KR100620490B1 - Apparatus of servicing data of voice communication system and method thereof - Google Patents

Abstract

The present invention provides data service using a voice communication method of a mobile terminal in a code division multiple access (CDMA) communication system. In particular, 168 bits or less (up to 21 bytes) in a maximum of 172 bits of a CDMA voice area are provided. The present invention relates to a data service apparatus and a method in a voice data communication system for driving a two-way application by making a call to a counterpart without using a complicated connection process by using a data area suitable for application characteristics among full and half bits.

According to the present invention, it is easy to implement a variety of voice services without the need for a separate server, provides a future-oriented algorithm by the selective use of a variety of applications, and if the type of vocoder is the same without a number restriction, the authentication process is required like DS The advantage is that it can be implemented without.

Voice Communications, Data Services, VDS Protocol Data, Applications, Vocoder

Description

Apparatus of servicing data of voice communication system and method

1 is a view showing a frame form of the present invention,

2 is a diagram showing a CDMA voice service implementation method of the present invention;

3 is an overall system configuration according to an embodiment of the present invention,

4 is a flowchart showing a transmission data processing procedure in a voice data communication system according to the present invention;

5 is a flowchart illustrating a receiving side data processing procedure in a voice data communication system according to the present invention.

    Explanation of symbols on the main parts of the drawings

100: transmitting mobile terminal 110: microphone

120: transmitter side vocoder 130: transmitter side VDS processing unit

140: transmitting side antenna 200: receiving side mobile terminal

210: receiving side antenna 220: receiving side VDS processing unit

230: receiving side application 240: receiving side vocoder

250: speaker 300: base station

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a code division multiple access (CDMA) communication system, and more particularly, to a data service apparatus and method in a voice data communication system for serving data using a voice communication method in a mobile terminal period.

The CDMA mobile communication system is a code division multiple access method, and has a kind of voice communication service and data communication service. Data communication services have changed a lot over the years, and are still changing. This is due to the characteristics of the network (A network, B network, C network, EVDO network ...) and the service type is completely different. In addition, equipment other than the base station (such as Internet equipment that interoperates with two-way applications) needs to be additionally installed, which is expensive and difficult to synchronize in time because it is difficult to process in real time.

On the other hand, voice communication service is simple in communication with little difference from the first CDMA service, and protocol does not change to semi-permanent characteristics. Therefore, even if the base station is changed or the terminal is changed, the Voice Data Service (VDS) does not change. As a result, application compatibility is increased, and there is an advantage that application service providers do not incur any additional costs other than initial capital.

Recently, there is a protocol (video telephone) that transmits voice information and data information at the same time by using a data protocol opposite to VDS. However, one of the main problems when transmitting audio information such as voice using a data protocol is the delay associated with frame retransmission using a public data protocol such as radio link protocol (RLP). Delays of hundreds of milliseconds or more in speech can result in unacceptable speech quality.

Accordingly, the present invention has been made to solve the above-described conventional problems, the object of the present invention is 168 bits or less (21 bytes or less) of the maximum 172 bits (Full Bit) of the CDMA voice region, Full Bit, The present invention provides a data service apparatus and method in a voice data communication system that uses a data area suitable for an application characteristic among half bits to make a phone call to a counterpart without using a complicated connection process such as a general data service.

It is another object of the present invention to provide a data service apparatus and method in a voice data communication system that provides a future-oriented algorithm by implementing various voice services more easily and selectively using various applications without requiring a separate server. .

Still another object of the present invention is to provide a data service apparatus and method in a voice data communication system that can be implemented without requiring an authentication process, such as DS, if the type of vocoder is the same without restriction on the number.

In order to achieve the above object, a data service apparatus in a voice data communication system according to the present invention is a device for serving data by using a voice communication method of a mobile terminal period in a CDMA communication system, the voice signal input to a transmitting mobile terminal. A transmitting side vocoder for compressing the speech to generate a maximum of 172 bits of speech data frame; A transmission side VDS processing unit for processing 168 bits of a maximum of 172 bits of voice data generated by the transmission side vocoder into a data area and replacing the VDS application data suitable for a specific type of data protocol; A transmitting antenna for transmitting the VDS protocol data replaced by the transmitting VDS processor to a base station; A receiving antenna for receiving VDS protocol data transmitted from the transmitting mobile terminal at a receiving mobile terminal through a base station; A receiving side VDS processing unit for extracting VDS data by comparing the VDS protocol data received by the receiving side antenna; And a receiving side application which preempts and uses the data extracted by the receiving side VDS processing unit.

The VDS data extracted by the receiving side VDS processing unit is dummy processed so as not to enter the receiving side vocoder, and is transmitted only to the receiving side application.

In addition, the data service method in the voice data communication system according to the present invention is a method of serving data using a voice communication method of a mobile terminal period in a CDMA communication system, comprising: transmitting a voice signal input to a transmitting mobile terminal to a transmitting vocoder; A frame generation step of generating a voice data frame having a maximum of 172 bits by compressing at a; A VDS replacement step of processing 168 bits of the maximum 172 bits of the generated voice data into a data area to remove all voice data from the vocoder on the transmission side, replacing the VDS protocol data with a special HEX value; A call signal discrimination step of determining whether a call signal is transmitted from the transmitting mobile terminal to a receiving mobile terminal; When a call signal is transmitted from the transmitting mobile terminal, the VDS protocol data transmitted from the transmitting mobile terminal is received by the receiving mobile terminal, the HDS values of the VDS protocol data are compared, and the VDS is classified and extracted. Extraction step; And an application driving step of dummyly processing the extracted VDS data so as not to enter the receiving side vocoder, and transferring the extracted VDS data only to the receiving side application to drive the application bidirectionally by preemptively using the VDS data in the receiving side application. It features.

The VDS special HEX value replaced in the VDS replacement step is used as a header value of synchronization in the transmitting mobile terminal, and the receiving mobile terminal compares the HEX values to distinguish VDS data, and the synchronization header is 21 bytes or less. It is composed of data frames, and synchronization may be transmitted or received one or more times depending on the importance or sensitivity of the application.

The VDS extraction step checks the VDS header of the transmitted data frame, and if there is an application ID, sends a synchronization OK message.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a method for transmitting and receiving data using a voice communication method between mobile terminals in a code division multiple access (CDMA) communication system according to IS (Interim Standard) -95, IS-95A, IS-95B, and IS-95C standards. present.

FIG. 1 illustrates a frame form in which a first bidirectional voice signal flows, that is, a continuously flowing voice signal, is converted into information to be used by an application, and the voice signals are frame packets having a length of 20 ms per one frame. The frame packet of the channel transmitted from the 100 to the base station 300 has a maximum size of 172 bits (full bit). Of the 172 bits, four bits representing a frame attribute are used as system bits representing frame configuration information in the CDMA conversation state, and thus cannot be used as data areas. Only the remaining 168 bits, that is, up to 21 bytes, are used as data areas.

The data stream represents the output of a vocoder, shown as a series of sequential vocoder frames, each vocoder frame having a frame length of 20 ms. Other vocoders may produce vocoder frames with frame lengths of larger or smaller durations.

This means that if you float upstream, you will receive the boat downstream. Anyway, the voice signal will continue to flow every 20 ms, and it will replace the voice data with the data to be sent by the application.

2 illustrates an implementation method of a CDMA voice service, in which a transmitting (TX) mobile terminal 100 deletes compressed voice data from the vocoder 120 which is the last step of the CDMA voice service, and voice data service. ) To the base station 300 through the transmitting antenna 140 to replace the protocol data.

The receiving side (RX) mobile terminal 200 receives the VDS protocol data transmitted from the transmitting side (TX) mobile terminal 100 from the base station 300 through the receiving side antenna 210 and extracts the data. The pre-empted data is used by the receiving side application 230, and the dummy data is prevented from entering the receiving side vocoder 240 to prevent noise of the speaker 250.

In this case, since the base station 300 recognizes the voice area, it is possible to communicate if the terminal contains the same VDS service without requiring a separate service, and the terminal and the general telephone (for home use) can communicate but are recognized as noise. none.

3 is an overall system configuration according to an embodiment of the present invention, the present invention is largely the transmission side (TX) mobile terminal 100 and the receiving side (RX) mobile terminal 200 for transmitting and receiving voice or data communication It is configured, and between the transmitting side (TX) mobile terminal 100 and the receiving side (RX) mobile terminal 200 is present in each cell of the mobile communication network to receive the signal transmitted from the mobile terminal (100,200) and transmit it to the mobile communication exchange. And, the base station 300 which serves to transmit a signal to be received to the mobile terminal (100,200) is installed.

The transmitting and receiving mobile terminal (100,200) is preferably provided with a decoding means to decode the service provided by the present invention in the terminal (100,200). The decoding means may be implemented in software, such as a decoding program, or may include separate decoding hardware.

Each base station 300 advantageously includes one or more sectors, each sector comprising an antenna radially away from the base station 300 and directed in a particular direction. The intersection of sectors and frequency assignments may be called a CDMA channel.

Referring to FIG. 3, a voice signal called voice data in a code division multiple access (CDMA) system is input to a transmitting side (TX) mobile terminal 100 through a microphone 110 (hereinafter referred to as a microphone). The microphone 110 converts an acoustic signal into an electrical signal for processing in the analog-to-digital converter A / D, and the A / D uses known techniques to convert the analog electrical signal into a digital signal from the microphone 110. For example, A / D performs low pass filtering, sampling, quantization, and binary encoding on analog voice signals from microphone 110 to generate digitized voice signals.

Then, the digitized voice signal is transmitted to the transmitting side vocoder 120. Vocoder 120 is a self-contained device that compresses a digitized voice signal to minimize the band required for transmission. Vocoder 120 generates successive vocoder frames, known as data frames, at regular time intervals of every 20 ms, although other time intervals may be used. Therefore, the length of each data frame is 20 ms.

In typical voice communications, not all 168 bits are in the voice domain. For example, in the case of Half Bit, half is used as the voice area and half as the signal area. Therefore, if application data enters the signal area, the call may be disconnected.

The vocoder frame from the vocoder 120 is transmitted to the transmitting VDS processing unit 130, and the data (application data) suitable for a specific type of data protocol used for wireless transmission in the VDS processing unit 130, which is the core technology of the present invention. ) Is replaced by a packet. For example, in this embodiment, all compressed voice data from the transmitting side vocoder 120, which is the last step of the CDMA voice service, is erased and replaced with VDS protocol data (special HEX value). This is used as a header value of synchronization, and the receiving terminal (RX) mobile terminal 200 compares the HEX values to distinguish the VDS data.

The VDS protocol data replaced by the transmitting side VDS processing unit 130 of the transmitting side (TX) mobile terminal 100 is transmitted to the base station 300 through the transmitting side (TX) antenna 140.

The VDS protocol data transmitted from the TX mobile terminal 100 is received by the RX mobile terminal 200 through the RX antenna 210, and the received VDS protocol data is received. The receiver RX is transmitted to the receiver VDS processor 220 of the mobile terminal 200.

The VDS processing unit 220 of the receiving terminal (RX) mobile terminal 200 extracts VDS data by comparing VDS protocol data replaced with a special HEX value, and uses the extracted data in the application 230 (game, chat .. Preemption at.) Is used. At this time, the VDS data is dummy so as not to enter the receiving side vocoder 240 to prevent noise of the speaker 250.

Meanwhile, in the exemplary embodiment of the present invention, components of each of the mobile terminals 100 and 200 are distinguished in order to easily explain the data processing process in the transmitting (TX) mobile terminal 100 and the receiving (RX) mobile terminal 200. Although described differently, the transmission and reception side mobile terminals 100 and 200 have the same components so that the transmission and reception side data processing may be reversed.

Hereinafter, the operational effects of the data service apparatus and method in the voice data communication system configured as described above will be described.

FIG. 4 is a flowchart showing a transmission-side data processing procedure in the voice data communication system according to the present invention. In FIG. 4, S denotes a step.

First, before switching to the VDS mode in the transmitting side mobile terminal 100, parameters necessary for synchronization or data area and the like used in the transmitting side application are initialized, and the bit set of the transmitting side vocoder 120 is converted into characteristics of the application. In this case, a full bit (172 bits) can be forcibly created and used.

Afterwards, it moves to the synchronization area, and the header of the synchronization consists of a VDS header (8 bytes) + application ID (AppID; 4 bytes) + application extension data (AppExt; 9 bytes) as shown below. do.

The following example shows a case where the synchronization frame is full bit and the size of the three pieces of information can be changed and used. In the example below, the type of application may have the number of sufficient cases, such as 2 times 104 times.

Synchronization may be sent one or more times as described above according to the characteristics of the application. This is to reduce the error rate because no error control (basic CRC is for error detection). However, in dataization, user error control may be possible in an application.

After that, the process proceeds to the synchronization area and erases all voice data from the transmitting side vocoder 120 and replaces the VDS protocol data (special HEX value). This is used as a header value for synchronization, and the receiving side compares these HEX values to distinguish VDS data. (The values are 0x55, 0x55, 0x56, 0x56, 0x57, 0x57 according to the operator's request, application characteristics and vocoder characteristics. , 0x58, 0x58, etc. However, if a header is specified and used, care must be taken when changing it for compatibility, and it must have a structure distinct from when the header is a normal voice signal.)

When the synchronization request packet is transmitted (S20), the synchronization is continued for a limited time (20 ms) until there is a VDS and an application in the receiving mobile terminal 200, and the synchronization format is described as described above. It can be changed to 0x55, 0x55, 0x56, 0x56, 0x57, 0x57, 0x58, 0x58, etc. according to the characteristics and vocoder characteristics. However, if the header is fixed and used, care must be taken when changing it for compatibility. In addition, the header must have a structure distinct from that of a general voice signal (S30, S31).

If synchronization is successful, there are no headers in the data area. Of course, the application may manage headers separately, but the algorithm itself has no headers and uses the entire maximum (21 bytes) as data, and sends the frame one or more times as in synchronization. In addition, it may be retransmitted according to the characteristics of the application and the reception sensitivity. (S40 ~ S60)

When the application is terminated (S70) can be switched to call termination or synchronization again, (S80) at the end of the call can not be switched to synchronization and the system is forcibly terminated. (S90)

FIG. 5 is a flowchart illustrating a receiving side data processing procedure in the voice data communication system according to the present invention. In FIG. 5, S denotes a step.

First, the receiving mobile terminal 200 checks the VDS header (S200), if there is no VDS header, (N0) implements the existing voice service method, and (S290) if there is a VDS header, (YES) the application ID. Finding the corresponding receiving side application 230 based on (S210).

If there is a receiving application 230 (YES), and sends a synchronization OK message to the transmitting mobile terminal 100 to switch to initialization, the message format is the same as the received data (S220).

If there is no receiving application 230 (NO), a synchronization failure message (Fail Message) is sent to the transmitting mobile terminal 100 and the dummy frame is processed. (S300, S310) The message failure format is described below. This may vary depending on the operator, the characteristics of the application, and the sensitivity of the application.

Thereafter, before going to the initialization area and switching to the VDS mode, parameters necessary for synchronization or data area are initialized and parameters used by the receiving side application 230, and a bit set of the receiving side vocoder 240 is forced as necessary. It can be used to make a full bit (172 bits) (S230).

If the VDS protocol data received by the receiving mobile terminal 200 is new VDS data (YES), the VDS data is stored in the RAM and notified to the application. (S240 to S260)

If the frame is already received and is not new VDS data (N0), the frame is dummy processed (S240, S310).

When the receiving application 230 is terminated (S260), the call can be terminated or switched back to data (S270). When the call is terminated, it cannot be converted to data and the system is forcibly terminated (S280).

As described above, the embodiment of the present invention is to apply only the VDS algorithm to the mobile terminal (100,200) itself in a simple voice service structure, because the nature of the voice does not retransmit for the error frame, but in the case of VDS is not consumable voice data Retransmission is possible.

In other words, the voice is extinguished as soon as it is spoken and must be processed in time. However, the VDS data can be retransmitted because the data requested or sent by the application 230 is stored in the RAM.

In addition, since the VDS does not provide a retransmission algorithm, a service must be implemented according to characteristics of the application 230.

As described above, the mobile terminal 100,200 performing the data service process initially reads data stored in the memory and initializes the system when it is powered on.

Thereafter, the data is initialized to obtain a system, and the location of the mobile terminals 100 and 200 is registered through authentication with the base station 300.

Waiting until the call is received or another service request is received, the VDS determines whether to use the service when the initial data is initialized. When used, the service is started by checking the initial VDS header in the traffic (in a busy state).

According to the data service apparatus and method in the voice data communication system according to the present invention as described above, 168 bits or less (21 bytes or less) in the maximum 172 bits (full bit) of the CDMA voice area, and Full Bit, Half depending on the characteristics Using the data area that fits the characteristics of the application among the bits, there is an effect that the application can be operated in both directions by calling the other party without complicated connection process such as general data service.

In addition, the present invention provides a future-oriented algorithm to implement a variety of voice services more easily without the need for a separate server, and can be selectively used in a variety of applications, and if the type of vocoder is the same without a number, the authentication process is required like DS. The effect is that it can be implemented without.

In addition, the present invention communication between machines equipped with a CDMA module, such as a mobile game of an application such as bidirectional, a system for transmitting a real-time machine failure or monitor contents of a critical facility or a system for remotely controlling home machines or home appliances However, it can be used for a small amount of file transfer service. In addition, with the development of mobile communication hardware technology, multimedia processing such as 3D games is possible, which makes it easier to implement various applications for VDS and emerge of service companies.

What has been described above is only one embodiment for implementing a data service apparatus and method in a voice data communication system according to the present invention, and the present invention is not limited to the above-described embodiment, but within the technical idea of the present invention. Of course, various modifications are possible by one of ordinary skill in the art.

Claims (6)

An apparatus for serving data using a voice communication method of a mobile terminal period in a CDMA communication system, A transmitting vocoder for compressing a voice signal input to the transmitting mobile terminal to generate a voice data frame having a maximum of 172 bits; A transmission side VDS processing unit for processing 168 bits of a maximum of 172 bits of voice data generated by the transmission side vocoder into a data area and replacing the VDS application data suitable for a specific type of data protocol; A transmitting antenna for transmitting the VDS protocol data replaced by the transmitting VDS processor to a base station; A receiving antenna for receiving VDS protocol data transmitted from the transmitting mobile terminal at a receiving mobile terminal through a base station; A receiving side VDS processing unit for extracting VDS data by comparing the VDS protocol data received by the receiving side antenna; And And a receiving side application which preempts and uses the data extracted by the receiving side VDS processing unit. The method of claim 1, The VDS data extracted by the receiving side VDS processing unit is dummy processed so as not to enter the receiving side vocoder, and is transmitted only to the receiving side application. A method of serving data using a voice communication method of a mobile terminal period in a CDMA communication system, A frame generation step of compressing a voice signal input to a transmitting mobile terminal by a transmitting vocoder to generate a maximum of 172 bits of voice data frame; A VDS replacement step of processing 168 bits of the maximum 172 bits of the generated voice data into a data area to remove all voice data from the vocoder on the transmission side, replacing the VDS protocol data with a special HEX value; A call signal discrimination step of determining whether a call signal is transmitted from the transmitting mobile terminal to a receiving mobile terminal; When a call signal is transmitted from the transmitting mobile terminal, the VDS protocol data transmitted from the transmitting mobile terminal is received by the receiving mobile terminal, the HDS values of the VDS protocol data are compared, and the VDS is classified and extracted. Extraction step; And The extracted VDS data is dummy processed so as not to enter the receiving side vocoder, and is transferred only to the receiving side application to preempt and use the VDS data in the receiving side application to drive the application in both directions. Data service method in a voice data communication system comprising a. The method of claim 3, wherein In the voice data communication system, the VDS special HEX value replaced in the VDS replacement step is used as a header value of synchronization in the transmitting mobile terminal, and the receiving mobile terminal compares the HEX values to distinguish the VDS data. Data service method. The method of claim 4, wherein The header of the synchronization is a data frame of up to 21 bytes, the synchronization is a data service method in the voice data communication system, characterized in that the frame is sent one or more times. The method of claim 3, wherein The VDS extraction step checks the VDS header of the transmitted data frame and sends a synchronization OK message if there is an application ID, and if there is no application ID, sends a synchronization failure message and dummyly processes the frame. Data service method in system.

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