JPS6267951A - Communication circuit fault generating device - Google Patents

Abstract

PURPOSE:To make it possible to produce reproducible communication circuit faults in actual working state by specifying the position of superposition of noise signals according to conditions of occurrence of a fault, and at the same time, specifying the waveform and length of the noise signals according to information of noise generation. CONSTITUTION:In transmitting side, pulse signals of on-time 5 millisecond, off-time 20 millisecond and period 25 millisecond are superposed for 5 cycle minute from 15-th byte of transmitted text data from a terminal as noise signals. When the 15-th byte of the transmitted text data is inputted to a processing section 46S, a fault occurrence condition judging section 38S makes a condition effectuation signal Ss on state. A control section 34 starts a fault data generating section 42 responding to on of the condition effectuation signal SS, and produce noise signals. The noise signals are inputted to the processing section 46S through a register 44S. In this way, fault of communication circuit due to superposition of noise signals can be produced. The position of superposition of noise signals is specified according to conditions of occurrence of fault, and the waveform and length of the noise signals are specified by information of noise generation.

Description

[Detailed Description of the Invention] [Field of Application of f(: Industry 1)] This invention is directed to the occurrence of a communication line failure that causes a communication line failure between a data processing system and a terminal head 16. Related to equipment.

[Conventional technology] When testing the ability of software to withstand communication line failures in data processing systems, the following two methods are adopted depending on the person.

The first JJ method is a method of simulating a communication line failure using program 1 in a data processing system.

The second method is to connect a random noise generator to a communication line and superimpose random noise on the communication line during actual operation to cause a communication line failure.

[Problem to be solved] +Iif The first method does not use the actual communication lines, so it is difficult to grasp the ability to handle communication line failures in one minute during actual operation. It is difficult to understand.

In the second method, the failure light/1(l) of the 11 lines is
Since the ll+ time is completely indeterminate and its 11F frequency is not present, it is not possible to test the ability for a -7 four-line fault in one minute. Furthermore, since it is difficult to measure and analyze communication J1 line failures due to noise ossicles, it is difficult to take countermeasures when failures cannot be dealt with.

[I] An object of the present invention is to solve the conventional problems related to testing the communication line failure capability of data processing/systems.
It is an object of the present invention to provide a communication line failure optical system which generates a certain communication line failure in the actual operating state of a data processing system that is connected through one line.

[Second step to solve the problem] In order to achieve this object, the present invention provides a terminal device connected to the lever, data processing/system via 18 lines, and its model l, A communication line fault generating device that performs a predetermined fault detection Article 11 e1 determination regarding data or control information exchanged between the data processing system and the terminal device. (11) a determination stage, and a holding means for holding the failure occurrence condition tl'+;
means for retaining noise 11 information; and when the formation of the 1111 failure occurrence 11 condition is determined by the determination stage 1111, the waveform and length specified by the noise generation information are converted into noise. a generating means for generating il'+;
A communication line failure generating device comprising: 1) means for reducing the noise signal generated by the 11th/1st F stage to the data or control information exchanged with the data processing system terminal device; is provided.

The noise signal) is, for example, a pulse signal having a waveform and cycle number specified by the noise generation information.

[In such a configuration, the noise (i'j "J's city Y
The t position is specified by the obstacle measure 11 e1, and is converted into noise.
] The waveform length of 1. 'I is determined, so that one line failure can be treated as a light 11 in the actual operation state, regardless of the occurrence of the occurrence.

Furthermore, depending on the failure occurrence conditions, various communication and single line failures can occur.

Therefore, it becomes possible to test and analyze in detail and reliably the ability of the actual data processing/system to deal with various communication line failures in the actual operating state where the line is actually connected.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram of a 7-step system for reducing the connection state of a communication line fault generating/1 device according to the present invention.

In this figure, 10 is a data processing system (for example, a central 1F 19 machine system), 12 is a terminal device, and 14 is a communication system (for example, a central 1F 19 machine system).
, i-line, 16 is the data processing/modem on the stem 10 side (
18 is a modem on the terminal device 12 side.

The communication (188 line failure 11 device 2o) according to the present invention is inserted between the model j, 18 and the terminal device 12, and is connected between the data processing system 10 and the terminal device 12 via the communication 1-1 line 14. The data and control information exchanged are always passed through the communication line failure generating device 20.

This communication line fault generating device 20 is equipped with a -F stage that satisfies a preset fault occurrence condition f11 regarding data or control information exchanged between the data processing system IO and the terminal device 12, In the actual operation state of the data processing system 10, when the failure occurrence conditions described in 1-1 are fulfilled, the control is performed by performing the set operation on the exchanged data or control information, and therefore the reproduction v1 This can cause certain communication line failures.

Manipulations to prevent such communication line failures include: ■ Inserting preset data into the exchanged data or control information; ■ Inserting preset data into the exchanged data or control information. ■Extend the exchange data or control information for the 115 minutes set by Y.
■There are four types: r/me setting for sending/receiving data or control information to make dirty noise %j. In other words, four types of 13 line failures can occur corresponding to these operations f1.

In addition to the mode in which the communication H line fault generation device 20 generates such a 1° line fault, it also operates in a through mode in which the exchange data and control information are passed through as is.

When testing the communication line failure capability of the data processing system 10, the communication line failure generation device 20 is set to the communication line failure generation mode, and information for generating a communication line failure as described in 1. Set it. Then, in the actual operating state, the communication line failure generating device 20 is caused to generate a communication line failure as described in 1° above, and the ability of the data processing apparatus 10 to deal with the 11 line failure can be tested and analyzed.

FIG. 1 is a small diagram showing an example of the 41F line failure/1 device 20. In this figure, R1) is 1; ! Switch circuits 32R and 32S are provided, respectively.

In the case of through mode, changeover switch circuits 32R, 32S
is set to the side shown in the figure by the control unit 34, and the transmitted/received data or control information is substantially transmitted to the communication line failure generating device 20.
I am allowed to pass by. In case of communication line failure mode,
The control unit 34 controls the 173 switch circuits 32R and 32.
8 is switched to the opposite side.

Here, the changeover switch circuits 32R and 328 are respectively controlled to switch to γ. In other words, the operation mode can be set to Nγ for each of the receiving side and the transmitting side.

As elements directly related to the communication line failure mode, the receiving side includes a buffer register 38R1, a failure light generation condition determination unit 38R1, registers 4OR, 44R, and a processing unit 46R.
There is. Similarly, on the transmitting side, there is a buffer rrestor 36S.
1 failure occurrence condition C1° pHi part 38S1/meta 40S,
44S and a processing section 46S. Further, there is a failure data/1 generation unit 42 common to the receiving side and the transmitting side. Each of these elements works in conjunction with the control unit 34 to perform an operation on receiving or transmitting data or control information to cause a communication line failure.

48 is an operation panel. Operation mode, failure condition e1
, failure term 11, replacement data, insertion data, and information on whether to generate noise are set to the control unit 34 through the control panel 48. A register 34A for storing such human power information is provided in the control section 34.

Next, we will take an example of a case where a communication line failure occurs by setting the receiving 4R side to communication line failure occurrence mode and setting the transmitting side to through mode, replacing part of the received data from the data processing system IO with other data. The operation of the communication line failure generating device 20 will be explained as follows.

Control information and data received from the data processing systems 1 and 10 in the actual operating state are sequentially input to the processing section 46 via the Banff r register 36R and the failure condition determination section 38R. The fault occurrence condition determination unit 38R determines the fault occurrence condition 4L1 (control unit 3
4 is set in the register 40R).

For example, if 3 bytes, 11 colors, and 2 bytes of the received text data are to be replaced, the failure condition determining unit 38
R counts the bytes of data following the STX arrow and turns on the conditional signal SR during the period when 3 bytes [1] and 4 bytes [1] are input to the processing unit 46.

When the condition fulfillment signal pj SR is turned on, the control unit 34 activates the fault data generation unit 42 to generate replacement data. Information for generating this replacement data is set in advance in the register 42A of the failure data generation section 42 by the control section 34. The generated replacement data is input to the processing unit 46R via the register 44R. The control unit 34 also controls the ON period length processing unit 4' of the condition fulfillment signal.
Switch 6R and control Sohaku to move 1J.

Under such control, the processing unit 46R outputs the replacement data input via the register 44R instead of the 3 bytes 11 and 4 bytes II of the manually inputted text data. This output data is the changeover switch circuit 32R.
(Kunite, I: not switched to the opposite side) is sent to the terminal device 12.

Article e1 formation 1γ (1i”j During the period when S R is on, the processing unit 46R processes input data or control
It is controlled to output the f-report as is.

In this way, the third pie 1 and 4 of the received text data
Except for part-timers 11 and control 71-inches, special operation "1" is required.
The signal is output as is from the processing section 46R and sent to the terminal device 12 via the switching switch 32R.

On the transmitting side, the painter mode is the through mode, and the changeover switch circuit 32S is set to the side shown.

Therefore, the data and control information sent from the terminal device I2 are sent to the data processing system 10 as they are.

Here, the case of switching received data has been explained, but the switching of received data (1, control information), and the switching of data or control information transmitted from the terminal device 12 can also be performed by similar excitation to cause IJ.

Next, the case of inserting data into data or control information will be explained. For example, λ: 1 pie between the 3rd byte 11 and the 4th byte 11 of the text data!・The data of ・ shall be inserted.

During the period in which 4 bytes 11 of the received text data are input to the processing unit 46R, the failure occurrence clause 11+11 determining unit 38R turns on the clause 1 establishment signal SR. The control unit 34 activates the failure data generation unit 42 in response to turning on the e1 signal γ signal SR, and causes the failure data generation unit 42 to generate insertion data. This insertion data is input to the processing section 46R via the register 44R. The information for generating this insertion data is provided by the control unit 34
This is set in advance in the register 42A of the fault data generation section 42.

The control unit 34 also controls the data input to the processing unit 46R (or the control terminal f
4J) is delayed and the inserted data is controlled to be output 111 times. A register for such a 'JJi key is provided in the processing section 48R.

When the article f'l formation r'f (, -μ)SR is turned off, the control unit 34 controls the processing unit 46R to sequentially output the data or control information input thereto. Of course,
The 4th byte 11 and subsequent text data are delayed by 1 byte and output from the processing unit 46R. When a predetermined period of time has elapsed after the text has been received, the control section 34 controls the processing section 48R to output manual data or control information without delay.

Regarding reception control information, transmission data, and transmission control information,
Similar excitations can cause data insertion to occur.

The operation of causing a communication line failure by delaying control information or data will be explained. For example, assume that the receiving side delays 3 seconds from 3 bytes II of text data.

During the period when 4 bytes 11 of the text data are manually processed m<48R, the fault occurrence condition °r11 constant part 38R is
1. Turn on SR. Control unit 34
In response to the turning on of the condition \r Shinkyu SR, the failure data generation unit 42 is activated to generate delay time data. This slow, Qll, 11 data is manually input to the processing section 48R via the register 44R. This delay time data is generated by the control unit 34 from the Y/me fault data generation unit 42/meta 4.
It is set to 2A.

The control unit 34 also delays the data (or control information) input to the processing unit 46R by the time specified by the delay time data and outputs the data (or control information) that is input to the processing unit 46R from the time when the condition is established. Control as follows. This delay maneuver is
This is performed using the internal register of the processing unit 48R.

The control unit 34 controls the processing unit 46R to output the input data or control information without delay after a predetermined period of time has elapsed after the text reception path r.

Similar operations can be used to perform delay operations on reception control information, transmission data, transmission data, and 1 control information.

Next, let's look at the ``C theory 11'' regarding the movement f1 that causes the noise transmission to ΦJ1°t and causes a line failure through τ. For example, on the transmitting side, the transmission from the terminal (1, 15 bytes of text data 11 to on HI11: 115 milliseconds, off 11.'i lit 20 milliseconds, 5 cycles of pulse signals with a period of 25 milliseconds) , and the noise is superimposed as (,i''y).

When the 15 bytes 11 of the transmission text data are input to the processing unit 46S, the disabled child 11 current 1/1 determining unit 38S turns on the condition \γC';'jSS. The control unit 34 activates the failure data generation unit 42 in response to turning on the conditional condition 17 LE"n SS, and generates the noise 41"+
'''J is generated by /1. This noise %j is manually inputted to the processing unit 46S via the register 448. Information for generating this noise $I (noise generation information) is controlled by the control unit 34. It is set in the register 42A of the fault data 9/1 generation section 42.

The control unit 34 also controls the article
From the time S is turned on, the data (or control information) manually input to the processing unit 468 and the noise signal are combined with a noise signal (I), and a noise signal (I) is superimposed thereon.

After sending the text 1-1, the control unit 34 performs
When the time period has elapsed, the processing unit 468 is controlled so as not to perform the 1-to-1 alistic OR combination.

In this way, a communication line failure due to the superposition of noise-J is caused to occur. And the ITT of the noise signal
+'t position (for example, the superimposed position in the text as described above) is specified by the fault occurrence condition e1, and the waveform and length of the noise signal are specified by the noise generation information, so it is difficult to avoid noise distortion. Communication due to superimposition (;; Line failure is [
There are 11 current 1/1. In addition, by changing the failure occurrence conditions and noise generation information, it is possible to change the waveforms and lengths of the noise signals (R and noise signals), so that communication line disturbances due to noise generation and H superimposition can be achieved. The situation can be changed in various ways.

Noise can be superimposed on the receiving 11 control information, transmission data, and transmission (;j) control information by the same operation.

As explained in 1-1 below, in the actual operation state where the data processing system 10 actually uses the communication line, the controlled 1Tf due to dead, insertion, delay, and noise signal superimposition is
f5+! It is possible to cause a communication line failure with H to occur. Therefore, it is possible to conduct a detailed and reliable test of the ability of the data processing system 10 to withstand communication line failures in an actual operating state via the communication line. It should be noted that, as a matter of course, the response from the terminal device 12 can also be tested in the same manner (1 line failure can occur, so the test for the communication line failure capability on the terminal device 12 side is also r+7 capable). .

Up to this point, in order to make the explanation In Ill, we have explained the case where one type of communication line failure occurs once, but regarding the data or control information exchanged...
It is also possible to sequentially perform specific operations according to a predetermined sequence, and to cause a set of communication line failures to occur continuously. For example, a sequence of replacing reception control information or reception data, delaying transmission control information or transmission data, superimposing noise on reception control information or reception data, and inserting data into transmission control information or transmission data can be executed in order. .

When such continuous communication line failures occur, a series of failure occurrence conditions, operations for failure generation associated with each failure occurrence condition, insertion data for each operation, replacement data, Delay time data and noise signal generation information are sequentially manually input from the operation panel 48 to the control N<34, and are sequentially stored in the register 34A.

Then, the control unit 34 transfers the generated information such as the first failure condition e1 and the corresponding data to the register 40.
R or 40S and register 42A to cause the first communication line fault to occur. When that communication line failure occurs, the next failure occurrence condition and generation information are set in the same way, and a communication line failure number 2+1 is caused to occur. Thereafter, a series of communication line failures occur in the same manner.

By causing a series of communication line failures to occur one after another in this way, the response including the response on the phase F- side to the communication line failure,
More practical tests can be performed.

Although only one embodiment has been described in 1.1, the present invention is not limited to that, and can be implemented with modifications if appropriate.

For example, the device may have various configurations, and it is also possible to implement its various functions using appropriate software.

In addition, in the above embodiment, 1) Kokichi performs Φ mating of the noise/1 composite bow by 1) 1-alternative sum synthesis to reduce the noise f+j'''J, or by logical sum synthesis and conjunctive product synthesis.
He has 11 abilities.

The noise generation 1j is not limited to the pulse width and the pulse width (even if it is a mixed pulse train).Furthermore, the noise generation is not limited to the pulse width.

[Effects of the Invention] As explained above, the communication 51 four-wire fault generating device according to the present invention has a terminal device connected to the data processing/steno 4 through the communication line (11), and the modem and A judgment plate inserted between the data processing system and the terminal device for making a judgment according to Article 11-A'1 regarding the occurrence of a failure with respect to data or control information exchanged between the data processing system and the terminal device. 7th stage and the protection that maintains the above-mentioned failure occurrence article 11 a'1.
5 steps, retains noise generation information 1. and when the determination means determines whether the failure has occurred in Article 11 e1, generates noise (+'+"J) having a waveform and length specified by the noise generation information. / generation stage; and means for adding noise generated by the generation stage to the data or control information exchanged between the data processing stage and the terminal device described in 1j above. , and the waveform specified by the noise/1 component tI'i HJ at the position specified by the handicapped child/1 line A'1, !: length noise/1 component is Φ folded, I11 current P1
It is possible to cause a certain communication line fault to occur in the actual operation state, and by changing the fault occurrence condition PI and noise generation information, it is possible to cause various communication line faults to occur11, thereby improving the data processing system. Practical communication 1. It is possible to achieve the effect of being able to test and analyze the line failure capability in detail and reliably.

[Brief explanation of drawings]

FIG. 1 is a small diagram illustrating an example of a communication line fault generating device according to the present invention, and FIG. 2 is a system configuration diagram showing a connection state of the communication line fault generating device according to the present invention. 10...Data processing system 1,! 2...Terminal device, 14...Communication line, 16.18...Modem, 20
...Communication line fault generating device, 32R, 32S...υ
No exchange switch circuit, 34...control unit, 34A...register, 36R, 36S...buffer register, 38
R, 38S... Failure occurrence condition f'1 determination unit, 42...
Fault data generation unit, 42A... register, 46R, 4
8S...processing section. Special A Junjin

Claims (2)

[Claims] (1) A communication line failure generating device inserted between a terminal device connected to a data processing system via a communication line and its modem, which is exchanged between the data processing system and the terminal device. determining means for determining a preset failure condition regarding data or control information to be generated; holding means for retaining the failure condition; means for retaining noise generation information; data or control information exchanged between the data processing system and the terminal device, a generation means that generates a noise signal with a waveform and length specified by the noise generation information when it is determined that the following is true; 2. A communication line fault generating device comprising: means for superimposing a noise signal generated by the generating means on the noise signal generated by the generating means. (2) The communication line failure generating device according to claim 1, wherein a pulse signal having a waveform and cycle number specified by the noise generation information is generated by the generation means as the noise signal.