KR100379494B1 - Booster for Directional Antenna and operating method in booster - Google Patents

Abstract

The present invention relates to a booster for a directional antenna, and more particularly, to a booster for a directional antenna and an operation method thereof that can improve communication efficiency by automatically finding a base station providing a service and adjusting the direction of the antenna. The directional antenna booster may include a first antenna (pilot finder antenna) for detecting a transmission signal from a base station for a set time and angle, a second antenna (main antenna) for transmitting and receiving a signal between the base station and the mobile station, and An active booster for measuring a power intensity of a received signal received from a first antenna and generating a control signal to direct the second antenna in a direction of the largest power intensity; and receiving a control signal of the active booster and receiving the second control signal. It consists of an antenna driver for moving the direction of the antenna.

Description

Booster for directional antenna and its operation method {Booster for Directional Antenna and operating method in booster}

The present invention relates to a booster for a directional antenna, and more particularly, to a booster for a directional antenna and an operation method thereof that can improve communication efficiency by automatically finding a base station providing a service and adjusting the direction of the antenna.

In general, a booster is a device that amplifies a signal in an area where signal strength is insufficient for normal operation.

In areas where normal service to a mobile phone terminal (hereinafter abbreviated as "mobile station") is not possible, a weak auxiliary amplifier is required for the operation of the device, and generally consists of omni-directional antennas and amplifiers. Uses a bidirectional amplifier.

Hereinafter, a signal transmission method of a conventional mobile station and an antenna will be described with reference to the accompanying drawings.

1 is a block diagram illustrating a signal transmission method of a mobile station using an antenna according to the prior art.

In the conventional antenna and mobile signal transmission method, the signal input to the external antenna 1 removes the out-of-band signal from the first duplexer filter unit 2 and then obtains a constant gain from the first amplifier (AMP) 3. It is amplified to obtain a second duplexer filter section 4, and is transmitted from the second duplexer filter section 4 to the mobile station 6 which is the user's terminal.

Then, the signal transmitted from the mobile station 6 passes through the second duplexer filter unit 4 to remove the out-of-band signal, is amplified again to obtain a constant gain in the second amplifier 5, and then the first duplexer filter unit. It is transmitted to the air through (2).

2 is a diagram illustrating a propagation loss path between a mobile station and a base station using a conventional antenna.

The propagation loss path using a conventional mobile station, for example, when the base station 11 system is installed on the shore, the base station 11 provides a specific angle (φ1) and a specific serviceable distance (L1), where service is possible. The distance refers to the minimum value of the power allowed by the reception sensitivity of the mobile station 12 and the reception sensitivity of the base station 11.

Therefore, when the mobile station 12 is located outside the serviceable distance L1, the service is shared by using a booster which can improve the reception sensitivity and the transmission power of the mobile station 12.

Here, the mobile station 12 is an example of a ship on the coast, and in the ship, the omni-directional antenna is used so that the antenna radiation pattern is omni-directional (φ2), so that the service can be performed using an amplifier of the same power. The distance L2 becomes relatively short.

The signal transmission method of the conventional antenna and the mobile station has the following problems.

First, most of the boosters for mobile stations (for mobile phones) have a constant power gain of the booster itself, which can cause distortion depending on the section of the input power. In some cases, excessive output is generated in all directions to the neighboring mobile stations. It could have a bad effect.

Second, since most omnidirectional antennas with low antenna gains are adopted, relatively high output amplifiers should be used.

Third, there was a problem that technical limitations in the radio wave reach to determine the serviceable area.

An object of the present invention has been made in view of the above-mentioned problems of the prior art, by maximizing the power efficiency of the antenna by using an antenna for detecting the direction of the base station to the antenna of the mobile station and an antenna for transmitting and receiving signals with the base station It is to provide a booster for a directional antenna and a method of operating the same.

According to an aspect of the present invention for achieving the above object, a first antenna (pilot finder antenna) for detecting a transmission signal from the base station for a set time and angle, and a transmission and reception signal between the base station and the mobile station; An active booster for measuring a power intensity of a received signal received from the first antenna and a main antenna and generating a control signal to direct the second antenna in a direction of the largest power intensity; The antenna driver is configured to receive a control signal and move the direction of the second antenna.

Preferably, the active booster is a booster for amplifying the signal received by the first antenna and measuring the power strength of the received signal, and calculating the strength of the power measured by the booster, so that the second antenna has the largest power intensity. And a control unit for generating a control signal to control the antenna to have a direction in the direction. Preferably, the booster detects a transmission signal of the base station at the first antenna and receives the transmitted signal to the control unit. A first signal processor for transmitting the power strength of the received signal, and a second signal processor for processing the signal received from the second antenna and the signal of the mobile station to the control unit, and transmits a signal between the base station and the mobile station The controller controls the transmission signal strength of the base station received by the first antenna. A first input buffer for temporarily storing the signal when transmitted from the booster, a second input buffer for temporarily storing the mobile station reception power received by the second antenna, and a transmission signal of the base station received at the first and second input buffers. A central processing unit (CPU) for measuring the strength or the received power of the mobile station and storing it in a memory unit and generating a control signal for controlling the directions of the first and second antennas; A first control port for receiving an antenna control signal and transmitting a first antenna control signal to the first antenna driver, and receiving the second antenna control signal generated from the central processing unit to receive the second antenna control signal; It consists of a second control port for transmitting to the two antenna driver.

According to another aspect of the present invention for achieving the above object, the first step of determining the initial direction of the pilot detection antenna while rotating in a 360 ° direction with a directional, and the pilot signal of the base station detected by the pilot detection antenna A second step of measuring a received power of the second step; a third step of determining whether the detected pilot signal strength indication value PAD of the base station is greater than or equal to a reference value ID; and the pilot signal strength indication according to the determination result A fourth step of calculating the direction of the pilot antenna in the state as an optimum indication value when the value PAD becomes the reference value ID; and the direction of the main antenna communicating with the base station in the same direction as the optimum indication value. And a fifth step of setting to have directivity.

1 is a block diagram illustrating a signal transmission method of a mobile station using an antenna according to the related art.

2 is a diagram for explaining a propagation loss path between a mobile station and a base station using a conventional antenna;

3 is a block diagram illustrating a signal transmission method of a mobile station using a directional antenna according to the present invention.

4 is a view for explaining a radio wave radiation pattern using the directional antenna shown in FIG.

5 is a block diagram illustrating in detail the booster of the directional antenna shown in FIG.

6 is a block diagram illustrating in detail the control unit of the directional antenna shown in FIG.

7 is a flowchart for describing a method of operating a pilot detection antenna among directional antennas according to the present invention.

8 is a flowchart illustrating a method of operating a main antenna among directional antennas according to the present invention.

* Description of the symbols for the main parts of the drawings *

21: pilot detection antenna 22: main antenna

23, 24: antenna driver 25: booster

26 control unit 27 active booster

28,32 mobile station 31 base station

40: first signal processor 41, 44, 53, 57, 63, 66: band pass filter (BPF)

42, 51, 61: Local oscillator 43, 52, 58, 62, 67: Mixer

45,54,65: amplifier 46,69: detector

47,68: analog-to-digital converter 50,59: duplexer filter

55: directional coupling portion 56, 64: voltage control attenuation portion

60: second signal processing unit

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

3 is a block diagram illustrating a signal transmission method of a directional antenna and a mobile station according to the present invention.

A signal transmission method of a directional antenna and a mobile station according to the present invention relates to a signal transmission method using a booster between the directional antenna and the mobile station.

In the present invention, a pilot finder antenna 21 and a base station 31, which are first antennas for detecting a direction of a base station 31 for connecting a communication channel in a wireless section between the mobile station 32 and the base station 31, are used. ) And a first antenna driver 23 and a second antenna for controlling the antennas 21 and 22 in the direction of the base station 31 and the main antenna 22, which is a second antenna for transmitting and receiving signals between the mobile station 32 and the mobile station 32. A booster 25 for amplifying the signal received by the driver 24, the antennas 21 and 22 and reporting the strength of the received signal to the controller 26, and the reception detected by the booster 25. The control unit 26 is configured to control the first and second antenna drivers 23 and 24 by calculating the strength of the power to adjust the angles of the pilot detection antenna and the main antennas 21 and 22 to be the most efficient directions. .

Here, each of the antennas 21 and 22 uses a directional antenna having a small radiation angle in order to maximize power efficiency.

In addition, the signal amplified by the booster 25 is transmitted to the mobile station 32 connected to the booster 25 by wire. And reference numeral 27 is an active booster.

4 is a view for explaining a radio wave radiation pattern using the directional antenna shown in FIG.

The base station 31 installed at the coast provides a specific angle φ1 and a specific serviceable distance L1, where the serviceable area is a power that the reception sensitivity of the mobile station 32 and the reception sensitivity of the base station 31 allow. As a minimum, the mobile station 32 located outside the serviceable area receives a service using a booster that can improve reception sensitivity and transmission power.

In the mobile station 32 according to the present invention, a directional antenna having an excellent antenna gain compared to an omni-directional antenna is used, and a direction that is not necessary, such as a serviceable distance L2 in the transmission angle φ2, is used. Can reduce power loss, thus enabling mobile communication services farther.

5 is a block diagram illustrating in detail the booster of the directional antenna shown in FIG.

The booster 25 of the directional antenna according to the present invention detects a pilot signal from a base station and transmits a control signal to the control unit 26, and a signal and a mobile station received from the main antenna 22. And a second signal processing unit 60 which processes the signal of 28 to transmit the signal to the control unit 26 and transmits the signal to the base station 31 and the mobile station 28.

Here, the first signal processor 40 detects a pilot signal having a high frequency from the pilot detection antenna 21 for detecting a pilot signal of the base station 31, and passes the first band pass filter 41 to pass only a frequency of a predetermined band. A first mixer 43 for mixing the high frequency signal passing through the first band pass filter and the signal oscillated by the first local oscillator 42 and converting the signal into an intermediate frequency signal; and an intermediate mixed by the first mixer 43 A second band pass filter 44 for passing only a frequency signal, a first amplifier (AMP) 45 for amplifying the intermediate frequency signal passing through the second band pass filter 44 to a predetermined level, and the amplification And a first detector 46 for detecting the power of the intermediate frequency signal, and an analog / digital converter 47 for converting the detected power into digital data and transmitting the digital data to the controller 26.

In addition, the second signal processor 60 may filter out unnecessary signals among the high frequency signals received by the main antenna 22 and transmit them to the second mixer 52 or the fifth mixer for transmitting signals generated by the mobile station 28 ( A first duplexer filter unit 50 for filtering unnecessary signals among the high frequency signals transmitted from the second high frequency signal to the main antenna 22, and a high frequency signal and a second local oscillator filtered by the first duplexer filter unit 50. A second mixer 52 for mixing down the signal oscillated at 51 to downconvert to an intermediate frequency signal, and removing a frequency band of an image IMAGE component from the intermediate frequency signal mixed at the second mixer 52; The third band pass filter 53, the second amplifier 54 for amplifying a predetermined level of the intermediate frequency signal passing through the third band pass filter 53, and the amplified by the second amplifier 54 Directional coupling unit 55 for separating the signal, and the directional The second detector 69 detects an analog signal from the intermediate frequency signal separated by the summator 55, and the intermediate frequency signal and the analog signal detected by the directional coupler 55 and the second detector 69 are received. A first voltage control attenuator 56 (automatic gain control) for controlling the voltage at the receiver and an out-of-band frequency signal at the intermediate frequency output from the first voltage control attenuator 56 are removed. A third mixer 58 for mixing the fourth band pass filter 57, the signal output from the fourth band pass filter 57 and the signal output from the second local oscillator 51, and down converting the signal into a low frequency signal. ), And after receiving the converted low frequency signal from the third mixer 58, removes an image signal and transmits the image signal to the mobile station 28, or removes unnecessary signals from the low frequency signal transmitted from the mobile station 28. 4 second dew output to mixer 62 A lexer filter 59, a second analog / digital converter 68 for receiving an analog signal detected by the second detector 69, converting the analog signal into a digital signal, and transmitting the digital signal to the controller 26; A fourth mixer 62 for mixing the low frequency signal transmitted from the duplexer filter unit 59 and the signal oscillated in the third local oscillator 61 to convert the low frequency signal into an intermediate frequency signal, and converting the second frequency signal from the second mixer 62. A fifth bandpass filter 63 which removes an image component from the intermediate frequency signal, an intermediate frequency signal from which the image component is removed from the fifth bandpass filter 63, and an analog signal detected by the second detector 69 A second voltage control attenuator 64 for controlling (gain controlling) the voltage at the transmitting end, and a third amplifier 65 for amplifying a predetermined level of the intermediate frequency signal controlled by the second voltage control attenuator 64. And in the intermediate frequency signal amplified by the third amplifier 65, The sixth bandpass filter 66 which removes the extraneous signal, the intermediate frequency signal passing through the sixth bandpass filter 66 and the signal oscillated by the third local oscillator 61 are mixed to upward to a high frequency signal. It consists of the 5th mixer 67 which converts.

6 is a block diagram illustrating in detail the control unit of the directional antenna shown in FIG.

FIG. 6 shows the control unit 26 inside the active booster 25 shown in FIG. 3 in detail. The booster 25 temporarily stores the pilot strength of the base station 31 received by the pilot detection antenna when the booster 25 transmits the pilot strength. The input strength of the base station received by the input buffer 73, the second input buffer 74 for temporarily storing the mobile station reception power received by the main antenna, and the first and second input buffers 73 and 74, A central processing unit (CPU) 71 measuring the received power of the mobile station and storing it in the memory unit 72 and generating a pilot detection antenna and a control signal for controlling the direction of the main antenna; A first control port 75 for receiving a pilot detection antenna control signal generated at 71) and transmitting a pilot detection antenna control signal to the first antenna driver 23; and a main antenna control signal generated at the central processing unit 71; By receiving The second control port 76 transmits a main antenna control signal to the second antenna driver 24.

7 is a flowchart for describing a method of operating a pilot detection antenna among directional antennas according to the present invention.

The operation method of the pilot detection antenna 21 of the directional antenna according to the present invention is to determine the optimal antenna direction by operating the pilot detection antenna 21, first determine the initial direction of the pilot detection antenna 21 ( S1). At this time, when the initial direction is determined, the reference value ID and the direction of the pilot detection antenna 21 reach the initial state by the pilot signal strength indication value PAD of the base station detected by the pilot detection antenna 21. It is determined by adding the measurement unit (ISS) value of measuring the intensity of the pilot signal of the base station at the angle set while rotating the pilot detection antenna 21 using the first antenna driver 23 in the 360 ° direction. Therefore, the pilot detection antenna 21 receives the pilot signal of the base station for a set time at the set angle.

Subsequently, the reception power of the pilot signal of the base station received by the pilot detection antenna 21 is measured (S2).

Then, the measured value is stored in the memory unit 71 inside the control unit 26 (S3).

Next, it is determined whether the pilot signal strength indication value PAD of the base station detected by the pilot detection antenna 21 becomes the reference value ID (S4). In other words, it is determined whether the mobile station 32 and the base station 31 are suitable for wireless communication.

Determination result S4 If the pilot signal intensity indication value PAD is not equal to the reference value ID, the same step as the first step S1 is performed (S5). That is, the controller 26 drives the first antenna driver 23 to rotate the pilot detection antenna 21 at an angle, and measures the strength of the received power of the pilot signal of the base station received for a predetermined time (S2).

However, when the determination result S4 indicates that the pilot signal strength indication value PAD becomes the reference value ID, the optimal antenna direction, that is, the optimal indication value BDV is calculated (S6).

Next, the optimum indication value BDV is notified to the main antenna 22 (S7).

8 is a flowchart illustrating a method of operating a main antenna among directional antennas according to the present invention.

In the method of operating the main antenna 22 among the directional antennas according to the present invention, after the optimal indication value BDV measured by the pilot detection antenna 21 is determined, the controller 26 maintains the main antenna 22 in the same direction as the pilot detection antenna 21. The procedure for adjusting the antenna 22 is described.

First, the main antenna 22 does not operate and waits until the optimum indication value BDV, which is the value determined by the pilot detection antenna 21, is transmitted (S11).

As a result of determination S11, if the optimum indication value BVD is valid, the direction MAD of the main antenna is controlled in the direction of the optimum indication value BDV (S12).

Then, it is determined whether the service is possible by comparing the received power received by the main antenna 22 with the received signal strength threshold of the main antenna 22 (S13).

If it is determined that the service area is available to inform the user (S14).

However, if it is determined that the service is not available in the region, it is determined once again whether the direction of the main antenna coincides with the direction of the optimal indication value (BDV) (S15).

If the result of the determination (S15) matches, it is determined whether the service is possible by comparing the received power received by the main antenna 22 with the received signal strength threshold of the main antenna 22 (S13).

However, if the determination result (S15) does not match, the direction (MAD) of the main antenna is controlled in the direction of the optimal indication value (BDV) (S12).

Subsequently, while measuring the strength of the pilot signal for a predetermined time while rotating the pilot detection antenna 21 at the set angle as described in FIG. Adjust the direction.

As described above, in the booster of the present invention and a method of operating the same, a general mobile terminal can be used by fixing the direction of the main antenna in the direction of the base station by using an antenna capable of detecting a pilot signal generated from the base station in addition to the main antenna. Compared to the booster, it has the effect of extending the coverage area over a longer distance even at a lower power.

Claims (7)

A pilot finder antenna for detecting a transmission signal at the base station for a set time and angle; A second antenna for transmitting and receiving a signal between the base station and the mobile station; An active booster for measuring a power intensity of the received signal received by the first antenna and generating a control signal such that the second antenna has a direction in the direction of the largest power intensity; And an antenna driver for receiving a control signal of the active booster to move the direction of the second antenna. The apparatus of claim 1, wherein the active booster comprises: a booster for amplifying a signal received at the first antenna and measuring a power intensity of the received signal; And a controller configured to generate a control signal to the antenna driver to control the second antenna to have direction in the direction of the largest power intensity by calculating the intensity of the power measured by the booster. 3. The apparatus of claim 2, wherein the booster detects a transmission signal of the base station in the first antenna and transmits a power strength of the received signal that receives the transmitted signal to the controller, and the second antenna. And a second signal processor for processing the signal received from the signal of the mobile station and transmitting the signal of the mobile station to the controller and transmitting a signal between the base station and the mobile station. 3. The method of claim 2, wherein the control unit temporarily stores the first input buffer for temporarily storing the transmission signal strength of the base station received by the first antenna when the booster and the mobile station received power received by the second antenna. To measure the second input buffer, the strength of the transmission signal of the base station received by the first and second input buffer, and the received power of the mobile station to store in the memory, and to control the direction of the first and second antenna A central processing unit (CPU) for generating a control signal for the first signal; a first control port for receiving a first antenna control signal generated by the central processing unit and transmitting a first antenna control signal to the first antenna driver; And a second control port configured to receive the second antenna control signal generated by the processing apparatus and transmit the second antenna control signal to the second antenna driver. For a directional antenna booster Gong. A first step of determining an initial direction of the pilot detection antenna while directionally rotating in a 360 ° direction; A second step of measuring a reception power of a pilot signal of a base station detected by the pilot detection antenna; Determining whether the detected pilot signal strength indication value PAD of the base station is equal to or greater than a reference value ID; A fourth step of calculating a direction of the pilot antenna in the state as an optimal indication value when the pilot signal strength indication value PAD reaches a reference value ID according to the determination result; And a fifth step of setting a direction of a main antenna in wireless communication with the base station so as to have a direction in the same direction as the optimum indication value. 6. The method of claim 5, wherein the determining of the initial direction comprises: a pilot signal strength indication value PAD of the base station detected by the pilot detection antenna and a reference value ID and a direction of the pilot detection antenna reaching an initial initial state. Rotating the pilot antenna in a 360 ° direction until And adding the measurement unit (ISS) value of measuring the strength of the pilot signal of the base station at an angle set while rotating the pilot detection antenna. The method of claim 5, wherein the fifth step comprises: determining whether the optimum indication value BVD is valid; Comparing the received power received by the main antenna with a received signal strength threshold of the main antenna; And informing the user of the result of the determination when the threshold value is greater than or equal to the threshold.