JP2001268119A - System and method for transmitting voice band signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that the voice quality of a voice band signal under transmission is deteriorated. SOLUTION: A connection identification number concerning a self-connection is inserted into the cell of a voice band signal to be transmitted through an in-coming line X by a connection identification number inserting part 26 of a multiplexing part 33 inside a voice transmitter. It is detected by a connection identification number detecting part 30B that this connection identification number is sent from an exchange 1 through an out-going line Y to the voice transmitter again. When it is recognized based on this detection a communication path is spread over 'voice transmitter 10 → exchange 1 → voice transmitter 10', the connection identification number detecting part 30 controls a routing correcting part and a changeover switch and performs routing control inside the multiplexing part 33 so that a cell to be transmitted through the in-coming line X can be transmitted through changeover switch 23 of the line X → routing correcting part 32 →chngeover switch of out-going line Y to a cell multiplexing part 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is arranged between an exchange and a cell exchange, and transmits, for each connection, a voice band signal through an uplink from the cell exchange to the exchange and a downlink from the exchange to the cell exchange. The present invention relates to an audio band signal transmission system having an audio transmission device and an audio band signal transmission method.

[0002]

2. Description of the Related Art Conventionally, when transmitting a voice signal, a high-efficiency voice compression / encoding method has been used in order to effectively utilize the line capacity.
A scheme is adopted in which decoding processing is performed, and one channel is assigned to one line of audio compression signal by time division multiplexing.

[0003] However, such time division multiplexing occupies a channel even in a non-communication state, resulting in a waste of line. Therefore, in order to reduce the waste and to effectively use the line, the audio signal is divided into compression-encoded audio frames and the cells are transmitted.

[0004] According to such a system configuration, by not transmitting cells when there is no sound, it is possible to statistically improve the transmission efficiency by making the transmission path available to other lines during no call. Has been taken.

[0005] Further, unlike voice signals, voice band data signals such as facsimile and modem signals cannot be compression-encoded, and are therefore directly converted into cells without compression and transmitted. Each cell is composed of a header area indicating additional information such as an address and a data type, and a data area including a compression-encoded audio signal or an audio signal itself.

[0006]

However, in the above-mentioned prior art, when a large-scale network is used as shown in FIG.
The signal is transmitted to the other party through the relay station of the exchange A via the transmission line C, and the exchange A performs the circuit switching of the voice at the relay station.

Therefore, in the voice transmitting apparatus B, it is necessary to decode the voice converted into cells in the voice decoding unit 1B into the original state, and to pass the decoded voice to the exchange A. Therefore, in a communication network that performs relay transmission, these telephones D
Even when a call is made between the voice transmission devices, the voice decoding unit 1B and the voice encoding unit 2B of each voice transmission device B use the voice compression code
There has been a problem that decoding is repeated a plurality of times, which causes a deterioration in voice quality.

The present invention has been made in view of the above problems, and has as its object to provide a voice band signal transmission system that does not degrade the voice quality of a voice band signal, and a voice band signal transmission system thereof. It is to provide a method.

[0009]

In order to achieve the above object, a voice band signal transmission system according to the present invention is arranged between an exchange and a cell exchange, and for each connection, an uplink line from the cell exchange to the exchange and the An audio band signal transmission system having an audio transmission device for transmitting an audio band signal through a downlink from a switch to a cell switch,
A connection identification number that is provided for each connection and sets a connection identification number that identifies each connection, and that inserts its own connection identification number into a cell of a voice band signal transmitted to the exchange through an uplink line related to its own connection. An insertion unit, a connection identification number detection unit provided for each connection, and a connection identification number detection unit for detecting a connection identification number included in a cell of a voice band signal transmitted from the exchange via a downlink related to the own connection; By performing routing correction on a cell of a voice band signal transmitted to an exchange through an uplink related to its own connection in response to a predetermined control signal before inputting the cell to a connection identification number insertion unit corresponding to this connection, Without going through Through the downlink corresponding to own connection is one having a routing correcting unit for transmitting cells of voice band signals.

Therefore, according to the voice band signal transmission system of the present invention, the cell of the voice band signal transmitted to its own connection is changed from "voice transmission device to exchange" in response to the notification from the other connection identification number detecting unit. → Voice transmission device
Before the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is input to the connection identification number insertion unit corresponding to this connection. By making corrections, the cells of the voice band signal are transmitted through the downlink corresponding to this connection without passing through the exchange, so that the cell disassembly / assembly and the like that occur when transmitting to the exchange are performed. The processing can be eliminated, and the delay of the audio band signal and the deterioration of the audio quality can be reliably prevented.

[0011] The voice band signal transmission method of the present invention comprises:
A voice transmission device arranged between a switch and a cell switch,
A voice band signal transmission method for transmitting a voice band signal through an up line from the cell switch to the switch and a down line from the switch to the cell switch for each connection, wherein a connection identification number insertion unit provided for each connection In this, a connection identification number to be identified for each connection is set, and the own connection identification number is inserted into the cell of the voice band signal transmitted to the exchange through the uplink line related to the own connection. A connection identification number detection unit provided detects a connection identification number included in a cell of a voice band signal transmitted from the exchange through a down line related to its own connection, and further includes a routing correction unit provided for each connection. At the own connection according to the predetermined control signal. Routing cells before being input to the connection identification number insertion unit corresponding to this connection by routing correction of the cell of the voice band signal transmitted to the exchange through the uplink line related to the connection, without passing through the exchange. The cell of the voice band signal is transmitted through the down line corresponding to the connection.

Therefore, according to the voice band signal transmission method of the present invention, the cell of the voice band signal transmitted to the own connection is changed to "voice transmission device → switch" in response to the notification from the other connection identification number detecting unit. → It is determined that the communication path of the voice transmission device has been set up, and the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is inserted into the connection identification number insertion unit corresponding to this connection. By performing routing correction before input, the cells of the voice band signal are transmitted through the downlink corresponding to this own connection without passing through the exchange, so that the cells generated when transmitting to the exchange are Disassembly / assembly processing can be eliminated, and delay of voice band signals and deterioration of voice quality can be reliably prevented. It can be.

[0013]

A voice band signal transmission system according to claim 1 of the present invention is arranged between an exchange and a cell exchange, and for each connection, an up line from the cell exchange to the exchange and from the exchange to the cell exchange. An audio band signal transmission system having an audio transmission device for transmitting an audio band signal through a downlink to a connection, provided for each connection, setting a connection identification number for each connection, A connection identification number insertion unit for inserting its own connection identification number into a cell of a voice band signal transmitted to the exchange through a line, and a voice transmitted from the exchange through a down line associated with the connection and provided for each connection. Check the connection identification number included in the cell of the band signal. A connection identification number detecting unit that is provided for each connection, and inserts a connection identification number insertion unit corresponding to this connection into a cell of a voice band signal transmitted to an exchange through an uplink associated with the connection in accordance with a predetermined control signal. A routing correction unit for transmitting the cell of the voice band signal through the downlink corresponding to the own connection without passing through the exchange, by providing the routing correction before inputting to the connection, and provided for each connection. When one of the connection identification number detectors detects a connection identification number through a downlink associated with its own connection, the connection identification number detector corresponding to the connection identification number detects the connection identification number. Notify to output predetermined control signal It is characterized in.

Therefore, according to the voice band signal transmission system according to the first aspect of the present invention, the cell of the voice band signal transmitted to its own connection is set to "cell" in response to the notification from the other connection identification number detecting unit. Judgment is made on the communication path of "voice transmission device → exchange → voice transmission device", and the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is connected to the connection corresponding to this connection. By performing routing correction before inputting to the identification number insertion unit, the cell of the voice band signal is transmitted through the downlink corresponding to this own connection without passing through the exchange, so that the cell is transmitted to the exchange. In such a case, processing such as cell disassembly and assembly that occurs at the time of operation can be eliminated, and the delay of the voice band signal and the quality of the voice can be reduced. It is possible to reliably prevent reduction. The same effect can be obtained in the audio band signal transmission method according to the twenty-first aspect.

According to a second aspect of the present invention, there is provided a voice band signal transmission system according to the first aspect.
The voice transmission device includes an exchange interface unit for transmitting an audio band signal to and from an exchange, a transmission line interface unit for transmitting an audio band signal to a cell exchange, and a transmission line interface unit between the exchange interface unit and the transmission line interface unit. A multiplexing unit arranged to transmit a voice band signal between the exchange and the cell exchange.

Therefore, according to the voice band signal transmission system according to the second aspect of the present invention, the voice transmission device is constituted by three units of the switching interface unit, the transmission line interface unit, and the multiplexing unit. The same effect can be obtained also in the audio band signal transmission method according to claim 22.

According to a third aspect of the present invention, in a voice band signal transmission system,
The multiplexing unit of the audio transmission device accommodates, for each connection, a connection identification number insertion unit, a connection identification number detection unit, and a routing correction unit, and the connection identification number detection unit detects another connection identification number. When the communication unit recognizes that the communication path relating to its own connection has been established in the order of “voice transmission device → exchanger → voice transmission device” in response to the notification from the unit, the routing control unit corresponding to this connection performs predetermined control. A signal, and the routing correction unit performs routing correction on the voice band signal from the uplink in accordance with the predetermined control signal,
This voice band signal is transmitted to the downstream line without passing through the exchange interface unit and the exchange.

Therefore, according to the voice band signal transmission system according to the third aspect of the present invention, the communication path relating to its own connection is set to “voice transmission device → switch” in response to the notification from the other connection identification number detecting unit. ->"Voice transmission device", the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is input to the connection identification number insertion unit corresponding to this connection. By performing the routing correction, the cell of the voice band signal is transmitted through the downlink corresponding to this own connection without passing through the exchange interface unit and the exchange, so that the cell generated in the exchange interface unit Disassembly / assembly and processing that occurs in the exchange can be eliminated, and the voice band Delay and the items, it is possible to reliably prevent degradation of the audio quality. The same effect can be obtained in the audio band signal transmission method according to the twenty-third aspect.

According to a fourth aspect of the present invention, there is provided a voice band signal transmission system according to the third aspect of the present invention.
The switching interface unit of the voice transmission device includes a compression coding unit that compresses and codes a voice band signal transmitted from the switching unit through the downlink and a compression and decoding unit that compresses and decodes the voice band signal transmitted from the multiplexing unit through the uplink. And a decoding unit.

Therefore, according to the voice band signal transmission system according to the fourth aspect of the present invention, the communication path relating to its own connection is changed from "voice transmission device to exchange" in response to the notification from the other connection identification number detecting unit. ->"Voice transmission device", the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is input to the connection identification number insertion unit corresponding to this connection. By performing routing correction, the cell of the voice band signal is transmitted through the downlink corresponding to the own connection without passing through the exchange interface unit and the exchange, so that the cell disassembly / assembly of the exchange interface unit is performed. And eliminates audio compression encoding / decoding processing and processing that occurs in the exchange. Can, delay and voice band signals, it is possible to reliably prevent degradation of the audio quality. still,
The same effect can be obtained also in the voice band signal transmission method according to claim 24.

According to a fifth aspect of the present invention, there is provided a voice band signal transmission system according to the second aspect.
The switch interface unit of the voice transmission device accommodates, for each connection, a connection identification number insertion unit, a connection identification number detection unit, and a routing correction unit, and the connection identification number detection unit detects another connection identification number. When the communication unit recognizes that the communication path relating to its own connection has been established in the order of “voice transmission device → exchanger → voice transmission device” in response to the notification from the unit, the routing control unit corresponding to this connection performs predetermined control. A signal is output, and the routing correction unit performs routing correction on the voice band signal from the uplink according to the predetermined control signal, thereby transmitting the voice band signal to the downlink without passing through the exchange. It is characterized by doing.

Therefore, according to the voice band signal transmission system according to the fifth aspect of the present invention, the communication path relating to its own connection is changed from "voice transmission device to exchange" in response to the notification from the other connection identification number detecting unit. ->"Voice transmission device", the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is input to the connection identification number insertion unit corresponding to this connection. By performing the routing correction, the cell of the voice band signal is transmitted through the downlink corresponding to this connection without passing through the exchange, so that the delay of the voice band signal and the deterioration of the voice quality While reliably preventing
By providing this function not to the multiplexing unit, which is the control system of the system, but to the exchange interface unit, it is possible to easily disconnect from the system even when a failure occurs or during maintenance. The same effect can be obtained in the audio band signal transmission method according to claim 25.

According to a sixth aspect of the present invention, there is provided an audio band signal transmission system according to the fifth aspect of the present invention.
An exchange interface unit of the voice transmission device compresses and encodes an audio band signal transmitted from the exchange through the downlink, and transmits a compression encoding unit that transmits the compressed and encoded audio band signal to the connection identification number detection unit. And a compression decoding section for compressing and decoding the audio band signal transmitted from the connection identification number inserting section through the connection identification number inserting section.

Therefore, according to the voice band signal transmission system according to the sixth aspect of the present invention, the communication path relating to its own connection is changed from "voice transmission device to exchange" in response to the notification from the other connection identification number detecting unit. ->"Voice transmission device", the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is input to the connection identification number insertion unit corresponding to this connection. By performing the routing correction, the cell of the voice band signal is transmitted through the downlink corresponding to this connection without passing through the exchange, so that the delay of the voice band signal and the deterioration of the voice quality To the switch interface instead of the multiplexing unit, which is the control system of the system. Function By giving, can be disconnected easily from the system even when failure occurs or maintenance. The same effect can be obtained in the audio band signal transmission method according to claim 27.

According to a seventh aspect of the present invention, there is provided an audio band signal transmission system according to the second aspect.
The transmission line interface unit of the audio transmission device accommodates, for each connection, a connection identification number insertion unit, a connection identification number detection unit, and a routing correction unit, wherein the connection identification number detection unit includes another connection identification number. In response to the notification from the detection unit, when it recognizes that the communication path relating to its own connection is extended to "voice transmission device → exchanger → voice transmission device", the routing correction unit corresponding to this connection is determined by the routing correction unit. Outputs a control signal, the routing correction unit, according to the predetermined control signal, by routing correction of the voice band signal from the uplink, without passing through the multiplexing unit, the switch interface unit and the switch, This voice band signal is transmitted to the downlink.

Therefore, according to the voice band signal transmission system of the present invention, a communication path relating to its own connection is set to “voice transmission device → switch” in response to a notification from another connection identification number detecting unit. ->"Voice transmission device", the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is input to the connection identification number insertion unit corresponding to this connection. By performing routing correction, the cell of the voice band signal is transmitted through the downlink corresponding to the own connection without passing through the multiplexing unit, the switching interface unit and the switching unit. Eliminates multiplexing processing, cell disassembly / assembly of the switch interface, and processing that occurs in the switch. It can, delay and voice band signals, it is possible to reliably prevent degradation of the audio quality. The same effect can be obtained in the audio band signal transmission method according to claim 27.

[0027] The voice band signal transmission system according to claim 8 of the present invention has the following features.
The switching interface unit of the voice transmission device includes a compression coding unit that compresses and codes a voice band signal transmitted from the switching unit through the downlink and a compression and decoding unit that compresses and decodes the voice band signal transmitted from the multiplexing unit through the uplink. And a decoding unit.

Therefore, according to the voice band signal transmission system of the present invention, the communication path relating to its own connection is changed from "voice transmission device to exchange" in response to the notification from the other connection identification number detecting unit. ->"Voice transmission device", the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is input to the connection identification number insertion unit corresponding to this connection. By performing routing correction, the cell of the voice band signal is transmitted through the downlink corresponding to the own connection without passing through the multiplexing unit, the switching interface unit and the switching unit. Multiple processing, cell disassembly / assembly of the switch interface, voice compression encoding / decoding, etc. By eliminating what happens to the exchange, it is possible to cope with most of the audio band signal delay among the audio transmission device, further, it is possible to reliably prevent degradation of the audio quality. The same effect can be obtained also in the audio band signal transmission method according to claim 28.

According to the ninth aspect of the present invention, in addition to the configuration of the first aspect, the voice band signal transmission system according to the present invention further comprises:
The cell switch accommodates, for each connection, a connection identification number insertion unit, a connection identification number detection unit, and a routing correction unit, and the connection identification number detection unit receives a notification from another connection identification number detection unit. In response, when it recognizes that the communication path relating to its own connection is extended to “cell exchange → voice transmission device → exchanger → voice transmission device → cell exchange”, the routing correction unit corresponding to this connection establishes a predetermined path. The routing correction unit outputs a control signal, and in accordance with the predetermined control signal, performs a routing correction on the voice band signal from the uplink, so that the voice band signal does not pass through the voice transmission device and the exchange. Is transmitted to the downlink.

Therefore, according to the voice band signal transmission system according to the ninth aspect of the present invention, the communication path relating to its own connection is changed from "cell exchange to voice transmission" in response to the notification from the other connection identification number detecting unit. When recognizing that “device → exchanger → voice transmission device → cell switch” is established, the voice band signal from the upstream line relating to this connection is corrected by routing, so that the signal passes through the voice transmission device and the exchange. Without transmitting the audio band signal to the downstream line, the processing of the audio transmission device and the processing that occurs in the exchange are eliminated, so that the audio band signal in the audio band signal transmission system is most likely to be transmitted. The delay can be dealt with, and the deterioration of the voice quality can be reliably prevented. The same effect can be obtained in the audio band signal transmission method according to claim 29.

According to a tenth aspect of the present invention, in addition to the configuration of the ninth aspect, the audio transmission apparatus compresses and encodes the audio band signal transmitted from the exchange via the down line. A compression encoding unit;
And a compression decoding section for compressing and decoding the voice band signal transmitted from the cell exchange through the uplink.

Therefore, according to the voice band signal transmission system according to the tenth aspect of the present invention, the communication path relating to its own connection is changed from "cell exchange to voice transmission" in response to the notification from the other connection identification number detecting unit. When recognizing that “device → exchanger → voice transmission device → cell switch” is established, the voice band signal from the upstream line relating to this connection is corrected by routing, so that the signal passes through the voice transmission device and the exchange. Since the voice band signal is transmitted to the down-link without performing the above, the voice compression coding / decoding process of the voice transmission device and the process that occurs in the exchange are eliminated, thereby enabling the voice band signal transmission system Thus, the delay of the voice band signal can be dealt with most, and furthermore, the deterioration of the voice quality can be surely prevented. The same effect can be obtained in the voice band signal transmission method according to claim 30.

A voice band signal transmission system according to claim 11 of the present invention is arranged between an exchange and a cell exchange, and for each connection, an up line from the cell exchange to the exchange and a down line from the exchange to the cell exchange. A voice band signal transmission system having a voice transmission device for transmitting a voice band signal through the switch, wherein a connection identification number is provided for each connection, and a connection identification number for each connection is set, Aside from the cell of the voice band signal to be transmitted to, a connection identification number cell transmission unit for transmitting a control cell including its own connection identification number in pair with the cell of the voice band signal, provided for each connection, Transmitted from the exchange via the down line related to its own connection. A connection identification number cell detection unit for detecting a control cell paired with a cell of the voice band signal and detecting a connection identification number included in the control cell; By performing routing correction on the cells of the voice band signal transmitted to the exchange through the uplink line related to the connection before inputting the cell to the connection identification number cell transmission unit corresponding to this connection, without passing through the exchange, A routing correction unit for transmitting the cell of the voice band signal through the downlink corresponding to the own connection, and among the connection identification number cell detection units provided for each connection, one connection identification number cell detection unit , Detects connection identification number through the down line related to its own connection If that, and notifies to output the predetermined control signal to the connection identification number cell detecting portion which corresponds to this connection identification number.

Therefore, according to the voice band signal transmission system of the present invention, the cell of the voice band signal transmitted to its own connection is transmitted in response to the notification from the other connection identification number cell detecting unit. Judgment is made on the communication path of "voice transmission device → exchange → voice transmission device", and the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is
By performing routing correction before input to the connection identification number cell transmission unit corresponding to this connection, the cell of the voice band signal is transmitted through the downlink corresponding to this connection without passing through the exchange. Therefore, processing such as cell disassembly / assembly, etc., which occurs when data is transmitted to the exchange can be eliminated, and delay of a voice band signal and deterioration of the voice quality can be reliably prevented. It should be noted that the same effect can be obtained in the voice band signal transmission method according to claim 31.

According to a twelfth aspect of the present invention, in addition to the configuration of the eleventh aspect, the voice transmission apparatus further comprises an exchange interface unit for transmitting an audio band signal to and from the exchange, A transmission line interface unit for transmitting a voice band signal to and from a cell switch, and a multiplexing unit arranged between the switch interface unit and the transmission line interface unit for transmitting a voice band signal between the switch and the cell switch. It is characterized by having.

Therefore, according to the voice band signal transmission system of the twelfth aspect of the present invention, the voice transmission device is constituted by the three components of the switch interface unit, the transmission line interface unit, and the multiplexing unit. The same effect can be obtained in the audio band signal transmission method according to claim 32.

According to a thirteenth aspect of the present invention, in the audio band signal transmission system, in addition to the configuration of the twelfth aspect, the multiplexing unit of the audio transmission apparatus comprises:
A connection identification number cell transmission unit, a connection identification number cell detection unit, and a routing correction unit are accommodated, and the connection identification number cell detection unit responds to a notification from another connection identification number cell detection unit. When recognizing that the communication path relating to the connection is set up in “voice transmission device → exchanger → voice transmission device”, it outputs a predetermined control signal to a routing correction unit corresponding to this connection, and the routing correction unit In accordance with the predetermined control signal, the voice band signal from the upstream line is subjected to routing correction, whereby the voice band signal is transmitted to the downstream line without passing through the exchange interface unit and the exchange. .

Therefore, according to the voice band signal transmission system of the present invention, the communication path relating to its own connection is set to “voice transmission device → When it recognizes that it is set up between the exchange and the voice transmission device, the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is input to the connection identification number cell transmission unit corresponding to this connection. Before performing the routing correction, the cells of the voice band signal are transmitted through the downlink corresponding to the own connection without passing through the exchange interface and the exchange. Cell disassembly and assembly, and the processing that occurs in the switchboard can be eliminated. Delay and voice band signals, it is possible to reliably prevent degradation of the audio quality. The same effect can be obtained in the audio band signal transmission method according to claim 33.

According to a fourteenth aspect of the present invention, in addition to the configuration of the thirteenth aspect, the switching interface unit of the voice transmission device transmits the voice band signal transmitted from the switching device through a down line. It is characterized by comprising a compression encoding section for performing compression encoding, and a compression decoding section for compressing and decoding an audio band signal transmitted from the multiplexing section via the uplink.

Therefore, according to the voice band signal transmission system of the present invention, the communication path relating to its own connection is set to “voice transmission device → When it recognizes that it is set up between the exchange and the voice transmission device, the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is input to the connection identification number cell transmission unit corresponding to this connection. Before performing the routing correction, the cells of the voice band signal are transmitted through the downlink corresponding to the own connection without passing through the exchange interface and the exchange.・ Assembly and voice compression encoding / decoding processing, and processing that occurs in the exchange Camphor it can delay and voice band signals, it is possible to reliably prevent degradation of the audio quality. The same effect can be obtained in the voice band signal transmission method according to the thirty-fourth aspect.

According to a fifteenth aspect of the present invention, in addition to the configuration of the twelfth aspect, the switching interface unit of the voice transmission device includes a connection identification number cell transmission unit and a connection identification number cell transmission unit for each connection. The connection identification number cell detection unit and the routing correction unit are accommodated, and the connection identification number cell detection unit responds to the notification from the other connection identification number cell detection unit to set the communication path related to its own connection to “ When recognizing that the voice transmission device → exchanger → voice transmission device is set, the control unit outputs a predetermined control signal to a routing correction unit corresponding to the connection of the own device, and the routing correction unit responds to the predetermined control signal. Therefore, by performing routing correction on the voice band signal from the uplink, this signal can be transmitted without passing through the exchange. Wherein the transmitting voice band signals on the downlink.

Therefore, according to the voice band signal transmission system of the present invention, the communication path relating to its own connection is set to “voice transmission device → When it recognizes that it is set up between the exchange and the voice transmission device, the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is input to the connection identification number cell transmission unit corresponding to this connection. Before performing the routing correction, the cells of the voice band signal are transmitted through the downlink corresponding to the own connection without passing through the exchange, so that the delay of the voice band signal and the voice quality thereof are reduced. Of the multiplexing part, which is the control system of the system,
By providing this function to the exchange interface unit, it can be easily separated from the system even when a failure occurs or during maintenance. The same effect can be obtained in the audio band signal transmission method according to claim 35.

According to a sixteenth aspect of the present invention, in addition to the configuration of the fifteenth aspect, the switching interface unit of the voice transmission device transmits the voice band signal transmitted from the switching device through the down line. A compression encoding unit for compression-encoding and transmitting the compression-encoded voice band signal to a connection identification number cell detection unit, and a compression decoding of the audio band signal transmitted from the connection identification number cell transmission unit via the uplink. And a compression decoding unit.

Therefore, according to the voice band signal transmission system of the present invention, the communication path relating to its own connection is set to “voice transmission device → When it recognizes that it is set up between the exchange and the voice transmission device, the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is input to the connection identification number cell transmission unit corresponding to this connection. Before performing the routing correction, the cells of the voice band signal are transmitted through the downlink corresponding to the own connection without passing through the exchange, so that the delay of the voice band signal and the voice quality thereof are reduced. Of the switching system, instead of the multiplexing unit that is the system control system, By providing this function in the over scan portion can be separated easily from the system even when failure occurs or maintenance. It should be noted that the same effect can be obtained in the audio band signal transmission method according to claim 36 of the present invention.

According to a seventeenth aspect of the present invention, in the voice band signal transmission system according to the twelfth aspect, the transmission line interface unit of the audio transmission apparatus includes a connection identification number cell transmission unit for each connection. And a connection identification number cell detection unit, and a routing correction unit. The connection identification number cell detection unit receives a communication path related to its own connection in response to a notification from another connection identification number cell detection unit. When recognizing that "voice transmission device → exchanger → voice transmission device" is set, the control unit outputs a predetermined control signal to a routing correction unit corresponding to this connection, and the routing correction unit responds to the predetermined control signal. Accordingly, the multiplexing unit, by performing routing correction of the voice band signal from the uplink,
This voice band signal is transmitted to the downlink without passing through the exchange interface unit and the exchange.

Therefore, according to the voice band signal transmission system of the present invention, the communication path relating to its own connection is set to “voice transmission device → When it recognizes that it is set up between the exchange and the voice transmission device, the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is input to the connection identification number cell transmission unit corresponding to this connection. Before performing the routing correction, the cells of the voice band signal are transmitted through the downlink corresponding to the own connection without passing through the multiplexing unit, the switching interface unit and the switching unit. Multiplex processing, cell disassembly / assembly of the switch interface,
The processing that occurs in the exchange can be eliminated, and the delay of the voice band signal and the deterioration of the voice quality can be reliably prevented. The same effect can be obtained in the audio band signal transmission method according to claim 37.

According to the eighteenth aspect of the present invention, in the voice band signal transmission system of the present invention, in addition to the configuration of the seventeenth aspect, the exchange interface unit of the audio transmission device transmits the audio band signal transmitted from the exchange via the downlink. It is characterized by comprising a compression encoding section for performing compression encoding, and a compression decoding section for compressing and decoding an audio band signal transmitted from the multiplexing section via the uplink.

Therefore, according to the audio band signal transmission system of the present invention, the communication path relating to its own connection is set to “the audio transmission device → When it recognizes that it is set up between the exchange and the voice transmission device, the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is input to the connection identification number cell transmission unit corresponding to this connection. Before performing the routing correction, the cells of the voice band signal are transmitted through the downlink corresponding to the own connection without passing through the multiplexing unit, the switching interface unit and the switching unit. Multiplexing processing, cell disassembly / assembly and voice compression encoding / decoding of the exchange interface By eliminating what happens to the process, etc., and the exchange, it is possible to cope with most of the audio band signal delay among the audio transmission device, further, it is possible to reliably prevent degradation of the audio quality. It should be noted that the same effect can be obtained in the audio band signal transmission method according to claim 38 of the present invention.

In the voice band signal transmission system according to the nineteenth aspect of the present invention, in addition to the configuration according to the eleventh aspect, the cell exchange includes a connection identification number cell transmission unit and a connection identification number cell for each connection. The connection identification number cell detection unit accommodates a detection unit and a routing correction unit. In response to the notification from the other connection identification number cell detection unit, the communication path relating to its own connection is “cell exchange → voice transmission”. When recognizing that “device → exchanger → voice transmission device → cell exchange” is established, a predetermined control signal is output to a routing correction unit corresponding to this connection, and the routing correction unit responds to the predetermined control signal. Accordingly, by performing routing correction on the voice band signal from the uplink, the signal passes through the voice transmission device and the exchange. It not, characterized in that transmits the voice band signal to the down line.

Therefore, according to the voice band signal transmission system of the nineteenth aspect of the present invention, the communication path relating to its own connection is changed from "cell exchange to voice" in response to the notification from the other connection identification number cell detector. When recognizing that the transmission device → exchanger → speech transmission device → cell switch ”is established, routing correction is performed on the voice band signal from the uplink line related to this connection, so that the signal passes through the voice transmission device and the exchange. Without doing
Since this voice band signal is transmitted to the down line, the processing of the voice transmission device and the processing that occurs in the exchange are eliminated, so that the delay of the voice band signal in the voice band signal transmission system can be dealt with most. In addition, it is possible to reliably prevent the voice quality from deteriorating. The same effect can be obtained in the audio band signal transmission method according to claim 39.

According to a twentieth aspect of the present invention, in addition to the configuration of the nineteenth aspect, the audio transmission apparatus compresses and encodes the audio band signal transmitted from the exchange via the down line. A compression encoding unit;
And a compression decoding section for compressing and decoding the voice band signal transmitted from the cell exchange through the uplink.

Therefore, according to the voice band signal transmission system of the present invention, the communication path relating to its own connection is changed from "cell switch to voice" in response to the notification from the other connection identification number cell detection unit. When recognizing that the transmission device → exchanger → speech transmission device → cell switch ”is established, routing correction is performed on the voice band signal from the uplink line related to this connection, so that the signal passes through the voice transmission device and the exchange. Without doing
Since the audio band signal is transmitted to the downlink, the audio compression coding / decoding process of the audio transmission device,
By eliminating the processing that occurs in the exchange, the delay of the voice band signal can be dealt with most in this voice band signal transmission system, and furthermore, the deterioration of the voice quality can be reliably prevented. The same effect can be obtained in the voice band signal transmission method according to claim 40.

Hereinafter, embodiments of the voice band signal transmission system of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of an entire voice band signal transmission system according to an embodiment of the present invention.

The voice band signal transmission system shown in FIG.
An exchange 1 for performing voice exchange processing, a cell exchange 37 for performing voice cell exchange processing, and an exchange X arranged between the exchange 1 and the cell exchange 37 for each connection. And a voice transmission device 10 for transmitting a voice band signal through the downlink Y from the exchange 1 to the cell exchange 37.

The voice transmission apparatus 10 transmits an audio band signal between the exchange 1 and the cell exchange 37 by performing a cell disassembly / assembly process and transmitting the audio band signal with the exchange 1. A transmission line interface unit 35 for transmission, and a multiplexing unit disposed between the exchange interface unit 32 and the transmission line interface unit 35 for performing a cell multiplexing process on the voice band signal between the exchange 1 and the cell exchange 37 and transmitting the signal. 33.

Next, each embodiment of the voice band signal transmission system having such an overall configuration will be described.

(Embodiment 1) FIG. 2 is a block diagram showing a schematic configuration of a part of the inside of a voice transmission device in a voice band signal transmission system according to a first embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 1 and 4.

The voice transmission apparatus 10 shown in FIG. 2 comprises the exchange interface unit 32, the transmission line interface unit 35, and the multiplexing unit 33 as described above, and the exchange interface unit 32, the transmission line interface unit 35, and the multiplexing unit. The exchanges 33 are connected to the exchange 1 via the exchange bus 20, and the transmission line interface 35 is connected to the exchange 1 via the exchange bus 20.
Are connected to a cell exchange 37 via a transmission path bus 36 described later.

The exchange bus 20 receives an audio band signal from the exchange 1 and transmits it to the exchange interface unit 32. The exchange bus 20 also performs time division multiplexing on the digitized audio band signal transmitted from the exchange interface unit 32 to perform the exchange operation. 1 bus.

The multiplexing unit 33 includes, for each connection, a connection identification number insertion unit 26 (26B), a connection identification number detection unit 30 (30B), a routing correction unit 22 (22B), and two changeover switches. 23
(23B), and a cell multiplexing unit 34 for multiplexing cells in the voice transmission apparatus 10.

The connection identification number insertion unit 26
A connection identification number provided for each connection is set for each connection, and the cell of the voice band signal transmitted from the cell multiplexing unit 34 to the exchange 1 through the uplink X relating to the own connection is assigned to the own cell. A connection identification number is inserted.

The connection identification number detector 30 (3
0B) is provided for each connection, detects the connection identification number included in the cell of the voice band signal transmitted from the exchange 1 through the downlink Y relating to its own connection, and detects another connection identification number detection unit 30B. Changeover switch 2 according to the notification from (30)
3 (23B), and further transmits a predetermined control signal to its own routing correction unit 22 (22B) so as to execute the routing correction on the cell of the voice band signal obtained by this switching operation. Output.

The routing correction section 22 (22B)
The cell of the voice band signal transmitted from the cell multiplexing unit 34 to the exchange 1 through the uplink X related to the own connection in accordance with a predetermined control signal is provided for each connection.
By performing routing correction before inputting to the connection identification number insertion unit 26 (26B) corresponding to this connection, the cell of the voice band signal is transmitted through the downlink Y corresponding to the own connection without passing through the exchange 1. Is transmitted to the cell multiplexing unit 34.

Further, one of the connection identification number detectors 30 and 30B provided for each connection detects one of the connection identification numbers through the downlink Y related to its own connection. Then, it notifies the connection identification number detection unit 30 (30B) corresponding to this connection identification number to output the predetermined control signal.

The switch interface unit 32 is connected to the cell disassembly unit 24 (24B) on the uplink X for each connection.
And the audio compression / decoding unit 25 (25B) and the cell assembling unit 28 (28B) and the audio compression / encoding unit 29 in the downlink Y.
(29B).

The cell decomposing unit 24 (24B) decomposes a cell received from the cell multiplexing unit 34 through the uplink X into auxiliary information and a voice compression signal.

The audio compression / decoding section 25 (25B)
It has one or a plurality of audio compression methods, and performs compression decoding by switching the audio compression method according to the contents of the cell header.

The audio compression encoding unit 29 (29B)
It has one or a plurality of audio compression schemes and performs compression encoding of audio signals.

The cell assembling section 28 (28B) divides the compression-encoded audio signal into frames, and assembles cells by adding a header, which is auxiliary information such as a compression method.

Next, the operation of the voice transmission device in the voice band signal transmission system shown in the first embodiment will be described. FIG. 19 shows an example of a cell format when audio is compressed.

In the initial state of the voice transmission device 10 shown in FIG. 2, the changeover switches 23 arranged on the uplink X and the downlink Y are switched to the contact A side.

That is, the connection identification number inserting unit 26 arranged on the uplink X is used to insert a part of the cell transmitted from the cell multiplexing unit 34 through the uplink X into the part shown in FIG.
As shown in FIG. 9, its own connection identification number is inserted.

The cell into which the connection identification number has been inserted is transmitted to the internal bus 21 → the cell disassembling unit 24 → the voice compression / decoding unit 25 → the exchange bus 20 → the exchange 1 via the uplink X. Further, the voice data passed through the exchange 1 is transmitted through the downlink Y to the exchange bus 20 → the audio compression / encoding unit 29B → the cell assembling unit 28B → the internal bus 2
1 → transmitted to the connection identification number detection unit 30B.

At this time, the connection identification number detecting unit 30
B detects whether or not the connection identification number is included in the cell, and transmits this cell to the cell multiplexing unit 34 via the changeover switch 23B.

Then, the voice transmission device 1 is
When the connection identification numbers 0 (connection) are connected, the connection identification number detection unit 30B detects the connection identification number inserted by the connection identification number insertion unit 26, and detects a connection identification number corresponding to the connection identification number. Notify 30.

Upon receiving the notification, the connection identification number detecting unit 30 sets the communication path relating to its own connection to “the voice transmission device 10 → the exchange 1 → the voice transmission device 10” in response to the notification from the connection identification number detection unit 30 B. , A predetermined control signal is notified to the routing correction unit 22 corresponding to this connection, and the changeover switch 23 is set to the contact B side.

After setting the changeover switch 23 to the contact B side, the cell transmitted from the cell multiplexing unit 34 via the uplink X is transferred to the changeover switch 23 arranged on the uplink X → the routing correction unit 22 → the downlink Y. By passing through the route from the arranged switch 23 to the cell multiplexing unit 34, it does not pass through the internal bus 21, the exchange interface unit 32, the exchange bus 20 and the exchange 1, that is, the exchange bus 20 and the exchange 1 Of course,
Cell disassembly unit 24 inside the exchange interface unit 32
It is possible to perform transmission without performing cell disassembly / assembly processing by the cell assembling unit 28 and audio compression / decoding / encoding by the audio compression / decoding unit 25 and the audio compression / encoding unit 29.

According to the first embodiment, in response to the notification from the other connection identification number detecting unit 30B, the communication path relating to its own connection is changed to “voice transmission device 10 →
When it is recognized that the connection is established between the exchange 1 and the voice transmission device 10, the uplink X
Cell of the voice band signal transmitted to the exchange 1 through
By performing routing correction before inputting to the connection identification number insertion unit 26 corresponding to this connection, the internal bus 21, the exchange interface unit 32, the exchange 2
Since the cell of the voice band signal is transmitted through the downlink Y corresponding to this own connection without passing through the switch 0 and the switch 1, the cell disassembly / assembly processing in the switch interface 32 and the voice compression code / code are performed. Decryption processing and processing that occurs in the exchange 1 can be eliminated,
It is possible to reliably prevent the delay of the voice band signal and the deterioration of the voice quality.

(Embodiment 2) FIG. 3 is a block diagram showing a schematic configuration of a part of the inside of a voice transmission device in a voice band signal transmission system according to a second embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 1 and 3. In the present embodiment,
The same reference numerals are given to the same components as those of the voice band signal transmission system shown in the first embodiment, and the description of the configuration and operation is omitted.

The difference between the audio transmission apparatus shown in FIG. 3 and the audio transmission apparatus shown in FIG.
In addition, the switch interface unit 32a is not used as the switch interface unit 32 without the voice compression encoding unit 29.

When the audio band signal is not compressed as described above, the connection identification number inserting unit 26 (26B)
As shown in FIG. 8, a connection identification number relating to its own connection is inserted using an area where there is no problem even if audio is reproduced.

According to the second embodiment, in response to the notification from the other connection identification number detecting unit 30B, the communication path relating to its own connection is changed to “voice transmission device 10 →
When it is recognized that the connection is established between the exchange 1 and the voice transmission device 10, the uplink X
Cell of the voice band signal transmitted to the exchange 1 through
By performing routing correction before inputting to the connection identification number insertion unit 26 corresponding to this connection, it is possible to cope with this connection without passing through the internal bus 21, the exchange interface unit 32a, the exchange bus 20 and the exchange 1. Since the cells of the voice band signal are transmitted through the down line Y, the cell disassembly / assembly processing inside the switch interface 32a and the processing occurring in the switch 1 can be eliminated. Thus, it is possible to reliably prevent the deterioration of the voice quality.

(Embodiment 3) FIG. 4 is a block diagram showing a schematic configuration of a part of the inside of a voice transmission apparatus in a voice band signal transmission system according to a third embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 1 and 6. In the present embodiment,
The same reference numerals are given to the same components as those of the voice band signal transmission system shown in the first embodiment, and the description of the configuration and operation is omitted.

The difference between the voice transmission device shown in FIG. 4 and the voice transmission device shown in FIG. 2 is that the voice transmission device shown in FIG. 2 has a connection identification number insertion unit 26 (26B) and a connection identification number detection unit 30 (30B). ), The audio band signal transmission system is realized by providing the routing correction unit 22 (22B) and the changeover switch 23 (23B) in the multiplexing unit 33, but instead of the multiplexing unit 33,
The voice transmission device shown in FIG. 4 includes a connection identification number insertion unit 26 (26B), a connection identification number detection unit 3
0 (30B), the routing correction unit 22 (22B) and the changeover switch 23 (23B)
2b to realize a voice band signal transmission system.

The voice transmitting apparatus shown in FIG. 4 has a changeover switch 23 (23B) and a connection identification number inserting section 26 (26B) on the uplink X from the internal bus 21 connected to the multiplexing section 33 (not shown). Then, the connection identification number inserting unit 26 (26B) is connected to the cell decomposing unit 24 (24
B).

Further, the changeover switch 23 on the down line Y
(23B) and the connection identification number detection unit 30 (30
B), and the connection identification number detecting unit 30
(30B) is connected to the cell assembly section 28 (28B).

Next, the operation of the voice band signal transmission system according to the third embodiment will be described.

When the voice transmission devices 10 (connections) are connected to each other by the exchange 1, the connection identification number detection unit 30B
When the connection identification number inserted in step 6 is detected,
The connection identification number detection unit 30 corresponding to the connection identification number is notified.

Upon receiving the notification, the connection identification number detector 30 responds to the notification from the connection identification number detector 30B to change the communication path relating to its own connection to “voice transmission device 10 → switch 1 → voice transmission device 10”. , A predetermined control signal is notified to the routing correction unit 22 corresponding to this connection, and the changeover switch 23 is set to the contact B side.

After setting the changeover switch 23 to the contact B side, cells transmitted from the multiplexing unit 33 via the internal bus 21 via the uplink X are transferred to the changeover switch 23 arranged on the uplink X → routing correction. By passing through the path from the section 22 to the changeover switch 23 arranged on the downlink Y to the internal bus 21, the cell decomposing section 24 and the cell assembling section 28, the voice compression / decoding section 25, and the voice compression inside the exchange interface 32b. It does not pass through the encoding unit 29, the exchange bus 20, and the exchange 1, that is, the cell disassembly / assembly processing by the cell disassembly unit 24 and the cell assembling unit 28 inside the exchange interface unit 32b, and the voice compression decoding The transmission can be performed without performing the audio compression decoding / encoding by the audio compression / encoding unit 29.

According to the third embodiment, in response to the notification from the other connection identification number detecting unit 30B, the communication path relating to its own connection is changed to “voice transmission device 10 →
When it is recognized that the connection is established between the exchange 1 and the voice transmission device 10, the uplink X
Cell of the voice band signal transmitted to the exchange 1 through
By performing routing correction before inputting to the connection identification number inserting unit 26 corresponding to this connection, the cell disassembling unit 24 and the cell assembling unit 28, the voice compression / decoding unit 25, and the voice compression / encoding in the exchange interface 32b. Since the cell of the voice band signal is transmitted through the downlink Y corresponding to the own connection without passing through the switching unit 29, the switching bus 20, and the switching device 1, the cell disassembly / assembly processing in the switching interface 32b is performed. In addition, it is possible to eliminate the voice compression coding / decoding process and the process that occurs in the exchange 1, and it is possible to reliably prevent the delay of the voice band signal and the deterioration of the voice quality.

Furthermore, by providing this function to the exchange interface unit 32b instead of the multiplexing unit 33 which is the control system of the system, it is possible to easily disconnect the system from the system even when a failure occurs or during maintenance.

(Embodiment 4) FIG. 5 is a block diagram showing a schematic configuration of a part of the inside of a voice transmission device in a voice band signal transmission system according to a fourth embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 1 and 5. In this embodiment, the same components as those of the voice band signal transmission system shown in the third embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted.

The difference between the audio transmission apparatus shown in FIG. 5 and the audio transmission apparatus shown in FIG.
In addition, the switch interface unit 32c is not used as the switch interface unit 32b without the voice compression encoding unit 29.

When the audio band signal is not compressed as described above, the connection identification number inserting unit 26 (26B)
As shown in FIG. 8, a connection identification number relating to its own connection is inserted using an area where there is no problem even if audio is reproduced.

According to the fourth embodiment, in response to the notification from the other connection identification number detecting unit 30B, the communication path relating to its own connection is changed to “voice transmission device 10 →
When it is recognized that the connection is established between the exchange 1 and the voice transmission device 10, the uplink X
Cell of the voice band signal transmitted to the exchange 1 through
By performing routing correction before inputting to the connection identification number insertion unit 26 corresponding to this connection, the cell disassembly unit 24 and the cell assembling unit 28 in the exchange interface 32c, the exchange bus 20, and the exchange 1 do not pass through. Since the cell of the voice band signal is transmitted through the down line Y corresponding to the own connection, the cell disassembly / switching in the switch interface unit 32c is performed.
Assembling processing and processing that occurs in the exchange 1 can be eliminated, and delay of a voice band signal and deterioration of the voice quality can be reliably prevented.

Furthermore, by providing this function to the exchange interface unit 32c instead of the multiplexing unit 33 as the control system of the system, it is possible to easily disconnect the system from the system even when a failure occurs or during maintenance.

(Embodiment 5) FIG. 6 is a block diagram showing a schematic configuration of a part of the inside of an audio transmission apparatus in an audio band signal transmission system according to a fifth embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 1 and 8. In this embodiment, the same components as those of the audio band signal transmission system shown in the first embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted.

The difference between the voice transmission device shown in FIG. 6 and the voice transmission device shown in FIG. 2 is that the voice transmission device shown in FIG. 2 uses a connection identification number insertion unit 26 (26B) and a connection identification number detection unit 30 (30B). ), The audio band signal transmission system is realized by providing the routing correction unit 22 (22B) and the changeover switch 23 (23B) in the multiplexing unit 33, but instead of the multiplexing unit 33,
The voice transmission device shown in FIG. 6 includes a connection identification number insertion unit 26 (26B), a connection identification number detection unit 3
0 (30B), the routing correction unit 22 (22B) and the changeover switch 23 (23B)
5 to realize a voice band signal transmission system.

[0100] The voice transmission apparatus shown in FIG. 6 is provided with an uplink X from a transmission path bus 36 connected to a cell exchange 37 (not shown).
The changeover switch 23 (23B) and the connection identification number insertion unit 26 (26B) are arranged above, and the connection identification number insertion unit 26 (26B) is connected to the internal bus 21 connected to the multiplexing unit 33. .

Further, the changeover switch 23 on the downlink Y
(23B) and the connection identification number detection unit 30 (30
B), and the connection identification number detecting unit 30
Internal bus 21 for connecting (30B) to the multiplexing unit 33
Connected to.

Next, the operation of the voice band signal transmission system according to the fifth embodiment will be described.

The connection identification number inserting section 26 arranged on the upstream line X assigns its own connection identification number to a part of the cells transmitted from the transmission line bus 36 through the upstream line X as shown in FIG. insert.

The cell into which the connection identification number has been inserted as described above is transferred to the internal bus 21 → multiplexing unit 33 → internal bus 21 → cell disassembling unit 24 → voice compression / decoding unit 25 → switch bus 20 → switch via the up line X. 1 is transmitted. Further, the voice data passed through the exchange 1 is transmitted through the downlink Y to the exchange bus 20 → the audio compression / encoding unit 29B →
The data is transmitted to the cell assembling section 28B → the internal bus 21 → the multiplexing section 33 → the internal bus 21 → the connection identification number detecting section 30B.

At this time, the connection identification number detecting unit 30
B detects whether or not the connection identification number is included in the cell, and transmits the cell to the transmission path bus 36 via the changeover switch 23B.

Then, the voice transmission device 1 is
When the connection identification numbers 0 (connection) are connected, the connection identification number detection unit 30B detects the connection identification number inserted by the connection identification number insertion unit 26, and detects a connection identification number corresponding to the connection identification number. Notify 30.

Upon receiving the notification, the connection identification number detecting unit 30 sets the communication path relating to its own connection to “the voice transmission device 10 → the exchange 1 → the voice transmission device 10” in response to the notification from the connection identification number detection unit 30 B. , A predetermined control signal is notified to the routing correction unit 22 corresponding to this connection, and the changeover switch 23 is set to the contact B side.

After setting the changeover switch 23 to the contact B side, the cell transmitted from the transmission line bus 36 via the uplink X is transferred to the changeover switch 23 arranged on the uplink X → routing corrector 22 → downlink Y. The internal bus 21, the multiplexing unit 33, and the exchange interface unit 3 pass through the path of the arranged switch 23 → the cell multiplexing unit 34.
2. It does not pass through the exchange bus 20 and the exchange 1, that is, the cell multiplexing process of the multiplexing unit 33 and the cell disassembly / disassembly / cell assembling unit 28 inside the exchange interface unit 32. The transmission can be performed without performing the assembling process or the audio compression / decoding / encoding by the audio compression / decoding unit 25 and the audio compression / encoding unit 29.

According to the fifth embodiment, in response to the notification from the other connection identification number detecting unit 30B, the communication path relating to its own connection is set to “voice transmission device 10 →
When it is recognized that the connection is established between the exchange 1 and the voice transmission device 10, the uplink X
Cell of the voice band signal transmitted to the exchange 1 through
By performing routing correction before inputting to the connection identification number insertion unit 26 corresponding to this connection, the signal passes through the internal bus 21, the multiplexing unit 33, the internal bus 21, the exchange interface unit 32, the exchange bus 20, and the exchange 1. The cell of the voice band signal is transmitted through the downlink Y corresponding to this own connection, so that the cell multiplexing process of the multiplexing unit 33, the cell disassembly / assembly process of the exchange interface unit 32, and the voice By eliminating the compression encoding / decoding processing and the processing that occurs in the exchange 1, the delay of the audio band signal can be dealt with most among the audio transmission apparatuses (the first to fourth embodiments) to which the present invention is applied. In addition, it is possible to reliably prevent the voice quality from deteriorating.

(Embodiment 6) FIG. 7 is a block diagram showing a schematic configuration of a part of the inside of an audio transmission apparatus in an audio band signal transmission system according to a sixth embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 1 and 7. In this embodiment, the same components as those of the voice band signal transmission system shown in the fifth embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted.

The difference between the audio transmission apparatus shown in FIG. 7 and the audio transmission apparatus shown in FIG.
In addition, the switch interface unit 32a is not used as the switch interface unit 32 without the voice compression encoding unit 29.

When the audio band signal is not compressed as described above, the connection identification number inserting section 26 (26B)
As shown in FIG. 8, a connection identification number relating to its own connection is inserted using an area where there is no problem even if audio is reproduced.

According to the sixth embodiment, in response to the notification from the other connection identification number detecting unit 30B, the communication path relating to its own connection is changed to “voice transmission device 10 →
When it is recognized that the connection is established between the exchange 1 and the voice transmission device 10, the uplink X
Cell of the voice band signal transmitted to the exchange 1 through
By performing routing correction before inputting to the connection identification number insertion unit 26 corresponding to this connection, the signal passes through the internal bus 21, the multiplexing unit 33, the internal bus 21, the exchange interface unit 32a, the exchange bus 20, and the exchange 1. The cell of the voice band signal is transmitted through the downlink Y corresponding to the own connection, so that the cell multiplexing process of the multiplexing unit 33, the cell disassembly / assembly process of the switch interface unit 32a, and the like are performed. By eliminating the processing that occurs in the exchange 1, even in the voice transmission device (first to fourth embodiments) to which the present invention is applied,
The delay of the voice band signal can be dealt with most, and further, the deterioration of the voice quality can be surely prevented.

(Embodiment 7) FIG. 8 is a block diagram showing a schematic configuration of a part of the inside of a voice transmission device and a cell switch inside a voice band signal transmission system according to a seventh embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 1 and 10. In this embodiment, the same reference numerals are given to the same components as those of the voice band signal transmission system shown in the first embodiment,
The description of the configuration and operation is omitted.

The difference between the audio band signal transmission system shown in FIG. 8 and the audio band signal transmission system shown in FIG.
The system shown in FIG.
By providing a connection identification number insertion unit 26 (26B), a connection identification number detection unit 30 (30B), a routing correction unit 22 (22B), and a changeover switch 23 (23B) in the inside, a voice band signal transmission system is realized. On the other hand, the voice band signal transmission system shown in FIG. 6 includes the connection identification number insertion unit 26 (26B), the connection identification number detection unit 30 (30B), and the routing correction unit 2.
2 (22B) and the changeover switch 23 (23B) in the cell exchange 37 to realize a voice band signal transmission system.

The cell exchange 37 shown in FIG. 8 includes an exchange switch 38 for performing a cell exchange process, the exchange switch 38 and the changeover switch 23 (23B) and the connection identification number insertion unit 26 (26B) on the uplink X. Then, the connection identification number insertion section 26 (26B) is connected to the transmission path bus 36 in the audio transmission device 10.

Further, the changeover switch 23 on the down line Y
(23B) and the connection identification number detection unit 30 (30
B), and the connection identification number detecting unit 30
(30B) is connected to the transmission path bus 36.

Next, the cell exchange 37 and the voice transmission device 1 in the voice band signal transmission system shown in the seventh embodiment will be described.
The operation of 0 will be described.

In the initial state of the cell switch 37 shown in FIG. 8, the changeover switches 23 arranged on the up line X and the down line Y are in a state of being switched to the contact A side.

That is, the connection identification number inserting section 26 arranged on the uplink X transmits the connection identification number to a part of the cell transmitted from the exchange switch 38 through the uplink X as shown in FIG. Insert a number.

The cell into which the connection identification number has been inserted is transmitted from the transmission line bus 36, the transmission line interface unit 35, the internal bus 21, and the multiplexing unit 33 through the uplink X.
→ Internal bus 21 → Cell decomposition unit 24 → Speech compression / decoding unit 2
5 → switchboard bus 20 → switch1. further,
The voice data passing through the exchange 1 is transmitted via the exchange Y through the exchange bus 20 → the audio compression / encoding unit 29B → the cell assembling unit 28B → the internal bus 21 → the multiplexing unit 33 → the internal bus 2
1 → the transmission line interface unit 35 → the transmission line bus 36 → the connection identification number detection unit 30B.

At this time, the connection identification number detecting unit 30
B detects whether or not the connection identification number is included in the cell, and transmits the cell to the cell exchange switch 38 via the changeover switch 23B.

Then, the voice transmission device 1 is
When the connection identification numbers 0 (connection) are connected, the connection identification number detection unit 30B detects the connection identification number inserted by the connection identification number insertion unit 26, and detects a connection identification number corresponding to the connection identification number. Notify 30.

Upon receiving the notification, the connection identification number detector 30 responds to the notification from the connection identification number detector 30B to change the communication path relating to its own connection to “the cell switch 37 → the voice transmission device 10 → the switch 1 → When recognizing that the connection is established between the voice transmission device 10 and the cell exchange 37, the control unit 22 notifies the routing correction unit 22 corresponding to this connection of a predetermined control signal and sets the changeover switch 23 to the contact B side.

After setting the changeover switch 23 to the contact B side, the cell transmitted from the exchange switch 38 via the uplink X is changed to the changeover switch 23 arranged on the uplink X →
The transmission path bus 36, the transmission path interface unit 35, the internal bus 21, the multiplexing unit 33, and the internal bus 21 are routed through the route of the routing correction unit 22 → the changeover switch 23 arranged on the downlink Y → the exchange switch 38. , The exchange interface unit 32, the exchange bus 20 and the exchange 1 do not pass through, that is, the exchange bus 21 and the exchange 1 as well as the transmission line interface unit 35.
, A cell multiplexing process of the multiplexing unit 33, a cell disassembling / assembling process by the cell disassembling unit 24 and the cell assembling unit 28 in the switch interface unit 32, and the voice compression / decoding unit 25 and the voice compression code. It is possible to transmit without performing the audio compression / decoding / encoding by the conversion unit 29.

According to the seventh embodiment, in response to the notification from the other connection identification number detecting unit 30B, the communication path relating to its own connection is changed to “cell exchange 37 → voice transmission device 10 → exchange 1 → voice”. When recognizing that the transmission is established between the transmission device 10 and the cell exchange 37, the audio band signal from the uplink X related to the own connection is subjected to routing correction, so that the signal passes through the audio transmission device 10 and the exchange 1. Without transmitting the audio band signal to the downlink Y, the audio transmission apparatus 10 performs cell transmission processing, cell multiplexing processing, cell disassembly / assembly processing, audio compression encoding / decoding processing, and the like. By eliminating the processing that occurs in the exchange 1, the delay of the voice band signal can be dealt with most in the voice band signal transmission system to which the present invention is applied. Further, it is possible to reliably prevent degradation of the audio quality.

(Eighth Embodiment) FIG. 9 is a block diagram showing a schematic configuration of a part of the inside of a voice transmission apparatus in a voice band signal transmission system according to an eighth embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 1 and 9. In this embodiment, the same components as those of the audio band signal transmission system shown in the eighth embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted.

The difference between the audio band signal transmission system shown in FIG. 9 and the audio band signal transmission system shown in FIG.
The exchange interface unit 32a does not have the audio compression decoding unit 25 and the audio compression encoding unit 29, but an exchange interface unit 32a is used instead.

When the audio band signal is not compressed as described above, the connection identification number inserting section 26 (26B)
As shown in FIG. 8, a connection identification number relating to its own connection is inserted using an area where there is no problem even if audio is reproduced.

According to the eighth embodiment, in response to the notification from the other connection identification number detecting unit 30B, the communication path relating to its own connection is changed to “cell exchange 37 → voice transmission device 10 → exchange 1 → voice”. When recognizing that the transmission is established between the transmission device 10 and the cell exchange 37, the audio band signal from the uplink X related to the own connection is subjected to routing correction, so that the signal passes through the audio transmission device 10 and the exchange 1. Since the voice band signal is transmitted to the downlink Y without the need, the cell transmission process, the cell multiplexing process, the cell disassembly / assembly process of the voice transmission device 10 and the processes generated in the exchange 1 are eliminated. By that
Among voice band signal transmission systems to which the present invention is applied,
The delay of the voice band signal can be dealt with most, and further, the deterioration of the voice quality can be surely prevented.

(Embodiment 9) FIG. 10 is a block diagram showing a schematic configuration of a part of the inside of an audio transmission apparatus in an audio band signal transmission system according to a ninth embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 11 and 14. In this embodiment, the same components as those of the audio band signal transmission system shown in the first embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted.

The difference between the voice band signal transmission system shown in FIG. 10 and the voice band signal transmission system shown in FIG. 2 is that the connection identification number insertion unit 26 (26B) is connected to an OAM / RM cell serving as a connection identification number cell transmission unit. A multiplexing unit 33a is provided in which the insertion unit 39 is substituted and the connection identification number detection unit 30 is replaced with an OAM / RM cell detection unit 40 which is a connection identification number cell detection unit.

The OAM / RM cell insertion unit 39 (39
B) is provided for each connection and includes its own connection identification number in pairs with the cells of the voice band signal, separately from the cells of the voice band signal transmitted to the exchange 1 through the uplink X relating to its own connection. It transmits the control cell.

The OAM / RM cell detector 40 (40
B) is provided for each connection, detects a control cell paired with a cell of a voice band signal transmitted from the exchange 1 through the downlink Y relating to the own connection, and detects a connection identification included in the control cell. Number, and another OAM / RM cell detector 40B (40).
Performs a switching operation of the changeover switch 23 (23B) in response to the notification from the controller, and furthermore, transmits a predetermined control signal to the cell of the audio band signal obtained by the switching operation to execute the routing correction. Routing correction unit 22
(22B).

The routing correction unit 22 (22B)
The cell of the voice band signal transmitted from the cell multiplexing unit 34 to the exchange 1 through the uplink X related to the own connection in accordance with a predetermined control signal is provided for each connection.
OAM / RM cell insertion unit 3 corresponding to this connection
The cell of the voice band signal is transmitted through the downlink Y corresponding to its own connection without passing through the exchange 1, by performing the routing correction before inputting to the 9 (39B).

Also, the O provided for each connection
One OAM of the AM / RM cell detector 40 (40B)
When the / RM cell detection unit 40B (40) detects the connection identification number included in the control cell through the downlink Y relating to its own connection, the OAM / RM cell detection unit 40 (40B) corresponding to this connection identification number
To output the predetermined control signal.

Next, the operation of the voice band signal transmission system according to the ninth embodiment will be described. FIG. 20 shows an RM cell format of a control cell.

As in the first embodiment, in the initial state of the voice transmission apparatus 10 shown in FIG. 10, the changeover switches 23 arranged on the uplink X and the downlink Y are switched to the contact A side. is there.

That is, the OAM allocated on the uplink X
The / RM cell insertion unit 39, apart from the cell transmitted from the cell multiplexing unit 34 through the uplink X, pairs its own connection identification number with this cell as shown in FIG. It is stored in the reserve area R.

The control cell into which the connection identification number is inserted as described above is transferred to the internal bus 21 →
Cell disassembly unit 24 → voice compression decoding unit 25 → exchange bus 2
0 → transmitted to the exchange 1. Further, the voice data transmitted through the exchange 1 is transmitted to the exchange bus 2 through the downlink Y.
0 → speech compression encoder 29B → cell assembler 28B → internal bus 21 → OAM / RM cell detector 40B.

At this time, the OAM / RM cell detector 40B
Detects whether or not the connection identification number is included in the control cell, and through the changeover switch 23B,
This cell is transmitted to the cell multiplexer 34.

Then, the voice transmission device 1 is
OAM / RM when 0 (connection) is connected
The cell detection unit 40B includes the OAM / RM cell insertion unit 39.
When the inserted connection identification number is detected, the OAM / RM cell detection unit 40 corresponding to this connection identification number is notified.

In response to the notification from the OAM / RM cell detection unit 40B, the OAM / RM cell detection unit 40 that has received this notification sets the communication path relating to its own connection to “voice transmission device 10 → switch 1 → voice transmission”. When recognizing that the connection is established on the “device 10”, a predetermined control signal is notified to the routing correction unit 22 corresponding to the own connection, and the changeover switch 23 is set to the contact B side.

After setting the changeover switch 23 to the contact B side, the cell transmitted from the cell multiplexing unit 34 via the uplink X is transferred to the changeover switch 23 arranged on the uplink X → the routing correction unit 22 → the downlink Y. By passing through the route of the arranged switch 23 → the cell multiplexing unit 34, it does not pass through the internal bus 21, the exchange interface unit 32, the exchange bus 20 and the exchange 1, that is, the inside of the exchange interface unit 32 It is possible to transmit without performing the cell disassembly / assembly processing by the cell disassembly unit 24 and the cell assembling unit 28 and the audio compression decoding / encoding by the audio compression / decoding unit 25 and the audio compression / encoding unit 29. .

According to the ninth embodiment, another OAM /
In response to the notification from the RM cell detection unit 40B (40), the communication path relating to its own connection is set to “the voice transmission device 1”.
0 → switch 1 → voice transmission device 10 ”, the cell of the voice band signal transmitted to the switch 1 through the uplink X relating to this connection is exchanged with the OAM / By performing routing correction before inputting to the RM cell insertion unit 39 (39B), the internal bus 21, the exchange interface unit 3
2. Since the cells of the voice band signal are transmitted through the downlink Y corresponding to the own connection without passing through the exchange bus 20 and the exchange 21, the cell disassembly / assembly of the exchange interface unit 32 and the audio compression are performed. The encoding / decoding process and the process that occurs in the exchange 1 can be eliminated, and the delay of the voice band signal and the deterioration of the voice quality can be reliably prevented.

(Embodiment 10) FIG. 11 is a block diagram showing a schematic configuration of a part of the inside of a voice transmission apparatus in a voice band signal transmission system according to a tenth embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 11 and 13. In this embodiment, the same components as those of the audio band signal transmission system shown in the tenth embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted.

The difference between the voice transmission apparatus shown in FIG. 11 and the voice transmission apparatus shown in FIG. 10 is that the voice transmission / decoding section 25 and the voice compression / encoding section 29 do not have the voice exchange interface 32. Is a substitute for

According to the tenth embodiment, another OAM
/ RM cell detection unit 40B (40),
Upon recognizing that the communication path relating to the own connection is set up in "the voice transmission device 10 → the switching device 1 → the voice transmission device 10", the voice band transmitted to the switching device 1 through the uplink X relating to the connection. Before the cell of the signal is subjected to the routing correction before being input to the OAM / RM cell insertion unit 39 (39B) corresponding to this connection, the internal bus 21, the exchange interface unit 3
2a, the cell of the voice band signal is transmitted via the downlink Y corresponding to this connection without passing through the exchange bus 20 and the exchange 1, so that the cell disassembly / assembly processing inside the exchange interface 32a is performed. Also, the processing that occurs in the exchange 1 can be eliminated,
It is possible to reliably prevent the delay of the voice band signal and the deterioration of the voice quality.

(Embodiment 11) FIG. 12 is a block diagram showing a schematic configuration of a part of the inside of a voice transmission apparatus in a voice band signal transmission system according to an eleventh embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 11 and 16. In this embodiment, the same components as those of the audio band signal transmission system shown in the ninth embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted.

The difference between the audio transmission apparatus shown in FIG. 12 and the audio transmission apparatus shown in FIG. 10 is that the audio transmission apparatus shown in FIG. 10 is different from the OAM / RM cell insertion unit 39 (39B), OA
By providing the M / RM cell detection unit 40 (40B), the routing correction unit 22 (22B), and the changeover switch 23 (23B) in the multiplexing unit 33a, a voice band signal transmission system is realized. Instead of the part 33a,
The voice transmission device shown in FIG. 12 includes the OAM / RM cell insertion unit 39 (39B), the OAM / RM cell detection unit 40 (4
0B), a voice band signal transmission system is realized by providing the routing correction unit 22 (22B) and the changeover switch 23 (23B) in the exchange interface unit 32d.

The switch interface unit 32d of the voice transmission apparatus shown in FIG. 12 is provided with a changeover switch 23 on the uplink X from the internal bus 21 connected to the multiplexing unit 33 (not shown).
(23B), OAM / RM cell insertion unit 39 (39B),
The cell decomposing unit 24 (24B) and the audio compression / decoding unit 25 (2
5B) and the multiplexer 41 (41B).

The cell decomposing unit 24 (24B) decomposes the cells of the audio band signal and the control cells, transmits the cells of the audio band signal to the audio compression / decoding unit 25 (25B), and converts the control cells. The signal is transmitted to one input of the multiplexer 41 (41B).

The multiplexer 41 (41B) multiplexes the cells subjected to voice compression in the voice compression / decoding section 25 (25B) and control cells and transmits the multiplexed cells to the exchange bus 20.

The exchange interface unit 32d is
On the down line Y, the changeover switch 23 (23B), OAM /
The RM cell detector 40 (40B) and the cell assembler 28 (28
B), the audio compression encoding unit 29 (29B) and the demultiplexer 42 (42B) are arranged.

The demultiplexer 42 separates the cells transmitted through the exchange bus 20 and the control cells, and converts the cells of the voice band signal into the voice compression / encoding unit 29 (29).
B) and transmits the control cell to the cell assembling section 28B.
Is to be transmitted.

In the cell assembling section 28 (28B),
The cell compression-coded by the voice compression coding section 29 (29B) and the control cell are multiplexed and transmitted to the OAM / RM cell detection section 40 (40B).

Next, the operation of the voice band signal transmission system according to the eleventh embodiment will be described.

When the voice transmission apparatuses 10 (connections) are connected to each other by the exchange 1, the OAM / RM cell detection unit 40B detects the connection identification number inserted by the OAM / RM cell insertion unit 39, and OAM / RM cell detector 4 corresponding to the connection identification number
Notify 0.

The OAM / RM cell detector 40 receiving this notification changes the communication path relating to its own connection to “the voice transmission device 10 → the exchange 1 →” in response to the notification from the other OAM / RM cell detector 40 B. When recognizing that the voice transmission device 10 "is set, the control unit 22 notifies the routing correction unit 22 corresponding to this connection of a predetermined control signal, and sets the changeover switch 23 to the contact B side.

After setting the changeover switch 23 to the contact B side, the cell transmitted from the multiplexing unit 33 via the internal bus 21 via the uplink X is changed to the changeover switch 23 arranged on the uplink X → routing correction. By passing through the path from the section 22 to the changeover switch 23 arranged on the downlink Y to the internal bus 21, the cell disassembling section 24 and the cell assembling section 28, the voice compression / decoding section 25, and the voice compression inside the exchange interface 32d. Encoding unit 29, multiplexer 41
Without passing through the demultiplexer 42, the exchange bus 20 and the exchange 1, that is, the cell disassembly section 24 and the cell assembly section 2 inside the exchange interface section 32d.
8 can be transmitted without performing the cell disassembly / assembly processing and the audio compression / decoding / encoding by the audio compression / decoding unit 25, the audio compression / encoding unit 29, the multiplexer 41, and the demultiplexer 42.

According to the eleventh embodiment, another OAM
In response to the notification from the / RM cell detection unit 40B, when it recognizes that a communication path relating to its own connection is set up in "the voice transmission device 10 → the exchange 1 → the voice transmission device 10," The cell of the voice band signal transmitted to the exchange 1 through the associated uplink X is inserted into the OAM / RM cell insertion unit 39 corresponding to this connection.
Before input to the switch interface unit 32d, the cell decomposing unit 24 and the cell assembling unit 28, the audio compression / decoding unit 25 and the audio compression / encoding unit 29, the multiplexer 41 and the demultiplexer 4 in the switch interface 32d.
2. Without going through the exchange bus 20 and the exchange 1,
Since the cells of the voice band signal are transmitted through the downlink Y corresponding to the own connection, the cell disassembly / assembly and voice compression coding / decoding processing in the switch interface unit 32d and the processing generated in the switch 1 are performed. Can be eliminated, and the delay of the voice band signal and the deterioration of the voice quality can be reliably prevented.

Furthermore, by providing this function to the exchange interface unit 32d instead of the multiplexing unit 33 which is the control system of the system, it is possible to easily disconnect the system from the system even when a failure occurs or during maintenance.

(Embodiment 12) FIG. 13 is a block diagram showing a schematic configuration of a part of the inside of a voice transmission apparatus in a voice band signal transmission system according to a twelfth embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 11 and 15. In this embodiment, the same components as those of the audio band signal transmission system shown in the eleventh embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted.

The difference between the voice transmission apparatus shown in FIG. 13 and the voice transmission apparatus shown in FIG. 12 is that the voice compression / decoding section 25, the voice compression / encoding section 29, the multiplexer 41 and the exchange interface without the demultiplexer 42 are provided. The point is that the exchange interface unit 32e is substituted for the unit 32d.

According to the twelfth embodiment, another OAM
In response to the notification from the / RM detection unit 40B, when it recognizes that the communication path relating to its own connection has been established from "voice transmission device 10 → switch 1 → voice transmission device 10", the communication path relating to its own connection is established. The cell of the voice band signal transmitted to the exchange 1 through the uplink X is subjected to routing correction before being input to the OAM / RM cell insertion unit 39 corresponding to this connection, so that the cell disassembly unit in the exchange interface unit 32e is provided. 24 and the cell assembling unit 28, the exchange bus 20, and the exchange 1, the cell of the voice band signal is transmitted through the downlink Y corresponding to the own connection. Disassembly / assembly processing and processing that occurs in the exchange 1 can be eliminated. Degradation of the audio quality can be reliably prevented.

Furthermore, by providing this function not to the multiplexing unit 33 as the control system of the system but to the exchange interface unit 32e, it is possible to easily disconnect the system from the system even when a failure occurs or during maintenance.

(Embodiment 13) FIG. 14 is a block diagram showing a schematic configuration of a part of the inside of an audio transmission apparatus in an audio band signal transmission system according to a thirteenth embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 11 and 18. In this embodiment, the same components as those of the audio band signal transmission system shown in the ninth embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted.

The difference between the audio transmission apparatus shown in FIG. 14 and the audio transmission apparatus shown in FIG. 10 is that the audio transmission apparatus shown in FIG. 10 is different from the OAM / RM cell insertion section 39 (39B), OA
By providing the M / RM cell detection unit 40 (40B), the routing correction unit 22 (22B), and the changeover switch 23 (23B) in the multiplexing unit 33a, a voice band signal transmission system is realized. Instead of the part 33a,
The voice transmission device shown in FIG. 14 includes the OAM / RM cell insertion unit 39 (39B), the OAM / RM cell detection unit 40 (4
0B), the audio band signal transmission system is realized by providing the routing correction unit 22 (22B) and the changeover switch 23 (23B) in the transmission line interface unit 35a.

In the voice transmission apparatus shown in FIG. 14, the changeover switch 23 (23B) and the OAM / RM cell insertion section 39 (39B) are connected on the uplink X from the transmission line bus 36 connected to the cell exchange 37 (not shown). Place this OAM / RM
The cell insertion unit 39 (39B) is connected to the internal bus 21 connected to the multiplexing unit 33.

Further, the changeover switch 23 on the downlink Y
(23B) and OAM / RM cell detector 40 (40B)
And the OAM / RM cell detector 40 (40
B) is connected to the internal bus 21 connected to the multiplexing unit 33.

Next, the operation of the voice band signal transmission system according to the thirteenth embodiment will be described.

The OAM / RM cell insertion unit 39 arranged on the uplink X is different from the cell transmitted from the cell multiplexing unit 34 through the uplink X and pairs its own connection identification number with this cell. 20 are stored in the reserve area R of the control cell.

The cell into which the connection identification number has been inserted as described above is transferred to the internal bus 21 → multiplexing unit 33 → internal bus 21 → cell disassembling unit 24 → voice compression / decoding unit 25 → switch bus 20 → switch via the up line X. 1 is transmitted. Further, the voice data passed through the exchange 1 is transmitted through the downlink Y to the exchange bus 20 → the audio compression / encoding unit 29B →
The data is transmitted to the cell assembling unit 28B → the internal bus 21 → the multiplexing unit 33 → the internal bus 21 → the OAM / RM cell detecting unit 40B.

At this time, the OAM / RM cell detector 40B
Detects whether a control cell including a connection identification number is included in the cell, and transmits this cell to the transmission line bus 36 via the changeover switch 23B.

Then, the voice transmission device 1 is
OAM / RM when 0 (connection) is connected
The cell detection unit 40B includes the OAM / RM cell insertion unit 39.
When the inserted connection identification number is detected, the OAM / RM cell detection unit 40 corresponding to this connection identification number is notified.

In response to the notification from the OAM / RM cell detection unit 40B, the OAM / RM cell detection unit 40 receiving this notification sets the communication path relating to its own connection to “voice transmission device 10 → switch 1 → voice transmission”. When recognizing that the connection is established on the “device 10”, a predetermined control signal is notified to the routing correction unit 22 corresponding to the own connection, and the changeover switch 23 is set to the contact B side.

After setting the changeover switch 23 to the contact B side, the cells transmitted from the transmission line bus 36 via the uplink X are transferred to the changeover switch 23 arranged on the uplink X → routing corrector 22 → downlink Y. By passing through the route from the arranged switch 23 to the transmission path bus 36, the signal does not pass through the internal bus 21, the multiplexing unit 33, the internal bus 21, the exchange interface unit 32, the exchange bus 20, and the exchange 1, That is, the cell multiplexing process of the multiplexing unit 33, the cell disassembly / assembly process by the cell disassembly unit 24 and the cell assembling unit 28 inside the switching interface unit 32, the speech compression / decoding unit 25 and the speech compression code It is possible to transmit without performing the audio compression / decoding / encoding by the conversion unit 29.

According to the thirteenth embodiment, another OAM
In response to the notification from the / RM cell detection unit 40B, when it recognizes that a communication path relating to its own connection is set up in "the voice transmission device 10 → the exchange 1 → the voice transmission device 10," The cell of the voice band signal transmitted to the exchange 1 through the associated uplink X is inserted into the OAM / RM cell insertion unit 39 corresponding to this connection.
Routing input before inputting the data to the internal bus 21, the multiplexing unit 33, the internal bus 21, the exchange interface unit 32, the exchange bus 20, and the exchange 1 corresponding to the own connection without passing through the exchange 1. Since the cell of the voice band signal is transmitted through the line Y, the cell multiplexing process of the multiplexing unit 33, the cell disassembly / assembly and the voice compression coding / decoding process of the switch interface unit 32, and the like occur in the switch 1. By eliminating the process of doing
Compared with the ninth to twelfth embodiments described above for realizing the present invention in the audio transmission device, the delay of the audio band signal can be dealt with the most, and the deterioration of the audio quality can be further reduced. It can be reliably prevented.

(Embodiment 14) FIG. 15 is a block diagram showing a schematic configuration of a part of the inside of a voice transmission apparatus in a voice band signal transmission system according to a fourteenth embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 11 and 17. In the present embodiment, the same components as those of the audio band signal transmission system shown in the thirteenth embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted.

The difference between the voice transmission apparatus shown in FIG. 15 and the voice transmission apparatus shown in FIG. 14 is that an exchange interface section 32 which does not have the audio compression / decoding section 25 and the audio compression / encoding section 29 has an exchange interface section. 32a
Is a substitute for

According to the fourteenth embodiment, another OAM
In response to the notification from the / RM cell detection unit 39B, when it recognizes that a communication path relating to its own connection has been established in “the voice transmission device 10 → the exchange 1 → the voice transmission device 10”, the connection to this own connection is established. The cell of the voice band signal transmitted to the exchange 1 through the associated uplink X is inserted into the OAM / RM cell insertion unit 39 corresponding to this connection.
The routing correction before inputting to the internal bus 21, the multiplexing unit 33, the internal bus 21, the exchange interface unit 32a, the exchange bus 20, and the exchange 1 Since the cell of the voice band signal is transmitted through the line Y, the cell multiplexing processing of the multiplexing unit 33, the cell disassembly / assembly processing of the switching interface unit 32a, and the switching equipment 1
By eliminating the processing that occurs in the above, it is possible to deal with the delay of the audio band signal most, as compared with the ninth to twelfth embodiments described above, which attempted to implement the present invention in the audio transmission device. Furthermore, it is possible to reliably prevent the deterioration of the voice quality.

(Embodiment 15) FIG. 16 is a block diagram showing a schematic configuration of a part of the inside of a voice transmission device and a cell switch inside a voice band signal transmission system according to a fifteenth embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 11 and 20. In this embodiment, the same components as those of the audio band signal transmission system shown in the ninth embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted.

The difference between the audio band signal transmission system shown in FIG. 16 and the audio band signal transmission system shown in FIG. 10 is that the system shown in FIG.
3, OAM / RM cell insertion unit 39 (39B), OAM
/ RM cell detector 40 (40B), routing corrector 2
2 (22B) and the changeover switch 23 (23B) to implement a voice band signal transmission system,
The audio band signal transmission system shown in FIG.
By providing the / RM cell insertion unit 39 (39B), the OAM / RM cell detection unit 40 (40B), the routing correction unit 22 (22B), and the changeover switch 23 (23B) in the cell switch 37a, the voice band signal transmission system is realized. It is a point that has been realized.

The cell exchange 37a shown in FIG. 16 includes an exchange switch 38 for performing a cell exchange process and this exchange switch 3
8 and the changeover switch 23 (23B) and O
An AM / RM cell insertion unit 39 (39B) is arranged, and the OAM / RM cell insertion unit 39 (39B) is connected to the transmission line bus 36 in the voice transmission device.

Further, the changeover switch 23 on the downlink Y
(23B) and OAM / RM cell detector 40 (40B)
And the OAM / RM cell detector 40 (40
B) is connected to the transmission path bus 36.

Next, the operation of the cell exchange 37a and the voice transmission device 10 in the voice band signal transmission system shown in the fifteenth embodiment will be described.

In the initial state of the cell switch 37a shown in FIG. 16, the changeover switches 23 arranged on the up line X and the down line Y are switched to the contact A side.

The OAM / RM cell insertion unit 39 arranged on the uplink X, apart from the cell transmitted from the exchange switch 38 via the uplink X, pairs its own connection identification number with this cell, As shown in FIG. 20, the data is stored in the reserve area R of the control cell.

The cell into which the connection identification number has been inserted is transmitted from the transmission line bus 36 to the transmission line interface unit 35 to the internal bus 21 to the multiplexing unit 33 via the uplink X.
→ Internal bus 21 → Cell decomposition unit 24 → Speech compression / decoding unit 2
5 → switchboard bus 20 → switch1. further,
The voice data passing through the exchange 1 is transmitted via the exchange Y through the exchange bus 20 → the audio compression / encoding unit 29B → the cell assembling unit 28B → the internal bus 21 → the multiplexing unit 33 → the internal bus 2
1 → Transmission path interface unit 35 → Transmission path bus 36 → O
This is transmitted to the AM / RM cell detection unit 40B.

At this time, the OAM / RM cell detector 40B
Detects whether or not the control cell including the connection identification number is included in the cell, and detects the changeover switch 23B
The cell is transmitted to the cell exchange switch 38 via the.

Then, the voice transmission device 1 is
OAM / RM when 0 (connection) is connected
The cell detection unit 40B includes the OAM / RM cell insertion unit 39.
When the inserted connection identification number is detected, the OAM / RM cell detection unit 40 corresponding to this connection identification number is notified.

Upon receiving the notification, the OAM / RM cell detecting unit 40 responds to the notification from the OAM / RM cell detecting unit 40B to change the communication path relating to its own connection to “the cell switch 37a → the voice transmission device 10 → the switch. 1 → voice transmission device 10 → cell exchange 37a ”, it recognizes a predetermined control signal to the routing correction unit 22 corresponding to its own connection,
Is set to the contact B side.

After setting the changeover switch 23 to the contact B side, the cells transmitted from the exchange switch 38 via the uplink X are transferred to the changeover switch 23 arranged on the uplink X →
The transmission path bus 36, the transmission path interface unit 35, the internal bus 21, the multiplexing unit 33, and the internal bus 21 are routed through the route of the routing correction unit 22 → the changeover switch 23 arranged on the downlink Y → the exchange switch 38. , The exchange interface unit 32, the exchange bus 20, and the exchange 1 do not pass through the transmission line interface unit 3.
5, the cell multiplexing process of the multiplexing unit 33, the cell disassembly / assembly process by the cell disassembly unit 24 and the cell assembling unit 28 inside the switching interface unit 32, the voice compression / decoding unit 25 and the voice compression The transmission can be performed without performing the audio compression / decoding / encoding by the encoding unit 29.

According to the fifteenth embodiment, another OAM
In response to the notification from the / RM cell detection unit 40B, it is assumed that the communication path relating to its own connection is extended to “the cell exchange 37a → the voice transmission apparatus 10 → the exchange 1 → the audio transmission apparatus 10 → the cell exchange 37a”. When the voice transmission device 10 recognizes this, it performs routing correction on the voice band signal from the uplink X related to its own connection.
Since the audio band signal is transmitted to the downlink Y without passing through the exchange 1, the cell transmission processing, cell multiplexing processing, cell disassembly / assembly processing, audio compression code / By eliminating the decoding processing and the processing that occurs in the exchange 1, the delay of the voice band signal can be dealt with most in this voice band signal transmission system, and furthermore, the deterioration of the voice quality is surely prevented. can do.

(Embodiment 16) FIG. 17 is a block diagram showing a schematic configuration of a part of the inside of a voice transmission apparatus in a voice band signal transmission system according to a sixteenth embodiment. This embodiment corresponds to a voice band signal transmission system according to claims 11 and 19. In this embodiment, the same components as those of the audio band signal transmission system shown in the sixteenth embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted.

The audio band signal transmission system shown in FIG. 17 is different from the audio band signal transmission system shown in FIG.
9 in that the exchange interface section 32a is not used as the exchange interface section 32.

According to the sixteenth embodiment, another OAM
In response to the notification from the / RM cell detection unit 40B, it is assumed that the communication path relating to its own connection is extended to “the cell exchange 37a → the voice transmission apparatus 10 → the exchange 1 → the audio transmission apparatus 10 → the cell exchange 37a”. When the voice transmission device 10 recognizes this, it performs routing correction on the voice band signal from the uplink X related to its own connection.
Since the voice band signal is transmitted to the downlink Y without passing through the exchange 1, the cell transmission processing, the cell multiplexing processing, the cell disassembly / assembly processing of the audio transmission apparatus 10, and the exchange 1 By eliminating the processing that occurs in the audio band signal transmission system, it is possible to deal with the delay of the audio band signal most in the audio band signal transmission system, and furthermore, it is possible to reliably prevent the deterioration of the audio quality.

[0198]

According to the voice band signal transmission system according to the first aspect of the present invention configured as described above, the signal is transmitted to its own connection in response to a notification from another connection identification number detecting unit. It is determined that the cell of the voice band signal is set on the communication path of “voice transmission device → exchanger → voice transmission device”, and the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is determined. By performing the routing correction, the cell of the voice band signal is transmitted through the down line corresponding to the own connection without passing through the exchange, so that the cell disassembly / assembly and the like which occur when transmitting to the exchange are performed. , The delay of the voice band signal and the deterioration of the voice quality can be reliably prevented. The same effect can be obtained in the audio band signal transmission method according to the twenty-first aspect.

According to the voice band signal transmission system according to the second aspect of the present invention, the voice transmission device is composed of a switch interface unit, a transmission line interface unit, and a multiplexing unit.
It consisted of one. The same effect can be obtained also in the audio band signal transmission method according to claim 22.

According to the voice band signal transmission system according to the third aspect of the present invention, the communication path relating to its own connection is set to “voice transmission device → switch → voice” in response to the notification from the other connection identification number detecting unit. Recognizing that it is installed on the `` transmission device '', by performing routing correction on the cells of the voice band signal transmitted to the exchange through the uplink associated with this connection, without passing through the exchange interface unit and the exchange Since the cells of the voice band signal are transmitted through the down line corresponding to the own connection, the cell disassembly / assembly occurring in the switch interface and the processing occurring in the switch can be eliminated. It is possible to reliably prevent signal delay and deterioration of voice quality. The same effect can be obtained in the audio band signal transmission method according to the twenty-third aspect.

According to the voice band signal transmission system of the fourth aspect of the present invention, in addition to the effect of the third aspect, it is possible to eliminate the voice compression coding / decoding process of the exchange interface unit, and It is possible to reliably prevent signal delay and deterioration of voice quality. still,
The same effect can be obtained also in the voice band signal transmission method according to claim 24.

According to the voice band signal transmission system according to the fifth aspect of the present invention, a communication path relating to its own connection is set to “voice transmission device → switch → voice” in response to a notification from another connection identification number detecting unit. Recognizing that it is installed on the `` transmission device, '' the routing correction of the cell of the voice band signal transmitted to the exchange through the uplink line related to this connection, without passing through the exchange, Since the cell of the voice band signal is transmitted through the downlink corresponding to the connection, the delay of the voice band signal and the deterioration of the voice quality are reliably prevented, and not the multiplexing unit which is the control system of the system, By providing this function to the switch interface, the system can be easily used even in the event of a failure or maintenance. Ri can be separated. Incidentally, claim 2
Similar effects can be obtained in the voice band signal transmission method described in Item 5.

According to the audio band signal transmission system according to the sixth aspect of the present invention, in addition to the effect according to the fifth aspect, the delay of the audio band signal and the deterioration of the audio quality can be reliably prevented. By providing this function not to the multiplexing unit, which is the control system of the system, but to the exchange interface unit, it is possible to easily disconnect from the system even when a failure occurs or during maintenance. The same effect can be obtained in the audio band signal transmission method according to claim 27.

According to the voice band signal transmission system of the present invention, a communication path relating to its own connection is set to “voice transmission device → switch → voice” in response to a notification from another connection identification number detecting unit. Recognizing that it is installed on the `` transmission device '', the multiplexing unit, the switching interface unit, and the switching unit are corrected by routing correction of the cell of the voice band signal transmitted to the switching unit through the uplink line related to this connection. Since the cells of the voice band signal are transmitted via the downlink corresponding to this connection without passing through, the cell multiplexing process of the multiplexing unit, the cell disassembly / assembly of the exchange interface unit, and the exchange The processing that occurs can be eliminated, and the delay of the voice band signal and the deterioration of the voice quality can be reliably prevented. Door can be. The same effect can be obtained in the audio band signal transmission method according to claim 27.

According to the voice band signal transmission system of the present invention, in addition to the effect of the above-mentioned claim, the present invention is realized by eliminating the voice compression coding / decoding processing of the exchange interface unit. It is possible to cope with the delay of the audio band signal most in the applied audio transmission device, and further, it is possible to reliably prevent the audio quality from deteriorating. The same effect can be obtained also in the audio band signal transmission method according to claim 28.

According to the voice band signal transmission system of the ninth aspect of the present invention, in response to a notification from another connection identification number detection unit, the communication path relating to its own connection is changed from “cell exchange → voice transmission device → When recognizing that “exchanger → voice transmission device → cell switch” is established, the cell of the voice band signal from the uplink line related to this connection is subjected to routing correction, so that the signal passes through the voice transmission device and the switch. Without transmitting the voice band signal to the downlink, the cell transmission processing of the voice transmission device, cell multiplexing processing and cell assembling / disassembling processing, and eliminating the processing that occurs in the exchange, It is possible to deal with the delay of the audio band signal most in the audio band signal transmission system to which the present invention is applied, and furthermore, the audio quality It is possible to reliably prevent reduction. The same effect can be obtained in the audio band signal transmission method according to claim 29.

According to the voice band signal transmission system of the tenth aspect of the present invention, in addition to the effect of the ninth aspect, the voice compression encoding / decoding processing in the exchange interface of the voice transmission apparatus can be eliminated. In the audio band signal transmission system to which the present invention is applied, the delay of the audio band signal can be dealt with most, and furthermore, the deterioration of the audio quality can be surely prevented. Claim 3
The same effect can be obtained in the voice band signal transmission method described in No. 0.

According to the audio band signal transmission system of the present invention, the cell of the audio band signal transmitted to its own connection is set to “audio” in response to the notification from the other connection identification number cell detection unit. It is determined that the communication path is established on the communication path of “transmission device → exchanger → voice transmission device”, and routing correction of the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is performed. Without passing through, the cell of the voice band signal is transmitted through the downlink corresponding to this own connection, so it is possible to eliminate processing such as cell disassembly / assembly that occurs when transmitting to the exchange, It is possible to reliably prevent the delay of the voice band signal and the deterioration of the voice quality. It should be noted that the same effect can be obtained in the voice band signal transmission method according to claim 31.

According to the voice band signal transmission system of the twelfth aspect of the present invention, the voice transmission device is constituted by three units: a switching interface unit, a transmission line interface unit, and a multiplexing unit. The same effect can be obtained in the audio band signal transmission method according to claim 32.

According to the voice band signal transmission system of the thirteenth aspect of the present invention, in response to a notification from another connection identification number cell detection unit, the communication path relating to its own connection is changed from “voice transmission device → exchanger → `` Voice transmission device '' is recognized, the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is subjected to routing correction, so that the signal passes through the exchange interface unit and the exchange. Instead, since the cells of the voice band signal are transmitted through the downlink corresponding to this own connection, it is possible to eliminate the cell disassembly / assembly processing that occurs in the switch interface unit and the processing that occurs in the switch. Furthermore, it is possible to reliably prevent delay of the voice band signal and deterioration of the voice quality. That. The same effect can be obtained in the audio band signal transmission method according to claim 33.

According to the voice band signal transmission system of the fourteenth aspect of the present invention, in addition to the effect of the thirteenth aspect, it is possible to eliminate the voice compression encoding / decoding processing of the exchange interface unit, and It is possible to reliably prevent signal delay and deterioration of voice quality. The same effect can be obtained in the voice band signal transmission method according to the thirty-fourth aspect.

[0212] According to the voice band signal transmission system of the present invention, the communication path relating to its own connection is changed to "voice transmission device → exchange → Voice transmission device ", the cell of the voice band signal transmitted to the exchange through the upstream line related to this connection is subjected to routing correction, so that this cell can be transmitted without passing through the exchange. The cell of the voice band signal is transmitted through the downlink corresponding to the connection of the above, so that the delay of the voice band signal and the deterioration of the voice quality can be reliably prevented, instead of the multiplexing unit which is the control system of the system. By providing this function to the switch interface, the system can be used even when a failure occurs or maintenance is performed. It can be separated into easy. The same effect can be obtained in the audio band signal transmission method according to claim 35.

According to the audio band signal transmission system according to claim 16 of the present invention, in addition to the effects of claim 15, the delay of the audio band signal and the deterioration of the audio quality thereof can be reliably prevented. By providing this function not to the multiplexing unit, which is the control system of the system, but to the exchange interface unit, it is possible to easily disconnect from the system even when a failure occurs or during maintenance. It should be noted that the same effect can be obtained in the audio band signal transmission method according to claim 36 of the present invention.

[0214] According to the voice band signal transmission system of the present invention, the communication path relating to its own connection is changed to "voice transmission device → exchange → Voice transmission device ", the routing unit corrects the cells of the voice band signal transmitted to the exchange through the uplink associated with this connection, so that the multiplexing unit, the exchange interface unit, and the exchange Without passing through, the cell of the voice band signal is transmitted through the downlink corresponding to this own connection, so the cell multiplexing processing of the multiplexing unit, the cell disassembly / assembly processing of the switching interface unit, The processing that occurs in the exchange can be eliminated, and the delay of the voice band signal and the deterioration of the voice quality can be assured. It is possible to prevent. The same effect can be obtained in the audio band signal transmission method according to claim 37.

According to the voice band signal transmission system according to the eighteenth aspect of the present invention, in addition to the effect according to the seventeenth aspect, the present invention is realized by eliminating the voice compression encoding / decoding processing of the exchange interface unit. It is possible to cope with the delay of the audio band signal most in the applied audio transmission device, and further, it is possible to reliably prevent the audio quality from deteriorating. It should be noted that the same effect can be obtained in the audio band signal transmission method according to claim 38 of the present invention.

According to the voice band signal transmission system according to the nineteenth aspect of the present invention, a communication path relating to its own connection is set to “cell exchange → voice transmission device” in response to a notification from another connection identification number cell detection unit. Recognizing that it is set to `` exchanger → voice transmission device → cell switch '', routing correction of the voice band signal from the upstream line related to this connection is performed, so that the signal passes through the voice transmission device and the switch. Instead, the voice band signal is transmitted to the downlink, so that the voice transmission device performs cell transmission processing, cell multiplexing processing,
By eliminating the disassembly process and the process that occurs in the exchange, it is possible to deal with the delay of the audio band signal most in the audio band signal transmission system to which the present invention is applied. Can be prevented. The same effect can be obtained in the audio band signal transmission method according to claim 39.

According to the audio band signal transmission system according to claim 20 of the present invention, in addition to the effect of claim 19, the present invention is realized by eliminating the audio compression encoding / decoding processing of the audio transmission device. The delay of the voice band signal can be dealt with most in the applied voice band signal transmission system, and further, the deterioration of the voice quality can be surely prevented. The same effect can be obtained in the voice band signal transmission method according to claim 40.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration inside a voice band signal transmission system shown in an embodiment of the present invention.

FIG. 2 is a block diagram showing a partial schematic configuration inside a voice transmission device in the voice band signal transmission system shown in the first embodiment;

FIG. 3 is a block diagram showing a schematic configuration of a part of the inside of an audio transmission device in the audio band signal transmission system according to the second embodiment;

FIG. 4 is a block diagram showing a schematic configuration of a part of the inside of an audio transmission device in the audio band signal transmission system shown in the third embodiment;

FIG. 5 is a block diagram showing a schematic configuration of a part of the inside of an audio transmission device in the audio band signal transmission system shown in the fourth embodiment;

FIG. 6 is a block diagram showing a schematic configuration of a part of the inside of a voice transmission device in a voice band signal transmission system according to a fifth embodiment;

FIG. 7 is a block diagram showing a schematic configuration of a part of the inside of an audio transmission device in the audio band signal transmission system shown in the sixth embodiment;

FIG. 8 is a block diagram showing a partial schematic configuration inside a voice transmission device and a cell switch in the voice band signal transmission system shown in the seventh embodiment;

FIG. 9 is a block diagram showing a partial schematic configuration inside a voice transmission device and a cell switch in the voice band signal transmission system shown in the eighth embodiment;

FIG. 10 is a block diagram showing a schematic configuration of a part of the inside of an audio transmission device in the audio band signal transmission system shown in the ninth embodiment;

FIG. 11 is a block diagram showing a schematic configuration of a part of the inside of an audio transmission device in the audio band signal transmission system shown in the tenth embodiment;

FIG. 12 is a block diagram showing a schematic configuration of a part of the inside of an audio transmission device in the audio band signal transmission system shown in the eleventh embodiment;

FIG. 13 is a block diagram showing a schematic configuration of a part of the inside of an audio transmission device in the audio band signal transmission system shown in the twelfth embodiment;

FIG. 14 is a block diagram showing a schematic configuration of a part of the inside of the audio transmission device in the audio band signal transmission system shown in the thirteenth embodiment;

FIG. 15 is a block diagram showing a schematic configuration of a part of the inside of the audio transmission device in the audio band signal transmission system shown in the fourteenth embodiment;

FIG. 16 is a block diagram showing a partial schematic configuration inside a voice transmission device and a cell switch in the voice band signal transmission system shown in the fifteenth embodiment;

FIG. 17 is a block diagram showing a partial schematic configuration inside a voice transmission device and a cell switch in the voice band signal transmission system shown in the sixteenth embodiment;

FIG. 18 is an explanatory diagram showing a cell format when audio is not compressed.

FIG. 19 is an explanatory diagram showing a cell format when audio is compressed.

FIG. 20 is an explanatory diagram showing a cell format of a control cell.

FIG. 21 is a block diagram showing an example of a conventional voice band signal transmission system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Switching apparatus 10 Voice transmission device 22, 22B Routing correction part 24, 24B Cell decomposition part 25, 25B Voice compression decoding part 26, 26B Connection identification number insertion part 29, 29B Voice compression encoding part 30, 30B Connection identification number detection part 32 Switch interface unit 33 Multiplexing unit 35 Transmission line interface unit 37 Cell switch 39,39B OAM / RM cell insertion unit (connection identification number cell transmission unit) 40,40B OAM / RM cell detection unit (connection identification number cell detection unit)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masao Aoki 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Matsushita Communication Industrial Co., Ltd. (72) Inventor Chika Toda Higashi-Yoshina Tsunashima, Kohoku-ku, Yokohama, Kanagawa Prefecture No.3-1, Matsushita Communication Industrial Co., Ltd. F-term (reference) CC03 HH34

Claims (40)

[Claims] 1. A voice transmission device, which is disposed between a switch and a cell switch, and has a voice transmission device for transmitting a voice band signal through an up line from the cell switch to the switch and a down line from the switch to the cell switch for each connection. A band signal transmission system, which is provided for each connection, sets a connection identification number for identifying each connection, and connects a cell of a voice band signal to be transmitted to the exchange through an upstream line related to the connection to the connection. A connection identification number insertion unit for inserting an identification number, and a connection identification number detection unit provided for each connection and detecting a connection identification number included in a cell of a voice band signal transmitted from the exchange via a down line related to its own connection. Department and for each connection, By performing routing correction on the cells of the voice band signal transmitted to the exchange through the uplink related to its own connection in accordance with the predetermined control signal before inputting the cell to the connection identification number insertion unit corresponding to this connection, Without going through
A routing correction unit for transmitting the cell of the voice band signal through the downlink corresponding to this connection, and among the connection identification number detection units provided for each connection, one connection identification number detection unit, When a connection identification number is detected through a downlink associated with the own connection, a notification is sent to a connection identification number detection unit corresponding to the connection identification number so as to output the predetermined control signal. system. 2. A voice transmission device comprising: an exchange interface unit for transmitting an audio band signal to / from an exchange; a transmission line interface unit for transmitting an audio band signal to / from a cell exchange; 2. The voice band signal transmission system according to claim 1, further comprising: a multiplexing unit disposed between the line interface units and transmitting a voice band signal between the exchange and the cell exchange. 3. A multiplexing unit of the voice transmission device, for each connection, a connection identification number inserting unit,
A connection identification number detection unit and a routing correction unit are accommodated, and the connection identification number detection unit responds to a notification from another connection identification number detection unit,
Upon recognizing that the communication path relating to the own connection is extended from "voice transmission device → exchanger → voice transmission device", a predetermined control signal is output to a routing correction unit corresponding to the connection and the routing correction is performed. The unit responds to the predetermined control signal,
3. The voice band signal transmission according to claim 2, wherein said voice band signal is transmitted to said downstream line without passing through said exchange interface unit and said exchange by routing-correcting said audio band signal from said upstream line. system. 4. An exchange interface unit of the voice transmission device, comprising: a compression encoding unit for compressing and encoding a voice band signal transmitted from the exchange via a downlink; and a voice band signal transmitted from a multiplexing unit via an uplink. 4. The audio band signal transmission system according to claim 3, further comprising a compression decoding unit that performs compression decoding. 5. An exchange interface unit of a voice transmission apparatus, comprising: a connection identification number insertion unit for each connection;
A connection identification number detection unit and a routing correction unit are accommodated, and the connection identification number detection unit responds to a notification from another connection identification number detection unit,
Upon recognizing that the communication path relating to the own connection is extended from "voice transmission device → exchanger → voice transmission device", a predetermined control signal is output to a routing correction unit corresponding to the connection and the routing correction is performed. The unit responds to the predetermined control signal,
3. The voice band signal transmission system according to claim 2, wherein said voice band signal is transmitted to a downstream line without passing through said exchange by routing-correcting a voice band signal from an upstream line. 6. An exchange interface section of a voice transmission apparatus, wherein a compression encoding of an audio band signal transmitted from the exchange via a downlink is performed, and the compression encoded voice band signal is transmitted to a connection identification number detecting section. 6. The voice band signal transmission system according to claim 5, further comprising: a compression decoding unit configured to compress and decode a voice band signal transmitted from the connection identification number insertion unit via an uplink. 7. The transmission line interface unit of the audio transmission device, for each connection, a connection identification number insertion unit,
A connection identification number detection unit and a routing correction unit are accommodated, and the connection identification number detection unit responds to a notification from another connection identification number detection unit,
Upon recognizing that the communication path relating to the own connection is extended from "voice transmission device → exchanger → voice transmission device", a predetermined control signal is output to a routing correction unit corresponding to the connection and the routing correction is performed. The unit responds to the predetermined control signal,
3. The voice band signal transmitted from the upstream line by performing routing correction, thereby transmitting the voice band signal to the downstream line without passing through the multiplexing unit, the switch interface unit and the switch. Voice band signal transmission system. 8. An exchange interface unit of the voice transmission device, comprising: a compression encoding unit for compressing and encoding a voice band signal transmitted from the exchange via a downlink; and a voice band signal transmitted from a multiplexing unit via an uplink. 8. The voice band signal transmission system according to claim 7, further comprising a compression decoding unit that performs compression decoding. 9. The cell switch, for each connection, a connection identification number insertion unit,
A connection identification number detection unit and a routing correction unit are accommodated, and the connection identification number detection unit responds to a notification from another connection identification number detection unit,
The communication path related to its own connection is "Cell switch →
When recognizing that "voice transmission device → exchanger → voice transmission device → cell switching device” is established, a predetermined control signal is output to a routing correction unit corresponding to this connection, and the routing correction unit performs the predetermined control. Depending on the signal,
By performing routing correction on the voice band signal from the uplink, without passing through the voice transmission device and the exchange,
2. The voice band signal transmission system according to claim 1, wherein said voice band signal is transmitted to a downlink. 10. A voice transmission device, comprising: a compression encoding section for compressing and encoding a voice band signal transmitted from an exchange via a downlink; and a compression section for compressing and decoding an audio band signal transmitted from a cell exchange via an uplink. The audio band signal transmission system according to claim 9, further comprising a decoding unit. 11. A system, wherein the system is located between a switch and a cell switch,
An audio band signal transmission system having an audio transmission device for transmitting an audio band signal through an uplink from the cell exchange to the exchange and a downlink from the exchange to the cell exchange for each connection, provided for each connection, A connection identification number to be identified for each connection is set, and apart from the cell of the voice band signal transmitted to the exchange through the uplink line related to the own connection, the connection identification number of the own band is paired with the cell of the voice band signal. And a connection identification number cell transmitting unit for transmitting a control cell including a control cell which is provided for each connection and which is paired with a cell of a voice band signal transmitted from the exchange through a down line related to its own connection. To detect the connection identification number contained in this control cell. A connection identification number cell detection unit, which is provided for each connection and transmits a cell of a voice band signal transmitted to an exchange through an uplink associated with the connection according to a predetermined control signal to a connection identification number cell transmission corresponding to the connection; A routing correction unit that transmits a cell of a voice band signal through a downlink corresponding to this own connection without passing through the exchange, by performing routing correction before inputting to the connection unit. When one of the provided connection identification number cell detectors detects a connection identification number through a downlink associated with its own connection, the connection identification number cell detector corresponding to the connection identification number is detected. Outputs the predetermined control signal to Voiceband signal transmission system and notifies to so that. 12. A voice transmission apparatus, comprising: an exchange interface unit for transmitting an audio band signal to / from an exchange; a transmission line interface unit for transmitting an audio band signal to / from a cell exchange; 12. The voice band signal transmission system according to claim 11, further comprising: a multiplexing unit disposed between the line interface units and transmitting a voice band signal between the exchange and the cell exchange. 13. The multiplexing unit of the voice transmission device, for each connection, accommodates a connection identification number cell transmission unit, a connection identification number cell detection unit, and a routing correction unit, wherein the connection identification number cell detection unit In response to the notification from the other connection identification number cell detection unit, if it recognizes that the communication path related to its own connection has been extended to "voice transmission device → exchange → voice transmission device", A predetermined control signal is output to a routing correction unit corresponding to the following, and the routing correction unit responds to the predetermined control signal
13. The voice band signal transmission according to claim 12, wherein a routing correction of the voice band signal from the upstream line transmits the voice band signal to the downstream line without passing through the exchange interface unit and the exchange. system. 14. An exchange interface unit of a voice transmission device, comprising: a compression encoding unit for compressing and encoding an audio band signal transmitted from an exchange via a downlink; and a voice band signal transmitted from a multiplexing unit via an uplink. 14. The voice band signal transmission system according to claim 13, further comprising a compression decoding unit that performs compression decoding. 15. The switch interface unit of the voice transmission device, for each connection, accommodates a connection identification number cell transmission unit, a connection identification number cell detection unit, and a routing correction unit, and the connection identification number cell detection unit In response to the notification from the other connection identification number cell detection unit, if it recognizes that the communication path related to its own connection has been extended to "voice transmission device → exchange → voice transmission device", A predetermined control signal is output to a routing correction unit corresponding to the following, and the routing correction unit responds to the predetermined control signal
13. The voice band signal transmission system according to claim 12, wherein the voice band signal from the upstream line is subjected to routing correction to transmit the voice band signal to the downstream line without passing through the exchange. 16. An exchange interface section of a voice transmission apparatus, wherein a compression code for compressing and encoding a voice band signal transmitted from the exchange via a downlink and transmitting the compression-coded voice band signal to a connection identification number cell detection section. 16. The audio band signal transmission system according to claim 15, comprising: a decoding unit; and a compression decoding unit that compresses and decodes the audio band signal transmitted from the connection identification number cell transmission unit via the uplink. 17. The transmission line interface unit of the voice transmission device, for each connection, accommodates a connection identification number cell transmission unit, a connection identification number cell detection unit, and a routing correction unit. In response to the notification from the other connection identification number cell detection unit, the unit recognizes that the communication path relating to its own connection is set up in “voice transmission device → exchanger → voice transmission device”, and this unit A predetermined control signal is output to a routing correction unit corresponding to the connection, and the routing correction unit responds to the predetermined control signal,
13. The method according to claim 12, wherein a routing correction of the voice band signal from the uplink is transmitted to the downlink without passing through the multiplexing unit, the switching interface unit and the switching unit. Voice band signal transmission system. 18. An exchange interface unit of an audio transmission apparatus, comprising: a compression encoding unit for compressing and encoding an audio band signal transmitted from an exchange via a downlink; and an audio band signal transmitted from a multiplexing unit via an uplink. The audio band signal transmission system according to claim 17, further comprising: a compression decoding unit configured to perform compression decoding. 19. The cell exchange contains, for each connection, a connection identification number cell transmission unit, a connection identification number cell detection unit, and a routing correction unit. In response to the notification from the identification number cell detection unit, when it recognizes that the communication path relating to its own connection has been established in the order of "cell exchange → voice transmission device → exchange → voice transmission device → cell exchange," A predetermined control signal is output to a routing correction unit corresponding to the connection, and the routing correction unit responds to the predetermined control signal,
By performing routing correction on the voice band signal from the uplink, without passing through the voice transmission device and the exchange,
The voice band signal transmission system according to claim 11, wherein the voice band signal is transmitted to a downlink. 20. A voice transmission device, comprising: a compression encoding section for compressing and encoding a voice band signal transmitted from an exchange via a downlink; and a compressor for compressing and decoding an audio band signal transmitted from a cell exchange via an uplink. 20. The audio band signal transmission system according to claim 19, further comprising a decoding unit. 21. A voice transmission device arranged between a switching system and a cell switching system, wherein a voice for transmitting a voice band signal through an up line from the cell switching system to a switching system and a down line from the switching system to the cell switching system for each connection. A bandwidth signal transmission method, wherein a connection identification number inserted for each connection is set in a connection identification number insertion unit provided for each connection, and a voice band transmitted to the exchange through an up line relating to the own connection. Inserts its own connection identification number into the cell of the signal, and further includes a connection identification number detection unit provided for each connection, which is included in the cell of the voice band signal transmitted from the exchange through the downlink related to its own connection. Connection identification number to be detected, and In the provided routing correction unit, before inputting the cell of the voice band signal transmitted to the exchange through the uplink related to its own connection according to the predetermined control signal to the connection identification number insertion unit corresponding to this connection By performing the routing correction, the cell of the voice band signal is transmitted through the downlink corresponding to the own connection without passing through the exchange, and one of the connection identification number detectors provided for each of the connections is transmitted. The connection identification number detection unit
When a connection identification number is detected through a downlink associated with the own connection, a notification is sent to a connection identification number detection unit corresponding to the connection identification number so as to output the predetermined control signal. Method. 22. A voice transmission device, comprising: an exchange interface unit for transmitting an audio band signal to / from an exchange; a transmission line interface unit for transmitting an audio band signal to / from a cell exchange; 22. The voice band signal transmission method according to claim 21, further comprising: a multiplexing unit disposed between the line interface units for transmitting a voice band signal between the exchange and the cell exchange. 23. The multiplexing unit of the audio transmission device, for each connection, accommodates a connection identification number insertion unit, a connection identification number detection unit, and a routing correction unit,
When the connection identification number detection unit recognizes that the communication path relating to its own connection is set to “voice transmission device → exchanger → voice transmission device” in response to a notification from another connection identification number detection unit. Outputs a predetermined control signal to a routing correction unit corresponding to the own connection, and the routing correction unit performs a routing correction on a voice band signal from an uplink in accordance with the predetermined control signal, thereby obtaining the switching interface. 23. The voice band signal transmission method according to claim 22, wherein the voice band signal is transmitted to a downlink without passing through a unit and an exchange. 24. An exchange interface unit of the audio transmission apparatus, comprising: a compression encoding unit for compressing and encoding an audio band signal transmitted from the exchange via a downlink; and an audio band signal transmitted from a multiplexing unit via an uplink. 24. A compression decoding unit for performing compression decoding.
A method for transmitting a voice band signal according to any one of the preceding claims. 25. An exchange interface unit of a voice transmission apparatus accommodates, for each connection, a connection identification number insertion unit, a connection identification number detection unit, and a routing correction unit. In response to the notification from the connection identification number detection unit, the communication path related to the
When recognizing that the connection is established between the switching device and the voice transmission device, the control unit outputs a predetermined control signal to a routing correction unit corresponding to the connection of the switching unit.
23. The method according to claim 22, wherein the voice band signal from the upstream line is subjected to routing correction in accordance with the predetermined control signal, thereby transmitting the voice band signal to the downstream line without passing through the exchange. Voice band signal transmission method. 26. A switch interface unit of a voice transmission apparatus, which compression-codes a voice band signal transmitted from a switch via a downlink and transmits the compression-coded voice band signal to a connection identification number detecting unit. 26. The voice band signal transmission method according to claim 25, further comprising: a compression decoding unit configured to compress and decode a voice band signal transmitted from the connection identification number insertion unit via an uplink. 27. The transmission line interface unit of the audio transmission device accommodates, for each connection, a connection identification number insertion unit, a connection identification number detection unit, and a routing correction unit, wherein the connection identification number detection unit includes: In response to the notification from the other connection identification number detecting unit, the communication path relating to the own connection is changed to “voice transmission device →
When recognizing that the connection is established between the switching device and the voice transmission device, the control unit outputs a predetermined control signal to a routing correction unit corresponding to the connection of the switching unit.
According to the predetermined control signal, by performing routing correction on the voice band signal from the uplink, it is possible to transmit the voice band signal to the downlink without passing through the multiplexing unit, the switch interface unit and the switch. 23. The method according to claim 22, further comprising the steps of: 28. An exchange interface unit of an audio transmission apparatus, comprising: a compression encoding unit for compressing and encoding an audio band signal transmitted from an exchange via a downlink; and an audio band signal transmitted from a multiplexing unit via an uplink. 28. A compression decoding section for performing compression decoding.
A method for transmitting a voice band signal according to any one of the preceding claims. 29. The cell switch, for each connection,
A connection identification number insertion unit, a connection identification number detection unit, and a routing correction unit are accommodated, and the connection identification number detection unit performs communication related to its own connection in response to a notification from another connection identification number detection unit. Upon recognizing that the path is extended from "cell exchange → voice transmission device → exchange → voice transmission device → cell exchange", it outputs a predetermined control signal to a routing correction unit corresponding to this connection, and performs this routing correction. The department is
The voice band signal from the upstream line is corrected in accordance with the predetermined control signal, so that the voice band signal is transmitted to the downstream line without passing through the voice transmission device and the exchange. Item 22. The voice band signal transmission method according to Item 21. 30. A voice transmission device, comprising: a compression encoding section for compressing and encoding a voice band signal transmitted from an exchange via a downlink; and a compression section for compressing and decoding an audio band signal transmitted from a cell exchange via an uplink. 30. The voice band signal transmission method according to claim 29, further comprising a decoding unit. 31. A voice transmission device arranged between a switching system and a cell switching system, wherein a voice for transmitting a voice band signal through an upstream line from the cell switching system to the switching system and a downstream line from the switching system to the cell switching system for each connection. A band signal transmission method, wherein a connection identification number for each connection is set in a connection identification number cell transmission unit provided for each connection, and a voice transmitted to the exchange through an uplink associated with the connection. Aside from the cell of the band signal, a control cell including its own connection identification number is transmitted in pair with the cell of the audio band signal, and further, a connection identification number cell detection unit provided for each connection, The security of the voice band signal transmitted from the exchange through the down line related to its own connection. Control cell paired with the
A connection identification number contained in the control cell is detected, and further, a routing correction unit provided for each connection, in response to a predetermined control signal, a voice band signal transmitted to an exchange through an uplink associated with its own connection. The cell of the voice band signal is corrected by routing correction before inputting the cell to the connection identification number cell transmission unit corresponding to this connection, without passing through the exchange, through the downlink corresponding to this own connection. When the connection identification number cell detector of the connection identification number cell detector provided for each connection transmits and detects the connection identification number through the down line related to its own connection, the connection identification number cell detector corresponds to this connection identification number. Connection identification number cell detector Voice band signal transmission method and notifies to output a serial predetermined control signal. 32. A voice transmission device, comprising: an exchange interface unit for transmitting an audio band signal to / from an exchange; a transmission line interface unit for transmitting an audio band signal to / from a cell exchange; 32. The voice band signal transmission method according to claim 31, further comprising a multiplexing unit disposed between the line interface units and transmitting a voice band signal between the exchange and the cell exchange. 33. A multiplexing unit of a voice transmission device, for each connection, accommodating a connection identification number cell transmission unit, a connection identification number cell detection unit, and a routing correction unit, wherein the connection identification number cell detection unit Is, in response to the notification from the other connection identification number cell detection unit,
When it recognizes that the communication path relating to its own connection is set up in "voice transmission device → exchanger → voice transmission device", it outputs a predetermined control signal to a routing correction unit corresponding to this connection, and performs this routing correction. The unit, in accordance with the predetermined control signal, performs routing correction on the voice band signal from the upstream line, thereby transmitting the voice band signal to the downstream line without passing through the exchange interface unit and the exchange. Claim 3
3. The voice band signal transmission method according to 2. 34. An exchange interface unit of the audio transmission device, comprising: a compression encoding unit for compressing and encoding an audio band signal transmitted from the exchange via the downlink; and an audio band signal transmitted from the multiplexing unit via the uplink. 34. A compression decoding unit for performing compression decoding.
A method for transmitting a voice band signal according to any one of the preceding claims. 35. An exchange interface unit of a voice transmission apparatus, for each connection, accommodating a connection identification number cell transmission unit, a connection identification number cell detection unit, and a routing correction unit, wherein the connection identification number cell detection unit In response to the notification from the other connection identification number cell detecting unit, when it recognizes that the communication path related to its own connection is extended to "voice transmission device → exchange → voice transmission device", A predetermined control signal is output to a routing correction unit corresponding to, and the routing correction unit performs routing correction on a voice band signal from the uplink according to the predetermined control signal, without passing through the exchange, 33. The voice band signal transmission method according to claim 32, wherein the voice band signal is transmitted to a downlink. 36. A switching interface unit of a voice transmission apparatus, which compresses and encodes a voice band signal transmitted from a switching unit via a down line, and transmits the compression coded voice band signal to a connection identification number cell detecting unit. 36. The voice band signal transmission method according to claim 35, further comprising: a decoding unit that compresses and decodes a voice band signal transmitted from the connection identification number cell transmission unit via the uplink. 37. A transmission line interface unit of a voice transmission apparatus, for each connection, accommodating a connection identification number cell transmission unit, a connection identification number cell detection unit, and a routing correction unit. In response to the notification from the other connection identification number cell detecting unit, the unit recognizes that the communication path relating to its own connection is set up in “voice transmission device → exchanger → voice transmission device”, and then recognizes its own communication path. A predetermined control signal is output to a routing correction unit corresponding to the connection, and the routing correction unit performs a routing correction on a voice band signal from an uplink in accordance with the predetermined control signal, so that the multiplexing unit and the switch interface The voice band signal is transmitted to the downlink without passing through a switching unit and a switch. Item 33. The audio band signal transmission method according to Item 32. 38. An exchange interface unit of the audio transmission apparatus, comprising: a compression encoding unit for compressing and encoding an audio band signal transmitted from the exchange via the downlink; and an audio band signal transmitted from the multiplexing unit via the uplink. 38. A compression decoding unit for performing compression decoding.
A method for transmitting a voice band signal according to any one of the preceding claims. 39. The cell switch, for each connection,
A connection identification number cell transmission unit, a connection identification number cell detection unit, and a routing correction unit are accommodated, and the connection identification number cell detection unit responds to a notification from another connection identification number cell detection unit. Upon recognizing that the communication path related to the connection extends from "cell exchange → voice transmission equipment → exchange → voice transmission equipment → cell exchange", it outputs a predetermined control signal to the routing correction unit corresponding to this connection. The routing correction unit transmits the voice band signal to the downlink without passing through the voice transmission device and the exchange by performing routing correction on the voice band signal from the uplink according to the predetermined control signal. 4. The method according to claim 3, wherein
2. The voice band signal transmission method according to 1. 40. A voice transmission device, comprising: a compression encoding section for compressing and encoding a voice band signal transmitted from an exchange via a downlink; and a compression section for compressing and decoding an audio band signal transmitted from a cell exchange via an uplink. 40. The audio band signal transmission method according to claim 39, further comprising a decoding unit.