KR100379636B1 - Modem-connection mobile terminal using public switched telephone network and method of controlling the same - Google Patents

Abstract

The present invention provides a modem connection wireless terminal device using a telephone line for directly supporting a data communication by a modem through a wireless channel formed between the wireless terminal fixing device and the wireless terminal device by directly connecting the modem to the wireless terminal device of the wireless telephone device and the same. It relates to a control method.

To this end, the present invention is a wireless terminal device connected to a telephone line through a wireless channel connected to a wireless terminal device configured to wirelessly transmit and receive a signal of the telephone line through the wireless telephone fixing device, enabling computer communication Connected to the modem via a two-wire line, providing the modem with the same power supply and impedance as the conditions provided by a normal telephone line, and directly transmitting a signal of a telephone line wirelessly transmitted from the radiotelephone fixing device to the modem. Modem connection means for enabling wireless connection between the modem and the telephone line by performing a reverse transmission or reverse transmission thereof; And a control means for detecting whether the modem is driven and controlling a radio channel connection between the radiotelephone fixing device and the radio terminal device.

As a result, the present invention enables convenient computer communication regardless of the telephone terminal withdrawal position and the computer installation location.

Description

MODEM-CONNECTION MOBILE TERMINAL USING PUBLIC SWITCHED TELEPHONE NETWORK AND METHOD OF CONTROLLING THE SAME}

The present invention relates to a wireless terminal device for supporting data communication between a wireless channel and a wired modem, and a control method thereof. In particular, the wireless terminal device is directly connected to a wireless terminal device of a wireless telephone and is formed between the wireless telephone fixing device and the wireless terminal device. The present invention relates to a modem access wireless terminal device using a telephone line and to a method of controlling the same, which enables data communication using a modem through a wireless channel.

In the example of using a conventional telephone line and a wireless telephone and modem, as shown in FIG. 1, when subscribers make a wireless call using a telephone line, the wireless telephone portable device is connected to the telephone line after the wireless telephone fixing device is connected to the telephone line. Incoming and outgoing calls were used. In addition, PC-type models using modems used modems (built-in or external to PCs) directly connected to telephone lines by wire.

However, in the case of performing data communication by directly connecting a modem to the telephone line, there is an inconvenience in that the user's use radius is limited according to the telephone terminal withdrawal position and the installation place of the fish.

On the other hand, in the example of using a modem using a conventional wireless network, as shown in Figure 2, subscribers mainly used two kinds of wireless communication or wireless communication using the wireless network. One is that subscriber who wants to communicate by using wireless LAN (LAN) connects wireless channel with wireless LAN communication station using wireless LAN terminal (wireless handset) and wirelessly through service network provided by wireless LAN service provider. On the other hand, the subscriber of the existing PC series connected the wireless channel to the mobile station through the mobile phone terminal and wirelessly communicated through the service network provided by the mobile phone operator.

Therefore, the necessity of a product capable of simultaneously performing the functions of the wireless telephone and the wired telephone using the existing telephone line has emerged, but there are problems such as difficult to realize due to technical problems.

The present invention has been made to solve the above problems, an object of the present invention is to provide a modem connection means capable of directly connecting a modem to the terminal device of the wireless telephone, by the modem connection means and the wireless telephone fixing device By enabling data communication through a modem using a wireless channel formed between wireless terminal devices, it is possible to actively communicate with a computer regardless of the use radius, but also to the surrounding environment of a computer installation place and a telephone terminal withdrawal place. The present invention provides a modem access wireless terminal device using a telephone line and a control method thereof.

In order to achieve the above object, a device according to the present invention is a wireless terminal fixed to a wireless telephone fixed device connected to a telephone line and configured to wirelessly transmit and receive a signal of the telephone line through the wireless telephone fixed device. An apparatus, comprising: a modem connected to a modem for enabling computer communication via a two-wire line to provide the modem with the same modem operating power and impedance as the conditions provided by a regular telephone line, the telephone being wirelessly transmitted from the radiotelephone fixture An embodiment may be configured to include a modem connection means for transmitting a signal of a line directly to the modem or a reverse transmission thereof so that the modem and the telephone line can be wirelessly connected. Sensing and a wireless sleeve between the radiotelephone fixing device and the radio Further comprises a control means for controlling the connection may be formed of another embodiment.

In each of the embodiments of the present invention, the modem connection means may include data carrier compensation means for removing a carrier wave generated during signal transmission and reception to the modem, and a telephone line wirelessly transmitted through the wireless terminal device. Modem driving means for directly driving the modem under the same conditions as the telephone line by blocking the voice signal included in the signal and providing the operating power and impedance required for driving the modem, and detecting whether the modem is driven or not. According to a result, it is determined whether to use a modem, and a modem use decision signal for controlling a radio channel connection operation between the radiotelephone fixing device and the radio terminal device in the control means is generated and provided to the control means. It can be configured to include a sensing means.

In order to achieve the above object, the present invention is a wireless telephone fixing device connected to a telephone line is connected through a wireless channel is configured to wirelessly transmit and receive a signal of the telephone line through the wireless telephone fixing device, Provides the power and impedance provided through the telephone line to the modem connected through the two signal transmission lines, thereby transmitting the signal of the telephone line wirelessly transmitted from the radiotelephone fixing device to the modem or the reverse transmission thereof to the modem and the telephone line. A method for controlling a wireless terminal device having a modem connection means for enabling a wireless connection, the method of controlling a wireless terminal device, which is initiated by driving a modem, requests a wireless channel connection to the radiotelephone fixing device, and connects the modem with the modem through the modem connection means. The communication channel between the signal transmission line is opened to transfer the radio channel and the signal. Initiated by a modem connection mode control process for controlling data communication between transmission lines and pressing a call button of a subscriber, requesting a wireless channel connection to the radiotelephone fixed device, and a call for modulation / demodulation and transmission / reception of radio signals. An outgoing call mode control process for controlling an outgoing call between the radio channel and the call path by opening a road; Initiated by the subscriber's call button pressing operation performed in the state, the incoming call for controlling the incoming call between the wireless channel and the communication channel by transmitting a call initiation signal to the radiotelephone fixed device and opening the channel; It can be configured to include the mode control process.

Particularly, the modem connection mode control process detects whether the modem is driven through the modem connection means, and if the modem is driven, transmits a radio call start request signal for wireless channel connection to the radiotelephone fixed device. Correspondingly waiting for a radio call authentication signal generated from the radiotelephone fixing device; and if the reception of the radio call authentication signal generated from the radiotelephone fixing device is received in the reception standby state, the modem connection means; Opening a communication path between the modem and the signal transmission line through the data communication between the wireless channel connected by the radiotelephone fixed device and the signal transmission line connected to the modem.

1 is a block diagram showing an example of a wireless telephone and modem connection using a conventional telephone line

2 is a configuration diagram showing an example of using a modem using a conventional wireless network

3 is an overall circuit block diagram showing an example of a configuration of a wireless telephone for explaining a modem access wireless terminal using a telephone line according to the present invention.

Figure 4 is a detailed circuit block diagram of the radiotelephone fixing device of Figure 3 supporting a wireless terminal device according to the present invention;

Figure 5 is a detailed circuit block diagram showing an embodiment of a wireless terminal device according to the present invention

6 is a detailed circuit block diagram showing an example of the configuration of the modem connection means of FIG.

7 is a reference diagram for explaining a carrier compensation principle performed in the data carrier compensation unit.

FIG. 8 is a detailed circuit block diagram showing an example of a configuration of the modem driving means of FIG.

9 is a detailed circuit block diagram showing an example of a configuration of the modem usage detecting means of FIG.

10 is a signal flowchart for a control process in a modem connection mode

11 is a signal flowchart for a control process in an outgoing call mode by a portable device;

12 is a signal flowchart for a control process in an incoming call mode

<Explanation of symbols for the main parts of the drawings>

10: wireless telephone fixing device 11: telephone line connection means

12, 23: signal detection means 13, 24: radio modulation means

14, 25: signal transmission means 15, 22: wireless demodulation means

16, 26: control means 17, 21: wireless signal transmission and reception means

20: wireless phone portable device 27: signal transmission and reception means

30: telephone connection means 50: modem connection means

51: data return compensation means 51a: signal receiving means

51b: signal transmitting means 51c, 51d: signal size phase adjusting means

51e, 51f: synthesizing means 52: modem driving means

52a: DC power supply means 52b, 52c: AC signal blocking means

53a, 53b: current sensing means 53c: modem usage determining means

60: modem 100: wireless terminal device

These objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description.

Hereinafter, a case where a modem access wireless terminal device according to the present invention is applied to a portable device of a wireless telephone and a control method thereof are proposed as preferred embodiments. In addition, in the present specification, a case in which the wireless terminal device is connected to a wired modem mounted on a PC is described as an example, but the technical idea of the present invention is not limited thereto and may be variously modified by those skilled in the art. Of course.

3 is an overall circuit block diagram showing an example of a configuration of a wireless telephone for explaining a modem access wireless terminal using a telephone line according to the present invention. The wireless telephone fixing device 10, the wireless terminal 100 and , The telephone 40 and the modem 60 mounted on the PC 70.

Referring to FIG. 3, the wireless terminal device 100 according to the present invention includes a wireless telephone portable device 20 connected to a wireless telephone fixing device 10 directly connected to a telephone line through a wireless channel, and the wireless telephone portable device. The telephone connection means 30 for the call and the modem 60 for enabling computer communication are connected via a two-wire line to provide the same modem driving power and impedance as the conditions provided by a normal telephone line, and to fix the wireless telephone. And modem connection means 50 for directly transmitting the signal of the telephone line wirelessly transmitted from the device to the modem or vice versa to enable the modem and the telephone line to be wirelessly connected.

The talker 40 connected to the talker connection means 30 may be, for example, a handset built in a portable device, and is detachably attached to the outside of the portable device as a talker that is expanded and connected through the talker connection means. It may be a microphone integrated earphone to be installed.

4 is a detailed circuit block diagram of the radiotelephone fixing apparatus of FIG. 3 supporting the radio terminal apparatus according to the present invention.

4, a telephone line connection means 11 for connection to a telephone line, a wireless signal transmission and reception means 17 connected to an antenna to perform a wireless signal transmission and reception function, the telephone line connection means and a wireless signal transmission and reception The signal detecting means 12 and the radio modulating means 13 for detecting a signal of a telephone line and modulating it into a radio signal between the means, and demodulating the radio signal between the telephone line connecting means and the wireless signal transmitting and receiving means to the telephone line. Wireless demodulation means 15 and signal transmitting means 14, and fixing device control means 16 for controlling the overall function of the fixing device. In the radiotelephone fixing device of such a configuration, each component is designed to widen the frequency use bandwidth compared to the voice signal transmission and reception bandwidth of the call so that the communication band for transmitting the voice signal for communication and data signals transmitted and received when the modem is connected. It is preferable.

FIG. 5 is a detailed circuit block diagram of the wireless terminal device of FIG. 3 according to the present invention. The wireless signal transmitting and receiving unit 21 is connected to an antenna to perform a wireless signal transmitting / receiving function with the fixed device. And a signal transmitting and receiving means 27 connected to the means and the modem connection means to perform a voice signal transmission and reception function to or from a telephone and a modem, and to demodulate a radio signal between the wireless signal transmission and reception means and the signal transmission and reception means. Wireless demodulation means 22 and signal detection means 23 for detecting a voice signal for communication or a data signal for communication, and a voice signal for communication or a data signal for communication are detected between the wireless signal transmission and reception means and the signal transmission and reception means. The signal transmitting means 25 and the signal modulating means 24 for modulating the signal and the overall function of the portable apparatus, in particular the modem It includes a portable device control unit 26 for controlling a radio channel connection between the radiotelephone unit and the fixed radio terminal device detects whether or not driving.

FIG. 6 is a detailed circuit block diagram showing an example of the configuration of the modem connection means 50 of FIG. 3. According to FIG. 6, the modem connection means is a wireless telephone portable apparatus (or a wireless terminal having the same function). Data carrier compensating means (51) for removing a carrier wave generated during signal transmission and reception between the signal transmitting and receiving means (27) and the modem (60), and the signal transmitting and receiving means in a signal of a wirelessly transmitted telephone line. Modem driving means 52 for directly driving the modem under the same conditions as the telephone line by blocking the voice signal and providing the operating power and impedance required for driving the modem, and detecting whether the modem is driven. In order to determine whether to use the modem according to the detection result, and to control the radio channel connection operation between the radiotelephone fixing device and the radio terminal device in the control means. It comprises a modem using the sensing means (53) for generating a modem used to provide a determination signal to the portable device control unit 26.

The data conveyance compensating means (51) includes signal receiving means (51a) and signal transmitting means (51b) for receiving or transmitting a signal transmitted from a signal transmitting means and a modem of a portable apparatus, respectively, and the radio terminal from the modem. First signal size phase adjusting means (51d) for detecting a signal transmitted to the device to adjust the signal size and phase out of phase, and transmitting a signal whose magnitude and phase are adjusted in the reverse phase from the wireless terminal device to the modem First synthesizing means (51f) for synthesizing with the signal and outputting only the carrier-free signal to the modem, and a second for detecting a signal transmitted from the wireless terminal device to the modem and adjusting the signal magnitude and phase in reverse phase. The signal size phase adjusting means 51c and a signal whose size and phase are adjusted in the reverse phase are transmitted from the modem to the wireless terminal device. The second may be of a synthesizing means (51e) for outputting only a number and a synthesized carrier cancellation signal to the wireless terminal device.

In this case, the carrier compensation principle of the data carrier compensation unit 51 is shown in more detail in the reference diagram of FIG. 7. According to FIG. 7, the data return compensation means may be provided in the signal transmission line transmitted from the modem to the wireless terminal device and the signal transmission line transmitted from the wireless terminal device to the modem, respectively. Here, the carrier compensation principle will be described in more detail. For example, the receive input signal A, the transmit output signal B, the receive output signal C, the transmit input signal D, the second transfer cancellation signal E, the first transfer cancellation signal F, the first and second When the signal size phase adjuster gain is G, the reception signal acquisition signal is H, the first synthesis unit input signal is I, the transmission unit extraction signal is J, and the second synthesis unit input signal is K,

The received signal side output C is C = I + F = I + J * G, and the first synthesizer input signal I is I = A + By-H, so C = A + By-H + J * G. Can be represented again.

However, assuming that H ≪ A (assuming that H is taken so small that it can be neglected), the equation C = A + By + J * G is established, where G is again 180 degrees. The result is the equation C = A + By-J * G.

By adjusting the amplification so that By = JG, By-JG = 0 is established.

Therefore, the expression of the received signal side output C = A can be established. Consequently, if the gain of the first signal size phase adjusting means 51d is By / J and the phase is inverted and synthesized, the output C of the carrier compensation means Can pass a signal from which a carrier, such as input A of the carrier compensation means, has been removed.

On the other hand, since the transmission signal side output B is B = K + E = K + H * G, and the input signal K of the second synthesis unit is K = Ax + DJ, it is represented as B = Ax + D-J + H * G again. Can be.

However, assuming that J ≪ D (assuming that J is taken small enough to be negligible), the equation B = Ax + D + H * G is established, where G is set to 180 °. Then B = Ax + DH * G.

If the amplification degree is adjusted so that Ax = HG, the equation of Ax-HG = 0 is established.

Therefore, the expression of the transmission signal side output B = D can be established. Consequently, if the gain of the second signal size phase adjusting means 51c is Ax / H and the phase is inverted and synthesized, the output B of the carrier compensation means is obtained. Can pass a signal from which a carrier such as the input D of the carrier compensation means is removed.

The modem driving means 52, each of the DC power supply means 52a for supplying at least one DC power maintaining a constant level, and the DC power supplied from the DC power supply means to each of one or more different levels, respectively It can be composed of a pair of AC signal blocking means 52b, 52c which converts and extracts only the respective DC components and supplies them to the signal transmission line connected to the modem.

The modem use detecting means 53 may include one or more current detecting means 53a and 53b respectively detecting modem driving currents flowing through the signal transmission lines between the modem driving means 52 and the modem 60; The modem may be configured to check whether the modem is used by checking the output of the one or more current sensing means, and to generate a modem use determination signal according to the determination result.

Fig. 8 is a detailed circuit block diagram showing an example of the configuration of the modem driving means 52 of Fig. 6, wherein each AC signal cutoff means 52b is a voltage output from the DC power supply means 52a. Step-up means for boosting the voltage to a level necessary for driving the modem, low-pass passage means for blocking an AC component of each output of the boosting means and passing only a DC component, and impedance between the signal transmission line and the low-frequency passage means. Impedance matching means for matching each with an impedance of the same condition as the telephone line.

FIG. 9 is a detailed circuit block diagram showing an example of the configuration of the modem usage detecting means 53 of FIG. 6, wherein each of the current sensing means 53a and 53b includes the modem driving means 52 and the modem 60. As shown in FIG. Impedance voltage detecting means for detecting voltage across the impedance connected to each signal transmission line between the &lt; RTI ID = 0.0 &gt;) &lt; / RTI &gt; and &quot; voltage amplifying means &quot; for a predetermined level amplifying the voltage detected by the impedance voltage detecting means, respectively.

The modem use determining means 53c compares one or more limiters which respectively remove a portion above or below a predetermined level of each current sensing output, and whether the output of each limiter is above a predetermined voltage or less and compares the result. According to the present invention, the modem use determination signal generating means for generating a modem use determination signal can be configured.

10 to 12 illustrate signal transmission / reception control operations between a modem and a telephone line, which are respectively executed by a control unit mounted on the radiotelephone fixing device 10 and the radiotelephone portable device 20 of FIG. 3. Signal flow for the control process in the modem connection mode, Figure 11 shows the signal flow for the control process in the outgoing call mode by the portable device, Figure 12 details the signal flow for the control process in the incoming call mode, respectively Is shown.

According to FIG. 10, the control process in the modem connection mode checks whether the modem use determination signal generated by the modem connection means is received and detects whether the modem is driven. Transmitting a radio call initiation request signal for a wireless channel connection to a mobile station and waiting to receive a radio call authentication signal generated from the radiotelephone fixing device in response thereto; If it is confirmed whether the received wireless call authentication signal is received, the modem access means opens a communication path between the modem and the signal transmission line and between the radio channel connected by the radiotelephone fixing device and the signal transmission line connected to the modem. It may be divided into the step of initiating data communication.

According to FIG. 11, the control process in the outgoing call mode is initiated by pressing a call button of a subscriber, and sends a radio call initiation request signal for connection to a radio channel to the radiotelephone fixing device and then corresponds to the radio call. Waiting to receive a wireless call authentication signal from a telephone fixing device; and checking whether the wireless call authentication signal has been received in the reception state, and opening a channel for radio signal modulation / demodulation and transmission / reception and talking with the wireless channel. It can be divided into the step of controlling the call between the local.

According to Figure 12, the control process in the incoming call mode, the step of ringing the ring bell of the portable device by the wireless telephone fixed device transmits a wireless connection start request and a ring signal to the wireless telephone portable device in response to the incoming bell detection And initiated by a subscriber's call button pressing operation performed in a state where there is a ring signal and a request for a wireless channel connection from the radiotelephone fixing device, and transmits a call initiation signal to the radiotelephone fixing device. At the same time, a call path may be opened to control an incoming call between the wireless channel and the call path.

When described in more detail with reference to Figures 3 to 12 the operation and the resulting effects of the present invention as described above.

First, in the fixed device control means 16 and the portable device control means 26, the operation modes are three control processes in the modem connection mode, the outgoing call mode, and the incoming call mode, as shown in the signal flow charts of FIGS. It can be divided into

One is the control process in the modem connection mode of FIG. 10. The modem connection mode is a control procedure until the modem is connected to the telephone line when the modem is trying to communicate, and the first operation is started by the subscriber's modem operation. .

When the modem is driven, the modem use detecting means 53 detects whether the modem is driven and provides a modem use determination signal informing the control means 26 of the portable device. The means 26 sends a radio call initiation request signal requesting a radio channel connection to the radiotelephone fixing device 10 via the radio signal transmission and reception means 21. When the radio call start request signal is received by the radio signal transmission / reception means 17 of the radio telephone fixing device 10, the radio signal transmission / reception means 17 notifies the corresponding control means 16 that the radio call start request signal has been received. The control means 16 of the telephone fixing device 10 again transmits a wireless call authentication signal through the wireless signal transmission / reception means 17.

At the time of sending the wireless call authentication signal, the control means 16 of the radiotelephone fixing device 10 connects the radio demodulation means 15 and the radio modulation means 13, and transmits a signal to the signal detection means 12. The means 14 and the telephone line connecting means 11 are controlled to connect with the telephone lines.

The control means 26 of the radiotelephone portable device 20 which has received the radio call authentication signal comprises a radio demodulation means 22, a signal detection means 23, a signal modulation means 24 and a signal transmission means 25. The wireless communication path is opened to connect, and the modem 60 is connected to the modem 60 through the signal transmission and reception means 27 and the modem connection means 50, thereby starting data communication through the communication path between the modem and the telephone line.

As described above, the technical background for enabling data communication by connecting a modem and a telephone line wirelessly is to fix radio telephones having a wider frequency bandwidth than conventional telephone circuits to accommodate both voice and data signals. This is made possible by the power supply and impedance matching between the main channel and the radio channel made by the radio channel between the device 10 and the radiotelephone portable device 20 and the modem connection means.

First, the overall operation of the present invention by referring to Figure 3, the voice signal for the call is transmitted and received to the external caller 40 or the built-in handset through the communication device connecting means 30 to make a voice call The data signal for communication is transmitted and received to the modem mounted in the computer through the modem connection means 50 to enable data communication. When the data communication is driven by the computer and the modem, the radiotelephone portable apparatus 20 detects whether the modem is driven through the modem connection means 50 and the radiotelephone portable apparatus 20 and the radiotelephone fixing apparatus 10 This is enabled by connecting a wireless channel between the terminals, and thus data signals for communication in a data communication path connected by a modem can be transmitted through a telephone line through a wireless channel connected to a radiotelephone fixing device.

To describe this operation in more detail, the radiotelephone fixing device 10 is equipped with a telephone line connection means 11 and a wireless signal transmission and reception means 17 to connect the telephone line and the portable device, as shown in FIG. Among them, a signal is transmitted / received with the telephone line, in particular, through a telephone line connecting means 11 which is directly connected to the telephone line and is connected to the AC line. The signal received from the telephone line through the telephone line connecting means 11 is sent to the radio modulation means 13 through the signal detecting means 12, wherein the modulated signal is transmitted to the radio signal transmitting and receiving means 17 and the antenna. It is sent to the radiotelephone portable device 20 through. In addition, the signal sent from the radiotelephone portable device 20 is received through the radio signal transmission and reception means 17, reproduced by the radio demodulation means 15, and the size of the signal is transmitted from the signal transmission means 14. It is transmitted via the means 11 to the telephone line.

The radiotelephone portable apparatus 20 receives the signal transmitted from the radiotelephone fixing apparatus 10 of FIG. 4 through the radio signal transmitting and receiving means 21 as shown in FIG. The signal detecting means 23 adjusts the magnitude of the signal and transmits the signal to the signal transmitting and receiving means 27. Among the transmitted signals, a voice signal for a call is supplied to an external caller 40 or a built-in handset through the caller connecting means 30 to make a call. On the other hand, the data signal for modem communication among the transmitted signal is sent to the modem connection means 50, the modem connection means 50 by providing the same conditions as the power and impedance environment that the modem is provided on the telephone line, Start the modem without the line. In addition, the data signal transmitted from the modem is transmitted to the signal transmission and reception means 27 through the modem connection means 50, the data signal passed through the signal transmission and reception means 27 is adjusted in size by the signal transmission means 25, In addition, the signal modulating means 24 is modulated into a radio signal, and the modulated signal is transmitted to the radiotelephone fixing apparatus 10 through a radio channel through the radio signal transmitting and receiving means 21.

However, the signal transmission method used in the modem is a method of simultaneously transmitting the transmission signal and the reception signal using two wires, so that it is difficult to detect the transmission signal and the reception signal from the synthesized signal, and the transmitted signal is Since it is mixed with the received signal and returned to the carrier, it is difficult to receive the data without breaking data, and thus measures are required.

To this end, the modem connection means 50 of the present invention first uses the data carrier compensation means 51, as shown in FIG. According to the operation principle of the data carrier compensation means 51 of FIG. 7 mentioned above, the signal transmitted from the modem is detected, and the magnitude and phase are adjusted in the reverse phase by the first signal size phase adjusting means 51d, and the first By combining the adjusted signal with the received signal by the combining means 51f, the carrier is removed, so that only the received signal from which the carrier is removed from the signal received by the signal receiving means 51a can be supplied to the modem. On the contrary, the signal transmitted from the modem is synthesized by the second signal changing means supplied by the second signal size phase adjusting means 51c and the second synthesizing means 51e, so that the carrier wave is removed from the signal transmitted by the signal transmitting means 51b. Only the transmission signal is supplied to the signal transmission / reception means 27 of the radiotelephone portable apparatus 20 to supply a stable data signal.

On the other hand, since a wired modem is generally designed to be driven only when connected to a telephone line, it should not be driven independently and should be able to be driven without signal attenuation.

To this end, the modem connecting means 50 of the present invention uses a modem driving means 52 composed of a DC power supply means 52a and two AC signal blocking means 52b, 52c, as shown in FIG. . According to the modem driving means of Fig. 8, the DC power supplied from the DC power supply means 52a is boosted by each of the boosting means of the AC signal blocking means 52b and 52c, respectively, so that the modem can be driven. The low voltage passing means of the AC signal blocking means 52b, 52c cuts off the audio signal and passes only the DC component to supply power to the modem. At this time, in the impedance matching means of the AC signal blocking means 52b and 52c, by matching the impedance between the modem and the low frequency passing means, it is possible to provide the same driving power and impedance environmental conditions as those provided by the telephone line. do.

By using the AC signal blocking means 52b and 52c, the modem can be driven without canceling voice and data signals, thereby enabling the modem to be driven without directly connecting the modem to the telephone line.

On the other hand, when the impedance is connected between the modem driving means and the modem to supply power and transmit and receive signals, a small amount of voltage is generated across the impedance when the modem is driven.

To this end, in the modem connecting means 50 of the present invention, thirdly, the current detecting means 53a and 53b and the modem use determination between the modem 60 and the signal transmitting and receiving means 27 of the radiotelephone portable apparatus 20 are determined. The modem usage is detected using the modem usage detecting means 53 configured as shown in FIG. According to this, when the modem is driven, the impedance voltage detecting means of the current sensing means 53a and 53b detects the minute voltage across the impedance. Since the detected voltage is a very minute voltage, it is uncertain to judge the information by any signal, and the voltage amplifying means is used to amplify the use enough. The amplified signal is compared with the voltage determined by the limiter of the modem use determining means 53c or less, and the modem use determination signal generating means generates a determination signal of whether the modem is used or not. The modem use determination signal is then sent to the control means 26 of the radiotelephone portable apparatus 20.

Therefore, a wireless connection is made to the radiotelephone fixing device 10 through the radio signal transmitting and receiving means 21 under the control of the control means 26 of the radiotelephone portable apparatus 20 and communication between the modem and the telephone line is made possible.

The other one of the three control procedures is the control procedure in the outgoing call mode of FIG. 11, which is a control procedure until the portable device caller is connected to the telephone line when the outgoing call is to be made using the portable device. The operation is initiated by pressing the call button of the subscriber.

When the subscriber presses the call button, the control means 26 of the cellular phone portable apparatus 20 transmits a radio call initiation request signal for wireless channel connection to the radiotelephone fixed device 10 through the radio signal transmitting and receiving means 21. send.

When the radio call start request signal is received by the radio signal transmission / reception means 17 of the radio telephone fixing device 10, the radio signal transmission / reception means 17 notifies the corresponding control means 16 that the radio call start request signal has been received. The control means 16 of the telephone fixing device 10 transmits a wireless call authentication signal to the wireless telephone portable device 20 through the wireless signal transmission / reception means 17.

At the time when the wireless call authentication signal is transmitted, the control means 16 of the radiotelephone fixing device 10 connects the radio demodulation means 15 and the radio modulation means 13, and the signal detection means 12 and the signal transmission means. (14) and the telephone line connecting means 11 are connected to the telephone line.

The control means 26 of the wireless telephone portable apparatus 20 which has received the radio call authentication signal connects the wireless demodulation means 22, the signal detecting means 23, the signal modulating means 24, and the signal transmitting means 25. The wireless communication path is opened, and the communication device 40 is connected through the signal transmission / reception means 27 and the communication device connection means 30 to open a communication path between the communication device and the telephone line, thereby making a voice call.

The other is the control process in the incoming call mode of Fig. 12, and the operation is started by the incoming call from the telephone line.

When the bell is received from the telephone line, the control means 16 of the radiotelephone fixing device 10 transmits the radio connection start signal and the bell signal together to the radiotelephone portable device 20 through the radio signal transmission and reception means 17.

When the radio signal start signal and the bell signal are received by the radio signal transmission / reception means 21 of the cellular phone portable apparatus 20, the radio signal transmission / reception means 21 receives the radio connection start signal and the bell signal by the corresponding control means 26. The control means 26 of the wireless telephone portable apparatus 20 sends a wireless connection authentication signal through the wireless signal transmission / reception means 21 and transmits a ring tone to the outside.

When the subscriber hears the ring tone and presses the call button, the control means 26 of the portable telephone 20 transmits a wireless call start request signal to the wireless telephone fixture 10.

The control means 16 of the radiotelephone fixed device 10 receiving the radio call initiation request signal connects the radio demodulation means 15 and the radio modulation means 13, and the signal detection means 12 and the signal transmission means ( 14) and the telephone line connecting means 11 is connected to the telephone line.

At the time point at which the radio call start request signal is transmitted, the control means 26 of the radiotelephone portable apparatus 20 includes the radio demodulation means 22, the signal detection means 23, the signal modulation means 24, and the signal transmission means 25. ) To open a wireless communication path, and to connect the communication device 40 through the signal transmission and reception means 27 and the communication device connection means 30 to make a voice call by opening the communication path between the communication device and the line. do.

The present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

Therefore, the present invention enables the data communication by the modem using a wireless channel formed between the radiotelephone fixing device and the radio terminal device by means of a modem connection means capable of directly connecting the modem to the terminal device of the radio telephone. It is possible to actively carry out computer communication regardless of the radius of use, while improving the surrounding environment of the computer installation site and the telephone terminal withdrawal area, and it also functions as a cordless telephone and a landline telephone using the existing telephone line. There is an advantage that can be done at the same time.

Claims (15)

delete delete delete A modem that enables computer communication is connected via a two-wire line to provide the modem with the same modem operating power and impedance as the conditions provided by a regular telephone line, and to provide a signal of a telephone line wirelessly transmitted from a radiotelephone fixture. Modem connection means for allowing the modem and the telephone line to be wirelessly connected by transmitting directly to the modem or vice versa, and detecting whether the modem is driven to establish a wireless channel connection between the radiotelephone fixing device and the radio terminal device. A modem connection radio using a telephone line connected to the radiotelephone fixing device connected to the telephone line through a wireless channel, the control means controlling the radio line to transmit and receive the signal of the telephone line through the radiotelephone fixing device. In the terminal device, The modem connection means, And a data carrier compensation means for removing a carrier wave generated during signal transmission and reception to the modem, wherein the signal transmission line is transmitted from the modem to the wireless terminal device and the signal transmission is transmitted from the wireless terminal device to the modem. Each of the data conveying compensation means is provided on a line; Modem driving for directly driving the modem under the same conditions as the telephone line by blocking the voice signal included in the signal of the telephone line wirelessly transmitted through the wireless terminal device and providing an operating power and impedance required for driving the modem. Means driving means, the modem driving means is a DC power supply means for supplying a DC power of a predetermined level, the DC power supplied from the DC power supply means for level conversion to one or more different levels, each DC component A pair of AC signal blocking means for extracting bays and supplying them to the signal transmission lines connected to the modem; Detects whether the modem is driven and determines whether to use the modem according to the detected result, and generates a modem use determination signal for controlling the radio channel connection operation between the radiotelephone fixing device and the radio terminal device in the control means. And modem usage detection means provided to the control means, wherein the modem usage detection means comprises one or more current sensing means for detecting a modem driving current flowing through each signal transmission line between the modem driving means and the modem; And modem usage determination means for checking whether the modem is used by checking the output of the at least one current sensing means, and generating a modem usage determination signal in accordance with the determination result. The method of claim 4, wherein the data return compensation means, First signal size phase adjusting means for detecting a signal transmitted from the modem to the wireless terminal device and adjusting a signal size and a phase out of phase; First synthesizing means for synthesizing the anti-phase-scaled and phase-adjusted signals with the signals transmitted from the wireless terminal device to the modem and outputting only the carrier-free signal to the modem; Second signal size phase adjusting means for detecting a signal transmitted from the wireless terminal device to the modem and adjusting a signal magnitude and a phase out of phase; And a second synthesizing means for synthesizing the anti-phase-scaled and phase-adjusted signal with the signal transmitted from the modem to the wireless terminal device and outputting only the carrier-free signal to the wireless terminal device. Modem access wireless terminal device. delete delete The method of claim 4, wherein the AC signal blocking means, Boosting means for boosting the output of the DC power supply means to a level necessary for driving a modem; Low frequency passage means for blocking an AC component of the output of the boosting means and passing only a DC component; And an impedance matching means for matching an impedance between the signal transmission line and the low frequency passing means to an impedance under the same condition as the telephone line. delete delete According to claim 4, wherein each of the current sensing means, Impedance voltage detecting means for detecting a voltage across an impedance connected to each signal transmission line between the modem driving means and the modem; And a voltage amplifying means for amplifying the voltage detected by said impedance voltage detecting means at a predetermined level. The method of claim 4, wherein the modem use determination means, One or more limiters for respectively removing portions above or below a predetermined level of each current sensing output; And a modem use determination signal generating means for comparing whether the output of each limiter is above a predetermined voltage or less and generating a modem use determination signal according to the comparison result. A wireless telephone fixture connected to a telephone line, which is connected through a wireless channel, is configured to wirelessly transmit and receive a signal of the telephone line through the wireless telephone fixture, and provides two signals of power and impedance that the modem has been provided through the telephone line. And a modem connection means provided to a modem connected through a transmission line to transmit a signal of a telephone line wirelessly transmitted from the radiotelephone fixing device to the modem or reverse transmission thereof to enable wireless connection between the modem and the telephone line. In one wireless terminal device control method, Detects whether the modem is driven through the modem connection means, and if it is confirmed that the modem is driven, the wireless telephone start request signal for the wireless channel connection to the wireless telephone fixing device is transmitted and correspondingly generated from the wireless telephone fixing device. Waiting to receive the wireless call authentication signal, and if the reception of the wireless call authentication signal generated from the radiotelephone fixing device is confirmed in the reception standby state, between the modem and the signal transmission line through the modem connection means. Opening a communication path and initiating data communication between a radio channel connected by the radiotelephone fixing device and a signal transmission line connected to the modem; Initiated by pressing a call button of a subscriber and sending a radio call initiation request signal for a wireless channel connection to the radiotelephone fixing apparatus and waiting to receive a radio call authentication signal from the radiotelephone fixing apparatus corresponding thereto; And checking whether or not the wireless call authentication signal is received in the reception standby state and controlling a call between the wireless channel and the call path by opening a channel for radio signal modulation / demodulation and transmission and reception. and; Initiated by pressing a call button of a subscriber which is performed in a state of receiving a radio signal from the radiotelephone fixing device and requesting a ring signal and a radio channel connection request according to an incoming ring detection, and starts a call to the radiotelephone fixing device. And an incoming call mode control step of controlling an incoming call between the wireless channel and the call path by transmitting a signal and simultaneously opening a call path. delete delete