KR100627189B1 - Relay System Using Common Power in Wireless Communication Network - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a relay system using a power line in a wireless communication network.

2. The technical problem to be solved by the invention

An object of the present invention is to provide a relay system for relaying a signal using a power line to provide a service to a wireless communication terminal located in a radio shade area.

3. Summary of Solution to Invention

The present invention converts a high frequency signal received from a base station into an intermediate frequency signal and transmits the gain by controlling the gain according to the signal strength on the power line, separating the intermediate frequency signal from the power line, and converting the intermediate frequency signal into a high frequency signal. Relay means for controlling gain and transmitting the gain to the base station; The intermediate means separates the intermediate frequency signal carried on the power line and converts the signal into a high frequency signal, controls the gain and sends the gain to the wireless communication terminal, converts the high frequency signal received from the wireless communication terminal into the intermediate frequency signal and obtains the gain. A plurality of remote repeater means for controlling and transmitting on the power line to the repeater; A plurality of signal generating means for generating a signal according to a unique identifier (ID) set in said plurality of remote relay means and transmitting it through said power line; And gain control means for receiving a signal from each signal generating means through the power line and transmitting a gain control signal for compensating for the loss variation according to the length of the power line through the power line to the remote relay means.

4. Important uses of the invention

The present invention is used in a wireless communication network.

Repeater, Power Line, Modem, Intermediate Frequency

Description

Relay System Using Common Power in Wireless Communication Network             

1 is an exemplary view of a conventional optical relay system.

Figure 2 is an exemplary view of a conventional variable frequency relay system.

Figure 3 is an exemplary view of a conventional RF (Radio Frequency) relay system.

4 is an exemplary view of a relay system using a power line in a wireless communication network according to the present invention.

FIG. 5 is an exemplary view to which a relay system using the power line shown in FIG. 4 is applied.

FIG. 6 is an exemplary view in which the relay system using the power line shown in FIG. 4 is modified.

FIG. 7 is another exemplary diagram to which a relay system using the power line shown in FIG. 4 is applied.

8 is another exemplary diagram of a relay system using a power line in a wireless communication network according to the present invention;

9 is another exemplary diagram of a relay system using a power line in a wireless communication network according to the present invention;

* Explanation of symbols for the main parts of the drawings

40: donor repeater 42: remote repeater

402,408,424,430: Duplexer 404,426: Up-converter

406,428: Down Converter 411,433: RF Modem

410,432 Filter 412,434 Power supply

The present invention relates to a relay system of a wireless communication system, and more particularly, to a relay system for relaying signals using a power line to provide a service to a wireless communication terminal located in a radio shade area.

Here, the wireless communication system is a term including a mobile telephone system, a personal mobile communication system (PCS), a wireless data communication system, a next generation mobile communication system (IMT-2000), a frequency common communication system, and the like.

First, the conventional repeaters currently used for the radio shading area and the in-building service in the wireless communication system will be described as follows.

1 is an exemplary view of a conventional optical relay system.

The optical relay system is mainly used for the base station 10 and the optical repeater 18 to solve the radio shading area of the ground or underground, in a manner of communicating using the optical path. In this case, the communication method includes converting an RF signal into an optical signal and transmitting the optical signal to an optical path by an electrical to optical converter 12 of the base station 10. Electrical Converter (14) converts and reproduces an optical signal into an RF signal and amplifies it through the amplifier 16 and transmits it through an antenna.

However, the conventional optical relay system as shown in FIG. 1 has a high cost burden for the optical fiber rent, and requires expensive optical / electric converters and all / optical converters, resulting in high system prices, and moreover, radio shade areas. In the case of mountainous outback or island area, there is a problem that it is difficult to install optical line.

Figure 2 is an exemplary view of a conventional variable frequency relay system, showing a frequency conversion relay system.

This variable wave relay system is mainly used for terrestrial coverage expansion and radio wave shading. In this case, the base station 20 converts the used FA into another FA (for example, 1FA to 5FA) using the FA (Frequency Allocation) converter 22, and then repeats the FA from the relay 26 again. The converter 24 reproduces the original FA (5FA to 1FA).

However, the conventional variable wave relay system as described above has a problem in that an installation place is limited because line of sight (LOS) must be secured, and expensive equipment must be used when the link distance is long. .

3 is an exemplary view of a conventional RF (Radio Frequency) relay system.

This conventional RF relay system is mainly used to solve the radio shading area of the basement or tunnel. The communication method at this time is a method of using the link frequency between the base station 30 and the repeater 32 as the used FA frequency.

However, the conventional RF relay system as described above is limited on the ground because the isolation between antennas is secured, and the cost of the feeder or optical cable facility is higher than the equipment price when the radio shade area service such as underground or tunnel is serviced. Occupies, construction is also difficult construction, even if the building owner unallowed construction, construction period also has a problem that can not be ignored.

The present invention has been made to solve the above problems, and an object thereof is to provide a relay system for relaying a signal using a power line to provide a service to a wireless communication terminal located in a radio shade area.

In addition, an object of the present invention is to provide a relay system for relaying a signal using a power line (or coaxial cable) and a coupler to provide a service to a wireless communication terminal located in a radio shade area.

A first apparatus of the present invention for achieving the above object is a relay system for relaying a signal using a power line in a wireless communication network, converting a high frequency signal received from a base station into an intermediate frequency signal to be transmitted on the power line A repeater for separating the intermediate frequency signal from the power line, converting the intermediate frequency signal into a high frequency signal, and transmitting the same to the base station; And separating the intermediate frequency signal transmitted from the repeater to the power line, converting the intermediate frequency signal into a high frequency signal, and transmitting the converted high frequency signal to the wireless communication terminal, converting the high frequency signal received from the wireless communication terminal into an intermediate frequency signal, and placing the intermediate frequency signal on the power line. And a remote repeater for transmitting to the apparatus, wherein the repeater comprises: a first down converter for converting a high frequency signal received from the base station into an intermediate frequency signal of a band with less attenuation in the power line; A first up converter for converting the intermediate frequency signal transmitted from the remote repeater into a high frequency signal; First and second duplexers for duplexing transmission and reception signals at both sides of the first up converter and the first down converter; And a first filter for carrying the intermediate frequency signal converted by the first down converter on the power line and separating the intermediate frequency signal transmitted from the remote repeater from the commercial power line. A second down converter for converting a high frequency signal received from the wireless communication terminal into an intermediate frequency signal of a band with less attenuation in the power line; A second up converter for converting the intermediate frequency signal transmitted from the repeater into a high frequency signal; Third and fourth duplexers for duplexing transmission and reception signals at both sides of the second up converter and the second down converter; And a second filter configured to load the intermediate frequency signal converted by the second down converter onto the power line and transmit the intermediate frequency signal to the repeater, and to separate the intermediate frequency signal transmitted from the repeater from the commercial power line. do.

In addition, the second apparatus of the present invention, a relay system for relaying signals using a power line in a wireless communication network, comprising: a base station for carrying an intermediate frequency signal on the power line and transmitting the intermediate frequency signal from the power line; And separating the intermediate frequency signal transmitted from the base station to the power line, converting the intermediate frequency signal into a high frequency signal, and transmitting the converted high frequency signal to the wireless communication terminal, converting the high frequency signal received from the wireless communication terminal into an intermediate frequency signal, and loading the same into the power line. The base station includes: a first filter for transmitting an intermediate frequency signal on the power line and separating the intermediate frequency signal transmitted from the remote repeater from the power line; And a first duplexer for duplexing a transmission / reception signal at one side of the first filter, wherein the remote repeater converts a high frequency signal received from the wireless communication terminal into an intermediate frequency signal of a band with less attenuation in the power line. A first down converter for; A first up converter for converting the intermediate frequency signal transmitted from the base station into a high frequency signal; Second and third duplexers for duplexing transmission and reception signals at both sides of the first up converter and the first down converter; And a second filter configured to load the intermediate frequency signal converted by the first down converter on the power line to the base station and to separate the intermediate frequency signal transmitted from the base station from the commercial power line. do.

Further, the third apparatus of the present invention is a relay system for relaying a signal using a power line in a wireless communication network, wherein the high frequency signal received from a base station is converted into an intermediate frequency signal and transmitted on the power line, and the power line A repeater for separating the intermediate frequency signal from the high frequency signal and transmitting the signal to the base station; And separating the intermediate frequency signal transmitted from the repeater to the power line, converting the intermediate frequency signal into a high frequency signal, and transmitting the converted high frequency signal to the wireless communication terminal, converting the high frequency signal received from the wireless communication terminal into an intermediate frequency signal, and placing the intermediate frequency signal on the power line. And a remote repeater for transmitting to the apparatus, wherein the repeater comprises: a first down converter for converting a high frequency signal received from the base station into an intermediate frequency signal of a band with less attenuation in the power line; A first up converter for converting the intermediate frequency signal transmitted from the remote repeater into a high frequency signal; First and second phase difference separators for converting a transmission / reception signal by using a phase difference at both sides of the first up converter and the first down converter; And a first filter for carrying the intermediate frequency signal converted by the first down converter on the power line and separating the intermediate frequency signal transmitted from the remote repeater from the commercial power line. A second down converter for converting a high frequency signal received from the wireless communication terminal into an intermediate frequency signal having the same band as the intermediate frequency converted by the first down converter; A second up converter for converting the intermediate frequency signal transmitted from the repeater into a high frequency signal; Third and fourth phase difference separators for switching transmission and reception signals using phase differences on both sides of the second up converter and the second down converter; And a second filter configured to load the intermediate frequency signal converted by the second down converter on the power line and transmit the intermediate frequency signal to the repeater, and to separate the intermediate frequency signal transmitted from the repeater from the commercial power line. do.

In addition, the fourth apparatus of the present invention, a relay system for relaying signals using a power line in a wireless communication network, comprising: a base station for carrying an intermediate frequency signal on the power line and transmitting the intermediate frequency signal from the power line; And separating the intermediate frequency signal transmitted from the base station to the power line, converting the intermediate frequency signal into a high frequency signal, and transmitting the converted high frequency signal to the wireless communication terminal, converting the high frequency signal received from the wireless communication terminal into an intermediate frequency signal, and loading the same into the power line. A base station comprising: a first filter configured to transmit an intermediate frequency signal on the power line and to separate the intermediate frequency signal transmitted from the remote repeater from the commercial power line; And a first phase difference separator for converting a transmission / reception signal using a phase difference at one side of the first filter, wherein the remote repeater includes a high frequency signal received from the wireless communication terminal, such as an intermediate frequency received from the base station. A first down converter for converting the band to an intermediate frequency signal; A first up converter for converting the intermediate frequency signal transmitted from the base station into a high frequency signal; Second and third phase difference separators for switching transmission and reception signals using phase differences on both sides of the first up converter and the first down converter; And a second filter configured to load the intermediate frequency signal converted by the first down converter on the power line to the base station and to separate the intermediate frequency signal transmitted from the base station from the commercial power line. do.

In addition, the fifth apparatus of the present invention, in a relay system for relaying signals using a power line in a wireless communication network, amplifies and transmits a high frequency signal received from a base station, and amplifies the high frequency signal separated from the power line. A repeater for transmitting to the base station; A first coupler configured to transfer the high frequency signal received from the repeater to the power line and to separate the high frequency signal from the power line and to transmit the high frequency signal to the repeater; A second coupler for separating the high frequency signal transmitted to the power line through the first coupler and transmitting the high frequency signal transmitted from a wireless communication terminal to the power line through the first coupler to the repeater ; And amplifying a high frequency signal separated by the second coupler to transmit to the wireless communication terminal, and amplifying a high frequency signal received from the wireless communication terminal in order to service a small radio shade area located around the base station. And a remote repeater mounted on the power line via a second coupler for transmission to the repeater.

In addition, the sixth apparatus of the present invention, a relay system for relaying signals using a power line in a wireless communication network, comprising: a base station for amplifying and transmitting a high frequency signal and amplifying a high frequency signal separated from the power line; A first coupler configured to transmit the high frequency signal received from the base station to the power line and to separate the high frequency signal from the power line and to transmit the high frequency signal to the base station; A second for separating the high frequency signal transmitted from the base station to the power line through the first coupler, and transmitting the high frequency signal transmitted from a wireless communication terminal to the power line and transmitting the high frequency signal to the base station through the first coupler; Coupler; And amplifying a high frequency signal separated by the second coupler to transmit to the wireless communication terminal, and amplifying a high frequency signal received from the wireless communication terminal in order to service a small radio shade area located around the base station. And a remote repeater mounted on the power line via a second coupler for transmission to the base station.

In addition, the seventh apparatus of the present invention, in a relay system for relaying signals using a power line in a wireless communication network, converting a high frequency signal received from a base station into an intermediate frequency signal and controlling the gain according to the signal strength to the power line Relaying means for transmitting an intermediate frequency signal from the power line, converting the intermediate frequency signal into a high frequency signal, controlling the gain according to signal strength, and transmitting the signal to the base station; The intermediate means separates the intermediate frequency signal carried on the power line and converts the signal into a high frequency signal, controls the gain and sends the gain to the wireless communication terminal, converts the high frequency signal received from the wireless communication terminal into the intermediate frequency signal and obtains the gain. A plurality of remote repeater means for controlling and transmitting on the power line to the repeater; A plurality of signal generating means for generating a signal according to a unique identifier (ID) set in said plurality of remote relay means and transmitting it through said power line; And gain control means for receiving a signal from each signal generating means through the power line and transmitting a gain control signal for compensating for the loss variation according to the length of the power line to the remote relay means through the power line. It features.

In addition, the eighth device of the present invention is a relay system for relaying signals using a power line in a wireless communication network, comprising: a base station for transmitting an intermediate frequency signal on the power line and separating the intermediate frequency signal from the power line; ; The base station separates the intermediate frequency signal carried on the power line and converts the signal into a high frequency signal and transmits the gain to the wireless communication terminal by converting the high frequency signal received from the wireless communication terminal into an intermediate frequency signal and controlling the gain. A plurality of remote repeaters mounted on the power line for transmission to the base station; A plurality of signal generating means for generating a signal according to a unique identifier (ID) set to each of said plurality of remote repeaters and transmitting them through said remote repeater and said power line; And gain control means for receiving a signal from each signal generating means through the power line and transmitting a gain control signal for compensating for a loss variation in accordance with a power line length to each of the remote repeaters through the power line. It is done.

In a relay system for relaying signals using a power line in a wireless communication network, the ninth apparatus of the present invention amplifies and transmits a high frequency signal received from a base station and amplifies the high frequency signal separated from the power line. Relay means for transmitting to a base station; First coupling means for transmitting the high frequency signal received from the relay means to the power line, separating the high frequency signal from the power line, and transmitting the high frequency signal to the relay means; A plurality of second pieces for separating the high frequency signals transmitted to the power line through the first coupling means and transmitting the high frequency signals transmitted from the wireless communication terminal to the power supply means; Coupling means; Connected to the plurality of second coupling means, amplifies the high frequency signal separated by the second coupling means, transmits the radio frequency signal to the corresponding wireless communication terminal, and amplifies the high frequency signal received from the wireless communication terminal. A plurality of remote relay means for transmitting on said power line to said relay means via said second coupling means; A plurality of signal generating means for generating a signal according to a unique identifier (ID) set in said plurality of remote relay means and transmitting it through said power line; And gain control means for receiving a signal from each signal generating means through the power line and transmitting a gain control signal for compensating for the loss variation according to the length of the power line to the remote relay means through the power line. It features.

The tenth apparatus of the present invention is a relay system for relaying signals using a power line in a wireless communication network, the relay system comprising: a base station for amplifying and transmitting a high frequency signal and amplifying a high frequency signal separated from the power line; First coupling means for transmitting the high frequency signal received from the base station to the power line, separating the high frequency signal from the power line, and transmitting the high frequency signal to the base station; Separating the high frequency signal transmitted from the base station to the power line through the first coupling means, and transmitting the high frequency signal transmitted from the wireless communication terminal to the power line to the base station through the first coupling means. A plurality of second coupling means for; Connected to the plurality of second coupling means, amplifies the high frequency signal separated by the second coupling means, transmits the radio frequency signal to the corresponding wireless communication terminal, and amplifies the high frequency signal received from the wireless communication terminal. Remote relay means for transmitting on the power line to the base station through the corresponding second coupling means; A plurality of signal generating means for generating a signal according to a unique identifier (ID) set in said plurality of remote relay means and transmitting it through said power line; And gain control means for receiving a signal from each signal generating means through the power line and transmitting a gain control signal for compensating for the loss variation according to the length of the power line to the remote relay means through the power line. It features.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a diagram illustrating an example of a relay system using a power line in a wireless communication network according to the present invention, in which a repeater system and a remote repeater 42 use a commercial power line 46 to relay a signal. Here, the repeater 40 will be described by taking a donor repeater as an example.

The donor repeater 40 and the remote repeater 42 have power outlets 44 and 48 at ends, respectively, and the donor repeater 40 and the power outlets 44 and 48 through the commercial power line 46. The remote repeater 42 is connected. Here, the phase power source, the neutral line, and the ground line may be used through the power outlets 44 and 48. However, in case of using phase power for economical signal transmission in radio wave shading area, constraints such as power noise, corona discharge, coupling loss due to transformer, and third-order intermodulation (IM) parasitic signal Use neutral and ground lines to overcome this problem. Since the same as the power outlets of FIGS. 5 to 7 will be omitted.

The donor repeater 40 includes first and second duplexers 402 and 408, a first up converter and a first down converter 404 and 406, a first filter 410, a first RF modem 411, and a first and second duplexers 402 and 408. Second high power amplifiers 403 and 409, first and second low noise amplifiers 407 and 405, and first power supply 412. Here, the first RF modem 411, the first and second high power amplifiers (403, 409), the first and second low noise amplifiers (407, 405) is an additional necessary when connecting a plurality of remote repeaters to one donor repeater (40) Element.

The first down converter 406 loads a high frequency (RF) signal received through an antenna 400 from a base station (not shown in FIG. 4, 502 of FIG. 5) at an intermediate frequency, that is, on the commercial power line 46. The signal is converted into a signal of an intermediate frequency (intermediate frequency with the least amount of attenuation in the commercial power line) suitable for the transmission, and transmitted to the remote repeater 42 through the second duplexer 408, the first filter 410, and the commercial power line 46. . For example, when the use frequency is 1FA, the transmission intermediate frequency may be 4.95 MHz.

In general, in the case of cellular mobile phones, the frequency band currently used is 800 MHz, and in the case of PCS, the first down converter 406 converts a high frequency signal into a low frequency signal. Can be implemented as a device.

In contrast, the first up converter 404 receives the intermediate frequency (receiving intermediate frequency) of the mobile telephone signal from the remote repeater 42 through the commercial power line 46, the first filter 410, and the second duplexer 408. It converts the original high frequency signal and transmits it to any one base station through the antenna 400. At this time, for example, the reception intermediate frequency may be used as 1.95 MHz or 630 KHz. If the transmission intermediate frequency is used as 1.95MHz, the reception intermediate frequency can be used as 4.95MHz or 630KHz. Therefore, the first up converter 404 may be implemented as a device for converting a low frequency signal into a high frequency signal.

Of course, the range of frequency conversion in the first up-converter and the first down-converter 404 and 406 can be modified as long as it is within the range of frequencies that can be loaded on the commercial power line 46 without difficulty. In addition, the frequencies of the first up converter and the first down converter 404 and 406 may be used as the same frequency, and in this case, transmission and reception using a phase difference separator (not shown) instead of the first and second duplexers 402 and 408. Just switch the two signals.

The first filter 410 loads the intermediate frequency signal converted by the first down converter 406 on the power source AC 110 / 220V of the commercial power line 46 and receives the intermediate frequency received from the remote repeater 42. Signal from the commercial power line 46 (AC 110 / 220V). This is to ensure that the commercial power supply and communication signals are properly separated from each other and not interfered with each other. In this case, the signal from the first filter 410 is input to the power outlet 44 from the first power supply 412. Here, the first power supply 412 is a part for supplying power to the donor repeater 40, and converts the AC 110 / 220V power to DC 27V or 12V through the first converter 414 to the donor repeater 40. Supply power.

In addition, the first duplexer 402 duplexes a high frequency signal between the antenna 400, the first up converter, and the first down converter 404 and 406. The second duplexer 408 duplexes the intermediate frequency signal between the first filter 410 and the first up converter and the first down converter 404, 406. Here, the duplexers 402 and 408 are transmit / receiver switches that protect the receiver from transmission output when transmitting one antenna for common use in transmission and reception and supply an echo signal to the receiver when receiving. The third and fourth duplexers 424 and 430 described later also perform the same function.

Meanwhile, the remote repeater 42 includes third and fourth duplexers 424 and 430, second up converter and second down converter 426 and 428, second filter 432, second RF modem 433, third and third Four high power amplifiers 429 and 425, third and fourth low noise amplifiers 427 and 431, and a second power supply 434. Of course, the second RF modem 433, the third and fourth high power amplifiers 429 and 425, and the third and fourth low noise amplifiers 427 and 431 are necessary to connect a plurality of remote repeaters to one donor repeater 40. Element.

In this case, the remote repeater 42 also has the same structure as the donor repeater 40. The second down converter 428 receives a high frequency signal from a plurality of wireless communication terminals (not shown) through the antenna 422. The signal is converted into a signal having an intermediate frequency suitable for loading on the commercial power line 46, and transmitted to the donor repeater 40 through the fourth duplexer 430, the second filter 432, and the commercial power line 46.

The second up-converter 426 receives an intermediate frequency (receiving intermediate frequency) from the donor repeater 40 through the commercial power line 46, the second filter 432, and the fourth duplexer 430, and then receives the original high frequency wave. The signal is converted into a signal and transmitted to the wireless communication terminal through the antenna 422.

In this case, the second up converter and the second down converter 426 and 428 of the remote repeater 42 correspond to the first down converter and the first up converter 406 and 404 of the donor repeater 40. The second up-converter and the second down-converters 426 and 428 may also be implemented as frequency converters.

The second filter 432 loads the intermediate frequency signal converted by the second down converter 428 into the power source AC 110 / 220V of the commercial power line 46 and receives the intermediate frequency received from the donor repeater 40. Signal from the commercial power supply (AC 110 / 220V). This is to ensure that the commercial power supply and communication signals are properly separated from each other and not interfered with each other. In this case, the signal from the second filter 432 is input from the second power supply 434 to the power outlet 48. Here, the second power supply 436 is a part for supplying power to the remote repeater 42, and converts the AC 110 / 220V power to DC 27V or 12V through the second converter 436 to the remote repeater 42 Supply power.

The third duplexer 424 duplexes the high frequency signal between the antenna 422, the second up converter, and the second down converter 426, 428. The fourth duplexer 430 duplexes the intermediate frequency signal between the second filter 432 and the second up converter and the second down converter 426 and 428.

As in the donor repeater 40, the frequencies of the second up-converter and the second down-converter 426 and 428 may be used as the same frequency. In this case, instead of the first and duplexers 424 and 430, a phase difference separator (not shown) may be used. You can switch between two signals of transmission and reception using.

In addition, the remote repeater 42 is mainly installed in a tunnel, underground, building interior or radio shade area. In this case, when the radio shade area is wide or the transmission distance through the commercial power line 46 is necessary to further amplify the signal, a low noise amplifier (LNA) in each output terminal of the first to fourth duplexers 402, 408, 424, 430, etc. (405, 407, 427, 431) can be further added to appropriately amplify the transmit and receive signals.

On the other hand, when one donor repeater 40 and N (N is a natural number) remote repeater 42 as shown in FIG. 7 to be described later, the state monitoring, control and automatic gain adjustment of each remote repeater The first and second RF modems (ASK or FSK modems) 411 and 433 may be further placed (AGC) and the like.

Looking at the operation principle, each of the remote repeater 42 sets a unique identifier (ID) for each set to generate a tone signal by each second RF modem 433. Then, the donor repeater 40 reads the tone signal (ID) level of the second RF modem 433 through the first RF modem 411, and reads each of the remote repeaters 42 through the second RF modem 433. The gain of the third and fourth high power amplifiers (HPA) 429 and 425 is controlled. This is to compensate for the loss deviation caused by different power line lengths from the donor repeater 40 to each of the N remote repeaters so that each remote repeater can output a constant signal level. In the donor repeater 40, the signal strength (field strength) to / from any base station is recognized to control gains of the first and second high power amplifiers 403 and 409. Since the technology for connecting a plurality of remote repeaters in parallel is equally applicable to each of the following embodiments will be omitted in the following description.

FIG. 5 is a diagram illustrating an example of applying a relay system using the power line shown in FIG. 4, and illustrates a specific example in which the relay system is applied to the ground.

Here, the donor repeater 504 receives the use FA from the base station 502 and goes through the same process as described above to the remote repeater 514 through the power outlet 510, the commercial power line 508, and the power outlet 512. To the side. Then, the remote repeater 514 sends the signal received from the donor repeater 504 to the wireless communication terminal to reproduce the signal in the reverse order of the signal processing of the donor repeater 504 as described above.

FIG. 6 is a diagram illustrating an example in which a relay system using the power line shown in FIG. 4 is modified, and shows a specific example in which one side of the relay system is modified to be mounted on a base station.

The relay system as shown in FIG. 6 is applicable when the position of the remote repeater 610 is short distance (1-2 km) from the base station 602. At this time, the communication signal is transmitted to the remote repeater 610 through the power outlet 604, the commercial power line 606, and the power outlet 608 directly from the base station 602 without passing through the donor repeater.

In this case, since the intermediate frequency of the base station 602 can be used directly, there is no need for an up converter and a down converter on the base station side, and only one duplexer may be provided.

However, when the intermediate frequency of the base station 602 is not used immediately but is converted and used, the up converter and the down converter are used as they are.

FIG. 7 illustrates another example in which the relay system using the power line shown in FIG. 4 is applied, in which the first and second remote repeaters 708 and 710 are installed in parallel in a basement, a tunnel, or a radio shading area.

That is, the communication signals transmitted from the repeater or base station 702 through the power outlet 704 and the commercial power line 706 are connected in parallel in the basement (for example, tunnels, basement 1 and 2 floors) or radio shade areas. The other power line 714 and power outlets 712 and 716 to the remote repeaters 708 and 710, respectively. Other configurations and operation methods are as described above and will be omitted herein.

8 is another exemplary diagram of a relay system using a power line in a wireless communication network according to the present invention.

The relay system as shown in FIG. 8 is applicable when the location of the remote repeater 808 is the latest distance from the base station 802. In this case, when the distance to the radio shadow area is the latest and the radio shadow area is small, the coupler 806 after amplifying the signal applied from the base station 802 in the donor repeater 804 or the booster without using an intermediate frequency. Is applied to the power line or coaxial cable to transmit a communication signal to the remote repeater (808). Then, the communication signal is separated and detected using the coupler 810 in the radio shade area to be serviced, and the remote repeater 808, which has received it, filters and amplifies the corresponding communication signal and services the radio shade area. In this case, since the intermediate frequency is not used, the first and second up converters and down converters 404, 406, 426 and 428 may be eliminated in the configuration of FIG. 4 as described above. Accordingly, there may be only one phase difference separator in the donor repeater 802 and the remote repeater 808.

As another example, after amplifying a high frequency signal at the base station 802 without using the donor repeater 804, the coupler 806 may apply a communication signal directly to a power line or a coaxial cable.

9 is another exemplary diagram of a relay system using a power line in a wireless communication network according to the present invention, and shows an example of a relay system not using a remote repeater.

As shown in FIG. 9, the donor repeater 902 includes a level regulator 904 for amplifying or attenuating and transmitting a signal, and a phase difference regulator for adjusting a phase difference that may occur on a transmission line using a power line as a medium. 906 and an impedance matching device 908 for compensating the inductance component and the capacitance component, and the like. In this case, the communication signal applied to the power line 910 through the impedance matching unit 902 of the donor repeater 902 is propagated and serviced by the inductance (L) component of the lamp, so that a remote repeater is not required separately. .

Of course, even when the distance from the base station to the radio shade area is close, the donor repeater 902 is not used, and the base station is provided with a level adjuster 904, a phase difference adjuster 906, and an impedance matching unit 908. You can also service.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

The present invention as described above, by the base station or the donor repeater and the remote repeater relays the communication signal using a commercial power line, there is an effect that can significantly reduce the installation cost of the relay system.

In addition, in the case of replacing the current optical relay system with the relay system of the present invention, there is an effect that can significantly reduce the optical fiber rental and equipment prices.

In addition, in the case of replacing the current wave relay system with the relay system of the present invention, it is possible to significantly improve the installation opinion, it is possible to reduce the device price.

In addition, the present invention can be easily installed using a power line when used for indoor use, as well as a new building, there is an effect that can be installed in a quick time without friction with the building owner or residents (merchants).

Claims (21)

In a relay system for relaying signals using a power line in a wireless communication network, A repeater for converting a high frequency signal received from a base station into an intermediate frequency signal for transmission on the power line, separating the intermediate frequency signal from the power line, converting the high frequency signal into a high frequency signal, and transmitting the same to the base station; And The intermediate frequency signal transmitted from the repeater to the power line is separated and converted into a high frequency signal and transmitted to a wireless communication terminal, and the high frequency signal received from the wireless communication terminal is converted into an intermediate frequency signal and loaded on the power line to the repeater. Equipped with a remote repeater for transmission, The repeater, A first down converter for converting a high frequency signal received from the base station into an intermediate frequency signal having a low attenuation band in the power line; A first up converter for converting the intermediate frequency signal transmitted from the remote repeater into a high frequency signal; First and second duplexers for duplexing transmission and reception signals at both sides of the first up converter and the first down converter; And And a first filter for carrying the intermediate frequency signal converted by the first down converter on the power line and separating the intermediate frequency signal transmitted from the remote repeater from the commercial power line. The remote repeater, A second down converter for converting a high frequency signal received from the wireless communication terminal into an intermediate frequency signal of a band with less attenuation in the power line; A second up converter for converting the intermediate frequency signal transmitted from the repeater into a high frequency signal; Third and fourth duplexers for duplexing transmission and reception signals at both sides of the second up converter and the second down converter; And And a second filter configured to load the intermediate frequency signal converted by the second down converter onto the power line and transmit the intermediate frequency signal to the repeater, and to separate the intermediate frequency signal transmitted from the repeater from the commercial power line. Relay system. In a relay system for relaying signals using a power line in a wireless communication network, A base station for transmitting an intermediate frequency signal on the power line and separating the intermediate frequency signal from the power line; And The base station separates the intermediate frequency signal transmitted on the power line and converts the signal into a high frequency signal and sends it to the wireless communication terminal. The high frequency signal received from the wireless communication terminal is converted into an intermediate frequency signal and loaded on the power line to the base station. Equipped with a remote repeater for transmission, The base station, A first filter for carrying an intermediate frequency signal on the power line and separating the intermediate frequency signal transmitted from the remote repeater from the power line; And A first duplexer for duplexing a transmission / reception signal at one side of the first filter, The remote repeater, A first down converter for converting a high frequency signal received from the wireless communication terminal into an intermediate frequency signal of a band with less attenuation in the power line; A first up converter for converting the intermediate frequency signal transmitted from the base station into a high frequency signal; Second and third duplexers for duplexing transmission and reception signals at both sides of the first up converter and the first down converter; And And a second filter configured to load the intermediate frequency signal converted by the first down converter on the power line to the base station, and to separate the intermediate frequency signal transmitted from the base station from the commercial power line. Relay system. The method of claim 2, The base station, A second down converter for converting a signal of the base station into an intermediate frequency signal of a band with low attenuation in the power line; And And a second up converter for converting the intermediate frequency signal transmitted from the remote repeater into a signal of the base station. In a relay system for relaying signals using a power line in a wireless communication network, A repeater for converting a high frequency signal received from a base station into an intermediate frequency signal for transmission on the power line, separating the intermediate frequency signal from the power line, converting the high frequency signal into a high frequency signal, and transmitting the same to the base station; And The intermediate frequency signal transmitted from the repeater to the power line is separated and converted into a high frequency signal and transmitted to a wireless communication terminal, and the high frequency signal received from the wireless communication terminal is converted into an intermediate frequency signal and loaded on the power line to the repeater. Equipped with a remote repeater for transmission, The repeater, A first down converter for converting a high frequency signal received from the base station into an intermediate frequency signal having a low attenuation band in the power line; A first up converter for converting the intermediate frequency signal transmitted from the remote repeater into a high frequency signal; First and second phase difference separators for converting a transmission / reception signal by using a phase difference at both sides of the first up converter and the first down converter; And And a first filter for carrying the intermediate frequency signal converted by the first down converter on the power line and separating the intermediate frequency signal transmitted from the remote repeater from the commercial power line. The remote repeater, A second down converter for converting a high frequency signal received from the wireless communication terminal into an intermediate frequency signal of the same band as the intermediate frequency converted by the first down converter; A second up converter for converting the intermediate frequency signal transmitted from the repeater into a high frequency signal; Third and fourth phase difference separators for switching transmission and reception signals using phase differences on both sides of the second up converter and the second down converter; And And a second filter configured to load the intermediate frequency signal converted by the second down converter onto the power line and transmit the intermediate frequency signal to the repeater, and to separate the intermediate frequency signal transmitted from the repeater from the commercial power line. Relay system. In a relay system for relaying signals using a power line in a wireless communication network, A base station for transmitting an intermediate frequency signal on the power line and separating the intermediate frequency signal from the power line; And The base station separates the intermediate frequency signal transmitted on the power line and converts the signal into a high frequency signal and sends it to the wireless communication terminal. The high frequency signal received from the wireless communication terminal is converted into an intermediate frequency signal and loaded on the power line to the base station. Equipped with a remote repeater for transmission, The base station, A first filter for carrying an intermediate frequency signal on the power line and separating the intermediate frequency signal transmitted from the remote repeater from the commercial power line; And A first phase difference separator for converting a transmission / reception signal by using a phase difference at one side of the first filter, The remote repeater, A first down converter for converting a high frequency signal received from the wireless communication terminal into an intermediate frequency signal of the same band as the intermediate frequency received from the base station; A first up converter for converting the intermediate frequency signal transmitted from the base station into a high frequency signal; Second and third phase difference separators for switching transmission and reception signals using phase differences on both sides of the first up converter and the first down converter; And And a second filter configured to load the intermediate frequency signal converted by the first down converter on the power line to the base station, and to separate the intermediate frequency signal transmitted from the base station from the commercial power line. Relay system. The method of claim 5, The base station, A second down converter for converting a signal of the base station into an intermediate frequency signal of a band with low attenuation in the power line; And And a second up converter for converting the intermediate frequency signal transmitted from the remote repeater into a signal of the base station. In a relay system for relaying signals using a power line in a wireless communication network, A repeater for amplifying and transmitting a high frequency signal received from a base station and amplifying and transmitting the high frequency signal separated from the power line to the base station; A first coupler configured to transfer the high frequency signal received from the repeater to the power line and to separate the high frequency signal from the power line and to transmit the high frequency signal to the repeater; A second coupler for separating the high frequency signal transmitted to the power line through the first coupler and transmitting the high frequency signal transmitted from a wireless communication terminal to the power line through the first coupler to the repeater ; And In order to service a small radio shade area located around the base station, the high frequency signal separated by the second coupler is amplified and transmitted to the wireless communication terminal, and the high frequency signal received from the wireless communication terminal is amplified. 2 Remote repeater for transmission to the repeater on the power line through a coupler Relay system comprising a. In a relay system for relaying signals using a power line in a wireless communication network, A base station for amplifying and transmitting a high frequency signal and amplifying a high frequency signal separated from the power line; A first coupler configured to transmit the high frequency signal received from the base station to the power line and to separate the high frequency signal from the power line and to transmit the high frequency signal to the base station; A second coupler for separating the high frequency signal transmitted from the base station to the power line through the first coupler and transmitting the high frequency signal transmitted from a wireless communication terminal to the power line to the base station through the first coupler ; And In order to service a small radio shade area located around the base station, the high frequency signal separated by the second coupler is amplified and transmitted to the wireless communication terminal, and the high frequency signal received from the wireless communication terminal is amplified. 2 Remote repeater for transmitting to the base station via the coupler on the power line Relay system comprising a. The method according to any one of claims 1 to 8, And transmitting and receiving signals using the neutral line and the ground line of the power line. The method according to any one of claims 1 to 6, Each filter, And a power system connected to the power line through a power outlet. The method according to claim 1 or 4, The repeater further includes a first and a second amplifier for amplifying the transmitted and received signals, respectively, The remote repeater further comprises a third and fourth amplifier for amplifying the transmission and reception signals, respectively. The method according to claim 2 or 5, The base station further comprises a first and a second amplifier for amplifying the transmitted and received signals, respectively, The remote repeater further comprises a third and fourth amplifier for amplifying the transmission and reception signals, respectively. In a relay system for relaying signals using a power line in a wireless communication network, Converts the high frequency signal received from the base station into an intermediate frequency signal and transmits the gain on the power line by controlling the gain according to the signal strength, and converts the intermediate frequency signal from the power line into a high frequency signal and controls the gain according to the signal strength. Relay means for transmitting to the base station; The intermediate means separates the intermediate frequency signal carried on the power line and converts the signal into a high frequency signal, controls the gain and sends the gain to the wireless communication terminal, converts the high frequency signal received from the wireless communication terminal into the intermediate frequency signal and obtains the gain. A plurality of remote repeater means for controlling and transmitting on the power line to the repeater; A plurality of signal generating means for generating a signal according to a unique identifier (ID) set in said plurality of remote relay means and transmitting it through said power line; And Gain control means for receiving a signal from each signal generating means through the power line and transmitting a gain control signal for compensating for the loss variation along the power line length to each of the remote relay means through the power line. Relay system comprising a. In a relay system for relaying signals using a power line in a wireless communication network, A base station for transmitting an intermediate frequency signal on the power line and separating the intermediate frequency signal from the power line; The base station separates the intermediate frequency signal carried on the power line and converts the signal into a high frequency signal and transmits the gain to the wireless communication terminal by converting the high frequency signal received from the wireless communication terminal into an intermediate frequency signal and controlling the gain. A plurality of remote repeaters mounted on the power line for transmission to the base station; A plurality of signal generating means for generating a signal according to a unique identifier (ID) set to each of said plurality of remote repeaters and transmitting them through said remote repeater and said power line; And Gain control means for receiving a signal from each signal generating means through the power line and transmitting a gain control signal for compensating for the loss variation according to the length of the power line through the power line to the remote repeaters. Relay system comprising a. In a relay system for relaying signals using a power line in a wireless communication network, Relay means for amplifying and transmitting a high frequency signal received from a base station, and for amplifying and transmitting the high frequency signal separated from the power line to the base station; First coupling means for transmitting the high frequency signal received from the relay means to the power line, separating the high frequency signal from the power line, and transmitting the high frequency signal to the relay means; A plurality of second pieces for separating the high frequency signals transmitted to the power line through the first coupling means and transmitting the high frequency signals transmitted from the wireless communication terminal to the power supply means; Coupling means; Connected to the plurality of second coupling means, amplifies the high frequency signal separated by the second coupling means, transmits the radio frequency signal to the corresponding wireless communication terminal, and amplifies the high frequency signal received from the wireless communication terminal. A plurality of remote relay means for transmitting on said power line to said relay means via said second coupling means; A plurality of signal generating means for generating a signal according to a unique identifier (ID) set in said plurality of remote relay means and transmitting it through said power line; And Gain control means for receiving a signal from each signal generating means through the power line and transmitting a gain control signal for compensating for the loss variation along the power line length to each of the remote relay means through the power line. Relay system comprising a. In a relay system for relaying signals using a power line in a wireless communication network, A base station for amplifying and transmitting a high frequency signal and amplifying a high frequency signal separated from the power line; First coupling means for transmitting the high frequency signal received from the base station to the power line, separating the high frequency signal from the power line, and transmitting the high frequency signal to the base station; Separating the high frequency signal transmitted from the base station to the power line through the first coupling means, and transmitting the high frequency signal transmitted from the wireless communication terminal to the power line to the base station through the first coupling means. A plurality of second coupling means for; Connected to the plurality of second coupling means, amplifies the high frequency signal separated by the second coupling means, transmits the radio frequency signal to the corresponding wireless communication terminal, and amplifies the high frequency signal received from the wireless communication terminal. Remote relay means for transmitting on the power line to the base station through the corresponding second coupling means; A plurality of signal generating means for generating a signal according to a unique identifier (ID) set in said plurality of remote relay means and transmitting it through said power line; And Gain control means for receiving a signal from each signal generating means through the power line and transmitting a gain control signal for compensating for the loss variation along the power line length to each of the remote relay means through the power line. Relay system comprising a. The method according to any one of claims 13 to 16, The gain control means, And a first RF modem for condition monitoring, control and automatic gain adjustment (AGC) of each of said plurality of remote relay means. The method according to any one of claims 13 to 16, The signal generating means, And a second RF modem for generating a tone signal according to a unique identifier (ID) set in each of said plurality of remote relay means. The method according to any one of claims 13 to 16, The plurality of remote relay means is installed in a tunnel, underground, building or radio shade area, relay system, characterized in that connected to the power line in parallel. The method according to any one of claims 13 to 16, And transmitting and receiving signals using the neutral line and the ground line of the power line. The method according to claim 13 or 14, And the power line is connected to each component through a power outlet.

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