JPH02166944A - Data transfer protocol converter - Google Patents

Abstract

PURPOSE:To easily perform data transfer between network systems having different data transfer protocols by converting data based on system environment information and line information stored in a filing means and a memory means. CONSTITUTION:The system environment of the network systems A and B are defined in a configuration file 15, and the line information of the network systems A and B are stored in a memory 16. A protocol converter 12 receives transfer data, for example, according to a data transfer protocol A from a system 11, and executes protocol conversion and the transfer control of the data based on the environment information stored in the file 15 and the information for the management of a line, an address and call setting stored in the memory 16, and transfers results to the network system B. In such a way, it is possible to easily perform the data transfer between the network systems having the different data transfer protocols.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a data transfer protocol conversion device, and particularly relates to a data transfer protocol conversion device used for data transfer between network systems having different protocols. .

(Prior Art) Generally, in a network system, a predetermined architecture is defined within the system. Therefore, only systems that follow the same network architecture as this network system can communicate with that network system, and systems that have other architectures cannot communicate. This is because the network system employs a layered protocol, and different data transfer protocols cannot coexist in the same layer. CCITT is already used in the physical layer.
Alternatively, since there are standards standardized by ISO and the like, it is possible to connect various network systems, but since the data transfer protocol is independently determined by each system, it has not been possible to connect using that data transfer protocol layer.

Therefore, in traditional network architecture, when different protocols exist on the same layer,
It was necessary to pass the data to an upper layer and process it into data according to a desired protocol by the upper layer. This has the disadvantage that communication processing becomes complicated.

(Problems to be Solved by the Invention) This invention was made in view of the above-mentioned circumstances, and it improves the difficulty in transferring data between network systems having different data transfer protocols in the past. An object of the present invention is to provide a data transfer protocol conversion device that can easily realize data transfer between network systems having different data transfer protocols.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a data transfer protocol conversion system that is provided between first and second network systems having different data transfer protocols, and that controls data transfer between these network systems. An apparatus, comprising: a file means in which each system environment of the first and second network systems is defined; and a memory means in which information indicating each line state of the first and second network systems is stored;
When a call setup request is issued from one of the first and second network systems to the other, the data stream from the source network system is transferred to the destination network system by referring to the file means and memory means. The method is characterized by comprising means for converting the data into a data stream according to a protocol and controlling transfer of the converted data.

(Function) In this protocol conversion device, for example, transfer data from the first network system is transferred to the second network system based on each system environment information and line information stored in the file means and the memory means. The data is converted into data corresponding to the data and transferred to the second network system.

Therefore, from the perspective of the first network system, it is the same as simply communicating with the protocol conversion device.
It becomes possible to pass the data to the second network system.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a computer network system to which a data transfer protocol conversion device according to an embodiment of the present invention is applied. Reference numeral 11 denotes a system functioning as one node within the network system A, and this system 11 performs data transfer with the protocol conversion device 12 according to the data transfer protocol of the network system A, and also performs logical multiplexing. The protocol conversion device 12 executes protocol conversion between the network system A and the network system 8, and converts a data stream from a transfer source network system into a data stream according to a protocol of a transfer destination network system. 13 and 14 are 1 in network system B, respectively.
It is a system that functions as a node, and a data transfer protocol conversion program exists in the upper layer. These systems 13 and 14 are connected to the protocol converter 12 according to the data transfer protocol of network system B.
Perform data transfer with.

15 is a configuration file in which the system environment of network system A and the system environment of network system B are defined. 16 exists on the protocol conversion device 12, and the network system A,
This memory 16 stores information on each line of B, and this memory 16 stores various information for managing the status of each line, address mapping of the protocol conversion device, and call setting management. The conversion process by the protocol conversion device 12 is executed based on the contents of the configuration file 15 and memory 16.

FIG. 2 is a conceptual diagram of the conversion processing operation of the data transfer protocol conversion device 12. The protocol conversion device 12 receives transfer data according to the data transfer protocol A from the system 11 in units of data transfer, and converts it into a file 1.
Protocol conversion and data transfer based on the environment information defined in 5 and the line, address, and call setting management information (line name, network address A1 network address B1 partner system name) stored in memory 1B. Execute control. For example, transfer data from the system 11 consisting of data transfer protocol conversion information and higher-level data is transferred to network system B with the data transfer protocol conversion information of network system B added as a header. Further, data transfer from network system B to A is performed in the same manner.

Next, the conversion processing operation of the protocol conversion device will be explained with reference to the flowchart of FIG. First, step Sl
Then, the environment of the network systems A and H is set according to the environment information defined in the file 15, and the line is set to a receivable state.

Next, multiple wait processing in step S2 is executed. This is the step in the program that waits for all interrupts and handles physical line, logical line, and system operator interrupts. Next, step S3
The presence or absence of a call setting request from network system A is determined in step S4, and the presence or absence of a call setting request from network system B is determined in step S4.

If a call setup packet is sent from network system A, the data of system A is converted into a protocol for network system B in step S5. If a call setup packet is sent from network system B, the data of system B is changed to the protocol for network system A in step S6.
will be replaced.

The processing in step S5.56 is executed in the following procedure. For example, when a call setup packet is received from the system 11, the other system to which the call should be transferred is determined by referring to the line information table in the memory 16 created from the configuration file 15. If the partner system is not in an operating state, the protocol converter 12 responds to the call setup packet. If it is in operation, it sends the packet to the other system, and the other system returns a response. The call setup packet at this time is transferred as data in network system B. Therefore, although it appears that system 11 is simply communicating with protocol conversion device 12, its data is actually branched to system 13.14, and data transfer is performed according to data transfer protocol B on network B. Processing of transmitted and received data is performed in each system.

Step S7. S8 is a step for determining a termination request and performing termination processing. When a termination request occurs, a termination notification is sent to the logical line and physical line, and all data in the system is cleared.

Therefore, in the present invention, data can be transferred between network systems without changing equivalent operations for nodes within each network system.

Note that this invention relates to a LAN/VAN gateway device,
It can also be applied to switches, protocol converters, and data branching devices.

[Effects of the Invention] As described above, according to the present invention, data transfer processing can be performed within the same layer, and data transfer between network systems having different data transfer protocols can be easily realized.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a computer system to which a data transfer protocol converter according to an embodiment of the present invention is applied, and FIG. 2 conceptually shows a data transfer process executed by the system shown in FIG. 1 and 2 are flowcharts illustrating the conversion processing operation of the protocol conversion apparatus shown in FIG. 12...Data transfer protocol conversion device, 15...
Configuration file, 16...Memory.

Claims (1)

[Scope of Claims] A data transfer protocol conversion device that is provided between first and second network systems having different data transfer protocols and controls data transfer between these network systems, wherein the first and second network systems have different data transfer protocols. a file means in which each system environment of the network system is defined; a memory means in which information indicating each line state of the first and second network systems is stored; and one of the first and second network systems. When a call setup request is generated from one side to the other, the data stream from the transfer source network system is converted into a data stream according to the protocol of the transfer destination network system by referring to the file means and the memory means. 1. A data transfer protocol conversion device, comprising: means for controlling transfer of data.