JPH0250638A - Communication system - Google Patents

Abstract

PURPOSE:To attain the communication of two calls per one information channel in 64kbps between specific terminal equipments having a 2-voice 64k coding/decoding section by exchanging user information via each control signal coding/decoding section between terminal equipments and controlling the coding/decoding system so as to be made coincident thereby applying the communication. CONSTITUTION:The plural 1st terminal equipments 10, 11 having a one voice 64k coding/ decoding section 1, a two voice 64k coding/decoding section 2, a switch 4 and a switching control section 5 are connected to an exchange network 20 connecting to a 2nd terminal equipment 12 having a one voice 64k coding/decoding section 1-1 and a control signal coding/ decoding section 3-1, and in the case of implementing communication between terminal equipments, the information of the coding/decoding system provided respectively on a control signal coding/decoding section 3 is exchanged via a control signal coding/decoding section and both the terminal equipments are controlled so that the coding/decoding system is made coincident on each other. That is, in the case of the 1st terminal equipments 10, 11 both having the one voice 64k coding/decoding section 1 and the two voice 64k coding/decoding section 2, a switch 4 selects the two voice 64k coding/decoding section 2 under the control of a changeover control section 5 and communication is implemented by using the two voice 64k coding/decoding section 2.

Description

[Detailed Description of the Invention] [Summary] Concerning a communication method using the basic interface of l5DN, communication that allows not only communication of one call per 1 information channel of 64 Kbps, but also communication of two calls between specific terminals. For the purpose of providing a system, there is a code/decoder for one voice 64, a code/decoder for two voices 64, and a control signal code/decoder that encodes and decodes call control information and user-to-user information with the other terminal. and an encoding/decoding unit for the first audio 64 and the second audio
A plurality of first terminals each have a switch that switches between the audio 64 and the code/decoder, and a switching control unit that controls the switch based on user information. The first voice 64 is connected to a switching network that connects a second terminal having a decoding section, and between the terminals, the one voice 64
The terminals exchange information on whether the two voices 64 have a code/decoder and the two voices 64 have a code/decoder, or only the one voice 64 has a code/decoder, and both terminals use the same code/decoder method. and configure it to control and communicate.

[Industrial application field]

This invention is digital service integration! (hereinafter referred to as 15DN) using the basic interface of 64Kbps
The present invention relates to a communication system that enables not only communication of one call but also communication of two calls with a transmission capacity of .

Note that the technology for encoding audio signals into 32Kbps digital signals has already been established, and two 32Kbps
The coded signal is multiplexed into the digital signal of 64
The technology for converting to a 7K bps digital signal has already been established.

[Conventional technology]

A conventional example will be explained below using figures.

Figure 5 is a block diagram of a conventional communication system, in which the exchange 'kN
2 shows an example where terminals 12-3 to 12-6 are connected.

In the figure, 7-7 to 7-10 are called party number setting units, 35 to 38 are handsets, 1-7 to 1-10 are code/decoding units for l voice 64, and 3-4.3-5 is for 16. Code/decoding section, 6-4.6
-5 is a demultiplexing unit, 2o is a switching network, 12-3 to 12-6
indicates a terminal.

The basic interface of l5DN is 2B+D (B is 64K
bps information channel) and D are 16Kbps control channels), and circuit switching is performed using the D channel.

In FIG. 5, the coding/decoding unit 1-7 encodes and decodes a voice signal into a 64 Kbps digital signal into a single voice 64, the handset 35 encodes call control information, and user/user information with the other party's terminal. A terminal 12-3 includes a called number setting section 7-7 that sets the called called number decoded by the code decoding section 3-4 to the 16 to be decoded, and a terminal 12-4 having the same configuration. The code/decoder 3-4 demultiplexes the signals from these terminals into 16 bits of 16Kbps, which codes and decodes the call control information of these terminals 12-3 and 12-4 and the user-to-user information with the other terminal. It is connected to the exchange 'fi 420 via the demultiplexer 6-4.

Father, with the same configuration as above, terminal 12-5.12-6.1
6, a code/decoder 3-5 is connected to the exchange WI 20 via a demultiplexer 6-5.

Here, for example, to explain the case where a call is made between the terminal 12-3 and the terminal 12-5, the code/decoder 3-4 is
and 3-5 using the D channel, and are connected via the switching network 20 by call control messages (call setting, ringing, answering, disconnection, release, 9 calling number, 1 called number, etc.), and the handset 35.1
The audio 64 is encoded and decoded by the encoder 1-7. Demultiplexer 6-4. Switching network 20, demultiplexing section 6-5.1, audio 64, encoding/decoding section 1-9. Using the B1 channel in the route of the handset 37, a call is made between the handsets 35 and 37.

[Problem to be solved by the invention]

However, in the above conventional communication method, 64Kbp
There is a problem that only one call can be communicated per one information channel of S.

An object of the present invention is to provide a communication system that allows not only communication of one call per 64 Kbps information channel, but also communication of two calls between specific terminals.

[Means to solve the problem]

FIG. 1 is a block diagram of the principle of the present invention.

As illustrated in FIG.
and a coding/decoding unit 2 which encodes each of the two audio symbols into 32 Kbps digital signals, multiplexes them, converts them into 64 Kbps information, and separates and decodes the two audio signals 64; call control information and user/user information; a control signal code decoder 3 that encodes and decodes a control signal, a switch 4 that switches between the code and decoder 1 for the one voice 64 and the code and decoder 2 for the two voices 64, and the switch 4 according to user information. A plurality of first terminals 10 and 11 each have a switching control section 5 for controlling a plurality of first terminals 10 and 11. Connect to the connected exchange y420.

Then, between the respective terminals, the code/decoder 1 is provided for 1 voice 64 and the code/decoder 2 is provided for 2 voices 64, or the code/decoder 2 is provided for 1 voice 64 as user information via the respective control signal code/decoders. Information on whether the terminal has only the code/decoder l-1 is exchanged, and both terminals are controlled so that their code/decoding methods match to perform communication.

[For production]

According to the present invention, for one voice 64, the code/decoder 1 and the 2
A plurality of first terminals 10.11 each have a code/decoder 2, a switch 4, and a switching control unit 5 for each voice 64, and a code/decoder 1-1 and a control signal code/decoder for each voice 64 A switching network 2 connecting a second terminal 12 having a section 3-1
0 and communicate between each terminal, ■Audio 6 is transmitted as user information via each control signal encoder
4 exchanges information on whether the code/decoder 1 and 2 audio 64 have the code/decoder 2 or whether the 1 audio 64 has only the code/decoder 1-1, and both terminals use the code/decoder method. control so that they match.

That is, when both communicating terminals are first terminals 10 and 11 having an encoding/decoding section 1 for one voice 64 and an encoding/decoding section 2 for two voices 64, both terminals are controlled by the switching control section 5. The switcher 4 selects the encoder/decoder 2 side for the 2 voices 64, and the call is made using the encoder/decoder 2 for the 2 voices 64, so the communication for the 2 calls is performed using 1 information channel of 64 Kbps. I can do it.

For example, the first terminal 10 which has the code/decoder 1 for one voice 64 and the code/decoder 2 for two voices 64,
On the other hand, if the second terminal 12 has only the encoder/decoder 1-1 for one voice 64, then in the first terminal 10, the switch 4 controls one voice 64 under the control of the switching control section 5. Then, the code/decoder 1 side is selected, the code/decoding method is matched, and a call is made.

In this case, 1 information channel per 64Kbps
This will be a phone call communication.

Therefore, it is possible to communicate not only one call per 64 Kbps information channel but also two calls between specific terminals.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 is a program diagram of a communication system according to an embodiment of the present invention, FIG. 3 is a diagram showing an example of user information, and FIG. 4 is a program diagram of a switching signal output section of an example of a switching control section. It is a diagram.

In the figure, 7-1 to 7-6 are called party number setting units, 21 to 34 are handsets, 1-1 to 1-6 are 1 voice 64, an encoding/decoding unit, 2
-1 to 2-4 are code/decoder units for 2 voices 64, 4-1 to 4
-4 is a switch, 6-1 to 6-3 are demultiplexers, and 3-1 to 6-3 are demultiplexers;
3-3, 16 is a code/decoding unit, 5-1.5-2 is a switching control unit, 20 is a switching network, 10-1.10-2.11-1.
11-2.12-1.12-2 indicates a terminal.

In FIG. 2, a coding/decoding unit 1-1 encodes and decodes one audio signal into a 64Kbps digital signal.
．． A handset/receiver 21 connected thereto, a code/decoder section 2-1. Handset 2 connected to this
2.23 and a switch 4-1 for switching between the code/decoder 1 for the one voice 64 and the code/decoder 2 for the two voices 64, and a called number setting unit 7 for setting the called number of the terminal 10-1. -1
A terminal 10-1 using a 54 Kbpsl information channel B1 is connected to a demultiplexer 6-1.

Furthermore, a terminal 10-2 having the same configuration and using a 64 Kbpsl information channel B2 is connected to the demultiplexer 6-1.

Further, the code/decoder 3-1 is demultiplexed by the demultiplexer 6-1, which uses the 16 KbpS D channel, to code and decode the call control information and user-to-user information of the terminals 10-1 and 10-2.
1 and is connected to a switching network 20.

Also, with the same configuration, 64Kbp
s 1 information channel B1. Terminal 11-1 using B2
．． 11-2 and 16 using a 16 Kbps D channel, a code/decoder 3-2 is connected to the exchange y420.

Further, each voice 64 is encoded and decoded by the encoder/decoder 1-5. The telephone receiver 331 connected to this consists of the called party number setting section 7-5 and is 64K.
Terminal 12-1 that uses one bps information channel B1, terminal 12-2 that has the same configuration and uses one 64 Kbps information channel B2, and call control information and users of terminal 12-1.12-2 Encoding and decoding information 1
A 16-bit code/decoder unit 3-3 using a 6 Kbps D channel is connected to the exchange 420 via a demultiplexer unit 6-3.

In accordance with the I5DN specifications, the call control message that is code-decoded by the code-decoder 3-1.3-2.3-3 in 16 includes transmission information from the transmitting side, as shown in Figure 3 (A). l5D
N (in FIG. 2, the switching network 20) can add user-to-user information that can be passed to the receiving side without being processed.

This user/user information is as shown in Figure 3 (B).
It consists of bits, followed by an information element identifier indicating that it is user information, a user/user content length indicating the length of the information, a protocol identifier, and user information.

As for the user information in this case, as shown in Figure 3(C), the audio encoded information (8 vias) is divided into two, with the 5th to 8th bits being for the Bl channel, and the 1st to 4th bits being for the Bl channel. For the B2 channel, write 1 in the 6th and 2nd bits if it is a response signal, write 1 in the 8th and 4th bits if the 1 voice 64 has an encoder/decoder, and write 1 in the 8th and 4th bits. If the two voices 64 have an encoder/decoder, l is written in the th and 3rd bits.

Furthermore, the circuit for outputting the switching signal of the switching control section 5-1, 5-2 is as shown in FIG. 4(B) when called by the other party, and as shown in FIG. 4(A) when called. , since the own terminal has a coding/decoding unit for 2 voices 64, the 32 Kbps of the encoded voice information of the own terminal is always level, and when called by the other party, the encoded voice information shown in FIG. 3(C) is transmitted. If the 7th bit or 3rd bit of
-2, 4-3, 4-4), 2 voices 64
The calling side switches to the encoder/decoder at the same time, and on the calling side, the 6 digits shown in FIG.
If the 1st or 2nd bit is 1, and the 7th or 3rd bit of the encoded audio information is 1, the AND circuit shown in (A) outputs the level, and the switch (4-1, 4-
2.4-3.4-4) is switched to the encoder/decoder for 2 voices 64.

Therefore, for example, if terminal 1O-1 is the calling side, terminal 11-1
When communicating with the encoded voice information shown in FIG.
The data is connected to the switching network 20 via the switching network 20, and sent to the code decoding unit 3-2 at 16.

Then, the switching control unit 5-2 causes the code decoding unit 3-16 to
Since the 7th bit of the audio encoded information of the user information decoded in step 2 is 1, the AND circuit shown in FIG. .

At this time, at 16, the code/decoder 3-2 returns the 8°7.6th bit of the encoded voice information of the user information as 1, as shown in FIG. 3(C).

Then, the 8.7.6th bit of the audio encoded information of the user information decoded by the encoder/decoder 3-1 is 1 at 16, so the switching controller 5-1 switches to (A) in FIG. The AND circuit shown in FIG. 1 outputs a rubel, and the switch 4-1 is set to the dotted line side.

Therefore, the encoder/decoder units 2-1 and 2-3 are connected to the 2-audio 64, and 2 calls can be made simultaneously between the handsets 22, 23 and 28°29 using 1 information channel B1 of 64 Kbps. .

When the terminal 10-1 is the calling side and there is a call with the terminal 12-1, the 7th bit of the audio encoded information of the user information returned from the terminal 12-1 is 0, so the switching control unit 5- The output from 1 is at 0 level, and the switch 4-1 is on the solid line side.

Therefore, in this case, encoder/decoder units 1-1 and 1-5 are connected to one voice 64, and 64Kbp is transmitted between handsets 21 and 33.
One call can be made using one information channel of S.

〔Effect of the invention〕

As explained in detail above, according to the present invention, 64Kbps
Not only can one phone call be made per one information channel, but also two calls can be made between specific terminals each having an encoder/decoder for two voices 64.

[Brief explanation of the drawing]

Figure 1 is a block diagram of the principle of the present invention, Figure 2 is a block diagram of a communication system according to an embodiment of the present invention, and Figure 3 is a block diagram of the principle of the present invention.
FIG. 4 is a block diagram of a switching signal output section of a switching control section as an example, and FIG. 5 is a block diagram of a conventional communication system. In the figure, 1.1-1 to 1-10 are code/decoding units for one voice 64, 2.2-1 to 2-4 are code/decoders for two voices 64, 3 is a control signal code/decoder, 3-1 to 3-5 have a code/decoder in 16, 4.4-1 to 4
-4 is a switching device, 5.5-1 to 5-2 are switching control units, 6-1 to 6-5 are demultiplexing units, 7-1 to 7-10 are called number setting units, 0, 10-1 ．． 10-2. 11. 11-1.
12.12.12-1.12-2 is a terminal, 0 is a switching network, and 1 to 38 are handsets.

Claims (1)

[Claims] 1 audio 64K encoder/decoder (1) that encodes and decodes 1 audio signal into a 64 Kbps digital signal, and encodes 2 audio signals into 32 Kbps digital signals, multiplexes them, converts them into 64 Kbps information, and separates and decodes them. a two-voice 64K code decoding unit (2) that encodes and decodes call control information and user-to-user information with the other terminal; A plurality of first A switching network ( 20
), and between the respective terminals, the 1-audio 64K code decoder (1) and the 2-audio 64K code decoder (2) are transmitted as user information via the respective control signal code decoders. The device exchanges information on whether it has the same audio 64K code/decoder (1-1) or only the one audio 64K code/decoder (1-1), and controls and communicates so that the code/decoding methods of both terminals match. communication method.