JPH0235843A - Protocol converting machine - Google Patents

Abstract

PURPOSE:To utilize a network application function even between computer systems conforming to different network protocols by reading data to express the types of the communication protocols corresponding to an address and converting and outputting packed data based on the network address of the computer system of the other communication party included in the packed data. CONSTITUTION:When a computer system 100 sends the packed data through an LAN controller 110 to the other computer system, a protocol conversion processor 13 analyzes a network address data part included in the data, accesses a memory 14 based on the network address, and reads the data to express the types of the protocols corresponding to the address from the memory 14. The protocol conversion processor 13 converts the packed data to the packed data conforming to the protocol. Thus, even when the protocol of the other communication party is different from that of the computer system 100, the network application function can be utilized.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a CSMA/CD (Carrier
5ense Multiple Access/Co
11ision Detection) Protocol LA
This relates to data transfer equipment used in N.

[Conventional technology]

Conventionally, this type of data transfer equipment, as shown in FIG. 2, includes a LAN controller 201 installed in a computer system constituting a CS MA/CD protocol LAN;
It consists of a transceiver 203 and a transceiver cable 203 that connects these, and packet data output from a computer system is sent as is from the transceiver 203 to a coaxial cable 204.

[Problem to be solved by the invention]

Therefore, when using such data transfer equipment, network application functions such as data transfer can be used between computer systems that support the same network protocol on the same network, but network application functions such as data transfer can be used between computer systems that support the same network protocol on the same network. Protocol LAN network protocols include TCP/IP,
(XNSDECnet, etc.), network application functions cannot be used between computer systems even if they are connected to the same software network.

SUMMARY OF THE INVENTION An object of the present invention is to provide a protocol converter that eliminates the above drawbacks and makes it possible to utilize network application functions even between computer systems that follow different network protocols.

[Means to solve the problem]

The present invention is a protocol converter connected between a computer system and a transceiver that constitute a C3MA/CD protocol LAN, and a storage device that stores data representing the type of communication protocol supported by the computer system of another station. Based on the network address of the communication partner's computer system included in the bucket data from the local computer system, data representing the type of communication protocol corresponding to the address is read from the storage device, and the bucket data is transferred to the communication protocol file. The present invention is characterized by comprising a protocol conversion processing device that converts the data into packet data according to the following and outputs it to the transceiver.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of a protocol converter according to the present invention. This protocol converter 1 is C3
A bucket data input/output device 15 that receives packet data from the computer system 100 that constitutes the MA/CD protocol LAN and transmits bucket data to the transceiver 200, the network address of the communication partner computer system, and the network protocol of this system. a storage device 14 that stores packet data in correspondence with the type of the computer system 100, a protocol conversion processing device 13 that converts packet data from the computer system 100 into packet data according to the communication protocol of the communication partner computer system, and a LAN controller interface unit]1 and a transceiver interface section 12. The LAN controller 110 of the computer system 100 is connected to the transceiver 200 via the interface section 11 through the transceiver cable 120, and transmits data to the coaxial cable (network cable) 300.
The interface unit 12 is connected through a transceiver cable 210 .

Next, the operation will be explained. Prior to data communication with the computer system of another station, the computer system 100 stores data necessary for protocol conversion in the protocol converter 1. That is, the computer system 100 outputs each network address of a plurality of other computer systems serving as communication partners and data indicating the type of network protocol of each system to the protocol converter through the LAN controller 110. The bucket data input/output device 15 receives these data through the transceiver cable 1.20 and the interface section 11, and sends the data to the storage device 14.
Output to. Then, the storage device 14 stores the network address of each computer system received from the interface unit 11 and data representing the type of network protocol in association with each other for each system.

After that, the computer system 100 connects the LAN controller 1
When the bucket 1 data is sent to another computer system through the bucket data input/output device 15, it is temporarily stored in the storage device 14. Then, the protocol conversion processing device 13 reads this packet data from the storage device 14 and analyzes the network address part included in the data. Based on the network address found as a result of this analysis, the protocol conversion processing device 13 accesses the storage device 14 and reads data representing the type of protocol corresponding to the address from the storage device 14. The protocol conversion processing device 13 is a storage device 14
The protocol of the communication partner is recognized from the data read from the storage device 14, and the packet data read from the storage device 14 is converted into bucket data according to the protocol. The bucket data input/output device 15 receives the converted bucket data and outputs it from the interface section 12. Transceiver 200 connects this to transceiver cable 2
A receiver is taken through 10 and output to a coaxial cable 300.

In this way, the protocol converter I is connected to the computer system 100.
Since the packet data from the computer system 100 is converted into packet data that conforms to the protocol of the communication partner's computer system and output, the communication partner's protocol is compatible with the computer system 100.
Network application functions can be used even if the protocol differs from the standard protocol.

〔Effect of the invention〕

As explained above, the protocol converter of the present invention is a C3
A storage device connected between the computer system and transceiver that constitutes the MA/CD protocol LAN, and storing data representing the type of communication protocol supported by the computer system of another station, and packet data from the computer system of the own station. A protocol that reads data representing the type of communication protocol corresponding to the address from the storage device based on the network address of the computer system of the communication partner included in the address, converts the packet data into packet data that conforms to the communication protocol, and outputs it to the transceiver. Equipped with a conversion processing device.

Therefore, by using the protocol converter of the present invention, network application functions can be used even between computer systems that follow different network protocols.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a protocol converter according to the present invention, and FIG. 2 is a block diagram showing a part of a conventional C3MA/CD protocol LAN. ■...Protocol converter 11...LAN controller interface unit 12...Transceiver interface unit 13...Protocol conversion processing device 14...
Storage device 15... Bucket data Personnel equipment Computer system L A N controller transceiver cable transceiver coaxial cable

Claims (1)

[Claims] (1) A protocol converter connected between a computer system and a transceiver that constitute a CSMA/CD protocol LAN, and a storage device that stores data representing the type of communication protocol supported by the computer system of another station. , based on the network address of the communication partner's computer system included in the packet data from the own computer system, reads data representing the type of communication protocol corresponding to the address from the storage device, and the packet data follows the communication protocol. A protocol converter comprising a protocol conversion processing device that converts the data into packet data and outputs the data to the transceiver.