JPH0846646A - Inter-network connector - Google Patents

Abstract

PURPOSE:To attain the communication between terminal equipments in each network through the inter-network connection between ATM networks using the same or different form of cells employing different voice coding systems. CONSTITUTION:Terminal equipments in two ATM networks 302, 106 make communication. The networks 302, 106 send it that communication channels 402,206 routing the networks 302, 106 are connection object channels and each voice coding system employed by each all to a signal transmitter-receiver 202 through a control channel. A control circuit 403 checks the signal sent to the transmitter-receiver 202 and selects a required converter among coding system converters 401-1 to 401-n based on the combination of the voice coding systems used by each call. Then ATM switches 402-1, 402-2 are used to connect the channels 404, 206 to the coding system converter selected earlier.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection system for making a call connection between networks having different voice encoding systems.

[0002]

2. Description of the Related Art FIG. 1 shows a connection between a conventional non-ATM network and an ATM network. 101 is ATM network and non-AT
This is a conventional inter-network connection device for connecting the M network. Thick line arrows extending from 101 indicate line bundles, and dotted lines indicate control lines. Reference numeral 102 is a non-ATM network, and 103 is an ATM network. It is assumed that the control line extending from the inter-network connection device 101 is connected to a call control node for a call for inter-network connection in each network. 104 is a communication terminal of the non-ATM network 102, and 105
Is a communication terminal of the ATM network 103. FIG. 2 is a functional explanatory diagram of the inter-network connection device 101 of FIG. In this figure, the same symbols as those in FIG. 1 indicate the same things. 201
Is a non-ATM line switch, which terminates line bundles from both networks and performs connection processing. Reference numeral 202 denotes a control signal transmitting / receiving device, which terminates the control line. Reference numeral 203 is a control device for controlling each function of the connection device 101, and 204 is a conversion circuit between the non-ATM line and the ATM cell, which is attached to the line to the ATM network. Reference numerals 205 and 206 denote one line of each line bundle. In particular, 206 indicates a cell flow from the conversion circuit 204 on the network 103 side, and the switch 20
On the 1st side, a non-ATM line is shown. A conventional technique will be described with reference to FIGS.

Non-ATM network 102 and ATM network 1 in advance
The network connecting devices 101 are installed at all the connection points 03. First, each terminal 1 of the non-ATM network 102 and the ATM network 103
Suppose that 04 and 105 are to communicate. Each network first determines a different line connection point by a process of searching for an appropriate network connection point. Suitable conditions are preset between networks. The networks 102 and 103 route the calls of the terminals 104 and 105 to the connection device 101 which is a connection point. In FIG. 2, reference numerals 205 and 206 denote communication lines routed from the terminals 102 and 105 to the networks 102 and 103, respectively. Networks 102 and 103 are lines 205 and 206, respectively.
Is sent to the signal transmission / reception device 202 using a control line. The control circuit 203 is the signal transmitting / receiving device 202.
The line 205 and 206 are connected by using the switch 201 by observing the signal sent to. The conversion circuit 204 mutually converts the information in the communication line into a non-ATM information string and an ATM cell, whereby the terminals 104 and 105 are connected to each other via a network.

[0004]

By the way, in the case of voice communication or the like in the conventional system, consideration is given to a case where the voice coding system used in the non-ATM network 102 and the voice coding system used in the ATM network 103 are different. However, the connection between the non-ATM network and the ATM network is performed only by replacing the data. Also, no consideration is given to the case where the network 102 is an ATM network of a type using cells having a different form from the ATM network 103. Therefore, the net 102 and the net 1
In the case of an ATM network using cells having different or different voice coding schemes 03, the terminals in each network cannot communicate by the conventional scheme.

An object of the present invention is to provide mutual connection between ATM networks using cells of the same or different forms having mutually different voice coding systems, and between ATM networks and non-ATM networks. It enables communication between terminals in the network.

[0006]

In order to achieve the above object, the invention of claim 1 uses two ATMs which use cells of the same or different forms using different voice coding schemes.
In the inter-network connection control device of each network existing at the connection point between the network or the ATM network and the non-ATM network, a conversion circuit having a voice coding conversion function corresponding to a combination between the voice coding systems used in each network. , When a call connecting between networks occurs, a transmission / reception device which receives a notification of the voice encoding method of each call from the control line together with the call connecting each network, and a voice encoding method of each call from the transmission / reception device A control device that receives the notification and selects the conversion circuit, and a switch that connects the communication circuit to be connected to both networks to the conversion circuit selected by the control device to realize inter-network connection. It is an inter-network connecting device.

Further, the invention according to claim 2 is one in which two ATM networks using cells of the same or different forms using different voice coding systems or each network existing at a connection point between an ATM network and a non-ATM network are used. In the inter-network connection control device, a conversion circuit having a voice coding conversion function corresponding to a combination of voice coding systems used in each network, and connection of each network when a call connecting the networks occurs. A transmission / reception device that receives a call from a control line, a coding system determination device that reads a transmitted code and determines a coding system, and a control device that selects the coding system determination device and the conversion circuit.
The encoding system discrimination device selected by the control device or the conversion circuit includes a switch for connecting a communication line to be connected to both networks, and the control device encodes which line is encoded when a call occurs. Whether the audio is encoded by a method is determined by the encoding method determination device, the conversion circuit that converts the determined encoding method into the code of the connection partner is selected, and the conversion circuit selected by the switch is selected. The inter-network connection device is characterized by realizing inter-network connection by connecting to a connection target communication line.

[0008]

According to the present invention, ATM networks having mutually different voice coding systems or ATM networks using cells of different forms or between ATM and non-ATM are connected to each other. It is possible to enable communication between terminals in the network, and it is possible to perform flexible system design in which each network is not limited to a fixed system. Also, a local special ATM network can be handled as a part of the network.

[0009]

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

FIG. 3 shows an embodiment of the present invention. FIG. 3 shows a connection configuration of two ATM networks. 106,
Reference numeral 108 denotes an ATM network similar to that shown in FIG. 1 and a communication terminal therein. 400 is an ATM inter-network connection device of the present invention, and 302 is 1
An ATM network using a voice encoding method different from that of 06 or using a cell of a different form (for example, length), 303
Is a communication terminal in the ATM network 302.

FIG. 4 shows an ATM inter-network connection device 40 of the present invention.
It is a functional block diagram of 0. In FIG. 4, 106,2
02, 206 and 302 are the same as those used in FIG. 1, FIG. 2 and FIG.
A communication line of the terminal 108 and an ATM network. 401 is the net 1
No. 06 is a mutual conversion circuit between the speech coding scheme used in the network 302 and the speech coding scheme used in the network 302, and each coding scheme can be used in each network (n
Street) indicates that a circuit exists. The required type of conversion circuit depends on the number of combinations of voice coding systems used in the ATM network. 402-1, 40
Reference numeral 2-2 is an ATM switch compatible with the ATM system of the ATM networks 302 and 106. Reference numeral 403 is a control device. FIG. 5 is a block diagram showing the configuration of the mutual conversion device 401 of FIG. In FIG. 5, 106, 302, 402-
Reference numerals 1 and 402-2 are the same as the reference numerals used in FIGS. 1, 3 and 4, respectively, and are an ATM network and an ATM switch. 501 and 502 are ATM networks 302 and 502, respectively.
This is a cell disassembling and assembling circuit that extracts an information part from the ATM cell used in 106 and converts it into a code string. Reference numeral 503 is a conversion circuit that converts the extracted coded string into a mutual coding method. The operation of the embodiment of the present invention will be described with reference to FIGS.

The inter-network connection device 400 of the present invention is installed in advance at all connection points of the two ATM networks 302 and 106. In FIG. 3, two ATM networks 302 and 106 are provided.
It is assumed that the internal terminals 303 and 108 are to communicate with each other. Similar to the conventional method, each network first searches for an appropriate inter-network connection point to determine the connection point. Suitable conditions are preset between networks. The networks 302 and 106 connect the calls of the terminals 303 and 108 to the inter-network connection device 4 which is a connection point.
Routing to 00. In FIG. 4, the network 302,
Reference numeral 106 indicates that the communication lines 404 and 206 that have routed the networks 302 and 106 from the terminals 303 and 108 are the connection target lines and that the voice coding method used by each call is transmitted and received using a control line. Send to device 202.
The control circuit 403 looks at the signal sent to the signal transmission / reception device 202, and first, based on the combination of the voice coding systems used in each call, the coding system conversion device 401.
Select the required converter from -1 to n. Then line 4
04 and 206 to ATM switches 402-1 and 402-2
To connect to the previously selected encoding method converter. In FIG. 5, lines 404 and 206 connected to the mutual conversion device 401 are respectively terminated to cell disassembly / assembly circuits 501 and 502 for extracting information from ATM cells,
Information can be arranged in a code string according to each voice encoding method. The conversion circuit 503 receives the mutual code strings from the cell disassembling and assembling circuits 501 and 502, mutually converts the coding method into the speech coding method used in the partner network, and recreates the code string. The code string after conversion of the code string received from 502 is then passed to the conversion circuit 503, and the code string after conversion of the code string received from the conversion circuit 503 is
It is delivered to the cell disassembly / assembly circuit 502. The cell disassembling and assembling circuits 501 and 502 respectively insert the code strings received from the converting circuit 503 into the information part of the cell, and the lines 404 and
Send to 206. In this way, the terminals 303 and 108 can communicate with each other across the encoding method conversion device. Further, in the cell disassembly / assembly circuits 501 and 502,
The received voice code is transmitted in the form of cells used in each ATM network. This allows ATM
Conversion of cell form between networks is also performed.

By the way, in this embodiment, two ATMs are used.
Although the net comes out, this division is just the division seen from the ATM system and does not indicate the range of defense of the network provider. In some cases, one network provider may support two ATM systems, which is also within the scope of this embodiment.

Although the above embodiment has been described with respect to the connection between ATM networks, one ATM switch is also referred to as a non-ATM line switch for the connection between the ATM network and the non-ATM network shown in FIGS. 1 and 2. It is clear that this can be applied.

FIG. 6 shows an ATM according to another embodiment of the invention.
3 is a block diagram illustrating an inter-network connection device 600. FIG. 60
Reference numeral 1 is a coding system discriminating device which reads a code sent in a cell to the ATM inter-network connecting device 600 and judges the coding system. Reference numeral 603 is a control device. 106, 20
6,302,402-1,402-2,404,50
1, 502 are the same as those in FIG. 1, FIG. 2, FIG. 3, and FIG. 4, and are the ATM network, the communication line of the terminal 108, and the ATM, respectively.
Network, ATM switch, communication line of terminal 303, network 302
A cell assembling / distributing circuit corresponding thereto, and a cell assembling / disassembling circuit corresponding to the network 106. FIG. 7 is a block diagram for explaining the function of the coding method discrimination device 601 of FIG. In FIG. 7, 70
Reference numeral 1 denotes a coding system discrimination circuit which discriminates a coding system from communication information. The operation of another invention will be described with reference to FIGS.

Terminal 3 in the two ATM networks 302 and 106
After the communication of 03 and 108, the network 30
2, 106 from terminals 303 and 108 to networks 302 and 106
That the communication lines 404 and 206 that have been routed to
The process up to sending is the same as the invention described in FIG. 4 above.

In the present invention, the control circuit 603 looks at the signal sent to the signal transmitting / receiving apparatus 202, and first connects the respective lines 404 and 206 to the ATM switches 402-1 and 40-4.
2-2 is used to connect to the coding method discrimination circuit 601.
In parallel with this processing, the control circuit 603 controls the signal transmitting / receiving device 2
02 to start communication of the terminals 303 and 108 to each network, send a dummy call pattern, or send a control signal to send information capable of determining the coding method of each network in the communication line. Send out.

In FIG. 7, an encoding system discrimination circuit 601 is provided.
The lines 404 and 206 connected to are terminated in cell disassembly and assembly circuits 501 and 502 for extracting information from ATM cells, respectively, and the information is arranged into code strings according to the respective voice coding systems. The coding method discriminating circuit 701 receives a code string from the cell disassembling and assembling circuits 501 and 502 and judges the coding method of the line. For this determination, the coding method of each line 404, 206 is determined by searching for an encoding method that can restore the communication content or the dummy call pattern, or by finding information that can determine the encoding method. To do. When the coding system discrimination device 601 discriminates the coding system of each line, it notifies the control circuit 603 of this. After that, the control circuit 603 selects the necessary conversion circuit 401 and switches the switch 4 in the same manner as the invention described in FIG.
The terminals 303 and 108 can communicate with each other across the coding method conversion device by connecting to the selected conversion circuit using 02-1 and 402-2.

Although the above embodiment has been described with respect to the connection between the ATM networks, the ATM switch may be a non-ATM line switch for the connection between the ATM network and the non-ATM network shown in FIGS. It is clear that it can be applied in.

By the way, in this embodiment, two ATM networks come out, but this division is only a division seen from the ATM system and does not indicate the range of protection of the network provider. In some cases, one network provider may have two ATs
The M method may be supported in some cases, but this is also included in the scope of this embodiment.

[0021]

As described above, according to the present invention,
ATM networks having mutually different voice coding systems, or between ATM networks using cells of different forms, or ATM
The inter-network connection between the network and the non-ATM network enables communication between terminals in each other's network, and allows each network to perform flexible system design not limited to a certain system. Also, a local special ATM network can be handled as a part of the network.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a connection system configuration of a conventional ATM network and a non-ATM network.

FIG. 2 is a block diagram showing a functional configuration of a conventional network connecting device.

FIG. 3 is a block diagram showing a connection structure between ATM networks of the present invention.

FIG. 4 is a block diagram showing a functional configuration of an inter-network connection device of the present invention.

5 is a block diagram showing a configuration of the conversion device of FIG.

FIG. 6 is a block diagram showing a functional configuration of an inter-network connection device of another invention.

FIG. 7 is a block diagram showing a configuration of the coding method discrimination device of FIG. 6.

[Explanation of symbols]

 101 Conventional inter-network connection device 102 Non-ATM network 103 ATM network 104 Communication terminal 105 Communication terminal 201 Non-ATM line switch 202 Control signal transmission / reception device 203 Control device 204 Conversion circuit between non-ATM line and ATM cell 205, 206 Each line One line of bundle 301 ATM inter-network connection device 302 ATM network 303 Communication terminal 400 ATM inter-network connection device 401 Mutual conversion circuit of voice coding system 402-1, 402-2 ATM switch 403 Control device 501, 502 cells Decomposing / assembling circuit 503 Conversion circuit for converting encoding system 600 ATM inter-network connection device 601 Encoding system discrimination device 603 Control device 701 Encoding system discrimination circuit

Claims (2)

[Claims] 1. An inter-network connection control device for two ATM networks using the same or different forms of cells using different voice coding systems, or an inter-network connection control device for each network existing at a connection point between an ATM network and a non-ATM network, A conversion circuit having a voice encoding conversion function corresponding to the combination of voice encoding methods used in each network, and when a call connecting between two networks occurs, the call connecting each network together with the call connecting each network is performed. A transmission / reception device that receives a notification of a voice encoding system from a control line, a control device that receives a notification of the voice encoding system of each call from the transmission / reception device, and selects the conversion circuit, and a conversion circuit selected by the control device An inter-network connection device having a switch for connecting a communication line to be connected to both networks and realizing inter-network connection. 2. An inter-network connection control device for each of the two ATM networks that use cells of the same or different forms using different voice coding systems or each network existing at the connection point between the ATM network and the non-ATM network, A conversion circuit that has a voice coding conversion function that corresponds to the combination of voice coding systems used in each network, and, when a call that connects between networks occurs, receives the call that connects between each network from the control line. A device, a coding system discriminating device for reading a transmitted code and discriminating a coding system, a control device for selecting the coding system discriminating device and the conversion circuit, and the code selected by the control device. A coding system discriminating device or a switch for connecting a communication line to be connected to both networks to the conversion circuit, and the control device encodes voice by a coding system of the line when a call occurs. Whether or not the encoding method is determined by the encoding method determination device, selects the conversion circuit that converts the determined encoding method into the code of the connection partner, and connects the conversion circuit selected by the switch to the connection target communication line. An inter-network connection device that realizes inter-network connection by doing so.