JPS62176347A - Inter-network connection equipment - Google Patents

Abstract

PURPOSE:To attain the connection between plural networks by allowing an inter- network connection equipment to decompose a message into components, extracting a recipient address in the information main body, forming it to a header format of the reception network, writing it to the address part of the message and sending the result to the reception network. CONSTITUTION:The message shown in figure is identified by a transmission/reception means 110 for a network A, fetched in the inter-network connection equipment 1 and sent to a decomposing means 112 for the network A. This message is decomposed into components by a decomposing means 112, an address 42 for a node 2, an address 43 for a node 3 and a message main body 44 are sent to a composing means 114 for a network B respectively. The composing means 114 converts the address 42 into an address 53, an address 43 into an address 53 and an address 44 into an address 53, and address 43 into an address 53 and an address 44 into an address 54 respectively to compose the message. The combined message is sent to a transmission/reception equipment 116 for the network B and sent to the network B. When the message is sent from the network B to the network A conversely, the similar processing is applied by a network B transmission/reception means 116, a network B decomposing means 118, a network A composing means 120 and a network A transmission means.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an inter-network connection device for enabling information to be exchanged between different types of networks.

(Prior Art and Problems) Current networks often have a closed address system set up without considering inter-network connections. Therefore, it has generally been difficult to connect these networks so that messages can be exchanged freely. If we try to do this without changing the current address system, we will have to burden the inter-network connection equipment with an excessive amount of conversion function, which will complicate the configuration of the inter-network connection equipment, making it expensive and taking time to develop. occurs. On the other hand, reconfiguring the address system to make it easier to connect between networks requires a huge amount of work and is extremely difficult for networks that are in operation, and changing the address system when connecting a new network is extremely difficult. The disadvantage is that it becomes necessary again. The present invention solves these problems and provides an inter-network connection device that realizes connections between multiple networks with a relatively simple configuration without making any changes to the conventional network address system.

(Means for Solving the Problems) The inter-network connection device provided by the present invention has three means for each connected network, namely (a) from the connected network (hereinafter referred to as network 1) to (i.e., the main network connection device), and sends the supplied message to the network.
(b) A decomposition means that extracts and outputs at least the embedded address set in the information body part and the information to be transmitted from the message received by the transmitting/receiving means; (e) assembling means for assembling a message to be transmitted to network 1 using the embedded address as the destination address and the supplied information to be transmitted, and supplying it to the transmitting/receiving means corresponding to network 1; It is characterized in that the output of the means is configured to be sent to the assembling means corresponding to the network system of the relay destination.

(Operation) When there are several networks that exchange messages that have two elements: a header part that specifies the recipient address and the main body of information, a network contact point allows any network to send a message to another network. This is made possible by the network connection device according to the present invention located at Although there may be strong restrictions on the format of the header part including the address, the format of the information itself generally has a much greater degree of freedom. The recipient address is written in the information body part, and the address within the network of the network connection apparatus is written in the address part of the message, thereby sending the message to the network connection apparatus. The network connection device receives the message, extracts the recipient address from the information body by means of disassembling the message into its constituent elements, formats it into the header format of the receiving network, and assembles the message from the constituent elements. By writing the address in the message and sending it to the receiving network, the message is delivered to the intended recipient.

(Example) Embodiments of the present invention will be described with reference to the drawings.

The present invention has a few message transfer formats (it can be applied to any network as long as it has two elements, the destination address and the message amount, but here, as a more typical format, in addition to the above two elements, the message sender's An example in which networks having addresses are connected will be described.

FIG. 1(a) shows an embodiment in this case.

1 is an inter-network connecting device located at the contact point between networks A and B.

2 is a WJA node, and 3 is a network B node.

The following explanation assumes that node 2 sends a message to node 3.

The one shown in FIG. 1(b) is from the node 2 to the network connection device 1.
1 (e) is the format of the message sent from the network connection device 1 to the node 3 (that is, at the location 32).

In FIG. 1(b), 41 is the address of network connection device 1 in network A, and 42 is the address of node 2. In FIG. 41.42 follows the address format defined by network A. 43 is the address of the node 3 according to the format determined by the network connection device 1, and 44 is the message body. Message 4 originating from node 2 is sent by the transfer means of network A to address 41, that is, to node 1 of the inter-network connecting device. 1 receives this and converts it into the message shown in FIG. 1(c). 51 is net B made from 43
This is the address of node 3 above.

52 is the address of the network connection device 1 on network B.

52 is known by the network connection device 1 itself. 51.52 follows the network B format. 53 is the address of the node 2 in the format determined by the network connection device 1, which is created from 42. 54 is the message body and is usually 4
It is the same as 4. The message shown in FIG. 1(e) conforms to the format defined by network B and is therefore transferred to node 3 by network B. If either network A or network B or both do not have an originating address, the translation by the inter-network connecting device is of course omitted.

The operation of the network connection device described above is expressed as follows by each component shown in FIG. 1(d).

The message shown in FIG. 1(b) is identified by the mA transmitting/receiving means 110, taken into the network connection device 1, and transmitted to the network A disassembly means 112 via the signal line 111. This message is decomposed into component parts by the decomposition means 112, and the address 42 of node 2, the address 43 of node 3, and the message body 44 are respectively separated from the signal line 1.
13 to the network B assembling means 114. The assembling means 114 converts 42 into 53, 43 into 51, and 44 into 54, respectively, and assembles the message shown in FIG. 1(e). The assembled message is signal line 115
The signal is transmitted to network B transmitter/receiver 116 and sent to network B. Conversely, when a message is sent from network B to network A, network B transmitting/receiving means 116, network B disassembling means 118, and network A
Similar processing is performed by the network A assembly means 120 and the network A transmission means.

As shown in Figure 2 (a), when information is exchanged by an inter-network connecting device located at the contact point of three or more network systems, as shown in Figure 2 (b), which network is the email addressed to? The information identifying the destination address 43
This allows the inter-network connection device 1 to relay the message to the corresponding network.

In FIG. 3(a), an inter-network connection device expanded to be able to transfer messages from network A to network C via network B will be described. Network A is connected to net C via network B by inter-network connecting devices 6 and 7. The message sent from network A has the format shown at 80 in FIG. 3(b). 81
is the address of the network connection device 6, and 82 is the address of the mail sender. 83 is the address 84 of the inter-network connecting device 7 on network B, which is the address of the party included in network C to which the message is to be delivered, and 85 is the main body of the message. The network connection device 6 that received this message 80 creates a message 90 from it. 91 is the address of the network connection device 7 created from 83, and 92 is the address on network B of the network connection device 6 created from 81. 93 is 84
94 is a modified version of the address of the message sender 2 in 82. 95 is the main body of the message to which 85 has been transferred. The inter-network connection device 7 that received the message 90 forwards the received message to 10 in FIG. 3(b).
It is deformed as shown in 0 and sent to net C. This modification operation is the same as that of the network connection device 6. To be specific, 10
1 is the address of the person receiving the message, which is made up of 93. 102 is created from 91. 103 is a modified version of 94, 104 is a modified version of 92, and 105 is a modified version of 95. Here, 81.82 is the format specified by network A. 91.92 is format 1 specified by network B
01.102 is the format specified by Network C, and 83
．． 84.93.94.103.104 is the network connection device 6
．． It follows the format specified by 7. The operation of inter-network connecting devices for transferring messages via two or more networks is similar.

Furthermore, as shown in Figure 4, when two networks are connected by two or more inter-network connecting devices, the burden on the inter-network connecting devices is reduced.
It also prevents the flow of messages from concentrating in one place.

In the explanation so far, only the destination address, sender address, and message body of the message were considered among the elements of the network system, but in general, a message can have many parameters. One method of handling this will be explained using FIG. 5 and FIG. 1. The message at position 22 in FIG. 1(a) has parameters 201 and 202 shown in FIG. 5(a). 201 is a parameter that is valid within network A, and 202 is a parameter that is not supported in network A but is valid in network B. The network connection device receives this message and converts it into parameters 301 and 302 shown in FIG. 5(b). All parameters 202 are placed in parameter 301, and network B is included in parameter 202.
However, valid items should be placed in 301. Parameters 202 that are not supported by WiB are entered into parameters 302.

Furthermore, it goes without saying that this inter-network connection device can also be used as is to connect the same network systems with different address management.

The format of the recipient address set in the information body can be freely determined by the network connection device, but it must be selected from within the range that the network can handle as the medium for the information body. When connecting networks that use non-encoded media such as audio or images as the information body media, specify the recipient address directly in the information body using non-encoded media such as audio or images. If the inter-network connection device has an enhanced function of recognizing and encoding the corresponding media, it is possible to exchange information using the device according to the present invention even between such networks.

As explained above, when using this network connection device, the destination address must be included in the message body, but the network connection device interface 2 that supports this
If 1 or 31 is provided, the effect of the main network connection device will be increased. In this case, the addresses on MI4A and network B of the inter-network connecting device only need to be recognized by the interfaces 21 and 31, so there is no need for those that send and receive messages to be aware of them. This eliminates the need to distinguish between messages sent to the network. It is also naturally possible to support the setting and analysis of the parameters 202 and 302 described above. Furthermore, when a plurality of network connection devices are connected as described above, it may be possible to automatically determine which network connection device is advantageous for message transfer.

(Effects of the Invention) As explained above, according to the present invention, it is not necessary to introduce an artificial address for connection between different types of networks, and therefore the management work and burden on users are fundamentally eliminated. .

Furthermore, the structure of the network connection device can be extremely simplified. Furthermore, the present invention can be applied to network systems that do not take inter-network connections into consideration at all, and the network system can be changed by simply expanding the inter-network connection device nodes and nodes that wish to exchange messages with different networks. It's okay not to.

[Brief explanation of drawings]

FIGS. 1(a), (b), (c), and (d) are diagrams showing an embodiment of the present invention, FIGS. 2(a), (b), and FIG. 3(a),
(b), FIG. 4, FIG. 5(a), and (b) are diagrams for explaining other embodiments of the present invention. In the figure, 1.6.7...Internet connection device, 2.3...Node,
110.116... Transmitting/receiving means, 112.118.
...disassembly means, 114.120...assembly means, Fig. 1 Fig. 1 Cd) Fig. 2 (α) Fig. 3 (α) Fig. 3 (b) θ0 message! 0f 102 tO3101tO,,
5 No. 4 Figure 1 Connection between the two threads 1

Claims (1)

[Scope of Claims] An inter-network connection device for connecting two or more network systems having a function of storing and exchanging information, which includes three means for each connected network, namely (a) connecting network (hereinafter referred to as network 1)
Transmitting/receiving means for receiving a basic unit of information (hereinafter referred to as a message) in which the address of itself (i.e., the main network connection device) is specified from the network 1, and transmitting the supplied message to the network 1; (b) (c) decomposition means for extracting and outputting at least the embedded address set in the information body part and the information to be transmitted from the message received by the transmitting/receiving means; (c) setting the supplied embedded address as the destination address; an assembling means for assembling a message to be transmitted to network 1 from the information to be transmitted and supplying it to the transmitting/receiving means corresponding to network 1; An interconnect device configured to feed the system to an assembly means corresponding to the system.