JPH0248839A - Communication controller for undefined communication network - Google Patents

Abstract

PURPOSE:To attain composite communication by various communication means between terminal equipments by designating a communication means of a terminal equipment and an opposite terminal equipment by hardware constitution with an address number system. CONSTITUTION:A communication request signal from a caller communication controller is given from a network 50 to a reception buffer 40 in a called communication controller. A request signal is given to a representative address number identification circuit 68 and the circuit compares the unit number of a destination address section of the request signal with a representative address number read from a representative address number storage circuit 76. When they are coincident in this case, the circuit 68 disables a unit identification circuit 64. Moreover, in the circuit 64, the unit number of the destination address section of a communication request signal is compared with the unit number of a unit number storage circuit 66. The circuit 64 identifies the communication request signal to be addressed to itself from the unit number only. In the case of the representative address number, a communication request signal not obtaining the coincidence is output to the next stage.

Description

TECHNICAL FIELD The present invention relates to a communication control device, and more particularly to a communication control device that connects an amorphous communication network and a terminal having a representative address.

BACKGROUND OF THE INVENTION In the field of telephone exchanges, a representative selection method is known in which a single representative number is assigned to a plurality of terminals, and when a call is received, one of the available terminals is connected. In local area networks, there is a similar group address system used in amorphous communication networks such as Ethernet and Omninet. The purpose of the group address method is to transmit information to all group members for a preset group of stations, servers, etc.

For example, patent application No. 132-1139708 filed by the present applicant.
．． The communication control device related to the handshake unit described in 82-187791 and θ2-305880 is
A patent application filed in 1982 between one user terminal and the other user terminal.
-85540 is used to set up a point-to-point communication path via an amorphous communication network. At this time, it is assumed that both user terminals are single boats.

However, when using a network, user terminals do not necessarily communicate with each other at the same time.

For applications such as e-mail and electronic bulletin boards, where there is a time lag between sending and receiving files,
This is normal usage. At this time, the network includes at least one so-called mail server having a message storage function. All file access traffic from each user then goes to the mail server.

Therefore, if there is only one mail server on the network, and if the mail server is connected to the network by a single port like each user terminal, then the undefined communication network described in Japanese Patent Application No. 85540/1982 Due to the operating characteristics of the mail server, when one user is accessing the mail server, other users cannot access the mail server.

Therefore, it is required to increase the number of users who can access the mail server at the same time by connecting the mail server where the traffic is concentrated to the network using multiple ports.

1-Ao It is an object of the present invention to overcome the drawbacks of the prior art and to provide a communication control device for an amorphous communication network that is capable of representative selection.

In order to achieve the above object, the present invention, upon receiving an outgoing signal, transmits the outgoing signal to a route other than the direction in which the outgoing signal was received, and transmits the incoming signal returned in response to the outgoing signal. A communication control device connected to an amorphous communication network that connects the route received first to the route where the outgoing signal was received, the communication control device is assigned an address number in the amorphous communication network, and is connected to at least one terminal. When one communication control device constitutes a group, the communication control device of the amorphous communication network that controls the transmission and reception of signals between the amorphous communication network and the amorphous communication network shall have a representative address number representing the communication control devices included in the group. a storage means for storing the outgoing signal; a comparing means for receiving the outgoing signal from the amorphous communication network and comparing the address number included in the outgoing signal with a representative address number; The present invention is characterized in that it includes a control means for returning a return signal to the amorphous communication network when the address number corresponding to the representative address number matches the representative address number.

An embodiment of the present invention will be described below.

In FIG. 2, a network 50 is, for example, an amorphous communication network described in Japanese Patent Application No. 82-85540,
Each boat is connected via a transmission line on a first-come, first-served basis. Each node selects the digital signal input from the input port using first-come, first-served logic, and broadcasts it from each output port to each node.0 The originating terminal sends a communication request signal containing the destination address number from the communication control device. , this signal is sent to all terminals via each node. An acknowledgment signal is returned from the receiving terminal whose address matches the destination address number. Each node relays this on a first-come, first-served basis to fix the communication path, thereby establishing a point-to-point communication path between the originating and receiving terminals. However, network 50
Communication is not only instantaneous point-to-point communication between terminals, but also e-mail, which receives messages from terminals, stores them, and then distributes them later, and electronic mail, which stores messages, accesses them, and prints them. There are servers such as bulletin boards.

FIG. 2 shows an example of the configuration of one communication system.

Here, the communication control device lO connected to the terminals 107 to 15T
-15 are, for example, Japanese Patent Application No. 82-189708, Japanese Patent Application No. 82-187791, or Japanese Patent Application No. 12-305880.
The communication control devices O1 to O4 have one end connected to the Ox boats 1 to 4 of the server 100,
The other end is connected to each of the four boats of the network 50. The network 50 is connected to the server 100 through four multi-boards. The server 100 uses these four
Messages entrusted to each terminal are simultaneously received from the two boats to the Ox boat via the communication control device, and the messages are sent to the disk 110.
is stored as an email. Email later, disk 11
Starting from 0, it is read and sent to the destination.

Now, the Ox boat of server 100 is terminal 10T~+5
Terminals 10T to 15 have individual address numbers similar to 7.
T and Ox boat numbers are 10-15 and O1-0
When communication is being performed with the combination of 0 communication control devices 11-01 and 15-02, the terminal 12T of the communication control device 12 attempts to access the server 100 by specifying numbers 01 to 04. If there is no response at numbers 01 and 02, and a connection is made using number 03, three accesses will be required, two of which were invalid.

Since an amorphous communication network broadcasts packets throughout the network when establishing a connection, invalid calls increase unnecessary traffic and degrade connection services for other users. The greater the number of servers and the higher the frequency of access from user terminals, the more the service will deteriorate more significantly. In the above example, even if the first time terminal 12T makes a call with number 01 and there is no response and the communication path is not fixed, the second time it makes a call with the same number, the Ox boat is already free. In some cases, the communication path is fixed. As described above, it is not a good idea to give a commonly used server or the like an individual address number similar to that of a user terminal because it lowers the service grade of the network.

Therefore, the present invention introduces a representative address number including the wild number X. Numbers containing an X represent multiple numbers. where 0 or a wild number and a single digit letter, symbol or number is used. For example, Ox is 00,01
~09, or 8X2 represents 802, 812~
B! It is predetermined to represent 12.

Communication control devices i01 to 0 connected to server +00
When this representative address number is applied to 0f-04, it is represented by Ox, and each boat is given an address number in the form of a double number of an individual address number of 0f-04 and a representative address number Ox.

As mentioned above, when three of the Ox boats of the server 100 are in use, when the user's communication control device 12 sends a communication request signal with the representative address number OX as the destination address, the only free communication control device , receives this signal, uses the representative address number identification function to identify it as a signal addressed to its own station, connects to the boat, and returns an acknowledgment signal.

As is clear from the above explanation, by assigning one representative address number to a server etc. that has multiple communication boats, the situation where connection cannot be made even if there is an empty boat, which occurs when using individual addresses, is eliminated, and the user's effort is saved. This has the effect of eliminating wasted time and preventing unnecessary traffic from increasing in the amorphous communication network. It is also possible to further increase the connection rate of one originating terminal by providing a communication control device of the terminal with a retransmission function for communication request signals and repeating re-calls at regular intervals.

Next, the case where four boats Ox are vacant will be explained. The 0 communication control device 12 sends out a communication request signal including the representative number OX. Packets are sent to four communication control devices O1~
04, reception is confirmed by the address identification function, and acknowledgment signals are sent back from the four communication control devices.

In the seventh node of the network 50, the first-come, first-served logic selects only one boat of the node that detected the signal earliest and fixes the path as the input port, so only one of the four Ox boats is selected. Each communication control device corresponding to the remaining three boats that were not selected monitors the signal from the network 50, and when there is no signal, releases the bus after a predetermined time, and soon becomes an empty receiving state.

An acknowledgment signal from a communication controller connected to one of the selected Ox boats at a node enters the communication controller 12, both of which are connected to a respective user terminal 12T.
and one of the Ox boats and the network 50 side, and a communication path is fixed.

Next, FIG. 1 shows an outline of an embodiment of a communication control device in this embodiment.

This device can be used for any of the communication control devices 01-04 and 10-15 of the server 100 having a representative address number and the user terminals 107-15T having individual address numbers in the network 50 of FIG. The format of the communication request signal and acknowledgment signal transmitted and received from this communication control device to the network 50 is shown in FIG. 3. Each signal consists of a destination address section, a source address section and a signal type display section, The address part and the source address part each consist of an attribute number and a unit number, and the unit number further consists of an individual address number or a representative address number. The server 10G uses dual numbers of a representative address number and individual address numbers corresponding to each port.

1, a communication request command signal is inputted to the communication request detection circuit 21 from a data terminal (DTE) via an interface. , which may be input by an operator from an input device such as a keyboard. When the communication request detection circuit 21 detects the input communication request command signal, it instructs the destination address number generation circuit 23 to generate a destination address. Send the requested signal. In response, the destination address number generation circuit 23 generates an individual or representative address number of the unit number of the destination address portion of the communication request signal and an attribute number. The attribute number specifies the DTE interface. The DTE interfaces 42 and 44 are devices that are connected to various communication devices that are communication means of terminals, and convert the signal system of data terminals, computer systems, etc. into the signal system of the network 50 to match them. It is installed according to the type.

The destination address number generation circuit 23 generates a control signal that includes a destination address number requesting communication, that is, a unit number and an attribute number, and operates the communication request signal generation circuit 25.
It is sent to the communication request signal generation circuit 25 through the signal line 104.

The communication request signal generation circuit 25 is activated by a control signal from the destination address number generation circuit 23, generates a communication request signal, and outputs it to one input of the OR circuit IB through the signal line 108. In this case, as will be described later, an acknowledgment signal is generated from the acknowledgment signal generation circuit 18 and inputted to the other input of the OR circuit 16 through the signal line 110.

Therefore, when the communication request signal generation circuit 25 does not generate 1 communication request value number, the logic "0" signal is sent to the OR circuit so that the acknowledgment signal output from the acknowledgment signal generation circuit 18 to the OR circuit 18 is not masked. Output to 1B.

When either the communication request signal from the communication request signal generation circuit 25 or the acknowledgment signal from the acknowledgment signal generation circuit 18 is input, the OR circuit IB transmits this signal to the signal line 1.
12 to the transmission buffer 20. The transmission buffer 20 transmits the signal sent from the OR circuit 16 to the signal line 11.
4 to the OR circuit 22. The OR circuit 22 is
Transmission buffer 20 or switching circuit 4B described later
The signal from the network 50 is sent to the network 50 through the signal line tte. In this way, a communication request signal is transmitted from the communication control device 10, and reaches the reception buffer 40 of the other communication control devices 11-15°01-04 via the network 50.

The reception buffer 40 is connected to the signal line 13 from the network 50.
8 and sends it to the representative address number identification circuit 68 through the signal line 15B. The signal sent from the network 50 to the reception buffer 40 is a communication request signal or an acknowledgment signal, and as shown in FIG. 3, it consists of a destination address section, a source address section, and a signal type display section. The destination address field includes a unit number, which is the address code of the control device of the other party (called side) with which one communication is to be performed, and an attribute number assigned to a specific DTE interface of the called side to which connection is desired. 0
Similarly, the source address field contains the unit number, which is the address code of the control device of the source (calling side) making the communication request, and the attribute number assigned to the specific DTE interface of the calling side to which you want to connect. Contains. The signal type display section each includes a code indicating either a communication request signal or an acknowledgment signal.

The representative address number identification circuit 68 also has a zero representative address number storage circuit 78 to which the output from the representative address number storage circuit 7B is input through the signal line 170. A representative address number is stored in advance.

The representative address number identification circuit 68 compares the destination address part of the signal inputted from the reception buffer 40 with the representative address number, which is its own address code inputted from the representative address number storage circuit 7B, and determines the destination address part of the signal inputted from the reception buffer 40. The representative address number identification circuit 8 identifies whether the communication request signal or acknowledgment signal received is a signal addressed to the own station. If so, the communication request signal or acknowledgment signal input from the reception buffer 40 is sent to the signal line 1.
74 to the input of the OR circuit 36 and the disable input of the unit identification circuit 64. Then, the signal line 176 becomes 0, and the same signal as that on the signal line 174 is output to the output signal line 164 of the OR circuit 36. Furthermore, if the signal input from the signal line 15B to the representative address number identification circuit 68 is not the representative address number addressed to the own station, the unit identification circuit 64 is enabled via the signal line 152. The unit identification circuit 64 is a circuit that identifies when the communication control device uses a destination address representing an individual address that is not a representative address number, and the output from the unit number storage circuit 6B is a signal! ! It is input through 1B2. The unit number storage circuit 66 stores in advance a unit number, which is an address code necessary to identify a specific one of the communication control devices 10.

The unit identification circuit 64 also inputs the destination address part of the input signal to the reception buffer 40 to the unit number storage circuit 8.
The communication request signal or acknowledgment signal input from the receiving buffer 40 is compared with the unit number, which is the own address code input from 6, to identify whether or not the communication request signal or acknowledgment signal input from the reception buffer 40 is a signal addressed to the own station. Uniy) The identification circuit 64 is connected to the reception buffer 4
If the signal input from 0 is a signal addressed to the own station,
The communication request signal or acknowledgment signal input from the reception buffer 40 is input to one end of the input of the OR circuit 36 through the signal line 178. If the communication request signal or acknowledgment signal is input by the 0 individual address, the representative address number is identified. Since the output 174 of the circuit θ8 is O, the output signal of the OR circuit 36 outputs the same signal as the signal on the signal line 176 to the attribute identification circuit 60, and if the signal is not addressed to the own station, the signal line The receive buffer 40 outputs a heliset signal through IEf[i.

The output from the attribute number storage circuit 62 is also input to the attribute identification circuit 60 through a signal line 188. The attribute number storage circuit 82 stores a plurality of [lT
Attribute numbers, which are identification numbers that identify each E-interface, are stored.

The attribute identification circuit 60 determines whether the attribute number of the communication request signal or acknowledgment signal input from the unit identification circuit 64 is one of the attribute numbers stored in the attribute number storage circuit 62, that is, whether the own device is Multiple D
Confirm that it is one of the TE interfaces, and set the attribute number included in the communication request signal or acknowledgment signal to D.
It is sent to the TE interface selection circuit 24. The attribute identification circuit 80 also outputs the communication request signal or acknowledgment signal input from the unit identification circuit B4 to the signal type identification circuit 32 through the signal line 170.

The signal type identification circuit 32 also receives the output from the communication request code storage circuit 34 through the signal line 128. The communication request code storage circuit 34 has a communication request code that is unified in all communication control devices in advance. remembered.

The signal type identification circuit 32 includes a signal type display section of the signal sent from the attribute identification circuit 60 and a communication request code storage circuit 34.
It is determined whether the signal sent from the attribute identification circuit 60 is a communication request signal or not. The signal type identification circuit 32 detects the data sent from the attribute identification circuit 80 when the signal type display part of the signal sent from the attribute identification circuit 60 is the same as the data of the communication request code output from the communication request code storage circuit 34. The received signal is determined to be a communication request signal, and in this case, a signal indicating that there is a communication request signal is outputted to the acknowledgment signal generation circuit 18 and the OR circuit 28 through the signal line 120.

When the acknowledgment signal generation circuit 18 receives a signal indicating that there is a communication request signal from the signal type identification circuit 32, it is activated, generates an acknowledgment (Ack) signal, and outputs an OR signal through the signal line 110. When the 0 devices 10 to 15 output to the input of the circuit 1B. It is input to the other input of the OR circuit 16. Therefore, when the acknowledgment signal generation circuit 18 does not generate an acknowledgment signal,
A logic "0" signal is output to the OR circuit 18 so that the communication request signal output from the communication request signal generation circuit 25 to the OR circuit 16 is not masked.

When the signal type identification circuit 32 determines that the signal sent from the attribute identification circuit 80 is not a communication request signal, the signal type identification circuit 32 transmits the signal sent from the attribute identification circuit 60 to the signal type identification circuit 2 through the signal line 12B. Send.

The output from the acknowledgment code storage circuit 30 is also input to the signal type identification circuit 28 through the signal 1i124.

The acknowledgment code storage circuit 30 stores in advance an acknowledgment code that is unified for all communication control devices.

The signal type identification circuit 28 compares the signal type display part of the signal sent from the signal type identification circuit 32 with the data of the acknowledgment code output from the acknowledgment code storage circuit 30,
It is determined whether the signal sent from the signal type identification circuit 32 is an acknowledgment signal or not. The signal type identification circuit 28 detects the signal type identification circuit 32 when the signal type display part of the signal sent from the signal type identification circuit 32 is the same as the data of the acknowledgment code output from the acknowledgment code storage circuit 30.
It determines that the signal sent from is an acknowledgment signal, and in this case outputs a signal indicating that there was an acknowledgment signal to the OR circuit 26 through the signal line 122.

When either a signal indicating that there is a communication request signal from the signal type identification circuit 32 or a signal indicating that there is an acknowledgment signal from the signal type identification circuit 28 is input to the OR circuit 2B, , outputs an activation signal to the D/E interface selection circuit 24 through the signal line 11B.

The DTE interface selection circuit 24 is activated by the activation signal from the OR circuit 26, and based on the DTE interface selection signal input from the attribute identification circuit 60, sends a control signal for switching the switching circuit 4B through the signal line 142. Output to the switching circuit 46. The switching circuit 4B switches the switch according to the control signal from the DTE interface selection circuit 24, and connects either the DTE interface 42 or the DTE interface 44 to the network 50, and releases the other.

The signal selected by the switching circuit 4B and input to the switching circuit 46 from the 90TE interface 42 or the D90E interface 44 is transmitted through the signal line 140,
It is sent to the network 50 through the OR circuit 22 and the signal line 1111. Further, the signal input from the network 50 to the switching circuit 48 through the signal line 138 is transmitted to the DTE selected by the switching circuit 46.
Interface 42 or DT! It is sent to interface 44.

TE vane face 42 connects signal lines 144 and 14
B is connected to the switching circuit 4B.

DTE interface 42 is also connected to user terminals by signal lines 152 and 154.

DTE interface 44 is similarly connected to switching circuit 46 by signal lines 148 and 150.
DTE interface 44 is also connected to user terminals by signal lines 15B and 15B.

As the DTE interfaces 42 and 44, for example, an R5232C serial interface, an R5422 serial interface, a Centronics parallel interface, etc. can be used, and it is sufficient to select and use two or three types of these. Two DTs
Although the DTE interfaces 42 and 44 are provided, the number of DTE interfaces connected to the switching circuit 46 is not limited to two, and can be any number of three or more. Since one boat is used as a terminal in the server 100, only one of the two DTE interfaces is used.

The operation of the communication control device shown in FIG. 1 will be explained with reference to FIG. 2. In this operation example, the user terminal 12T in FIG.
This is for the case of communicating with 00. The communication control device on the called side is 14 or 01.

First, a communication request command signal is input to the communication control device 12 from the data terminal 12T on the calling side in FIG.

This communication request command signal is input to the communication request detection circuit 21 shown in FIG. 1 in the communication control device 12 on the calling side.

When a communication request command signal is input to the communication request detection circuit 21, the one communication request detection circuit 21 sends it to the destination address number generation circuit 23. Destination address number generation circuit 2
Step 3 creates attribute numbers and unit numbers as shown in FIG. In other words, from the entire network,
In the process of extracting an end-to-end communication path between points, the calling device selects a signal to connect one of the DTE interfaces 42 or 44 to the network 50, i.e., a signal assigned to the DTE interface to be connected. The own address, that is, the unit number is constructed from the attribute number and the unit number unique to the device.

In addition, as the destination address, the unit number that specifies the device on the called side, the attribute number assigned to the source address,
That is, it generates a destination address consisting of the same attribute number as its own attribute number.

If the called side is the server 100, the unit number becomes the representative address. These addresses are used by the communication request detection circuit 2.
along with the communication request command signal sent from signal line 10.
4 to the communication request signal generation circuit 25.

The communication request signal generation circuit 25 is activated by a signal from the destination address number generation circuit 23, and the communication request signal from the communication request signal generation circuit 25 is inputted to one input of the OR circuit 16 through the signal line +08. At this time, since the communication control device 12 is the calling side, the acknowledgment signal generation circuit 18
Since no acknowledge signal is generated from
The other input is human input. Therefore, the communication request signal from the communication request signal generation circuit 25 is outputted from the output of the OR circuit 18 and sent to the transmission buffer 20 through the signal line 112.

The communication request signal is input from the transmission buffer 20 to one input of the OR circuit 22 through the signal line 114. At this time, the other input of the OR circuit 22 is connected to the switching circuit 46.
Since no signal is being sent from the OR circuit 22, a communication request signal is output from the OR circuit 22 and sent to the network 50 through the signal line 116.

In the communication control device 14 or 01 on the called side in FIG. 2, a communication request signal from the communication control device 12 on the calling side is input from the network 50 to the reception buffer 40 through the signal line 138. In the communication control device 14 or 01 on the called side, the input communication request signal is input from the reception buffer 40 to the representative address number identification circuit 68 through the signal line 158. In this circuit, the representative address number communication control device 01 compares the unit number of the destination address portion of the communication request signal with the representative address number read from the representative address number storage circuit 76.

In this case, in the communication control devices 01 to 04 of the server 100,
The 0 representative address number identification circuit 68 whose representative address of the unit number matches the representative address number of its own station is the signal line 1
74 to disable the unit identification circuit 64.

Further, in the case of the communication control device 14 connected to the user terminal 14T, the unit identification circuit 64 is enabled by the signal line 174 if it is not called by the representative address number. In the unit identification circuit 64,
Communication control device 14 in which the unit number of the destination address part of the communication request signal is read from unit number storage circuit 66
is compared with the unit number, which is the address code of

In the communication control device 14 connected to the user terminal 14T, the unit identification circuit 64 identifies that the communication request signal is addressed to itself, that is, to the communication control device 14, based only on the information in the unit number field. In this case, since the communication request signal is addressed to the communication control device 14 of the terminal, the unit number in the destination address field is the unit number storage circuit 66.
It matches the unit number, which is the address code of the own station read from.

In the case of a representative address number, a communication request signal that does not match is output to the next stage.

As a result, the communication request signal input from the network 50 is transmitted from the unit identification circuit 64 to the signal line 1134.
The attribute identification circuit 60 confirms that the attribute number in the destination address part of the communication request signal is one of the attribute numbers stored in the attribute number storage circuit 82, and The attribute number signal included in this communication request signal is sent to the DTE interface selection circuit 24.
is output to.

The communication request signal output from the attribute identification circuit 60 is sent to the signal type identification circuit 32. is output to. Signal type identification circuit 32
At , the signal type display portion of the communication request signal is compared with the communication request code read from the communication request code storage circuit 34 . In this case, since the communication request signal is input, the communication request code matches the communication request code read from the communication request code storage circuit 34.

Therefore, an activation signal is output from the signal type identification circuit 32 to the acknowledgment signal generation circuit 18 through the signal line 120.

As a result, an acknowledgment signal is output from the acknowledgment signal generating circuit 18 to the OR circuit 16 through the signal line 110. At this time, the communication control device 14 on the called side or the communication request detection circuit 21 of the Ol is not detecting the communication request command signal, so the signal input from the communication request signal generation circuit 25 to the OR circuit 16 is "0". ” has been on the level. Therefore, the acknowledgment signal output from the acknowledgment signal generation circuit 18 is output from the OR circuit 16 and sent to the network 50 through the transmission buffer 20 and the OR circuit 22.

Also from the signal type identification circuit 32. A starting signal is output to the OR circuit 2B through the signal line 120.

Further, a communication request signal is outputted from the signal type identification circuit 32 on the second day of the signal type identification circuit. The communication request signal input to the signal type identification circuit 28 is compared with the acknowledgment code read from the acknowledgment code storage circuit 30 in the signal type identification circuit 28 . In this case, the communication request signal input from the signal type identification circuit 32 does not match the acknowledgment code, so the signal O is output from the signal type identification circuit 28 to the OR circuit 2B, and the signal type identification circuit 28
A heliset signal is output from the receiving buffer 40. This resets the reception buffer 40.

As described above, the activation signal from the signal type identification circuit 32 is outputted to the output of the OR circuit 26, and is sent to the DTE interface selection circuit 24 through the signal line 118.
The DTE interface selection circuit 24 is activated by this activation signal.

In the case of the communication control device 14 connected to the user terminal 14T, the DTE interface is selected in advance by a signal from the attribute identification circuit 80, that is, the DTE selected by the attribute number in the destination address part of the communication request signal. An instruction signal for connecting the interface to network 50 is sent to switching circuit 48 .

This causes the switching circuit 48 to connect the selected one of the DTE interfaces 42 and 44 to the network 50. For example, if the DTE interface 42 is selected, the switching circuit 48 connects the signal line 144 to the signal line 140 and the signal line 14B to the network 50. By connecting to signal line 138, DT
E-interface 42 is connected to network 50.

In this way, in the communication control device on the called side, the DT
E interface 42 or 44 is selected and connected to network 50. DTE interfaces other than the connected DTE interface are released.

The acknowledgment signal output from the transmission buffer 20 of the communication control device on the called side to the network 50 is input to the reception buffer 40 of the communication control device 12 on the calling side.

In the communication control device 12 on the calling side, the input acknowledgment signal is sent from the reception buffer 40 to the representative address number identification circuit B8 through the signal line 15B, but since no representative address number is used, the unit identification circuit 6
Sent to 4. In the unit identification circuit 84, the communication control device 1 on the calling side reads out the unit number in the destination address part of the acknowledgment signal from the unit number storage circuit 6B.
It is compared with the unit number which is the address code of 2. In this case, since the acknowledgment signal is addressed to the communication control device 12, the unit number in the destination address field matches the unit number read from the unit number storage circuit 66.

As a result, the unit identification circuit 64 transmits the acknowledgment signal input from the network 50 to the signal line IE14.
It is output to the attribute identification circuit 60 through. The attribute identification circuit 60 confirms that the attribute number in the destination address part of the acknowledgment signal matches one of the attribute numbers read from the attribute number storage circuit 62, and the signal with this attribute number is transmitted to the DTE via the signal line 172. It is output to the interface selection circuit 24.

The acknowledgment signal from the attribute identification circuit BO is output to the signal type identification circuit 32. In the signal type identification circuit 32,
The signal type display portion of the acknowledgment signal is compared with the communication request code read from the communication request code storage circuit 34. In this case, since the acknowledgment signal has been input, it does not match the communication request code read from the communication request code storage circuit 34. Therefore, from the signal type identification circuit 32, the signal &! No activation signal is outputted to the acknowledgment signal generation circuit 18 and the OR circuit 26 through 120.

Further, an acknowledgment signal is output from the signal type identification circuit 32 to the signal type identification circuit 2 . Signal type identification circuit 28
The input acknowledgment signal is compared with the acknowledgment code read out from the acknowledgment code storage circuit 30 in the signal type identification circuit 2. In this case, the acknowledgment signal input from the signal type identification circuit 32 matches the acknowledgment code. Therefore, an activation signal is output from the signal type identification circuit 28 to the OR circuit 26 through the signal line 122.

The activation signal from the signal type identification circuit 28 is outputted to the output of the OR circuit 26, and is sent to the []TE interface selection circuit 24 through the signal line 118. [The TE interface selection circuit 24 is activated by this activation signal,
The DTE interface selected in advance by a signal from the attribute identification circuit 60, that is, the DTE interface 42 selected by the communication control equipment 12 on the calling side.
Alternatively, an instruction signal for connecting 44 to network 50 is sent to switching circuit 46 .

By completing the above operations, the calling side user terminal 12T in FIG. Server on the side! They are each connected to the network 50 via the communication control device 01 of 00, and network communication becomes possible.

In addition, in a third communication control device other than the calling side and the called side, a communication request signal or acknowledgment is sent from the network 50 through the reception buffer 40 in FIG. A signal is input to the representative address number identification circuit 6, but the representative address number 1 does not match or does not exist, so the unit identification circuit 64 is enabled. The separate unit a port 84 compares these input signals with the unit number, which is the address code of its own station, sent from the unit number storage circuit 66, and determines that the signals are not addressed to its own station. The unit identification circuit 64 thereby sends a reset signal to the reception buffer 40 through the signal line 166, and discards input signals that are not addressed to its own station. The unit identification circuit 64 does not output the signal input from the network 50 to the attribute identification circuit 60.

By performing such processing in the third communication control device other than the calling side and the called side, communication request signals or acknowledgment signals not addressed to the own station are discarded.

According to this embodiment, the attribute number included in the communication request signal on the called side and the acknowledgment signal on the calling side is identified by the attribute identification circuit 80, and the identified attribute number is
The signal is sent to the TE interface selection circuit 24, and the 0↑E interface selection circuit 24 selects one of the DTE interfaces 42 or 44. By identifying a communication request signal or an acknowledgment signal addressed to the own station in the signal type identification circuit 32 or 28, the DTE interface selection circuit 24 is activated, which switches the switching circuit 46 to select the selected DTE interface 42 or 28. 44 to the network 50.

Therefore, depending on the attribute number included in the communication request signal or acknowledgment signal, the DTE interface 42 or 4
4 can be selected and connected to the network 50, there is no need to install a communication control device for controlling the connection with the network 50 for each DTE interface 42 and 44. Since it can be controlled by a single communication control device, space can be saved and the power supply capacity can also be reduced. In addition, the communication control device can be connected to a different DT.
There is no need to design each E-interface.

According to this embodiment, a specific D is specified by specifying an address value.
Since the path for the TE interface is fixed, the path between a specific device and a specific DTE-DGE interface among multiple DTE-ROCE interfaces of multiple communication control devices connected to an amorphous communication network is fixed. End-to-end connections can be made without mutual errors. In addition, in the communication control device, different D
Even when a plurality of TE-DCE interfaces are used, it is possible to connect the same type of interfaces of the DTE-DGE interfaces at both ends to each other without error. Moreover, only the calling side needs to specify the specific DTE interface to be connected, and the operator on the called side does not need to specify the DTE interface. It is easy to operate as there is no need to contact by phone.

Furthermore, with the generation and identification function of a representative address number,
You can select one of the available ports of servers, etc. that have a representative address number, making terminal operation more efficient and helping to reduce traffic on unstructured communication networks. Of course, like the representative number, it can be used to create multiple terminals with high traffic.

As described above, according to the control device of this embodiment, various communication devices with different signaling systems can be connected to the network via the DTE interface, so that the scope of application of the network is expanded.

兇-1 According to the present invention, the communication control device, in which the address number of a terminal is composed of a unit number and an attribute number, has a terminal interface that connects various communication means of the terminal and converts the signals into a network signaling system. and switching means for selecting this. With this numbering system and hardware configuration, the unit number specifies the other terminal and the attribute number specifies the communication method of that terminal, allowing multiple communication between terminals using various communication methods, expanding the scope of the communication network. do. Furthermore, the unit number is composed of an individual address number or a representative address number, the former performs conventional point-to-point communication of user terminals, and the latter is used to select among a plurality of vacant boats that provide the same predetermined service.
With the 0 representative address number and terminal interface functions that allow any one to be connected with simple operations, it is easy to introduce online computer communication systems that use message storage functions such as various servers and electronic bulletin boards, which will be increasingly used in the future. It can be carried out.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of a communication control device according to the present invention. FIG. 2 is a schematic configuration diagram showing a system in which the device of FIG. 1 is applied to network communication. FIG. 3 is a diagram showing an example of signals transmitted and received through the device. Part code explanation 20... Transmission buffer 21... Communication request detection circuit 23... Destination address number generation circuit 24... DTE interface selection circuit 28.32.
... Signal type identification circuit 30 ... Acknowledgment code storage circuit 34 ... Communication request code storage circuit 40 ... Reception buffer 42.44 ... DTE interface 48 ... Switching circuit 50 ... Network 60 ...Attribute identification circuit 82...Attribute number storage circuit 64...Unit identification circuit 6B...Unit number storage circuit 68...Representative address number identification circuit 76...Representative address number storage circuit

Claims (1)

[Claims] When an outgoing signal is received, the outgoing signal is transmitted to a route other than the direction in which the outgoing signal was received, and the direction that first receives the incoming signal returned in response to the outgoing signal is A communication control device connected to an amorphous communication network that connects a route to a route that received the outgoing signal, the communication control device being assigned an address number in the amorphous communication network, and connecting at least one terminal to the amorphous communication network. In a communication control device for an amorphous communication network that controls the transmission and reception of signals between storage means for storing; a comparison means for receiving the outgoing signal from the amorphous communication network and comparing the address number included in the outgoing signal with the representative address number; A communication control device for an amorphous communication network, comprising: control means for returning the return signal to the amorphous communication network when the address number included in the outgoing signal matches the representative address number. .