SU1317680A1 - Multichannel data transmission device - Google Patents

Abstract

The invention relates to telecommunications. The purpose of the invention is to increase the transmission speed. The device contains speech detectors 1, key memory elements 2, data readout block 3, control signal formers 4 and 11, signal shaping unit (BF) 5 instantaneous signal values, memory block (BP) 6 instantaneous signal values , a unit for transmitting 7 instantaneous values of a signal, a receiver 8 for service signals, blocks for allocating 9 speech signals and a unit for receiving 10 data. The goal is achieved by introducing drivers 4 and 11, BF 5, BP 6, transmission unit 7 and receiver 8, which are used to organize and eliminate voice channels in the channel switching mode and organize in the pauses of speech the general data transmission channel in the packet switching mode. 1 il.

Description

one . 1317680 The invention relates to electricity and can be used in electronic communication systems.

The purpose of the invention is to increase the speed of transmission.

The drawing shows a structural electrical circuit of the proposed device.

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The multichannel device for data transmission contains speech detectors 1, key elements 2 lamps, data reading unit 3, first control signal generator 4, instantaneous signal value generating unit 5, instantaneous signal value storage unit 6, instantaneous transmission unit 7 signal values, signaling receiver 8, speech extraction signal block 9, data receiving block 10, second control signal lid 11.

The device works as follows.

Speech detectors 1 are used to determine if a given speech channel is in an active or pause state. The signals from the outputs of the speech detectors 1 are fed to the inputs of the block 5 forming the instantaneous values of the signal, which code sequence type 01100., 10, where 1 means, for example, the speech channel is busy, and O is the pause state. Said code sequence is fed to the memory block 6, which stores the instantaneous values of the speech signals in the forward direction. From the outputs of the memory block 6, the corresponding information is fed to the inputs of the first driver 4 of the control signals and the block 7 of the transmission of instantaneous signal states. The first driver 4 of the control signals serves to detect channels that are free of voice signals and prevent data or speech transmission in accordance with the instantaneous values indicated. The permission signals for data transmission via the corresponding channels are received in block 3 of the data readout in the voice channels in the forward direction, which are compressed in all the free speech channels. From the output of block 7 of the transmission of instantaneous states of signals, the corresponding information is transmitted via a dedicated channel.

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to a similar device at the other end of the line. The same overhead information is sent to the receiver 8 overhead signals via a specially assigned reverse channel. From one output of the receiver 8 of the cursory signals, this information enters the block 7 of the transmission of instantaneous values of signals. In this way, information on the instantaneous values of the signals in the forward and reverse directions is transmitted simultaneously in both directions. From the first output of the overhead receiver 8, the information is fed to the input of the first shaper 4 control signals, which takes it into account when generating the enable or disable signals for the data reading unit 3 on the voice channels in the forward direction. From the third output of the overhead signal receiver 8, the information is fed to the second control signal generator 11, which controls the data receiving unit 10 from the reverse direction voice channels and the signal extracting units 9, From the output of the data receiving unit 10, the transmitted data is sent to the common reverse signaling channel directions. The outputs of the first driver 4 of the control signals are also connected to the inputs of the key elements 2 of the memory for recording and delaying the signals that are used by the voice information storage DP before the corresponding channel is switched to the speech mode. A separate service channel (not shown) is used to synchronize the operation of the device in the communication system.

The operation algorithm determining the func tioning of the described device when organizing and eliminating voice channels in the mode of switching channels and organizing in speech pauses a common data transfer channel in the mode of packet switching is as follows.

A 48 kilobit group path is used. Each voice channel is assigned a specific time interval. A total of 20 time channels are organized at a rate of 5 transmissions of 2.4 kbit / s. The group tract frame consists of 18 voice channels, the channel of the instantaneous state of the group path and the service channel. The latter is used for switching

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group path from adaptive switching mode to channel switching mode. When switching to the channel switching mode in case of deterioration of the fur environment, the 19th channel (instantaneous state channel) is used to transmit connection control signals and linear signals. The current state of the group path is transmitted on the 19th channel in the form of a bit sequence of the type 0110 ... 1, as previously indicated. This transmission is carried out at time intervals equal to At 2 (Nc + + Nnp), where N consists of the number the direct sequence of the state of the N path, or the reverse sequence number 1, or the reverse sequence number. - information about the condition of the path, where. H corresponds to the active state, and O corresponds to the pause; - the remainder of dividing the 16th degree generating polynomial. A time channel that is in the pause state is selected for data transmission only in the case of confirmation on the transmitting side. All temporary channels that are in a pause state are combined into a common channel, through which connection control signals and linear signals from the entire subscriber group served by the group path are transmitted.

By using such a solution in the group 48kbps path, 18 voice channels with a transmission speed of 2.4 kbit / s and a general high-speed data transmission channel with a variable speed of about 24-29 kbit / s can be organized.

Claims (1)

. Invention Formula A multi-channel data transmission device comprising a data reading unit, a data reception unit, and in each channel a speech signal selection unit, a speech detector, the input of which is connected to the information input of a key pah-mti element, in order to increase the transmission rate , the first and second control signal drivers, the instantaneous signal generation unit, VNISHSh Order 2437/56 Random polygons pr-tie, Uzhgorod, st. Project, 4 the instantaneous signal storage unit, the instantaneous signal transmission unit and the receiver-service signaling unit, the first output of which is connected to the first input of the first control signal generator, the first outputs of which are connected to the control inputs of the key memory elements of each channel, the outputs of which connected to the output of the data reading unit, the control input of which is connected to the second output of the first control signal generator, the third output of which is connected with the first input of the instantaneous value memory unit, the first output of which is connected to the first input of the instantaneous value transmission unit of the signal, the second input of which is connected to the second output of the service signal receiver, the third output of which is connected to the input of the second control signal generator, the first outputs of which are connected to the first inputs of the blocks of the speech signal of each channel, the second inputs of which are connected to the first input of the data receiving unit, the second input of which is connected to the second output second shaper controllers signals, the outputs of the speech detectors of each channel are connected to the corresponding inputs of the instantaneous signal generation unit, the output of which is connected to the second input of the instantaneous signal generation unit, the second output of which is connected to the second input of the first shaper control signals, with the inputs. speech detectors are speech inputs of a device whose information input is the information input of a data reading unit whose output is a group output of a device whose service input is an input of a service signal receiver, the first input of a data receiving unit is a group input of a device the service output of which is the output of the instantaneous signal transmission unit, the output of the data reception unit is the information ™ output of the device, the speech outputs of which are you moves the blocks of the speech signal. Circulation ,, 638 Subscription