KR100985494B1 - Method and apparatus for detecting reverse gradual failure of repeater - Google Patents

Abstract

Disclosed are a method for detecting reverse degradation of a repeater and an apparatus thereof. The reverse degradation detection method of the repeater according to an embodiment of the present invention comprises the steps of setting the reverse gain to the maximum; Measuring a degradation detection level for the reverse maximum gain at a reverse final output stage; Calculating a degradation determination value corresponding to a difference between an initial value of a preset steady state at the reverse maximum gain and the measured degradation detection level; And comparing the calculated deterioration determination value with a preset reference value and determining that the deterioration determination value is a deterioration of the repeater if the deterioration determination value is greater than or equal to the reference value.

Repeater, Reverse, Degradation Detection, Thermal Noise, Pilot Signal

Description

Reverse degradation detection method of repeater and device therefor {METHOD AND APPARATUS FOR DETECTING REVERSE GRADUAL FAILURE OF REPEATER}

The present invention relates to a reverse degradation detection, and more particularly, to a reverse degradation detection method and apparatus for a repeater capable of quickly confirming the reverse degradation while minimizing the change in the repeater system.

In general, various mobile communication systems including mobile phones and personal mobile communication are largely comprised of a mobile switching center, a base station transceiver subsystem, and a mobile station. It has a constant cell coverage based on radio wave strength and call quality received by the mobile communication terminal.

Therefore, when designing a network, a predetermined area is appropriately arranged and constructed to cover a predetermined area with a plurality of base stations based on such a call radius. However, due to the propagation characteristics, a shaded area where communication is impossible due to a decrease in the strength and quality of radio waves. Many of these will occur.

Repeater (repeater) is a device for solving such a shadow area, is a transmission medium that receives a signal from the base station and transmits it to the mobile communication terminal.

These repeaters can detect forward degradation by comparing the gain with the final output.

However, since the reverse signal of the repeater is not a continuous signal but a burst and irregular signal, it is not easy to detect reverse degradation, and since the reverse signal is thermal noise, a power detector having a very wide frequency range is required.

An object according to an embodiment of the present invention, which was devised to solve the above problems, minimizes reverse deterioration detection time and quickly repairs or replaces deterioration equipment, thereby providing a reversed repeater for providing a good quality mobile communication service. The present invention provides a method and apparatus for detecting degradation.

Another object of the present invention is to provide a method and apparatus for detecting reverse degradation of a repeater capable of detecting reverse degradation while minimizing change in repeater system configuration.

In order to achieve the above object, a reverse degradation detection method of a repeater according to an aspect of the present invention comprises the steps of setting the maximum reverse gain; Measuring a degradation detection level of thermal noise for the reverse maximum gain at a reverse final output stage; Calculating a degradation determination value corresponding to a difference between an initial value of the thermal noise in a preset steady state at the reverse maximum gain and a measured degradation detection level of the thermal noise; And comparing the calculated deterioration determination value with a preset reference value and determining that the deterioration determination value is a deterioration of the repeater if the deterioration determination value is greater than or equal to the reference value.

In accordance with another aspect of the present invention, a method for detecting a reverse degradation of a repeater may include measuring a degradation detection level of the pilot signal at a reverse final output terminal; Calculating a degradation determination value corresponding to a difference between an initial value of a preset steady state of the pilot signal and the measured degradation detection level; And comparing the calculated deterioration determination value with a preset reference value and determining that the deterioration determination value is a deterioration of the repeater if the deterioration determination value is greater than or equal to the reference value.

An apparatus for detecting reverse degradation of a repeater according to an aspect of the present invention includes a setting unit for setting a maximum reverse gain; A measurement unit measuring a degradation detection level of thermal noise with respect to the reverse maximum gain at a reverse final output stage; A calculation unit configured to calculate a degradation determination value corresponding to a difference between an initial value of the thermal noise in a predetermined steady state at the reverse maximum gain and a measured degradation detection level of the thermal noise; And a determination unit comparing the calculated degradation determination value with a preset reference value and determining that the degradation is a degradation of the repeater if the degradation determination value is equal to or greater than the reference value.

In accordance with another aspect of the present invention, an apparatus for detecting a reverse degradation of a repeater includes: a generator configured to generate a pilot signal for detecting degradation; A measurement unit measuring a degradation detection level of the pilot signal at a reverse final output terminal; A calculation unit configured to calculate a degradation determination value corresponding to a difference between the initial value of the preset steady state of the pilot signal and the measured degradation detection level; And a determination unit comparing the calculated degradation determination value with a preset reference value and determining that the degradation is a degradation of the repeater if the degradation determination value is equal to or greater than the reference value.

Other objects and features of the present invention in addition to the above objects will be apparent from the description of the embodiments with reference to the accompanying drawings.

Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, a method and a device for detecting reverse degradation of a repeater according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5.

1 illustrates a repeater system for explaining a reverse degradation detection apparatus of a repeater according to the present invention.

Referring to FIG. 1, the system includes a donor repeater 120 and a remote repeater 130.

When the donor repeater 120 receives an optical signal from an optical repeater (not shown) connected by an optical cable or receives an RF signal from a base station 110 or an RF repeater (not shown), the donor repeater 120 converts the optical signal or the RF signal into a signal suitable for a line. Transmit to the remote repeater 130 through the transmission preference, and converts the reverse signal transmitted from the remote repeater 130 to an optical signal to be transmitted to the optical repeater or an RF signal to be transmitted to the base station 110 or RF repeater, The donor repeater 120 is intended to detect reverse degradation that may occur when the reverse signal transmitted from the remote repeater 130 is transmitted to the optical repeater, the RF repeater, the base station 110, and the like.

In order to detect such reverse degradation, the donor repeater 120 uses a pilot signal. In the reverse degradation detection process, a pilot signal is generated at the reverse input terminal and output, and a pilot generated from the reverse input terminal at the reverse output terminal. After the degradation detection level of the signal is measured, the measured degradation detection level is compared with an initial value, which is a detection level of the pilot signal in a steady state, and when the difference between the initial value and the degradation detection level is greater than or equal to a preset reference value, a donor repeater ( It is determined by the reverse degradation of 120). Here, the generated pilot signal may be a pilot sign file.

That is, the donor repeater 120 may detect backward degradation of the donor repeater 120 by comparing an initial value in a steady state with respect to the pilot signal and a degradation detection level of the pilot signal generated for degradation detection.

Here, in order to accurately determine the reverse degradation detection, if the difference between the initial value and the degradation detection level is greater than or equal to the reference value, the reverse gain of the donor repeater 120 is constantly adjusted upward or downward, and then the process is repeated a predetermined number or more times. It can also be done. For example, if the difference between the initial value and the degradation detection level in the first reverse gain is greater than or equal to the reference value, the reverse gain is adjusted upward from the first gain to the second gain, and the difference in the initial value and degradation detection level is also changed in the second reverse gain. If the reference value is greater than or equal to the reference value, the reverse gain is adjusted upward from the second gain to the third gain, and then a series of processes of comparing the difference between the initial value and the deterioration detection level with the reference value may be repeated to determine the reverse degradation. The number of times may vary depending on the situation.

In addition, the donor repeater 120 calculates and compares the difference between the initial value and the degradation detection level, and then turns off the pilot signal generated at the reverse input terminal.

As described above, the detection of the reverse degradation in the repeater may be performed at a time determined by the mobile service provider, but it is preferable to be performed at the minimum time when there is almost no reverse call.

The configuration of such a donor repeater 120 will be described with reference to FIG. 2.

FIG. 2 is a block diagram of an embodiment of the donor repeater shown in FIG. 1.

Referring to FIG. 2, the donor repeater 120 includes a generator 210, a measurer 220, a calculator 230, and a determiner 240.

The generator 210 generates and outputs a signal for detecting reverse degradation of the donor repeater, that is, a pilot signal.

In this case, the generation unit 210 may be configured by adding a function for generating a pilot signal to the duplexer provided in the reverse input terminal or may be separately configured to be parallel to the output terminal of the duplexer.

The measurement unit 220 measures the degradation detection level of the pilot signal at the reverse output terminal of the donor repeater, and the pilot signal generated by the generation unit 210 includes an amplifier, attenuator, mixer, and the like configured in the reverse path of the donor repeater. The degradation detection level of the pilot signal output through the filter is measured.

In this case, the measuring unit 220 may be a power detector provided in the reverse output terminal.

The calculator 230 calculates a degradation determination value, which is a difference between an initial value, which is a detection level of the pilot signal, which is previously measured in the normal state of the donor repeater, and a degradation detection level measured by the measurement unit 220.

In this case, the base value and the degradation detection level are preferably measured at the same backward gain, and the calculation unit 230 is configured to measure the backward gain when the degradation detection level for the pilot signal is measured by the measurement unit 220. It is desirable to calculate the difference between the measured initial value and the deterioration detection level. Of course, the initial value according to the reverse gain is preferably stored in the donor repeater.

The determination unit 240 compares the deterioration determination value calculated by the calculation unit 230 with a preset reference value for determining reverse deterioration, and determines that the deterioration determination value is greater than or equal to the reference value to determine reverse deterioration of the donor repeater.

Here, the determination unit 240 may determine the reverse deterioration of the donor repeater only when the predetermined number of times or more deterioration determination value is greater than or equal to the reference value, and the reference value compared with the deterioration determination value may be a previously measured and set value.

Since the calculation unit 230 and the determination unit 240 in FIG. 2 may be configured using a controller provided in the donor repeater, reverse calculation may be detected without adding a separate module.

When the reverse degradation of the donor repeater is detected as described above, by replacing the donor repeater or the module or the board of the reverse path, the reverse degradation can be eliminated, thereby providing a good quality mobile communication service to the mobile subscriber.

The remote repeater 130 converts the forward signal received through the transmission line into an RF signal, and then transmits the signal to the mobile communication terminal through the antenna, receives the RF signal transmitted from the mobile communication terminal, and converts the signal into a signal suitable for the line. The converted reverse signal is transmitted to the donor repeater through a transmission line. In the present invention, reverse degradation is detected by using thermal noise input to the reverse input terminal of the remote repeater 130.

In order to detect reverse degradation using thermal noise, the remote repeater 130 sets the reverse gain to the maximum to measure the degradation detection level for thermal noise at the reverse end output stage, and the measured degradation detection level and the normal When the difference between the initial value and the deterioration detection level is greater than or equal to a preset reference value, the initial value, which is a detection level of the thermal noise for the reverse maximum gain, is compared.

Here, the reverse gain of the remote repeater 130 can be set to the maximum by controlling the attenuator or amplifier provided in the reverse path, and it is preferable to set the reverse gain to the maximum by controlling the attenuator.

The thermal noise used for reverse degradation detection is always present, and refers to white noise that is the same in all frequency bands regardless of frequency bands.

Like the donor repeater 120, the remote repeater 130 also determines the reverse degradation when the difference between the initial value for the thermal noise and the degradation detection level is equal to or greater than a predetermined number of times to determine the reverse degradation more accurately. You may. Of course, if the difference between the initial value and the degradation detection level is greater than or equal to the reference value, the remote repeater 130 may determine the reverse degradation again by reactivating the reverse degradation detection function, and may schedule activation and deactivation of the reverse degradation detection function. Repeated repetitions can detect reverse degradation more accurately.

In addition, the remote repeater 130 resets the operating gain which is actually operated by the reverse gain set to the maximum when the difference between the initial value and the deterioration detection level is less than the reference value.

The reverse degradation detection at the remote repeater 130 is preferably performed at the shortest time with almost no backward call, similar to the donor repeater.

The configuration of such a remote repeater 130 will be described with reference to FIG. 3.

FIG. 3 is a block diagram illustrating an embodiment of the remote repeater illustrated in FIG. 1. Referring to FIG. 3, the remote repeater includes a setting unit 310, a measuring unit 320, a calculating unit 330, and a determining unit 440. It includes.

The setting unit 310 sets the maximum reverse gain of the remote repeater when the reverse degradation detection function is activated.

At this time, the setting unit 310 may set the maximum of the reverse gain by adjusting the gain of the attenuator provided in the reverse path of the remote repeater.

The measurement unit 320 measures the degradation detection level of the thermal noise for the reverse maximum gain at the reverse end output terminal of the remote repeater.

That is, the measurement unit 320 measures the power level of the thermal noise output to the final output terminal through the amplifier, attenuator, mixer and filter, the thermal noise input through the reverse input terminal of the remote repeater in the state set to the reverse maximum gain, Measure the deterioration detection level of thermal noise.

In this case, the measuring unit 320 may be a power detector provided at the final output terminal.

The calculator 330 calculates a degradation determination value, which is a difference between an initial value of a pre-measured detection level of thermal noise for the reverse maximum gain and a degradation detection level measured by the measurement unit 320 in a normal state of the remote repeater.

The determination unit 440 compares the deterioration determination value calculated by the calculation unit 330 with a preset reference value and determines that the deterioration determination value is greater than or equal to the reference value as the reverse degradation of the remote repeater.

Of course, as described above, the determination unit 440 may determine the reverse degradation of the remote repeater when the predetermined predetermined time abnormality degradation determination value is equal to or greater than the reference value.

Although not shown, the setting unit 310, the calculation unit 330, and the determination unit 440 illustrated in FIG. 3 may be implemented using a controller provided in the remote repeater, and the activation and deactivation of the reverse degradation detection function may also be performed. Can be implemented.

As such, reverse degradation detection in a remote repeater according to an embodiment of the present invention utilizes thermal noise present in all frequency bands, so that it is not necessary to generate a specific signal to measure reverse degradation, thus adding a special module. no need.

4 is an operation flowchart of a reverse degradation detection method of a repeater according to an embodiment of the present invention, and is an operation flowchart of a reverse degradation detection process in the donor repeater shown in FIG. 1.

Referring to FIG. 4, the reverse degradation detection method of the repeater generates a pilot signal at the reverse input terminal of the repeater (S410).

In this case, the generated pilot signal may be a pilot sign file.

The degradation detection level of the pilot signal generated at the reverse end output terminal of the repeater is measured (S420).

Here, the degradation detection level of the pilot signal measured at the reverse end output terminal is measured at a gain state actually operated in the repeater.

In operation S430, a degradation determination value corresponding to a difference between an initial value, which is a detection level of a previously measured pilot signal, and a degradation detection level measured at a final output terminal when a repeater measured in a gain state that is actually operated is in a normal state is calculated.

As can be seen, the reverse degradation detection method of the repeater according to an embodiment of the present invention, the repeater is operated because the difference between the initial value and the measured degradation detection level at the steady state with respect to the current operating gain of the repeater must be calculated. Initial values for gain should be stored.

When the degradation determination value is calculated, the calculated degradation determination value is compared with a preset reference value to determine reverse degradation. If the degradation determination value is greater than or equal to the reference value, the pilot signal generated at the reverse input terminal is turned off, and it is determined as reverse degradation of the repeater. (S440 to S460).

In this case, when the deterioration determination value is greater than or equal to the reference value, it may be determined as reverse deterioration of the repeater. In other words, if the deterioration determination value is greater than or equal to the reference value, the deterioration value is not determined as the reverse deterioration. If the deterioration determination value is repeated several times, it is determined as the reverse deterioration.

Here, in the case of determining the reverse degradation by repeating the predetermined number of times, it is also possible to determine whether the repeater has the reverse degradation while adjusting the operating gain. That is, by comparing the degradation determination value and the reference value at various levels of reverse gain, the reverse degradation can be more accurately determined.

On the contrary, if the determination result of the step S440 is less than the reference value, it is determined that the reverse direction of the repeater is not deteriorated, and the pilot signal generated at the reverse input terminal is turned off (S470).

FIG. 5 is a flowchart illustrating a reverse degradation detection method of a repeater according to another embodiment of the present invention, and is a flowchart illustrating a reverse degradation detection process in the remote repeater illustrated in FIG. 1.

Referring to FIG. 5, the reverse degradation detection method of the repeater sets the reverse gain to the maximum in order to detect the reverse degradation of the remote repeater (S510).

With the maximum gain set in the reverse gain, the degradation detection level for the thermal noise input in the reverse direction of the repeater is measured at the reverse final output stage (S520).

Here, the measured degradation detection level is a power level for thermal noise, and can be measured by using a power detector provided at the final output terminal.

When the degradation detection level of the thermal noise of the repeater is measured, the degradation determination value corresponding to the difference between the initial value of the thermal noise previously measured and stored in the normal state of the repeater and the measured thermal noise is calculated (S530).

When the degradation determination value is greater than or equal to the reference value, the calculated degradation determination value is compared with the predetermined reference value, and it is determined as reverse degradation of the repeater (S540 and S550).

Of course, when the degradation determination value is greater than or equal to the reference value by comparing the degradation determination value with the reference value, it may be determined as reverse degradation of the repeater.

On the contrary, if the determination result of the step S540 is less than the reference value, the reverse gain set as the maximum gain is reset to the operating gain actually operated (S560).

The reverse degradation detection method and apparatus thereof of the repeater according to the present invention can be modified and applied in various forms within the scope of the technical idea of the present invention and are not limited to the above embodiments. In addition, the embodiments and drawings are merely for the purpose of describing the contents of the invention in detail, not intended to limit the scope of the technical idea of the invention, the present invention described above is common knowledge in the technical field to which the present invention belongs As those skilled in the art can have various substitutions, modifications, and changes without departing from the spirit of the present invention, it is not limited to the embodiments and the accompanying drawings. And should be judged to include equality.

1 illustrates a repeater system for explaining a reverse degradation detection apparatus of a repeater according to the present invention.

FIG. 2 is a block diagram of an embodiment of the donor repeater shown in FIG. 1.

3 is a block diagram of an embodiment of the remote repeater shown in FIG.

4 is a flowchart illustrating a reverse degradation detection method of a repeater according to an embodiment of the present invention.

5 is a flowchart illustrating a reverse degradation detection method of a repeater according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

120: donor repeater

130: remote repeater

210: generator

220,320 measuring unit

230, 330: calculation unit

240, 340: judgment unit

310: setting unit

Claims (7)

In the reverse degradation detection method of the remote repeater, Setting the reverse gain to the maximum; Measuring a power level of the thermal noise for the reverse maximum gain at a reverse final output stage for thermal noise input to a reverse input stage; Degradation determination value corresponding to the difference between the initial value of the first power level of the thermal noise and the measured power level of the thermal noise at the reverse final output stage for the reverse maximum gain previously measured in the initial steady state of the remote repeater Calculating; And Comparing the calculated deterioration determination value with a predetermined reference value and determining that the deterioration determination value is deterioration of the remote repeater if the deterioration determination value is greater than or equal to the reference value. Reverse degradation detection method of the repeater comprising a. The method of claim 1, The reverse degradation detection method of the repeater Resetting the reverse gain to a preset operating gain if the degradation determination value is less than the reference value. Reverse degradation detection method of the repeater further comprising. The method of claim 1, Determining the deterioration of the repeater is And detecting the degradation of the repeater when the degradation determination value is equal to or greater than the reference value. In the reverse degradation detection method of the donor repeater, Generating a pilot signal for detecting degradation at a reverse input; Measuring a power level for the pilot signal at a reverse final output; Calculating a deterioration determination value corresponding to a difference between an initial value, which is a first power level of the pilot signal at the reverse end output stage, and a measured power level in the initial normal state of the donor repeater; And Comparing the calculated degradation determination value with a predetermined reference value and determining that the donor repeater is deteriorated when the degradation determination value is greater than or equal to the reference value. Reverse degradation detection method of the repeater comprising a. The method of claim 4, wherein The pilot signal is Reverse degradation detection method of pilot sine pine repeater. In the reverse degradation detection device of the remote repeater, A setting unit for setting a maximum backward gain; A measurement unit measuring a power level of the thermal noise for the reverse maximum gain at a reverse final output stage with respect to thermal noise input to a reverse input terminal; Degradation determination value corresponding to the difference between the initial value of the first power level of the thermal noise and the measured power level of the thermal noise at the reverse final output stage for the reverse maximum gain previously measured in the initial steady state of the remote repeater A calculation unit for calculating; And A determination unit comparing the calculated degradation determination value with a preset reference value and determining that the degradation is the degradation of the remote repeater if the degradation determination value is greater than or equal to the reference value; Reverse degradation detection device of a repeater comprising a. In the reverse degradation detection device of the donor repeater, A generator configured to generate a pilot signal for detecting degradation in a reverse input terminal; A measuring unit measuring a power level of the pilot signal at a reverse final output terminal; A calculator configured to calculate a degradation determination value corresponding to a difference between an initial value of a first power level of the pilot signal and a measured power level of the pilot signal at the reverse end output stage measured in the initial normal state of the donor repeater; ; And A determination unit comparing the calculated deterioration determination value with a predetermined reference value and determining the deterioration of the donor repeater if the deterioration determination value is greater than or equal to the reference value; Reverse degradation detection device of a repeater comprising a.

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