JP2624161B2 - Network address dynamic management device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network address management system for dynamically managing (adding, deleting, notifying and receiving, etc.) network addresses of terminal devices which join / leave a network constituted by a plurality of sub-networks. Related to a security management device.

[0002]

2. Description of the Related Art Conventionally, in a system for managing a network address of a terminal device in a network as described above (network address management system), it is necessary to add or delete a network address to a terminal device that joins or leaves a network. Was done statically. This is because integrated management of the network addresses of all the terminal devices subscribing to the network is performed by a table or the like (tables such as a self-subnetwork terminal address table and another subnetwork terminal address table described later). This is because there is a risk of giving duplicate network addresses.

In other words, in the conventional network address management system, a network address is assigned to a terminal device which is to newly join a network under the management of a network administrator, and a subnetwork is restarted. As a result, the network address becomes valid (this makes it possible for the terminal device to join the network. Such a management form is the same even when the terminal device leaves the network). .

[0004] Also, it has not been performed to automatically notify other terminal devices of information relating to the assignment / deletion of a network address of a certain terminal device (that is, to accept it from the viewpoint of the other terminal device).

Therefore, in communication between terminal devices in such a network, the user of the source terminal device recognizes (acquires) the network address (destination address) of the destination terminal device by some method, and Setting of a destination address in transmission data has been realized. It should be noted that the transmission data transmitted from the transmission source terminal is configured in a format having a transmission source address (network address of the transmission source terminal device), a transmission destination address, and data contents.

[0006]

In the above-mentioned conventional network address management system, network addresses are assigned and deleted statically, so that it is possible to easily join and leave terminal devices to and from the network. However, there is a problem that it is difficult to move and add a terminal device on a network.

[0007] Further, since information regarding the assignment / deletion of a network address of a certain terminal device is not automatically notified to other terminal devices, the recognition of the network address in communication between the terminal devices on the network is not performed. There is a problem that the burden on the user is large.

In view of the foregoing, it is an object of the present invention to enable a terminal device to dynamically join and leave a network by dynamically assigning and deleting a network address. Network address that can automatically notify the other terminal device of the network address (accepting it in view of the other terminal device) and reduce the burden on the user in recognizing the network address in communication between the terminal devices. It is to provide a dynamic management device.

As a prior art relating to network address management, a "network address management control method (Japanese Patent Laid-Open No. 64-27337)" has been disclosed. This prior art is a technique in which a network address management table is provided on a database so that a source terminal device can easily obtain a network address of a destination terminal device, thereby enabling quick communication. However, the present invention is different from the present invention in the following points.

It is not assumed that the present invention is applied to a network constituted by a plurality of sub-networks as in the present invention. Due to this difference in assumptions,
The configuration of the network address management table (network address management table) in the related art differs from the configuration of the network address management table (own sub-network terminal address table and other sub-network terminal address tables) in the present invention. I have.

[0011] Regarding the dynamic deletion of the network address (dynamic departure of the terminal device from the network), the publication relating to the related art does not mention.

In the related art, when a terminal device joins a network, the network address (the network address of the newly joined terminal device) is set in a network address management table. The address is not notified to all terminal devices in the network. On the other hand, the present invention enables such notification.

[0013]

SUMMARY OF THE INVENTION A network address dynamic management device according to the present invention comprises a sub-network terminal address table for managing network addresses of terminal devices in a sub-network, and an affiliation of a terminal in another sub-network. Generate a sub-network terminal address table for managing sub-networks and network addresses, and a network address to be assigned to a terminal device newly subscribed to the own sub-network, and store the network address in the own sub-network terminal address table An automatic address assigning unit, an automatic address deleting unit for deleting a network address for a terminal device that has left the own sub-network from the own sub-network terminal address table, Receiving the "network address of the newly joined terminal device" and controlling the network address to be stored in the other subnetwork terminal address table, and the "network address of the detached terminal device" notified from the other subnetwork. And an automatic address receiving unit for performing control to delete the network address from the other sub-network terminal address table and a network address assigned by the address assigning unit and a network address deleted by the address deleting unit. It performs control to notify terminal devices in the sub-network and transmits the assigned network address and the deleted network address to another sub-network, and receives the “newly added network address” received by the automatic address receiving unit. Between an automatic address notifying unit for notifying a terminal device in the own sub-network of a "network address of a terminal device that has been disconnected" and a "network address of a disconnected terminal device", and input / output between terminal devices in the own sub-network And an input / output control unit for controlling the

[0014]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1A is a block diagram showing the configuration of an embodiment of a network address dynamic management device according to the present invention.

The network address dynamic management device of this embodiment includes an automatic address assigning unit 1, an automatic address deleting unit 2, an automatic address notifying unit 3, and an automatic address receiving unit 4.
, An input / output control unit 5, an own subnetwork terminal address table 6, and another subnetwork terminal address table 7. Here, the own subnetwork terminal address table 6 manages the network addresses of the terminal devices in the own subnetwork, and has a terminal device name and a terminal address (network address of the terminal device). The other subnetwork terminal address table 7 manages the subnetwork and network address to which the terminal device belongs in the other subnetwork, and includes the subnetwork name (identification information of the subnetwork), the terminal device name, and the terminal. Have an address.

FIG. 1B is a block diagram showing the configuration of a network (a network composed of a plurality of sub-networks) to which the network address dynamic management device shown in FIG. 1A is applied (each sub-network). Each network address dynamic management device exists for the network).

In this network, a terminal device 31 and a terminal device 32 are connected to the subnetwork 30, and a network address dynamic management device 300 manages a network address relating to the subnetwork 30. In addition, the terminal device 2
1 and the terminal device 22 are connected, and the network address dynamic management device 200
Is managed. further,
The network address dynamic management device 100 manages a network address related to the subnetwork 10 (a terminal device is also connected to the subnetwork 10 although not shown).

FIG. 2 illustrates the operation of the network address dynamic management device (the network address dynamic management device 200 and the network address dynamic management device 300 in FIG. 1B) at the time of terminal device subscription. FIG. 2 and FIG. 3, components denoted by reference numerals 1 to 7 in FIG.
207 or 301 to 307.

FIG. 3 illustrates the operation of the network address dynamic management device (the network address dynamic management device 200 and the network address dynamic management device 300 in FIG. 1B) of this embodiment when the terminal device leaves. FIG.

FIG. 4 is a flow chart showing the processing of the network address dynamic management device of this embodiment when a terminal device joins. This processing includes a transmission data reception / source address extraction step 41, a source address existence determination step 42, a subscribed terminal address generation step 43, and a local subnetwork terminal address table storage step 44.
A subscriber terminal address terminal device notifying step 45 and a subscriber terminal address and other subnetwork transmitting step 46
, A subscribed terminal address receiving step 47, another subnetwork terminal address table storing step 48, and a subscribed terminal address terminal device notifying step 49.

FIG. 5 is a flowchart showing the processing of the network address dynamic management device of this embodiment when the terminal device leaves. This processing is performed in Step 5 of receiving a withdrawal message.
1, a "leaving" notification step 52, an own subnetwork terminal address table deletion step 53, a deletion terminal address terminal device notification step 54, a deletion terminal address and other subnetwork transmission step 55, and a deletion terminal address reception step 56. , A sub-network terminal address table deletion step 57 and a deleted terminal address terminal device notification step 58.

Next, the operation of the thus configured network address dynamic management device of this embodiment will be described.

First, an operation at the time of joining a terminal device will be described (see FIGS. 2 and 4). Here, FIG.
As shown in the figure, when the terminal device 32 newly joins the subnetwork 30, the network address dynamic management device 200 and the network address dynamic management device 30
The operation of the network address dynamic management device 100 will be described in the same manner as the network address dynamic management device 200 (not described here). In this case, the processing and determination in steps 41 to 46 in FIG. 4 are processing and determination in the network address dynamic management device 300.
The processing of 7 to step 49 is processing in the network address dynamic management device 200.

When the terminal device 32 newly joins the subnetwork 30, the terminal device 32 sends out transmission data with the transmission source address as a dummy on the subnetwork 30. In addition,
As described above, the transmission data includes a source address, a destination address, and data contents.

Network address dynamic management device 300
The input / output control unit 305 receives the transmission data, extracts the source address from the transmission data (step 41), and assigns the transmission source address to the automatic address assigning unit 30.
Pass to 1.

The automatic address assigning unit 301 searches the own sub-network terminal address table 306 according to the source address, and determines whether or not the network address corresponding to the source address exists in the own sub-network terminal address table 306. (Step 42). That is, by this determination, it is determined whether or not the terminal device that is the source of the transmission data is a terminal device that has newly joined the own subnetwork (subnetwork 30). In this case, since the source address is dummy, it is determined that "the network address corresponding to the source address does not exist in the own subnetwork terminal address table 306".

The automatic address assigning section 301 determines in step 4
2 based on the above-described determination (determination that “the network address corresponding to the transmission source address does not exist in the own subnetwork terminal address table 306”), the transmission source terminal device (here, the terminal device 32) recognizes that it has newly joined the subnetwork 30, and generates "300320" as a network address to be assigned to the terminal device 32 (step 43). At the time of this generation, the generation is performed by referring to the own subnetwork terminal address table 306 or the like so as not to overlap with the network addresses of other terminal devices.

Further, the automatic address assigning unit 301 stores the network address (hereinafter, referred to as a subscription terminal address) in its own subnetwork terminal address table 306.
(Step 44), and passes the subscriber terminal address to the automatic address notification unit 303.

The automatic address notifying section 303 sends the subscriber terminal address (terminal apparatus 3) via the input / output control section 305.
2 notifies the terminal devices (terminal device 31 and terminal device 32) in the own sub-network (sub-network 30) (including a notification that the network device 2 has newly joined the network) (step 45). The subscriber terminal address is transmitted to the automatic address receiving unit 204 in the management device 200 (step 46). Although not mentioned here, the subscriber terminal address is similarly transmitted to the network address dynamic management device 100.

The automatic address receiving unit 204 receives the subscribed terminal address from the automatic address notifying unit 303 (step 47), and stores the subscribed terminal address in the other subnetwork terminal address table 207 via the automatic address assigning unit 201. It is stored (step 48), and at the same time, the subscriber terminal address is passed to the automatic address notification unit 203.

The automatic address notifying unit 203 notifies the terminal device (terminal device 21 and terminal device 22) in the own subnetwork (subnetwork 20) of the subscribed terminal address via the input / output control unit 205 ( Step 49). Thus, a series of processes illustrated in FIG. 4 ends.

If it is determined in step 42 that "the network address corresponding to the transmission source address exists in the own subnetwork terminal address table 306", the transmission source terminal device of the transmission data is newly set. It is recognized that the sub-network 30 has not been subscribed, and the control shifts to processing for normal transmission data (the processing shown in FIG. 4 ends).

Second, the operation when the terminal device is detached will be described (see FIGS. 3 and 5). Here, FIG.
As shown in FIG. 2, when the terminal device 32 leaves the subnetwork 30, the network address dynamic management device 2
00 and the operation of the network address dynamic management device 300 (although not mentioned here, the network address dynamic management device 100 performs the same operation as the network address dynamic management device 200). In addition,
In this case, steps 51 to 55 in FIG.
Is a process in the network address dynamic management device 300, and the processes of steps 56 to 58 are processes in the network address dynamic management device 200.

When the terminal device 32 leaves the sub-network 30, it sends a leaving message (transmission data indicating the effect of the leaving) to the sub-network 30.

Network address dynamic management device 300
The input / output control unit 305 receives the transmission data (withdrawal message) (step 51) and, based on the withdrawal message, determines whether the terminal device (the terminal device 32 in this case) of the withdrawal message has transmitted. That it will leave its own subnetwork (subnetwork 30) "
This is notified to the automatic address deletion unit 302 (step 52).

The automatic address deletion unit 302, based on the notification, executes its own subnetwork terminal address table 3
06 to the network address of the terminal device 32 (“30
0320 ”) (step 53), and passes the network address (hereinafter, referred to as a deleted terminal address) to the automatic address notification unit 303.

The automatic address notifying unit 303 sends the deleted terminal address (including a notification that the terminal device having the deleted terminal address has left the network) via the input / output control unit 305 to its own subnetwork ( The terminal device (the terminal device 31 and the terminal device 32) in the sub-network 30 is notified (step 54), and at the same time, the deleted terminal address is transmitted to the automatic address receiving unit 204 in the network address dynamic management device 200. (Step 55). Although not mentioned here, the deleted terminal address is similarly transmitted to the network address dynamic management device 100.

The automatic address receiving unit 204 receives the deleted terminal address from the automatic address notifying unit 303 (step 56), and transmits the deleted terminal address from the other subnetwork terminal address table 207 via the automatic address deletion unit 202. The address is deleted (step 57), and at the same time, the deleted terminal address is passed to the automatic address notification unit 203.

The automatic address notifying unit 203 notifies the deleted terminal address to the terminal devices (the terminal device 21 and the terminal device 22) in the own sub network (sub network 200) via the input / output control unit 205 ( Step 58). Thus, a series of processes illustrated in FIG. 5 ends.

In the above-described embodiment, "whether or not the terminal device is a newly subscribed terminal device" is registered in the own sub-network terminal address table 6 with the source address in the transmission data transmitted from the terminal device. The above has described the case where the automatic address assigning unit 1 which is determined by "whether or not has been performed" is a component. However, the mode of such determination is not limited to the above. Here, an invention having the above-described limitation corresponds to the invention described in claim 2, and an invention having no such limitation corresponds to the invention described in claim 1.

[0042]

As described above, according to the present invention,
A network address is assigned by the network address dynamic management device (the network address dynamic management device of the present invention) in the subnetwork assigning / deleting a network address of a terminal device which joins / leaves from the subnetwork constituting the network. Can be dynamically added to and deleted from the network, allowing the terminal to dynamically join or leave the network, making it easy to move and add terminals on the network without being aware of the network address of the terminal. This has the effect that it can be realized.

Further, at the same time that a terminal device joins / leaves from the network, all the terminal devices subscribing to the network can automatically recognize that fact. Can be automatically notified to another terminal device (accepted from the viewpoint of the other terminal device), and the burden on the user in recognizing a network address in communication between the terminal devices can be reduced. (Thus, quick communication between arbitrary terminal devices on the network can be easily realized.)

That is, the network addresses of the terminal devices newly joining the network can be automatically notified to the terminal devices in the own sub-network and the terminal devices in the other sub-networks. When performing communication, there is no need to separately notify the network address of the communication partner terminal device. Also, the network address of a terminal device that has left the network can be automatically notified to terminal devices in its own sub-network and terminal devices in other sub-networks. This is possible in all terminal devices.

[Brief description of the drawings]

FIG. 1A is a block diagram illustrating a configuration of an embodiment of the present invention, and FIG. 1B is a diagram illustrating an example of a network to which the network address dynamic management device illustrated in FIG. .

FIG. 2 is a diagram for explaining the operation of the network address dynamic management device shown in FIGS. 1A and 1B when a terminal device joins.

FIG. 3 is a diagram for explaining the operation of the network address dynamic management device shown in FIGS. 1A and 1B when the terminal device leaves.

FIG. 4 is a flowchart showing a process of the network address dynamic management device shown in FIGS. 1A and 1B when a terminal device joins;

FIG. 5 is a flowchart showing a process of the network address dynamic management device shown in FIGS. 1A and 1B when the terminal device leaves.

[Explanation of symbols]

1,201,301 Automatic address assigning unit 2,202,302 Automatic address deleting unit 3,203,303 Automatic address notifying unit 4,204,304 Automatic address receiving unit 5,205,305 Input / output control unit 6,206,306 Own sub-network terminal address table 7, 207, 307 Other sub-network terminal address table 10, 20, 30 Sub-network 21, 22, 31, 32 Terminal device 100, 200, 300 Network address dynamic management device

Claims (2)

(57) [Claims] 1. An own sub-network terminal address table for managing network addresses of terminal devices in the own sub-network, and another sub-network terminal address table for managing sub-networks and network addresses of terminal devices in other sub-networks An automatic address assigning unit that generates a network address to be assigned to a terminal device newly joined to the own sub-network, and stores the network address in the own sub-network terminal address table; and a terminal that has left the own sub-network. An automatic address deletion unit for deleting a network address for a device from the own subnetwork terminal address table; and a “network address of a newly subscribed terminal device” notified from another subnetwork. The sub-network address is stored in the other sub-network terminal address table, and receives the “network address of the departed terminal device” notified from the other sub-network, and stores the network address in the other sub-network. An automatic address receiving unit that performs control to delete from the terminal address table; and performs control to notify a terminal device in the own sub-network of the network address assigned by the address assigning unit and the network address deleted by the address deleting unit. Transmitting the assigned network address and the deleted network address to another sub-network, and accepts the "network address of the newly joined terminal device" and the "network address" received by the automatic address receiving unit. An automatic address notifying unit for controlling to notify the terminal device in the own sub-network of the "network address of the set terminal device", and an input / output control unit for controlling input and output to and from the terminal device in the own sub-network. A network address dynamic management device, characterized in that: 2. Whether the terminal is a newly subscribed terminal
The automatic address assigning unit for determining whether the source address in the transmission data transmitted from the terminal device is not registered in the own subnetwork terminal address table or not. The network address dynamic management device according to the above.