KR101901902B1 - Repeater for mobile communication and Automatic gain setting method thereof - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication relay apparatus, and more particularly, to a mobile communication relay apparatus capable of automatically setting a power amplification gain of an output signal according to an environment change. A mobile communication repeater according to an embodiment of the present invention includes a power amplifier for amplifying a received communication signal according to a preset power amplification gain, a power detector for generating power information of the amplified communication signal, And changing the power threshold value to correspond to the power information when the threshold value is exceeded, and setting the power amplification gain to correspond to the power threshold value. The mobile communication repeater according to the present invention can automatically set the tamping gain by using the power information of the received communication signal so that the manufacturing cost is low and the isolation between the link antenna and the service antenna is maximized .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a mobile communication relay apparatus and an automatic gain setting method thereof,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication relay apparatus, and more particularly, to a mobile communication relay apparatus capable of automatically setting a power amplification gain of an output signal according to an environment change.

Generally, in order to expand the service coverage of the base station or to improve the service quality, the repeater is used in a radio wave shadow area where the signal intensity is weak or the signal is difficult to reach. An example of a relay apparatus is a radio frequency (RF) relay apparatus. The RF relay apparatus receives a base station signal transmitted from a base station through a link antenna, amplifies the received base station signal, And then transmits the amplified signal to the base station via the link antenna, thereby relaying the communication between the base station and the terminal.

The RF repeater has an advantage in that it is easy to install because it wirelessly transmits and receives signals through the link antenna and the service antenna to the base station and the user terminal respectively. However, due to the interference between the link antenna and the service antenna, There is a problem that the output gain is limited due to deterioration, repeated reception of the deteriorated signal, and oscillation due to the amplification. Also, due to the spatial restriction due to the demand for miniaturization, the isolation between the link antenna and the service antenna It is difficult to secure a sufficient strength.

As an alternative to this, an interference cancellation relay apparatus has been proposed. The interference cancellation repeater estimates signals that are interfered signals (e.g., signals radiated through a service antenna (or link antenna)) through multiple paths and re-input to the link antenna (or service antenna) There is an advantage that the degree of isolation can be increased by removing interference signals from an input signal. However, the interference cancellation repeater is disadvantageous in that the manufacturing cost is high due to the addition of components for removing the interference signal.

Therefore, there is a need for a mobile communication relay apparatus which can secure isolation between a link antenna and a service antenna with a low manufacturing cost.

An aspect of the present invention is to provide a mobile communication relay apparatus capable of maximally securing isolation between a link antenna and a service antenna with a low manufacturing cost.

According to an embodiment of the present invention, there is provided a power amplifying apparatus including: a power amplifier for amplifying a received communication signal according to a predetermined power amplification gain; A power detector for generating power information corresponding to the amplified communication signal; And a power determination unit configured to change the power threshold value to correspond to the power information when the power information exceeds a preset power threshold value and set the power amplification gain to correspond to the power threshold value, A relay apparatus is disclosed.

According to an embodiment, the power amplifier amplifies a received test signal according to an initial power amplification gain, and the power detector generates test power information corresponding to the amplified test signal, To set the power threshold value.

According to an embodiment, the power detector generates the test power information for each unit frequency interval corresponding to the test signal, and the power determiner uses the test power information for each unit frequency interval to calculate the power The threshold value can be set.

According to an embodiment, the power determination unit may set the power threshold value using the test power information generated for a predetermined time.

According to an embodiment, the power determination unit may set the power threshold value using the test power information generated until a predetermined data capacity is reached.

According to an embodiment, the power detector generates the power information for each unit frequency interval corresponding to the communication signal, and the power determiner compares the power threshold set for each unit frequency interval with the power information, The power threshold and the unit frequency interval of the power information may be the same.

According to an embodiment, the power determination unit may change the power threshold value to correspond to the power information when the power information exceeds a predetermined threshold time in a state where the power information exceeds the power threshold value.

If the maximum power information is less than the power threshold value, the power determining unit may determine the maximum power information in a predetermined time interval if the power information is less than the preset power threshold value, It can be changed to correspond to the power information.

According to another embodiment of the present invention, there is provided a power amplification gain setting method performed in a mobile communication repeater, comprising: amplifying a received communication signal according to a preset power amplification gain; Generating power information corresponding to the amplified communication signal; Changing the power threshold value to correspond to the power information if the power information exceeds a predetermined power threshold value; And setting the power amplification gain to correspond to the power threshold value.

According to an embodiment, the power amplification gain setting method includes: amplifying a received test signal according to an initial power amplification gain; Generating test power information corresponding to the amplified test signal; And setting the power threshold value using the test power information.

According to an embodiment of the present invention, the step of generating the test power information includes generating the test power information for each unit frequency interval corresponding to the test signal, wherein the step of setting the power threshold comprises: And setting the power threshold value for each unit frequency interval using the test power information for each frequency interval.

According to an embodiment of the present invention, the step of generating the test power information includes generating the test power information for a preset time, and the step of setting the power threshold may include: And setting the power threshold value using the test power information.

According to an embodiment, the step of generating the test power information includes generating the test power information until a preset data capacity is reached, wherein the step of setting the power threshold comprises: And setting the power threshold value using the test power information generated until the capacity is reached.

According to an embodiment, the step of generating the power information may include generating the power information for each unit frequency interval corresponding to the communication signal, and the step of changing the power threshold value to correspond to the power information may include: And comparing the power threshold value with the power threshold value set for each unit frequency interval, wherein the compared power threshold value and the unit frequency interval of the power information may be the same.

According to an embodiment of the present invention, the step of changing the power threshold value to correspond to the power information may further include changing the power threshold value to the power information if the power information exceeds a predetermined threshold value in a state where the power information exceeds the power threshold value And correspondingly modifying the data.

According to an embodiment, the power amplification gain setting method includes: extracting maximum power information of a predetermined time interval if the power information is less than a predetermined power threshold value; And changing the power threshold value to correspond to the maximum power information if the maximum power information is less than the power threshold value.

According to another embodiment of the present invention, there is provided a computer-readable recording medium storing a program for causing a computer to execute a power amplification gain setting method performed in the mobile communication repeater.

The mobile communication repeater according to the present invention can maximize the isolation between the link antenna and the service antenna with a low manufacturing cost.

BRIEF DESCRIPTION OF THE DRAWINGS A brief description of each drawing is provided to more fully understand the drawings recited in the description of the invention.
1 is a block diagram of a mobile communication system according to an embodiment of the present invention.
2 is a block diagram of a mobile communication relay apparatus according to an embodiment of the present invention.
3 is an exemplary diagram illustrating a power threshold value per unit frequency of a communication signal set according to an embodiment of the present invention.
4 is a flowchart of a method for setting a power amplification gain using a test signal according to an embodiment of the present invention.
5 is a flowchart of a method of setting a power amplification gain using a communication signal according to an embodiment of the present invention.
6 is a flowchart of a method of setting a power amplification gain using a communication signal according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The mobile communication relay apparatus according to an embodiment of the present invention can support a mobile communication service used worldwide. For example, the mobile communication repeater may be a service for frequencies such as Very High Frequency (VHF), Ultra-High Frequency (UHF), 700 MHz, 800 MHz, 850 MHz, 900 MHz, 1900 MHz, 2100 MHz, . In addition, the mobile communication repeater can be classified into an Advanced Mobile Phone Service (AMPS), a digital Time Division Multiplexing Access (TDMA), a Code Division Multiple Access (CDMA) , Asynchronous CDMA (Wideband Code Division Multiple Access), HSDPA, Long Term Evolution (LTE), Long Term Evolution Advanced (LTE-A) And the like.

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

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

Referring to FIG. 1, a mobile communication system 100 according to an embodiment of the present invention may include a base station 110, a mobile communication repeater 120, and a mobile communication terminal 130.

The mobile communication repeater 120 may amplify the communication signal received through the link antenna LA in the downlink and transmit the amplified communication signal to the mobile communication terminal 130 via the service antenna SA. In this case, the input communication signal may include an interference signal in which a base station signal transmitted from the base transceiver station (BTS) 110 and signals radiated through the service antenna SA are re-input to the link antenna LA. As the base station signal and the interference signal are amplified together by a high output amplifier (not shown) formed in the mobile communication repeater 120, the mobile communication repeater 120 can be oscillated.

In the case of the uplink, the mobile communication repeater 120 may amplify the communication signal received through the service antenna SA and transmit the amplified communication signal to the base station 110 through the link antenna LA. In this case, the input communication signal may include an interference signal in which a terminal signal transmitted from the mobile communication terminal 130 and signals radiated through the link antenna LA are re-input to the service antenna SA. The mobile communication repeater 120 can be oscillated as the terminal signal and the interference signal are amplified together by a high output amplifier (not shown) formed in the mobile communication repeater 120. [

The mobile communication relay device 120 may analyze the input communication signal to prevent oscillation and automatically change the gain of the high output amplifier according to the analysis result. Hereinafter, the automatic gain setting operation for preventing the oscillation of the mobile communication repeater 120 will be described in detail with reference to FIGS. 2 and 3. FIG.

2 is a block diagram of a mobile communication relay apparatus according to an embodiment of the present invention.

2, the mobile communication repeater 120 includes a power amplifier 210, a directional coupler 220, a down-converter 230, a filter 240, A power determination unit 260, a storage unit 270, an alarm output unit 280, and an antenna unit 290. The detection unit 250 may include a power detection unit 260, Although not shown in FIG. 2, the mobile communication repeater 120 may further include a signal receiving unit (not shown), a filter for removing a noise signal, and the like.

Hereinafter, an automatic gain setting operation for preventing the oscillation of the mobile communication repeater 120 will be described on the assumption that the communication signal is a downlink signal. Here, the communication signal may be a signal including a base station signal (a terminal signal in the case of an uplink signal) and an interference signal. Also, the communication signal may not include the interference signal in some cases.

First, the communication signal received by the mobile communication repeater 120 may be amplified by the power amplifier 210 after the noise signal is removed. That is, the power amplifier 210 can amplify the communication signal from which the noise signal has been removed according to a preset power amplification gain (GAIN). The communication signal amplified by the power amplifier 210 may be output to the directional coupler 220.

The directional coupler 220 can output a part of the input communication signal to the antenna unit 290 and output the remaining part of the communication signal to the down-conversion unit 230. The directional coupler 220 may include a coupler for branching the input signal. Hereinafter, a signal output to the antenna unit 290 of the communication signal will be referred to as a first communication signal, and a signal output to the down-conversion unit 230 as a communication signal will be referred to as a second communication signal.

The antenna unit 290 may transmit the first communication signal to the mobile communication terminal 130 through an antenna provided with the first communication signal.

The down conversion unit 230 may convert the input second communication signal into a low frequency signal for easy analysis and output the signal to the filter unit 240. The down-converter 230 may include a down-converter.

The filter unit 240 may divide the second communication signal input from the down-converting unit 230 into a predetermined unit frequency interval and output the divided second communication signal to the power detector 250. [ For example, it is assumed that the unit frequency interval is preset to 1 [Mhz]. At this time, the filter unit 240 may divide the second communication signal by 1 [Mhz] and output it to the power detector 250. That is, the filter unit 240 may filter the interval of 0 [Mhz] to 1 [Mhz] of the second communication signal and output it to the power detector 250. In addition, the filter unit 240 may filter the interval of 1 [Mhz] to 2 [Mhz] of the second communication signal and output it to the power detector 250. Also, the filter unit 240 may filter the n-1 [Mhz] through the n [Mhz] sections of the second communication signal and output the filtered signals to the power detector 250 (n is a predetermined natural number). Accordingly, the filter unit may divide the second communication signal into n unit frequency intervals and output the result to the power detector 250. [

The power detection unit 250 may generate power information corresponding to the second communication signal and output the generated power information to the power determination unit 260. At this time, the power detector 250 may generate power information for each of the n second communication signals for each unit frequency interval and output the generated power information to the power determiner 260. For example, the power detector 250 may generate the first power information for the second communication signal corresponding to the first unit frequency interval and output the first power information to the power determiner 260. Also, the power detector 250 may generate second power information for the second communication signal corresponding to the second unit frequency interval, and may output the generated second power information to the power determiner 260. Also, the power detector 250 may generate the n-th power information for the second communication signal corresponding to the n-th unit frequency interval and output the generated power information to the power determiner 260.

Here, the first unit frequency interval may be a unit frequency interval corresponding to the lowest frequency among n unit frequency intervals, and the n-th unit frequency interval may be a unit frequency interval corresponding to the highest frequency among the n unit frequency intervals .

Also, the power information may include information on the average power, the maximum power, the average voltage, the maximum voltage, and the like of the second communication signal inputted for a predetermined time. That is, the power detector 250 may generate the power information for the average power and / or the maximum power of the second communication signal input for a predetermined time, and output the generated power information to the power determiner 260. In particular, the power detector 250 may generate power information per unit frequency interval corresponding to the second communication signal and output the generated power information to the power determiner 260.

For example, the power detector 250 may generate the first power information corresponding to the first unit frequency interval and output the first power information to the power determiner 260. The power detector 250 may generate the second power information corresponding to the second unit frequency interval and output the generated second power information to the power determiner 260. Also, the power detector 250 may generate the n-th power information corresponding to the n-th unit frequency interval and output the generated n-th power information to the power determiner 260. Here, the n-th power information may be power information corresponding to the n-th unit frequency interval of the power information for the second communication signal input for a predetermined time.

The power determination unit 260 may store the input power information in the storage unit 270. [ In particular, the power determination unit 260 may store the first power information to the nth power information in the storage unit 270.

Also, the power determination unit 260 may compare the power information with a preset power threshold to set a power amplification gain. In particular, the power determination unit 260 may compare the power threshold value set for each unit frequency interval with the power information input for each unit frequency interval to set a power amplification gain for each unit frequency interval. At this time, the compared power threshold value and the unit frequency interval of the power information may be the same. That is, the power determination unit 260 may compare the n-th power information with a preset n-th power threshold to set the n-th power amplification gain.

For example, the power determination unit 260 may change the n-th power threshold value to correspond to the n-th power information when the n-th power information exceeds the n-th power threshold, It can be changed and set so as to correspond to the threshold value. At this time, if the nth power information exceeding the nth power threshold value is received for a predetermined threshold time, the power determination unit 260 may change the nth power threshold value to correspond to the nth power information. This is to prevent the oscillation by lowering the n-th power amplification gain to correspond to the increased n-th power threshold value because the n-th power threshold is increased to correspond to the n-th power information. The reason why the n-th power information exceeding the n-th power threshold is determined to be received for a predetermined threshold time is that if the n-th power information exceeding the n-th power threshold is temporarily received, the n-th power threshold So as not to change it.

For example, if the n-th power information is less than the n-th power threshold value, the power determination unit 260 may extract maximum power information of a predetermined time period. If the preset time interval is 10 minutes, the power determination unit 260 can read the n-th power information stored in the last time for 10 minutes from the storage unit 270, The nth power threshold value may be compared with the nth power maximum information (hereinafter, referred to as 'nth maximum power information') (in this case, the nth power threshold value may be information on the voltage). The power determination unit 260 may change the n-th power threshold value to correspond to the n-th maximum power information when the n-th maximum power information is less than the n-th power threshold value.

Then, the power determination unit 260 may change the n-th power amplification gain to correspond to the changed n-th power threshold value. This is to increase the n-th power amplification gain to correspond to the lowered n-th power threshold value because the n-th power threshold is lowered to correspond to the n-th maximum power information. That is, when the n-th power information exceeding the n-th power threshold value is input, the power determination unit 260 determines that there is a risk of oscillation by receiving the interference signal, thereby lowering the n-th power amplification gain. On the contrary, if the n-th power information exceeding the n-th power threshold value is not input, the power determination unit 260 may increase the n-th power amplification gain and widen the coverage of the mobile communication repeater 120. At this time, the reference for how much the nth power amplification gain is to be changed may be the fluctuation range of the nth power threshold value.

Then, the power determination unit 260 may activate the alarm output unit 280 to inform the manager that the nth power threshold and / or the nth power amplification gain has been changed.

The alarm output unit 280 may generate change information for notifying that the nth power threshold and / or the nth power amplification gain has been changed, and may transmit the change information to the terminal or the like of the administrator when the power determination unit 260 is activated. In this case, the alarm output unit 280 may include communication means for transmitting the change information. Also, the alarm output unit 280 outputs an alarm sound through a speaker provided to notify that the nth power threshold and / or the nth power amplification gain has been changed when the power determiner 260 is activated, And outputting it via the display means. Accordingly, the manager of the mobile communication repeater 120 can recognize that the nth power threshold and / or the nth power amplification gain has been changed.

In the above description, the power amplifier 210 is generally referred to as amplifying the input communication signal according to the power amplification gain. However, the power amplifier 210 may include n high-power amplifiers, and each high-power amplifier may amplify an input communication signal by n unit frequency intervals. The first high power amplifier of the power amplifier 210 may amplify only a signal corresponding to the first unit frequency interval of the communication signal according to the first power amplification gain. Also, the second high-power amplifier of the power amplifier 210 may amplify only a signal corresponding to the second unit frequency interval of the communication signal according to the second power amplification gain. The n-th high power amplifier of the power amplifier 210 may amplify only a signal corresponding to the n-th unit frequency interval of the communication signal according to the n-th power amplification gain.

The communication signals amplified by the power amplifier 210 may be combined with each other and output to the directional coupler 220. Or a part of the communication signal amplified by the power amplifier 210 may be output to the down-converter 230 and the power detector 250 through the directional coupler 220, respectively. In this case, it is obvious that the filter unit 240 of FIG. 2 may be omitted, and a filter unit capable of separating the communication signal by the unit frequency may be connected to the input terminal of the power amplifier unit 210.

As described above, the mobile communication repeater 120 according to an exemplary embodiment of the present invention analyzes the power of an input communication signal and can automatically reset the power amplification gain according to the analysis result. Therefore, The maximum degree of isolation can be ensured. In addition, the mobile communication repeater 120 according to an exemplary embodiment of the present invention analyzes the communication signal according to a preset unit frequency interval, and can automatically set a different power amplification gain for each unit frequency interval according to a result of the analysis. Therefore, even if the frequency and / or the power of the input communication signal is changed by changing the location where the mobile communication repeater 120 is installed, the mobile communication repeater 120 automatically resets the power amplification gain suitable for the changed communication environment, You can do it.

Meanwhile, the mobile communication relay device 120 may store the power information in the storage unit 270 through a test step before being connected to the communication network. For example, the mobile communication repeater 120 may generate the first test power information to the nth test power information using the input test signal, and then store the first test power information to the nth test power information in the storage unit 270. Here, the test signal may be a signal arbitrarily inputted by the manager, not the communication signal received by the base station 110. [ The operation in which the mobile communication repeater 120 generates the test power information using the test signal is similar to the operation of generating the power information using the communication signal. (Hereinafter referred to as 'initial power amplification gain') set before the test signal is input is a value set by the manager.

Therefore, when the initial test signal is input, the mobile communication repeater 120 amplifies the test signal according to the initial power amplification gain, and generates and stores test tack information corresponding to the amplified test signal. For example, the power amplifier 210 of the mobile communication repeater 120 can amplify and output a test signal according to the initial power amplification gain. At this time, the power amplifier 210 may amplify the test signal by a preset unit frequency interval. At this time, the first to n-th initial power amplification gains may be the same. Here, the first initial power amplification gain may be an initial power amplification gain corresponding to the first unit frequency section, and the n-th initial power amplification gain may be an initial power amplification gain corresponding to the n-th unit frequency section.

The directional coupler 220 may output a portion of the input test signal (hereinafter, referred to as a second test signal) to the down-converter 230. The down conversion unit 230 may convert a part of the input second test signals into a low frequency signal for easy analysis and output the converted signal to the filter unit 240. The filter unit 240 may divide the second test signal input from the down-converting unit 230 into a predetermined unit frequency interval and output the divided second test signal to the power detector 250.

The power detector 250 may generate power information corresponding to the second test signal and output the generated power information to the power determiner 260. At this time, the power detector 250 may generate power information for each of the n test signals for each of n unit frequency intervals input per unit frequency interval, and may output the power information to the power determiner 260. For example, the power detector 250 may generate first test power information for a second test signal corresponding to the first unit frequency interval, and may output the first test power information to the power determiner 260. Also, the power detector 250 may generate second test power information for the second test signal corresponding to the second unit frequency interval, and may output the second test power information to the power determiner 260. Also, the power detector 250 may generate nth test power information for the second test signal corresponding to the n-th unit frequency interval, and may output the nth test power information to the power determiner 260. [

The power determination unit 260 may receive n test power information and store the received information in the storage unit 270. Further, when it is determined that the predetermined condition is satisfied and the test is completed, the power determination unit 260 can set a power threshold for each unit frequency interval and set a power amplification gain for each unit frequency interval according to the set power threshold value .

For example, the power determination unit 260 may determine that a predetermined condition is satisfied when a preset time comes after the first test signal is input. For example, the power determination unit 260 may determine that the predetermined condition is satisfied when the capacity [MB] of the stored test power information exceeds the preset data capacity [MB].

When the test is completed, the power determination unit 260 may set a power threshold value for each unit frequency interval using the first test power information to the nth test power information stored in the storage unit 270 during the test. For example, the power determination unit 260 may set information corresponding to the maximum voltage among the first test power information stored in the storage unit 270 as a first power threshold value. Also, the power determination unit 260 may set information corresponding to the maximum voltage among the nth test power information stored in the storage unit 270 as the nth power threshold value.

Also, the power determination unit 260 may set the power amplification gain to correspond to the set power threshold value. For example, the power determination unit 260 may set the first power amplification gain to correspond to the first power threshold value. The first power amplification gain may be a gain of a communication signal set to the power amplifier 210 so that a communication signal (a signal corresponding to the first unit frequency interval of the communication signal) equal to or higher than the first power threshold value can not be output. The power determination unit 260 may set the nth power amplification gain to correspond to the nth power threshold value. The nth power amplification gain may be a gain of a communication signal set in the power amplifier 210 so that a communication signal having a power level equal to or higher than the nth power threshold value (a signal corresponding to the nth unit frequency section of the communication signal) can not be output.

Then, the mobile communication repeater 120 may be connected to the mobile communication network and analyze the input communication signal according to the installed environment to automatically increase or decrease the power amplification gain for each unit frequency interval.

3 is an exemplary diagram illustrating a power threshold value per unit frequency of a communication signal set according to an embodiment of the present invention.

Referring to FIG. 3, a case where the unit frequency interval is preset to 1 [Mhz] is exemplified. The power thresholds Th1 to Th4 may be set differently for each unit frequency interval and the power amplification gain may be set differently for each unit frequency interval according to the power thresholds set differently. Therefore, the mobile communication repeater 120 can separate the received communication signals by unit frequency intervals and amplify them separately.

In the above description, the case where the power amplification gain is set for each predetermined unit frequency section is mainly described, but the power amplification gain may not be set for each unit frequency section. In this case, one power amplification gain can be set based on the largest value among the n power threshold values per unit frequency section.

4 is a flowchart of a method for setting a power amplification gain using a test signal according to an embodiment of the present invention.

Hereinafter, a method of setting a power amplification gain using a test signal according to an embodiment of the present invention will be described with reference to FIG. Each of the steps to be described below may be performed in each component of the mobile communication relay apparatus 120 described with reference to FIG. 2, but is generally referred to as being performed in the mobile communication relay apparatus 120 for convenience of explanation and explanation Explain. Therefore, the subject performing each of the following steps may be omitted.

In step S410, the mobile communication repeater 120 can receive the test signal.

In step S420, when the initial test signal is input, the mobile communication repeater 120 amplifies the test signal according to the initial power amplification gain, generates power information of the test signal using a part of the amplified test signal, It can be stored in storage space. At this time, the mobile communication repeater 120 may amplify the test signal for each predetermined frequency interval. Also, the mobile communication repeater 120 may generate and store test power information for each predetermined frequency interval. Here, the operation of the mobile communication repeater 120 to generate and store the test power information for each unit frequency interval may be the same as or similar to the operation described with reference to FIG. 2, and a detailed description thereof will be omitted here.

In step S430, the mobile communication repeater 120 can set a power threshold value per unit frequency interval when it is determined that the preset conditions are satisfied and the test is completed (step S440). For example, the mobile communication repeater 120 may determine that a preset condition is satisfied when a preset time comes after the first test signal is input. For example, the mobile communication repeater 120 may determine that the predetermined condition is satisfied when the capacity [MB] of the stored test power information exceeds the preset data capacity [MB]. Also, if it is determined that the test is completed, the mobile communication repeater 120 may set information corresponding to the maximum voltage among the power information for each unit frequency section as a power threshold value of the unit frequency section.

In step S450, the mobile communication repeater 120 can set the power amplification gain to correspond to the set power threshold value. For example, the mobile communication repeater 120 may set the first power amplification gain to correspond to the first power threshold value. Also, the mobile communication repeater 120 may set the n-th power amplification gain to correspond to the n-th power threshold value.

5 is a flowchart of a method of setting a power amplification gain using a communication signal according to an embodiment of the present invention.

Hereinafter, a method of setting a power amplification gain using a communication signal according to an embodiment of the present invention will be described with reference to FIG. Each of the steps to be described below may be performed in each component of the mobile communication relay apparatus 120 described with reference to FIG. 2, but is generally referred to as being performed in the mobile communication relay apparatus 120 for convenience of explanation and explanation Explain. Therefore, the subject performing each of the following steps may be omitted.

In step S510, the mobile communication repeater 120 is connected to the mobile communication network and can receive the communication signal.

In step S520, the mobile communication repeater 120 may generate power information for each unit frequency interval. For example, when the communication signal is input, the mobile communication repeater 120 may amplify the communication signal according to a preset power amplification gain, and generate power information of the communication signal using a part of the amplified communication signal. At this time, the mobile communication repeater 120 may amplify a communication signal by a preset unit frequency interval. Also, the mobile communication repeater 120 may generate and store power information for each predetermined frequency interval. Here, the operation of generating the power information for each unit frequency interval by the mobile communication repeater 120 may be the same as or similar to the operation described with reference to FIG. 2, and a detailed description thereof will be omitted here.

In step S530, the mobile communication repeater 120 can compare the power threshold value set for each unit frequency interval with the power information generated for each unit frequency interval. At this time, the compared power threshold value and the unit frequency interval of the power information may be the same. If the n < th > power information is less than the n < th > power threshold as a result of the comparison in step S530, the steps after step S610 described with reference to FIG. 6 may be performed. If the n-th power information exceeds the n-th power threshold as a result of the comparison in step S530, the mobile communication repeater 120 may determine whether the n-th power information exceeding the n-th power threshold is received for a predetermined threshold time (Step S540). This is so as not to change the nth power threshold value when the nth power information exceeding the nth power threshold is temporarily received.

In step S550, when the n-th power information exceeding the n-th power threshold value is received for a predetermined threshold time, the mobile communication relay device 120 may change the n-th power threshold value to correspond to the n-th power information. Also, the mobile communication repeater 120 may change and set the nth power amplification gain so as to correspond to the changed nth power threshold value. This is to prevent the oscillation by lowering the n-th power amplification gain to correspond to the increased n-th power threshold value because the n-th power threshold is increased to correspond to the n-th power information.

In step S560, the mobile communication repeater 120 may output an alarm to notify that the nth power threshold and / or the nth power amplification gain has been changed.

Meanwhile, although not shown in FIG. 5, the mobile communication repeater 120 may store n pieces of power information generated for each unit frequency interval in a storage space.

6 is a flowchart of a method of setting a power amplification gain using a communication signal according to another embodiment of the present invention.

Hereinafter, a method of setting a power amplification gain using a communication signal according to an embodiment of the present invention will be described with reference to FIG. Each of the steps to be described below may be performed in each component of the mobile communication relay apparatus 120 described with reference to FIG. 2, but is generally referred to as being performed in the mobile communication relay apparatus 120 for convenience of explanation and explanation Explain. Therefore, the subject performing each of the following steps may be omitted.

In step S610, if the n-th power information is less than the n-th power threshold as a result of the comparison in step S530, the mobile communication repeater 120 can extract the maximum power information of the preset time period. When the preset time interval is 10 minutes, the mobile communication relay device 120 can read the n-th power information stored in the last 10 minutes from the storage space, and the maximum of the n-th power information The n-th power threshold value may be compared with the maximum power information having the largest voltage (in this case, the n-th power threshold value may be information on the voltage) (step S620).

In step S630, if the n-th maximum power information is less than the n-th power threshold as a result of the comparison in step S620, the mobile communication repeater 120 may change the n-th power threshold value to correspond to the n-th maximum power information. Also, the mobile communication repeater 120 may change and set the nth power amplification gain so as to correspond to the changed nth power threshold value. This is to increase the n-th power amplification gain to correspond to the lowered n-th power threshold value because the n-th power threshold is lowered to correspond to the n-th maximum power information.

In step S640, the mobile communication repeater 120 may output an alarm to notify that the nth power threshold and / or the nth power amplification gain have been changed.

In the above description, the case where the power amplification gain is set for each predetermined unit frequency section is mainly described, but the power amplification gain may not be set for each unit frequency section. In this case, one power amplification gain can be set based on the largest value among the n power threshold values per unit frequency section.

The power amplification gain setting method in the mobile communication repeater according to the present invention can be implemented as a computer readable code on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording media storing data that can be decoded by a computer system. For example, it may be a ROM (Read Only Memory), a RAM (Random Access Memory), a magnetic tape, a magnetic disk, a flash memory, an optical data storage device, or the like. In addition, the computer-readable recording medium may be distributed and executed in a computer system connected to a computer network, and may be stored and executed as a code readable in a distributed manner.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that various modifications and changes may be made.

100: mobile communication system
110: base station
120: mobile communication relay device
130: mobile communication terminal
210:
220: directional coupler
230:
240:
250: Power detector
260:
270:
280: Alarm output unit
290:

Claims (17)

A power amplifier for amplifying a received communication signal according to a predetermined power amplification gain;
A power detector for generating power information corresponding to the amplified communication signal; And
A power determination unit that changes the power threshold value to correspond to the power information when the power information exceeds a predetermined power threshold value and sets the power amplification gain to the power threshold value;
, ≪ / RTI &
The power amplifier amplifies the received test signal according to the initial power amplification gain,
Wherein the power detector generates test power information for each unit frequency interval corresponding to the amplified test signal,
And the power determination unit sets the power threshold value for each unit frequency interval using the test power information for each unit frequency interval.
delete delete The method according to claim 1,
Wherein the power determination unit sets the power threshold using the test power information generated for a predetermined time.
The method according to claim 1,
Wherein the power determination unit sets the power threshold value using the test power information generated until a predetermined data capacity is reached.
The method according to claim 1,
Wherein the power detector generates the power information for each unit frequency interval corresponding to the communication signal,
Wherein the power determination unit compares the power threshold value and the power threshold value set for each unit frequency interval, and the power threshold value and the unit frequency interval of the power information are compared.
The method according to claim 1,
Wherein the power determination unit changes the power threshold value to correspond to the power information when the power information exceeds a predetermined threshold time in a state where the power information exceeds the power threshold value.
The method according to claim 1,
Wherein the power determination unit extracts maximum power information of a predetermined time interval if the power information is less than a preset power threshold and sets the power threshold to a value corresponding to the maximum power information if the maximum power information is less than the power threshold To the mobile communication terminal.
A power amplification gain setting method performed in a mobile communication repeater,
Amplifying the received communication signal according to a predetermined power amplification gain;
Generating power information corresponding to the amplified communication signal;
Changing the power threshold value to correspond to the power information if the power information corresponding to the communication signal exceeds a predetermined power threshold value;
Setting the power amplification gain to correspond to the power threshold;
, ≪ / RTI &
Amplifying the received test signal according to the initial power amplification gain;
Generating test power information for each unit frequency interval corresponding to the amplified test signal;
Setting a power threshold value for each unit frequency interval using the test power information for each unit frequency interval;
Further comprising the steps of:
delete delete 10. The method of claim 9,
Wherein the step of generating the test power information comprises:
Generating the test power information for a predetermined time;
Lt; / RTI >
Wherein setting the power threshold comprises:
Setting the power threshold value using the test power information generated during the predetermined time;
Wherein the power amplifying gain setting method comprises:
10. The method of claim 9,
Wherein the step of generating the test power information comprises:
Generating the test power information until a predetermined data capacity is reached;
Lt; / RTI >
Wherein setting the power threshold comprises:
Setting the power threshold value using the test power information generated until a preset data capacity is reached;
Wherein the power amplifying gain setting method comprises:
10. The method of claim 9,
Wherein the generating the power information comprises:
And generating the power information for each unit frequency interval corresponding to the communication signal,
Wherein the modifying the power threshold value to correspond to the power information comprises:
Comparing the power threshold and the power information set for each unit frequency interval;
, ≪ / RTI &
Wherein the compared power threshold and the unit frequency interval of the power information are the same.
10. The method of claim 9,
Wherein the modifying the power threshold value to correspond to the power information comprises:
Changing the power threshold value to correspond to the power information if the power information exceeds a predetermined threshold time in a state where the power information exceeds the power threshold value;
Wherein the power amplifying gain setting method comprises:
10. The method of claim 9,
Extracting maximum power information of a predetermined time interval if the power information is less than a preset power threshold value; And
Changing the power threshold value to correspond to the maximum power information if the maximum power information is less than the power threshold value;
And outputting the power amplification gain setting signal.
A computer-readable recording medium having recorded thereon a program for causing a computer to execute a method of setting a power amplification gain performed in a mobile communication relay device according to any one of claims 9 to 12.

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