JPH0371829B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] In a pseudo call generation system that generates pseudo calls to be added to an electronic switching system, while the pseudo call generation system stops the operation of the electronic switching system,
The creation of pseudo time information is also stopped to prevent mismatch with the time information in the electronic switching system after operation is resumed.

[Industrial application field]

The present invention relates to an improvement of an external timer simulation method in a pseudo call generation system that generates test pseudo calls for an electronic switching system.

Electronic switching systems are equipped with a function to count clock signals of a predetermined period generated by a built-in clock generator to create time information for processing call charges, etc. It also has a function to calibrate the created time information by comparing it with other information.

On the other hand, a pseudo call generation system is also used to test the operating state of the electronic switching system during overload.

It is desirable that such a pseudo call generation system also create the reference time information mentioned above and add it to the electronic switching system in a pseudo manner so that the time information calibration function can be tested.

[Conventional technology]

FIG. 4 is a diagram showing an example of a conventional external timer simulating method.

In FIG. 4, the electronic switching system 1 includes a communication network 11, a communication interface 12, a central processing unit 13, and a clock generator 14. 131 and a time information calibration section 132.

The central processing unit 13 detects a call arriving from a subscriber line 15 accommodated in the communication path network 11 or a trunk line 16 connecting with another electronic switching system, and sends the call via the communication path system interface 12. gives various control commands (hereinafter referred to as SP orders) to the communication path network 11 to control the setting or release of communication paths;
The control operation is confirmed based on the response information returned from the communication path network 11 within a predetermined time.

On the other hand, the time information creation section 131 counts the clock signal ck generated by the clock generator 14 to create time information ta, which is used for billing processing, statistical data collection processing, and the like.

Further, the time information calibrating unit 132 transmits reference time information tb distributed from the outside (for example, a station that generates the reference time information) via the trunk line 16 at predetermined intervals (for example, 0.5 second intervals) to the communication path network 11 and the reference time information tb. The time information ta received via the communication line interface 12 is compared with the time information ta created by the time information creation unit 131, and if there is a discrepancy, the time information ta is calibrated and an abnormality in the time information creation unit 131 is displayed. .

In order to test the overload characteristics of the central processing unit 13, a pseudo call generation system 2 is installed, and the pseudo call generation system 2 is connected to the communication line interface 12 instead of the communication line network 11.

The pseudo call generation system 2 includes a communication line interface 21, a central processing unit 22, and a clock receiving section 23.

The central processing unit 22 generates pseudo-calls arriving from the subscriber line 15 and the trunk line 16, sends them to the central processing unit 13 via the communication line interfaces 21 and 12, and receives calls from the central processing unit 13. Various SP orders sent via the road interface 12 are sent to the communication road interface 2.
1, the response information to be returned by the communication line network 11 within a predetermined time is created in a pseudo manner, and is returned to the central processing unit 13 via the communication line interfaces 21 and 12.

The central processing unit 22 also includes a clock generator 14.
A clock signal ck with a predetermined period (for example, 4 millisecond period) that is generated is received via the clock reception section 23, and counted by the time information creation section 221 to create pseudo time information tc that simulates the reference time information tb. However, it is also possible to test the time information calibration section 132 in addition to the central processing unit 13 via the communication line interfaces 21 and 12 at predetermined intervals (0.5 second intervals in the example).

Note that when the central processing unit 22, which is slower than the central processing unit 13, is used, when performing an overload test by applying a large amount of pseudo load to the central processing unit 13,
Response information cannot be returned within a predetermined time for a large number of SP orders transmitted from the central processing unit 13.

In such a case, the operation stop control unit 222 monitors the queue length of SP orders transmitted from the central processing unit 13, and if more than a predetermined number of SP orders are connected to the queue, the Processing device 1
The operation stop control signal s transmitted to the central processing unit 13 is set to logic "1" to temporarily stop the operation of the central processing unit 13. While the central processing unit 13 is stopped, the central processing unit 22 is connected to the queue.
Processing is performed on SP orders, and the number of SP orders connected to the queue is reduced to a predetermined number or less.
Operation stop control signal s transmitted to central processing unit 13
is set to logic "0" and causes the central processing unit 13 to resume operation.

While the operation stop control signal s is set to logic "1", the time information creation unit 131 also stops creating the time information ta, so the time information ta is not updated.

However, the clock generator 14 receives the operation stop control signal s.
In order to continue supplying the clock signal ck even while the clock signal ck is set to logic “1”, the time information generation unit 221
continues to create the pseudo time information tc.

Therefore, after the central processing unit 13 that has temporarily stopped its operation resumes its operation, when the time information calibrating unit 132 compares the pseudo time information tc transmitted from the central processing unit 22 with the time information ta, a mismatch occurs and the time information is not created. 131 is mistakenly recognized as abnormal.

[Problems to be Solved by the Invention] As is clear from the above explanation, in the conventional external timer pseudo method, when the central processing unit 22 temporarily stops the operation of the central processing unit 13, the time information creation unit 131 Although the time information ta created by the time information creation unit 221 stops, the pseudo time information tc created by the time information creation unit 221 continues to be updated, so there is a risk that the time information creation unit 132 may misidentify the time information creation unit 131 as abnormal. It was hot.

[Means for solving problems]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, reference numeral 1 denotes an electronic switching system to be subjected to an overload test, 110 denotes communication path equipment, and 13
is a central processing unit; 14 is a clock generator that generates a clock signal ck; 131 is a time information creation unit that creates time information ta; and 132 is a time information calibration unit that compares and calibrates time information ta with external time information tb. be.

Reference numeral 2 denotes a pseudo call generation system that generates a pseudo call that loads the electronic switching system; 221 a time information creation unit that creates pseudo time information tc; and 222 an operation stop that transmits an operation stop control signal s to the central processing unit 13. This is the control section.

Further, within the pseudo call generation system 2, a time creation control section 223 according to the present invention is provided.

[Effect]

The time creation control unit 223 controls the operation stop control unit 22
2 stops the operation of the central processing unit 13, the pseudo time information tc creation process of the time information creation unit 221 is stopped. Therefore, while the pseudo time information tc matches the time information ta, it is not updated.

Therefore, after the operation stop control unit 222 causes the central processing unit 13 to resume operation, the time information creation unit 2
Pseudo time information transmitted by 21 to central processing unit 13
tc matches the time information ta, and the time information calibration unit 132 determines that the time information creation unit 131 is normal, thereby preventing misidentification based on the mismatch between the time information ta and the pseudo time information tc.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a diagram showing an external timer simulation method according to an embodiment of the present invention, and FIG. 3 is a diagram showing an example of the time information creation control process in FIG. 2.
Note that the same reference numerals indicate the same objects throughout the figures.

In FIG. 2, a time creation control unit 223 is provided within the central processing unit 22 of the pseudo call generation system 2.

2 and 3, when the clock generator 14 transmits the clock signal ck of a predetermined period (4 millisecond period in the example) to the central processing unit 22 via the clock receiving section 23, the central processing unit 22
executes the clock interrupt process for the clock (step S1 in FIG. 3), and causes the time creation control section 223 to check the logical value of the operation stop control signal s transmitted by the operation stop control section 222 to the central processing unit 13. (Step S2).

As a result of the inspection, the operation stop control signal s is logic “0”
(step S3), the time creation control unit 223 determines that the central processing unit 13 is in an operating state, and causes the time information creation unit 221 to execute the process of creating pseudo time information tc (step S3). S
4).

On the other hand, if the operation stop control signal s is set to logic "1" as a result of the inspection, the time creation control unit 223 determines that the central processing unit 13 is in the stopped state, and the time information creation unit 221 uses the pseudo time information tc
The creation process is not performed (step S3).

As is clear from the above description, according to the present embodiment, while the central processing unit 13 is not operating, the time information creation unit 131 is not creating time information ta in the same way as when the time information creation unit 131 is stopping the time information ta. Since the unit 221 also stops the pseudo time information tc, the central processing unit 1
3 resumes operation, the time information calibration unit 132
is the pseudo time information transmitted from the central processing unit 22
It is determined that tc and time information ta match, and the time information creation unit 131 is prevented from being mistaken as abnormal.

Note that FIGS. 2 and 3 are only one embodiment of the present invention, and the configurations of the electronic switching system 1 and the pseudo call generation system 2 are not limited to those shown in the figures, and other configurations may be used. Many modifications may be considered, but the effects of the present invention remain the same in any case.

〔Effect of the invention〕

As described above, according to the present invention, in the pseudo call generation system, while the central processing unit of the electronic switching system stops operating, the pseudo time information created by the pseudo call generation system also stops, so even after the operation resumes, the electronic switching system The time information created by the system and the pseudo time information created by the pseudo call generation system will match, and the electronic switching system will be prevented from being mistakenly recognized as abnormal.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing an external timer simulation method according to an embodiment of the present invention, and FIG. 3 is a diagram showing an example of the time information creation control process in FIG. FIG. 4 is a diagram showing an example of a conventional external timer simulating method. In the figure, 1 is an electronic switching system, 2 is a pseudo call generation system, 11 is a communication network, 12 and 2
1 is a communication line interface, 13 and 22 are central processing units, 14 is a clock generator, 15 is a subscriber line, 16 is a trunk line, 23 is a clock receiver,
110 is a communication path system device, 131 and 221 are time information creation units, 132 is a time information calibration unit, 222
223 is an operation stop control unit, 223 is a time creation control unit,
ck is a clock signal, S1 to S4 are steps,
s represents an operation stop control signal, ta represents time information, tb represents reference time information, and tc represents pseudo time information.

Claims (1)

[Claims] 1. Communication path system device 110 and central processing unit 13
and a clock generator 14, the central processing unit 13 includes a time information creation unit 131 that creates time information ta based on the clock signal ck supplied from the clock generator 14; It is connected to the electronic exchange system 1 comprising a time information calibrating section 132 that calibrates the time information ta generated by the section 131 with reference time information tb supplied from the outside, and generates a pseudo load to be applied to the central processing unit 13. , and receives the clock signal ck generated by the clock generator 14, and receives the reference time information.
A time information creation unit 221 that creates pseudo time information tc that simulates tb, and monitors the amount of load generation requests transmitted from the central processing unit 13 to the pseudo call generation system 2, and determines the amount of load generation requests that are determined in advance. In the pseudo call generation system 2, the operation stop control section 222 includes an operation stop control section 222 that temporarily stops the operation of the central processing unit 13 when the specified value is reached. 2. An external timer pseudo method, characterized in that a time creation control section 223 is provided for stopping the pseudo time information tc creation process of the time information creation section 221 while the time information creation section 221 is stopping the pseudo time information tc creation process.