JP2000036800A - Equipment and method for multiple communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide equipment and method for multiple communication, capable of efficiently transmitting the data of various media. SOLUTION: At transmission side equipment, a slot insertion control part 7 discriminates the presence/absence of audio information inputted and stored from respective channels to respective audio information encoding parts 1 within unit time at every fixed unit time which is synchronized between respective audio channels. Furthermore, only when there is audio information on channel to which the time of a time slot is not assigned, is a time slot control signal generated, and the information is inserted to an arbitrary time slot and sent through a time division multiplexing part 4 onto a transmission line 3. At reception side equipment, the time dividing frame is received by a time division demultiplexing part 5, the control method of a time slot to be continuously received is discriminated by the information of the time slot, and the frame is outputted while being distributed for encoding information corresponding to the channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a multiplex communication apparatus and a multiplex communication method used for multimedia multiplex transmission and the like.

[0002]

2. Description of the Related Art A conventional time slot multiplexing method of a time division multiplexing (TDM) apparatus mainly uses fixed channel allocation, and a time slot is allocated for each medium.

FIG. 6 is a conceptual diagram illustrating a conventional fixed channel allocation method.

In FIG. 1, reference numeral 110 denotes a transmitting device, and reference numeral 120 denotes a receiving device. 130 is a transmission line laid between the transmitting device 110 and the receiving device 120. The transmitting device 110 includes a time division multiplexing unit 111, and the receiving device 120 includes a time division demultiplexing unit 121. The time division multiplexing section 111 multiplexes the information of each channel in a time division manner and sends a time division multiplexed frame 140 to the transmission path 130.
Is distributed to each channel.

[0005] A conventional information transmission method having the above configuration will be described.

[0006] Information of each channel is inserted into a time slot fixedly allocated on a time-division frame 140 by a time-division multiplexing unit 111 of the transmitting apparatus 110 and transmitted to a transmission path 130. The time-division demultiplexing unit 121 of the reception-side apparatus 120 extracts the time-division multiplexed data received from the transmission path 130 according to the fixedly allocated time slots and distributes the data to each channel.

[0007]

However, in the above conventional example, since the time slot for each medium is fixedly allocated, there are the following problems.

(1) Since the data flowing in the time slot is for each medium, the band within the same line cannot be used efficiently.

(2) In the case of using audio media, even if silence is detected and data transmission is stopped, a time slot on the transmission path is allocated, so that invalid data is transmitted and line efficiency is improved. Cause trouble.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a multiplex communication apparatus and a multiplex communication method capable of efficiently transmitting data of various media.

[0011]

According to a first aspect of the present invention, a plurality of information input sections for inputting voice or data, respectively, and time-division multiplexing of input information from the information input sections are provided. A transmitting apparatus having a time division multiplexing unit, a transmission path for transmitting a data frame multiplexed by the time division multiplexing unit, and time division for separating the time division multiplexed data transmitted through the transmission path into a plurality of pieces of information. A multiplex communication apparatus comprising: a separation unit, and a reception-side device having a plurality of information output units that respectively output voice or data based on output information from the time division separation unit.
Detecting a change in the input state to each of the information input units, and generating state change information, providing a transmission-side control unit for performing time allocation of a time slot in the transmission-side device, the time-division multiplexing unit includes: A transmission frame is constructed in accordance with the state change information generated by the transmission-side control unit and the time slot allocation, and the reception-side apparatus has a time slot time allocation based on the frame transmitted through the transmission path. And a receiving-side controller for controlling the information output units.

[0012] In a second aspect based on the first aspect, the time division multiplexing section is configured to transmit a time slot control signal representing the state change information onto a transmission frame by transmitting the time slot control signal on the transmission frame. The division / separation unit is configured to separate the time division multiplexed data into a plurality of information based on the time slot control signal.

[0013] In a third aspect based on the second aspect, the transmission-side control unit is configured to, for each fixed unit time synchronized between the audio channels, transmit the audio input from each channel within the unit time. The time-division multiplexing unit generates the time-slot control signal when there is audio information on a channel to which no time-slot is assigned, and generates an arbitrary time. The information is inserted into the slot.

[0014] In a fourth aspect based on the third aspect, the time division multiplexing section generates the time slot control signal when there is no audio information on a channel to which no time slot is allocated. Instead, the previous frame is transmitted in the same configuration.

According to a fifth aspect of the present invention, there is provided a transmitting apparatus having a plurality of information input sections for inputting voice or data, and a time division multiplexing section for time division multiplexing input information from each of the information input sections. A transmission path for transmitting the data frame multiplexed by the division multiplexing section, a time division separation section for separating the time division multiplexed data transmitted through the transmission path into a plurality of pieces of information, and output information from the time division separation section. A receiving-side device having a plurality of information output units for outputting voice or data based on the multiplex communication device, and detecting a change in an input state to each of the information input units with respect to the transmitting-side device. And the time change of the slots, and the transmission side control processing for constructing the transmission frame according to the time change of the state change information and the slots. And performs, on the receiving side device, a receiving side control process for recognizing the time allocation of slots from the frame transmitted through the transmission path and controlling the information output units. .

In a sixth aspect based on the fifth aspect, the time division multiplexing section is used to transmit a time slot control signal representing the state change information on a transmission frame to the transmission line, The time division multiplexed data is separated into a plurality of pieces of information based on the time slot control signal using a division / separation unit.

[0017] In a seventh aspect based on the sixth aspect, in the transmission-side control processing, at every fixed unit time synchronized between the respective audio channels, the audio input from each channel within the unit time is performed. The presence / absence of information is determined, and the time division multiplexing unit is used to generate the time slot control signal and output the time slot control signal to an arbitrary time slot when there is audio information in a channel to which no time slot is allocated. This information is inserted.

[0018] In an eighth aspect based on the seventh aspect, the time slot control signal is used when there is no audio information on a channel to which no time slot is allocated using the time division multiplexing section. The previous frame is transmitted in the same configuration without being generated.

[0019]

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

FIG. 1 is a block diagram showing a schematic configuration of a multiplex communication apparatus according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes an audio information encoding unit provided for each audio channel, reference numeral 2 denotes a flow control unit provided for a band variable channel, and reference numeral 3 denotes a transmission path. Reference numeral 4 denotes a time-division multiplexing unit, which time-division multiplexes audio information generated by the audio information encoding unit 1 for each audio channel to form a frame 10 and sends it out to the transmission path 3. Reference numeral 5 denotes a time division demultiplexer, which distributes the time division multiplex frame 10 received from the transmission path 3 to each output channel.

Reference numeral 6 denotes an audio information decoding unit, which is provided for each audio channel and decodes audio information from multiplexed and demultiplexed audio information. Reference numeral 7 denotes a slot insertion control unit which receives information on the presence / absence of data from the audio information encoding unit 1 and allocates channels to the frame 10. Reference numeral 8 denotes a slot separation control unit which notifies the audio information decoding unit 6 of the presence / absence of data based on the slot control information received from the time division separation unit 5. Reference numeral 10 denotes a transfer frame, which is created by the time division multiplexing unit 4 and transmitted on the transmission path 3. This frame format is shown in FIG.

In FIG. 2, a frame signal S1 is a signal for identifying a time division multiplexed frame. The time slot control presence / absence signal S2 is a signal indicating the presence / absence of the time slot control signal S3 in the frame. When “1”, the time slot control signal S3 indicates “present”, and when “0”, the time slot control signal S3 The control signal S3 indicates "none". The time slot control signal S3 is a signal for dynamically performing channel control of the audio channel / variable band channel region 12, and the variable band channel region 11 is a transmission channel dedicated to the variable band channel.

Voice channel / Bandwidth variable channel area 12
Is a channel for transmitting voice information and band variable information, and sets the allocation of slots for a unit time by the time slot control signal S3.

FIG. 3 is a diagram showing a configuration of the time slot control signal S3.

The channel identification signal 21 indicates a channel used for voice. For example, in the case of "001", channel 1c
h, and “010” indicates channel 2ch,
"011" indicates channel 3ch and "100"
Indicates channel 4ch, “101” indicates channel 5ch, and “110” indicates channel 6c
h.

The command end 22 indicates the presence / absence of the next control signal. If it is present, it is set to "1", followed by the channel identification as the next command, and if there is no next command (final command), it is set to "0". ".

Hereinafter, the interrelationship and operation of the above components will be described.

First, FIG. 4A shows a first frame state in which no transmission data exists in the audio information encoding unit 1 and all channels are set to band variable data.

In the unit time for transmitting the frame shown in FIG. 4A, the audio information is "present" in channel 6ch, and when the audio information encoding unit 1 detects this, the time division multiplexing unit In step 4, state change information is created. Then, the time slot control presence / absence signal S2 is set to "1", the time slot control signal S3 is inserted, audio information is inserted into the channel 6ch, and the other slots transmit frames with the same configuration as the first frame. This second frame state is shown in FIG. The time slot of the channel 6ch is determined by the receiving device and the implementation rules. Nine frames transmitted after this frame are allocated to voice.
FIG. 5A shows the contents of the time slot control signal (S3) TSCONT.

In the unit time for transmitting the second frame, the audio information is "present" in channel 1ch and channel 2ch, and when the audio information encoding unit 1 detects this, the time division multiplexing unit 4 Create state change information with
The time slot control presence / absence signal S2 is set to “1”, the time slot control signal S3 is inserted, and the channel 1ch, 2c
The audio information is inserted into h, and the other slots transmit frames in the same configuration as the second frame. This third frame state is shown in FIG. 4C, and the time slot control signal TS
FIG. 5B shows the contents of CONT.

In the unit time for transmitting the fourth frame to the tenth frame, channel 1ch and channel 2ch
If the audio information does not become “present” other than the channel 6ch, the time slot control presence / absence signal S2
Is set to "0", and the time slot control signal S3 is not inserted, and the frame is transmitted in the same configuration as the third frame. The state of the fourth to eleventh frames is shown in FIG.

If the audio information does not become "present" in channels other than channels 1 and 2 within the unit time for transmitting the eleventh frame, the time slot control presence / absence signal S2 is set to "0" and the time slot control signal S3
Is inserted, audio information is inserted into channels 1ch and 2ch, and the other slots transmit frames in a configuration allocated to variable band data. The channel 6ch is subjected to the presence / absence check of the audio information again because 10 frames of the time allocation have elapsed. The state of the twelfth frame is shown in FIG.

In all the audio channels within the unit time for transmitting the twelfth frame, audio information is "present".
If not, the time slot control presence / absence signal S
2 is set to "0" and the time slot control signal S3 is not inserted, and all slots transmit frames in a configuration allocated to the variable band data. Since channel 1ch and channel 2ch have passed 10 frames of time allocation, they are again subjected to audio information presence / absence check. The state of the thirteenth frame is shown in FIG.

In the present embodiment, the number of frames to which sound is allocated is nine, but another number of frames may be used.
The determination of the number of frames may be set at the time of negotiation between transmission and reception.

In short, according to the present embodiment, the transmitting device multiplexes voice information of a plurality of voice channels and data transmission of a variable band and transmits the multiplexed data to the transmission path, and the receiving device performs individual demultiplexing by demultiplexing. The time division multiplexing transmission system for extracting voice information and variable band data employs the following means.

In the transmitting apparatus, for each fixed unit time synchronized between the audio channels, the presence or absence of the audio information input to and stored in each audio information encoding unit 1 from each channel within the unit time is determined. The determination is performed by the slot insertion control unit 7, and only when there is audio information in a channel to which no time slot is allocated, a time slot control signal S3 is generated and the information is inserted into an arbitrary time slot. , Slots are inserted with voices in time slots to which voices are assigned, and band variable data are inserted into other time slots.
Send up.

When the presence of voice information is detected in a channel to which a time slot is not allocated within the unit time for transmitting the frame, the same operation as described above is performed. Signal S
3 is not generated, and the previous frame is transmitted with the same configuration.

The time slot control signal S3 is used for allocating a time slot of a frame a plurality of times in one transmission. Even if the speech information encoding unit 1 indicates "information present", the time slot control signal S3 is transmitted every frame. The control signal S3 is not transmitted. By repeating this operation, data is sequentially transmitted.

In the receiving apparatus, the time-division frame is received by the time-division demultiplexing unit 5, and the control method of the time slot to be subsequently received is determined based on the information of the time-slot control signal S3, and the time slot is controlled corresponding to the channel. By distributing and outputting the data for information encoding, data reception for one unit time is completed. By repeating this operation,
The multiplexed data is received sequentially.

According to the multiplex communication apparatus of the present embodiment, the transmitting apparatus notifies the receiving apparatus when the time slot state information changes, and performs a plurality of times by using one time slot control signal S3. The time slot of the frame is reserved. As a result, band variable information can be inserted into an empty channel, the control information band can be reduced, and efficient time-division transmission of user information can be realized. The receiving apparatus can perform demultiplexing based on the change information of the time slot, and distributes and outputs the information of each slot to each channel.

[0042]

As described above, according to the multiplex communication apparatus of the first invention, a change in the input state to each information input unit is detected to generate state change information, and time allocation of slots is performed. The transmission-side control unit that performs the transmission-side control unit is provided in the transmission-side device, and the time-division multiplexing unit is configured to construct a transmission frame in accordance with the state change information generated by the transmission-side control unit and the time allocation of the slots. Has a receiving side control unit that recognizes the time allocation of slots from frames transmitted through the transmission path and controls each information output unit, so that data can be transmitted without fixing the band within the same line, Data of various media can be transmitted efficiently.

According to the multiplex communication apparatus of the second invention,
In the first aspect, the time division multiplexing unit is configured to transmit a time slot control signal representing the state change information on a transmission frame to a transmission line, and the time division demultiplexing unit based on the time slot control signal. Since the time division multiplexed data is divided into a plurality of pieces of information, the data can be transmitted without fixing the band by the time slot control signal, and the data of various media can be transmitted efficiently.

According to the multiplex communication apparatuses of the third and fourth inventions, the effects of the second invention can be obtained simply and accurately.

According to the multiplex communication method of the fifth invention,
An effect equivalent to that of the first aspect is provided.

According to the multiplex communication method of the sixth invention,
In the fifth aspect, an effect equivalent to that of the second aspect is obtained.

According to the multiplex communication method of the seventh invention,
In the fifth aspect, an effect equivalent to that of the third aspect is obtained.

According to the multiplex communication method of the eighth invention,
In the fifth aspect, an effect equivalent to that of the fourth aspect is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a multiplex communication device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a frame format according to the embodiment;

FIG. 3 is a diagram illustrating a configuration of a time slot control signal according to the embodiment.

FIG. 4 is a diagram illustrating an operation example of the embodiment.

FIG. 5 is a diagram showing the contents of a time slot control signal S3.

FIG. 6 is a configuration diagram of a conventional multiplex communication device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 audio information encoding unit 2 flow control unit 3 transmission path 4 time division multiplexing unit 5 time division separation unit 6 audio information decoding unit 7 slot insertion control unit 8 slot separation control unit 10 transfer frame

Claims (8)

[Claims] A transmitting side device having a plurality of information input units for inputting voice or data, and a time division multiplexing unit for time division multiplexing input information from each of the information input units; A transmission path for transmitting the multiplexed data frame, and a time division demultiplexer for separating the time division multiplexed data transmitted through the transmission path into a plurality of pieces of information;
And a receiving side device having a plurality of information output units for respectively outputting voice or data based on output information from the time division separation unit, wherein a change in an input state to each of the information input units is provided. Along with detecting the state change information and providing a transmission-side control unit for performing time allocation of a time slot in the transmission-side device, the time-division multiplexing unit includes the state-change information generated by the transmission-side control unit. The transmission device is configured to construct a transmission frame according to a time slot allocation, and the receiving device recognizes a time slot allocation from a frame transmitted through the transmission path and controls the information output units. A multiplex communication device, comprising: 2. The time-division multiplexing section is configured to transmit a time slot control signal representing the state change information to a transmission frame through a transmission frame, and the time division demultiplexing section transmits the time slot control signal to the time slot control signal. 2. The multiplex communication apparatus according to claim 1, wherein the time division multiplexed data is divided into a plurality of information based on the multiplexed data. 3. The transmission-side control section is configured to determine, for each fixed unit time synchronized between the audio channels, whether or not there is audio information input from each channel within the unit time. The time division multiplexing unit is configured to generate the time slot control signal and insert the information into an arbitrary time slot when there is audio information in a channel to which the time slot is not time-allocated. 3. The multiplex communication device according to claim 2, wherein: 4. The time division multiplexing unit transmits the previous frame with the same configuration without generating the time slot control signal when there is no audio information on a channel to which no time slot is allocated. 4. The multiplex communication apparatus according to claim 3, wherein: 5. A transmitting apparatus comprising: a plurality of information input units for inputting voice or data; and a time division multiplexing unit for time division multiplexing input information from each of the information input units; A transmission path for transmitting the multiplexed data frame, and a time division demultiplexer for separating the time division multiplexed data transmitted through the transmission path into a plurality of pieces of information;
And a multiplex communication device including a reception-side device having a plurality of information output units that respectively output voice or data based on output information from the time-division demultiplexing unit. A transmission-side control process for detecting a change in the input state to the information input unit and generating state change information, allocating time to slots, and constructing a transmission frame according to the state change information and the time allocation of slots. Multiplex communication for the receiving-side device to execute a receiving-side control process of recognizing a time allocation of a slot from a frame transmitted through the transmission path and controlling each of the information output units. Method. 6. A time-slot control signal representing the state change information is transmitted on the transmission frame by using the time-division multiplexing unit and transmitted to the transmission line. 6. The multiplex communication method according to claim 5, wherein the time division multiplexed data is separated into a plurality of pieces of information based on the signal. 7. The transmission-side control processing determines, for each fixed unit time synchronized between the respective audio channels, the presence / absence of audio information input from each channel within the unit time. When there is audio information in a channel to which a time slot is not assigned using a multiplexing unit, the time slot control signal is generated and the information is inserted into an arbitrary time slot. Item 7. The multiplex communication method according to Item 6. 8. When the time-division multiplexing unit is used and there is no audio information in a channel to which no time slot is allocated, the previous frame is transmitted in the same configuration without generating the time slot control signal. The multiplex communication method according to claim 7, wherein: