JPH03211647A - Computer network system - Google Patents

Abstract

PURPOSE:To eliminate the failure of call setting by providing the control table of a network address in a common file and permitting host computers to directly detect the conflicition of the network addresses by means of the control table. CONSTITUTION:The common file 40 includes the control table 41 of the network address of terminals 61-63 executing connection through an exchange network 50. At the time of connecting the terminals, the host computers 10 and 20 refer to the control table 41 by judgement means 12 and 22, which investigate whether there is the host computer using the necessary network address or not. When there is not, registration means 13 and 23 register effect that the self host computer is to use the address to the control table 41. After it is used, release means 14 and 24 release the registered network address. Thus, the host computer can previously detect the conflicition of the network addresses and they can avoid it so as to prevent the error of call setting.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is used in a combinatorial network system, and particularly relates to a computer network system with an improved network address management method.

〔overview〕

The present invention provides a computer network system that includes a plurality of host computers having a shared file, a communication processing device, a switching network, and a terminal. It eliminates call setup failures by allowing computers to directly detect network address conflicts.

[Conventional technology]

Conventionally, network addresses in this type of computer network system have been managed by communication processing equipment, and the host side does not check for address sharing, so address sharing is detected during call processing. , the configuration was such that call setup failed.

[Problem to be solved by the invention]

In the network address detection method in the conventional computer network system described above, only the communication processing device manages the network address collectively, so it is determined on the host computer whether or not the network address used for making and receiving calls is usable. However, during call setup, the communication processing device communicates that the network address should be shared, resulting in call setup failure.

An object of the present invention is to provide a computer network system having an address management method that does not cause call setup failures by eliminating the above-mentioned drawbacks.

[Means for Solving the Problems] The present invention provides a plurality of host computers, a shared file that can be accessed from each computer, a communication processing device that is connected to each of the above-mentioned combination computers and performs communication processing, and a communication processing device that performs communication processing. at least one switching network connected to the processing device;
In a computer network system comprising a plurality of terminals connected to the exchange network and connected to the host convenience store via the exchange network by the communication processing device, the shared file is connected via the exchange network. including a management table of network addresses of the terminal that performs
The host computer includes a communication management unit that performs network control, a determination unit that determines whether or not a required network address can be used based on the management table, and registers the network address determined to be usable in the management table. and a release means that releases the registered network address after use.

[Effect]

The shared file includes a management table for managing network addresses, and when connecting a terminal, the host computer uses a judgment method to consider whether there is a host computer using the required network address. However, if it does not exist, the registration means registers in the management table that the own host computer uses it. After use, the registered network address is released by the release means.

Therefore, when the host computer connects the terminal,
Network address conflicts can be detected and avoided in advance, and call setup errors can be prevented.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing an example of a management table thereof.

According to FIG. 1, in this embodiment, the network configuration table 15
and 25, respectively.
0 and 20, a shared file 40 that can be accessed from each computer 10 and 20, and each computer 1.
Communication processing device 3 connected to 0 and 20 and performing communication processing
0, two switching networks 50 connected to this communication processing device 30, and three terminals 61 connected to this switching network 50 and connecting to the host computer 10 or 20 via the switching network 50 by the communication processing device 30. .62 and 63, a feature of the present invention is that the shared file 40 includes a management table 41 of the network addresses of the terminals 6L 62 and 63 that connect via the exchange network 50. , the host computers 10 and 20 respectively have communication management means 11 and 21 that perform network control, determination means 12 and 22 that determine whether or not a required network address is usable based on a management table 41, and determination means 12 and 22 that determine whether or not a required network address can be used. It includes registration means 13 and 23 for registering the determined network address in the management table 41, and release means 14 and 24 for releasing the registered network address after use.

According to FIG. 2, the management table 41 includes a network address field 411 in which a network address is registered, and a used host name field 412 in which the name of a host computer using the network address is registered.

Next, the operation of this embodiment will be explained with reference to the flowchart shown in FIG.

FIG. 3 is a flowchart showing the operation of the determining means 12.

121 is the specified network address management table 4
An investigation step (I
), 122 is an investigation step (n) for checking whether the network address is available, 123 is an availability notification step for notifying the communication management means 11 that the network address is available, and 124 is an availability notification step for notifying the communication management means 11 that the network address is available. This is an unusable notification step to notify that it is possible.

Host computers 10 and 20 are communication processing device 30
, and communicates with the terminal groups 61 to 63 via the switching network 50.

Here, assume that a call is made from the terminal 61 to the host computer 10 via the switching network 50. When the communication management means 11 receives an incoming call request from the terminal 61, it selects a terminal configuration table for controlling the terminal from the network configuration table 15 using the identifier given at the time of the incoming call. At this time, the identifier attached to the receiver when a call arrives may be the address of the other party's terminal,
A password entered from the terminal may also be used. Regarding the network address added to the terminal configuration table selected in this way, the communication management means 11 inquires of the determination means 12 whether or not this network address can be used. When the determination means 12 is activated, the investigation step (in 21, the network address specified in the management table 41 is entered in the network address field 4).
Check whether it is in 11.

If not, the communication management means 11 is notified of the unusability through the unusability notification step 124. If the target network address is present in the network address field 411, a check is made in step ([) 122 to check whether the network address is being used by another host combination. Use host name field 4 corresponding to network address
12 is blank, the network address is considered to be usable, and this fact is notified in the availability notification step 123.
The communication management means 11 is notified by.

When the communication management means 11 receives a notification from the determination means 12 that the network address is usable, the communication management means 11 sends the registration means 13
Start the host name field 412 of the management table 41.
Write the name of your own host computer in , and register to use this network address. Further, when receiving a notification that the terminal is unusable, the network configuration table 15 is searched again for an available terminal configuration table based on the identifier. Also,
If you cannot find the terminal configuration table, use communication management means 11.
rejects the incoming call and performs disconnection processing.

Also, when setting up a call, terminating communication, and releasing the call,
The communication management means 11 activates the release means 14 and releases the management table 4.
The used host name field 412 of the corresponding network address No. 1 is replaced with a blank, so that when the management table 41 is searched from another host computer, it can be determined that the network address can be used.

〔Effect of the invention〕

As explained above, since the present invention can detect network address conflicts before starting communication with the communication processing device, it is possible to detect network address conflicts during call setup and eliminate call setup failures. There is an effect that can be achieved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is an explanatory diagram showing an example of the management table. FIG. 3 is a flowchart showing the operation of the determining means. 10.20...Host computer, 11.21...
・Communication management means, 12.22... Judgment means, 13.2
3... Registration means, 14.24... Release means, 15.
25...Network configuration table, 30...Communication processing device, 40...Shared Finope 41...Management table, 50
... Switching network, 61.62.63 ... Terminal, 121.
...Investigation step (I), 122...Investigation step (
II), 123... Availability notification step, 124
. . . Unavailability notification step, 411 . . Network address field, 412 . . . Use host name field. Example (management table 41) Figure 2

Claims (1)

[Scope of Claims] 1. A plurality of host computers, a shared file that can be accessed from each computer, a communication processing device connected to each computer and performing communication processing, and at least one computer connected to the communication processing device. A computer network system comprising a switching network and a plurality of terminals connected to the switching network and connecting to the host computer via the switching network by the communication processing device,
The shared file includes a management table of network addresses of the terminals that connect via the exchange network, and the host computer has communication management means for controlling the network, and the management table allows the host computer to use the required network addresses. The method is characterized in that it includes a determining means for determining whether or not the network address is available, a registering means for registering the network address determined to be usable in the management table, and a releasing means for releasing the registered network address after use. computer network system.