JPH04289946A - Collection/distribution repeater system - Google Patents

Abstract

PURPOSE:To reduce the burden on a terminal processing of a host. CONSTITUTION:This collection/distribution repeating system of a network system is constituted of a host 1, and a terminal A3 and a terminal B4 for executing transmission and reception of data, and a collection/distribution device 2 which is placed between the host 1, and the terminal A3 and the terminal B4 and concentrates and allots the transmission and reception of the data, and the collection/distribution device 2 processes logically connections CON1, CON2 and disconnections DSL1, DSL2 by each terminal of the terminal A3 and the terminal B4 and accesses MSG1, MSG2 of the transmission and reception of the data, as the connection INIT and the disconnection TERM as one terminal, and the accesses MSG1, MSG2 of the transmission and reception of the data, and processes logically the access of each terminal as the access of one terminal.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network comprised of a host and a group of terminals, and more particularly to a collection, distribution, and relay system.

0002

[Prior Art] Conventionally, in this type of concentrating and distributing relay system, even if there is only one physical host line between the host and the concentrating and distributing device, the host and individual terminals are logically connected, and the host is It is connected to multiple terminals.

0003

[Problems to be Solved by the Invention] As mentioned above, in the conventional collection and distribution relay system, even if there is only one physical host line, the host deals with individual terminals that are logically connected. Therefore, the disadvantage is that it places a heavy burden on the host.

An object of the present invention is to solve the above-mentioned drawbacks by logically processing accesses from individual terminals as accesses from one terminal when a host and a group of terminals are collected and distributed by a collection and distribution device. The purpose of the present invention is to provide a collection, distribution, and relay system that reduces the burden of terminal processing on a host.

[0005]

[Means for Solving the Problems] The collection and distribution relay system of the present invention is composed of a host and a group of terminals that transmit and receive data, and a collection and distribution device that is located between the host and the group of terminals and that collects and distributes the data transmission and reception. In the collection/distribution relay method of a network system, by logically treating a group of terminals in the collection/distribution device as one terminal with respect to the host, each terminal in the terminal group can access the host for connection/disconnection and data transmission/reception. Processing is performed as access for connection/disconnection and data transmission/reception to the host by one terminal, and accesses by individual terminals are logically processed as accesses by one terminal.

[0006]

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

FIG. 1 is a block diagram of a network system using a collection, distribution, and relay system according to an embodiment of the present invention, and a diagram showing instructions between each device. FIG. 1(a) is a block diagram of the network system, and FIG. b) is a diagram showing instructions between each device.

In FIG. 1, the network system using the collection and distribution relay method of this embodiment is a network system consisting of a host 1, a collection and distribution device 2, and a group of terminals (terminal A3 and terminal B4). and the collection/distribution device 2 are connected by a host line 5, and the collection/distribution device 2 and the terminal A
3 and terminal B4 are connected by line 6 and line 7.

First, when the terminal A3 sends a connection request (CON1) to the host 1, the concentrator and distribution device 2 sends a connection request (INIT) to the host 1.
Host 1 and collection/distribution device 2 are logically connected to terminal A3.
is logically connected to the host 1 via the collection and distribution device 2. Then, message (MSG1) data is exchanged between the host 1 and the terminal A3 according to a series of tasks.

Next, when terminal B4 sends a connection request (CON2) to host 1, since terminal A3 is logically connected to the host, concentrator and distribution device 2 indicates that the line is busy (BUSY). A reply is sent to terminal B4, and the connection of terminal B4 is put on hold.

Next, when the terminal A3 issues a disconnection request (DIS1) to the host 1, the terminal A3 is logically disconnected from the collection and distribution device 2. On the other hand, the terminal B4, whose connection has been suspended, is logically connected to the host 1 via the concentrator and distribution device 2. Then, message (MSG2) data is exchanged between the host 1 and the terminal B4 in accordance with a series of tasks.

Finally, when the terminal B4 sends a disconnection request (DIS2) to the host 1, the concentrator and distributor 2 sends a disconnection request (TERM) to the host 1, and the host 1 and the concentrator and distributor 2 are connected. The terminal B4 is logically disconnected from the host 1 via the collection and distribution device 2. During this time, the host 1 logically treats the collection and distribution device 2 as one terminal, and the two connection/disconnection and data transmission/reception accesses by terminal A3 and terminal B4 are replaced by one connection/disconnection and data transmission/reception access by the collection and distribution device 2. This is access for sending and receiving.

FIG. 2 is a block diagram of a concentrating and distributing device of the network system shown in FIG.

It consists of a gateway control section 9 that manages communications (protocol control, etc.) between the host and terminals A and B, and a relay control section 8 that selects connections between the host and terminals A and B.

[0015] Then, the relay control unit 8 connects the host and the terminal A.
, B, while the connection between the host and the other terminal is being disconnected. That is, only one terminal can access the host for data transmission and reception at any time.

[0016]

[Effects of the Invention] As explained above, the collection and distribution relay method of the present invention logically processes accesses from individual terminals as accesses from one terminal when a host and a group of terminals are collected and distributed by a collection and distribution device. This has the effect of reducing the burden of terminal processing on the host.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a network system using a collection, distribution, and relay system according to an embodiment of the present invention, and a diagram showing instructions between devices. FIG. 1(a) is a block diagram of a network system. FIG. 1(b) is a diagram showing commands between each device.

FIG. 2 is a block diagram of a collection and distribution device of the network system in FIG. 1;

[Explanation of symbols]

1 Host 2. Collection and distribution device 3 Terminal A 4 Terminal B 5 Host line 6 Line 7 Line 8 Relay control section 9 Gateway control section

Claims (1)

[Claims] 1. A collection and delivery relay method for a network system comprising a host and a group of terminals that transmit and receive data, and a collection and delivery device that is located between the host and the group of terminals and collects and distributes the data transmission and reception. By logically treating the terminal group as one terminal with respect to the host in the concentrating and distributing device, connection/disconnection to the host and access for data transmission/reception by individual terminals in the terminal group are controlled by the one terminal. A collection and distribution relay system characterized in that the connection/disconnection to the host and the data transmission/reception accesses are processed as accesses, and accesses of individual terminals are logically processed as accesses of one terminal.