JPH01162456A - Method for verifying protocol - Google Patents

Abstract

PURPOSE:To shorten a manufacturing period by operating a computer in order to execute the verification of the protocol of a high order level with a general purpose standard interface and a link level simulator. CONSTITUTION:When the input of calling is executed from the keyboard of a processor 12, a primitive P1 is given to a high order level 22. The level 22 gives a primitive P2 to a link level simulator 21 and the simulator 21 gives a primitive P3 to a standard interface 32. The data are given from an interface 32 through a transmission cable 3 to an interface 35, the interface 35 gives a primitive P4 to a simulator 51 and the simulator 51 gives the primitive P5 to a high order level 52. The level 52 to receive this recognizes the incoming call, gives a primitive P6 and a processor 15 displays the condition which is the incoming call, at a CRT display device 14. Hereinafter in the same way, the processing, etc., of other phase, etc., are executed and an operator executes the verification of the protocol with a keyboard and a display device.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a method for verifying a communication protocol in communication equipment such as a facsimile machine or a packet switch.

(Prior Art) In recent years, protocols such as O8I have been standardized in a hierarchical manner. When verifying this layered protocol, conventionally, after actually constructing the communication equipment,
For example, a system as shown in Figure 3 was configured and implemented. That is, the constructed terminal (or network side simulator) 2 is connected to the communication control device 1 via the cable 4. The communication control device 1 and the terminal 2 have the same protocol, and this protocol is based on the physical level and data transmission control procedure. The cable 4 is connected to a measuring device 3 such as an online scope, and the communication control device 1 has a keyboard and
A console 5 including a T-display device is connected.

Then, the communication control device 1 receives input from the console 5.
The protocol is verified by operating the terminal 2 and monitoring the signals from communication between the terminal 2 and the communication control device 1 using the measuring device 3, or displaying the information on the console 5.

This method requires that all protocols for the terminal 2 and communication control device 1 be completed. That is, after completing the construction of the physical level and the link level, a procedure must be followed to verify the higher level, resulting in a problem that the production period is long.

(Problems to be solved by the invention) As mentioned above, the conventional protocol verification method involves completing the protocol in the order of physical level, link level, and upper level in order to perform it using actually constructed equipment. There was a problem in that it required a long production period. The present invention was made to solve these conventional problems, and its purpose is to provide a protocol verification method that can independently verify the upper level and thus shorten the production period. It is to provide.

[Structure of the Invention] (Means for Solving the Problems) The present invention is structured in a hierarchical manner consisting of a physical level, a link level for performing data transmission control procedures, and an upper level above this link level. In the protocol verification method for a communication protocol, the physical level is a general-purpose standard interface, and the link level is a link level simulator that sends and receives primitives between the general-purpose standard interface and the upper level, and the link level is installed in a computer together with the upper level. The protocol is verified by having two computers constructed in this way face each other and connected by a cable via the general-purpose standard interface to operate.

(Operation) According to the above configuration, the upper level protocol is verified by operating the computer using the general-purpose standard interface and the link level simulator, so the protocol at the physical level and the link level is completed. You don't have to wait.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration for implementing an embodiment of the method of the invention. In this figure, 11 and 14 indicate CRT display devices, and this CRT display device 11.1
4 are connected to processing units 12, 15 each having a keyboard. Here, a processing device 1 having a keyboard
2.15 is, for example, a microcomputer. The processing devices 12 , 15 are interconnected by transmission cables 13 . The connection between the transmission cable 13 and the processing device 12.15 is a universal standard interface, for example R3.
232C interface 32.35 is used. This R3
The H.232C interface 32.35 corresponds to the physical level of the O3I reference model. Here, the O3I reference model consists of seven layers as shown in the numerical table.

Among these seven layers, the first layer is the physical level, the second and third layers are the link level, and the fourth to seventh layers are the upper level. Here, the link level is a level at which data transmission control procedures are performed. Each of the processing units 12 and 15 includes a link level simulator 21.51 and an upper level simulator 22.52 as software. This allows the CRT
The display device 11 and the processing device 12 function as one communication device, and the CRT display device 14 and the processing device 1
5 acts as another communication device. By operating the keyboard of the processing unit 12.15, each upper level can be accessed, and the processing unit 12.15 can also process primitives, data, etc. sent and received between layers and transmission cables. It is stored in a memory (not shown) as needed, and is also stored in a CRT display device 11.14.
It has a program that displays it in .

The operation of communication and protocol verification using such a system will be explained with reference to FIG. For example, when "call" is entered from the keyboard of the processing unit 12, the primitive P1 is provided to the upper level 22. The upper level 22 is a primitive P to the link level simulator 21
2, and the link level simulator 21 gives R3,23
2C interface 32 Heprimidave P3 is given.

Data is provided from R3232C interface 32 via transmission cable 3 to R3232C interface 35, which provides primitive P4 to link level simulator 51, and link level simulator 51 provides primitive P5 to upper level 52. The upper level 52 that received this “incoming call”
By recognizing the upper level 52 or sending the primitive P6, the processing device 15 displays the CRT display device 14.
display the status ``Incoming call.'' Thereafter, processing in other phases is performed in the same manner, and the operator can verify the protocol using the keyboard and CRT display device 11.14.

As described above, according to this embodiment, it is possible to easily verify the upper level protocol using a general-purpose computer such as a microcomputer without waiting for the completion of the physical level. In this case, the link level simulator 21.
51 to the protocols of various communication devices, and
By preparing many types according to desired standards,
The upper level 22, 52 can perform protocol verification at various levels, and can be applied to various devices such as packet switches and various adapters.

In this embodiment, R3 is used as a general-purpose standard interface.
Although the H.232C interface is used, other interfaces may be used.

Furthermore, although the O3I reference model is shown as a model for protocol standardization, it is not particularly limited.

[Effects of the Invention] As explained above, according to the present invention, a general-purpose standard interface and a link level simulator are used to verify upper-level protocols by operating a computer, so that the verification is completed sequentially starting from the physical level. There is no need,
The production period can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a system for realizing an embodiment of the present invention, FIG. 2 is a block diagram for explaining an embodiment of the present invention, and FIG. 3 is a system using a conventional protocol verification method. FIG. 2 is a block diagram of a configuration example. 11, 14... CRT display device 12, 15.
...Processing device 13...Transmission cables 21, 51...
...Link level simulator 22, 52...Upper level 32, 35...R3232C interface agent
Patent Attorney Book 1) Takashi

Claims (1)

[Claims] In a protocol verification method for a communication protocol layered with a physical level, a link level for performing data transmission control procedures, and an upper level above this link level, the physical level is a general-purpose standard interface, The link level is built into a computer together with the upper level as a link level simulator that sends and receives primitives between the general-purpose standard interface and the upper level, and two computers configured in this way are placed facing each other to connect the general-purpose standard interface. A protocol verification method characterized by verifying a protocol by connecting it with a cable and operating it.