KR920001887B1 - Calls simulation method of electronic switching center - Google Patents

Abstract

The method simulates various subscriber calls and inter- station relaying calls. The method includes the steps of: selecting desired simulators to define them as simulation control groups for the purpose of using them as regulating units (20); preparing and inputting simulation programs (21); inputting simulation digits (22); tracing simulation signals (24); executing the simulation programs (25); terminating the operation or advancing to the next step depending on the occurrence of an error (27); and terminating the operation by releasing the simulators.

Description

Electronic Exchange Call Simulation Method

1 is a block diagram of an exchange environment simulator system.

2 is a flow chart for performing a simulation.

* Explanation of symbols for main parts of the drawings

1: Simulation controller (SC) 2: Subscriber simulator (SLS)

3: analog trunk simulator (ATS) 4: digital trunk simulator (DTS)

5: trunk register simulator (TRS)

The present invention relates to an electronic exchange call simulation method for simulating various types of subscriber and station relay calls that can be generated in an electronic exchange.

Existing call simulation methods act as a simple call generator that performs a parameter change only for a given call type, so that a test can be made for an abnormal call that can be generated by a real user, and a test service for an electronic exchange special service in which several subscribers are linked. This is difficult.

It is an object of the present invention to simulate the various types of subscriber and national relay calls of an exchange so that it can be tested under the most realistic conditions in performing the test on the call processing function which is the core of the exchange function. It is to provide a call simulation method that can perform precise test on abnormal call or special service function.

The present invention provides a subscriber simulator (SLS) for simulating subscribers, an analog trunk simulator (ATS) for simulating mechanical and inverting stations, and a digital trunk simulation (DTS) for simulating T1-station relays. A switch environment simulator system consisting of a trunk register simulation (TRS) for simulating an RS MFC register signal, and a simulation controller for controlling the simulation by controlling the simulators, the control unit for selecting a simulator from among the simulators and selecting the necessary simulators. The first step is to define a simulation control group, which is to input and output the signal procedure to send and receive each simulator in the simulation program language, and to input the simulation digits to send and receive. In case of requesting the periodic tracking function of the signal input to the simulator, the second step is to perform the simulation program by tracking the signal, and if there is no request, to perform the simulation program directly. If it stops and does not occur, it repeats the third step to the next step, and if the same experiment case is repeatedly performed, it displays the completed number of times or the frequency of error occurrence for the required number of executions. The fourth step of terminating the execution by releasing the simulator defined in is characterized in that the configuration.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention. 1 is a block diagram of an exchange environment simulator system for the present invention, in which there is a subscriber simulator (SLS: 2) for simulating a subscriber and an analog trunk simulator (ATS: 3), T1 for simulating mechanical and inverting station relays. There are digital trunk simulator (Dts: 4) to simulate relay between stations and trunk register simulator (TRS: 5) to simulate R2MFC register signal, and simulation controller (SC: 1) to control the simulation by controlling these simulators have.

In addition, in order to automate call simulation using these simulators, the call generation process must be controllable in a test language. The test languages provided by the exchange environment simulator include the simulation control comments shown in Table 1 and the simulation program commands shown in Table 2.

TABLE 1

TABLE 2

The simulation control commands to control the execution of the simulation are designed in a parametric fashion with parameter names defined in accordance with the CCITT MML Recommendations, defining and releasing simulators required for call generation, storing and outputting simulation programs and digits, and Start and end, tracking signals received by the simulator from the exchange under test, and outputting the status of the simulation can be performed.

The simulation program instruction is designed by subdividing the incremental signal between subscriber and station into basic unit operation. It is possible to express normal or abnormal operation of subscriber and various station relay signals by command combination. Especially, it is possible to measure exchange response time and match simulation execution motive for signal input to simulator. The simulation program instructions are in the form of assemblies consisting of keywords, which are abbreviations of unit operations of signals, and parameters for data that vary according to the signaling method.

2 is a simulation execution flow chart. The procedure of simulating a call is first defined as a simulation control group which selects necessary simulators from among these simulators and becomes a control unit when a call is generated (20). The simulations of the simulators defined in one simulation control group coincide with the performance motive when the simulation is performed, and the simulation can be performed simultaneously in parallel to each simulation group.

Next, a signal procedure for transmitting and receiving each simulator is programmed and input in a simulation program language (21), and a simulation digit to be transmitted and received is input (22). In this program, the control of the monitoring and selection signals of the call is simulated and the nature of the simulated call is determined. Simulation programs and simulation digits are stored in a dialog procedure format, and the simulation program is designed with simple editing functions to modify, add, and delete stored programs.

The exchange environment simulator system is designed with a signal tracking function that indirectly confirms the operation of the exchange by tracking every 8 ms periods that enter the simulator from the exchange under test. When the user requests this tracking function (23), the simulator periodically checks the input signal and, if there is a change, the time since the start of tracking, the time interval from the previous change, the signal being sent and the changed input signal, etc. The output is (24).

The generation of the simulation call is to execute the simulation program of the simulators included in the simulation control group (25). Simultaneous execution of the simulators included in the control group is synchronized, synchronization is completed, and execution is completed (27). The result is outputted as follows.

If one of the simulators does not match the simulation program, that is, if an error occurs (26), the execution of all simulators included in the simulation is stopped, and the location of the failed simulation program and the simulations sent and received so far. The number of digits was output so that the tester could confirm. The output form is as follows.

In addition, when the same test case is repeatedly executed (28), the number of completed executions or the frequency of error occurrences is output for the requested executions. The form is as follows.

When the call simulation is completed, the simulators defined in the simulation control group are released and terminated (29).

Using this call simulation, the following effects can be obtained.

First, the simulation can be performed on abnormal calls that may occur in the exchange in the actual situation, so that the abnormal processing operation of the exchange can be performed.

Second, by making the test procedure for various types of calls into test procedures, it is possible to repeat the same test all the time, increasing the objectivity of the test and increasing the test efficiency.

Claims (5)

Subscriber simulator (SLS) to simulate subscribers, analog trunk simulator (ATS) to simulate mechanical and inverted station relays, digital trunk simulator (DTS) to simulate T1 station relays, and R2 MFC register signals In the switchboard environment simulator system consisting of a trunk register simulator (TRS) and a simulation controller for controlling the simulation by controlling the simulators, the simulator is selected as a simulation control group that is selected as a control unit when a call is generated by selecting necessary simulators from the simulators; 20) The first step of programming and inputting a signal procedure to be transmitted and received in each simulator in a simulation program language (21) and inputting a simulation digit to be transmitted and received (22), and the signal input to the simulator. In the case of the miracle tracking function (23), the signal is traced (24) to carry out the simulation program (25) and the simulation program is performed directly if not required (25), and if an error is invented (26), the simulation is included in the simulation. If the execution of all simulators is stopped and does not occur, the next step (27) and the same test case are repeatedly performed (28). And a fourth step of terminating the execution by releasing (29) the simulators defined in the simulation control group if not output and repeating. The method according to claim 1, wherein the tracking (24) of the signal input to the simulator in the second step tracks the operation of the exchange indirectly by tracking the period of 8ms. The method of claim 1, wherein in the first step, the call generation control unit is defined as a simulation control group (20), and parallel execution is possible for the simulation control groups so that various types of calls can be simultaneously simulated. Electronic exchange call simulation method. The method of claim 1, wherein a simulation control command and a simulation program command are used during call simulation automation. 2. The electronic exchange symbol according to claim 1, wherein in the first step, the simulation program and the simulation digit are stored in an interactive procedure format, and the simulation program is designed with a simple editing function for modifying, adding, and deleting the stored program. Simulation method.

Images