KR100650689B1 - Mobile communication terminal having a dtx function and controlling method therefore - Google Patents

Abstract

A mobile communication terminal having a DTX(Discontinuous Transmission) function and a control method therefor are provided to minimize a call current consumed in the terminal through the DTX function and to optimize a remaining time of a battery by composing a detecting device of a transmitting signal in the terminal and controlling the driving of a transmitting device according to whether a transmitting signal of a user exists. A wireless module unit(6), composed in a mobile communication terminal(1), includes a transmitting terminal(4) and a receiving terminal(5). The transmitting terminal(4) transmits a transmitting signal. The receiving terminal(5) receives an external receiving signal. A switch(7) blocks a transmission path of the transmitting terminal(4) of the wireless module unit(6) or a reception path of the receiving terminal(5). A VAD(Voice Activity Detector)(8) connects to a phone transmitting terminal and a phone receiving terminal of a transmission/reception phone, detects the strength of a voice signal of a user inputted to the phone transmitting terminal or the strength of a receiving signal outputted to the phone receiving terminal, and outputs the detected signal. A main control unit(9) compares the detection signal of the phone transmitting terminal or the phone receiving terminal detected by the VAD(8) with a threshold value, obtains the compared result, controls the switch(7) by the obtained result signal, and turns off the driving of the transmitting terminal(4) and the receiving terminal(5).

Description

Mobile communication terminal having a DTX function and its control method

1 is an explanatory diagram illustrating a conventional mobile communication terminal.

2 is an explanatory diagram illustrating a mobile communication terminal equipped with a DTIX function of the present invention.

3 is a flowchart of the present invention.

4 is an explanatory diagram illustrating an example of a received signal of a GSM terminal according to one embodiment of the present invention;

<Detailed Description of Codes>

1: mobile communication terminal 2: handset phone

3: codec section 4: transmitting end

5: receiving end 6: wireless module

7: selector switch 8: VAD

9: Main control unit 10: Memory unit

11: display 12: key panel portion

13: base station system unit 14: terminal

The present invention relates to a mobile communication terminal equipped with a D-X function and a control method thereof. In particular, the D-X function for controlling the driving of the transmission means according to the presence or absence of the user's transmission signal is provided by the terminal having a transmission signal detection means. The present invention relates to a mobile communication terminal provided and a control method thereof.

In general, a mobile communication terminal uses a Global System for Mobile Communication (GSM) method and a CDMA method. First, the GSM service was established by the European Telecommunication Standards Association (ETSI) as a pan-European standard in 1989. It uses narrowband time division multiple access (TDMA) to group 17 European countries into a single currency. In addition, since the GSM service is connected to an ISDN, a mobile data service can be directly connected to a telephone terminal, a facsimile, a laptop computer, a teletext terminal, or the like without using a modem. 960MHz, the base station reception frequency is 890∼915MHz, so the transmission and reception frequency interval is 45MHz. Accordingly, the digital cellular system standardized by the ETSI is called GSM, which stands for 'Global System for Mobile telecommunication'. On the other hand, the code division multiple access (CDMA) is a digital mobile communication method employing spread-band technology developed by Qualcomm of the United States, also referred to as code division multiple access or code division multiple access. Since CDMA transmits and receives signals while sharing time and frequency, CDMA has more than 10 times the capacity and excellent call quality compared to the existing analog method (AMPS), and the multiple access method using spread-spectrum technology. One kind. In this case, the spread spectrum communication is a method of spreading and spreading a signal with a bandwidth wider than a bandwidth of a signal to be transmitted.

Then, referring to the conventional mobile communication system as described above with reference to FIG. 1, a terminal 70 for transmitting / receiving a radio signal in a set communication method, for example, a GSM method, and a function signal transmitted from the terminal 70, for example, a call. And a base station 71 for wirelessly processing a signal or SMS message, and an MSC 72 for controlling a transmission function of a call signal or SMS message input via the base station 71.

On the other hand, referring to the operation of the conventional mobile communication system as described above, first, when the user of the terminal 70 opens the folder 73 and presses the telephone number signal through the keypad 74, the telephone number signal is the LCD panel ( At the same time as displayed on the (75) and the radio signal processing by the terminal 70 is transmitted to the base station (71). The base station 71 transmits the call signal of the input terminal 70 to the MSC 72. Then, the MSC 72 analyzes the input call signal data to recognize the destination telephone number and transmits the call signal to the base station (not shown) of the corresponding destination. Therefore, the destination base station relays the transmitted call signal and connects the call to the counterpart terminal 76. At this time, when the call is formed by the above process, the terminal 70 executes a normal call with the counterpart terminal 76.

During this process, the base station 71 discontinuously transmits the DTX (Turn Off) to the terminal 70 when the transmission signal is not received from the terminal 70 to which the call channel is currently assigned or when there is no signal to be transmitted. transmission) transmits a control signal. Accordingly, the terminal 70 receiving the DTX control signal from the base station 71 as described above minimizes the consumption of the call current by turning off the receiver or the transmitter according to the base station DTX control signal.

However, the conventional mobile communication terminal as described above does not have a means for minimizing the current consumption by actively turning off the internal transmitter or receiver according to the signal transmitted and received inside the terminal, thereby significantly reducing the functionality of the terminal. Even if there is a base station DTX control function, there is a problem that the terminal does not use the DTX function at all unless the adjacent base station transmits the DTX control signal.

Accordingly, the present invention has been invented to solve the above-mentioned problems, and the terminal is provided with a detection means for detecting the transmission signal to control the driving of the transmission means according to the presence or absence of the user's transmission signal. The purpose of the present invention is to provide a mobile communication terminal having a DTIX function and a method of controlling the same, which minimizes the call current consumed in the battery and thus maximizes the remaining time of the battery.

Another object of the present invention is to provide a detection means on the speaker side of the terminal to detect the presence or absence of a received signal from the outside and to precisely control the driving of the receiving means according to the result, the terminal actively judges the received current The present invention provides a mobile communication terminal having a DTIX function and a method of controlling the same, which minimizes the consumption and thus significantly improves the functionality of the terminal.

The present invention for achieving the above object in the mobile communication terminal equipped with a handset, a mobile module including a receiving terminal provided in the mobile communication terminal for transmitting a transmission signal and receiving the external receiving signal And a switching switch that blocks the transmission path of the transmitting end of the wireless module unit or the receiving path of the receiving end, and is connected to each of the handset and the handset of the handset, and is emitted as a voice signal or a handset of the user flowing into the handset. The VAD for detecting and outputting the strength of the received signal and the detection signal of the talk end or the receiver end detected by the VAD are compared with a set threshold and the result is calculated, and the switch is controlled according to the calculated result signal. Provided is a mobile communication terminal having a DTIX function including a main control unit for turning off the driving of a receiving end.

Another feature of the present invention is a VAD detection confirmation step of confirming whether there is a transmission signal flowing into the mobile communication terminal compared with a set threshold signal, and the transmission signal (D) flowing into the terminal as a result of checking during the VAD detection confirmation step is If it is greater than the set threshold signal (R), the normal transmission signal processing step of performing a normal transmission function by supplying a normal talk current to the transmitting terminal of the terminal and the transmission signal (D) flowing into the terminal as a result of checking during the VAD detection confirmation step Control of the mobile communication terminal with a D-X function consisting of a transmission path blocking step of blocking the call current supplied to the transmitting terminal through the switching switch of the terminal when it is determined that there is no voice signal transmitted when it is smaller than the set threshold signal (R) Provide a method.

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

The present invention is installed on the body of the mobile communication terminal 1 as shown in Figure 2 to convert the analog voice signal input through the handset 2 to a digital signal or to convert the digital voice signal into an analog signal A wireless module unit 6 including a codec unit 3 for outputting, a transmitter 4 provided in the mobile communication terminal 1 for transmitting a transmission signal, and a receiver 5 for receiving an external reception signal; A switching switch 7 for interrupting the transmission path of the transmitting end 4 of the radio module unit 6 or the receiving path of the receiving end 5, and connected to each of the handset and the handset of the handset 2; Voice activity detector (VAD) 8 for detecting and outputting the intensity of a user's voice signal or the received signal emitted to the receiver, and the detection signal of the receiver or receiver being detected by the VAD 8 Is compared to the set threshold and the result The main controller 9 controls the switching switch 7 according to the calculated result signal to turn off the driving of the transmitter 4 and the receiver 5 and to control the functions of the mobile communication terminal 1 as a whole. And a memory unit 10 for storing various types of information processed by the mobile communication terminal 1 and various display signals processed by the mobile communication terminal 1 according to the display control signal of the main control unit 9. And a display 11 for displaying.

One end of the main control unit 6 is connected to a key panel unit 12 for inputting a function setting signal of the user to the main control unit 6.

Next, a control method applied to the above apparatus will be described.

As shown in FIG. 3, the method of the present invention proceeds from the initial state S1 to the call mode setting checking step S2 to check whether the call function is set in the terminal. At this time, if the call function is not set in the terminal as a result of checking during the call mode setting confirmation step (S2), the current step ends and proceeds to the standby state.

However, if the call function is set in the terminal as a result of the check during the call mode setting confirmation step (S2), the process proceeds to the call function execution step (S3) to execute the set transmission and reception call functions.

For example, when power is applied to the mobile communication terminal 1 of the present invention, the main control unit 9 of the mobile communication terminal 1 proceeds to an initialization state to form necessary information from the internal memory unit 10 to perform an initialization process. Run it and proceed to standby.

At this time, the main control unit 9 of the terminal 1 recognizes when the user inputs a phone number through the key panel unit 12 and presses a call button, and the user inputs the phone number to the memory unit 10. In addition to the storage, the system accesses the base station system unit 13 using the access channel through the transmitting end 4 of the radio module unit 6, and then transmits an outgoing signal to the corresponding telephone number. Here, the main control unit 9 normally connects the transmission / reception path with the internal circuit so that the transmission terminal 4 and the reception terminal 5 of the wireless module unit 6 are normally driven through the switching switch 7 during the initial driving. Therefore, normal communication current flows to the transmitting end 4 and the receiving end 5 of the radio module unit 6.

On the other hand, the base station system unit 13 processes the outgoing signal transmitted from the terminal 1 and transmits an incoming signal to the counterpart terminal 14 to form a call. Then, when the user of the terminal 1 inputs a voice signal through the handset phone 2, the codec unit 3 of the terminal 1 signals the voice signal input through the handset phone 2. The process is inputted to the wireless module unit 6 via the changeover switch 7. In addition, the wireless module unit 6 under the function control of the main control unit 9 of the terminal 1 wirelessly processes the voice signal input through the codec unit 3 and communicates with the other party via the base station system unit 13. Since the transmission to the terminal 14 makes a normal call.

After the call function execution step (S3), the process proceeds to the VAD detection confirmation step (S4) to check whether there is a transmission signal flowing into the terminal by comparing with a set threshold signal. At this time, if the transmission signal D flowing into the terminal is greater than the set threshold signal R as a result of the check during the VAD detection confirmation step S4, the process proceeds to the normal transmission signal processing step S5 and normally the call to the transmitting terminal of the terminal. Supply current to execute normal transmission function. However, when the transmission signal D flowing into the terminal is smaller than the set threshold signal R as a result of checking during the VAD detection and checking step S4, it is determined that there is no voice signal transmitted and the process proceeds to the transmission path blocking step S6. By blocking the talk current supplied to the transmitter through the switch of the terminal.

Here, in the VAD detection confirmation step (S4), if the received signal (D) received by the terminal is less than the set threshold signal (R), the normal reception signal for supplying a normal current to the receiving terminal of the terminal to execute the normal receiving function If the received signal (D) received by the terminal is less than the set threshold signal (R) as a result of the checking during the processing step and the VAD detection confirmation step (S4), it is determined that there is no call signal received from the base station system unit. It further includes a receiving path blocking step of cutting off the communication current supplied to the receiving end through the switching switch.

In other words, the main control unit 9 of the terminal 1 of the present invention, when the system is turned on, the user's voice flowing through the VAD 8 connected to each of the caller and receiver of the handset 2, The strength of the received signal emitted to the signal or the receiver is detected and compared with a predetermined threshold signal (R). At this time, the main control unit 9 of the terminal 1 determines that the transmission / reception signals are normally input / output when the signal detected through the VAD 8 is greater than the threshold signal, and then the wireless module unit (7) through the switching switch (7). The transmitter 4 or receiver 5 of 6) controls to maintain a normal path. In this case, when the transmitting end 4 or the receiving end 5 of the radio module unit maintains a normal transmission / reception path, a call current is normally supplied to them. However, if the signal detected through the VAD (8) is less than the threshold signal, the main control unit 9 of the terminal 1 determines that the current transmission signal or the reception signal is not normally input and output, and through the switch 7 Blocking the transmission path or the reception path to block the call current flowing into the transmitting terminal 4 or the receiving terminal 5 of the wireless module unit 6 to minimize the consumption of the built-in battery of the terminal (1).

For example, when there is no voice of a user flowing into the handset 2, the VAD 8 detects it and inputs it to the main controller 9. Then, the main control unit 9 compares the input detection signal D with a preset threshold signal R. At this time, the user's voice is absent and thus flows into the handset 2 of the terminal 1. Since the detection signal D is smaller than the predetermined threshold signal R, the detection signal D is not displayed. Therefore, the main controller 9 blocks the transmission path of the transmitter 4 through the switch 7 according to the above result, thereby preventing the call current from flowing into the transmitter 4.

Similarly, when there is no received signal emitted to the handset of the handset 2, for example, when there is no signal received from the base station system unit 13, the VAD 8 detects this and sends it to the main control unit 9. Enter it. Then, the main control unit 9 compares the input detection signal D with a preset threshold signal R. In this case, since there is no signal received from the base station system unit 13, Since no signal is emitted to the handset of the handset 2, the detection signal D appears smaller than the preset threshold signal R. Therefore, the main control unit 9 blocks the reception path of the receiving terminal 5 through the switching switch 7 according to the result, thereby preventing the communication current from flowing into the receiving terminal 5.

For example, in the case where the terminal 1 is a GSM terminal, such GSM generally has a 20 ms voice signal made of 456 bits of data, where the 456 bits have eight blocks as shown in FIG. Each time slot is divided by 57 bits. Therefore, in order to demodulate the 20ms of voice, eight blocks are accepted. When the call is connected, the communication is performed in 26 multi frames (26 frames). Therefore, if there is no voice signal, the main controller 9 blocks the driving of the receiver 5 to accept the eight blocks and to turn off the four blocks through the switch 7, thereby reducing the operating current of the receiver. If the voice signal continues to be received, the receiver 5 continues to operate without the area that is off.

As described above, the present invention is provided with a means for detecting a transmission signal in the terminal to control the driving of the transmission means according to the presence or absence of the user's transmission signal, thereby minimizing the talk current consumed in the terminal through such a DTX function. This has the advantage of maximizing the remaining time of the battery.

In addition, according to the present invention, by detecting the presence of a received signal received from the outside having a detection means on the speaker side of the terminal and precisely control the driving of the receiving means according to the result, the terminal actively judges the receiving current Since it minimizes the consumption, there is also the effect of significantly improving the functionality of the terminal.

Claims (3)

In a mobile communication terminal equipped with a handset, A wireless module unit provided in the mobile communication terminal and including a transmitting end for transmitting a transmitting signal and a receiving end for receiving an external receiving signal, a switching switch for blocking a transmitting path of the transmitting end of the wireless module or a receiving path of the receiving end; A VAD connected to each of the handset and the handset of the handset to detect and output the intensity of a user's voice signal or a received signal emitted to the handset, and the handset or the handset detected by the VAD. And a main control unit for comparing the detected signal with the set threshold to calculate the result, and controlling the switching switch according to the calculated result signal to turn off the driving of the transmitting end and the receiving end. terminal. The VAD detection confirmation step of confirming whether there exists a transmission signal flowing into the mobile communication terminal by comparing with the set threshold signal, and the threshold signal R in which the transmission signal D flowing into the terminal is set as a result of checking during the VAD detection confirmation step. If it is larger than the normal transmission signal processing step of performing a normal transmission function by supplying the talk current to the terminal of the terminal normally, and the threshold signal (R) in which the transmission signal (D) flowing into the terminal as a result of checking during the VAD detection confirmation step is set. The control method of the mobile communication terminal with a D-Tx function characterized in that it comprises a transmission path blocking step of blocking the call current supplied to the transmitting end through the switching switch of the terminal if it is determined that there is no voice signal transmitted. The normal reception signal according to claim 2, wherein in the VAD detection confirmation step, when the received signal (D) received by the terminal is smaller than the set threshold signal (R), a normal reception signal is supplied to the receiving terminal of the terminal to execute a normal reception function. If the received signal (D) received by the terminal is less than the set threshold signal (R) as a result of the checking during the processing step and the VAD detection and checking step, it is determined that there is no call signal received from the base station system unit through the switching switch of the terminal. The control method of the mobile communication terminal with a D-Tx function, characterized in that it further comprises a receiving path blocking step of blocking the communication current supplied to the receiving terminal.

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