to the data line 216 of the line concentrator 104. That is, the diagnostic mode in the scanner 200 itself. The remote mode refers to a mode in which passages are formed in the data lines 216 and 217 of the line concentrator 104. That is, if one of the data lines 216 and 217 is a transmission line according to the states of the signals M1 and M2, the other becomes a receiving line.

The microcomputer 201 of FIG. 2 performs the control flow of FIG. 3, which will be described. In operation 300, the microcomputer 201 sets the control signal M3 to the remote mode, the M1 to the write mode, the M2 to the read mode, and writes the subscriber line data to the data line. In other words, the subscriber line data is an address signal specifying the subscriber line. Accordingly, the data line 216 connected through the first buffer 204 becomes a transmission line, and the data line 217 becomes a receiving line. The data on the receiving line becomes response data indicating that the line concentrator 104 has accessed the corresponding subscriber line in response to the data of the transmission line. The received data is provided to the data line of the microcomputer 201 through the second buffer 207. Therefore, the microcomputer 201 attempts to communicate with the line concentrator 104 through the communication unit 208. This corresponds to step 302 of FIG. After performing step 302, it is checked whether the communication is successful in step 304. If communication is successful in step 304, since the state of the corresponding subscriber line, the user terminal, and each block are all normal, step 306 is performed. In step 306, data for accessing a new subscriber line is written and returned to step 302. However, if communication fails in step 302, step 308 is performed. Step 308 is a step of determining a state of a corresponding subscriber line when communication fails. Execution of the step is performed through the line detector 223 of FIG. The line detector 223 detects the voltage of the accessed telephone line and outputs a high or low signal. If it is determined in step 308 that the subscriber line is not disconnected, the microcomputer 201 determines that the user terminal of step 310 is abnormal.

This is because the user terminal 106 must be faulty if the status of the subscriber line is normal when communication fails in the remote mode. If the state of the pressurizer line is not normal in operation 308, data is read through the second tester 206 in operation 312. If the read data and the written data are matched in step 314 and match, the line concentrator 104 or more in step 316 is recognized and the process returns to step 3000. In this case, it is preferable to allow the operator to know the abnormality by displaying through a monitor. If the data does not coincide with each other in step 314, step 318 is performed. The operations from step 3000 to step 314 were described when the data line 216 is a transmission line and the data line 217 is a reception line in the remote mode.

In step 318, the microcomputer 201 sets the control signal M3 to the remote mode, the M1 to the read mode, the M2 to the write mode, and writes the subscriber line data to the data line. Accordingly, the data line 216 connected through the first buffer 204 becomes a receiving line, and the data line 217 becomes a transmission line. From step 318 to step 334, the transmission line and the reception line are opposite, but the operations performed by the microcomputer 201 are very similar. The step 324 is a step of recognizing an abnormality of the subscriber line or the first line concentrator control unit 104 and the step 328 is a step of recognizing an abnormality of the user terminal 106, the subscriber line, or the line concentrator control unit. . In addition, step 334 is a step of recognizing that the line concentrator 104 or the line concentrator controller is abnormal. If the data of the read writes do not coincide with each other in step 332, step 336 is performed.

Steps 336 to 350 are steps of detecting an abnormal position in the local mode. In this case, the control signal M3 is set to the local mode, the M1 is set to the read or write mode, and the M2 is set to the write or read mode, and the subscriber line data is written to the data line. That is, in the local mode, an abnormality of the first line concentrator control unit 202 of step 342 and an abnormality of the second line concentrator control unit 205 of step 348 are detected. The abnormality of the group 104 can be seen. Accordingly, the operator of the system can know the location of the abnormality has a convenient advantage in the operation and maintenance of the system.

As described above, according to the present invention, there is an advantage in that the fixed portion occurring in the remote information processing system can be easily known.

As described above, the present invention has been illustrated according to the drawings and described in accordance with the embodiments, but the present invention is not limited thereto, and various changes and modifications can be made without departing from the basic definition of the present invention. Anyone with ordinary knowledge will know it clearly. For example, it will be appreciated that each step of the algorithm can be implemented by extending or modifying it as necessary.

Claims (2)

A method for detecting a location of an abnormal occurrence in a communication error of a remote information processing system, the method comprising: specifying a remote mode and writing data specifying a subscriber line; and checking whether there is data coming from the communication unit of the system and communicating Determining the state of the subscriber line upon failure of; and recognizing that the state of the subscriber line connected to the subscriber line is abnormal when the state of the subscriber line is normal in the determination step; And if it is abnormal, reading data from a tester and comparing the data with the written data, and recognizing an abnormality of the line concentrator if the data coincide with each other in the comparing step. 2. The method of claim 1, wherein determining the subscriber line is performed by checking a sensing output of a tester that senses the voltage of the subscriber's telephone line.