KR20110027103A - Apparatus and method for testing performance of slave station applied to dlms/cosem protocol based on ttcn-3 core language - Google Patents

Abstract

PURPOSE: An apparatus for testing performance of a slave station applied to a DLMS/COSEM(Device Language Message Specification/Companion Specification for Energy Metering) protocol based on a TTCN-3 core language and a method thereof are provided to perform a suitability test for a base station which supports different protocol. CONSTITUTION: A compiler module(110) compiles a source developed by the TTCN-3(Testing & Test Control Notation version 3) core language. A processor module(120) performs a process file which is generated by the compiler module. An encoding module(130) encodes test data in order to be suitable for the DLMS/COSEM protocol. An interface module(140) receives a response data which is transmitted from a slave station(200). A decoding module(150) decodes the response data received through the communication interface module.

Description

TNC-3 core language-based test apparatus for testing conformity of a country supporting the DLMS / COOSM protocol and a test method using the same {APPARATUS AND METHOD FOR TESTING PERFORMANCE OF SLAVE STATION APPLIED TO DLMS / COSEM PROTOCOL BASED ON TTCN-3 CORE LANGUAGE }

The present invention relates to a TTCN-3 core language based test apparatus for testing suitability of a sub-station supporting the DLMS / COSEM protocol and a test method using the same. In particular, the present invention relates to a DLMS / COSEM protocol using a TTCN-3 core language. The present invention relates to a test apparatus based on the TTCN-3 core language and a test method using the same.

The present invention is derived from a study conducted as part of a new technology R & D project of the Seoul Metropolitan Government and the Seoul Development Institute. [Task Management No.:NT070064, Title: Development of Embedded Linux-based Distribution Automation System Gateway and Interoperability Tester].

A protocol is a promise of communication rules and methods defined for smoothly performing information exchange between information devices such as computers or between a computer and a terminal, that is, a protocol of communication.

Protocols are used in a variety of industries, and master and slave stations must support specific protocols in order to communicate using them.

1 is a block diagram showing a communication system between a main station and a sub station according to the prior art.

As shown in FIG. 1, the master station 10 may communicate with one or more sub-stations 20, 30, 40 through a specific protocol.

When the sub-station 50 wants to communicate with the main station 10 through a specific protocol, it should be determined whether the sub-station 50 can communicate with the main station 10 through the specific protocol. That is, in order to test the suitability of the sub-station, a test apparatus capable of performing a test on a specific protocol is used to test whether the sub-station supports a specific protocol.

In general, there is a DLMS (Device Language Message Specification) as a protocol used in the electric and power fields.

The DLMS protocol is mainly used for remote meter reading of electricity meters. To ensure mutual compatibility, the DLMS protocols model various data handled by the weighing device as logical objects, define data messages by standardizing them, and define the transmission method to various transmission media. Is an international standard for remote metering communication protocols.

Specifically, the international standard for the DLMS protocol originates from the International Electrotechnical Commission (IEC) 61170 (FLAG) and IEC 61334-4-41 (Distribution Line Messaging Specification) international standards, the scope of which is used in the electrical field. In addition, it is applied to electronic electricity meter.

The DLMS / COSEM protocol, which applies the COSEM (Companion Specification for Energy Metering) interface to the international standard of the DLMS protocol, is a next-generation power meter communication protocol based on the IEC 62056 international standard.

However, no test apparatus has been developed to test the suitability of a country supporting the DLMS / COSEM protocol, such as a power meter. Therefore, it is urgent to develop a test apparatus for testing a sub-station supporting the DLMS / COSEM protocol.

In order to solve the above problems, the present invention uses the TTCN-3 core language, which is an international standard test language, to test the suitability of a sub-station supporting the DLMS / COSEM protocol that can easily test whether the sub-station supports the DLMS / COSEM protocol. An object of the present invention is to provide a test device based on the TTCN-3 core language and a test method using the same.

A TTCN-3 core language based test apparatus for testing suitability of a sub-station supporting the DLMS / COSEM protocol according to the present invention, comprising: a compiler module for compiling a source written in the TTCN-3 core language including a test item; A processor module for executing an executable file generated by the compiler module; An encoding module for encoding test data relating to the test item included in the executable file to conform to the DLMS / COSEM protocol; A communication interface module which transmits the test data encoded by the encoding module to the sub-station, and receives the response data transmitted by the sub-station; And a decoding module for decoding the response data received through the communication interface module, wherein the processor module generates test result data by analyzing the response data decoded by the decoding module.

Preferably, the processor module according to the present invention generates the test result data by comparing the response data with reference data, and preferably executes test data about the test item included in the executable file.

Preferably, the communication interface module according to the present invention communicates with the sub-station via RS-232, and the encoding module preferably encodes the test data into an HDLC frame structure.

A test method for testing suitability of a sub-station supporting the DLMS / COSEM protocol according to the present invention, the method comprising: (a) compiling a source written in a TTCN-3 core language including a test item to generate an executable file; (b) encoding test data related to the test item included in the executable file to conform to the DLMS / COSEM protocol and transmitting it to the sub-station; (c) decoding the response data received from the sub-station; And (d) analyzing the decoded response data to generate test result data.

Step (d) according to the present invention preferably includes the step of generating the test result data by comparing the decoded response data with reference data.

According to the present invention, since the substation conforms to the DLMS / COSEM protocol used in the field of electricity and power, the substation conformity test is performed based on the executable file generated by compiling the source code written in the TTCN-3 core language. The advantage is that compliance testing is easy.

In addition, since the source containing the test items is written in the TTCN-3 core language, it is not only easy to write test items for performing conformity tests of sub-stations supporting protocols other than DLMS / COSEM protocol, but also supports other protocols. Conformance testing can also be easily carried out for those stations.

In addition, since the test apparatus according to the present invention communicates with the sub-station via RS-232, it is possible to easily perform the conformity test of the sub-station even in a typical system such as a PC using the communication method of RS-232. .

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the TTCN-3 core language-based test apparatus for testing the suitability of the sub-support for the DLMS / COSEM protocol according to the present invention and a test method using the same.

2 is a block diagram illustrating a TTCN-3 core language based test apparatus for testing suitability of a sub-station supporting the DLMS / COSEM protocol according to the present invention.

2, the test apparatus 100 according to the present invention includes a compiler module 110, a processor module 120, an encoding module 130, a communication interface module 140, and a decoding module 150.

The compiler module 110 generates an executable file by compiling a source written in a Testing & Test Control Notation version 3 (TTCN-3) core language including a test item. Preferably, the source includes a test item for performing a test, and the executable file generated from the source may include test data about the test item.

The TTCN-3 core language is described in detail as follows.

The TTCN-3 core language is an international standard test language standardized by the European Telecommunications Standards Institute (ETSI) in 2001. It is a test language that can standardize various tests through various communication interfaces. The TTCN-3 core language has most of the functionality of the TTCN-2 core language, with a modified representation.

Specifically, the TTCN-3 core language can write a test case for performing a test, that is, a test item created by a user not only in text but also in tables and diagrams, and when performing a test of the MTC (Main Test Component). Dynamic Test Component (PTC) can be generated dynamically. In addition, the TTCN-3 core language supports both synchronous and asynchronous communication and can specify encoding information. In addition, the TTCN-3 core language can use a function specification template as well as a comparison function between data. In addition, the TTCN-3 core language can use the types and values of the grammar used in Abstract Syntax Notation One (ASN.1).

The TTCN-3 core language performs black-box testing, which tests modules, CORBA (Common), as well as conformance testing of test targets to determine whether protocols, including mobile communications and the Internet, are suitable for testing. It can also be used for platform test based on Object Request Broker Architecture (API) and application programming interface (API) test.

That is, the compiler module 110 generates an executable file by compiling a source written in the TTCN-3 core language, which is an international standard test language.

The processor module 120 executes an executable file generated from the compiler module 110.

Specifically, when the executable file generated by the compiler module 110 is executed by the processor module 120, the sub-station 200 may be connected through a display device (not shown) connected to the test apparatus 100 according to the present invention. The test item for testing, the process of performing the test and the result of the test may be displayed.

The processor module 120 may transmit the entirety of the test data about the test item to the encoding module 130 or only the test data about the test item selected by the user to the encoding module 130, and may transmit to the encoding module 130. The test data is encoded by the encoding module 130.

The encoding module 130 encodes test data regarding the test item. Preferably, the encoding module 130 may encode the test data included in the test item to conform to the DLMS / COSEM protocol.

In detail, the encoding module 130 may convert the test data into HDLC according to the hierarchical structure of the DLMS / COSEM protocol including the application layer, the data link layer, and the physical layer. High-level Data Link Control procedure) is encoded in a frame structure and transmitted to the sub-station 200 through the communication interface module 140.

For example, the encoding module 130 encodes test data having an octetstring into test data having a bitstring to conform to the DLMS / COSEM protocol and transmits the test data having the bitstring to the sub-station 200 through the communication interface module 140. ) Can be sent.

The communication interface module 140 communicates with the sub-station 200. Specifically, the communication interface module 140 transmits the test data encoded by the encoding module 130 to the sub-station 200, receives the response data from the sub-station 200, and transmits the response data to the decoding module 150.

Preferably, the communication interface module 140 may communicate with the sub-station 200 via RS-232.

The decoding module 150 decodes the response data received from the sub-station 200. Specifically, the decoding module 150 receives and decodes the response data generated by the sub-station 200 through the communication interface module 140 as a response to the encoded test data.

Preferably, the decoding module 150 may decode the response data to suit the processor module 120. For example, the decoding module 150 may decode response data having a bitstring into response data having an octet string or bytestring so as to be suitable for the processor module 120.

The processor module 120 analyzes the response data decoded by the decoding module 150 to generate test result data.

Specifically, the processor module 120 determines whether there is specific data included in the decoded response data, or compares the specific data and the reference data by comparing the specific data and the reference data included in the decoded response data. The test result data may be generated depending on whether the test results match. The reference data may be, for example, response data received from the sub-station 200 in normal operation.

For example, when the specific data included in the decoded response data exists or compares and compares the specific data included in the decoded response data with comparison data, the processor module 120 determines that the sub-station 200 has a DLMS / Test result messages can be generated that are suitable for communication using the COSEM protocol.

On the other hand, when the specific data included in the decoded response data does not exist or does not match by comparing the comparison data with the specific data included in the decoded response data, the processor module 120 determines that the sub-station 200 has a DLMS. You can generate test result messages indicating that they are not suitable for communication using the / COSEM protocol. The test result message generated by the processor module 120 may be displayed through the display device.

Accordingly, the user may determine whether the sub-station 200 is suitable for the DLMS / COSEM protocol based on the test result message generated from the processor module 120.

Hereinafter, a test method using the test apparatus according to the present invention will be described in detail.

3 is a flowchart illustrating a test method for testing suitability of a sub-station supporting the DLMS / COSEM protocol according to the present invention.

Referring to FIG. 3, an executable file is generated by compiling a source written in a TTCN-3 core language including a test item (S110). The compiler module compiles the source to generate an executable file, and the generated executable file is executed through the processor module. The source may include a test item for testing a rich station, and an executable file generated from the source may include test data about the test item.

Next, test data about the test item included in the executable file is encoded and transmitted to the sub-station (S120). Specifically, the processor module may transmit the entirety of the test data about the test item to the encoding module, or may selectively transmit the test data about the test item to the encoding module. The encoding module encodes the test data received from the processor module to conform to the DLMS / COSEM protocol and transmits the test data to the sub-station through a communication interface module.

Next, the response data received from the sub station is decoded (S130). The decoding module receives and decodes response data from the sub-station in response to the encoded test data via the communication interface module.

Next, test result data is generated by analyzing the decoded response data (S140). Specifically, the processor module determines whether there is specific data included in the decoded response data, or compares the specific data with the comparison data by comparing the specific data included in the decoded response data with the comparison data. The test result data may be generated according to whether or not.

The test result message generated by the processor module may be displayed through a display device, and a user may determine whether the sub station is compliant with the DLMS / COSEM protocol based on the test result data.

Although the configuration of the present invention has been described in detail, these are merely illustrative of the present invention, and various modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. This will be possible.

Therefore, the embodiments disclosed in the present specification are intended to illustrate rather than limit the present invention, and the scope and spirit of the present invention are not limited by these embodiments. It is intended that the scope of the invention be interpreted by the following claims, and that all descriptions within the scope equivalent thereto will be construed as being included in the scope of the present invention.

1 is a block diagram showing a communication system between a main station and a sub-station according to the prior art.

2 is a block diagram illustrating a TTCN-3 core language based test apparatus for testing suitability of a sub-station supporting the DLMS / COSEM protocol in accordance with the present invention.

3 is a flow chart illustrating a test method for testing suitability of a sub-station supporting the DLMS / COSEM protocol in accordance with the present invention.

<Description of the symbols for the main parts of the drawings>

100: test device 110: compiler module

120: processor module 130: encoding module

140: communication interface module 150: decoding module

200: rich country

Claims (7)

In the test device based on the TTCN-3 core language for testing the suitability of the sub-station supporting the DLMS / COSEM protocol, A compiler module for compiling source written in the TTCN-3 core language including test items; A processor module for executing an executable file generated by the compiler module; An encoding module for encoding test data relating to the test item included in the executable file to conform to the DLMS / COSEM protocol; A communication interface module which transmits the test data encoded by the encoding module to the sub-station, and receives the response data transmitted by the sub-station; And Decoding module for decoding the response data received through the communication interface module &Lt; / RTI &gt; And the processor module analyzes the response data decoded by the decoding module to generate test result data. The TTCN-3 core language based test apparatus for testing suitability of a sub-station supporting the DLMS / COSEM protocol. The method of claim 1, And the processor module compares the response data with the reference data to generate the test result data. The test module of the TTCN-3 core language based test apparatus for testing suitability of a sub-station supporting the DLMS / COSEM protocol. The method of claim 1, The processor module is a test device based on the TTCN-3 core language for testing the suitability of the sub-station supporting the DLMS / COSEM protocol, characterized in that for executing the test data for the test item included in the executable file. The method of claim 1, The communication interface module is a test device based on the TTCN-3 core language for testing the suitability of the sub-station supporting the DLMS / COSEM protocol, characterized in that the communication with the sub-station via RS-232. The method of claim 1, The encoding module is a test device based on the TTCN-3 core language for testing the suitability of the sub-station supporting the DLMS / COSEM protocol, characterized in that for encoding the test data in the HDLC frame structure. In the test method for testing the suitability of a sub-station that supports the DLMS / COSEM protocol, (a) compiling a source written in a TTCN-3 core language including a test item to generate an executable file; (b) encoding test data related to the test item included in the executable file to conform to the DLMS / COSEM protocol and transmitting it to the sub-station; (c) decoding the response data received from the sub-station; And (d) analyzing the decoded response data to generate test result data Test method for testing the suitability of the sub-station supporting DLMS / COSEM protocol comprising a. The method of claim 6, The step (d) comprises the step of comparing the decoded response data and the reference data to generate the test result data, the test method for testing the suitability of the sub-station supporting the DLMS / COSEM protocol.

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