KR20180051350A - Apparatus and method for monitoring status of terminal - Google Patents

Abstract

Provided is a device for monitoring the status of a terminal, which is connected to the terminal of an optical subscriber′s side in an optical network. A signal transmission part transmits a downstream optical signal to the terminal, and receives the reflected optical signal, which is the downstream optical signal inputted after being reflected from the terminal. A signal receiving part measures the intensity of the reflected optical signal. A signal processing part compares the intensity of the downstream optical signal with the intensity of the reflected optical signal to determine the connection state of the terminal. A signal output part outputs the connection state.

Description

[0001] APPARATUS AND METHOD FOR MONITORING STATUS OF TERMINAL [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a method and apparatus for detecting an end state, and more particularly, to a method and apparatus for detecting an end state of an optical network.

Recently, due to explosive increase of mobile data traffic, attempts have been actively made to broaden, broaden, and integrate wired and wireless networks. In wired optical networks, gigabit Ethernet passive optical network (E-PON) and gigabit passive optical network (G-PON) technologies are becoming popular.

The optical communication service provider dispatches the operator to the optical subscriber-side distribution when the new subscriber of the optical communication commencement of the service or the report of the fault occurs. The optical line side distribution box is connected to an optical line from an optical line terminal (OLT) and a plurality of optical lines to be distributed to each home. It is difficult to accurately understand the optical line connection information of the optical network at the branching point, and thus it is difficult for the operator to carry out the work. At the actual site, there may be optical lines that are not used because of the optical line of the subscriber terminal due to the change of the service provider of the subscriber or the moving of the subscriber, but the optical line is classified into the optical subscriber distribution box.

Measurement instruments used to check the current terminal status include optical power meter and optical time domain reflectometer (OTDR). The optical power meter is used to numerically measure the loss of the entire optical path. The optical power meter can not only determine the current state of the port but can only determine the intensity of the optical signal received at the measuring point. OTDR is a measuring instrument that calculates the backward scattering due to the Rayleigh scattering in the optical line and the reflection light generated at the connection point and the breaking point by introducing the optical pulse into the optical line, to be. Although OTDR can accurately determine the optical line condition, it is inefficient to supply OTDR, which is an expensive measuring instrument, to all the field workers who can work sufficiently with simple status information.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an end-state detection method and apparatus capable of accurately grasping an end-state.

According to an embodiment of the present invention, there is provided an end-state sensing apparatus connected to an end of an optical network side in an optical network. The termination state sensing apparatus includes a signal transmission unit, a signal reception unit, a signal processing unit, and a signal output unit. The signal transmission unit transmits a downstream optical signal to the terminating end and receives the reflected optical signal to which the downstream optical signal is reflected from the terminating end, and the signal receiving unit measures the intensity of the reflected optical signal. The signal processor compares the intensity of the downstream optical signal with the intensity of the reflected optical signal to determine a connection state of the terminal apparatus at the terminal, and the signal output unit outputs the connection state.

The signal processing unit may take into account the type of the optical connector used to connect the end equipment when determining the connection state.

Wherein the signal receiving unit determines that the terminal apparatus is connected to the terminal when the loss of the reflected optical signal with respect to the downlink optical signal falls within the first range, If the loss of the signal falls within a second range different from the first range, it can be determined that the terminal is not connected to the terminal.

The signal receiving unit may determine that the terminal apparatus is connected to the terminating end and the third state in which the terminating apparatus is powered on when the intensity of the reflected optical signal is equal to or higher than a predetermined strength. At this time, the first state may be a state in which the terminal device is connected to the terminal device and the power of the terminal device is turned off.

If the optical connector used to connect the terminating device is a PC (physical contact) type, the intensity of the first range may be less than the intensity of the second range.

If the optical connector used to connect the terminating device is of the angled physical contact (APC) type, the intensity of the first range may be greater than the intensity of the second range.

The downlink optical signal may be a downlink optical signal transmitted from an optical line from an OLT of the optical network.

In this case, the signal receiving unit may include a first photoelectric conversion element for measuring the intensity of the downstream optical signal and a second photoelectric conversion element for measuring the intensity of the reflected optical signal.

The signal transmission unit may include a coupler that distributes the downstream optical signal and transmits the downstream optical signal to the terminal and the signal receiving unit and transmits the reflected optical signal from the terminal to the signal receiving unit.

The termination state sensing apparatus may further include a light source for generating the downlink optical signal.

In this case, the signal receiving unit may include a photoelectric conversion element for measuring the intensity of the reflected optical signal.

The signal transmission unit may include a splitter that transmits the downstream optical signal generated by the optical source to the terminating end and transmits the reflected optical signal from the terminating end to the signal receiving unit.

The light source may comprise a laser diode.

The termination state detection apparatus includes an optical power meter unit for measuring an intensity of a downstream optical signal from the OLT of the optical network and an intensity of an upstream optical signal from the end apparatus, and a high- Unit. ≪ / RTI >

According to another embodiment of the present invention, there is provided a method for detecting an end state of an end state sensing apparatus connected to an end of an optical network side in an optical network. The end-state detection method includes the steps of distributing a downstream optical signal from an OLT of the optical network and delivering the downstream optical signal to the inside of the termination state sensing apparatus, measuring intensity of a downstream optical signal transmitted to the inside, Measuring the intensity of the reflected optical signal, comparing the intensity of the downstream optical signal with the intensity of the reflected optical signal, and measuring the intensity of the reflected optical signal at the terminal Judging a connection state of the terminating device of the mobile communication terminal, and outputting the connection state.

The step of determining the connection state may include considering the type of the optical connector to be used for connection of the end device in consideration of the connection state.

Wherein the step of determining the connection state comprises the steps of: when a loss of the reflected optical signal with respect to the downlink optical signal falls within a first range determined by the type of the optical connector, If the loss of the reflected optical signal with respect to the downlink optical signal falls within a second range different from the first range determined by the type of the optical connector, 2 < / RTI > state.

According to another embodiment of the present invention, there is provided a method for detecting an end state of an end state sensing apparatus connected to an end of an optical network side in an optical network. The termination state sensing method includes the steps of generating an optical signal, transferring the optical signal to the terminator, receiving a reflected optical signal to which the downstream optical signal is reflected at the terminating end, Comparing the intensity of the optical signal with the intensity of the reflected optical signal to determine a connection state of the terminal apparatus at the terminal, and outputting the connection state.

The step of determining the connection state may include considering the type of the optical connector to be used for connection of the end device in consideration of the connection state.

Wherein the step of determining the connection state comprises the steps of: when a loss of the reflected optical signal with respect to the downlink optical signal falls within a first range determined by the type of the optical connector, If the loss of the reflected optical signal with respect to the downlink optical signal falls within a second range different from the first range determined by the type of the optical connector, 2 < / RTI > state.

According to an embodiment of the present invention, it is possible to easily detect the state of the end device at the end of the optical network.

1 is a schematic block diagram of an apparatus for detecting an end state in an optical network according to an embodiment of the present invention.
2 is a diagram showing an example of the terminal state sensing apparatus shown in FIG.
3 is a schematic block diagram of an apparatus for detecting an end state in an optical network according to another embodiment of the present invention.
4 is a diagram showing an example of the terminal state sensing apparatus shown in FIG.
5 is a schematic flowchart of a method for detecting an end state according to an embodiment of the present invention.
Figures 6, 7 and 8 are schematic block diagrams of an end-state sensing device according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

The expressions described in the singular may be interpreted as singular or plural unless an explicit expression such as "a" or "a" is used.

FIG. 1 is a schematic block diagram of an apparatus for detecting an end state in an optical network according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating an example of the apparatus for detecting an end state shown in FIG.

In some embodiments, the termination status sensing device 100 is coupled to termination 20 on the optical subscriber side to sense the connection status of an end device, e.g., an optical network terminal (ONT). For example, the termination status sensing device 100 may be installed in a distribution box on the optical subscriber side. In one embodiment, the termination state sensing apparatus 100 can be used by an operator in a portable manner.

1, the termination state sensing apparatus 100 includes a signal transmission unit 110, a signal reception unit 120, a signal conversion unit 130, a signal processing unit 140, and a signal output unit 150.

The signal transmission unit 110 may be connected to the optical line from the optical line terminal (OLT) 10 and the termination 20 on the optical subscriber side. For this, the signal transmission unit 110 may have an input terminal connected to the optical line from the OLT 10 and an input terminal connected to the terminal 20. The signal transmission unit 110 distributes the downlink optical signal input from the OLT 10 and transmits the downstream optical signal to the terminal 20 and the signal reception unit 120. The optical signal distributed to the terminal 20 is reflected at the terminal 20 and input to the terminal state sensing apparatus 100. The signal transmission unit 110 receives the optical signal reflected from the terminal 20 and inputted, 130). In some embodiments, as shown in FIG. 2, signal transmitter 110 may include a coupler, for example, a 2: 2 coupler.

The signal receiving unit 120 receives the optical signal transmitted from the signal transmitting unit 110 and measures the intensity of the received optical signal. In some embodiments, the signal receiving unit 120 may include a plurality of photoelectric conversion elements, and each photoelectric conversion element may be a photodiode. In one embodiment, as shown in FIG. 2, the signal receiving unit 120 may include two photodiodes 121 and 122. In this case, the signal transmission unit 110 may distribute the optical signal input from the OLT 10 to the photodiode 122, and may transmit the optical signal reflected from the termination 20 to the photodiode 121. The photodiode 121 measures the intensity of the optical signal reflected from the terminal 20 and the photodiode 122 measures the intensity of the optical signal input to the OLT 10. [

The signal converting unit 130 converts the intensity of the optical signal measured by the signal receiving unit 120 into a digital signal. In some embodiments, as shown in FIG. 2, the signal converting unit 130 may include an analog-to-digital converter (ADC) for converting the intensity of the optical signal into a digital signal. In one embodiment, the signal converting unit 130 may convert the intensity of the optical signals measured by the two photodiodes 121 and 122 into digital signals. In another embodiment, if the intensity of the optical signal output from the signal receiving unit 120 is a digital signal, the signal converting unit 130 may be omitted.

The signal processor 140 detects the ONT connection state at the terminal 20 based on the intensity of the optical signal converted into the digital signal by the signal converter 130. In some embodiments, the signal processing unit 140 compares the intensity of the optical signal input at the OLT 10 with the intensity of the optical signal reflected at the terminal 20, and based on the comparison result, It is possible to detect whether or not the connection is normally established. The signal output unit 150 outputs the connection state sensed by the signal processing unit 140. In some embodiments, the signal processing unit 140 may be implemented as a processor, such as a micro controller unit (MCU). In some embodiments, the signal output unit 150 may be implemented as a display device such as a liquid crystal display (LCD), a light emitting diode, an organic light emitting diode (OLED) have.

Therefore, the termination state sensing apparatus 100 compares the intensity of the downstream optical signal received from the OLT 10 with the intensity of the optical signal reflected at the terminating end without using a separate light source, The connection status can be detected. Also, since the termination state sensing apparatus 100 transmits a downstream optical signal from the OLT 10 to the termination 20, the ONT at the termination 20 during termination status sensing can provide the Internet service without interruption.

FIG. 3 is a schematic block diagram of an apparatus for detecting an end state in an optical network according to another embodiment of the present invention, and FIG. 4 is a diagram illustrating an example of the apparatus for detecting an end state shown in FIG.

Referring to FIG. 3, the termination state sensing apparatus 300 may use a separate light source. To this end, the termination state sensing apparatus 300 includes a signal transmission unit 310, a signal reception unit 320, a signal conversion unit 330, a signal processing unit 340, a signal output unit 350, and a light source 360 do.

The light source 360 generates an optical signal for sensing the connection state of the ONT at the terminal 20 on the optical subscriber side and transmits the optical signal to the signal transmission unit 310. In some embodiments, as shown in FIG. 4, the light source 360 may include a laser diode.

The signal transmission unit 310 may be connected to the terminal 20 on the optical subscriber side. For this purpose, the signal transmitter 310 may have an input terminal connected to the terminal 20. The signal transmitter 310 transmits the optical signal generated by the light source 360 to the terminal 20. The optical signal transmitted to the terminal 20 is reflected by the terminal 20 and input to the terminal state sensing device 300. The signal transmitter 310 receives the optical signal reflected from the terminal 20 and inputted thereto, 330). In some embodiments, as shown in FIG. 4, the signal transmitter 310 may include a splitter, for example, a 1: 2 splitter.

The signal receiving unit 320 receives the optical signal transmitted from the signal transmitting unit 310 and measures the intensity of the received optical signal. In some embodiments, the signal receiver 320 may include a photoelectric conversion device, e.g., a photodiode, for measuring the intensity of the optical signal reflected at the termination 20. [

The signal converting unit 330 converts the intensity of the optical signal measured by the signal receiving unit 320 into a digital signal. In some embodiments, as shown in FIG. 4, the signal converting unit 430 may include an ADC for converting the intensity of the optical signal into a digital signal. In one embodiment, the signal converting unit 330 may convert the intensity of the optical signal measured by the photodiode 320 into a digital signal. In another embodiment, if the intensity of the optical signal output from the signal receiving unit 320 is a digital signal, the signal converting unit 330 may be omitted.

The signal processor 340 detects the connection state of the ONT at the terminal 20 based on the intensity of the optical signal converted into the digital signal by the signal converter 330. In some embodiments, the signal processing unit 340 compares the intensity of the optical signal generated at the known light source 360 with the intensity of the optical signal reflected at the terminal 20, and based on the comparison result, It is possible to detect whether or not the ONT is normally connected. The signal output unit 350 outputs the connection state sensed by the signal processing unit 340. [

Therefore, the termination state sensing apparatus 300 can detect the connection state of the termination device at the end of the optical subscriber side by using a separate light source without connecting to the optical line from the OLT 10. Also, since the termination state sensing apparatus 100 senses the connection state with the optical signal generated from the separate light source, the ONT at the termination 20 during the termination state sensing can provide the Internet service without interruption.

Next, a method of detecting the terminal state in the terminal state sensing apparatus according to an embodiment of the present invention will be described with reference to FIG.

5 is a schematic flowchart of a method for detecting an end state according to an embodiment of the present invention.

Referring to FIG. 5, the end-state sensing apparatus transmits the downstream optical signal to the terminal (S510). In one embodiment, the downstream optical signal may be a signal obtained by distributing the optical signal input from the OLT. In another embodiment, the downstream optical signal may be an optical signal generated in the light source. The termination state sensing apparatus receives the optical signal reflected from the termination (S520), and measures the intensity of the reflected optical signal (S530).

The termination state detection apparatus compares the intensity of the reflected optical signal with the intensity of the downstream optical signal (S540). In one embodiment, the termination state sensing device can measure the intensity of an optical signal input from the OLT to the interior of the termination state sensing device. In another embodiment, the termination state sensing device may know in advance the intensity of the optical signal generated in the light source.

The terminal state detection apparatus determines the connection state of the ONT at the terminal based on the comparison result (S550), and outputs the determined connection state (S560). On the other hand, depending on the type of the optical connector used for the optical line connected to the ONT at the terminal end, the strength of the optical signal reflected may vary. In certain embodiments, the termination state sensing device may take into account the type of optical connector when determining the connection state.

In some embodiments, the optical connector type may be either a PC (physical contact) type or an APC (angled physical contact) type. In the case of a PC type optical connector, if the loss when the optical signal is reflected when the optical connector is connected to the ONT (that is, when the contact surface of the interface is optical fiber) is not connected to the ONT That is, when the contact surface of the interface is air). In the case of the APC type optical connector, the loss when the optical signal is reflected when the optical connector is not connected to the ONT is smaller than the loss when the optical signal is reflected when the optical connector is connected to the ONT. Referring to Table 1, for example, when a PC type or APC type optical connector is connected to the ONT, the loss of the optical signal reflected to the [PC (fiber) or APC (fiber)] is -40 dB, When the PC type optical connector is not connected to the ONT, the loss of the optical signal reflected by [PC (air)] is -20dB. If the APC type optical connector is not connected to the ONT [APC )] May be -60 dB.

Connector type (interface state) Loss [dB] PC (fiber) -40 PC (air) -20 APC (fiber) -40 APC (air) -60

Therefore, when a PC type optical connector is used, the termination state detecting device compares the strength of the downstream signal with the intensity of the reflected optical signal, and when the loss of about -40 dB is generated in the reflected optical signal, And it can be determined that the ONT is not connected to the terminal when a loss of about -20 dB occurs in the reflected optical signal. When an APC type optical connector is used, the termination state detecting apparatus compares the intensity of the downstream optical signal with the intensity of the reflected optical signal, and when the loss of about -40 dB is caused in the reflected optical signal, And it can be determined that the ONT is not connected to the terminal when a loss of about -60 dB is generated in the reflected optical signal. In some embodiments, the type of optical connector may be input by the user to the termination condition sensing device.

In some embodiments, the intensity of the reflected optical signal can vary depending on the state of the contact surface, so that the termination state sensing device is able to detect the intensity of the reflected light signal between the upper limit value that is greater than the ideal intensity (e.g., A predetermined range can be used for the determination of loss. That is, the terminal state sensing apparatus can determine the connection state of the ONT according to the range in which the loss occurring in the reflected optical signal is included.

In some embodiments, the termination state sensing device can distinguish ONT connection states into three states. That is, the termination state detecting apparatus judges that the connection state of the ONT is either a state in which the ONT is connected while the ONT is connected, a state in which the ONT is connected to the termination but a state in which the power is OFF and a state in which the ONT is not connected to the termination can do. When the ONT is connected and the power is turned on, since the upstream optical signal is input from the ONT to the optical line, the intensity of the optical signal received by the terminal state sensing device is stronger than a predetermined magnitude. For example, when measuring the intensity of an optical signal from the subscriber-side distribution box to the terminal state sensing device, the distance from the ONT to the subscriber-side distribution box is generally 200 m or less, so that the intensity of the optical signal may be -10 dBm or more.

Therefore, when the intensity of the received optical signal is equal to or greater than a predetermined magnitude (for example, -10 dBm), the terminal state sensing apparatus can determine that the power is turned on while the ONT is connected to the terminal. If the intensity of the received optical signal is smaller than a predetermined magnitude (for example, -10 dBm) and the loss of the reflected optical signal falls within the first range, the termination state sensing apparatus may be configured such that the ONT is connected to the terminating terminal, State. Alternatively, if the intensity of the received optical signal is smaller than a predetermined level (for example, -10 dBm) and the loss of the reflected optical signal falls within the second range, . For example, for a PC type, the intensity of the first range may be less than the intensity of the second range, and for the APC type, the intensity of the first range may be greater than the intensity of the second range.

Meanwhile, the termination state sensing apparatus according to an embodiment of the present invention can be combined with an optical power meter for measuring the power of an optical signal. Hereinafter, such an embodiment will be described with reference to FIGS. 6 to 8 .

Figures 6, 7 and 8 are schematic block diagrams of an end-state sensing device according to another embodiment of the present invention.

6, the termination state sensing apparatus 600 includes a signal transmission unit 610, an upstream signal reception unit 620, a downstream signal reception unit 630, and a downstream signal distribution unit 640 in order to perform an optical power meter function. .

The signal transmission unit 610 may be connected to the optical line from the OLT 10 and the termination 20 on the optical subscriber side. The signal transmission unit 610 may have an input terminal 611 connected to the optical line from the OLT 10 and an input terminal 612 connected to the terminal 20. [ The signal transmission unit 610 distributes the downlink optical signal input from the OLT 10 and transmits the downstream optical signal to the terminal 20 and the downstream signal reception unit 630 and distributes the upstream optical signal input from the ONT connected to the terminal 20 And transmits it to the OLT 10 and the upstream signal receiving unit 620. In some embodiments, signal transmitter 610 may include a coupler, for example a 2: 2 coupler. This coupler 610 may use a 9: 1 ratio to minimize the loss of downlink optical signals transmitted from the OLT 10 to the termination 20 and upstream optical signals transmitted from the termination 20 to the OLT 10 have.

The uplink signal receiving unit 620 receives the uplink optical signal transmitted from the signal transmitting unit 610 and measures the strength of the received uplink optical signal. In some embodiments, the upstream signal receiving unit 120 may include a photoelectric conversion element UPD for measuring the intensity of the received upstream optical signal, and the photoelectric conversion element may be a photodiode. In some embodiments, the termination state sensing device 600 may further include a band pass filter 621 for filtering a wavelength band (e.g., 1310 nm) used in the upstream optical signal, The signal receiving unit 620 can measure the intensity of the upstream optical signal filtered by the band pass filter 621.

The downlink signal distributor 640 distributes the downlink optical signal transmitted from the signal transmitter 610 to a plurality of paths. In some embodiments, the downlink signal distributor 640 may include a 1: 2 splitter to distribute the downlink optical signal to the two paths.

The downlink signal receiver 630 receives the downlink optical signals distributed to the plurality of paths in the downlink signal distributor 640, and measures the intensity of the downlink signals. In some embodiments, the downstream signal receiving unit may include a plurality of photoelectric converters DPD1 and DPD2 corresponding to a plurality of paths, respectively, and each photoelectric converter may be a photodiode. In some embodiments, the termination state sensing apparatus 600 may further include a band-pass filter 631 for filtering a predetermined wavelength band (for example, 1490 nm) of the wavelength band used in the downstream optical signal. In this case, the photoelectric conversion element DPD2 converts the intensity of the downstream optical signal (for example, a downstream optical signal in the 1490 nm band) filtered by the band-pass filter 631 out of the downstream optical signals distributed in the downstream signal distributor 640 Can be measured. The other photoelectric conversion element DPD1 can measure the intensity of another downstream optical signal distributed in the downstream signal distributor 640. [

Accordingly, the termination state sensing apparatus 600 can perform the function of the optical power meter by measuring the intensity (i.e., power) of the upstream optical signal and the downstream optical signal.

The terminal state detection apparatus 600 further includes an uplink signal distribution unit 650 and a reflection signal reception unit 660 to perform an end state detection function.

The reflection signal receiving unit 660 may include a photoelectric conversion element RPD for reflection signal measurement. The upstream signal distributor 650 distributes the upstream optical signal transmitted from the signal transmitter 610 to a plurality of paths. In this case, the upstream optical signal distributed to one of the plurality of paths passes through the band-pass filter 621 and is transferred to the photoelectric conversion element UPD, and the photoelectric conversion element UPD is connected to the ONT It is possible to measure the intensity of the upstream optical signal. In some embodiments, the termination state sensing apparatus 600 further comprises a filter 622 for filtering the wavelength band of the reflected optical signal, i.e., the wavelength band of the downstream optical signal, It is possible to filter the optical signals distributed to different paths. In one embodiment, since the downstream optical signal uses a longer wavelength band than the upstream optical signal, the filter 622 may be a low pass filter. For example, the filter 622 can pass only a wavelength band of 1410 nm or more. Therefore, the photoelectric conversion element RPD can measure the intensity of the optical signal, that is, the reflected optical signal, distributed to the other path in the upstream signal distributor 650.

Accordingly, the termination state sensing apparatus 600 can detect the connection state of the terminal 20 by comparing the intensity of the downstream optical signal with the intensity of the reflected optical signal, thereby performing the connection state sensing function.

In some embodiments, the termination state sensing apparatus 600 includes the signal conversion unit 130 or 330, the signal processing unit 140 or 340 (hereinafter, referred to as " And a signal output unit 150 or 350. [0034]

In some embodiments, the endpoint state sensing device 600 may further include a visual fault locator (VFL) unit. The high-strength detector unit includes a laser diode (not shown), which detects the advantages at the end.

Referring to FIG. 7, the optical power meter function and the terminal state sensing function can be separated from each other in the terminal state sensing apparatus 700. 6, the termination state sensing apparatus 700 includes a signal transmission unit 610, an upstream signal reception unit 620, a downstream signal reception unit 630, and a downstream signal distribution unit 630, (640).

7, the termination state sensing apparatus 700 further includes a signal distributor 750, a light source 760, and a reflection signal receiver 770 to perform the termination state sensing function.

The light source 760 generates an optical signal for detecting the connection state of the ONT in the terminal 20 on the optical subscriber side and transmits the optical signal to the signal distributor 750. In some embodiments, the light source 760 may include a laser diode LDl.

The signal distributor 750 transmits the optical signal generated by the light source 760 to the terminal 20 through the optical line. To this end, the signal distribution unit 750 may have an input terminal 751 connected to the termination 20. [ The optical signal transmitted to the terminal 20 is reflected at the terminal 20 and input to the terminal state sensing device 700. The signal distributor 750 receives the optical signal reflected from the terminal 20, (770). In some embodiments, the signal distribution unit 750 may include a splitter, for example, a 1: 2 splitter.

The signal receiving unit 770 receives the reflected optical signal transmitted from the signal distributor 750 and measures the intensity of the reflected optical signal. In some embodiments, the signal receiving unit 770 may include a photoelectric conversion element (RPD) for measuring the intensity of the reflected optical signal, and the photoelectric conversion element may be a photodiode.

In some embodiments, the termination state sensing apparatus 700 may include the signal conversion unit 130 or 330, the signal processing unit 140 or 340 And a signal output unit 150 or 350. [0034]

In some embodiments, the endpoint state sensing device 700 may further include a laser diode (not shown) to further perform the function of a visual fault locator (VFL).

Referring to FIG. 8, it is possible to separate the optical power meter function and the terminal state detection function from the terminal state detection apparatus 800, and combine the terminal state detection function and the high-strength detection function.

6, the termination state sensing apparatus 700 includes a signal transmission unit 610, an upstream signal reception unit 620, a downstream signal reception unit 630, and a downstream signal distribution unit 630, (640). 7, the termination state sensing apparatus 700 further includes a signal distributor 750, a light source 760, and a reflection signal receiver 770 to perform the termination state sensing function.

Referring again to FIG. 8, the termination state sensing apparatus 800 further includes a signal distributor 880 and a light source 890.

The light source 880 generates an optical signal for high-strength detection and transmits the optical signal to the signal distributor 880. In some embodiments, the light source 880 may include a laser diode LD2.

The signal distributor 890 transfers the optical signal transmitted from the light source 880 to the signal distributor 750. The signal distributor 750 transmits the received optical signal to the optical line to use for the detection of the high strength . The signal distributor 890 transmits the optical signal generated by the light source 750 to the signal distributor 750. In some embodiments, the signal distribution section 890 may comprise a splitter, for example a 1: 2 splitter.

According to the embodiment described with reference to FIGS. 6 to 8, since various functions can be implemented by one device, an operator working in the field can perform various functions by carrying only one device without having to carry various devices .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (20)

An end-state sensing device coupled to an end of an optical subscriber's side in an optical network,
A signal transmission unit for transmitting a downstream optical signal to the termination and receiving a reflected optical signal to which the downstream optical signal is reflected from the termination,
A signal receiver for measuring the intensity of the reflected optical signal,
A signal processing unit for comparing the intensity of the downstream optical signal with the intensity of the reflected optical signal to determine a connection state of the terminal apparatus at the terminal,
And a signal output unit
And an end-state detection unit. The method of claim 1,
And the signal processing unit considers the type of optical connector used for connection of the end apparatus when determining the connection state. The method of claim 1,
Wherein the signal receiving unit determines that the terminal apparatus is connected to the terminal when the loss of the reflected optical signal with respect to the downlink optical signal falls within the first range, And determines that the terminal is in a second state in which the terminal is not connected to the terminal if the signal loss falls within a second range different from the first range. 4. The method of claim 3,
Wherein the signal receiving unit determines that the terminal apparatus is connected to the terminating end and the third state in which the power of the terminating apparatus is turned on when the intensity of the reflected optical signal is equal to or higher than a predetermined strength,
Wherein the first state is a state in which the terminal device is connected to the terminal device and the power of the terminal device is turned off
Termination status sensing device. 4. The method of claim 3,
Wherein when the optical connector used for connecting the end device is a PC (physical contact) type, the intensity of the first range is smaller than the intensity of the second range. 4. The method of claim 3,
Wherein the intensity of the first range is greater than the intensity of the second range when the optical connector used to connect the terminal is an angled physical contact (APC) type. The method of claim 1,
Wherein the downstream optical signal is a downstream optical signal transmitted from an optical line from an optical line terminal (OLT) of the optical network. 8. The method of claim 7,
Wherein the signal receiving unit includes a first photoelectric conversion element for measuring the intensity of the downstream optical signal and a second photoelectric conversion element for measuring the intensity of the reflected optical signal. 8. The method of claim 7,
Wherein the signal transmission unit includes a coupler that distributes the downstream optical signal and transmits the downstream optical signal to the terminal and the signal receiving unit and transmits the reflected optical signal from the terminal to the signal receiving unit. The method of claim 1,
And a light source for generating the downstream optical signal. 11. The method of claim 10,
Wherein the signal receiving unit includes a photoelectric conversion element for measuring the intensity of the reflected optical signal. 11. The method of claim 10,
Wherein the signal transmission unit includes a splitter that transmits the downstream optical signal generated by the light source to the terminating end and transmits the reflected optical signal from the terminating end to the signal receiving unit. 11. The method of claim 10,
Wherein the light source comprises a laser diode. The method of claim 1,
Further comprising at least one of an optical power meter unit for measuring the intensity of the downstream optical signal from the OLT of the optical network and the intensity of the upstream optical signal from the end apparatus and a high-strength detector unit for detecting the high- To-end state sensing device. CLAIMS 1. A method for detecting an end state of an endpoint state sensing apparatus connected to an end of an optical network side in an optical network,
Distributing a downstream optical signal from an OLT of the optical network and transmitting the downstream optical signal to the inside of the termination state sensing apparatus,
Measuring the intensity of the downstream optical signal transmitted to the inside,
Receiving a reflected optical signal in which the downstream optical signal is reflected and input at the terminating end,
Measuring the intensity of the reflected optical signal,
Comparing the intensity of the downstream optical signal with the intensity of the reflected optical signal to determine a connection state of the terminal device at the terminal;
Outputting the connection status
/ RTI > 16. The method of claim 15,
Wherein the step of determining the connection state includes considering the type of optical connector to be used for connection of the end device when considering the connection state. 17. The method of claim 16,
Wherein the step of determining the connection state comprises the steps of: when the loss of the reflected optical signal to the downlink optical signal falls within a first range determined by the type of the optical connector, If the loss of the reflected optical signal with respect to the downlink optical signal falls within a second range different from the first range determined by the type of the optical connector, 2 < / RTI > state. CLAIMS 1. A method for detecting an end state of an endpoint state sensing apparatus connected to an end of an optical network side in an optical network,
Generating an optical signal,
Transferring the optical signal to the termination,
Receiving a reflected optical signal in which the downstream optical signal is reflected and input at the terminating end,
Measuring the intensity of the reflected optical signal,
Comparing the intensity of the optical signal with the intensity of the reflected optical signal to determine a connection state of the terminal apparatus at the terminal, and
Outputting the connection status
/ RTI > The method of claim 18,
Wherein the step of determining the connection state includes considering the type of optical connector to be used for connection of the end device when considering the connection state. 20. The method of claim 19,
Wherein the step of determining the connection state comprises the steps of: when a loss of the reflected optical signal with respect to the downlink optical signal falls within a first range determined by the type of the optical connector, If the loss of the reflected optical signal with respect to the downlink optical signal falls within a second range different from the first range determined by the type of the optical connector, 2 < / RTI > state.

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