KR100204056B1 - Method for testing protocol by interrupt in remote tester - Google Patents

Abstract

1. Technical field to which the invention described in the claims belongs

Protocol test method by interrupt in remote tester.

2. Technical Challenges to be Solved by the Invention

Each control observation point is set to the input / output of the layer to be tested in the test target system, and the PDU output from the layer is transmitted to the remote tester through the communication channel, and the PDU generated from the remote tester is used for the communication channel To be set as the input of the layer.

3. The point of the solution of the invention

A first step of setting a communication channel between the remote test and the system under test, a second step of instructing the remote tester to set an observation point of the system under test in a communication state, a third step of performing an actual test, A fourth step of releasing the currently set control observation point when the test of the Nth layer is completed or the test of another layer is required to be performed; And a fifth step of releasing the communication channel.

4. Important Uses of the Invention

Used for the system under test.

Description

Protocol test method by interrupt in remote tester

The present invention relates to a method for testing a device composed of several layers using a remote tester to provide a single service such as a Broadband Integrated Services Digital Network (B-ISDN) protocol.

Until now, the method that has been objectively used for testing various protocols is a remote test method. In this remote test method, a protocol data unit (PDU) is sent according to a predetermined sequence for each test item with a predefined test item in a remote tester, and the corresponding response is confirmed on the test target device.

However, in the case of the B-ISDN protocol consisting of several layers, in order to test the protocol of a specific layer, the protocol test of the lower layer was completely completed and the protocol of the lower layer was considered to be complete. Because the protocol of the upper layer may be wrong, it is not possible to find the cause even if the lower layer protocol is debugged. Therefore, it is necessary to accurately identify the main cause of the error so that debugging can be performed.

As described above, in the conventional technology, only after the protocol of the lower layer has been recognized as complete, it has been forced to test the upper layer. The fact that the test should proceed only in order means that the time required for the test increases with the number of protocol layers. Even if the lower layer test passes, it can not be tested in all cases. It does not prove that

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide a method and apparatus for setting a control observation point on input / output of a layer to be tested, To a remote tester, and to set a PDU generated in a remote tester to an input of the layer using a communication channel.

The present invention is applicable to a test target system having I / O (input / output) capable of bidirectional communication.

1 is a configuration diagram of a test environment using a remote tester to which the present invention is applied,

2 is a block diagram of a system under test by an interrupt according to the present invention;

3A to 3D are flowcharts of a protocol test method by an interrupt according to the present invention

DESCRIPTION OF THE REFERENCE NUMERALS

201: Pole-shaped communication channel controller 202: Observation point controller

203: Test Protocol Data Unit (PDU) distributor 204: Response PDU collector

205: (n + 1) -th layer program 206: n-th layer program

207: (n-1) -th layer program

The present invention is applied to a system having a remote tester and a system under test, and these should have the following functions.

First, the remote tester consists of the following functions.

The first function is an aggressive communication channel controller that controls the communication channel between the remote tester and the system under test. The second function is a test message handler that generates a message necessary for the test of the test object system, generates a message necessary for the test to analyze the response message received from the test object system, and analyzes the response message received from the test object system. The third function is a tester interface that handles the interface between the test message handler and the operator of the remote tester.

The system under test consists of the following functions.

The first function is a non-polar communication channel controller that controls the communication channel between the test target system and the remote tester. The second function is an observation point controller that sets the observation point in the system under test. The third function consists of the protocol of the original function to be tested. At this time, when receiving the test message from the remote tester, the non-polarized communication channel controller transmits the test PUD using the interrupt to the protocol of the test layer through the path of the previously set control observation point, And is transmitted to the passive communication channel through the interruption path through the observation point.

The present invention is applied to the above environment and includes a first step of setting a communication channel between a remote tester and a system under test, a second step of instructing a remote tester to set observation points of the system under test in a communication state, A third step of performing an actual test, and a fourth step of releasing the presently set control observation point when the test of the Nth layer is completed or the test of another layer is required, And a fifth step of releasing the established communication channel between the remote tester and the test target system.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of a test environment using a remote test method.

The inside of the remote tester has a configuration including a tester interface 101, a test program 102, and an aggressive communication channel controller 103. The inside of the system to be tested has a configuration including a test object program 107, an observation point controller 106, and a non-polarized communication channel controller 105. And the remote tester and test apparatus are connected to the communication channel 104.

The tester interface (101) is a function for interfacing between the remote tester and the tester. This function instructs all commands necessary for the test and confirms the test results. The test program 102 is a test subject that actually controls the test target system in the remote tester. The test target program 102 generates a test message according to the instruction of the tester interface 101 and transmits the test message to the positive type communication channel controller 103, Upon receipt of the response via the aggressive communication channel controller 103, the response message is analyzed and transmitted to the tester interface 101, or the test program 102 generates the next test message appropriate for the response message, (103) to the system under test. The positive type communication channel controller 103 is a function for controlling a communication channel with the test target system, and monitors and controls the communication channel setting and releasing functions and the state of the communication channel. The communication channel 104 connects the remote tester and the system under test, and both a logical channel and a physical channel are available.

The non-polarized type communication channel controller 105 monitors and controls the communication channel 104 in a pair with the positive type communication channel controller 103 and controls the communication channel 104 in comparison with the positive type communication channel controller 103 It has a passive function because it has no function of setting or releasing it. The observation point controller 106 receives the observation point related command sent from the remote tester from the non-polarized communication channel controller 105 and sets an observation point at a desired position in the test target system to set a path to the communication channel 104 to be. The test target program 107 is a program of the layer to be tested. The test target program 107 may be composed of one or a plurality of successive layers.

2 is a block diagram of a system under test by an interrupt according to the present invention.

The non-polarized-type communication channel controller 201 is as described above. The viewpoint controller 106 of FIG. 1 specifically includes an observation point controller 202 and a test PDU distributor 203 response PDU collector 204 in the figure.

When the observation point controller 202 receives a command related to the observation point control in the remote tester, the contents related to the input PCO (Point of Control and Observation) are requested to the test PDU distributor 203 for setting, PDU collector 204 to request a setting. When the test PDU distributor 203 receives the PDU related to the protocol test from the remote tester, it confirms the previously set input observation point and sets it as an input of the program of the desired layer. The response PDU collector 204 keeps a predetermined output observation point and sends an acknowledgment PDU to the remote tester through the non-polarized communication channel controller 201 when the response PDU is generated. The (n + 1) th layer 205, the nth layer 206 and the (n-1) th layer are part of the test target program, And the lower layer.

FIG. 3 is a processing flowchart of the test method by the interrupt according to the present invention, and shows the operation of the system under test.

The test method in the present invention follows the following procedure.

The first is the setting of the communication channel (301 to 305). The operator of the remote tester must first establish a communication channel 104 with the system under test. The setting of the communication channel can be set at the tester's interface 101 or automatically at the start of the program of the remote tester. When the remote tester transmits the communication channel setting request 302 PDU to the test target system, the non-polarized communication channel controllers 105 and 201 perform the procedure necessary for the communication channel setting 303. After performing this procedure, the non-polarized communication channel controller 201 replies with the communication channel setting response 304 PDU that the setting of the communication channel is completed. The positive type communication channel controller 103 receives this PDU and becomes the communication state 305. [ In the communication state (305), a test or other purpose PDU can be exchanged between the remote tester and the test target system.

The second is the setting of the control observation point (305, 306, 307, 308, 305). In the communication state 305, the tester of the remote tester instructs to set (202, 203, 204) the observation point of the system under test. The control observation point 202 may be composed of one layer or a plurality of consecutive layers according to the purpose of the test. When the PCO setting request 306 is sent from the remote tester, the observation point controller 202 of the test target system receives the input observation point to the test PDU distributor 203 and sends the output observation point to the response PDU collector 204 to set the PCO (307). When this procedure is completed, the observation point controller 202 requests the non-polarized communication channel controller 201 to send a PCO setup response 308. [ When the aggressive communication channel controller 103 receives the PCO setting response, the control observation point is successfully set.

Third, the actual test is conducted. The test is performed by the test program 102 sending a test message to the aggressive communication channel controller 103 when the tester selects an item according to the menu given in the tester interface 101 and the test message is sent to the communication channel 104 The test PDU distributor 203 and the input of the n-layer 206 in real time by an interrupt according to the path of the already set control observation point. In the n-th layer 206, the program proceeds according to the original purpose without knowing whether the test message is in the test environment or the real environment, and the result is sent to the response PDU collector 204, the non- The test message 102 is transmitted to the test program 102. If the test result is displayed on the tester interface 101 or is a continuous test, the response message is analyzed in the test program 102 and a new test message is automatically generated, Repeat. When receiving the test PDU 309 from the remote tester, the non-polarized communication channel controller 201 sends it to the test PDU distributor 203. The test PDU distributor checks whether the input observation point is set (310), and then checks the comparison (311) with the receive layer of the test PDU (309). If the receiving layer is correct, the test PDU is taken as the n-th layer's input 312. If an error occurs during the reception layer check, it is determined to be an invalid PDU and a test PDU error (313) is sent to the remote tester. If the control observation point is not set, a test PDU error 314 is sent to the remote tester. When the test PDU 312 is received in the N-th layer, the corresponding program operates and the response PDU 315 is output. If the PCO of the response PDU is set 316 in the response PDU collector 204, the source of the response PDU is checked 317. If the source check passes, the response PDU 318 is sent to the remote tester in real time by an interrupt. If it does not pass the origin check of the acknowledgment PDU, an acknowledgment PDU error 319 is generated and forwarded to the remote tester. If the observation point of the response PDU collector 204 is not set, the response PDU 315 is ignored.

The fourth is the release of the control observation point (305, 320, 321, 322). If the n-tier test is completed or if you want to test another tier, you need to release the currently set control observation point. The release of the control observation point is as follows. First, the remote tester sends a PCO release request (320) to the test target system. When the observation point controller receives this request 320, the input observation point release is sent to the test PDU distributor 203 and the output observation point release is sent to the response PDU collector 204, respectively, to release (321) the set observation point . When the observation point is released, the observation point controller 202 sends the PCO release response 322 to the remote tester to complete the control observation point release procedure. Then, if you want to continue testing another layer, you can resume the test by resetting the control observation point to the appropriate location.

The fifth is the release of the communication channel (305, 323, 324, 325, 326, 327). Upon completion of all the test procedures to be tested, the communication channel 104 between the remote tester and the system under test is released. When the remote tester receives the communication channel release request 323, the non-polarized communication channel controller 201 confirms whether the observation point controller 202 has a currently set observation point 324. If there is a set observation point, the observation point set in accordance with the above procedure is released (327). If there is no set observation point, the procedure of canceling the communication channel 325 is performed. If the communication channel is released in the system under test, the communication channel release response 326 is sent to the remote tester so that the state of the communication channel 104 becomes the standby state 301.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. It is not.

The effects of the present invention are as follows.

First, the testing of the test system consisting of several layers like the B-ISDN protocol shortens the test period by independently executing the upper layer independently of the test of the lower layer.

Second, by isolating the lower layer in the upper layer test, errors in the lower layer can be excluded, and when an error is found during the test, it can be actively counteracted.

Third, testing of other layers can be easily performed by changing the control observation point of the test recirculation system in the remote tester.

Fourth, it is possible to easily perform two or more layer tests by changing the control observation point of the system under test in the remote tester.

Fifth, it is possible to test in real time by transferring various PDUs through interrupts.

Sixth, the load required for the test configuration in the test target system is small, so online monitoring is possible during system operation.

Claims (6)

A remote tester having a tester interface 101, a test program 102, and an aggressive communication channel controller 103; A test protocol data unit (PDU) distributor 203, an observation point controller 202, a response protocol data unit (PDU) collector 204, layer programs 205 to 207 , The method comprising the steps of: (a) A first step of setting a communication channel between the remote tester and the system under test, A second step of instructing a remote tester to set an observation point of the test target system in a communication state, A third step of performing an actual test, A fourth step of releasing the currently set control observation point when the test of the N-layer is completed or the test of another layer is required, And a fifth step of, when all the test procedures to be tested are completed, releasing a communication channel established between the remote tester and the system under test. The method according to claim 1, In the first step, A sixth step of performing a procedure necessary for establishing a communication channel in the non-polarized communication channel controller 201 when the remote tester transmits the communication channel setting request PDU to the test target system, A seventh step of responding to completion of setting of the communication channel in the non-polarized communication channel controller 201 with a communication channel setting response PDU, And an eighth step of receiving the response PDU from the aggressive communication channel controller (103) of the remote tester and setting the response PDU to a communication state. The method according to claim 1, Wherein the second step comprises: (PCO) setting request from the remote tester is received by the observation point controller of the system under test and the input observation point is sent to the test PDU distributor 203 and the output observation point is sent to the response PDU collector 204 to the control observation point A sixth step of performing a PCO setting procedure, When the procedure is completed, the observation point controller 202 requests the non-polarized communication channel controller 201 to send a control observation point setting response, and if the response is received, determines that the setting of the control observation point is successful. Protocol test method. The method according to claim 1, In the third step, A sixth step of the test program 102 sending a test message to the aggressive communication channel controller 103 when the tester selects an item according to a menu given in the tester's interface 101, The test message is input to the n-th layer 206 via the test PDU distributor 203 in real time by an interrupt according to the path of the control observation point already established through the communication channel 104; an eighth layer 206 executing a program according to the original purpose and transmitting the result to the test program 102 through the response PDU collector 204 and the pseudo-communication channel controller 201, Upon receiving the test PDU from the remote tester, the non-polarized communication channel controller 201 sends the test PDU to the test PDU distributor 203, The test PDU distributor checks whether the input observation point is set, and then compares the input observation point with the reception layer of the test PDU, An eleventh step of setting the test PDU as an input of the n-th layer if the receiving layer is correct, determining that it is an erroneous PDU if an error occurs in the receiving layer inspection and sending a test PDU error to the remote tester, a step 12 of checking whether the response PDU is generated when the corresponding PDU is received and the PDU collector 204 sets a control observation point PCO of the response PDU, A step 13 of sending an acknowledgment PDU to the remote tester in real time by means of an interrupt, And if the response PDU does not pass the generation test, the response PDU error is transmitted to the remote tester. The method according to claim 1, In the fourth step, A sixth step of sending a control observation point (PCO) release request from the remote tester to the test target system, A seventh step of, when the observation point controller receives this request, releasing the observation point to which the input observation point release is sent to the test PDU distributor 203 and the output observation point release is sent to the response PDU collector 204, respectively, And when the observation point is released, the observation point controller (202) sends a control observation point (PCO) release response to the remote tester to complete the control observation point release procedure. The method according to claim 1, In the fifth step, When the remote tester receives the communication channel release request, the non-polarized communication channel controller 201 confirms to the observation point controller 202 whether there is a currently set observation point, A seventh step of releasing the set observation point if there is a set observation point and performing a release procedure of the communication channel immediately if there is no set observation point; And an eighth step of causing the test target system to send a communication channel release response to the remote tester in response to the release of the communication channel to put the state of the communication channel into a standby state.