KR20090011417A - Powerline modem with multi-functions and local area communication system using the same - Google Patents

Abstract

A power line modem using multiple functions and a short-distance communication system using the same are provided to perform the short-distance communication by using a coaxial cable for the cable television, a power line and a telephone line. A plurality of power line modems(700,700-1~700-n) are connected to a coaxial cable(100), a power line(200) and a telephone line(300) to transmit a short-distance communication signal. A user terminal(500-1) for performing the short-distance communication is connected to a power line modem(700-1). A television receiver(400-1) and a phone(600-1) are connected to the power line modem.

Description

Power line modem with multiple functions and short-range communication system using same {POWERLINE MODEM WITH MULTI-FUNCTIONS AND LOCAL AREA COMMUNICATION SYSTEM USING THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power line modem and a LAN system using the same, and more particularly, to perform short-range communication using all of coax cables, power lines, and telephone lines for cable television. And a short-range communication system using the same.

A local area network (LAN) that communicates between a number of computers or OA devices located in a certain space such as a company or home is typically a local area network (LAN), which is a small area within a small area. In order to connect a large number of computers or OA devices through a fast communication line to enable communication between devices. Here, computers or OA devices are generally connected via LAN cables, but in a space where LAN cables are difficult to install, they are connected via a power line modem.

In general, a power line modem is also called a power line modem, and refers to a modem whose medium of communication is a power line. It transmits data to be transmitted to single-phase or three-phase general household power by various modulation methods, receives data by the corresponding modulation method, and uses the power line as it is. It is used for various automation. Powerline modems communicate using a power network as a transmission medium.

Since a conventional power line modem having such a function enables short range communication using only a power line, there is a disadvantage in that a coaxial cable and a telephone line for wired television in a company or home cannot be used for short range communication. Furthermore, since electric appliances such as a television receiver, a refrigerator, and an air conditioner are connected to the power line to consume power, the short-range communication signal is attenuated by the power consumption of the electronic products when transmitting the short-range communication signal through a conventional power line modem. This is caused. In addition, when the power line is used as in the conventional power line modem, communication signal interference occurs between neighboring houses, which causes a problem of short-range communication performance, and causes disturbances such as noise, signal attenuation factor, and impedance variation. As a result, short-range communication is stably affected due to short-range communication performance.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a power line modem capable of performing short-range communication using all of coaxial cables, power lines, and telephone lines for cable television, and a short-range communication system using the same. have.

Another object of the present invention is to perform short-range communication by using all coaxial cables, power lines, and telephone lines for cable television, so as to perform optimum short-range communication without being affected by power consumption of electronic products connected to the power line. The present invention provides a power line modem and a short range communication system using the same.

Another object of the present invention is to provide a power line modem and a short-range communication system using the same by performing short-range communication by using all of coaxial cable, power line, and telephone line for cable television. have.

It is still another object of the present invention to provide a power line modem capable of performing short range communication using a coaxial cable, a power line, and a telephone line for a cable television without using a blocking filter, and a short range communication system using the same.

Power line modem having a multi-function according to an embodiment of the present invention for achieving the above object, connection means for connecting a coaxial cable, power line, telephone line, television receiver, user terminal, and telephone; A band filter for filtering an applied signal and supplying only a broadcast signal supplied through the coaxial cable to the television receiver; The short-range communication electrical signal selected from the coaxial cable, the power line, and the short-range communication electrical signals supplied through the telephone line is converted into a data signal and supplied to the user terminal, and the short-range data signal supplied from the user terminal A signal processor converting the communication electrical signal; A noise filter for filtering the applied signal to remove noise and at the same time supplying only the voice signal transmitted through the telephone line to the telephone, and passing the voice signal supplied from the telephone; And coupling a broadcast signal transmitted through the coaxial cable to the band pass filter, and selecting an optimal short range communication electrical signal from short distance communication electrical signals supplied through the coaxial cable, the power line, and the telephone line. Coupling to a processor, transmitting the electrical signal for short-range communication converted by the signal processor through the coaxial cable, the power line, and the telephone line, coupling the voice signal transmitted through the telephone line to the noise filter, And a coupling unit for transmitting the voice signal passing through the noise filter through the telephone line.

According to another embodiment of the present invention, a power line modem having multiple functions includes: coaxial cable, a power line, a television receiver, and connection means for connecting a user terminal; A band filter for filtering an applied signal and supplying only a broadcast signal supplied through the coaxial cable to the television receiver; The optimal short-range communication electrical signal selected from the coaxial cable and the short-range communication electrical signals supplied through the power line is converted into a data signal and supplied to the user terminal, and the data signal supplied from the user terminal is converted into a short-range communication electrical signal. A signal processor for converting; And coupling a broadcast signal transmitted through the coaxial cable to the band pass filter, selecting an optimum short range communication electrical signal from the short distance communication electrical signals supplied through the coaxial cable and the power line, and coupling the signal to the signal processor. And a coupling unit for transmitting the electrical signal for short-range communication converted by the signal processor through the coaxial cable and the power line.

According to still another embodiment of the present invention, a power line modem having a multi-function includes: a connection line for connecting a power line, a telephone line, a user terminal, and a telephone; Converts an optimal short-range communication electrical signal selected from the short-range communication electrical signals supplied through the power line and the telephone line into a data signal and supplies the data signal to the user terminal, and converts the data signal supplied from the user terminal into a short-range communication electrical signal. A signal processor; A noise filter for filtering the applied signal to remove noise and at the same time supplying only the voice signal transmitted through the telephone line to the telephone, and passing the voice signal supplied from the telephone; And selecting an optimum short-range communication electrical signal from among the short-range communication electrical signals supplied through the power line and the telephone line, coupling the signal to the signal processor, and converting the short-range communication electrical signal converted by the signal processor to the power line and the telephone line. And a coupling unit for transmitting the voice signal transmitted through the telephone line to the noise filter, and transmitting the voice signal passing through the noise filter through the telephone line.

The signal processor may be configured to convert an optimal short-range communication electrical signal selected through the coupling unit into a short-range communication digital signal, and convert the short-range communication digital signal converted from the digital signal output from the user terminal into a short-range communication electrical signal. A first signal converter; A second signal converter converting the digital signal for short-range communication converted by the first signal converter into a data signal, converting the data signal output from the user terminal into a digital signal for short-range communication, and outputting the digital signal to the first signal converter; ; An interface for connecting the digital signal converted by the second signal converter to the user terminal and connecting the data signal output from the user terminal to the second signal converter; And a line driver amplifying the short range communication electrical signal converted by the first signal converter and outputting the amplified electrical signal to the coupling unit.

Short-range communication system using a power line modem according to an embodiment of the present invention, a coaxial cable for transmitting a broadcast signal and the electrical signal for short-range communication; A power line for supplying power and for transmitting an electrical signal for short-range communication; Telephone lines for transmitting voice signals and electrical signals for local area communication; A plurality of user terminals for performing local area communication; And connected to the coaxial cable, the power line, and the telephone line, connected to any one of the plurality of user terminals, and converting a data signal output from the user terminal connected to the electronic signal into a short range communication electrical signal. Transmitted to the coaxial cable, the power line, and the telephone line, and converts an optimum short-range communication electrical signal among data signals transmitted through the coaxial cable, the power line, and the telephone line into a data signal, and is connected to itself. And a plurality of powerline modems transmitting to the user terminal.

The plurality of power line modems may include connecting means for connecting the coaxial cable, the power line, the telephone line, a television receiver, a telephone, and a user terminal connected with the user among the plurality of user terminals; A band filter for filtering an applied signal and supplying only a broadcast signal supplied through the coaxial cable to the television receiver; The short-range communication electrical signal selected from the coaxial cable, the power line, and the short-range communication electrical signals supplied through the telephone line is converted into a data signal and supplied to the user terminal connected to the user. A signal processor for converting the supplied data signal into an electrical signal for short range communication; A noise filter for filtering the applied signal to remove noise and at the same time supplying only the voice signal transmitted through the telephone line to the telephone, and passing the voice signal supplied from the telephone; And coupling a broadcast signal transmitted through the coaxial cable to the band pass filter, and selecting an optimal short range communication electrical signal from short distance communication electrical signals supplied through the coaxial cable, the power line, and the telephone line. Coupling to a processor, transmitting the electrical signal for short-range communication converted by the signal processor through the coaxial cable, the power line, and the telephone line, coupling the voice signal transmitted through the telephone line to the noise filter, And a coupling unit for transmitting the voice signal passing through the noise filter through the telephone line.

A short range communication system using a power line modem according to another embodiment of the present invention includes a coaxial cable for transmitting a broadcast signal and an electric signal for short range communication; A power line for supplying power and for transmitting an electrical signal for short-range communication; A plurality of user terminals for performing local area communication; And a coaxial cable connected to the coaxial cable and the power line, connected to any one of the plurality of user terminals, and converting a data signal output from a user terminal connected to the coaxial cable into an electrical signal for short range communication. A plurality of power line modems for transmitting to the power line and converting an optimum short distance communication electrical signal among data transmitted through the coaxial cable and the power line into a data signal and transmitting the data signal to a user terminal connected thereto; It is characterized by including.

Here, the plurality of power line modems, respectively, connection means for connecting the user terminal connected to itself of the coaxial cable, the power line, television receiver, and the plurality of user terminals; A band filter for filtering an applied signal and supplying only a broadcast signal supplied through the coaxial cable to the television receiver; The short-range communication electrical signal selected from the coaxial cable and the short-range communication electrical signals supplied through the power line is converted into a data signal and supplied to the user terminal connected to the self, and the data signal supplied from the user terminal connected to the self. A signal processor converting the signal into a short range communication electrical signal; And coupling a broadcast signal transmitted through the coaxial cable to the band pass filter, selecting an optimum short range communication electrical signal from the short distance communication electrical signals supplied through the coaxial cable and the power line, and coupling the signal to the signal processor. And a coupling unit for transmitting the electrical signal for short-range communication converted by the signal processor through the coaxial cable and the power line.

A short range communication system using a power line modem according to another embodiment of the present invention, a power line for supplying power and transmitting an electrical signal for short range communication; Telephone lines for transmitting voice signals and electrical signals for local area communication; A plurality of user terminals for performing local area communication; And a data line connected to the power line and the telephone line, connected to any one of the plurality of user terminals, and converting a data signal output from a user terminal connected to the power line into an electrical signal for short range communication. And a plurality of power line modems for converting an optimal short range communication electrical signal into a data signal among the short range communication electrical signals transmitted through the power line and the telephone line and transmitting the data signal to a user terminal connected thereto. It features.

Here, the plurality of power line modems, each of the power line, the telephone line, a telephone, and a connection means for connecting a user terminal connected to itself of the plurality of user terminals; Converts an optimal short-range communication electrical signal selected from among the short-range communication electrical signals supplied through the power line and the telephone line into a data signal and supplies the data signal to a user terminal connected to the user; A signal processor for converting an electric signal for near field communication; And selecting an optimum local area credit electric signal from among the electric signals for local area communication supplied through the power line and the telephone line, coupling the signal to the signal processor, and converting the electric signal for local area communication converted by the signal processor to the power line and the telephone line. And a coupling unit transmitting through a telephone line.

A multi-function power line modem according to the present invention having the above-described configurations and a short-range communication system using the same are provided for carrying out short-range communication using all of coaxial cables, power lines, and telephone lines for cable television, thereby providing It is possible to perform optimum short-range communication without being affected by power consumption and to increase the utilization of coaxial cable and telephone line.

The multi-function power line modem and the short-range communication system using the same can perform short-range communication using all of coaxial cables, power lines, and telephone lines for cable television without using a blocking filter.

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

1 is a schematic diagram of a short-range communication system using a power line modem having multiple functions according to an embodiment of the present invention.

Referring to FIG. 1, a short range communication system according to the present invention includes a coaxial cable 100, a power line 200, a telephone line 300, a television receiver 400, a user terminal 500, a telephone 600, and multiplexing. A power line modem 700 having a function is provided.

The coaxial cable 100 is installed in a company or home to establish a local area network, and transmits a broadcast signal received from a broadcasting station (not shown) to the television receiver 400. The coaxial cable 100 also transmits an electric signal for short range communication.

The power line 200 is installed in a company or home to establish a local area network, and applies power supplied from a power plant (not shown) to various electronic devices. The power line 200 also serves to transmit an electrical signal for short-range communication.

The telephone line 300 is installed in a company or home to establish a local area network, and transmits a voice signal exchanged through a public switched telephone network (PSTN) (not shown). In addition, the telephone line 300 also serves to transmit an electric signal for short range communication.

The television receiver 400 is electrically connected to the coaxial cable 100 through the power line modem 700 and outputs a broadcast signal supplied through the coaxial cable 100 and the power line modem 700.

The user terminal 500 is electrically connected to the coaxial cable 100, the power line 200, the telephone line 300, and the like through the power line modem 700. The user terminal 500 performs short-range communication with another user terminal (not shown) through the coaxial cable 100, the power line 200, or the telephone line 300 connected to the power line modem 700. Here, the short range communication signal is transmitted and received between the user terminal 500 and the power line modem 700, and the electrical signal is transmitted through the coaxial cable 100, the power line 200, and the telephone line 300.

The telephone 600 is electrically connected to the telephone line 300 through the power line modem 700, and outputs a voice signal supplied through the telephone line 300 and the power line modem 700 to the outside, and outputs the input voice signal. Output to power line modem 700.

The power line modem 700 transmits the broadcast signal received through the coaxial cable 100 to the television receiver 400. Here, the short-range communication signal transmitted from the user terminal 500 or another user terminal is blocked from being supplied to the television receiver 400, thereby preventing the image quality of the television receiver 400 from being degraded by the short-range communication signal.

The power line modem 700 converts a short range communication signal received from the user terminal 500 into an electrical signal and transmits the electrical signal to the coaxial cable 100, the power line 200, and the telephone line 300. On the contrary, the power line modem 700 converts a short-range communication signal transmitted from another user terminal (not shown) other than the user terminal 500 into an electrical signal by another power line modem (not shown), thereby coaxial cable 100, When received through the power line 200 and the telephone line 300, the power line modem 700 is the best local area communication among the coaxial cable 100, the power line 200, and the short range communication signals received through the telephone line 300. The signal is selected and transmitted to the user terminal 500. At this time, the power line modem 700 is a communication signal suitable for the user terminal 500 to the optimum short-range communication signal selected from the short-range communication signals received through the coaxial cable 100, the power line 200, and the telephone line 300. The conversion is transmitted to the user terminal 500. Here, the other power line modem according to the present invention, the same as the power line modem 700.

The power line modem 700 transmits a voice signal received through the telephone line 300 to the telephone 600. Here, the short-range communication signal transmitted from the user terminal 500 or another user terminal is blocked from being supplied to the phone 600 and at the same time, the noise generated by the short-range communication signal and / or the broadcast signal is removed and the phone 600 is removed. Do not generate noise on).

2 is a schematic diagram showing an extended configuration of a short-range communication system according to an embodiment of the present invention.

As shown in FIG. 2, a plurality of power line modems 700, 700-1 to 700-n are connected to the coaxial cable 100, the power line 200, and the telephone line 300 to transmit a short range communication signal. . Here, the plurality of power line modems 700-1 to 700-n have the same configuration and function as the power line modem 700 shown in FIG.

The power line modem 700-1 is connected to a user terminal 500-1 for performing short range communication, and a television receiver 400-1 and / or a telephone 600-1 are connected to the power line modem 700-1.

The power line modem 700-n is connected to a user terminal 500-n for performing near field communication, and a television receiver 400-n and / or a telephone 600-n is connected.

Similarly, power line modems 700-2 through 700- (n-1) are also connected to a user terminal (not shown) for performing near field communication, and a television receiver (not shown) and / or telephone (not shown) Is connected.

3 is a configuration diagram of a power line modem having multiple functions according to an embodiment of the present invention, showing a detailed configuration of the power line modem shown in FIG.

Referring to FIG. 3, the power line modem 700 of the present invention includes a band filter 710 for filtering an applied signal and passing only a broadcast signal supplied through the coaxial cable 100 and outputting the signal to the television receiver 400. And converting the optimal short distance communication electrical signal selected from the short distance communication electrical signals supplied through the coaxial cable, the power line 200, and the telephone line 300 into a data signal and supplying the data to the user terminal 500, and the user terminal 500. A signal processor 720 for converting the data signal supplied from the signal into a short distance communication electric signal, and filtering the applied signal to remove noise and passing only the voice signal transmitted through the telephone line 300 to the telephone 600. A noise filter 730 for outputting the voice signal output from the telephone 600 and a broadcast signal transmitted through the coaxial cable 100 to the band filter 710, and a coaxial cable, The near field communication electrical signal supplied through the power line 200 and the telephone line 300 is selected and coupled to the signal processor 720, and then converted to the near field communication by the signal processor 720. The electrical signal is transmitted through the coaxial cable, the power line 200, and the telephone line 300, the voice signal transmitted through the telephone line 300 is coupled to the noise filter 730, and passed through the noise filter 730 The coupling unit 740 transmits a voice signal to the telephone line 300.

The power line modem 700 of the present invention includes a first connection port 750-1 for connecting the coaxial cable 100, a second connection port 750-2 for connecting the telephone line 300, and a television set. Third connection port 750-3 for connecting the receiver 400, fourth connection port 750-4 for connecting the user terminal 500, and fifth connection for connecting the telephone 600. A port 750-5 and a plug 760 for connecting the power line 200 are provided. Here, the plug 760 is connected to the power line 200 through an outlet (not shown).

The band pass filter 710 filters the signal supplied from the coupling unit 710 to pass only the broadcast signal supplied through the coaxial cable 100, and the electric signal and / or voice signal for short range communication other than the broadcast signal are received from the television receiver. It is blocked from being supplied to the 400, and the image quality of the television receiver 400 is prevented from being degraded by the electric signal and / or the audio signal for the short range communication. Here, the broadcast signal passing through the band pass filter 710 is supplied to the television receiver 400 through the third connection port 750-3.

The band filter 710 supplies only the broadcast signal to the television receiver 400 and prevents the image quality of the television receiver 400 from being deteriorated by the electric signal for short range communication. Thus, the power line modem 700 of the present invention uses a coaxial cable ( Through 100) it is possible to transmit the electrical signal for short-range communication.

The signal processor 720 converts the optimum short-range communication electric signal selected through the coupling unit 740 into a short-range communication digital signal, and converts the digital signal output from the user terminal 500 into the short-range communication digital signal for short-range communication. The first signal converter 721 for converting the electric signal and the digital signal for short-range communication converted by the first signal converter 721 into a data signal, and converts the data signal output from the user terminal 500 The second signal converter 722 converting the short-range communication digital signal to the first signal converter 721 and the digital signal converted by the second signal converter 722 are connected to the user terminal 500. And a short-range communication interface converted by the first signal converter 721 and an interface 723 for connecting the data signal output from the user terminal 500 to the second signal converter 722. It amplifies gisinho and a line driver 724 which outputs to the coupling portion 740.

The first signal converter 721 is selected by the coupling unit 740, the optimum short-range communication electrical signal from the coaxial cable, the power line 200, and the short-range communication electrical signals supplied through the telephone line 300 The selected short range communication electrical signal is converted into a short range communication digital signal and output to the second signal converter 722. The first signal converter 721 converts the digital signal output from the user terminal 500 into a digital signal for short-range communication through the second signal converter 722 and inputs the digital signal for short-range communication. The signal is converted into an electrical signal and output to the line driver 724.

The second signal converter 722 converts the short-range communication digital signal converted by the first signal converter 721 into a data signal and outputs the data signal to the interface 723. When the data signal output from the user terminal 500 is input through the interface 723, the second signal converter 722 converts the data signal into a digital signal for short-range communication and converts the first signal into a first signal converter 721. Will output

The interface 723 connects the digital signal converted by the second signal converter 722 to the user terminal 500 through the fourth connection port 750-4. When the data signal output from the user terminal 500 is input through the second connection port 750-4, the interface 723 connects the data signal to the second signal converter 722.

The line driver 724 amplifies the short range communication electrical signal converted by the first signal converter 721 to have a sufficient signal strength and outputs the converted signal to the coupling unit 740.

The noise filter 730 filters the signal applied through the coupling unit 740 to remove noise and simultaneously passes only the voice signal transmitted through the telephone line 300. Here, the voice signal passing through the noise filter 730 is transmitted to the phone 600 through the fifth connection port 750-5. When the voice signal output from the phone 600 is input through the fifth access port 750-5, the noise filter 730 filters the voice signal and outputs the voice signal to the coupling unit 740.

As such, the noise filter 730 supplies only the voice signal supplied through the phone line 730 to the phone 600 and removes the noise to prevent the voice quality from deteriorating. Thus, the power line modem 700 of the present invention uses the phone line 300. ) Can transmit electrical signals for local area communication.

When the broadcast signal transmitted through the coaxial cable 100 is input through the first access port 750-1, the coupling unit 740 couples the broadcast signal to the band filter 710.

The coupling unit 740 selects an optimal short-range communication electrical signal from the short-range communication electrical signals supplied through the coaxial cable, the power line 200, and the telephone line 300, and then selects the first signal converter of the signal processor 720. 721). In addition, the coupling unit 740 transmits the short-range communication electric signal output from the line driver 724 of the signal processor 720 to the first connection port 750-1, the plug 760, and the second connection port 750-. 2) through the coaxial cable, power line 200, and telephone line 300, respectively.

When the voice signal transmitted through the telephone line 300 is input through the second connection port 750-2, the coupling unit 740 couples the voice signal to the noise filter 730. Then, the coupling unit 740 transmits the voice signal output from the phone 600 to the noise filter 730, and transmits the voice signal to the telephone line 300 through the second connection port 750-2. .

As such, the coupling unit 740 selects an optimal short-range communication electrical signal from the coaxial cable, the power line 200, and the short-range communication electrical signals supplied through the telephone line 300, and supplies the selected short-range communication electrical signal to the user terminal 500. Due to the power consumption of the electronic devices (not shown) connected to the power line 200, the electrical signal for short-range communication having the attenuated signal strength is prevented from being transmitted to the user terminal 500. That is, the present invention selects the optimal short-range communication electrical signal from the coaxial cable, the power line 200, and the short-range communication electrical signals supplied through the telephone line 300 to supply to the user terminal 500, the power line 200 It is possible to provide the best local area communication quality compared to the case of performing local area communication using bays.

In addition, the present invention may improve the usability of the coaxial cable 100 and the telephone line 300 by performing short-range communication using all of the coaxial cable 100, the power line 200, and the telephone line 300.

4 is a perspective view of a power line modem with multiple functions according to an embodiment of the present invention.

As shown in Figure 4, the power line modem 700 according to an embodiment of the present invention, the first connection port 750-1 for connecting the coaxial cable 100, and the telephone line 300 to connect A second connection port 750-2 for connecting a third connection port 750-3 for connecting the television receiver 400 and a fourth connection port 750-4 for connecting the user terminal 500. And a fifth connection port 750-5 for connecting the telephone 600, and a plug 760 for connecting the power line 200.

The power line modem 700 performs near field communication through the coaxial cable 100, the power line 200, and the telephone line 300. That is, the power line modem 700 according to an embodiment of the present invention includes a band filter 710, a signal processor 720, a noise filter 730, and a coupling unit 740.

5 is a perspective view of a power line modem with multiple functions according to another embodiment of the present invention.

As shown in FIG. 5, the power line modem 700 according to another embodiment of the present invention connects a first connection port 750-1 and a television receiver 400 to connect a coaxial cable 100. And a third connection port 750-3, a fourth connection port 750-4 for connecting the user terminal 500, and a plug 760 for connecting the power line 200.

The power line modem 700 performs near field communication through the coaxial cable 100 and the power line 200. That is, the power line modem 700 according to another embodiment of the present invention includes a band filter 710, a signal processor 720, and a coupling unit 740.

The short-range communication system of the present invention to which the power line modem according to another embodiment of the present invention is applied does not include the telephone line 300 and the telephone 600.

6 is a perspective view of a power line modem with multiple functions according to another embodiment of the present invention.

As shown in FIG. 6, the power line modem 700 according to another embodiment of the present invention connects the second connection port 750-2 for connecting the telephone line 300 and the user terminal 500. And a fourth connection port 750-4, a fifth connection port 750-5 for connecting the phone 600, and a plug 760 for connecting the power line 200.

The power line modem 700 performs near field communication through the power line 200 and the telephone line 300. That is, the power line modem 700 according to another embodiment of the present invention includes a signal processor 720, a noise filter 730, and a coupling unit 740.

The short-range communication system of the present invention to which the power line modem according to another embodiment of the present invention is applied also does not include the coaxial cable 100 and the television receiver 400.

In addition, the power line modem of the present invention can perform short-range communication using not only coaxial cables, telephone lines, power lines, LAN lines, but all signal lines made of twisted pairs. As an example, the lines usable for the power line modem of the present invention include RS-232, 485, 422, and video lines.

The power line modem of the present invention can be applied to the communication system using the door phone of each home and the common entrance management system of apartments, and can also be applied to equipment or automobiles used outside the home or building.

Although the technical spirit of the present invention has been described in detail according to the above-described preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

1 is a schematic diagram of a short-range communication system using a power line modem having multiple functions according to an embodiment of the present invention.

2 is a schematic diagram showing an extended configuration of a short-range communication system according to an embodiment of the present invention.

3 is a block diagram of a power line modem having multiple functions according to an embodiment of the present invention.

4 is a perspective view of a power line modem with multiple functions according to an embodiment of the present invention.

5 is a perspective view of a power line modem with multiple functions according to another embodiment of the present invention.

6 is a perspective view of a power line modem with multiple functions according to another embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: coaxial cable 200: power line

300: telephone line 400: TV receiver

500: user terminal 600: telephone

700: power line modem 710: band filter

720: signal processor 721: first signal converter

722: second signal converter 723: interface

724: line driver 730: noise filter

740: coupling part

750-1 to 750-5: first to fifth connection ports

760: plug

Claims (18)

Connecting means for connecting a coaxial cable, a power line, a telephone line, a television receiver, a user terminal, and a telephone; A band filter for filtering an applied signal and supplying only a broadcast signal supplied through the coaxial cable to the television receiver; The short-range communication electrical signal selected from the coaxial cable, the power line, and the short-range communication electrical signals supplied through the telephone line is converted into a data signal and supplied to the user terminal, and the short-range data signal supplied from the user terminal A signal processor converting the communication electrical signal; A noise filter for filtering the applied signal to remove noise and at the same time supplying only the voice signal transmitted through the telephone line to the telephone, and passing the voice signal supplied from the telephone; And Coupling the broadcast signal transmitted through the coaxial cable to the band pass filter, and selecting an optimum short range communication electrical signal from the short distance communication electrical signals supplied through the coaxial cable, the power line, and the telephone line; And transmit the short range communication electrical signal converted by the signal processor through the coaxial cable, the power line, and the telephone line, and couple the voice signal transmitted through the telephone line to the noise filter. And a coupling unit for transmitting the voice signal passing through the noise filter through the telephone line. The method of claim 1, wherein the connecting means, A first connection port for connecting the coaxial cable; A second connection port for connecting the telephone line; A third connection port for connecting the television receiver; A fourth connection port for connecting the user terminal; A fifth connection port for connecting the telephone; And And a plug for connecting the power line. The method according to claim 1 or 2, wherein the signal processor, A first signal converting unit for converting the optimal short-range communication electric signal selected through the coupling unit into a short-range communication digital signal and converting the short-range communication digital signal converted from the digital signal output from the user terminal into a short-range communication electric signal; ; A second signal converter converting the digital signal for short-range communication converted by the first signal converter into a data signal, converting the data signal output from the user terminal into a digital signal for short-range communication, and outputting the digital signal to the first signal converter; ; An interface for connecting the digital signal converted by the second signal converter to the user terminal and connecting the data signal output from the user terminal to the second signal converter; And And a line driver for amplifying the short range communication electrical signal converted by the first signal converting unit and outputting the amplified electrical signal to the coupling unit. Connecting means for connecting a coaxial cable, a power line, a television receiver, and a user terminal; A band filter for filtering an applied signal and supplying only a broadcast signal supplied through the coaxial cable to the television receiver; The optimal short-range communication electrical signal selected from the coaxial cable and the short-range communication electrical signals supplied through the power line is converted into a data signal and supplied to the user terminal, and the data signal supplied from the user terminal is converted into a short-range communication electrical signal. A signal processor for converting; And Coupling the broadcast signal transmitted through the coaxial cable to the band pass filter, selecting an optimum short range communication electrical signal from the short distance communication electrical signals supplied through the coaxial cable and the power line, and coupling the signal to the signal processor; And a coupling unit which transmits the electrical signal for short-range communication converted by the signal processor through the coaxial cable and the power line. The method of claim 4, wherein the connecting means, A first connection port for connecting the coaxial cable; A third connection port for connecting the television receiver; A fourth connection port for connecting the user terminal; And And a plug for connecting the power line. The method according to claim 4 or 5, wherein the signal processor, A first signal converting unit for converting the optimal short-range communication electric signal selected through the coupling unit into a short-range communication digital signal and converting the short-range communication digital signal converted from the digital signal output from the user terminal into a short-range communication electric signal; ; A second signal converter converting the digital signal for short-range communication converted by the first signal converter into a data signal, converting the data signal output from the user terminal into a digital signal for short-range communication, and outputting the digital signal to the first signal converter; ; An interface for connecting the digital signal converted by the second signal converter to the user terminal and connecting the data signal output from the user terminal to the second signal converter; And And a line driver for amplifying the short range communication electrical signal converted by the first signal converting unit and outputting the amplified electrical signal to the coupling unit. Connection means for connecting a power line, a telephone line, a user terminal, and a telephone; Converts an optimal short-range communication electrical signal selected from the short-range communication electrical signals supplied through the power line and the telephone line into a data signal and supplies the data signal to the user terminal, and converts the data signal supplied from the user terminal into a short-range communication electrical signal. A signal processor; A noise filter for filtering the applied signal to remove noise and at the same time supplying only the voice signal transmitted through the telephone line to the telephone, and passing the voice signal supplied from the telephone; And Selecting an optimum short-range communication electrical signal among the electrical signal for short-range communication supplied through the power line and the telephone line and coupling it to the signal processor, and converts the short-range electrical signal converted by the signal processor to the power line and the telephone line. And a coupling unit for transmitting the voice signal transmitted through the telephone line to the noise filter, and transmitting the voice signal passing through the noise filter through the telephone line. Powerline modem. The method of claim 7, wherein the connecting means, A second connection port for connecting the telephone line; A fourth connection port for connecting the user terminal; A fifth connection port for connecting the telephone; And And a plug for connecting the power line. The method of claim 7 or 8, wherein the signal processor, A first signal converting unit for converting the optimal short-range communication electric signal selected through the coupling unit into a short-range communication digital signal and converting the short-range communication digital signal converted from the digital signal output from the user terminal into a short-range communication electric signal; ; A second signal converter converting the digital signal for short-range communication converted by the first signal converter into a data signal, converting the data signal output from the user terminal into a digital signal for short-range communication, and outputting the digital signal to the first signal converter; ; An interface for connecting the digital signal converted by the second signal converter to the user terminal and connecting the data signal output from the user terminal to the second signal converter; And And a line driver for amplifying the short range communication electrical signal converted by the first signal converting unit and outputting the amplified electrical signal to the coupling unit. A coaxial cable for transmitting a broadcast signal and an electric signal for near field communication; A power line for supplying power and for transmitting an electrical signal for short-range communication; Telephone lines for transmitting voice signals and electrical signals for local area communication; A plurality of user terminals for performing local area communication; And Connected to the coaxial cable, the power line, and the telephone line, connected to any one of the plurality of user terminals, and converting a data signal output from a user terminal connected with the user into an electrical signal for short-range communication; A user connected to the user by transmitting an optimal short-range communication electrical signal to a data signal among the coaxial cable, the power line, and the telephone line, and converting the optimal short-range communication electrical signal among the coaxial cable, the power line, and the electrical signals transmitted through the telephone line. A short range communication system using a power line modem, comprising: a plurality of power line modems to transmit to the terminal. 11. The method of claim 10, wherein the plurality of power line modems, respectively, Connection means for connecting the coaxial cable, the power line, the telephone line, a television receiver, a telephone, and a user terminal connected with itself among the plurality of user terminals; A band filter for filtering an applied signal and supplying only a broadcast signal supplied through the coaxial cable to the television receiver; The short-range communication electrical signal selected from the coaxial cable, the power line, and the short-range communication electrical signals supplied through the telephone line is converted into a data signal and supplied to the user terminal connected to the user. A signal processor for converting the supplied data signal into an electrical signal for short range communication; A noise filter for filtering the applied signal to remove noise and at the same time supplying only the voice signal transmitted through the telephone line to the telephone, and passing the voice signal supplied from the telephone; And Coupling the broadcast signal transmitted through the coaxial cable to the band pass filter, and selecting an optimum short range communication electrical signal from the short distance communication electrical signals supplied through the coaxial cable, the power line, and the telephone line; And transmit the short range communication electrical signal converted by the signal processor through the coaxial cable, the power line, and the telephone line, and couple the voice signal transmitted through the telephone line to the noise filter. And a coupling unit for transmitting the voice signal passing through the noise filter through the telephone line. The method of claim 11, wherein the signal processor, A first signal for converting an electric signal for short-range communication selected through the coupling unit into a digital signal for short-range communication, and converting a digital signal for short-range communication converted from a digital signal output from a user terminal connected thereto to a short-range communication electrical signal; A signal converter; A second signal for converting the digital signal for short-range communication converted by the first signal converter into a data signal, converting the data signal output from the user terminal connected to the digital signal to the digital signal for short-range communication, and outputting the digital signal to the first signal converter; A signal converter; An interface for connecting the digital signal converted by the second signal converter to a user terminal connected thereto and for connecting a data signal output from the user terminal connected to the second signal converter; And And a line driver for amplifying the short range communication electrical signal converted by the first signal converter and outputting the amplified electrical signal to the coupling unit. A coaxial cable for transmitting a broadcast signal and an electric signal for near field communication; A power line for supplying power and for transmitting an electrical signal for short-range communication; A plurality of user terminals for performing local area communication; And The coaxial cable is connected to the coaxial cable and the power line, and is connected to any one of the plurality of user terminals, and converts a data signal output from a user terminal connected to the coaxial cable into an electrical signal for short range communication. A plurality of power line modems for transmitting to a power line and converting an optimal short distance communication electrical signal among data signals for short-range communication transmitted through the coaxial cable and the power line to a data signal and transmitting the data signal to a user terminal connected thereto. Short-range communication system using a power line modem, characterized in that. The method of claim 13, wherein the plurality of powerline modems, respectively Connection means for connecting said coaxial cable, said power line, a television receiver, and a user terminal connected with itself among said plurality of user terminals; A band filter for filtering an applied signal and supplying only a broadcast signal supplied through the coaxial cable to the television receiver; The short-range communication electrical signal selected from the coaxial cable and the short-range communication electrical signals supplied through the power line is converted into a data signal and supplied to the user terminal connected to the self, and the data signal supplied from the user terminal connected to the self. A signal processor converting the signal into a short range communication electrical signal; And Coupling the broadcast signal transmitted through the coaxial cable to the band pass filter, selecting an optimum short range communication electrical signal from the short distance communication electrical signals supplied through the coaxial cable and the power line, and coupling the signal to the signal processor; And a coupling unit which transmits the electrical signal for short-range communication converted by the signal processor through the coaxial cable and the power line. The method of claim 14, wherein the signal processor, A first signal for converting an electric signal for short-range communication selected through the coupling unit into a digital signal for short-range communication, and converting a digital signal for short-range communication converted from a digital signal output from a user terminal connected thereto to a short-range communication electrical signal; A signal converter; A second signal for converting the digital signal for short-range communication converted by the first signal converter into a data signal, converting the data signal output from the user terminal connected to the digital signal to the digital signal for short-range communication, and outputting the digital signal to the first signal converter; A signal converter; An interface for connecting the digital signal converted by the second signal converter to a user terminal connected thereto and for connecting a data signal output from the user terminal connected to the second signal converter; And And a line driver for amplifying the short range communication electrical signal converted by the first signal converter and outputting the amplified electrical signal to the coupling unit. A power line for supplying power and for transmitting an electrical signal for short-range communication; Telephone lines for transmitting voice signals and electrical signals for local area communication; A plurality of user terminals for performing local area communication; And It is connected to the power line and the telephone line, and is connected to any one of the plurality of user terminals, and converts the data signal output from the user terminal connected with itself into an electrical signal for short-range communication to the power line and the telephone line And a plurality of power line modems for converting an optimum short distance communication electric signal from among the short distance communication electric signals transmitted through the power line and the telephone line into a data signal and transmitting the data signal to a user terminal connected thereto. A near field communication system using a power line modem. 17. The method of claim 16, wherein the plurality of powerline modems, respectively, Connecting means for connecting the power line, the telephone line, a telephone, and a user terminal connected with the user among the plurality of user terminals; Converts an optimal short-range communication electrical signal selected from among the short-range communication electrical signals supplied through the power line and the telephone line into a data signal and supplies the data signal to a user terminal connected to the user; A signal processor for converting an electric signal for near field communication; And Selecting an optimum short-range communication electrical signal among the electrical signal for short-range communication supplied through the power line and the telephone line and coupling it to the signal processor, and converts the short-range electrical signal converted by the signal processor to the power line and the telephone line. Short-range communication system using a power line modem comprising a; coupling unit for transmitting through. The method of claim 17, wherein the signal processor, A first signal for converting an electric signal for short-range communication selected through the coupling unit into a digital signal for short-range communication, and converting a digital signal for short-range communication converted from a digital signal output from a user terminal connected thereto to a short-range communication electrical signal; A signal converter; A second signal for converting the digital signal for short-range communication converted by the first signal converter into a data signal, converting the data signal output from the user terminal connected to the digital signal to the digital signal for short-range communication, and outputting the digital signal to the first signal converter; A signal converter; An interface for connecting the digital signal converted by the second signal converter to a user terminal connected thereto and for connecting a data signal output from the user terminal connected to the second signal converter; And And a line driver for amplifying the short range communication electrical signal converted by the first signal converter and outputting the amplified electrical signal to the coupling unit.

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