JPH0728283B2 - Network work simulator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A call volume table having a call volume control information chain in which a call volume coefficient is set corresponding to an arbitrary predetermined time point on a time axis is provided, and the above call volume is supplied to a device under test. It is disclosed that, in a network simulator that performs a call generation simulation corresponding to the contents of the table, the contents of the call volume table can be rewritten during the simulation so that the test can be performed efficiently. ing.

[Industrial application field]

The present invention relates to a network simulator, and more particularly to a network simulator configured so that a call generation mode can be changed during a call generation simulation.

[Conventional technology]

Conventionally, a network simulator has been known and has a configuration as shown in FIG. Also in the case of the present invention, it has basically the same configuration.

In the figure, reference numeral 1 is a network simulator, 2 is a device under test, 3 is a call volume function table, 4 is a call volume table, 4-1, 4−
2, 4-3, ... Represent call control information, and 5 is call data (telegram).

The call volume table 4 and the call data 5 can be pointed to by the call volume function table 3. In the call volume table 4, generally, a plurality of call volume control information 4-1, 4-2, ... Is chained and held. For the call volume control information 4-1, 4-2, ..., set the call generation amount to be performed at that time point as a call volume coefficient at each arbitrary predetermined time point corresponding to the lapse of time after the start of simulation. To be

In the case shown in FIG. 3, (i) the call volume coefficient is 0 at the beginning (time 0 (minutes), and (ii) the call volume coefficient is 10 after 60 minutes.
Then, (iii) the call volume coefficient is 10 after 120 minutes, and (iv) 180
It is set that the call generation simulation should be performed so that the call volume coefficient is 20 when minutes have passed and (v) the call volume coefficient is 0 when 240 minutes have passed.

FIG. 4 is a call volume curve showing the call volume coefficient given by the contents of the above-mentioned call volume table as time passes. In the case shown, from the start of the simulation,
The call volume increased linearly, and the call volume coefficient was set to 10 after 60 minutes, then increased to 120 minutes under the same call volume coefficient, increased again from 120 minutes, and reached the call volume coefficient at 180 minutes. Is set to be 20 minutes, and then it is instructed to decrease linearly until 240 minutes.

The network simulator 1 performs a call generation simulation on the device under test 2 along the call volume curve shown in FIG. 4, in other words, according to the contents of the call volume table 4.

FIG. 5 illustrates how a call is actually generated when a call volume curve as shown in FIG. 4 is given.

In FIG. 5, the lower part shows the same call volume curve as that shown in FIG. 4, and the upper part shows the situation of call generation corresponding to the call volume curve.

In general, the call volume function that represents the call frequency follows the following formula.

tn _-1 : n-1st call volume generation time point tn: nth call volume generation time point In the range of t = 0 to 1 (time) shown in FIG. 5, f (t) = 10t is given, and t = When 1 (hour), the call volume coefficient becomes 10 1
It is a next function, and the function of Expression (1) is as follows during t = 0 to 1 (time).

Therefore, when the traffic volume occurs, Becomes

It should be noted that the number of messages to be transmitted for one call is, so to speak, arbitrary because the user defines the message and the number of messages. Therefore, as shown in FIG. 6 (A), three telegrams may be sent in one call, and FIG. 6 (B) is sent.
As shown in the figure, one message may be sent in one call.

[Problems to be solved by the invention]

Conventionally, in the network simulator, the call generation simulation is performed as described above. However, in the conventional case, it was necessary to set the contents of the above-mentioned call volume table when the program was started. For this reason, the number of call occurrences has to be predicted and the above settings have to be made in order to determine the form of call occurrence.

As a result, if a situation occurs in which the predicted call generation amount does not reach the maximum load performance value in the maximum load performance test, etc., the above settings will be redone and retested. When trying to check up to what value the failure will occur and what value will not cause the failure, the above setting will be repeated and a retest will be performed, which is extremely inefficient.

[Means for solving problems]

The present invention solves the above points, and FIG. 1 shows the principle of the present invention.

FIG. 1 (A) shows the contents of the call volume table set at the start of the program. FIG. 1 (D) shows a call volume curve corresponding to the contents.

FIG. 1B shows change data input during the execution of the program. Reference numerals 4-A, 4-B and 4-C in the figure respectively represent changed call volume control information. Then, FIG. 1 (E) shows the call volume coefficient indicated by the modified call volume control information by a solid line, and FIG. 1 (F) shows the first line with respect to the call volume curve shown in FIG. 1 (D). FIG. 6E shows a call volume curve as a result of the changes shown in FIG.

Similarly, FIG. 1 (C) shows change data input during the execution of the program. Reference symbols 4-D, 4- in the figure
E, ..., 4-G respectively represent changed call volume control information. FIG. 1 (G) shows experimentally the call volume coefficient indicated by the modified call volume control information, and FIG. 1 (H) is shown in FIG. 1 (D).
The figure shows the call volume curve as a result of the modification shown in FIG. 1 (G) being added to the call volume curve shown.

When the change data as shown in FIG. 1 (B) is given after the program as shown in FIG. 1 (A) is set in the call volume cable 4 and the program is started, under predetermined conditions,
The contents of the call volume table 4 are changed in such a way that the connection between FIG. 1 (A) and FIG. 1 (B) is connected by a dotted line, and in the subsequent execution of the program, the call volume table 4 of FIG. It is made to follow the contents.

[Action]

It is assumed that the contents as shown in FIG. 1 (A) are set in the call volume table 4 and, for example, 30 minutes have elapsed after the start of the program. Then, under this state, it is assumed that a change command is input in order to input the change data as shown in FIG. 1 (B).

In the simulator 1, it is checked whether or not the change command is valid, and if it is, the changed call volume control information 4 corresponding to the change data (change data as shown in FIG. 1B). -A, 4-B, 4-C are allowed to be entered. The input changed call volume control information 4-A, 4
-B, 4-C is checked for logical inconsistency, and the relevant information 4-A, 4-B, 4-C on the call volume table 4 is used for call volume control information 4-3, 4- The old call volume control information which is no longer needed after being replaced with No. 4 is deleted from the table 4. After that, the simulator 1 carries out a call generation simulation according to the contents of the call volume table 4 in which the changed result exists.

The same applies when the change data as shown in FIG. 1 (C) is input.

〔Example〕

FIG. 2 shows an embodiment of the main part of the present invention. Reference numerals 3, 4, 4-1 to 4-5, 4-D to 4- in the figure
G corresponds to FIG. Reference numeral 6 represents the data rewriting processing mechanism in the form of a flow chart.

It is assumed that the call volume control information is set in the call volume table 4 as shown in the upper left of FIG. 2 and the program is started. Under this condition, a change command is given to change the traffic volume curve.

In response to this, the data rewriting processing mechanism 6 is activated,
It is checked whether the above change command is valid. If it is legitimate, prompt the creation of change data. It is checked whether the change data has any inconsistency or whether there is an instruction for the past. If the check result is correct,
Like the route (A) shown in the figure, the call volume control information is changed on the call volume table 4, and unnecessary information is deleted.

If the command is not valid or the change data is not correct, the process proceeds to the illustrated route (B) to output the error mode and the like, and if the change data has been created, delete it.

〔The invention's effect〕

As described above, according to the present invention, it is possible to change the contents of the call volume table in the middle after the simulation is started. This eliminates the need for undesired retests.

The processing for changing the contents of the call volume table is performed while the call is being generated according to the call volume curve as shown in FIG.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention, FIG. 2 is an embodiment of a main part of the present invention, FIG. 3 is a main part configuration of a network simulator, and FIG. 4 is an explanatory view for explaining a call volume curve, FIG. 5 is an explanatory diagram for explaining the relationship between the call volume curve and the mode of call generation,
FIG. 6 shows an explanatory diagram for explaining a message transmission mode. In the figure, 1 is the network simulator, 2 is the device under test, and 3 is
Is a call volume function table, 4 is a call volume table, 4-1, 4-2, ... are call volume control information, 4-A, 4-B, ... are changed call volume control information, 5 is call data, 6 is This shows the data rewriting processing mechanism.

Claims (1)

[Claims] 1. A call volume table pointed to by a call volume function table and call data are prepared, and the call volume table sets a call volume coefficient corresponding to an arbitrary predetermined time point on a time axis. Concerning the call volume control information, the call volume control information is configured to be chained and held. Based on the call volume control information, a call is generated to the device under test in response to the passage of time, and the call is transmitted. In a network simulator that supplies data corresponding to each call corresponding to each call, the modified call volume control information in which the above call volume constants are set corresponding to arbitrary predetermined time points on the above-mentioned time axis is used alone or in plural. It is configured so that it can be supplied as change data by chaining the individual pieces, and in response to the supply of the change data, the validity of the change data is checked, and the above The call volume control information in the contents of the call volume table is configured to replace the chain with the changed call volume control information based on the call volume control information, and a call generation simulation for the device under test is being performed. A network simulator characterized in that the content of the call volume table is rewritten on the way to change the call generation mode in the call generation simulation.