KR970008912B1 - Method and apparatus for protocol testing in the remote protocol testing apparatus - Google Patents

Abstract

None.

Description

Protocol Tester and Test Method in Remote Protocol Tester

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

2 is a block diagram of a protocol test apparatus using a variable timer according to the present invention;

3 is an operation flowchart of a protocol test apparatus using a variable timer according to the present invention;

4 is an operation flowchart of a scheduler using a variable timer according to the present invention.

* Explanation of symbols for main parts of the drawings

31: output matching processing unit 32: input matching processing unit

33: command response storage unit 34: transmission and reception scheduler unit

35: transmission and reception and communication line control unit

According to the present invention, when a protocol test is to be performed with a plurality of control points (PCOs) as in the B-ISDN protocol, each of the implementation under test (IUT) is tested. The present invention relates to a protocol test apparatus and a test method in a remote protocol test apparatus capable of remotely controlling events (protocol primitives and protocol data units) occurring frequently on a control observation point.

Until now, a widely used method for testing many protocols, such as the Open Systems Interconnection (OSI) protocol, is a remote test method. In this remote test method, the protocol tester has a specified test item and sends a set of protocol data units for each test item to the test object implementation, and the test object collects and analyzes the response according to the sub-layer of the test object implementation. Thus, it was determined whether the test object implementation was implemented in accordance with the standard protocol specification.

In this method, since the implementation object is tested only by the test data unit applied by the tester, there are a lot of difficulties in testing the protocol to start the actual test object implementation. That is, only the implementation of the protocol could be tested for the proper operation of the command of the upper layer and for the proper implementation of the protocol except for the report operation to the upper layer.

However, recently, a protocol test method for comprehensively testing in a tester by placing two PCOs in the upper / lower layers has been proposed. However, the difficulty in the implementation of this method is that the implementation must have a communication interface for communicating with the tester, and a control protocol capable of bidirectional mode communication is basically required to simultaneously handle the control and observation of the protocol. In addition, the actual implementation and commercialization are not made due to the fact that it should be possible to implement as a simple test software that does not put a burden on the test target implementation.

The present invention devised to solve all the problems of the prior art, can be applied to various communication interfaces of the ATM (Asynchronous Transfer Mode) devices currently being developed, and on the operating system (Operatering System) or monitor program of the remote tester Realization of protocol test equipment in economical and efficient remote test equipment by bidirectional mode control of communication using timer that operates with various values according to protocol status and type of protocol data unit for easy implementation The purpose of the present invention is to provide a protocol tester and a test method in a remote protocol tester.

In order to achieve the above object, a configuration of an apparatus embodying the present invention includes a command response storage means for storing / managing a protocol test command and a response: converting a test command from the command response storage means into a test adjustment protocol to a test target implementation Output matching processing means for outputting a command of: input matching processing means for receiving the response of the test object implementation and converting the test protocol back to the command response storage means: connected to the output matching processing means and input matching processing means Transmission and reception scheduling means for operating with a timer value; and transmission and reception and communication line control means connected to the output matching processing means and input matching processing means and connected to an external communication channel.

In the method of the present invention, the first step of extracting a test command from the command response storage means to match the internal test protocol: after performing the first step, the internal test protocol after the state conversion process of the protocol in the output matching unit The second step of performing the encoding of the data unit: After performing the second step, after the transmission process of the protocol data unit, the third step of scheduling the operation of the input / output matching unit by the scheduling means: After receiving the third step, the response reception time If the time limit is exceeded, the first time is returned. If a response to the test is received within the time limit, the protocol state transition according to the internal state is performed and the received structured data is decoded. Match the protocol primitives and store the received response to the command response processor. Were to occur, including a fifth step of to perform said scheduling process.

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

1 is a block diagram showing the connection to the test environment of the B-ISDN protocol, in which 1 is a protocol test management and display device, 2 is a protocol test device, 3 is a protocol test response device, 4 is a protocol test object, 11 represents a B-ISDN protocol remote test apparatus, and 21 represents a B-ISDN protocol test target system.

The protocol test management and display means 1 as shown in the figure extracts a test item to be tested from a storage device and sends a combination of test commands necessary for the protocol test device 2 or the protocol test device 2. Protocol test management and display means for analyzing and displaying the response from the test target implementation stored in the service primitive and protocol data unit and its configuration form on the screen. The protocol test apparatus 2 handles the present invention. A protocol test device for testing, a protocol test response device 3 is a protocol response device mounted on a test object, and a protocol test object 4 is a protocol test object implementation undergoing a protocol test, and a B-ISDN protocol remote test device 11 ) Is a remote test with a built-in protocol control means handled in the present invention The apparatus, and the B-ISDN protocol test target system 21 is a test target system.

In the remote test apparatus of the B-ISDN protocol remote test apparatus 11, a test command protocol data unit input to a test object is converted and encoded by a primitive in the protocol test management and display device 2 and transferred to an implementation object. The protocol test response device 3 receives the decoding process and applies an input to the corresponding control observation point. In response, the test subject implementation may send the response through a plurality of control observations after performing the relevant processing according to the implemented protocol, which is again encoded by the protocol test response device (3) and the protocol test device (2). ), And the protocol test apparatus 2 efficiently receives this response and sends it to the protocol test management and display apparatus 1 so that a series of protocol tests can be performed. Here, the protocol test device 2 and the protocol test response device 3 are connected by a communication channel so that the B-ISDN protocol remote test device 11 remotely establishes the protocol in the B-ISDN protocol test target system 21. It is possible to test the specimen (4).

2 is a block diagram of a protocol test apparatus using a variable timer value in a remote test apparatus. In FIG. 31, a test command is converted from a command response storage unit of the input matching processor 33 into a test adjustment protocol to a test target implementation. Output matching processing unit for sending out a command of 32, 32 is an input matching processing unit for receiving the response of the test object implementation from the transmission and reception and communication line control unit 35, and reverse conversion to the test object protocol, 33 is a command response for storing / managing the test command and response A storage unit, 34 is a transmission / reception scheduler unit operating with a variable timer value, 35 is a transmission / reception and communication line control unit, 31-1 in 31 matches a test target protocol with a related test coordination protocol to promote generalization of the test target. A command received from the transmission message queue 33-7 in the command response storage unit 33 as a protocol matching unit Is converted into a related test coordination protocol service primitive and transmitted to the protocol state transition unit 31-2. The protocol state transition unit 31-2 is a state transition management means of a transmission-side test adjustment protocol and determines the service primitives and related parameters from the protocol matching unit 31-1 as appropriate primitives according to the current protocol state. If so, the encoder 31-3 transmits the service primitive and the parameter, transmits the service primitive, and processes the error if the primitive is not suitable for the current state, and performs the state conversion process for the next operation.

At this time, the information (type of command, type and number of request responses, etc.) in the protocol matching section 31-1 and the information (state of the test adjustment protocol) in the protocol state transition section 31-2 are appropriate timer values. It is used as information for calculating the time and becomes the input of the scheduler 34 by the variable timer.

The encoder 31-3 is a means for encoding a test coordination protocol service primitive and a parameter received from the protocol state transition unit 31-2 into a data unit. A data unit including an identifier of a control observation point, a loopback test, and other information is made and transmitted to the transmission / reception and communication line control unit 35.

The protocol state transition unit 32-4 in the input matching processing unit 32 analyzes the state of the received test response protocol and the received service primitives by analyzing the state of the received test response protocol. Receive processing to (32-5), error processing in case of incorrect or incorrect configuration, and state conversion processing for the next operation.

The decoder 32-5 decodes the response information from the received service primitive, extracts the required information response type, test object implementation identifier, control observation point identifier, loopback information, and other information, and converts the information into a protocol. It passes to the matching part 32-6.

The protocol matching unit 32-6 transfers the received response primitives and related parameters to the service primitives in the target protocol to the received message queue 33-8 in the command response storage unit 33.

The transmission message queue 33-7 in the command response storage 33 is a means for storing / managing test commands from the protocol test management and display device 1 of FIG. 1 in order of occurrence or priority, The reception message queue 33-8 is a means for storing / managing the response from the protocol matching unit 32-6 in order of occurrence or priority to the protocol test management and display device 1 of FIG. Pass it over.

The scheduler 34 by the variable timer is a means for controlling the bidirectional mode of communication with the timer value variable according to the progress of the test by using the input from the output matching processing unit 31. The situations considered here include, for example, the state of the test coordination protocol and the type of command.

There are three types of test coordination protocols: idle state, connection setup wait state, and data transfer possible state.The types of commands can be divided into commands that require a response and commands that do not require a response. Commands that require a response can be broken down by the number of responses.

The transmission and reception and communication line control unit 35 is a physical transmission and reception interface processing means according to the characteristics of the communication channel.

3 is an operation flowchart of a protocol test apparatus using a variable timer according to the present invention. The test command is extracted from the transmission message queue 33-7 of the command response storage unit 33 of FIG. Matching 302 with the test protocol primitives and parameters of the protocol, and then performing a state transition 303 according to the current state of the protocol and the corresponding primitives in the output matching unit (31 in FIG. 2), and transmitting the parameters and test commands as structured data. In order to encode the data, it is encoded 304 and transmitted (305).

The scheduler (34 of FIG. 2) by the variable timer schedules the operation of the input / output matching unit according to the state of the protocol, the type of command, the number of expected responses, and whether the input matching unit has received or not (306).

If a response to the test is received within a given scheduling time, the input matching unit performs a protocol state transition according to the internal state (307), decodes the received structured data (308), matches the command primitive of the protocol under test (309), and then responds to the command. The response received by the reception message queue 33-8 of the processing unit (33 of FIG. 2) is stored, and control is transferred to the input / output scheduler to perform the process 306 or below (310).

If a response is not received within a given scheduling time, the scheduler transfers control to the output matching unit (31 in FIG. 2) to allow the processing of a new test command.

4 is a flowchart showing the operation of the transmission / reception scheduler (34 in FIG. 2) in order to simultaneously handle the control and observation of the protocol in the protocol testing apparatus. The protocol status from the output matching section (31 in FIG. 2) is examined (401). In the idle state (402), α is assigned to the default value (unit: unit time), if the connection establishment standby state (403), β is assigned to the default value, and if the data transmission possible state (404), γ is assigned to the default value (405). The error reporting process 424 is performed for the state of " " and the variable timer is reset (425).

In the idle state and the connection establishment wait state, the type of instruction is investigated 406, and if the instruction 407 related to connection establishment or the instruction 408 related to disconnection is performed, the variable timer processing routine is performed without setting additional values.

For other instructions, the error report process 424 is performed and the variable timer is reset 425.

In the case of a command related to disconnection (409) by assigning γ to the default value (405) and checking the type of the command (406), it is assigned to additional value 1 and t to additional value 2, respectively. (412, 415) to perform the variable timer treatment routine. In the case of a command related to connection control (410), t and c are added to the additional value 1 (413 and 416), respectively, and a variable timer processing routine is performed. In case of a command related to data transmission (411), d is assigned to the additional value 1 (414), the maximum number of responses according to the command is calculated (417), the additional value 2 is assigned (418), and a variable timer processing routine is performed. .

For other types, the error report process 424 is performed and the variable timer is reset 425.

In the variable timer processing routine, the scheduler calculates the timer value using the default value, the additional value 1, and the additional value 2 (419), sets the timer value (420), and examines the discarding of the timer (421). In order to give the next instruction processing opportunity to the output matching processing unit (31 in FIG. 2), it starts again from the beginning. Otherwise, if the completion signal is not received by the reception matching signal (32 in FIG. 32), the reception completion signal is received (step 221), and if it is received again, the variable timer is reset (423) and restarted from the beginning. do.

Therefore, the effects of the present invention as described above are as follows.

The B-ISDN protocol test provides a means to control and observe the upper layer, lower layer, and management layer of the protocol under test so that the operation of the target protocol from each control observation point can be confirmed and controlled by the remote tester. So that more test items can be tested remotely. By simple timer and module configuration, test coordination protocol can be operated in bi-directional communication mode, and the protocol status in the test object implementation can be immediately recognized and controlled by remote protocol test equipment. Depending on the characteristics of the test item, the waiting time for response time can be reduced by operating properly for one or several responses or no response. By scheduling in a simple manner, protocol testers can be easily implemented in a single tasking operating system as well as in a multitasking operating system.

Claims (5)

The B-ISDN protocol is connected to the test target implementation and is connected to the protocol management and display means (1), and the protocol correspondence means of the test object is embedded in the remote test apparatus 11, and thus the characteristics of the test items inputted to the protocol management and display means. A protocol test apparatus of a remote protocol test apparatus for adjusting the progress of transmission and reception of a protocol according to the present invention, comprising: command response storage means (33) for storing / managing protocol test commands and responses: a test command from the command response storage means (33) Output matching processing means for converting the test adjustment protocol to the test target implementation to output the command 31: Input matching processing means for receiving the response of the test target implementation and inversely converted to the test target protocol and sent to the command response storage means 33 (32): It is connected to the output matching processing means 31 and the input matching processing means 32 to change a variable timer value. Transmission and reception scheduling means 34 which is operated in a high and low order; and transmission and reception and communication line control means 35 connected to the output matching processing means 31 and the input matching processing means 32 and connected to an external communication channel. Protocol test apparatus in the remote protocol test apparatus. 2. The protocol matching section (31) according to claim 1, wherein the output matching processing section (31) is connected to the command response storing section (33) and the scheduling means (34) to match a test target protocol with an associated test adjustment protocol. 1): protocol state transition unit 31-2 connected to the scheduling means 34 to perform service transfer and state transition processing of service primitives and related parameters from the protocol matching unit 31-1, and the protocol state And a coding unit (31-3) for encoding the test coordination protocol service primitives and parameters received from the transition unit (31-2) into data units and transmitting them to the transmission / reception and communication circuit control means (35). Protocol tester in the remote protocol tester. The scheduling unit of claim 1, wherein the input matching processing unit 32 is connected to the transmission / reception and communication line control unit 35, and analyzes the received test response by analyzing a state of a receiving side test adjustment protocol and a received service primitive. Protocol state transition unit 32-4 to be transmitted to 34. Decryptor 32-5 which decrypts response information from a service primitive received from protocol state transition unit 32-4. And a protocol matching unit 32-6 which inversely converts the response pyramid and related parameters received from (32-5) into the service primitive in the target protocol, and delivers them to the command response storage unit 33. Protocol test apparatus in the remote protocol test device characterized in that. A test method applied to a protocol test apparatus in a remote protocol test apparatus, the first step (301, 302) of extracting a test command from the command response storage means (33) and matching it with an internal test protocol: After performing the steps 301 and 302, the second step (303, 304) for performing encoding of the internal test protocol data unit after the state conversion process of the protocol in the output matching unit 31: After performing the second step (303, 304) , After the process of transmitting the protocol data unit, schedules the operation of the input / output matching unit by the scheduling means 34. After performing the third step 306, if the response reception time exceeds the time limit, the first step is performed. A fourth step (307, 308): and a fourth step (307, 308) of performing a protocol state transition according to an internal state and decoding the received structured data when a response to the test is received within a time limit. And a fifth step (309, 310) for matching the primitive of the test target protocol, storing the response received by the command response processor 33, and performing the scheduling process. Protocol test method in protocol test apparatus. 5. The method of claim 4, wherein the third step 306 examines the protocol state from the output matching processing unit 31 to assign default values of the idle state, the connection establishment wait state, and the data transfer possible state, and other states. Regarding the error reporting process and resetting the variable timer (401 to 405, 424, 425): After performing the above steps (401 to 404, 424, 425), the type of command is examined in the idle state and connection establishment wait state. Performing a variable timer processing routine without setting additional values, and performing an error reporting process for other commands and resetting the variable timer if the command is related to connection establishment or disconnection related operation (step 406, 408, 424, 425). After executing (401 to 404, 424, 425), if the type of command is a command related to disconnection and connection control, it is allocated twice for each relevant additional value. After calculating the additional value, the expected response number is calculated, and then the additional value is calculated. Then, the variable timer processing routine is performed, and error reporting processing is performed for other types, and the variable timer is reset (409 to 418, 424, 425). Protocol test method in the remote protocol test apparatus, characterized in that.