JPH05145644A - Voice multiplex connection system - Google Patents

Abstract

PURPOSE:To attain conference talking by utilizing effectively a resource of a digital exchange without provision of a special trunk. CONSTITUTION:One incoming channel 17U and plural outgoing channels 17D are provided between each subscriber circuit 11 and a network 12, each subscriber circuit is provided with an adder circuit 111 adding a transmission voice signal of other subscriber reached from the plural outgoing channels and using the sum as a received voice signal for its own subscriber, a conference talking among plural subscribers is attained by connecting the incoming channel from each subscriber circuit to the plural other subscriber circuits multiply in the network and a music reproduced from a music reproducing device 16 is added to the transmission voice signal from the other subscriber to superimpose the music onto the talking signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice multiple access system in a digital exchange. As one of the functions provided in a digital exchange, a conference call function that allows three or more subscribers to call each other has been put into practical use.

[0002]

2. Description of the Related Art FIG. 4 is a diagram showing an example of a conventional digital exchange. Digital exchange 1 shown in FIG.
Is a plurality of subscriber circuits 11 each containing a subscriber 2.
(Individual subscriber circuits are referred to as 11 ₁ , 11 ₂ , and 11 ₃ , the same applies hereinafter), a network 12 that connects the subscriber circuits 11 to each other, and a central control unit 13 that controls call setting for each subscriber 2 accommodated. And in addition to the main memory 14,
A three-way call trunk 15 that forms a conference call (three-way call) is provided between the three subscribers 2 and is connected to the network 12.

In the three-way call trunk 15, three sets of adder circuits 151 are provided. For example, when configuring a three-way call between the subscribers 2 ₁ , 2 ₂ and 2 ₃ , the central control unit 13 has the call paths p ₁₁ , p ₁₂ ,
p ₂₁ , p ₂₂ , p ₃₁ and p ₃₂ are set, and each subscriber circuit 1
Connect 1 ₁ , 11 ₂ and 11 ₃ to the three-way trunk 15.

In such a state, the adder circuit 151₁Is
Entry 2₁And 2₂To subscriber circuit 11₁And 1
1₂, And the communication path p₁₁And p_{twenty one}Is transmitted via
Transmission voice V_S1And V_S2Is added to the call path p₃₂and
Subscriber circuit 11₃Subscriber 2 via₃Received voice V_R3
And is transmitted as an addition circuit 151₂Is a subscriber 2₂Oh
And 2₃To subscriber circuit 11₂And 11₃, And
Channel p_{twenty one}And p₃₁Voice V transmitted via_S2
And V_S3Is added to the call path p₁₂And subscriber circuit 11
₁Subscriber 2 via₁Received voice V_R1Transmitted as
Further addition circuit 151 ₃Is a subscriber 2₃And 2₁From
Entrance circuit 11₃And 11₁, And the communication path p₃₁and
p₁₁Voice V transmitted via_S3And V_S1Add
Calculate and call path p_{twenty two}And subscriber circuit 11₂Add via
Entry 2₂Received voice V_R2To transmit as.

From the above, each subscriber 2₁Two₂And 2
₃Are two other subscribers 2 each ₂+2₃Two₃+2
₁And 2₁+2₂Sending voice V_S2+ V_S3, V_S3+ V_S1
And V_S1+ V_S2It becomes possible to listen to
Be done.

[0006]

As is clear from the above description, in the conventional digital exchange, the required number of subscribers to set up a three-way call connection among the subscribers 2 ₁ , 2 ₂ and 2 _3. It is necessary to provide the three-way call trunk 15, which impairs the economical efficiency of the digital exchange, and if the number of three-way call trunks 15 is limited, the number of three-way call connections exceeding the number of installations cannot be met. There was a problem.

On the other hand, in recent years, a comprehensive service digital network (I
With the spread of SDN), it is required for digital exchanges to be able to change the accommodated analog subscribers to digital (ISDN) subscribers simply by exchanging subscriber circuit units.

Since each digital (ISDN) subscriber can use a plurality of information channels (B channels) and control channels (D channels) (for example, 2B + D in the basic interface), the digital (ISDN) subscribers are The digital exchange capable of accommodating has to provide a plurality of information channels (B channels) and control channels (D channels) between each subscriber circuit and the network, but it does not allow analog subscribers to be accommodated. In the case of accommodation, only one information channel (B channel) is used between the analog subscriber circuit and the network, and the remaining information channel (B channel) is left idle so that resources are available. A problem that is not used for.

It is an object of the present invention to make it possible to make a conference call between a plurality of accommodated subscribers by effectively utilizing the resources of the digital exchange without providing a special conference call connection trunk. And

[0010]

FIG. 1 is a diagram showing the principle of the present invention. FIG. 1 (a) shows the principle of the present invention (claim 1), and FIG. 1 (b) shows the present invention (claim 1). The principle of item 2) will be shown.

In FIGS. 1 (a) and 1 (b), 11 is a subscriber circuit for accommodating transmission / reception channels 3 _S and 3 _R for transmitting transmission voice and reception voice from the subscriber 2, respectively, to one channel, and 12 Is a network interconnecting the subscriber circuits 11.

Reference numeral 111 is an adder circuit provided in the subscriber circuit 11 according to the present invention (claims 1 and 2). 16 is the network 1 according to the present invention (claim 2).
2 is a music playback device connected to 2.

The reference numeral 17 _U is for transmitting the transmission voice from the subscriber 2 from the subscriber circuit 11 to the network 12 between the subscriber circuit 11 and the network 12 according to the present invention (claims 1 and 2). 1 is an upstream channel.

Reference numeral 17 _D is for transmitting voices from a plurality of other subscribers 2 from the network 12 to the subscriber circuit 11 between the subscriber circuit 11 and the network 12 according to the present invention (claims 1 and 2). It is a downlink channel provided with a plurality of channels in order to be transmitted to.

[0015]

The adding circuit 111 adds the transmission voices from the plurality of other subscribers 2 transmitted from the network 12 via the plurality of downlink channels 17 _D to the subscriber (2) to be accommodated. Of the received voice is generated and transmitted to the reception channel 3 _R.

In the network 12, the uplink channel 17 _U from each subscriber circuit 11 is multiplexed with the downlink channel 17 _D of a plurality of other subscriber circuits 11 to make a call between a plurality of subscribers 2. It is possible.

The music reproducing device 16 reproduces music that has been recorded in advance and supplies it to the network 12 via the upstream channel 17 _U. The network 12 is, together with the uplink channel 17 _U from the subscriber circuit 11, by multiple access upstream channel 17 _U from the music reproducing device 16, making it possible superimposed music call between subscribers 2 mutually Is considered.

Therefore, a conference call can be made without providing a conference call trunk or the like in the digital exchange, and a service such as superimposing music on a call between the subscribers can be realized, and for a digital (ISDN) subscriber. To
The plurality of downlink channels provided between the network and the subscriber circuit are effectively used, and the economical efficiency and serviceability of the digital exchange are improved.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 2 is a diagram showing a digital exchange according to an embodiment of the present invention (Claim 1), and FIG. 3 is a diagram showing the present invention (Claim 2).
FIG. 3 is a diagram showing a digital exchange according to an embodiment of the present invention. The same reference numerals denote the same objects throughout the drawings.

First, a digital exchange according to an embodiment of the present invention (claim 1) will be described with reference to FIG. Figure 2
, A transmission channel 3 _S for transmitting the transmission voice V _S of the subscriber 2 is provided between each subscriber circuit 11 and the subscriber 2.
A receiving channel 3 _R for transmitting the received voice V _R of the subscriber 2 is provided with destined 1 channel, also between the subscriber circuit 11 and the network 12, subscriber sending voice V _S from the subscriber 2 One upstream channel 17 _U transmitted from the subscriber circuit 11 to the network 12 and two sets of downlink channels 17 _D transmitting the transmission voice V _S from the two other subscribers 2 from the network 12 to the subscriber circuit 11. (Note that the upstream channel provided between the subscriber circuit 11 ₁ and the network 12 is referred to as 17 _U1 , and the two sets of downlink channels are referred to as 17 _{D 11} and 17 _{D 12} . The same applies to the upstream and downstream channels associated with 11 ₂ and 11 ₃ .

Each subscriber circuit 11 is provided with an adder circuit 111. The internal circuit 113 shows various functions normally included in the subscriber circuit 11. Each adder circuit 111 adds the transmission voices V _S from the two other subscribers 2 transmitted from the two sets of downlink channels 17 _D , and forms an internal circuit 113 as the reception voice V _R to the accommodating subscriber 2.
Communicate to.

Normally, a silent signal is supplied to one of the downlink channels 17 _D , but in the case of realizing a three-way call connection, the following connection is set in the network 12.
When setting up a three-way call connection among the subscribers 2 ₁ , 2 ₂ and 2 ₃ the central control unit 13 is connected to the network 1
Set up speech paths p ₁₁ , p ₂₁ and p ₃₁ in 2.

Call path p₁₁Is the subscriber circuit 11₁Above
Channel 17_U1The subscriber circuit 11₂Downward channel
Le 17_D22And the subscriber circuit 11₃Downstream channel 17 to
_D31Multiple connection to and call path p_{twenty one}Is the subscriber circuit 1
1₂Upstream channel from 17 _U2The subscriber circuit 11₃What
Downstream channel 17_D32And the subscriber circuit 11₁Down to
Channel 17_D11Multiple connections to and call path p₃₁Is
Subscriber circuit 11₃Upstream channel from 17_U3The subscriber
Circuit 11₁Downstream channel 17 to_D12And the subscriber circuit 1
1₂Downstream channel 17 to_D21Multiple connection to and.

In this state, the subscriber 2₁Send from Channel
Le 3_S1Subscriber circuit 11 via₁Transmitted sound transmitted to
Voice V_S1Is the internal circuit 113₁To digital code
After conversion, the up channel 17_U1Via the network
Call 12 ₁₁And downlink channel 17
_D22Subscriber circuit 11 via₂Transferred to
Communication path p₁₁And downlink channel 17_D31Join via
Party circuit 11₃Transferred to.

Subscriber 2₂To transmission channel 3_S2Through
Therefore, the subscriber circuit 11₂Voice V transmitted to_S2Is
Internal circuit 113₂Converted to digital code by
Then up channel 17_U2To network 12 via
Forwarded, call path p_{twenty one}And downlink channel 17_D32Through
Therefore, the subscriber circuit 11₃And the call path p
_{twenty one}And downlink channel 17_D11Subscriber circuit 1 via
1₁Transferred to.

Subscriber 2₃To transmission channel 3_S3Through
Therefore, the subscriber circuit 11₃Voice V transmitted to_S3Is
Internal circuit 113₃Converted to digital code by
Then up channel 17_U3To network 12 via
Forwarded, call path p₃₁And downlink channel 17_D12Through
Therefore, the subscriber circuit 11₁And the call path p
₃₁And downlink channel 17_D21Subscriber circuit 1 via
1₂Transferred to.

In the subscriber circuit 11 ₁ , the adder circuit 1
11 ₁ is the digitally encoded transmitted voice V _S2 from subscriber 2 ₂ which is transferred via the downstream channel 17 _D11.
And the digitally encoded transmission voice V _S3 from the subscriber 2 ₃ transferred via the downlink channel 17 _D12 are added, and the addition result (V _S2 + V _S3 ) is digitally encoded reception voice V _S3. It was transferred to the internal circuit 113 ₁ as _R1, the internal circuit 113 _1, and the received audio V _R1 that are digitally encoded transferred from the addition circuit 111 ₁ and converted back to analog form, via the reception channel 3 _R1 subscriber Person 2 ₁ .

In addition, in the subscriber circuit 11 ₂ as well, the adder circuit 11 ₁₂ and the digitally encoded transmission voice V _S3 from the subscriber 2 ₃ transferred via the downlink channel 17 _{D2 1} and the downlink channel 17 2. _The internal circuit 113 is added with the digitally encoded transmission voice V _S1 from the subscriber 2 ₁ transferred via _D22 , and the addition result (V _S3 + V _S1 ) is taken as the digitally encoded reception voice V _R2. Transfer to ₂ ,
The internal circuit 113 ₂ inversely converts the digitally encoded received voice V _R2 transferred from the adder circuit 111 ₂ into an analog format and transmits it to the subscriber 2 ₂ via the reception channel 3 _R2 .

In addition, in the subscriber circuit 11 ₃ as well, the adder circuit 111 ₃ and the digitally encoded transmission voice V _S1 from the subscriber 2 ₁ transferred via the downlink channel 17 _{D3 1} and the downlink channel 17 3. _The internal circuit 113 is added with the digitally encoded transmission voice V _S2 from the subscriber 2 ₂ transferred via _D32 , and the addition result (V _S1 + V _S2 ) is taken as the digitally encoded reception voice V _R3. Transferred to ₃ ,
The internal circuit 113 ₃ inversely converts the digitally encoded received voice V _R3 transferred from the adder circuit 111 ₃ into an analog format and transmits it to the subscriber 2 ₃ via the reception channel 3 _R3 .

From the above, each subscriber 2 ₁ , 2 ₂ and 2
₃ is two other subscribers to each other 2 ₂ +2 ₃ , 2 ₃ +2 ₁
And 2 ₁ +2 ₂ transmitted voices V _S2 + V _S3 , V _S3 + V _S1 and V _S1 + V _S2 can be heard, and a three-way call is realized.

Next, a digital exchange according to an embodiment of the present invention (claim 2) will be described with reference to FIG. In FIG. 3, a subscriber circuit 11 accommodating each subscriber 2 and a set of music reproducing devices 16 are connected to the network 12.

In the music reproducing device 16, the digitally encoded music M is recorded in advance, and the central controller 13
By the control from, recorded music M is played,
It is supplied to the network 12 via the upstream channel 17 _U4 .

As in FIG. 2, one transmission channel 3 _S and one reception channel 3 _R are provided between each subscriber circuit 11 and the subscriber 2, and the subscriber circuit 11 and the subscriber circuit 11 are connected to each other. An upstream channel 17 _U of one channel and two sets of downstream channels 17 _D are provided between the network 12.

Each subscriber circuit 11 is provided with an adder circuit 111 in addition to the internal circuit 113, as described above. When the subscribers 2 ₁ and 2 ₂ listen to the music M and talk with each other, the central controller 13 sets up the communication paths p ₁₁ , p ₂₁ and p ₄ in the network 12 and at the same time The playback device 16 is activated.

The communication channel p ₁₁ is the upstream channel 17 _U1 from the subscriber circuit 11 _1, and the downward channel 17 _D21 to the subscriber circuit 11 _2, also speech path p _21, the subscriber circuit 1
The upstream channel 17 _U2 from 1 ₂ is connected to the downstream channel 17 _D11 to the subscriber circuit 11 _1, and the call path p ₄ is
The upstream channel 17 _U4 from the music reproducing device 16 is connected to the downstream channel 17 _D12 to the subscriber circuit 11 ₁ and the subscriber circuit 1
Multiplex connection to the downstream channel 17 _D22 to 1 ₂ .

In this state, the subscriber 2₁Send from Channel
Le 3_S1Subscriber circuit 11 via₁Transmitted sound transmitted to
Voice V_S1Is the internal circuit 113₁To digital code
After conversion, the up channel 17_U1Via the network
Call 12 ₁₁And downlink channel 17
_D21Subscriber circuit 11 via₂Transferred to.

Further transmit voice V _S2 transmitted from the subscriber 2 ₂ to the subscriber circuit 11 ₂ via the transmission channel 3 _S2 is
After being converted into a digital code by the internal circuit 113 _2, it is transferred to the network 12 via the upstream channel 17 _U2 and transferred to the subscriber circuit 11 ₁ via the speech path p ₂₁ and the downstream channel 17 _D11 .

Further, the digitally encoded music M reproduced from the music reproducing device 16 is transferred to the network 12 via the upstream channel 17 _U4 and the subscriber via the communication path p ₄ and the downstream channel 17 _D12. While being transferred to the circuit 11 ₁ , the speech path p ₄ and the downlink channel 17
It is transferred to the subscriber circuit 11 ₂ via _D22 .

In the subscriber circuit 11 ₁ , the adder circuit 1
11 ₁ is the digitally encoded transmitted voice V _S2 from subscriber 2 ₂ which is transferred via the downstream channel 17 _D11.
And the digitally encoded music M from the music reproducing device 16 transferred via the downlink channel 17 _D12 are added, and the addition result (V _S2 + M) is internally provided as the digitally encoded reception voice V _R1. circuit 113 ₁ transfers, the internal circuit 113 _1, adder circuits 111 ₁ to receive voice V _R1 that are digitally encoded transferred from inverse converted to analog form, the receiving channel 3 _R1 subscriber 2 ₁ via the To transmit.

In addition, in the subscriber circuit 11 ₂ as well, the adder circuit 111 ₂ and the digitally encoded transmission voice V _S1 from the subscriber 2 ₁ transferred via the downlink channel 17 _{D2 1} and the downlink channel 17 2. The digitally encoded music M from the music reproducing device 16 transferred via _D22 is added, and the addition result (V _S1 + M) is transferred to the internal circuit 113 ₂ as the digitally encoded received voice V _R2. Then, the internal circuit 113 ₂ inversely converts the digitally encoded received voice V _R2 transferred from the adder circuit 111 ₂ into an analog format and transmits it to the subscriber 2 ₂ via the receiving channel 3 _R2 .

From the above, the subscriber 2₁And 2₂Are mutual
Counter subscriber 2 with music M superimposed ₂And 2₁Send of
Voice V_S2+ M and V_S1+ M can be heard. More than
As is clear from the description, according to this embodiment, the digital
The exchange 1 has an adder circuit 11 provided in each subscriber circuit 11.
1 is used, and multiple connection channels are used in the network 12.
p₁₁, P_{twenty one}And p₃₁Three-way calling by setting
Realizes three-way call connection without providing a trunk 15.
In addition, the adder circuit 111 and the music reproducing device 16 described above are used.
And the communication path p in the network 12₁₁, P_{twenty one}And
And multiple connection channel p_FourBy setting
It enables superposed mutual calls.

It is to be noted that FIGS. 2 and 3 are merely examples of the present invention until now, and for example, when three or more information channels are prepared between each subscriber circuit 11 and the network 12. By making it possible to add three or more inputs to the adder circuit 111 provided in each subscriber circuit 11,
A conference call connection of four or more subscribers is possible, but the effect of the present invention does not change in such a case. It goes without saying that the digital exchange 1 which is the subject of the present invention is not limited to that shown in the drawings.

[0043]

As described above, according to the present invention, in the digital exchange, a conference call can be performed without providing a conference call trunk or the like in the digital exchange, and a service such as superimposing music on a call between subscribers can be provided. It becomes feasible and, moreover, for the digital (ISDN) subscriber, the plurality of downlink channels provided between the network and the subscriber circuit are effectively used, and the economical efficiency and serviceability of the digital exchange are realized. Is improved.

[Brief description of drawings]

FIG. 1 is a diagram showing the principle of the present invention, wherein FIG. 1 (a) shows the principle of the present invention (claim 1), and FIG. 1 (b) shows the principle of the present invention (claim 2).

FIG. 2 is a diagram showing a digital exchange according to an embodiment of the present invention (claim 1).

FIG. 3 is a diagram showing a digital exchange according to an embodiment of the present invention (claim 2).

FIG. 4 is a diagram showing an example of a conventional digital exchange.

[Explanation of symbols]

1 Digital Switch 2 Subscriber 3 _S Transmission Channel 3 _R Reception Channel 11 Subscriber Circuit 12 Network 13 Central Control Unit 14 Main Memory 15 Three-way Call Trunk 16 Music Playback Device 17 _U Upstream Channel 17 _D Downstream Channel 111, 151 Adder Circuit 113 Internal circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Ono 3-9-18 Shin-Yokohama, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Fujitsu Comunication Systems Ltd. (72) Tetsuya Wada Kohoku-ku, Yokohama-shi, Kanagawa Shin-Yokohama 3-9-18 Fujitsu Communication Systems Co., Ltd. (72) Inventor Takayasu Mochida 3-9-18 Shin-Yokohama, Yokohama City, Kanagawa Prefecture Fujitsu Communication Systems Co., Ltd. (72) Inventor Kenji Tsutsumi 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited

Claims (2)

[Claims] 1. Voices transmitted from a subscriber (2), respectively.
And a transmission / reception channel (3_SThree_R)
A subscriber circuit (11) for accommodating the
Network (12) interconnecting the incoming circuit (11)
A digital switching system comprising: between the subscriber circuit (11) and the network (12)
The transmission voice from the subscriber (2) to the subscriber circuit
1 channel transmitted from (11) to the network (12)
Channel up channel (17_U) And multiple other subscribers
The transmission voices from (2) are respectively transmitted to the network (1
2) a plurality of downlinks transmitted from the subscriber circuit (11)
Channel (17_D) Are provided, and the network (1
2) to the plurality of downlink channels (17_D) Via
Adds transmission voices from multiple other subscribers (2) to be transmitted
And generate received voice to the accommodated subscriber (2)
An adder circuit (111) is provided, and each subscriber circuit in the network (12) is provided.
The uplink channel (17) from (11)_U), Multiple
Downstream channels (17) of other subscriber circuits (11) _D)
By making a multiple connection, the plurality of subscribers (2) can be connected to each other.
Multiple voice connection characterized by enabling conference calls over
method. 2. The music exchange device (16) for reproducing the prerecorded music and supplying it to the network (12) via an upstream channel (17 _U ).
The network (12) is connected to each of the subscriber circuits (1
Together with the uplink channel from 1) (17 _U), by multiple access uplink channel (17 _U) from the music reproduction apparatus (16), superimposing the music call between said subscriber (2) mutually Claim 1 characterized by enabling
Multiple audio connection method described.