WO2017086742A1 - 파장 설정용 보조 장치 및 광 네트워크 장치의 광 파장 설정 방법 - Google Patents
파장 설정용 보조 장치 및 광 네트워크 장치의 광 파장 설정 방법 Download PDFInfo
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- WO2017086742A1 WO2017086742A1 PCT/KR2016/013350 KR2016013350W WO2017086742A1 WO 2017086742 A1 WO2017086742 A1 WO 2017086742A1 KR 2016013350 W KR2016013350 W KR 2016013350W WO 2017086742 A1 WO2017086742 A1 WO 2017086742A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07957—Monitoring or measuring wavelength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0272—Transmission of OAMP information
- H04J14/0275—Transmission of OAMP information using an optical service channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0287—Protection in WDM systems
- H04J14/0293—Optical channel protection
Definitions
- the technical idea of the present invention relates to an optical wavelength setting method of an auxiliary device for wavelength setting and an optical network device, and more particularly, to a passive optical network based on wavelength division multiplexing (WDM).
- the present invention relates to a wavelength setting auxiliary device for setting an appropriate optical wavelength of an optical signal, and an optical wavelength setting method of an optical network device.
- Wavelength Division Multiplexing-Passive Optical Network (WDM-PON) has attracted attention as one of the methods for improving subscriber network transmission capacity.
- wavelength division passive optical network signals of various wavelengths are simultaneously transmitted and received, so that when a wavelength of a specific channel deviates from a predetermined wavelength position due to an external factor such as a change in external air temperature, communication is interrupted or other channels are lost. Interference with wavelengths causes severe communication quality degradation.
- WDM-PON wavelength division multiplexing passive optical network
- the problem to be solved by the wavelength setting auxiliary apparatus and the optical wavelength setting method of the optical network device according to the technical idea of the present invention is to enable a simple and effective control of the wavelength of the optical signal output from the optical network device.
- the technical problem to be solved by the wavelength setting auxiliary apparatus and the optical wavelength setting method of the optical network device according to the technical idea of the present invention is not limited to the above-mentioned problem, another problem that is not mentioned is those skilled in the art from the following description Will be clearly understood.
- a wavelength setting auxiliary device transmits a test signal having a first wavelength to an optical line terminal and senses the power of a return signal with respect to the test signal.
- An optical wavelength analyzer configured to set optical wavelength information of a tunable optical module by executing a center wavelength sensing algorithm based on a result;
- a connection unit connected to the tunable optical module for interfacing data transmitted between the optical wavelength analyzer and the tunable optical module.
- the optical wavelength analyzer may include: a reception signal detector configured to detect a reception signal from the optical line termination device; A received signal analyzer for detecting a wavelength and power of the received signal and transmitting the optical wavelength information to the connection unit; And an optical wavelength variable transmitter transmitting the test signal.
- the optical wavelength analyzer may extract the wavelength information of the line management signal by analyzing the line management signal received from the optical line termination device.
- the optical wavelength analyzer selects the first wavelength based on wavelength information of the line management signal to transmit the test signal, and a result of sensing power of the reply signal satisfies a predetermined condition. Can be determined.
- the optical wavelength analyzer executes the center wavelength detection algorithm on the reply signal to provide light of the tunable optical module.
- Wavelength information can be set.
- the predetermined condition may be that the power of the reply signal is above a certain level.
- the display apparatus may further include a screen output unit configured to display the optical wavelength information so that a user may monitor it.
- connection unit may support at least one of an SFP interface, an SFP + interface, an XFP interface, and a CFP interface.
- an optical wavelength setting method of an optical network device includes: extracting wavelength information of the line management signal by analyzing a line management signal received from an optical line termination device; Selecting a first wavelength based on wavelength information of the line management signal to transmit the test signal, and determining whether a result of detecting power of a return signal to the test signal satisfies a predetermined condition; And setting the optical wavelength information of the tunable optical module by executing a center wavelength sensing algorithm on the reply signal when a result of sensing the power of the reply signal satisfies the predetermined condition.
- the optical wavelength setting method of the optical network device may further include connecting a cable connected to the optical network device to a wavelength setting auxiliary device before extracting the wavelength information. .
- the optical wavelength setting method of the optical network device includes: after the setting of the optical wavelength information, displaying the optical wavelength information for monitoring by a user; And separating the cable from the wavelength setting auxiliary device, and connecting the cable to the optical network device through the tunable optical module.
- the predetermined condition may be a condition in which the power of the reply signal is greater than or equal to a certain level.
- the accurate optical wavelength setting of the tunable optical module of the optical network device can be easily and automatically processed in the field. It can be effective.
- FIG. 1 is a view briefly illustrating a wavelength division optical network according to an embodiment of the inventive concept.
- FIG. 2 is a block diagram illustrating in detail the auxiliary device for setting a wavelength shown in FIG. 1.
- FIG. 3 is a flowchart illustrating an optical wavelength setting method of the wavelength division optical network shown in FIG. 1.
- FIG. 4 is a view briefly illustrating a wavelength division optical network according to another embodiment of the inventive concept.
- FIG. 5 is a view briefly illustrating a wavelength division optical network according to another embodiment according to the spirit of the present invention.
- one component when one component is referred to as “connected” or “connected” with another component, the one component may be directly connected or directly connected to the other component, but in particular It is to be understood that, unless there is an opposite substrate, it may be connected or connected via another component in the middle.
- ⁇ unit (unit) means a unit for processing at least one function or operation, which is hardware or software Or a combination of hardware and software.
- FIG. 1 is a view schematically illustrating a wavelength division optical network 10 according to an embodiment of the inventive concept.
- FIG. 2 is a block diagram illustrating in detail the auxiliary device for setting a wavelength shown in FIG. 1.
- the wavelength division optical network 10 may include an optical line terminal (OLT) 100, a remote node device RN, and a plurality of optical network devices.
- OLT optical line terminal
- RN remote node device
- ONU Optical Network Unit, 300-1 to 300-n).
- the optical line termination device 100 may include n (n is an integer of 1 or more) channel cards. Each channel card (not shown) corresponds to each optical network device 300-1 to 300-n, and has a signal having a different optical wavelength allocated for each optical network device 300-1 to 300-n. To communicate with a corresponding optical network device.
- the optical signal (downlink signal) for each wavelength ( ⁇ d1, ⁇ d2, ⁇ d3,..., ⁇ dn) generated by each channel card (not shown) is transmitted to the remote node device 200 through a single optical line.
- the optical signal for each wavelength separated by the node device 200 is transmitted to each optical network device 300-1 to 300-n through cables C1 to Cn, which are separate lines.
- the optical signals (uplink signals) for each of the wavelengths ⁇ u1, ⁇ u2, ⁇ u3,..., ⁇ un generated by the optical network devices 300-1 to 300-n also pass through the above components.
- the optical line termination device 100 may multiplex and output an optical signal for each wavelength ⁇ d1, ⁇ d2, ⁇ d3,..., ⁇ dn into one optical signal.
- the remote node device 200 may be connected to the optical line termination device 100 through a single optical line, and may be connected to each of the optical network devices 300-1 to 300-n through cables C1 to Cn provided for each channel. have.
- the remote node device 200 may receive the downlink signal and transmit the downlink signal to the optical network devices 300-1 to 300-n corresponding to each wavelength according to the wavelength of the downlink signal.
- the remote node device 200 may be implemented as an optical filter such as a WDM filter.
- the wavelength division optical network 10 is implemented through the principle that n independent communication channels are formed between the optical line termination device 100 and the optical network devices 300-1 to 300-n.
- Each optical network device 300-1 to 300-n may include a tunable optical module 350-1 to 350-n.
- the tunable optical modules 350-1 to 350-n can transmit and receive an optical signal having a specific wavelength so that each optical network device 300-1 to 300-n can communicate with the optical line termination device 100. have.
- the specific wavelength may be determined by optical wavelength information stored in the tunable optical modules 350-1 to 350-n.
- the tunable optical modules 350-1 to 350-n may be implemented as modules in a detachable form.
- the wavelengths ⁇ d1, ⁇ d2, ⁇ d3,..., ⁇ dn of the downlink signals transmitted from the optical line termination device 100, and the respective optical network devices 300-1 to ⁇ do not coincide with or deviate from a certain level. It is important not to. In other words, there is a need for a technique of matching the wavelengths ⁇ d1, ⁇ d2, ⁇ d3, ..., ⁇ dn of the downlink signal with the wavelengths ⁇ u1, ⁇ u2, ⁇ u3, ..., ⁇ un of the uplink signal.
- wavelengths of the downlink signals ⁇ d1, ⁇ d2, ⁇ d3,..., ⁇ dn and the wavelengths of the uplink signals ⁇ u1, ⁇ u2, ⁇ u3,..., ⁇ un are changed by external factors such as air temperature changes, Cutoffs or interference with other channels' wavelengths can result in severe communication degradation.
- the wavelengths ⁇ d1, ⁇ d2, ⁇ d3,..., ⁇ dn of the downlink signal and the wavelengths ⁇ u1, ⁇ u2, ⁇ u3,..., ⁇ un of the uplink signal coincide with each other.
- the wavelength setting auxiliary device 500 is used.
- the wavelength setting auxiliary apparatus 500 sets the optical wavelength of the tunable optical module 350-2, but the scope of the present invention is not limited thereto. Substantially the same technical idea may be applied to the module (eg, 350-1).
- the wavelength setting auxiliary device 500 may be used when setting the optical wavelength of the optical transceiver, for example, the channel card, of the optical line termination device 100 as described below with reference to FIG. 4.
- the wavelength setting auxiliary device 500 may be connected to the cable C2.
- the tunable optical module 350-2 mounted on the optical network device 300-2 may be detached from the optical network device 300-2 and mounted on the auxiliary device 500 for wavelength setting.
- the wavelength setting auxiliary apparatus 500 may include an optical wavelength analyzer 510, a connection unit 550, and a screen output unit 570.
- the optical wavelength analyzer 510 may include a reception signal detector 520, a reception signal analyzer 530, and an optical wavelength transmitter 540.
- the reception signal detector 520 and the optical wavelength transmitter 530 may be connected to the cable C2, respectively, and may transmit and receive an optical signal to and from the optical line termination device 100 through the remote node device 200.
- the reception signal detector 520 may detect an optical signal input through the remote node apparatus 200, that is, a reception signal, and transmit the received signal to the reception signal analyzer 530.
- the received signal analyzer 530 may detect the wavelength and power of the received signal, and control the optical variable wavelength transmitter 540 or execute a center wavelength sensing algorithm based on the wavelength and power of the received signal. May be generated and transmitted to the tunable optical module 350-2 through the connection unit 550. Optical wavelength information and the center wavelength detection algorithm will be described later with reference to FIG. 3.
- the optical wavelength variable transmitter 540 transmits a test signal having a specific wavelength (eg, a first wavelength) determined by the control of the reception signal analyzer 530 through the remote node device 200 to the optical line termination device. 100 can be sent.
- a specific wavelength eg, a first wavelength
- connection unit 550 may be connected to the tunable optical module 350-2 mounted on (or inserted into) the wavelength setting auxiliary device 500 to transmit the optical wavelength information to the tunable optical module 350-2. . That is, the connection unit 550 may interface data transmitted between the optical wavelength analyzer 510 and the tunable optical module 350-2.
- the connection unit 550 may support an interface type of various types of tunable optical modules 350-2.
- the connection 550 may include a GigaBit Interface Converter (GBIC) interface, a small form-factor pluggable (SFP) interface, an SFP + interface, a 10 Gigabit Small Form Factor Pluggable (XFP) interface, and a 100 Gigabit Form Factor Pluggable (CFP) interface. It can support at least one of the interfaces.
- GBIC GigaBit Interface Converter
- SFP small form-factor pluggable
- XFP 10 Gigabit Small Form Factor Pluggable
- CFP 100 Gigabit Form Factor Pluggable
- the connection unit 550 may support a non-standardized interface.
- the connection unit 550 may support an I2C communication function.
- the screen output unit 570 may display information generated by the reception signal analyzer 530 including the optical wavelength information so that a user may monitor it.
- the screen output unit 570 may be implemented as a liquid crystal display (LCD).
- FIG. 3 is a flowchart illustrating an optical wavelength setting method of the wavelength division optical network shown in FIG. 1.
- the cable C2 connected to the optical network device 300-2 is disconnected. It may be connected to the wavelength setting auxiliary device 500 (S10).
- the received signal detector 520 may detect the line management signal received from the optical line termination device 100 and transmit the detected line management signal to the received signal analyzer 530.
- the line management signal may be a signal for verifying a connection state of the optical network device 300-2, but the scope of the present invention is not limited thereto.
- the received signal analyzer 530 may analyze the line management signal and extract wavelength information of the line management signal. That is, the received signal analyzer 530 may analyze the optical wavelength of the line management signal and extract wavelength information about the analyzed optical wavelength (S20).
- the received signal analyzer 530 may select the first wavelength based on the wavelength information of the line management signal.
- the first wavelength may be the same as the optical wavelength of the line management signal.
- the received signal analyzer 530 may control the optical wavelength variable transmitter 540 to generate the test signal having the first wavelength and transmit the generated test signal to the optical line termination apparatus 100 (S30).
- the received signal analyzer 530 may detect the power of a reply signal with respect to the test signal transmitted from the received signal detector 520, and determine whether the result satisfies a predetermined condition (S40).
- the predetermined condition may be whether the power of the reply signal is greater than or equal to a specific level PWR.
- the specific level PWR may correspond to a level capable of discriminating whether it is a normal detected signal.
- the optical line termination device 100 When the optical line termination device 100 normally receives a test signal having the first wavelength, the optical line termination device 100 transmits a reply signal to the optical network device 300-2.
- the power of the reply signal may be greater than or equal to the specific level PWR (Yes path of S40).
- the optical line termination device 100 When the optical line termination device 100 does not normally receive the test signal having the first wavelength, it does not transmit a reply signal to the test signal to the optical network device 300-2. Therefore, the power of the reply signal may be equal to or less than the specific level PWR.
- the reception signal analyzer 530 controls the optical wavelength variable transmitter 540 to generate a test signal having the new first wavelength having changed the existing first wavelength, and transmit the test signal to the optical line terminator 100.
- the power of the return signal with respect to the test signal may be sensed, and the result may be determined to satisfy a predetermined condition.
- the operation of changing the existing first wavelength is performed by sweeping the wavelength within a window of the available change range around the reference optical waveform of the optical network device 300-2. It can be implemented in a way to compare the power of the return signal. This may set the center wavelength to be actually used in step S50 to be described later.
- the operation of changing the existing first wavelength may be performed by controlling the temperature of the light source of the variable wavelength transmitter 540.
- the steps S30 and S40 may be repeated until the result satisfies a predetermined condition.
- This corresponds to a process of verifying that normal communication with the optical line termination device 100 is possible with the optical signal of the first wavelength.
- the tunable optical module 350-2 is more accurate optically capable of normal communication with the optical line terminator 100. Wavelength information can be set.
- the received signal analyzer 530 may determine the center wavelength of the reply signal through a center wavelength detection algorithm (S50).
- the center wavelength detection algorithm may be an algorithm that detects power for each wavelength of the return signal and generates optical wavelength information based on a wavelength that is the center of the return signal based on the power for each wavelength. For example, when the reply signal exhibits a Gaussian distribution with respect to the axis of power on the axis of wavelength, the center wavelength detection algorithm may generate optical wavelength information by detecting the center wavelength corresponding to the center axis.
- the received signal analyzer 530 may transmit the optical wavelength information to the tunable optical module 350-2 through the connection unit 550, and the tunable optical module 350-2 may store the optical wavelength information ( S60).
- the screen output unit 570 may generate the information generated by the reception signal analyzer 530 including the optical wavelength information (for example, the first wavelength, the status information of the reception signal detector 520, the optical wavelength variable transmitter 540, and the like). It can be displayed for user monitoring. Accordingly, the user monitors the state of the wavelength setting auxiliary device 500 using the information, and if necessary (eg, when the first wavelength deviates significantly from the reference light wavelength), the user of the wavelength setting auxiliary device 500 The operation may be controlled to operate normally (S70).
- the optical wavelength information for example, the first wavelength, the status information of the reception signal detector 520, the optical wavelength variable transmitter 540, and the like. It can be displayed for user monitoring. Accordingly, the user monitors the state of the wavelength setting auxiliary device 500 using the information, and if necessary (eg, when the first wavelength deviates significantly from the reference light wavelength), the user of the wavelength setting auxiliary device 500 The operation may be controlled to operate normally (S70).
- the user disconnects the wavelength setting auxiliary device 500 from the cable C2, and the optical network device 300-2.
- the cable C2 may be connected to the tunable optical module 350-2 by installing the tunable optical module 350-2.
- the tunable optical module 350-2 may communicate with the optical line terminator 100 with an optical signal having a wavelength based on the set optical wavelength information.
- an accurate optical wavelength of a tunable optical module for example, 350-2
- an optical network device for example, 300-2
- the operation method of the wavelength setting auxiliary device 500 may be embodied as computer readable codes on a computer readable recording medium.
- Computer-readable recording media include all kinds of recording media having data stored thereon that can be decrypted by a computer system. For example, there may be a read only memory (ROM), a random access memory (RAM), a magnetic tape, a magnetic disk, a flash memory, an optical data storage device, and the like.
- the computer readable recording medium can also be distributed over computer systems connected over a computer network, stored and executed as readable code in a distributed fashion.
- FIG. 4 is a view schematically illustrating a wavelength division optical network 10 ′ according to another embodiment of the inventive concept.
- the wavelength division optical network 10 'of FIG. 4 represents a network in which the central station side is configured to be active and the subscriber side is configured to be passive.
- the same reference numerals as in FIGS. 1 to 3 denote the same members, and hereinafter, redundant descriptions will be omitted for simplicity of explanation, and the following description will focus on differences from FIGS. 1 to 3.
- the optical line termination device 100 may include n (n is an integer of 1 or more) channel cards 110-1 to 110-n and a multiplexer / demultiplexer 120.
- the n channel cards 110-1 to 110-n correspond to the optical network devices 300-1 to 300-n, respectively, and are different from each other allocated to the optical network devices 300-1 to 300-n.
- An optical signal having a wavelength can be used to communicate with a corresponding optical network device.
- the n channel cards 110-1 to 110-n may each include tunable optical modules 150-1 to 150-n that transmit and receive optical signals having a specific wavelength, and the tunable optical modules 150-1. 150-n) may be used to communicate with the corresponding optical network device.
- the tunable optical modules 150-1 to 150-n correspond to the tunable optical modules 350-1 to 350-n described with reference to FIGS. 1 to 3, and thus a detailed description thereof will be omitted.
- the multiplexer / demultiplexer 120 may be connected to n channel cards 110-1 to 110-n and a predetermined transmission medium provided for each channel, for example, an optical cable, and may be connected to a remote node through a single transmission medium. It may be connected to the device 200.
- the multiplexer / demultiplexer 120 performs wavelengths ⁇ d1, ⁇ d2, ⁇ d3, ..., ⁇ dn generated by the tunable optical modules 150-1 through 150-n of the n channel cards 110-1 through 110-n.
- Multiple optical signals may be multiplexed and transmitted to the remote node device 200, and each wavelength ⁇ u1 transmitted from the optical network devices 300-1 to 300-n through the remote node device 200.
- n channel cards 110-1 to 110-n through the tunable optical modules 150-1 to 150-n by demultiplexing optical signals (uplink signal) for each of?,? u2,? u3, ...,? ⁇ ) Can be sent.
- the wavelength of the optical signal to be transmitted and received should not coincide with or deviate from a certain level by the center wavelength of each channel, as described with reference to FIGS. 1 to 3.
- the wavelength setting auxiliary device 500 is used similarly to the case where the wavelength is adjusted on the corresponding optical network device side to correspond to the wavelength of the optical signal of the specific channel card using the wavelength setting auxiliary device 500. Accordingly, the optical line termination device 100 may adjust the wavelength of the corresponding channel card to correspond to the wavelength of the optical signal of the specific optical network device.
- the wavelength of the optical signal generated by the tunable optical module 150-n of the channel card 110-n is set using the wavelength setting auxiliary device 500 on the optical line termination device 100 side. Listen and explain.
- the wavelength setting auxiliary device 500 transmits an optical signal transmitted from the optical network device 300-n to the remote node device 200 and the multiplexer / demultiplexer 120 through the tunable optical module 150-n. Can be received.
- the wavelength setting auxiliary device 500 may be connected to the tunable optical module 150-n through the connection unit 550 (see FIG. 2).
- the wavelength setting auxiliary device 500 may detect the wavelength and power of the optical signal, extract wavelength information based on the detected wavelength and power of the optical signal, and based on the extracted wavelength information.
- a test signal having a predetermined wavelength may be generated and transmitted to the optical network device 300-n.
- the wavelength setting auxiliary device 500 changes the test signal to the optical network device 300-n while varying the wavelength until the reply signal to the test signal is normally received from the optical network device 300-n. Can transmit
- the reply signal through the center wavelength detection algorithm is set.
- the central wavelength of may be determined, and optical wavelength information about the determined central wavelength may be generated and transmitted to the tunable optical module 150-n.
- the tunable optical module 150-n generates an optical signal having a wavelength based on the received optical wavelength information, so that the channel card 110-n can communicate with the corresponding optical network device 300-n. Will be.
- the optical line termination device 100 has separate components for automatically implementing wavelength locking, wavelength stabilization, and the like.
- the wavelength setting auxiliary device 500 can easily process the optical wavelength setting of the channel card, it is possible to reduce the manufacturing cost and to be simple and efficient management.
- FIG. 5 is a view schematically illustrating a wavelength division optical network 10 ′′ according to another embodiment of the inventive concept.
- the wavelength division optical network 10 ′′ of FIG. 5 represents a network in which the central station side and the subscriber side are configured passively.
- the same reference numerals as those in Figs. 1 to 4 denote the same members, and hereinafter, redundant descriptions will be omitted for simplicity of explanation, and the following description will focus on differences from Figs. 1 to 4.
- the optical line termination device 400 may include n channel cards 410-1 to 410-n and a central station node device 420.
- the n channel cards 410-1 to 410-n correspond to the optical network devices 300-1 to 300-n, respectively, and are different from each other assigned to each of the optical network devices 300-1 to 300-n.
- An optical signal having a wavelength can be used to communicate with a corresponding optical network device.
- the n channel cards 410-1 to 410-n may each include tunable optical modules 450-1 to 450-n that transmit and receive an optical signal having a specific wavelength, respectively. 450-n) may be used to communicate with the corresponding optical network device.
- the tunable optical modules 450-1 to 450-n correspond to the tunable optical modules 350-1 to 350-n described with reference to FIGS. 1 to 3, and thus a detailed description thereof will be omitted.
- the central station node apparatus 420 may be connected to n channel cards 410-1 to 410-n, respectively, through a predetermined transmission medium, for example, an optical cable, and may be connected to the remote node apparatus 200 through a single transmission medium. ) Can be connected.
- a predetermined transmission medium for example, an optical cable
- the central station node apparatus 420 is provided with the wavelengths ⁇ d1, ⁇ d2, ⁇ d3,..., ⁇ dn generated by the tunable optical modules 450-1 through 450-n of the n channel cards 410-1 through 410-n.
- Optical signals can be transmitted to the remote node device 200, and each wavelength ( ⁇ u1, ⁇ u2) transmitted from the optical network devices 300-1 to 300-n through the remote node device 200.
- n channel cards 110-1 to 110- corresponding to optical signals (uplink signal) for each of?,? u3, ...,? un) through tunable optical modules 450-1 to 450-n according to the wavelength set for each channel. n).
- the central station node apparatus 420 may be implemented with, for example, an optical filter.
- the optical line termination device 400 is a central station node device 420 in which the channel cards 410-1 to 410-n are passive elements. It is connected to the remote node device 200 through. Even in such a case, the wavelength setting auxiliary device 500 may be used to adjust the wavelength of the corresponding channel card to correspond to the wavelength of the optical signal of the specific optical network device at the optical line termination device 100. Although not shown in FIG. 5, the auxiliary device 500 for wavelength setting may also be performed on the optical network devices 300-1 to 300-n of the wavelength division optical network 10 ′′ similar to those of FIGS. 1 to 3. Of course it can be used.
- the wavelength of the optical signal generated by the tunable optical module 450-n of the channel card 410-n is set by using the wavelength setting auxiliary device 500 on the optical line termination device 400 side. Listen and explain.
- the wavelength setting auxiliary device 500 transmits an optical signal transmitted from the optical network device 300-n to the remote node device 200 and the central station node device 420 through the tunable optical module 450-n. Can be received.
- the wavelength setting auxiliary device 500 may be connected to the tunable optical module 450-n through the connection unit 550 (see FIG. 2).
- the wavelength setting auxiliary device 500 may detect the wavelength and power of the optical signal, extract wavelength information based on the detected wavelength and power of the optical signal, and based on the extracted wavelength information.
- a test signal having a predetermined wavelength may be generated and transmitted to the optical network device 300-n.
- the wavelength setting auxiliary device 500 may vary the wavelength of the test signal to the optical network device 300-n until a reply signal to the test signal is normally received from the optical network device 300-n. Can transmit
- the reply signal through the center wavelength detection algorithm is set.
- the central wavelength of may be determined, and optical wavelength information about the determined central wavelength may be generated and transmitted to the tunable optical module 450-n.
- the tunable optical module 450-n generates an optical signal having a wavelength based on the received optical wavelength information, so that the channel card 410-n can communicate with the corresponding optical network device 300-n. Will be.
- the wavelength setting auxiliary device 500 allows the administrator to easily process the optical wavelength setting of the channel card and the optical network device in the wavelength division optical network 10 '' composed of passive elements. Even if the network is built at low cost, stable operation and efficient management are possible.
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Abstract
Description
Claims (12)
- 광 선로 종단 장치(optical line terminal)로 제1 파장을 가진 테스트 신호를 전송하고, 상기 테스트 신호에 대한 회신 신호의 파워를 감지한 결과를 기초로 중심 파장 감지 알고리즘을 실행하여 튜너블 광 모듈(tunable optical module)의 광 파장 정보를 설정하는 광 파장 분석부; 및상기 튜너블 광 모듈과 접속되어 상기 광 파장 분석부와 상기 튜너블 광 모듈 사이에 전송되는 데이터를 인터페이싱(interfacing)하는 접속부;를 포함하는 파장 설정용 보조 장치.
- 제1항에 있어서,상기 광 파장 분석부는,상기 광 선로 종단 장치로부터의 수신 신호를 검출하는 수신 신호 검출기;상기 수신 신호의 파장과 파워를 감지하고, 상기 광 파장 정보를 상기 접속부로 전송하는 수신 신호 해석기; 및상기 테스트 신호를 전송하는 광 파장 가변 송신기;를 포함하는 파장 설정용 보조 장치.
- 제1항에 있어서,상기 광 파장 분석부는,상기 광 선로 종단 장치로부터 수신된 회선 관리 신호를 분석하여 상기 회선 관리 신호의 파장 정보를 추출하는 파장 설정용 보조 장치.
- 제3항에 있어서,상기 광 파장 분석부는,상기 회선 관리 신호의 파장 정보를 기초로 상기 제1 파장을 선택하여 상기 테스트 신호를 전송하고, 상기 회신 신호의 파워를 감지한 결과가 미리 정해진 조건을 만족하는지 판단하는 파장 설정용 보조 장치.
- 제4항에 있어서,상기 광 파장 분석부는,상기 회신 신호의 파워를 감지한 결과가 상기 미리 정해진 조건을 만족하는 경우, 상기 회신 신호에 대해 상기 중심 파장 감지 알고리즘을 실행하여 상기 튜너블 광 모듈의 광 파장 정보를 설정하는 파장 설정용 보조 장치.
- 제5항에 있어서,상기 미리 정해진 조건은 상기 회신 신호의 파워가 특정 레벨 이상인 조건인 파장 설정용 보조 장치.
- 제1항에 있어서,상기 광 파장 정보를 사용자가 모니터링할 수 있도록 디스플레이하는 화면 출력부;를 더 포함하는 파장 설정용 보조 장치.
- 제1항에 있어서,상기 접속부는,SFP 인터페이스, SFP+ 인터페이스, XFP 인터페이스, 및 CFP 인터페이스 중 적어도 하나를 지원하는 파장 설정용 보조 장치.
- 광 선로 종단 장치로부터 수신된 회선 관리 신호를 분석하여 상기 회선 관리 신호의 파장 정보를 추출하는 단계;상기 회선 관리 신호의 파장 정보를 기초로 제1 파장을 선택하여 상기 테스트 신호를 전송하고, 상기 테스트 신호에 대한 회신 신호의 파워를 감지한 결과가 미리 정해진 조건을 만족하는지 판단하는 단계; 및상기 회신 신호의 파워를 감지한 결과가 상기 미리 정해진 조건을 만족하는 경우, 상기 회신 신호에 대해 중심 파장 감지 알고리즘을 실행하여 튜너블 광 모듈의 광 파장 정보를 설정하는 단계;를 포함하는 광 네트워크 장치의 광 파장 설정 방법.
- 제9항에 있어서,상기 파장 정보를 추출하는 단계 이전에,상기 광 네트워크 장치에 연결된 케이블을 파장 설정용 보조 장치에 연결하는 단계;를 더 포함하는 광 네트워크 장치의 광 파장 설정 방법.
- 제10항에 있어서,상기 광 파장 정보를 설정하는 단계 이후에,상기 광 파장 정보를 사용자가 모니터링할 수 있도록 디스플레이하는 단계; 및상기 파장 설정용 보조 장치로부터 상기 케이블을 분리하고, 상기 튜너블 광 모듈을 통해 상기 광 네트워크 장치에 상기 케이블을 연결하는 단계;를 더 포함하는 광 네트워크 장치의 광 파장 설정 방법.
- 제9항에 있어서,상기 미리 정해진 조건은 상기 회신 신호의 파워가 특정 레벨 이상인 조건인 광 네트워크 장치의 광 파장 설정 방법.
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| KR1020167032852A KR102640505B1 (ko) | 2015-11-20 | 2016-11-18 | 파장 설정용 보조 장치 및 광 네트워크 장치의 광 파장설정 방법 |
| EP16866694.9A EP3376694A4 (en) | 2015-11-20 | 2016-11-18 | WAVE LENGTH ADJUSTMENT DEVICE AND METHOD FOR ADJUSTING THE OPTICAL WAVELENGTH OF AN OPTICAL NETWORK DEVICE |
| US15/777,475 US10763959B2 (en) | 2015-11-20 | 2016-11-18 | Auxiliary device for setting wavelength and method for setting optical wavelength of optical network unit |
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| KR10-2015-0163455 | 2015-11-20 | ||
| KR20150163455 | 2015-11-20 |
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| US (1) | US10763959B2 (ko) |
| EP (1) | EP3376694A4 (ko) |
| KR (1) | KR102640505B1 (ko) |
| WO (1) | WO2017086742A1 (ko) |
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| US12627378B2 (en) * | 2022-06-29 | 2026-05-12 | Centre For Development Of Telematics (C-Dot) | Method and a system for tuning tunable optical transceivers |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20180337728A1 (en) | 2018-11-22 |
| EP3376694A4 (en) | 2019-08-07 |
| KR102640505B1 (ko) | 2024-02-27 |
| US10763959B2 (en) | 2020-09-01 |
| EP3376694A1 (en) | 2018-09-19 |
| KR20180074539A (ko) | 2018-07-03 |
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