• 专利附录
  • 专利说明
  • 权利要求
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  • 优先权
    • 专利摘要:
    The present invention relates to a power line telephone communication system using a low voltage distribution network, comprising: a power line communication telephone connected to each power line of a low voltage distribution network for supplying electricity between consumers and performing telephone communication using a frequency division scheme; The switching switching of the telephone signal input and output from the power line communication telephone via the power line is constituted by a power line telephone exchange. The power line telephony system using the low voltage distribution network as described above connects a power line telephone to each customer through the low voltage distribution network, and then connects the power line telephone to the power line telephone exchange to which the telephone station is connected. By using existing consumer power line, many users can make a telephone call at the same time as well as install and filter and amplify the noise in the power line included in the transmission signal. Therefore, long distance transmission of telephone signal is possible accordingly. In addition, when the distance between the customer connected via the power line telephone switch and the power line is far, a repeater is installed to perform long distance communication, thereby significantly improving the communication reliability of the system.
    公开号:KR19990060047A
    申请号:KR1019970080265
    申请日:1997-12-31
    公开日:1999-07-26
    发明作者:정범진；김진태；김봉철
    申请人:이기원；기인시스템 주식회사；
    IPC主号:
    专利说明:

    Power Line Telephone Communication System Using Low Voltage Distribution Network
    The present invention relates to a power line telephone communication system using a low voltage distribution network, and in particular, by connecting a power line communication telephone to each customer through a low voltage distribution network, and then connecting the power line communication telephone to a power line telephone switch to which a telephone station is connected. The present invention relates to a power line telephony communication system using a low-voltage distribution network that allows multiple users to make telephone calls simultaneously using existing consumer power lines without installing a telephone line.
    In general, a power line communication system refers to a system that communicates by using a power line installed in a customer, for example, a local area network using power line communication is used for home automation or factory automation. .
    Then, the power line telephone system using the above-described conventional power line is a telephone connected between the customer's external telephone line 70 and the power line 71 and input / output between the external telephone line 70 and the power line 71 as shown in FIG. A first power line communication device 72 for modulating and demodulating a signal, and a second power line communication device for demodulating and demodulating a telephone signal connected between the power line 71 and the telephone 73 and input / output between the power line 71 and the telephone 73 ( 74).
    Here, the telephone 73 of the consumer is connected to one end of the second power line communication device 74.
    On the other hand, referring to the operation of the conventional power line telephone system as described above, first, when the user wants to make a call using the power line, when the user makes a call in the usual manner, the telephone signal of the telephone 73 is a second power line communication device ( 74). Then, the second power line telephone 74 filters an input telephone signal, for example, a telephone signal from 0 Hz to 3 KHz, and then modulates the telephone signal of 3 KHz through a power line 71. Input to the power line communicator 72. The first power line communication device 72 demodulates the telephone signal inputted through the power line 71 again and emits it to the outside through the external telephone line 70. On the other hand, the telephone signal input from the external telephone line 70 to the first power line communicator 72 is modulated by the first power line communicator 72. Then, the telephone signal modulated by the first power line communicator 72 is input to the second power line communicator 74 via the power line 71, and accordingly, the second power line communicator 72 demodulates the input telephone signal. Input to telephone 73. Therefore, the telephone 73 makes a normal telephone call using this input telephone signal.
    However, in the conventional power line telephone system as described above, since the existing telephone line 70 must be used, in order to make a power line communication telephone with another customer, a telephone line must be separately installed, and only one user can make a call on the same power line. This significantly reduced the functionality of the system. In addition, even when power line communication is performed using a power line communication line, there are problems that long-distance transmission is difficult due to various loads connected to the power line, noise on the power line, and a complicated distribution network structure.
    Therefore, the present invention was invented to solve the above problems, by connecting the power line communication telephone to each customer through the low-voltage distribution network and by connecting the power line communication telephone to the power line telephone switch connected to the telephone station, By using existing consumer power lines, many users can make telephone calls simultaneously, as well as filter and amplify the noise in the power lines included in the transmission signals. Its purpose is to provide a power line telephony system using this low voltage distribution network.
    Another object of the present invention is to install a repeater when the distance between the customer connected via the power line telephone switchboard and the power line is to perform a long distance communication power line using a low-voltage distribution network that can significantly improve the communication reliability of the system accordingly To provide a telephony system.
    The present invention for achieving the above object is a power line communication telephone connected to each power line of the low-voltage distribution network for supplying electricity between consumers and performing a telephone communication using a frequency division method, and the power line from the power line communication telephone Switching the telephone signal input and output via the switch is characterized in that it is configured as a power line telephone exchange.
    1 is an explanatory diagram illustrating a conventional power line communication system.
    2 is an explanatory diagram illustrating a low voltage distribution network applied to the present invention.
    3 is a convex diagram of a power line telephony communication system of the present invention;
    4 is a convex diagram illustrating an FM handset of the signal repeater of FIG.
    5 is an explanatory diagram illustrating an embodiment of a signal separation filter of the signal repeater of FIG. 3.
    Explanation of symbols on the main parts of the drawings
    1: power line 2: power line communication telephone
    3: power line telephone switchboard 4: signal repeater
    5: telephone station 6: input signal processing unit
    7: FM demodulator 8: Electric / Voice Converter
    9: handset circuit unit 10: voice / electric converter
    11: FM demodulator 12: signal amplifier
    13: comparator 14: full bridge power amplifier
    15: low pass filter 16: first FM handset
    17: second FM handset 18: signal separation filter
    19: Input filter 20: FM modem
    21: power line communication amplifier
    Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
    The present invention is connected to each power line 1 of the low-voltage distribution network for supplying electricity between consumers as shown in FIG. 2 and using frequency division multiplexing, for example, 10 [KHZ] -450 [ KHZ] power line communication telephone (2) for performing telephone communication using the band, and switching the telephone signal input and output via the power line (1) from the power line communication telephone (2) to the power line telephone exchange (3). It is composed. In addition, a signal repeater 4 is connected between the power line exchanger 3 and the power line communication telephone 2 installed at each customer through the power line 1 to filter and amplify and amplify the telephone signal input and output.
    Here, the power line telephone switchboard 3 can usually be installed on the telephone pole, and one end of the power line telephone switchboard 3 is connected to the telephone station 5 through a dedicated communication line such as an optical cable or a coaxial cable. In addition, the power line telephone switchboard 3 serves to manage the power line telephones of each home and constitutes a power line local loop.
    The power line communication telephone 2 filters the telephone signal frequency input through the power line 1 to a set frequency band, for example, 10 [KHZ] -450 [KHZ], as shown in FIG. An input signal processor (6) for scanning the signal frequency band to select an optimal channel, an FM demodulator (7) for frequency demodulating the telephone signal output from the input signal processor (6), and from the FM demodulator (7) An electric / voice converter 8 for converting the outputted electric telephone signal into a voice signal, and a handset circuit unit 9 for processing a predetermined signal from the voice signal output from the electric / voice signal converter 8 and the user's voice signal. ), A voice / electric converter 10 that converts and outputs a user's voice signal input from the handset circuit unit 9 into an electric signal, and a voice signal converted by the voice / electric converter 10 electrically. FM modulator 11 for frequency modulation and FM modulation 11 is configured by a frequency-modulated audio signal by a predetermined band for example, 450 [KHZ] signal amplifier 12 which amplifies filter signals outside of the band.
    Here, the signal amplifier 12 includes a comparator 13 for pulse-shaping a sinusoidal pulse form by comparing an analog voice frequency signal input from the FM modulator 11 with a reference value, and the comparator. The full bridge power amplifier 14 for switching and amplifying the pulsed call signal by (13), and the call signal of the previous bridge power amplifier 14, other than a predetermined frequency band, for example, 450 [KHZ] It consists of a low pass filter 15 for filtering the signal of the output.
    In addition, the signal repeater 4 is connected between the first and second FM handsets 16 and 17, which modulate or demodulate the incoming call signal in both directions, and the first and second FM handsets 16 and 17. It is composed of a signal separation filter 18 to block the input and output of the call signal between the first and second FM handsets 16 and 17. In addition, the first and second FM handsets 16 and 17 may filter the call signal input from the power line 1 as shown in FIG. 4 by a predetermined frequency band, for example, outside the 10-450 [KHZ] band. 19), the FM modem 20 for modulating or demodulating the call signal input from the input filter 19, and the power line communication for amplifying and demodulating the call signal demodulated from the FM modem 20 to the power line 1; It consists of an amplifier 21.
    Here, the first and second FM handsets 16 and 17 configured as described above demodulate the signals modulated by the first FM handset 16 in the second FM handset 17, while the second FM handsets are used. The signal modulated at 17 has a two-way signal processing operation for demodulating the first FM handset 16.
    As the signal separation filter 18 of the signal repeater 4, an LC filter may be used as shown in FIG. 5, and a filter surface capable of separating signals between the first and second handsets 16 and 17. Any can be used.
    Here, the full bridge power amplifier 14 is a switching amplifier is used, the conventional linear amplifier can not make the output resistance to 0 because it operates in the active region (Active Region) of the transistor (Transistor), The switching amplifier used operates in the saturation region or cut-off region of the transistor, making the output resistance nearly zero, resulting in almost no voltage loss at the output stage.
    Next, the operation of the present invention having the above configuration will be described.
    In the operation of the present invention, first, when a user wants to make a telephone call using the power line 1, when the user makes a power line communication phone 2 installed in each customer in a conventional manner, the user's voice signal is transmitted to the handset circuit unit ( 9) is input to the voice / electric converter 10 through. The voice / electric converter 10 converts the input voice signal of the user into an electrical call signal, for example, 3 [KHZ] baseband signals and inputs the signal to the FM modulator 11. Then, the call signal input from the FM modulator 11 is frequency-modulated and frequency-divided and input to the comparator 13 of the signal amplifier 12. Accordingly, the comparison unit 13 compares the modulated signal input from the FM modulator 11 according to a predetermined reference value, pulses the sine wave, and inputs the same to the entire bridge power amplifier 14. The previous bridge power amplifier 14 switches the pulse output of the input comparator 13 to the low pass filter 15. At this time, the call signal amplified by the previous bridge power amplifier 14 includes a large current. In addition, the low pass filter 15 filters the frequency signal other than a predetermined band, for example, 450 [KHZ] band, and transmits the call signal input from the all-bridge power amplifier 14 and then emits it through the power line 1. Then, the call signal emitted through the power line 3 is transmitted to the telephone station 5 by switching of the power line telephone switch 3 to make a normal telephone call or to a power line communication telephone 2 connected to another customer. You can enter and make a phone call.
    Here, the call signal emitted through the power line 1 is switched by the signal amplifier 12, so that long-distance transmission is possible.
    On the other hand, when a call signal is inputted from the telephone station 5 or another customer's telephone to the power line telephone switchboard 3, the power line telephone exchange 3 converts the input call signal of the power line communication telephone 2 of the selected specific consumer. It is input to the input signal processor 6. In addition, the input signal processor 6 band-filters the call signal input through the power line 1, and removes frequency signals other than the 450 [KHZ] band and inputs them to the FM demodulator 7. At this time, the input signal processor 6 scans the telephone signal frequency band, selects an optimal channel, and connects it to the FM demodulator 7. Then, the FM demodulator 7 frequency demodulates the call signal of the input signal processing section 6 into a baseband signal and inputs the converted baseband call signal to the electric / voice converter 8. Accordingly, the electric / voice converter 8 converts the baseband call signal of the FM demodulator 7 into a voice signal and is emitted to the outside through the handset circuit unit 9.
    Here, the above description only describes the operation of one embodiment of frequency division, but the present invention is intended to allow multiple users to simultaneously receive telephone service on one power line using frequency division multiplexing. Therefore, in general, when a voice signal is transmitted using a frequency modulation method, a band of 25 to 30 [KHZ] is required, and the present invention system divides the 10 to 450 [KHZ] band into 25-30 [KHZ] as described above. Since the user can use the power line (1), a number of users can talk at the same time.
    However, in the power line communication as described above, since the low-voltage distribution network is complicated and long like a spider web, the output signal of the power line communication telephone 2 may not reach the power line telephone switch 3. However, in the present system, a signal repeater 4 is provided between the power line telephone switch 3 and the customer's power line communication telephone 2 so that communication between the power line telephone switch 3 and the power line communication telephone 2 is normally performed. To be executed.
    That is, when the call signal is input from the power line telephone switch 3 to the input filter 19 of the first FM handset 16, the input filter 19 sets the call signal input through the power line 1, for example, a band set. After filtering for a band other than 10-450 [KHZ], the signal is input to the FM modem 20. Then, the FM modem 20 demodulates the input call signal and inputs it to the FM modem 20 of the second FM handset 17. Accordingly, the FM modem 20 of the second FM handset 17 FM-modulates the demodulated call signal and inputs it to the power line communication amplifier 21. Then, the amplified modulated signal of the FM modem 20 inputted from the power line communication amplifier 21 is amplified and transmitted to the power line communication telephone 2 on the customer side through the power line 1 connected to the second FM handset 17 side. do.
    On the other hand, when a call signal is input from the power line communication telephone 2 installed on the consumer side to the input filter 19 of the second FM handset 17, the input filter 19 disconnects the power line 1 connected to the consumer side. The inputted call signal is filtered for a band other than the set band, for example, 10-450 [KHZ] and then input to the FM modem 20. Then, the FM modem 20 demodulates the input call signal and inputs it to the FM modem 20 of the first FM handset 16. Therefore, the FM modem 20 of the first FM handset 16 FM-modulates the demodulated call signal and inputs it to the power line communication amplifier 21. Then, the modulated signal of the FM modem 20 inputted from the power line communication amplifier 21 is amplified and transmitted to the power line telephone switch 3 through the power line 1 connected to the first FM handset 16 side. At this time, the signal separation filter 18 connected between the first and second FM handsets 16 and 17 passes power components of 60 [HZ], but blocks power line communication signals of 10 [KHZ] or more. 2 The communication signals of the FM handsets 16 and 17 are bidirectionally relayed without mutual interference.
    As described in the above description, the present invention connects a power line communication telephone to each customer through a low voltage distribution network, and then connects the power line communication telephone to a power line telephone exchange to which a telephone station is connected. By using the power line, a plurality of users can make a telephone call at the same time as well as filter and amplify the noise in the power line included in the transmission signal and transmit the remote signal accordingly. In addition, when the distance between the customer connected via the power line telephone switch and the power line is far, a repeater is installed to perform long distance communication, thereby improving the communication reliability of the system.
    权利要求:
    Claims (7)
    [1" claim-type="Currently amended] A power line communication telephone (2) connected to each power line (1) of a low-voltage distribution network for supplying electricity between consumers, and carrying out telephone communication by using a frequency division method; and a power line (1) from the power line communication telephone (2). Switching switching of the telephone signal input and output via the) is a power line telephone communication system using a low-voltage distribution network, characterized in that consisting of a power line telephone switch (3).
    [2" claim-type="Currently amended] The signal repeater (4) according to claim 1, characterized in that a signal repeater (4) is connected between the power line switch (3) and the power line communication telephone (2) to filter and amplify and relay a communication signal input and output via the power line (1). Power line telephone communication system using a low-voltage distribution network.
    [3" claim-type="Currently amended] 2. An input signal according to claim 1, wherein the power line communication telephone 2 filters the telephone signal frequency input through the power line 1 to a set frequency band and scans the filtered telephone signal frequency band to select an optimal channel. The processor 6, the FM demodulator 7 for frequency demodulating the telephone signal output from the input signal processor 6, and the electric / electrical converter for converting the electrical telephone signal output from the FM demodulator 7 into a voice signal. A voice converter 8, a handset circuit section 9 for constant signal processing of the voice signal output from the electric / voice signal converter 8 and the user's voice signal, and a user input from the handset circuit section 9 A voice / electric converter 10 for converting and outputting a voice signal into an electric signal, an FM modulator 11 for frequency-modulating the voice signal electrically converted by the voice / electric converter 10, and the FM modulator ( 11) Voice signal modulated by frequency A power line telephone communications system using a low-pressure distribution network, characterized in that consisting of a signal amplification unit 12 for amplifying and filtering the signal other than the predetermined bandwidth.
    [4" claim-type="Currently amended] 4. The signal amplifying unit (12) according to claim 3, wherein the signal amplifying unit (12) includes a comparing unit (13) for pulse-forming a sinusoidal pulse form by comparing analog audio frequency signals input from the FM modulator (11) with reference values, 13) a full bridge power amplifier 14 for switching and amplifying a pulsed call signal, and a low pass filter 15 for filtering and outputting a call signal of the previous bridge power amplifier 14 outside of a predetermined frequency band. Power line telephone communication system using a low-voltage distribution network, characterized in that consisting of.
    [5" claim-type="Currently amended] 5. The power line telephony communication system according to claim 4, wherein the full bridge power amplifier (14) is a switching amplifier.
    [6" claim-type="Currently amended] 3. The signal repeater (4) according to claim 2, wherein the signal repeater (4) is provided between the first and second FM handsets (16, 17) for modulating or demodulating the incoming call signal in both directions. And a signal separation filter (18) connected to the first and second FM handsets (16, 17) to block input and output of a call signal.
    [7" claim-type="Currently amended] 8. The first and second FM handsets 16 and 17 further include: an input filter 19 for filtering a call signal input from the power line 1 outside of a predetermined frequency band, and input from the input filter 19; A low-voltage multiplier comprising an FM modem 20 for modulating or demodulating the talk signal and a power line communication amplifier 21 for amplifying and demodulating the call signal demodulated from the FM modem 20 to the power line 1. Powerline Telephony System Using Outlook.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-12-31|Application filed by 이기원, 기인시스템 주식회사
    1997-12-31|Priority to KR1019970080265A
    1999-07-26|Publication of KR19990060047A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019970080265A|KR19990060047A|1997-12-31|1997-12-31|Power Line Telephone Communication System Using Low Voltage Distribution Network|
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