JPH0244840A - Dynamic connection system for transmission protocol - Google Patents

Abstract

PURPOSE:To switch an opposite with whom final communication is made without being conscious of a transmission protocol by providing transmission protocol conversion means for respective opposite stations. CONSTITUTION:When the opposite with whom communication is to be made finally is previously decided in the case of normal data, an opposite station ai control table 12 is collated, an opposite station aj control table 18 is detected and a data transmission request 20 for an opposite station aj is given to a transmission protocol absorption means cy corresponding to the identification of the transmission means in the opposite station in the opposite station aj control table 18. The transmission protocol absorption means cy gives transmission request adjusted to the transmission protocol with the opposite station aj to a corresponding transmission means by, executes communication corresponding to the transmission protocol and transmits data to the opposite station aj. The transmission protocol absorption means cy maps transmission recognition on the transmission protocol with the opposite station aj to the protocol decided in an inner part and answers 22 data transmission from the opposite station aj to a transmission protocol connection means 3. Thus, communication is attained between two opposite stations.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmission protocol dynamic connection system for data transmission, and more particularly to a transmission protocol dynamic connection system that dynamically switches connections between various transmission protocols.

[Conventional technology]

Conventionally, transmission protocol conversion systems have two types of transmission means to relay between two stations with two different transmission protocols so that the two stations can communicate, and two types of transmission means by converting the transmission protocols. It was possible to transmit data by means of bridging the If two stations with two different transmission protocols have multiple combinations of different transmission protocols, the two stations that convert the transmission protocol and bridge the transmission means are fixedly connected to each other. Data transmission has been performed by converting transmission protocols.

[Problem to be solved by the invention]

The conventional transmission protocol connection method described above establishes a fixed connection between two stations with two different types of transmission protocols, so when connecting two stations with multiple types of transmission protocols, the current connection The drawback is that the partner station cannot be switched to a partner station with a different transmission protocol.

An object of the present invention is to provide a transmission protocol dynamic connection system that improves the above-mentioned drawbacks by providing transmission protocol conversion means for each partner station to enable dynamic switching.

[Means to solve the problem]

The transmission protocol dynamic connection system of the present invention includes a transmitting/receiving means that transmits and receives data to and from a plurality of partner stations through communication lines, a plurality of transmitting means that transfers data to be transmitted and received to the transmitting/receiving means according to respective transmission protocols, and a plurality of transmission protocol absorption means for converting and standardizing different methods of transmission protocols; a data analysis means for analyzing connection data in transmitted and received data; and two sets of different transmission protocol absorption means according to instructions of the connection data. and a transmission protocol connecting means for connecting the two stations, and is configured to dynamically connect two stations that attempt to perform transmission control using different transmission protocols.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

In the figure, the transmission protocol dynamic connection system includes a central processing unit 5 consisting of m transmission means 1, m transmission protocol absorption means 2, transmission protocol connection means 3, and data analysis means 4, It is constituted by a communication control device 7 having a borrowing means 6, and performs data communication with n partner stations 9 via a communication line 8 using various transmission protocols.

The transmitting/receiving means 6 in the communication control unit W7 communicates with the other stations al to a.
In order to send and receive data, data is converted into electrical signals so that they flow through communication lines, and electrical signals are converted into data.

The transmission means b1 to bffi in the central processing unit 5 exchange data according to the transmission protocol agreed with each partner station in order to transmit and receive accurate data with the partner stations a1 to a. , the data received from the partner station 9 is passed to the transmission protocol absorption means 2, and the transmission protocol means 2 requests the data received from the transmission/reception means 6.

Transmission protocol absorption means c1 to cffl are transmission means b1
-b, 11 on a one-to-one basis, and maps requests according to each transmission protocol of each transmission means corresponding to each transmission protocol to an internally determined protocol to absorb differences between different transmission protocols.

Transmission protocol connection means 3 is transmission protocol absorption means 0
The receiver requests the data analysis means 4 to analyze the data received from 1 to C0, and connects or disconnects two partner stations by using the partner station control table based on the analysis response from the data analysis means 4. A request is made to the transmission protocol absorbing means 2 for a transmission protocol between the partner station that is the source of the data and another partner station connected.

The data analysis means 4 analyzes the data received from the transmission protocol connection means 3, determines whether the data is connection request data or other normal data, and sends a reply to the transmission protocol connection means 3.

FIG. 2 is a flowchart showing the flow of data within the central processing unit 5. As shown in FIG.

First, it is assumed that a transmission protocol for communicating with a certain partner station a has been set in advance, and the transmission means bX communicates with the partner station al according to the transmission protocol and receives data from the partner station a1. Uke is taken. The transmission means bX receives and stores the received data in the opposite station aI control buffer (data buffer) 13 connected to the opposite station al control table 12 controlled by the transmission protocol absorption means cX. It is assumed that the transmission means identification has been set in the partner station a1 control table 12 in advance. Thereafter, control is transferred from the transmission means bX to the transmission protocol absorbing means CX, which absorbs the data and information on the partner station, as well as the transmission protocol with the partner station a1.

The transmission protocol absorbing means cX maps different transmission protocols to the protocol 1 determined internally, stores the buffer address of the data part that is not affected by the difference in transmission protocols in the remote station al control table J2, and transfers the transmission protocol to the transmission protocol connecting means. 3, sends a data reception notification 14 from the other station al.

The transmission protocol connection means 3 sends a data analysis request 15 to the data analysis means 4 in order to determine the data of the transmission request. The data analysis means 4 determines, depending on the content of the data, whether the child data is a command requesting connection between two partner stations or other normal data, or if it is a command for connecting two partner stations. The data analysis response 16 is sent to the transmission protocol connection means 3 after determining whether the request is for connection between the other station and the other station. Depending on the answer, the transmission protocol connection means 3 performs the following.

First, data analysis answer] 6 is the answer to the command to connect the partner station a and the partner station aJ. That is the answer to the command 6 to connect the partner station a and the partner station aJ.
1 control table 12 contains the partner station aJ control table 18
Stores the start address of the other station aJ control chifur 18
The start address of the remote control station a and l control chifur 12 is stored in .

In this way, the two stations that will finally communicate are determined.

In addition, in the case of normal data, when the final communication partner has been previously determined, the partner station a and the control table 12 are referred to, the partner station aj control table 18 is found, and the partner station a and the control table A data transmission request 20 to the partner station a is made to the transmission protocol 1 to the protocol absorption means cy corresponding to the transmission means identification of the partner station in 18. As a result, the transmission protocol I/col absorption means C7 requests the corresponding transmission means by to send a transmission request commensurate with the transmission protocols 1 to 1 with the partner station aJ, performs communication according to the transmission protocol, and transmits to the partner station aJ. do. Then, the transmission protocol absorbing means cy confirms delivery on the transmission protocol with the opposite station aJ according to an internally agreed upon protocol, and sends a data delivery response 22 from the opposite station a to the transmission protocol connection means 3. The transmission protocol 1 to the communication protocol connection means 3 that received it finds the connected partner station al control chifur 12 from the partner station aJ control table]8, and sends the transmission protocol absorption means CX to send a response to the partner station. Response 23 for data delivery to partner station al
do.

Furthermore, if the data analysis response 16 from the data analysis means 4 is normal data, and the two stations that will ultimately communicate have not been determined, the transmission protocol connection means 3 determines that communication is not possible and indicates the data transmission request source. A response is sent to the other station al to send data.

As shown in the data flow above, when receiving a command to request connection or disconnection from the other station al at any time,
According to the command, the partner station with which to communicate can be finally determined and communication can be started.

Note that not only does the partner station al decide on the partner station with which it will ultimately communicate, but also the partner station a issues a command to disconnect the other two partner stations. communication.

〔Effect of the invention〕

As explained above, the present invention includes a transmission protocol absorption means corresponding one-to-one to each transmission protocol 1 to transmission means 7 corresponding to the transmission protocol, a transmission protocol connection means for connecting two stations, and a data transmission means 7 in accordance with the transmission protocols 1 to 1 in the central processing unit. By having a data analysis means, it is possible to freely determine and communicate between two stations that will ultimately communicate using any transmission protocol by a connection request command from one side, and it is also possible to disconnect or communicate at any time by a connection request command. This has the effect of finally being able to switch the communication partner without being aware of the transmission protocol.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a flow chart showing the flow of data. 1...Transmission means, 1~b□, 2...Transmission pro 1-
Cor absorption means c1-cm, 3.. Transmission protocol connection means, 4.. Data analysis means, 6. Transmission/reception means, 8. Communication lines, 9.. Partner stations a1-an.

Claims (1)

[Claims] A transmitting/receiving means that transmits and receives data to and from multiple partner stations through communication lines, a plurality of transmitting means that transfers data to be transmitted and received to the transmitting/receiving means according to respective transmission protocols, and a common method by converting different methods of each transmission protocol. a data analysis means for analyzing connection data in transmitted and received data; and a transmission protocol connection means for connecting two sets of different transmission protocol absorption means according to instructions of the connection data. , a transmission protocol dynamic connection method characterized by dynamically connecting two stations that attempt to control transmission using different transmission protocols.