JPS60214137A - Network management system - Google Patents

Abstract

PURPOSE:To attain ease of new installation or transfer of a slave station by adding a mixture preventing portion to a registration request address at a slave station, transmits the result to a master station and alloowing the master station to add the address of the slave station and the mixture preventing portion to the information representing propriety of registration and transmit the result to the slave station. CONSTITUTION:When a slave station is connected newly to a communication network NW in the NW comprising one master station and plural slave stations, the slave station sets optionally the address of the own station, the set address passes through a switch 13, a registration processing section 11 adds a random value of the mixture preventing portion generated from a random value generating section 10, it is transmitted to the master station through a switch 14 and the random value is stored in a storage section 12. The master station collates an address table 23, the transmitted address is used by the NW, whether it is not registered previously is checked, a command processing section 21 adds an OK signal to the random value and address value of the slave station read by the storage section 22 and transmits the result to the slave station. The slave station uses an output of an AND 16 between the random value added by the master station and the value from the storage section 12 to close a switch 15 and receives the signal.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a network management system, and particularly to a network management system used in a dedicated system in which addresses can be arbitrarily selected.

(b) Prior art and problems The conventional network management method for slave stations is that when a new slave station is connected to the network, a network administrator (maintainer) manages it offline and registers the information in the master station. Alternatively, there is a method of registering a pre-assigned address online from a slave station.

In the former case, since it is done offline, there is a lack of real-time performance, and in order for the maintainer to manage the addresses so that there are no duplicates, all slave stations must receive addresses through the maintainer, and the address that you want to assign can be assigned. There was a problem that there was a lack of freedom.

On the other hand, in the latter case, the slave station can freely address the master station online, but in order to prevent the addresses of the slave stations from duplicating, as in the former case, it is not possible to add any arbitrary address to the address of the slave station, and There was a problem in that because it was done online, there was a risk of double address registration.

(C1 Purpose of the Invention The present invention has been made in view of the problems of the prior art described above, and provides a network management system that facilitates the installation and relocation of slave stations, has a relatively high degree of freedom, and is capable of real-time performance. Aiming for something.

tdl Structure of the Invention The object of the above invention is to provide a communication network system consisting of one master station and a plurality of slave stations, by adding a mixing prevention part to the AT female that requests registration in the slave stations. The main station checks the address, adds the address and the mixing prevention part to the information on whether or not it can be registered, and sends it to the slave station. This is achieved by promoting methods.

(e) Examples of the invention FIG. 1 shows an example of the configuration of a communication network system.

In the figure, 1 indicates a master station, 2 to 4 indicate slave stations, and 5 indicates a transmission path.

In the same figure, the master station 1,
4 to slave station 2 exists 1~, 4 to slave station 2 processed by master station 1
Communication between each station is performed using the Arres.

Figure 2 shows the slave station random value generation and
An example of a detection unit is shown.

FIG. 3 shows an example of a random value processing section on the master station side for implementing the present invention.

FIG. 4 is a diagram for explaining an example of an address registration procedure performed using the apparatuses shown in FIGS. 2 and 3.

, 2. In Figure 2, 10 is the random vegetation area, and 11 is the random vegetation area.
12 represents a registration processing unit, 12 represents a random value storage unit, and 13-1 represents a registration processing unit.
5 represents a switch section, lfi represents an AND circuit, and 17-2° represents a terminal.

In FIG. 3, 21 is a command processing section, 22 is a random value storage section, 23 is an address table section, 24 and 25
indicate the respective terminals.

Next, the operations in FIGS. 2 and 3 will be explained with reference to FIGS. 4 and 5.

First, in the slave station shown in Fig. 2, when the slave station 2 is newly connected to the network and notifies the master station 1 of the information, the slave station 2 first connects to the network and notifies the master station 1 of the information. Set your own station's AT female as desired.

The arbitrarily set at1nos is a random value automatically generated by the random value generation section 10 in the registration processing section 11 through the terminal 17 and the random value generation section 10 (as described in the claims). (Example of mixing prevention part) is added later (J is added,
It passes through the inch part 14 and is sent to the master station 1 from the terminal 19 (see FIG. 5).

In addition, the slave station issues 4. The random value is stored in the random value storage unit 1.
2 is stored.

Next, the master station shown in FIG. 3 checks whether the address of the slave station 2 and the random value input from the terminal 25 satisfy the following conditions.

(1) Is it an AT female that can be used in your network?

(2) Whether the address is a duplicate of a previously registered address.

This is done by comparing the address with the address in the address table section 23.

The above two articles? 1, the master station sends the random value of the slave station 2 read from the random value storage unit 22 and an OK signal to the AT female, and if it has already been registered, sends a NO signal to the command processing unit. At step 21, the signal is added and sent to -r station 2 (see Figure 5).

A slave station-C not shown in FIG. 2 is a parent station added to the terminal 20.

The signal from station 1 is processed by an AND circuit 16, which combines the random value contained in this signal, rung J, and rung! , the values are compared and if they match, the switch section 15 is turned on.

Therefore, a detection circuit (not shown) connected to terminals 20 and 18 and connected to terminal A111 sends a signal to the master station.
゛Response has been registered to the master station. It is detected that ``nu'' has not been registered (see Figure 5 ■).

Once registered, switch sections 13 and 14 are turned on, terminals 17 and 19 are connected, and communication becomes possible.

Register addresses for other slave stations using the same procedure as above (5th
(See Figures ■ and ■).

If there are duplicate registration requests for the same address/female, master station 1 will accept the request from slave station 2 and respond to it (adding the IK response to the random value and address received at the time of the registration request). Send.

Therefore, the slave station 2 can detect the OK response as described above, but for example, since the random value of the slave station 3 is different from the one at the time of the registration request, the switch unit 15 will not be turned on and the OK response from the master station 1 will not be turned on.
Unable to detect double signal.

Therefore, you must request address registration again.

Figure 5 shows an example of the frame format.

In the figure, Fo and Fc are the synchronization flags, 8 is the partner station address, C is the control @ (for example, want to register or OK, etc.), SA is the own station address, and RD is the random value. , Fcs indicate error detection codes, respectively. Address registration from the slave station and response from the master station are performed according to this frame boot mat.

ffl As described in detail, according to the present invention, when the address of a slave station changes due to new installation/relocation, etc., the slave station must request the master station to register the address.

At this time, the slave station sends an arbitrary address under the network address system and a random value, and the master station checks for double registration and also checks if the same address is registered by multiple slave stations. Double registration can be prevented by adding a random value.

Therefore, the network can be operated safely and efficiently.

[Brief explanation of drawings]

Fig. 1 shows an example of the configuration of a communication network system, Fig. 2 shows a slave station random value generation/detection unit for carrying out the present invention, Fig. 3 shows a master station address/random value processing unit, and Fig. 4 shows a master station address/random value processing unit.
The figure shows an example of an address registration procedure, and FIG. 5 shows an example of a frame format. In the figure, 10 is a random value generation section, 11 is a registration processing section, 12 and 22 are random value storage sections, 1 to 15 are switch circuits, 16 is an AND circuit, 21 is a command processing section, 23 represents an address table section, and 17 to 20 and 24.25 represent terminals, respectively. Agent Patent Attorney Calibration Koshibe Q

Claims (1)

[Claims] In a communication network system composed of one master station and multiple slave stations, the slave station adds a mix prevention part to the address to request registration and sends it to the master station, and the master station then sends the address to the master station. A network management method characterized in that the address and the mixture prevention part are added to the information on whether or not registration is possible after checking, and the information is sent to the slave station.