JPH0215751A - Connection repeater - Google Patents

Abstract

PURPOSE:To accept a transmission request from a host side line or network side line in real time by providing the 1st and 2nd line processing sections and an inter-processing section communicating section and directly connecting the line processing section, the transmission request of which is detected, to the line of an apparatus which is an object for reception. CONSTITUTION:When a transmission request to a host computer 6 is produced from one terminal equipment 3, the terminal equipment 3 outputs a connection request between a node 2 corresponding to the terminal equipment 3 and the node 2 of a connection repeater 4 to the corresponding node 2. Upon detecting request, the 2nd line processing section 7 monitoring a network side line 1 outputs a connection request to an inter-processing section communicating section 8. Then the section 8 confirms whether or not the host computer 6 is in a receivable state through the 1st line processing section 9. When the host computer 6 is receivable, the 2nd line processing section 7 detects the state and the terminal equipment 3 is connected with a host side line 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a connection relay device used when connecting a line on the host side and a line on the network side.

(Prior art) When connecting a line on the host side and a line on the network side, it is possible to convert the file format or code between the terminal device or host computer using a connection relay device, etc. Many are designed to eliminate the load on terminal devices and host computers.

FIG. 4 is a block diagram showing an example of a system using such a connection relay device.

The system shown in this figure is based on the number of times that make up the network.
A (network side line) 101, a plurality of nodes 102 connected to this network side line 101, a terminal device 103 connected to each of these nodes 102, and a connection relay connected to one of the nodes 102. device 104
and the connection relay device 10 via the host side line 105.
4 and a host computer 106 connected to the computer.

The host computer 10 at one of the terminal devices 103
When a transmission request for 6 occurs, this terminal device 10
3 is a route of terminal device 103→node 102→network side line 101→node 102→connection relay device 104, and the connection relay device t104 is inquired as to whether the host computer 1.06 can receive data.

At this time, if the host computer 1.06 is capable of receiving data, the terminal device 103 will receive the terminal device 103→node 10.
The file is transmitted through the following route: 2→network side line 101→node 102→connection relay device Ze 104→host side line 1-05→host computer 106.

Conversely, when the host computer 106 receives a transmission request for the terminal device 103 ], the host computer 106 can receive the terminal device ]03 via the host side line 105 to the connecting relay device 104. If the target terminal device 103 is capable of receiving data, the host computer 106 connects the host computer 106 → host side line 1o5 → connection relay device 104 → node 102 → network side line 8101 → node 102. →The file is sent to this terminal device 1073 via the path named terminal device 103.

By the way, the connection relay device i 104 used in such a system is conventionally classified into one type of one-task type and one of two-task type.

The former is connected to the host side line 1 as shown in Figures 5(a) and (b).
05 and the network side line + 01 are crossed I7. When a transmission request is supplied from any of these lines 1.01.105, it checks whether the receiving side can receive it, and when it can receive it, the sending side equipment and the receiving side equipment are connected. When the transmission is completed, the host side line 105 and the network side line Lot are disconnected and the state returns to the initial state.

The latter includes a first line processing unit 107 that monitors the host side line 105 and a network side line 1 as shown in FIG.
0, and when a transmission request is supplied from the host side line, the first line processing unit 107 detects this and sends the request to the network via the second line processing unit 108. Side entrance 4! This is to check whether the terminal device 103 connected to O1 to receive data is capable of receiving data. When this terminal device is capable of receiving data, the first line processing unit 107 receives the file output from the host computer 106. This is sent to the network side line 101 via the second line processing unit 108 and supplied to the terminal device 103 to be received.

Then, when the transmission operation is completed, the first line processing unit 107
detects this, disconnects from the second line processing section 108, and ends the transmission operation.

Conversely, when a transmission request is supplied from the network side line 101, the second line processing unit 108 detects this and checks whether the host computer 1.06 can receive the request via the first line processing unit 107. When the host computer 106 is able to receive the file, the file output from the terminal device δ103 is sent to the second line processing unit 10.
8 and supplies it to the host computer 106 via the first line processing section 107.

Then, when the transmission operation is completed, the second line processing section 10
8 detects this, disconnects from the first line processing section 108, and ends the transmission operation.

However, such a conventional connection relay device 6104
There were problems as described below.

First, in the one-task method, the connection relay device 10
4, the host controller PA i O5 and the network side line 101 are monitored alternately at regular intervals.
These host side lines 105 and network side lines 101
There was a problem in that it was not possible to accept transmission requests from in real time.

Next, in the two-task method, the host side line 105
Although it is possible to accept transmission requests from the network side line 1.01 in real time, the first and second line processing i'? II L O7,
108, there was a problem in that it took a long time to send the file due to the amount of time required to receive the data.

(Object of the Invention) The present invention has been made in view of the above circumstances, and is capable of receiving transmission requests from a host side line or a network side line in real time, as well as transmitting and receiving data within a connection relay device. It is an object of the present invention to provide a connection relay device that can omit operations and thereby speed up file transfer.

(Summary of the Invention) In order to solve the above-mentioned problems, the connection relay device according to the present invention includes a first line processing section, a second line processing section, and an inter-processing section communication section. The line processing unit that detected the transmission request is directly connected to the line of the device to be received, forming a communication path from the transmission side line to the line processing unit that received the transmission request to the reception side line.

(Example) The present invention will be described in detail below based on the illustrated example.

FIG. 1 is a block diagram showing an example of a system using an embodiment of a connection relay device according to the present invention.

The connection relay device shown in this figure includes a line (network side line) 1 that constitutes a network, a plurality of nodes 2 connected to this network side line 1, and a terminal device 3 connected to each of these nodes 2. A connection relay device 4 connected to one of the nodes 2, and a host computer 6 connected to the connection relay device 4 via a host side line 5.
It is equipped with

The network side line 1 constitutes the backbone communication network of this system, and a plurality of nodes 2 are connected to it.

Each node 2 connects and disconnects between the network side line 1 and each device, and each node 2 has each terminal device 3 and connection relay table r! , 4 is 1 to 1
connected with.

Each terminal device 3 is equipped with a keyboard, a CRT, a processing device, etc., and receives processing requests from the host computer 6 via the network side line 1, and transmits processing results to the host computer 6 side.

The host computer 6 is the central computer of this system, and is connected to the connection relay device 4 via the host side line 5, and requests processing to each terminal device 3 via the connection relay device 4. or receive the contents processed by each of these terminal devices 3.

The connection relay device 4 has a first line processing section 9 as shown in FIG.
, a second line processing section 7, and an inter-processing section communication section 8, and when a transmission request is received from the terminal device 3 or the host computer 6, the transmission target side and the reception target side are connected. Connect.

The first line processing unit 9 is a circuit connected to the host computer 6 via the host side line 5, and monitors the host computer 6 and responds when there is a transmission request from the host computer 6. When it is detected and the inter-processing unit communication unit 8 is notified that there is a transmission request, and when the inter-processing unit communication unit 8 gives permission for connection, as shown in FIG. 3(a).
As shown in the figure, it is directly connected to the network side line 1. Then, it receives the file supplied from the host computer 6, performs code conversion on this file, and sends the conversion result directly to the network side line 1. Thereafter, when this transmission operation is completed, the first line processing section 9 detects this and returns to the initial connection state.

Further, the second line processing unit 7 is a circuit connected to the terminal device 3 side via the network side line 1, and monitors the network side line 1 and when there is a transmission request from each terminal device 3. , this is detected and the inter-processing unit communication unit 8
When the inter-processing section communication section 8 notifies that there is a transmission request, and also receives connection permission from the inter-processing section communication section 8, it is directly connected to the host side line 5 as shown in FIG. 3(b). Then, it receives the file supplied from the terminal device 3, and while converting the code of this file, directly sends the conversion result to the host computer 6 via the host side line 5. Thereafter, when this transmission operation is completed, the second line processing section 7 detects this and returns to the initial connection state.

Further, the inter-processing unit communication unit 8 includes the first and second line processing units 9.
When it is detected that there is a transmission request by either of 7, it checks whether the receiving target device can receive the data via the other line processing unit, and if it can receive it, the line processing unit that received the transmission request is allowed to connect. The device is connected to the line on the side of the device to be received.Thereby, the line processing section directly connects the device on the sending side and the device on the receiving side.

Next, the operation of the entire system in this embodiment will be explained.

First, in one of the terminal devices 3, the host computer 6
When a transmission request is generated, this terminal device 3 issues a connection request between this node 2 and the node 2 of the connection relay device 4 to the corresponding node 2.

Here, if the host computer 6 is in a state where reception is not possible due to reasons such as being currently stopped or communicating with another terminal device 3, the node 2 detects this and notifies the terminal device 3 that connection is not possible. Do the following.

Also, if the connection between these nodes 2 is successful.

The terminal device 3 inquires of the connection relay device 4 whether the host computer 6 can receive data through the route: terminal device 3 → node 2 → network side line 1 → node 2 → connection relay device 4.

Then, when the second line processing section 7 that monitors the network side line 1 detects this and issues a connection request to the inter-processing section communication section 8, this inter-processing section communication section 8 connects to the first line processing section. 9
Check whether the host computer 6 can receive data via the host computer 6.

Here, if the host computer 6 is unable to receive data, the second line processing unit 7 detects this via the inter-processing unit communication unit 8 and notifies the terminal device 3 that connection is not possible.

Further, if the host computer 6 is capable of receiving data, the second line processing section 7 detects this and connects to the host side line 5.

Next, the terminal device δ3 that issued the transmission request transfers the terminal device 3→
When a file is transferred through the route Node 2 → Network side line 1 → Node 2 → Second line processing unit 7 of connection relay device 4, the second line processing unit 7 takes in this file and performs code conversion, etc. While processing, the processing results are sent to the host computer via the host side line 5→host computer 6.

When the file transfer is completed, the second line processing section 7 detects this and disconnects the host side line 5 to return to the initial connection state.

Conversely, when a transmission request to one of the terminal devices 3 occurs in the host computer 6, the host computer 6 transmits a designated terminal connection request to the connection relay device 4 via the host side line 5.

As a result, the connection relay device 4 issues a connection request to the node 2 to which the terminal device 3 designated as the node 2 of its own station is connected. When the connection between these nodes 2 is successful, the connection relay device 4 issues a connection request to the terminal device 3 via these nodes 2, and activates the file reception processing section of this terminal device 3.

After this, if this file reception processing section outputs a connection response, the connection relay device 4 detects this and connects the network side line 1.
directly connected to. Thereafter, when the host computer 6 outputs a file, the first line processing section 9 takes in this file, performs processing such as code conversion, and directly transmits the processing result to the terminal bag 613 side.

Further, in the above-described operation, if the connection between the nodes 2 fails, the connection relay device 64 notifies the host computer 6 that the connection is not possible and cancels the connection process.

Thereafter, when the file transfer is completed, the first line processing section 9 detects this and disconnects the network side line 1 to return to the initial connection state.

As described above, in this embodiment, the first line processing section 9,
Since the second line processing section 7 individually monitors the host side line 5 and the network side line 1, even when there is a transmission request from the host computer 6, there is also a transmission request from each terminal device 3. This can also be detected in real time.

Furthermore, in this embodiment, during file transmission, the line processing units (first line processing unit 9,
Alternatively, since the second line processing section 7) is directly connected to the network side line 1 and the host side line 5, the amount of communication between the second line processing section 9.7 is significantly reduced. As a result, it is possible to speed up file forwarding, and it is also possible to simultaneously transfer files in both directions.

(Effects of the Invention) As explained above, according to the present invention, it is possible to receive transmission requests from the host side line and the network side line in real time, and the data exchange operation within the connection relay device is significantly reduced. This can speed up file transmission.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a system using an embodiment of the connection relay device according to the present invention, FIG. 2 is a detailed block diagram of the connection relay device shown in FIG. 1, FIG. 3(a), (
b) is a schematic diagram for explaining an example of the operation of the connection relay device shown in FIG. 2, FIG. 4 is a block diagram showing an example of a general host computer system, and FIGS.
) are block diagrams showing an example of a one-task type connection relay device used in the host computer system shown in Fig. 4, and Fig. 6 is a block diagram showing an example of a two-task type connection relay device used in the host computer system shown in Fig. 4. FIG. 2 is a block diagram illustrating an example of a relay device. 1... Second line (network side line), 3... Equipment (terminal device), 5... First line (host side line),
6... Equipment (host computer), 7... Second line processing unit, 8... Inter-processing unit communication unit, 9... First line processing unit. Patent applicant: Toyo Tsushinki Co., Ltd.

Claims (1)

[Claims] (1) A first line processing unit that detects when a transmission request is received from a device connected to the first line, and a first line processing unit that detects when a transmission request is received from a device connected to the second line. When the second line processing unit and either the first or second line processing unit detect that there is a transmission request, it is checked via the other line processing unit whether the device to be received can receive data, and it is possible to receive the data. In this case, the system is equipped with an inter-processing unit communication unit that connects the line processing unit receiving the transmission request to the line of the device to be received, and directly connects the sending device and the receiving device using this line processing unit. A connection relay device characterized by: