KR0161125B1 - Apparatus for detecting bad message in the switching system and method - Google Patents

Abstract

The present invention is to provide an apparatus and method for detecting a damaged message before the transfer from the disk to the magnetic tape when processing to record the message generated for each subscriber by using the disk and the magnetic tape in the electronic switchboard When the device according to the present invention receives a message transmitted in a predetermined unit from each message generating device, when the message is stored in a container until a predetermined amount is reached for each type, the checksum value of the message stored at the end of the predetermined amount is included. When the amount of data stored on the disk is stored as much as the amount of data that can be transferred to the magnetic tape at once, it controls whether the message is read from the disk equal to the fixed amount set in the container. A control unit for controlling the detection; When a predetermined amount of messages are read from the disk by the control unit, a checksum value of the messages except for the checksum value included in the read message is calculated, and the result of comparing the calculated checksum value with the read checksum value is transferred to the control unit. A checksum calculation and comparison unit for determining whether there is corruption in a message currently read by transmitting; And a terminal capable of outputting information related to a message damaged by a signal transmitted from the control unit. Therefore, the damaged message can be prevented from being recorded on the magnetic tape as it is, and if the damaged message is present, the operator can be notified of the details of the damaged message and prompt action can be taken.

Description

Damaged Message Detection Apparatus and Method in Electronic Switching System

1 is a block diagram of a message generating device and a message containing processing device provided in a conventional all-electronic exchange.

2 is a block diagram of an electronic switch having a damaged message detection apparatus according to the present invention.

3a, b are flowcharts of a method for detecting a corrupted message according to the present invention.

* Explanation of symbols for main parts of the drawings

100a to 100n: message generating device 200: message recording processing device

201: control unit 202: container

203: memory queue 204: disk

206: magnetic tape (MT) 205: checksum value calculation and comparison unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to maintaining the reliability of messages in electronic switchboards, and more particularly, to a damaged message detection device and method capable of detecting a damaged message while a generated message is stored in a hard disk, which is an auxiliary memory device.

In the conventional electrical switchboard, the message generators 101a through 101n and the message collectors 102a through 1 as shown in FIG. 1 are used to store messages generated per subscriber (for example, billing messages). 102n) is assigned to each of the message generating apparatuses 100a to 100n per subscriber, and each time a message generated from each subscriber is collected by a certain amount to the corresponding message generating apparatuses 100a to 100n, the collected messages are stored. 120).

The message recording processing device 120 is composed of a control unit 121, a container 122, a memory queue 123, a disk 124, and a magnetic tape 125 (hereinafter referred to as MT). 100 n) is recorded for each message transmitted in a predetermined unit. That is, when a message of a predetermined unit is transmitted from the n message generating apparatuses 100a to 100n, the message is transmitted to the control unit 121. The control unit 121 classifies the messages transmitted from the message generating apparatuses 100a to 100n by type and transmits them to the container 122. The container 122 stores a predetermined amount (for example, 1K byte) for each message type, and transmits a message recorded for the predetermined amount to the memory queue 123. The memory queue 123 temporarily stores a certain amount of data transmitted from the container 122, and then stores a message stored in the disk 124 when the disk 124 performs no operation (or when idle). 124) to be stored. The disk 124 transmits the recorded data controlled by the control unit 121 to the MT 125 when the recorded message reaches an amount that can be transmitted to the MT 125 at one time. Such message recording processing is collectively controlled by the control unit 121. The MT 125 containing the message is hermetically removed from the electronic exchanger and transferred to the oxygen storage for analysis.

However, the existing electronic switch does not perform any verification on the stored messages until the collected messages are recorded on the MT 125, and the system is unstable while the messages are stored on the disk 124. In case of damage, the damaged message is stored in the MT 125 as it is, and transferred to the computer, which does not analyze the damaged message existing in the MT 125 at all.

Accordingly, an object of the present invention is to provide a damaged message detecting apparatus and method for detecting whether a message recorded on a disk is recorded on a magnetic tape and reporting it to an operator.

In order to achieve the above object, the apparatus according to the present invention, when a message is transmitted in a first predetermined unit from the message generating apparatus allocated per subscriber in the electronic switchboard, and stores a predetermined amount of messages on the disk through the memory queue, A message recording processing device configured to read a message stored in a second predetermined unit and to record on a magnetic tape, the message recording processing device comprising: a container configured to store a predetermined amount for each message type and store the predetermined amount for a message to a memory queue; In order to store the checksum value of the message included in the predetermined quantity at the end of the predetermined quantity, it is stored in the container for the message transmitted from any message generating device to the first predetermined unit so that it can be stored together. A control unit for controlling whether a message on the disk is damaged before being transmitted to the magnetic tape; Controlled by the control unit, the message stored in the disk is read in the same unit as the predetermined amount, the checksum value of the messages except the checksum value is read out, the calculated checksum value and the checksum value contained in the read message A checksum value calculation and comparison unit which transmits a result of comparing the same to the control unit so that the control unit can detect whether a message read from the disk is damaged or not; And a terminal for displaying the details of the damaged message transmitted from the control unit in a form known to the operator as the damaged message is detected.

In order to achieve the above object, the method according to the present invention, in the message recording processing device configured to record a message transmitted to the first predetermined unit from the message generating device allocated per subscriber in the electronic switchboard via a disk on a magnetic tape, A first storing step of storing, when the message is transmitted from the message generating device in a first predetermined unit, until the second predetermined amount is reached for each message type; A first checksum value calculating step of calculating checksum values of all messages stored in the first storing step; A second storing step of storing the checksum value so that the checksum value calculated in the first checksum value calculating step is stored at the end of the message stored in the first storing step; A first recording step of recording the checksum value and the second predetermined amount of messages stored in the second storage step on the disk when the disk is idle; A first repeating step of repeating the first recording step from the first storage step if the amount of messages recorded on the disk does not reach an amount that can be transmitted at once with the magnetic tape; A first reading step of reading data from the disc in units equal to the units recorded in the first recording step when the amount of messages recorded on the disc reaches the amount that can be transmitted at once with the magnetic tape; A second checksum value calculating step of calculating a checksum value of the message except for the message corresponding to the checksum value among the read messages; Comparing the checksum value calculated in the second checksum value calculating step with the checksum value included in the read message; As a result of performing the comparison step, if the checksum value included in the read message and the second checksum value calculated in the second checksum value calculation step are different from each other, the read message is recognized as damaged and informs the history information and the damage of the read message. Outputting a message; As a result of performing the comparing step, if the checksum value and the second checksum value included in the read message are the same, the read message is recognized as intact and the second message is returned to the first read step to read the message from the disk. Reading step; Performing a second repetition step of repeating the first read step to the second read step until all the messages that can be transmitted from the disc to the magnetic tape are checked for damage; If it is determined that the damage does not exist in all the messages that can be transmitted at one time through the second repetition step, transmitting all messages that have been checked for damage from the disk to the magnetic tape. Characterized in that it is carried out.

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

2 is a block diagram of an electronic switch having a damaged message detecting apparatus according to the present invention, which is fixed from the message generating apparatuses 100a to 100n and the message generating apparatuses 100a to 100n serving as in FIG. The message containing processing device 200 for carrying out the recording process while detecting the damage to the message transmitted in units, and the terminal 210 for displaying the message output from the message containing processing device 200.

In particular, the message recording processing device 200, if the message is transmitted from the n number of generating devices (100a to 100n) in a predetermined unit, respectively, as shown in FIG. According to the present invention, the control unit 201 controls to detect whether the message contained in the disk 204 is damaged or not, and the container 202 stores a predetermined amount of messages transmitted by the control unit 201 for each type. A memory queue 203 for temporarily storing data output from the container 202, a disk 204 that is controlled by the control unit 201 and stores a message transmitted from the memory queue 203 and outputs the recorded message, The checksum value is read from the disk 204 by the same amount as the predetermined amount in the container 202, and the result of comparing the checksum value with the previously stored checksum value is transferred to the controller 201. Which consists of a checksum calculation and comparison unit (205), MT (206) for recording a message transmitted from the disk 204. The

3a and b are flowcharts illustrating a method for detecting a corrupted message according to the present invention.

Next, the operation of the embodiment according to the present invention will be described with reference to FIGS. 2 and 3. Hereinafter, the operation will be limited to the case where one type of message is recorded for convenience of description.

First, when a message of a predetermined unit is applied from the message generating apparatuses 100a to 100n allocated to each subscriber, the message storing processing apparatus 200 transmits to the control unit 201. The controller 201 sets the variables i, j, k to 0 in step 301, and when a message is received from any message generating apparatus 100 in step 302, the controller 201 proceeds to step 303 to determine the value of the variable i. Increase by 1. The flow proceeds to step 304 and compares the increased i value with the maximum value M of the amount of data that can be stored in the container 202 for each type. For example, in the case where the amount of data that can be stored in the container 202 for each kind is 1K bytes, the above-mentioned maximum value M is 1020 bytes minus 4 bytes of the last stage (1024-4).

As a result of the comparison in step 304, if the increased i value is less than M, the controller 201 proceeds to step 305 and stores the received message in the corresponding area of the container 202, and then proceeds to step 302. Receive the next message of its kind. However, if the increased i value is greater than or equal to M (i≥M) as a result of the comparison in step 304, the control unit 201 proceeds to step 306, sets i to 0, and then proceeds to step 307. The checksum value is calculated by reading the message of M amount contained in the). In step 308, the checksum value is stored in the container 202 so that the calculated checksum value can be loaded in the 4-byte area of the final stage where the message of M amount is stored. For example, when M is 1020 bytes, the control unit 201 transmits the calculated checksum value to the container 202 so that the checksum value calculated for the 1020 byte corresponding to the 1021 byte to 1024 byte area is stored.

In operation 309, a predetermined amount of messages (M bytes + 4 bytes) containing a checksum value at the final stage is read from the container 202 and stored in the memory queue 203. If the disk 204 does not perform any operation (or is idle), the controller 201 records a message stored in the memory queue 203 on the disk 204. In step 311, j is increased by one.

The controller 201 proceeds to step 312 and compares the increased j value with the maximum value N that can be stored in the MT 206 once. If the increased j is smaller than N, the controller proceeds to step 302. The above process is repeated. However, if the increased j is greater than or equal to N (j≥N), the control unit 201 proceeds to step 313 to store messages stored in the disk 204 for each type in the container 122. The checksum value is calculated and compared to the maximum storage capacity and transmitted to the comparison unit 205. In operation 314, the checksum value calculating and comparing unit 205 is controlled to calculate a checksum value for the message read from the disk 204. That is, when the read message is 1K bytes as in the above example, up to 1020 bytes correspond to the actual message, so the checksum value calculating and comparing unit 205 calculates the checksum value for the message read from the disk 204 up to 1020 bytes. Calculate The calculated value is compared with a corresponding checksum value contained between 1021 bytes and 1024 bytes, and the comparison result is transmitted to the controller 201.

The control unit 201 calculates a checksum value and compares the checksum value calculated from the comparison unit 205 with the checksum value previously stored and the checksum value stored in advance. The message is recognized as damaged, and the flow proceeds to step 317. In step 317, the controller 201 determines whether the 1K byte message recognized as being damaged is generated within 24 hours in consideration of the time when the previously damaged message is generated and the time when the currently damaged message is generated. This is to determine whether a corrupted message frequently occurs.

As a result of the determination in step 317, if it is determined that the error has occurred within 24 hours, the control unit 201 proceeds to step 318 and generates an alarm through the terminal 210 and at the same time the position of the disk 204 where the damaged message is stored, the disk ( The checksum value stored in step 204 and the checksum value calculated for 1020 bytes are output, and the flow proceeds to step 319 to store the time at which the corrupted message occurred.

The control unit 201 proceeds to step 320 and increases the variable K value by one, and proceeds to step 321 to compare the increased K value with the N value used in step 312 described above. As a result of the comparison, if the increased K value is less than N, the message in which the checksum value is not checked among the message amounts that can be stored once in the MT 206 in the disk 204 is still present. The check value checking process in units of 1K bytes described above is repeatedly performed.

However, as a result of the comparison in step 321, if the increased K is greater than or equal to N (K≥N), the checksum value for all messages that can be stored once in the MT 206 in the disk 204 is checked. Upon recognizing, the control unit 201 proceeds to step 322 to control the message stored in the disk 204 to be stored in the MT 206 and then returns to step 301 to initialize the i, j, and k values.

On the other hand, as a result of checking in steps 316 and 317, if the damage of the corresponding message of 1K bytes does not occur within 24 hours, the control unit 201 proceeds to step 323 and receives a fault message through the terminal 201. Outputs the message, the location of the message stored in the disk 204, the checksum value stored in the disk 204 and the checksum value calculated by calculating 1020 bytes, and then proceeds to step 319 as described above to store the generated time. The process proceeds to step 320 and is processed as described above.

In addition, if the checksum value calculated as a result of the comparison in step 316 and the checksum value stored in advance are the same, the corresponding 1K byte message read from the disk 204 is not damaged. The operation proceeds as described above.

As described above, according to the present invention, when a message generated for each subscriber in the electronic switchboard is recorded on the magnetic tape, the message stored on the disk before being recorded from the disk to the magnetic tape is checked using a checksum comparison method. It is advantageous to verify and to notify the operator of the details of the damaged message if it is determined to be damaged, so that the operator can take prompt action, and prevent the damaged message from being recorded on the magnetic tape as it is. In addition, there is an effect that can inform the operator of the frequency of occurrence of a damaged message based on time.

Claims (4)

When a message is transmitted in a first predetermined unit from a message generator allocated per subscriber in an electronic switchboard, a predetermined amount of messages are stored in a disk through a memory queue, and the message stored in the disk is read in a second predetermined unit in a magnetic manner. A message containing processing apparatus configured to record on a tape, comprising: a container configured to store the predetermined amount for each message type, and to transmit the stored message to the memory queue; To control the storage of the message transmitted from any message generating device to the first predetermined unit to the container so that the checksum value of the message included in the predetermined amount is stored together at the end of the predetermined amount. And a controller configured to detect whether a message recorded on the disk is damaged before the message recorded on the disk is transmitted to the magnetic tape. The message stored in the disk is controlled by the control unit in the same unit as the predetermined amount, the checksum value of the messages except the checksum value is read out, and the checksum value and the read message are included in the calculated message. A checksum calculation and comparison unit which transmits a result of comparing whether the checksum values are the same to the controller so that the controller can detect whether a message read from the disk is damaged or not; And a terminal for displaying details of the damaged message transmitted from the control unit in a form known to an operator as a damaged message is detected. The method of claim 1, wherein when the control unit detects that the message currently read from the disk is damaged by the checksum value calculation and the comparison result transmitted from the comparing unit, the time when the previously damaged message is generated and the currently damaged message is generated. And a control signal corresponding to the terminal so as to generate an alarm signal through the terminal when the frequency of occurrence of a damaged message is high with reference to a specified time. A message recording processing device configured to record, on a magnetic tape, a message transmitted in a first predetermined unit from a message generator allocated per subscriber at an electronic switching system, wherein the message is sent from the message generating apparatus to the first predetermined unit. A first storing step of, if transmitted, storing each message type until reaching a second predetermined amount; A first checksum value calculating step of calculating checksum values of all messages stored in the first storing step; A second storing step of storing the checksum value so that the checksum value calculated in the first checksum value calculating step can be stored at the end of the message stored in the first storing step; A first recording step of recording the checksum value and the second predetermined amount of messages stored in the second storage step on a disc when the disc is idle; A first repeating step of repeating the first recording step from the first storage step if the amount of messages recorded on the disk does not reach an amount that can be transmitted to the magnetic tape at once; A first reading step of reading data from the disc in the same units as the units recorded in the first recording step when the amount of messages recorded on the disc reaches the amount that can be transmitted to the magnetic tape at once; A second checksum value calculating step of calculating a checksum value for a message excluding a message corresponding to a checksum value among the read messages; Comparing the checksum value calculated in the second checksum value calculating step with a checksum value included in the read message; As a result of performing the comparing step, if the checksum value included in the read message and the second checksum value calculated in the second checksum value calculation step are different, the read message is recognized as damaged and the detail information of the read message is determined. Outputting a message informing of damage; As a result of performing the comparing step, if the checksum value and the second checksum value included in the read message are the same, the read message is recognized as intact and returned to the first read step to return a message from the disc. A second reading step of reading out; A second repeating step of repeating the first reading step and the second reading step until all the messages that can be transmitted from the disk to the magnetic tape are checked for damage; If it is determined that there is no damage in all the messages that can be transmitted at one time through the second repeating step, all messages whose damage has been checked are transmitted from the disc to the magnetic tape. And a damage message detection method according to claim 1, wherein the damage exchange is performed. The method of claim 3, wherein the outputting step is performed by referring to the time at which the previously damaged message was generated and the time at which the currently damaged message was generated when the second checksum value and the read checksum value were different in the comparing step. Checking the frequency of occurrence and generating an alarm signal if it is determined that a damaged message is frequently generated; And after the alarm signal generation step, storing the time at which the currently damaged message is generated.