KR20100048227A - Mobile communication relay system, tower top amplifier and high power amplifier - Google Patents

Abstract

PURPOSE: A mobile radio communications relay system using a high power amplifier compensating power supply is provided to supply a uniform mobile communication service in a tower top amplifier. CONSTITUTION: A mobile relay system includes a BS(Base Station)(10), a line(30), a tower top amplifier(40) and an antenna. The line transfers the signal transmitted from the base station. The tower top amplifier is connected to the line. The tower top amplifier receives a message signal. The tower top amplifier recompenses the electricity of being lost in the line. The antenna is connected to the tower top amplifier.

Description

Mobile communication relay system, Tower top amplifier and High power amplifier

The present invention relates to a mobile communication relay system, a tower top amplifier and a large power amplifier, and more particularly, a tower top amplifier minimizing a difference between an input signal and an output signal by inputting a large power signal, and a large power amplifier used therein, And a mobile communication relay system using the same.

In a mobile communication system, wireless communication is performed by exchanging signals between a base station and a terminal. At this time, the antenna for transmitting and receiving signals between the base station and the terminal is installed on the top of the tower, so that the signal transmission and reception proceeds efficiently. At this time, a tower top amplifier for controlling the size of the signal transmitted from the base station and controlling the noise of the received signal is formed on the top of the tower.

When transmitting a signal from the base station to the terminal, the tower top amplifier uses a high voltage amplifier to amplify and transmit the transmission voltage at the top of the tower. At this time, the high voltage amplifier can only amplify the high voltage of a considerable magnitude. Therefore, in order to properly control the signal amplified and output from the tower top amplifier, it is necessary to adjust the magnitude of the voltage input to the tower top amplifier low. Therefore, in consideration of the magnitude of the voltage amplified in the high-voltage amplifier, a cumbersome procedure for adjusting the voltage input to the tower top amplifier low.

In addition, the signal input to the tower top amplifier may be output as it is without being amplified beyond the inside of the tower top amplifier. Then, the output value when the tower top amplifier is normal and the output value when the tower top amplifier is abnormal are greatly different. This is because the signal is amplified in the tower top amplifier when the tower top amplifier is normal. Then, when the tower top amplifier is normal and abnormal, the area where the signal is transmitted is greatly different. That is, the deviation of the wireless mobile communication service is increased, which may cause inconvenience to consumers.

On the other hand, when a signal is received from the terminal to the base station, the tower top amplifier receives the signal at both Rx0 and Rx1 to remove noise. At this time, when one of Rx0 or Rx1 is abnormal, a method of operating the tower top amplifier more efficiently is required.

The problem to be solved by the present invention is to provide a mobile communication relay system.

Another object of the present invention is to provide a tower tower amplification device used in a mobile communication relay system.

Another object of the present invention is to provide a large power amplifier for use in a tower top amplifier device.

Problems to be solved by the present invention are not limited to the above-mentioned contents, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a mobile communication relay system according to an embodiment of the present invention is a base station, a line for transmitting a signal transmitted from the base station, connected to the line and receiving the signal to receive power lost in the line. Compensating, but the difference between the input signal and the output signal includes a tower top amplifier which is a power value lost in the line, and an antenna connected to the tower top amplifier.

In order to achieve the above object, a tower tower amplifying apparatus according to an embodiment of the present invention includes a first transceiver for receiving a signal transmitted through a line from a base station, and a value lost from the line in connection with the first transceiver. An amplifying unit for amplifying the signal, a first bypass unit connected to the second transceiver and a second bypass unit for bypassing the signal when the amplifying unit is abnormal, and receiving a signal from the amplifying unit or the bypass unit and connecting the signal to the antenna And a controller configured to determine a transceiver and a movement path of the signal as an amplifier or a first bypass unit.

In order to achieve the above object, a large power amplifier according to an embodiment of the present invention is a large power amplifier used in a tower top amplifier, a directional coupler, a time delay filter for time delay the signal output from the directional coupler, A phase shifter for changing the phase of the signal branched from the directional coupler, an amplifying circuit for amplifying the signal output from the phase shifter, a first hybrid combiner for synthesizing the output signal of the amplifying circuit and the signal of the time delay filter and the first 1 includes an isolator defining the direction of the signal output from the hybrid coupler.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the terminal UI authoring apparatus and the terminal UI authoring method of the present invention as described above has the following effects.

According to a mobile communication relay system, a tower top amplifier, and a large power amplifier according to an embodiment of the present invention, when the transceiver circuit in the tower tower amplifier is normally operated, the signal is output from the second transceiver terminal and the transceiver is out of order. In this case, the difference between the signals output from the second transmission and reception terminals differs only by the value of the power lost in the line between the base station and the tower top amplifier. Therefore, the output value does not differ significantly between normal and abnormal tower top amplifiers. This is because the voltage input to the tower top amplifier is large and the value amplified inside the tower top amplifier is small.

Therefore, there is no significant difference between the area of the signal, that is, the area of the wireless service, when the tower top amplifier is normal and abnormal. That is, a more uniform wireless mobile communication service can be provided.

In addition, when a signal is received by the tower top amplifier, the signals transmitted to both the transmission and reception circuit and the reception circuit are not bypassed, thereby minimizing service problems due to equipment problems.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, “comprises” and / or “comprising” refers to the presence of one or more other components, steps, actions and / or devices. Or does not exclude additions.

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

1 is a diagram schematically illustrating a mobile communication relay system according to an embodiment of the present invention.

1, a mobile communication relay system according to an embodiment of the present invention includes a base station 10, a tower 20, a line 30, a tower top amplifier 40, and an antenna. 50).

Base station 10 generally refers to a fixed station that communicates with a terminal. According to the control information transmitted from the base station controller, the wireless physical channel required for data exchange with the terminal is set, and data transmitted from the upper layer protocol is transmitted to the terminal according to the wireless environment. In addition, it transmits the data received from the terminal to the upper layer protocol of the base station controller.

Antenna 50 transmits and receives a signal between the base station 10 and the terminal, the antenna 50 is generally formed on top of the tower (20). This is to make the transmission and reception of signals more efficiently.

A tower top amplifier 40 is installed in an upper region of the tower 20. The tower top amplifier 40 compensates for power loss in the line 30 connecting the base station 10 and the antenna 50 of the transmitted signal, and removes noise of the received signal.

The base station 10 and the tower top amplifier 40 are connected by a line 30, and the line 30 transmits signals transmitted and received between the base station 10 and the tower top amplifier 40. At this time, there is a loss of some power while the signal is being transmitted to the line 30.

Hereinafter, a tower top amplifier according to an embodiment of the present invention will be described in more detail with reference to FIGS. 2 to 3.

2 is a schematic diagram of a tower top amplifier according to an embodiment of the present invention. 3 is a schematic structural diagram of a high voltage amplifier according to an embodiment of the present invention.

1 to 3, a tower top amplifier 40 according to an embodiment of the present invention includes a transceiver circuit 500 and a receiver circuit 600.

The transmitting and receiving circuit 500 is a circuit for transmitting and receiving a signal between the terminal and the base station 10, the receiving circuit 600 is a circuit for receiving a signal from the terminal to the base station 10. That is, a signal received from the terminal to the base station 10 may be received by both the transceiver circuit 500 and the receiver circuit 600.

Hereinafter, the tower top amplifier 40 will be described as a main example of the case where a signal is transmitted from the transmission / reception circuit 500 of the tower top amplifier 40.

The transmission / reception circuit 500 of the tower top amplifier 40 includes a first transmission / reception terminal (Tx / Rx0) 510. The first transmission and reception terminal 510 is a terminal connected to the base station 10 and a signal transmitted from the base station 10 is input to the tower top amplifier 40, and the signal received from the terminal to the base station 10 is a tower top amplifier. This is a terminal output from the (40). The transmission direction of the signal is determined through the first switch 520 in the transmission signal input to the first transmission and reception terminal 510.

When the transmission / reception circuit 500 operates normally, the first switch 520 is connected to the first transmission / reception switcher 530, and the transmission signal input to the first transmission / reception terminal 510 is transmitted to the first transmission / reception switcher 530. Is passed to. However, when an error occurs in the transmission / reception circuit 500, the first switch 520 is connected to the first bypass circuit 580, and the transmission signal input to the first transmission / reception terminal 510 is a first bypass circuit. Is passed to 580.

When the transmission / reception circuit 500 operates normally, the transmission signal input to the first transmission / reception terminal 510 is transmitted to the first transmission / reception converter 530. The first transceiver 530 may be, for example, formed in a duplex shape. The first transceiver 530 includes a transmission filter and a reception filter, and performs a function of separating the reception signal and the transmission signal in addition to filtering the reception or transmission signal.

The signal passing through the first transceiver 530 is transmitted to the large power amplifier 700. The large power amplifier 700 includes a directional coupler 720, a time delay filter 780, a phase converter 730, an amplifying circuit 750, and the like.

The signal input from the input terminal 710 of the large power amplifier 700 is branched into a main signal and a sub signal in the directional coupler 720. In this case, the first circuit 721 to which the main signal is transmitted includes a time delay filter 780. That is, the main signal output from the directional coupler 720 is transmitted with a time delay through the time delay filter 780.

On the other hand, the second circuit 723 to which the sub-signals branched from the directional coupler 720 are transferred may include a phase converter 730, a first hybrid combiner 742, an amplification circuit 750, and a second hybrid combiner 746. Include. The sub-signals branched from the directional coupler 720 are phase-adjusted by the phase shifter 730, and the signals are branched by the first hybrid combiner 742. In addition, the signal branched from the first hybrid combiner 742 is connected to amplification units for amplifying the input high frequency signal with a predetermined gain, respectively, and the amplified signal from each amplification unit is again returned from the second hybrid combiner 746. Combined.

Meanwhile, the signal delayed by the time delay filter 780 of the first circuit 721 and the signal coupled by the second hybrid combiner 746 of the second circuit 723 are combined by the third hybrid combiner 748. The signal coupled from the third hybrid combiner 748 is output to the output terminal 770 via an isolator 760 that adjusts the direction of movement of the signal.

The large power amplifier 700 amplifies the input signal, and at this time, amplifies by the power value lost in the line 30 connecting the base station 10 and the tower top amplifier 40. Therefore, the difference in the signal output as the signal input to the large power amplifier 700 is equal to the power value lost in the line 30 connecting the base station 10 and the tower top amplifier 40, this value is yes For example, it may be about 3-10 dB.

The signal amplified and output from the high power amplifier 700 is input to the second transceiver 540. The second transceiver 540 may be formed in a structure similar to the first transceiver 530, and the second transceiver 540 combines the separated signals again.

The signal passing through the second transmission / reception switcher 540 is output to the second transmission / reception terminal 560 through the second switch 550. At this time, the signal output to the second transmission and reception terminal 560 is amplified by the power lost in the line between the base station 10 and the tower tower amplifier 40 compared to the signal input to the first transmission and reception terminal 510. It is a signal.

The second switch 550 is operated like the first switch 520, and when the first switch 520 is connected to the first transceiver 530, the second switch 550 is the second transceiver 540. When the first switch 520 is connected to the first bypass circuit 580, the second switch 550 is also connected to the first bypass circuit 580.

The second transmission / reception terminal 560 is a terminal from which a signal transmitted from the base station 10 is output from the tower top amplifier 40, and a signal received from the base station 10 is input to the tower top amplifier 40.

Meanwhile, when an error occurs in the transmission / reception circuit 500, the first switch 520 is connected to the first bypass circuit 580, and the transmission signal input to the first transmission / reception terminal 510 is a first bypass circuit. The signal transmitted to 580 and transmitted to the first bypass circuit 580 is transmitted to the second transmit / receive terminal 560 through the second switch 550. In this case, the signal output from the second transmission / reception terminal 560 is equal to the voltage of the signal input to the first transmission / reception terminal 510.

4 is a flowchart illustrating transmission signal processing in the tower top amplifier 40 according to an embodiment of the present invention.

1 to 4, the base station 10 transmits a signal of XdB (S110). The signal of XdB transmitted from the base station 10 is transmitted through the line 30, at which time, the signal of YdB is lost in the line 30 (S120). On the other hand, the signal X-YdB partially lost through the line 30 is input to the tower tower amplifier 40 (S130).

The signal input to the tower top amplifier 40 varies depending on whether the transmission / reception circuit of the tower top amplifier 40 operates normally (S140). When the tower top amplifier 40 operates normally, the signal is amplified by YdB inside the tower top amplifier 40 (S150). That is, it amplifies by the amount of power lost in the line (30). After amplifying the signal, the tower top amplifier 40 outputs a signal of XdB, and the output signal is transmitted to the terminal through the antenna 50 (S160).

When the tower top amplifier 40 does not operate normally, the signal is bypassed in the tower top amplifier 40 (S170). The bypassed signal is output from the tower top amplifier 40 as it is, and an X-Y dB signal such as an input signal is output and transmitted to the terminal through the antenna 50 (S180).

Of course, even if the signal is bypassed, it is natural that some signals are lost in the bypass circuit or the switch, but the present invention will be described without considering the signal loss in the switch or the bypass circuit. Considering the signal loss of the switch or bypass circuit, the bypassed signal has a smaller value than the input signal.

That is, according to the mobile communication relay system according to an embodiment of the present invention, when the transmission and reception circuit 500 in the tower top amplifier 40 is normally operated, the signal and the transmission and reception circuit 500 output from the second transmission and reception terminal 560. The difference between the signals output from the second transmission / reception terminal 560 when the signal is bypassed due to a difference of) may be different only by the value of the power lost in the line between the base station 10 and the tower top amplifier 40. Therefore, the output value does not differ significantly when the tower top amplifier 40 is normal and abnormal. This is because the magnitude of the voltage input to the tower top amplifier 40 is large and the value amplified in the tower top amplifier 40 is small.

Therefore, when the tower top amplifier 40 is normal and abnormal, the area of the signal, that is, the area of the wireless service, is not significantly different. That is, a more uniform wireless mobile communication service can be provided.

Hereinafter, referring to FIGS. 1 to 3, the remaining components of the tower top amplifier 40 will be described by taking a case where a signal is received by the transmission / reception circuit 500 of the tower top amplifier 40.

When a signal is received from the terminal to the base station 10, the signal is received by both the second transmission / reception terminal 560 of the transmission / reception circuit 500 and the first reception terminal Rx1 610 of the reception circuit 600.

The signal received by the second transmission / reception terminal 560 of the transmission / reception circuit 500 is transmitted to the first low noise amplifier 570 through the second transmission combiner 540 when the transmission / reception circuit 500 normally operates. The first low noise amplifier 570 amplifies the low noise of the signal, and the amplified signal is filtered by the first transmission combiner 530 into a predetermined band and the noise-removed signal is transmitted to the first transmission / reception terminal 510.

Meanwhile, when an error occurs in the transmission / reception circuit 500, the signal received by the second transmission / reception terminal 560 is bypassed to the first bypass circuit 580 and transmitted to the first transmission / reception terminal 510.

The signal received by the first receiving terminal 610 of the receiving circuit 600 is transferred to the band pass filter 620 so that only a signal of a predetermined band passes. The signal passing through the band pass filter 620 is amplified by the second low noise amplifier 640 through the third switch 630, and then connected to the second receiving terminal 660 by the fourth switch 650. It is delivered to the base station 10.

On the other hand, when an abnormality occurs in the receiving circuit 600, the third switch 630 and the fourth switch 650 is connected to the second bypass circuit 670, the signal passing through the band pass filter 620 is It is directly transmitted to the second receiving terminal 660 through the second bypass circuit 670.

When signals of both the transmit / receive circuit 500 and the receive circuit 600 are both bypassed, only signals that do not pass through the low noise amplifiers 570 and 640 are at risk of being delivered to the base station 10.

5 and 6 are flowcharts illustrating received signal processing of a tower top amplifier according to an embodiment of the present invention.

2 and 5, when the tower top amplifier 40 is normally operated, reception signal processing through the transmission and reception circuit 500 and the reception circuit 600 in both directions is performed as described above (S210).

On the other hand, it is checked whether or not an abnormality has occurred in the transmission / reception circuit 500 (S220).

When an error occurs in the transmission / reception circuit 500, the signal received by the transmission / reception circuit 500 is bypassed by the first bypass circuit 580, and the reception circuit 600 operates normally (S230). That is, the signal received by the receiving circuit 600 passes through the second low noise amplifier 640 without bypassing the second bypass circuit 670.

2 and 6, when the tower top amplifier 40 is normally operated, reception signal processing through the transmission and reception circuit 500 and the reception circuit 600 are performed as described above (S210).

On the other hand, it is checked whether or not an abnormality has occurred in the receiving circuit 600 (S222).

When an abnormality occurs in the receiver circuit 600, the signal received by the receiver circuit 600 is bypassed by the second bypass circuit 670, and the transceiver circuit 500 operates normally (S232). That is, the signal received by the transceiver circuit 500 may pass through the first low noise amplifier 570 without bypassing the first bypass circuit 580.

That is, the signal transmitted to both the transmitting and receiving circuit 500 and the receiving circuit 600 is not bypassed, thereby minimizing the problem of service due to the problem of the equipment.

The reception signal processing described above may be controlled by a controller (not shown), and the controller may control not only the reception signal processing but also the transmission signal processing and the operation of the tower top amplifier.

 Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You will understand that. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1 is a diagram schematically illustrating a mobile communication relay system according to an embodiment of the present invention.

2 is a schematic diagram of a tower top amplifier according to an embodiment of the present invention.

3 is a schematic structural diagram of a high voltage amplifier according to an embodiment of the present invention.

4 is a view for explaining a signal transmission method of the tower top amplifier according to an embodiment of the present invention.

5 and 6 are views for explaining a signal receiving method of the tower top amplifier according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

10: base station 30: line

40: tower tower amplifier 50: antenna

500: transceiver circuit 600: receiver circuit

700: large power amplifier 721: first circuit

723: second circuit

Claims (18)

Base station; A line for transmitting a signal transmitted from the base station; A tower top amplifier connected to the line to receive the signal to compensate for power lost in the line, wherein a difference between an input signal and an output signal is a power value lost in the line; And A mobile communication relay system comprising an antenna connected to the tower top amplifier. The method of claim 1, The tower top amplifier, A first transmission / reception terminal for receiving a signal transmitted from the base station; A transmission circuit connected to the first transmission / reception terminal for compensating and amplifying the line loss of the signal; A bypass circuit connected to the first transmission / reception terminal and connected in parallel with the transmission circuit to transmit a signal when the transmission circuit is abnormal; And And a second transmission / reception terminal for transmitting a signal transmitted from the transmission circuit or the bypass circuit to the antenna. 3. The method of claim 2, The transmitting circuit amplifies the input signal by the power lost in the line and transmits the signal to the antenna, and the bypass circuit sends the signal input to the first transmission / reception terminal to the second transmission / reception terminal when the transmission circuit is abnormal. Passing mobile communication system. 3. The method of claim 2, And a power difference between the first signal transmitted to the antenna through the bypass circuit and the second signal transmitted to the antenna through the transmission circuit is a power value lost from the line. 3. The method of claim 2, The transmitting circuit includes a large power amplifier for amplifying the signal received at the first transmission and reception terminal by the value lost in the line connecting the base station to the first transmission and reception terminal. The method of claim 5, The large power amplifier is. Directional couplers; A time delay filter for time delaying the signal output from the directional coupler; A phase shifter for changing the phase of the signal branched in the directional coupler; An amplifier circuit for amplifying the signal output from the phase converter; A first hybrid combiner for synthesizing the output signal of the amplifying circuit and the signal of the time delay filter; And And an isolator defining a direction of a signal output from the first hybrid combiner. The method of claim 6, The amplification circuit, A second hybrid combiner for branching the signal output from the phase shifter; A pair of amplifying units for amplifying the signals branched from the second hybrid coupler; And And a third hybrid combiner for coupling the signals output from the pair of amplification units. The method of claim 6, And a switch configured to determine a movement path of a signal transmitted and received at the first transceiver terminal and the second transceiver terminal as a transmission circuit or a bypass circuit. 3. The method of claim 2, And a receiving circuit which removes noise of a signal received by the second transmitting and receiving terminal and transmits the noise to the first transmitting and receiving terminal, wherein the receiving circuit is connected in parallel with the transmitting circuit. A first transceiver for receiving a signal transmitted through a line from a base station; An amplifier connected to the first transceiver to amplify a signal by a value lost in the line; A first bypass unit connected to the second transceiver to bypass a signal in response to an abnormality of the amplifier; A second transceiver for receiving a signal from the amplifier or bypass unit and connecting the signal to an antenna; And And a controller configured to determine a movement path of the signal as an amplifier or a first bypass unit. The method of claim 10, The tower tower amplification apparatus further comprises a first noise removing unit for transmitting the signal received by the second transceiver to the first transceiver. The method of claim 11, And a signal received by the second transceiver is bypassed from the first bypass unit to the first transceiver when the first noise canceller is abnormal. The method of claim 11, And a first receiver for receiving a signal received by the antenna, wherein the signal received by the tower tower amplifying device is simultaneously received by the second transceiver and the first receiver. The method of claim 13, A second noise removing unit removing noise of the signal received by the first receiving unit and transferring the noise to the second receiving unit; And And a second bypass unit which bypasses a signal to the second receiver when the second noise canceling unit is abnormal. 15. The method of claim 14, And the signal received by the second transceiver is bypassed to the first bypass unit when the first noise canceller is abnormal, and the signal received by the receiver is transferred to a second noise canceller. 15. The method of claim 14, And the signal received by the receiver is bypassed to the second bypass unit, and the signal received by the second transceiver is transferred to the first noise canceler. In the large power amplifier used in the tower top amplifier, Directional couplers; A time delay filter for time delaying the signal output from the directional coupler; A phase shifter for changing the phase of the signal branched in the directional coupler; An amplifier circuit for amplifying the signal output from the phase converter; A first hybrid combiner for synthesizing the output signal of the amplifying circuit and the signal of the time delay filter; And The high power amplifier of the tower top amplifier including an isolator defining the direction of the signal output from the first hybrid coupler. The method of claim 17, The amplification circuit is a large power amplifier for compensating for the value lost in the line connecting the base station and the tower top amplifier.

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