KR0136394B1 - Channel switching - Google Patents

Abstract

The present invention relates to a method for forming a voice service data transmission path in a voice service system, and receives a plurality of trunk lines connected to a public communication network in a one-to-one manner to quantize and output data inputted through trunk lines, and to input quantized data. If a plurality of PCM conversion means for decoding and applying to the trunk line, and the PCM converter means the data quantized and output from a PCM converter having the same synchronization, the data is compressed and output, and the compressed data is input A plurality of PCM data compression and decompression means for decompressing and applying the data to a corresponding PCM converter, and the PCM conversion means are given specific synchronization periods, and the PCM data compression and decompression means are given a variable synchronization period, thereby providing a synchronization period. PCM conversion means and PCM data pressure And a channel value variable stage for varying a data transmission path to enable data transmission and reception between the expansion means. It is possible to switch the channel and solve the problem of increasing the load of the system.

Description

Channel switching method and apparatus for forming data transmission path

1 is a simplified configuration diagram illustrating a voice service data transmission path in a conventional voice service system.

2 is a simplified block diagram for explaining a conventional voice service data transmission path different from that of FIG.

3 is a simplified block diagram for explaining a voice service data transmission line formation method according to the present invention

FIG. 4 is a schematic diagram for explaining the operation of the channel variable part in FIG.

5 is an exemplary waveform diagram illustrating the operation of FIG.

* Description of the symbols for the main parts of the drawings *

N1,… N32: telephone P1,... P32: PCM Converter

A1,… , A32: ADPCM converter 10, A, B: data processing unit

20, A, B: Data storage section 30: Switching section

40: channel variable control unit 41: channel variable control unit

42: latch 43: channel variable signal generator

The present invention relates to a method for forming a voice service data transmission path in a voice service system, and in particular, a switching method for forming a voice service data transmission path corresponding to each data input / output device by varying a channel for data transmission and reception. Relates to a device.

In general, voice service systems, such as the Audio Responce System (hereinafter referred to as ARS) or Voice Mail System (hereinafter referred to as VMS), which are commonly known by the general public, are unspecified. It refers to a system provided with a voice data service in the form of sharing data in memory used by an arbitrary institution (or a specific person).

Looking at the conventional voice service system as described above with reference to the accompanying drawings as follows.

FIG. 1 is a simplified configuration diagram for explaining a conventional voice service system. The configuration and operation thereof are briefly described as follows.

A number of trunk lines connected to the public telecommunication network (shown by phone for easy explanation) are applied one-to-one to quantize and output the data input through the trunk line, and decode and apply the quantized data to the trunk line. It is connected to a plurality of PCM converter (P1, ..., P32) and the PCM converter (P1, ..., P32) in one-to-one, and the data is compressed and output and compressed by receiving the data quantized and output from the PCM converter When the data is inputted, the data storage unit 20 according to the ADPCM converters (A1, ..., A32) for decompressing the compressed data and applying it to the corresponding PCM converter, and the data applied from the ADPCM converters (A1, ..., A32). ) And any telephones (N1, ..., N32) connected to the public telecommunications network while operating as a data processing unit (10) for accessing the corresponding ADPCM converter. The data required is available from the transfer to the phone.

However, such a system structure is a type in which a plurality of data input / output units are connected to a single data processing unit, so that the number of data processing units is constant and is suitable for a small system having a small number of data input / output units, but includes various data processing units. There was a problem that is difficult to provide.

The conventional method for solving the above problems, as shown in Figure 2, the switching unit 30 between the PCM converter (P1, ..., P32) and ADPCM converter (A1, ..., A32) A system controller (not shown) that temporarily stores data applied by the PCM converters P1, ..., P32 or data applied by the ADPCM converters A1, ..., A32, and is stored therein. Depending on the signal, apply it to the corresponding PCM or ADPCM converter.

However, in the system to which the above complementary method is applied, the PCM or ADPCM converters connected to the switching unit 30 always have a time delay in data transmission because the synchronization time is determined, and the load of the system even in the case of a relatively simple service. There was a problem that increases.

SUMMARY OF THE INVENTION An object of the present invention for solving the problems of the conventional method is a switching method for forming a voice service data transmission path that is operable to reduce the load on the system and to connect each data transmission channel if necessary, and To provide a device.

A feature of the present invention for achieving the above object is a plurality of data storage means for storing data of different fields and data for accessing the data of the data storage means assigned to itself of the plurality of data storage means A channel switching method for forming a data transmission path in a voice service system having a processing means, the method comprising: a first step of receiving data applied from a public communication network according to a specific synchronization period in a plurality of quantization and decoding means; And a second step of determining whether to request a data transmission path change from the data applied in the first step, and the quantization and decoding means and the data processing means when determining that the data transmission path change request is made in the second step. Synchronization section of multiple data transmission means connecting The third step of varying and the data transmission means having a variable synchronization period in the third step includes a fourth step of transmitting and receiving data through the same quantization and decoding means having the same synchronization period.

Another feature of the present invention for achieving the above object is to access the data of a plurality of data storage means for storing data of different fields and data storage means assigned to itself of the plurality of data storage means. In the channel switching politics for data transmission path formation in a voice service system having data processing means, a plurality of trunk lines connected to a public communication network are applied one-to-one to quantize, output, and quantize data input through trunk lines. When the data is input, a plurality of PCM conversion means for decoding and applying to the trunk line, and the data is compressed and output by receiving the data quantized and output from any PCM converter having the same synchronization among the PCM conversion means, and the compressed data is input. When the compressed data is decompressed PCM converter means for applying a plurality of PCM data compression and decompression means for the PCM converter and the PCM conversion means, respectively, and a variable synchronization period for the PCM data compression and decompression means, so that the synchronization period is matched. And a variable channel number for varying the data transmission path to enable data transmission and reception between the PCM data compression and decompression means.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

3 is a simplified configuration diagram illustrating a voice service system according to the present invention, and includes first and second data storage units 20A and B storing different data, and a plurality of trunk lines connected to a public communication network. A plurality of PCM converters (P1, ..., which are illustrated in the drawing for easy explanation) are quantized and outputted through the CO line and decoded when the quantized data is input. P32) and a plurality of ADPCM converters that receive data quantized and output from a PCM converter having the same synchronization, compress and output the data, and expand the compressed data when the compressed data is input. A1, ..., A32 and the first and second data storage units 20A, B themselves according to the data applied from the ADPCM converters A1, ..., A32. The first and second data processing units 10A and B and the PCM converter which access the allocated data storage unit and apply them to the corresponding ADPCM converter are given a specific synchronization period, and the ADPCM converter is given a variable synchronization period to synchronize. It is composed of a channel variable section 40 for varying the data transmission path to enable data transmission and reception between the PCM converter and the ADPCM converter meeting the period.

Referring to Figure 4 attached to the configuration of the channel variable part of the voice service system according to the present invention configured as described above are as follows.

4 is a partial configuration diagram for explaining the operation of the channel variable section, and the channel variable control section 41 for generating a control signal by determining how much the synchronous period applied to the ADPCM converter. The latch 42 which receives the control signal output from the channel variable control part 41 and classifies it into 5 bits and outputs it, and receives five clocks CK1,..., CK5 having different frequencies from the latch 42. The channel variable signal generator 43 combines and outputs the five clocks CK1, ..., CK5 according to a control signal classified into 5 bits.

Hereinafter, an exemplary operation of the voice service system according to the present invention as shown in FIG. 3 and FIG. 4 will be described with reference to FIG.

The synchronization time of the PCM converter and the ADPCM converters in the initial stage of the voice service system according to the present invention is the same as the first PCM converter P1 and the first ADPCM converter A1, and the second PCM converter P2 and the second ADPCM converter A2 In the same way, all PCM converters and ADPCM converters have the same synchronization time one-to-one.

In this case, when a signal that is desired to be provided through another ADPCM converter is applied without receiving data through the ADPCM converter which is currently synchronized with the PCM converter, the channel variable control unit 41 responds thereto. To generate a control signal. The control signal output from the channel variable control unit 41 is a change control value of a data transmission channel currently held. The control value is, for example, in the latch 42 which receives the control value and classifies it into 5 bits. 4 lines 00100 are converted and output.

The channel variable signal generator 43 receiving the output signal of the latch 42 receives five clocks CK1,..., CK5 and receives five clocks CK1,... According to the output signal of the latch 42. , CK5), where the first clock CK1 is 254 KHz (see also the fifth a), the second clock CK2 is 128 KHz (see also the fifth b), and the third clock CK3. Is 64 KHz (see also 5c), 4th clock (CK4) is 32KHz (see also 5d), and 5th clock (CK5) is 16KHz (see also e). The clock changes every 8KHz.

If the control signal output from the channel variable control unit 41, that is, the change control value of the data transmission channel is 4 as in the above example, the channel variable synchronization signal T1 output from the channel variable signal generator 43 Is output as shown in FIG. 5 g and the output signal as shown in FIG. 5 g is applied to the first ADPCM converter A1 to be delayed from the original synchronous time (see FIG. 5 f), and the first ADPCM converter A1. Second, third,.. The operation time of the 32 ADPCM converter is delayed.

Therefore, when looking at the overall operation of the voice service system according to the present invention, the PCM converter (P1, ..., P32) is always a constant synchronization time, and the ADPCM converter (A1, ..., A32) are respectively the channel variable part 40 The synchronization signal is varied according to the variable synchronization signal applied from the data transmission process, and the ADPCM converters A1, ..., A32 each have the same synchronization as the corresponding variable synchronization signal applied from the channel variable unit 40. FIG. The PCM converter receives the data quantized and output from the PCM converter, compresses the data, applies the compressed data to the data processing unit connected to itself, and expands the data received from the data processing unit to synchronize with itself. To apply.

The PCM converters (P1, ..., P32) are each a plurality of trunk lines connected to the public communication network in accordance with the corresponding fixed synchronization signal applied from the channel variable unit 40 (illustrated in the drawings for the sake of ease of explanation). ) Is applied one-to-one and quantizes the data input along the trunk line and applies it to the ADPCM converter having the same synchronization signal as its own synchronization, and decodes the quantized data input from the ADPCM converter whose synchronization is identical to that of the trunk line. By activating, the data required from any of the switchers N1, ..., N32 connected to the public telecommunication network can be transmitted to the corresponding telephone.

By providing a switching scheme for forming a data transmission path in the voice service system operating as described above, it is possible to switch the data transmission channel to change the channel for data transmission when necessary, and increase the load of the system. It is effective to solve.

In the above-described embodiment, since only 32 trunk lines are connected to the system, only a clock of 2 ⁴ KHz to 2 ⁸ KHz is used, but the present invention is not limited to the above embodiment. In addition, many modifications and applications are expected to be possible to those skilled in the art, but such modifications and applications are intended to be within the scope of the following claims.

Claims (3)

Data in a voice service system having a plurality of data storage means for storing data of different fields, and a data processing means for accessing data of the data storage means assigned to itself among the plurality of data storage means. In the channel switching method for forming a transmission path, A first step of receiving data applied from a public communication network in a plurality of quantization and decoding means respectively according to a specific synchronization period; A second step of determining whether to change the data transmission path from the data applied in the first step; A third step of varying synchronization intervals of a plurality of data transfer means connecting the quantization and decoding means and the data processing means when it is determined that there is a request to change the data transfer path in the second step; And And a fourth step of transmitting and receiving data through the quantization and decoding means having the same synchronization interval as the self-transmission interval in the third step. Data in a voice service system having a plurality of data storage means for storing data of different fields, and a data processing means for accessing data of the data storage means assigned to itself among the plurality of data storage means. In the channel switching device for forming a transmission path, A plurality of PCM conversion means for receiving a plurality of trunk lines connected to a public communication network in a one-to-one manner, quantizing and outputting data input through the trunk line, and decoding and applying the quantized data to the trunk line; Among the PCM converting means, a plurality of PCMs are applied to a PCM converter having the same synchronous quantized and output data and compressing the data and outputting the compressed data. Data compression and decompression means; And The PCM conversion means is given a specific synchronization period, and the PCM data compression and decompression means are given variable synchronization periods so that data can be transmitted and received between the PCM conversion means and the PCM data compression and decompression means that match the synchronization period. A channel switching device for forming a data transmission path, characterized in that the variable channel comprises a variable stage. The method of claim 2, The channel variable stage includes channel variable control means for determining how much the synchronization period applied to the PCM data compression and decompression means is to generate a control signal; A latch receiving a control signal output from the channel variable control means and classifying the control signal into predetermined bits and outputting the predetermined bit; And Forming a data transmission path characterized in that the channel variable signal generating means for receiving a predetermined number of clock signals having different frequencies and combines and outputs the clock signal in accordance with a control signal that is classified and output as a predetermined bit in the latch Channel switching device.