KR100237002B1 - Method for generating abstract test suite in advanced network switching system - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method for generating an abstract test suite for an intelligent network switch.

2. The technical problem to be solved by the invention

The present invention provides an abstract test suite for generating an abstract test suite with high reliability by generating an abstract test suite capable of testing an intelligent network switch implemented according to an intelligent network application protocol by an automated method using a formal technique. To provide a method of creation.

3. Summary of Solution to Invention

The present invention relates to a method for generating an abstract test suite of an intelligent network application protocol for an intelligent network switch, the method comprising: automatically generating an action part of a test standard which is a series of messages transmitted and received between a tester and a test target system for an arbitrary test purpose. Stage 1; And a second step of defining, using an editor, the data portion of the abstract test suite required by the behavior portion of the test specification.

4. Important uses of the invention

The present invention is used for testing intelligent network application protocols such as intelligent network switch.

Description

Abstract test suite generation method for intelligent network switch {METHOD FOR GENERATING ABSTRACT TEST SUITE IN ADVANCED NETWORK SWITCHING SYSTEM}

The present invention relates to a method for generating an abstract test suite (ATS) capable of testing a service switching point (SSP) implemented according to the Intelligent Network Application Protocol (INAP) specification.

Conventional protocol tests were performed based on abstract test suites (ATS) generated by manual methods from system specifications.

Therefore, the conventional abstract test suite generation method is difficult to guarantee the reliability due to editing errors or unexpected errors that may occur during ATS generation, and it takes a lot of time because the ATS is manually described for a large amount of specifications. In addition, when adding or changing the system function to be tested, the ATS also needs to reflect the corresponding change, which causes a lot of time.

In order to solve the above problems, the present invention provides an abstract test suite capable of testing an intelligent network exchanger implemented according to an intelligent network application protocol specification by an automated method using a formalized technique, thereby providing high reliability and abstraction. The object of the present invention is to provide an abstract test suite generating method for generating a test suite.

1 is an exemplary configuration of a next generation intelligent network to which the present invention is applied.

2 is an exemplary configuration diagram of an intelligent network application protocol in an intelligent network switch to which the present invention is applied.

3 is a diagram illustrating an embodiment of an abstract test suite generation method for an intelligent network switch according to the present invention;

Figure 4 is an exemplary diagram illustrating the purpose of the test in the message sequence chart (SMC) of Figure 3 in accordance with the present invention.

* Explanation of symbols for the main parts of the drawings

10: Service Control System (SCP)

20: intelligent network switch (SSP)

30: Intelligent Peripheral (IP)

In order to achieve the above object, the present invention provides a method for generating an abstract test suite of an intelligent network application protocol for an intelligent network switch, wherein an action part of a test standard is a series of messages transmitted and received between a tester and a test target system for an arbitrary test purpose. A first step of automatically generating; And a second step of defining, using an editor, the data portion of the abstract test suite required by the behavior portion of the test specification.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention;

1 is an exemplary configuration of a next generation intelligent network to which the present invention is applied.

The Advanced Intelligent Network (AIN) service provides AIN devices with an intelligent network service by interworking with each other, and AIN can be classified into four functional entities in terms of service provision.

Looking at these functional entities, it performs a call control function (CCF) (22) and detects an intelligent network service from the basic call processing of the exchange and requests a service switching function (SSF) (12). ), A service control function (SCF) (11) for performing the requested intelligent network service, a specialized resource function (SRF) (31) for the user interface during service execution, and a service necessary for performing the service. There is a Service Data Function (SDF) 12 for managing data.

Each functional entity includes a service switching point (SSP) 20, a service control point (SCP) 10, an intelligent peripheral (IP) 30, and a service, which are physical entities. Each data system (SDP: Service Data Point) 12 is physically corresponding to and mounted.

Intelligent Network Application Protocol (INAP) is an application protocol for supporting signals required for interaction between next-generation AIN functional entities. It supports application layer interfaces between SCF-SSF, SCF-SRF, and SCF-SDF functional entities.

The intelligent network service can be supported by the interaction between functional entities.In order for the interaction to be successful, the intelligent network application protocol (INAP) that supports signals between the functional entities must be implemented according to the standard. Conformance testing to ensure that the implementation is in accordance with the standard is done with the intelligent network application protocol.

A conformance test requires a test specification to test it. A test specification written in a standardized language is called an abstract test suite (ATS). Here, there are a method of generating an abstract test suite, a method of generating manually from a protocol specification and a method of generating using an automated tool.

Next-generation intelligent network (AIN) devices to which the present invention is applied will be described in more detail AIN service that provides the intelligent network service to the subscriber in conjunction with each other.

When the call originated from the telephone terminal is transmitted to the intelligent network switch 20, which is an intelligent network device, the intelligent network switch 20 sends a service request message to the intelligent network switch 20 and the service control system 10 according to the caller's request to use the intelligent network service. ) Is transmitted to the service control system 20 in the next generation intelligent network application protocol (INAP) message through the interface between.

The service logic in the service control system 20 controls the service with reference to the profile of the service subscriber stored in the form of a database in the service data function 12. At this time, if additional information is required from the caller for service processing, the intelligent peripheral device 30 is connected to the interface to collect information from the caller.

When the service processing is completed and the service control system 10 loads the result in the intelligent network application protocol message and transmits the result to the intelligent network switch 20, the intelligent network switch 20 sends and receives the result data received from the service control system 10. Connect calls between telephone terminals or perform other supplementary services.

2 is an exemplary configuration diagram of an intelligent network application protocol in an intelligent network switch to which the present invention is applied, and shows a test shape of a test target system.

In addition to the service exchange function 21, the intelligent network switch 20, which is a test target system, has an intelligent network application protocol interface 22, a detection point 23, an origination basic call state model (OBCSM) 24, and Termination Basic Call State Model (TBCSM) 25.

In testing the intelligent network switch 20, the lower tester 1 (LT) 10 corresponding to the service control system 10 as a main tester for testing the intelligent network switch 20 is an intelligent network of the intelligent network switch 20. Send and receive signals via the application protocol interface 22. At this time, according to the content of the test item, the intelligent network switch 20 transmits and receives a signal through the intelligent network application protocol interface 22, and receives a signal from the originating and incoming basic call state module (24, 25).

The lower tester 2 (LT2) 26 is an originating terminal that generates a network event, and transmits a signal to the intelligent network switch 20 through an interface other than the intelligent network application protocol in order to make the intelligent network switch 20 a test target state.

The lower tester 3 (LT3) 27 has the same function as the lower tester 2 (26), and differs in that it is a called terminal.

The intelligent network exchanger 20 and each of the lower testers 10, 26, and 27, which are a test target system, transmit and receive signals through a point of control and observation (PCO) (a, b, c), and the lower tester 1 (10) and lower tester 2 (26), lower tester 1 (10) and lower tester 3 (27) transmit and receive signals through adjustment point 1 (d) and adjustment point 2 (e), respectively. At this time, the lower tester 1 (10) instructs the lower tester (26, 27) to transmit the appropriate signal to the intelligent network switch 20 through the adjustment point (d, e).

3 is a diagram illustrating an embodiment of an abstract test suite generation method for an intelligent network switch according to the present invention.

Creating an abstract test suite can be roughly divided into the process of automatically generating the behavior part of the test specification and the process of describing the data. The tool used to automatically generate the abstract test suite is the data part. This is because it does not completely generate. That is, the behavior part of the test specification can be generated using automated tools, but the data part must be created manually. Here, the behavior of the test specification refers to a series of messages transmitted and received between the tester and the intelligent network switch 20, which is the system under test, for any test purpose.

In the process of generating the behavior part of the test specification, "ObjectGEODE" of "Verilog" was used as a formal description technique (FDT). In describing the data, the tree and tabular combined notation (TTCN) was used. Notation) editor was used.

First, a finite state machine of the service exchange function 21 is modeled from the intelligent network application protocol specification 301 by using a specification and description language (SDL) editor (302), and the intelligent network switch ( 20) describes the purpose of the test to test the message sequence chart (MSC) (309).

The process 302 of modeling the finite state machine of the service exchange function 21 can be divided into the structural design process 303 and the detailed design process 306. In the structural design process 303, the static aspects of the system and the dynamic Create a system schematic 304 and interconnect diagram 305 describing the aspects of the process, and in the detailed design process 306, the processes at the lowest level of the system schematic 304 created in the structural design process 303. Write the finite state machine in a detailed description language.

In the structural design process 303, the system schematic 304 shows the hierarchical structure of the components constituting the system and the static aspects of the system, and the interconnect diagram 305 shows each level of the system schematic 304 The components that make up the system simultaneously represent the static and dynamic aspects of the system and the flow of messages to and from the external environment. Here, the connection relationship between the message and the components defined in the interconnection diagram 305 is necessary when defining signals transmitted and received by the processes in the detailed design process 306.

In the detailed design process 306, the process diagram 307 describes in a detailed description language the finite state machines of the processes at the lowest level of the system schematic 304 created in the structural design process 303.

A structural design process 303 and a detailed design process 306 create a finite state machine model of the service exchange function 21 in the detailed description language (308).

Meanwhile, in order to test the intelligent network switch 20, the test purpose is created through the message sequential chart MSC (309), and the test purpose is described in the message sequential chart MSC (310).

In the creation of the finite state machine model of the service exchange function 21 in the detailed description language generated from the process 302 of modeling the finite state machine of the service exchange function 21 308 and the creation of the test purpose 309. The preparation of test objectives 310 described in the generated message sequential chart (MSC) involves compiling for error validation and then generating the simulated test and schematic and table combined notation (TTCN) for all possible cases (311). Rough

Subsequently, the process of generating a simulation test and a schematic and table combined notation (TTCN) 311 includes a verification process 312 through a simulation, a limited state graph generation process 313, and a schematic and table combined notation generating process ( 314).

Through the verification process 312 through the simulation test, a state graph limited to the test purpose is generated (313), and this state graph is input to generate the behavior part of the test specification through the schematic diagram and the table combination notation generator 314. (315).

Next, the data description process 316 of the abstract test suite defines the data portion of the abstract test suite using the schematic and table combination notation editor in a passive manner rather than an automated method (317).

In addition, the abstract test is defined by combining the test part of the test specification generated from the simulation test and the schematic and the table combining notation generation process 311 and the data of the abstract test suite required by the action part (317). After modifying and supplementing the suite (318), verifying that the modified and supplemented abstract test suite is complete without errors (316), an abstract test suite of complete service exchange functionality (21) is created (320).

FIG. 4 is an exemplary explanatory diagram illustrating a test purpose in the message sequential chart (SMC) of FIG. 3 according to the present invention.

The test objective 310 described in the message sequential chart (MSC) is a test scenario for verifying that an implementation under test (IUT) operates in accordance with the specification.

Test objective 310 is described as a message sequential chart (MSC), and a series of intelligent application protocol operations between the finite state machine model 308 of the service exchange function 21 and the service control system 10 written in the detailed description language. It becomes the test object 310. Here, the finite state machine model 308 of the service exchange function 21 written in the detailed description language corresponds to the test object, and the service control system 10 which transmits and receives a message with the finite state machine model 308 is a lower tester ( LT).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited to the drawing.

As described above, the present invention guarantees reliability due to editing errors or unexpected errors that may occur when creating an abstract test suite (ATS), and improves test reliability of an intelligent network switch when testing an intelligent network switch with ATS. This can save time and money when modifications to the ATS occur as a result of changes or additions to the test system.

Claims (6)

An abstract test suite generation method of an intelligent network application protocol for an intelligent network switch, A first step of automatically generating an action portion of a test specification, a series of messages sent and received between the tester and the system under test for any test purpose; And A second step of defining, using an editor, the data portion of the abstract test suite required by the action portion of the test specification; Abstract test suite generation method comprising a. The method of claim 1, The first step is, A third step of modeling a finite state machine of a service exchange function using a detailed description language editor from an intelligent network application protocol specification; A fourth step of creating a test purpose for testing the intelligent network switch with a message sequence chart; And The fifth step of compiling the finite state machine model of the service exchange function and the test purpose, inputting the state graph generated through the simulation test, and performing the schematic and table combined notation generator to generate the behavior part of the test specification. Abstract test suite generation method comprising a. The method of claim 2, The third step, A sixth step of creating a system structural diagram showing a hierarchical structure of components constituting the system and a static aspect of the system; A seventh step of creating an interconnection diagram representing the static and dynamic aspects of the system and the flow of messages transmitted and received by the components constituting each level of the system structure diagram; And An eighth step of writing in a detailed description language a finite state machine of processes at the lowest level of the system schematic Abstract test suite generation method comprising a. The method of claim 2 or 3, The fifth step, A ninth step of verifying, through a mock test, the test purpose described by the finite state machine model of the service exchange function and the message circulation chart written in the detailed description language; A tenth step of creating a limited state graph of the test purpose verified through the simulation test; And An eleventh step of inputting the state graph to generate an acting part of a test specification through a schematic diagram and a table combining notation generator Abstract test suite generation method comprising a. The method according to claim 1 or 2, The second step, A sixth step of defining a data portion of the abstract test suite using a schematic diagram and a table combined notation editor in a manual manner; A seventh step of modifying and supplementing the abstract test suite by combining the defined data of the test part and the test part required by the test part; And An eighth step of generating an abstract test suite of complete service exchange functionality by verifying that the modified and supplemented abstract test suite is complete without errors Abstract test suite generation method comprising a. The method of claim 2, The message sequence chart for creating the test purpose of the fourth step is It aims to test a series of intelligent network application protocol operations between the service exchange function's finite state machine model and the service control system written in the detailed description language, and the finite state machine model of the service exchange function written in the detailed description language. How to create an abstract test suite.

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