KR100675839B1 - Optical Characteristic Monitoring and Control System and Method for Optical Transceiver of Wavelength Division Multiplexing Passive Optical Subscriber Network (HDD-POON) - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an optical characteristic monitoring, control system and method for an optical transmission / reception apparatus of a WDM-PON based wavelength division multiplexing, comprising: an optical path termination device (OLT) and a plurality of optical subscriber station devices (ONU) The optical power and the wavelength change of each optical transmitting and receiving device provided therein is monitored, and the monitoring information on the optical power and the optical wavelength is transmitted to the monitoring control unit mounted on the external terminal through the SNMP trap service, and the monitoring control unit is The control information on the optical power and the optical wavelength according to the monitoring information is transmitted to the OLT and each ONU through the SNMP to control the optical power and the optical wavelength.

 WDM-PON, Optical Transceiver, SNMP, OLT, ONU, Monitoring, Optical Characteristics

Description

System and method for monitoring and controlling the optical characteristics of the optical transceiver in WDM-PONs}

1 is a block diagram of a wavelength division multiplexing based passive optical subscriber network (WDM-PON) to which the present invention is applied.

2 is a block diagram of an optical characteristic monitoring and control system of an optical transmitting and receiving device according to the present invention.

3 is a flowchart illustrating an optical characteristic monitoring and control method of an optical transmitting and receiving apparatus according to an embodiment of the present invention.

 Explanation of symbols on the main parts of the drawings

200: Optical ray termination device (OLT) 230: Optical subscriber terminal device (ONU)

211,231: Optical transmitting and receiving device 212,232: Optical characteristic change monitoring unit

213,233: optical power / wavelength control unit 214: cutting state detection unit

220,234: monitoring / control signal transmission unit 250: optical characteristics monitoring / control unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passive optical network (PON) based on wavelength division multiplexing (WDM), and particularly to monitor optical characteristics of an optical transceiver for transmitting and receiving optical signals in a WDM-based PON network. And to systems and methods for controlling.

The recent FTTH (Fiber To The Home) based optical subscriber network project aims to provide optical technology-based broadband transmission bandwidth by finally laying optical fibers between individual service subscribers and a central base station. To this end, based on the optical technology used in the existing backbone, related technologies such as optical fiber technology, wavelength division multiplexing (WDM) technology, optical device technology, optical fiber distribution technology, etc. are being developed for constructing an efficient and economical optical subscriber network. As a result, studies on ATM and Ethernet based passive optical subscriber networks (PONs) in a single star type subscriber network have been actively conducted, and are currently reaching commercialization. In addition, the PON structure using the time division multiplexing (TDM) technique has a wavelength division multiplexing-based passive optical subscriber network that allocates unique wavelengths to each subscriber while ultimately satisfying a required bandwidth due to limitations in transmission capacity. Hereinafter, it will be referred to as WDM-PON form, and active research is being conducted on this.

Since WDM-PON allocates individual wavelengths to each subscriber, it is very effective as an optical subscriber network that provides next-generation multimedia services because it has the advantage of providing giga-class high-capacity data services to subscribers without difficulty. . However, WDM-PON is allocated to each subscriber whose wavelengths are scattered in the region, and the allocated optical wavelength is very sensitive to transmission distance and operating environment (temperature, etc.). Particularly, in the case of the passive optical subscriber network (PON), it is impossible to manage the state of the passive elements located on the optical transmission path, so it is necessary to monitor the optical characteristics of the optical transceiver to determine the operation state of the passive elements located on the line. There is this.

In spite of this necessity, however, due to the complexity of the subscriber-side network structure, the method of transmitting information to the central base station by constantly monitoring the optical characteristics of the optical transceiver in the WDM-PON network has not been studied.

On the other hand, Korean Patent Application No. 2002-0056163 (name: WDM-PON optical path monitoring device using an optical shuffler) and 2002-0055014 (name: WDM-PON optical path monitoring using an OTDR (Optical Time Domain Reflectometer) In the WDM-PON system, the OTDR supervisory light is put into the optical path through which optical signals of wavelengths diverged from each other in wavelength are transmitted, and the supervisory light reflected by each ONU is compared with a reference signal to simultaneously transmit optical signals and physically Provide a device for monitoring status.

In addition, US Pat. No. 6,304,350 (named Temperature compensated multi-channel, wavelength-division-multiplexed passive optical network) includes a method for controlling the oscillation wavelength of a multi-wavelength output light source at each remote node located within a WDM-PON system. The temperature compensation device of the WDM-PON system is presented.

However, the above-mentioned prior arts do not present a technique for monitoring and controlling the optical characteristics of the optical transceiver for transmitting and receiving optical signals in the WDM-PON system.

The present invention has been proposed to solve the above-described problems, and the optical subscriber station of the optical fiber terminal (OLT) and the subscriber end in the central base station using the standard protocol (SNMP) in the central base station constituting the WDM-PON An object of the present invention is to provide an optical characteristic monitoring, control system and method of an optical transmitting / receiving apparatus of WDM-PON capable of constantly monitoring / controlling optical characteristic information of each optical transmitting / receiving apparatus of an apparatus (ONU).

In order to achieve the above object, the present invention provides a wavelength division multiplexing-based passive optical subscription including an optical path termination device (OLT) and a plurality of optical subscriber station devices (ONU) for transmitting and receiving optical signals) through an optical transmission and reception device. In the optical characteristics monitoring and control system of the optical transmission and reception apparatus in a magnetic network (WDM-PON),

An optical characteristic change monitoring unit for monitoring a change in optical power and optical wavelength of each optical transmitting / receiving device provided in the OLT and the plurality of ONUs; An optical characteristic monitoring / control unit which receives a monitoring signal of the optical characteristic change monitoring unit and outputs a control signal for adjusting the optical power and the optical wavelength of the corresponding optical transmission / reception device according to the monitoring signal; An optical power / wavelength control unit for receiving the control signal output from the optical characteristic monitoring / control unit and controlling the optical power and the optical wavelength of the optical transmission / reception apparatus according to the control signal; And a monitoring / control signal which receives the monitoring signal from the optical characteristic change monitoring unit and transmits the monitoring signal to the optical characteristic monitoring / control unit, and receives the control signal from the optical characteristic monitoring / control unit and transmits the control signal to the optical power / wavelength control unit. It includes a delivery unit.

In one embodiment of the present invention, the above-described optical characteristic monitoring and control system of the present invention may further include a cutting state detection unit for detecting a cutting state of the optical fiber of the link between the optical transmitting and receiving devices of the OLT and ONU.

In addition, the present invention for achieving the above object, the wavelength division multiplexing-based passive type including an optical fiber terminal device (OLT) and a plurality of optical subscriber terminal device (ONU) for transmitting and receiving optical signals through each optical transmission and reception device; In the optical characteristics monitoring and control method of the optical transmission and reception apparatus in the optical subscriber network (WDM-PON),

An optical characteristic change monitoring step of monitoring a change in optical power and optical wavelength of each optical transmitting and receiving device in the OLT and the plurality of ONUs; A monitoring signal transmission step of transmitting the monitoring signal of the optical characteristic change monitoring step to an upper optical characteristic monitoring / control unit located at a remote location through a simple network management protocol (SNMP); A control signal transmission step of transmitting, by the upper optical characteristic monitoring / control unit, the control signal of the optical power and the optical wavelength of the corresponding optical transmission and reception device according to the received monitoring signal through the simple network management protocol (SNMP); And an optical power / wavelength control step of controlling the optical power and the optical wavelength of the corresponding optical transmission / reception apparatus according to the transmitted control signal.

In one embodiment of the present invention, the optical characteristic monitoring and control method according to the present invention may further include a cutting state detecting step of detecting an optical fiber cutting state of a link between each optical transmitting and receiving device of the OLT and ONU. .

Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, in the case where it is determined that detailed descriptions of related well-known functions or configurations may unnecessarily obscure the subject matter of the present invention, detailed descriptions thereof will be omitted so as not to obscure the subject matter of the present invention. will be.

1 is a block diagram of a wavelength division multiplexing based passive optical subscriber network (WDM-PON) to which the present invention is applied. As shown in FIG. 1, the WDM-PON to which the present invention is applied is a tree based on a wavelength division multiplexer / demultiplexer 210 that exists in a remote node 200 and serves as an optical splitter. Has a structure. As such, optical fibers used for a plurality of subscriber services are shared to the maximum distance, thereby reducing the cost. In order to apply the WDM technology to the PON type subscriber distribution structure, the wavelength division multiplexer / demultiplexer 210 separates a plurality of multiplexed wavelengths in one optical fiber. The WDM-PON provides a fundamentally higher bandwidth than the complex WDM network structure based on the TDM scheme.

In addition, the WDM-PON includes an optical fiber termination device (hereinafter referred to as OLT) 100 and a plurality of optical subscriber terminal devices (hereinafter referred to as ONU) 300. The OLT 100 includes a plurality of line cards 110, and an optical transmitter / receiver 111 for transmitting and receiving optical signals having different wavelengths to each line card 110. In addition, the OLT 100 is a wavelength division multiplexer / demultiplexer 120 for multiplexing or demultiplexing an optical signal wavelength and a monitoring signal for the optical power and the optical wavelength of the optical transmitting and receiving device 111 in the OLT and the optical transmitting and receiving device. It is configured to include a monitoring / control signal transmission unit 130 for transmitting a control signal for the optical power and optical wavelength of (111).

In addition, each ONU 300 is a light transmission and reception device for transmitting and receiving optical signals of different wavelengths 311 and the monitoring signal for the optical power and optical wavelength of each optical transmission and reception device 311 in the ONU 300 and It comprises a monitoring / control signal transmission unit 320 for transmitting a control signal for the optical power and optical wavelength of the optical transmission and reception device 311.

Here, when the optical transmission and reception device 111 and the monitoring / control signal transmission unit 130 of the OLT 100 is compared with the optical transmission and reception device 311 and the monitoring / control signal transmission unit 320 of the ONU 300. The fundamental function is the same.

In addition, the WDM-PON shown in FIG. 1 has optical characteristics of the OLT 100 and the individual ONU 300 by the OLT 100 and the individual ONU 300 through a simple network management protocol (SNMP) 600. And an optical characteristic monitoring / control unit 700 for monitoring and controlling (optical characteristic) at the same time.

Referring to FIG. 1, an optical signal for each wavelength generated by the optical transmitter / receiver 111 of the OLT 100 is transmitted to the optical path 400 through the wavelength division multiplexer / demultiplexer 120, and then a remote node. Through the wavelength division multiplexer / demultiplexer 210 present in the (Remote Node) 200, it is input to the optical transmitter / receiver 311 existing in the individual ONU 300 through another optical line 500. On the contrary, the optical signal traveling from the ONU 300 to the OLT 100 also passes through the above components. At this time, the monitoring / control signal transmission unit (130,320) for transmitting the optical characteristic monitoring and control information for the optical transmission and reception device (111,311) of the OLT (100) and ONU 300 through a network using a simple network protocol (SNMP) ) Are mounted on the OLT 100 and ONU 300, respectively. Optical characteristics of the optical transmitter and receiver 111 present in the OLT 100 and the optical transmitter and receiver 311 located in the ONU 300 are monitored in real time, and are generated in each of the optical transmitter and receivers 111 and 311. Surveillance information including the event is transmitted to the optical characteristic monitoring / control unit 700 through the simple network management protocol (SNMP) 600 by the monitoring / control signal transmission unit (130, 320), the optical characteristic monitoring / The optical characteristic control signal generated from the control unit 700 is also transmitted to the OLT 100 and the individual ONU 300 by the monitoring / control signal transmission units 130 and 320 through the SNMP 600. Here, each of the monitoring / control signal transmission unit 130, 320 and the optical characteristic monitoring / control unit 700 may be implemented in hardware or software, in particular may be implemented in a microprocessor or a specific program.

2 is a block diagram of an optical characteristic monitoring and control system of an optical transmitting and receiving apparatus in a WDM-PON according to the present invention. The optical characteristic monitoring and control system according to the present invention, the optical characteristic change monitoring unit for monitoring the change in the optical power and optical wavelength of each optical transmitting and receiving device (111,311) provided in the OLT (100) and the plurality of ONU (300) (112, 312), and receives the monitoring signal from the optical characteristic change monitoring unit (112, 312) and transmits to the optical characteristic monitoring / control unit 700 using the simple network management protocol 600, the optical characteristic monitoring / control unit 700 Supervision / control signal transmission unit (130,320) for receiving the control signal of the optical power and optical wavelength according to the monitoring signal and transmits to the optical power / wavelength control unit (113,313), and transmission from the monitoring / control signal transmission unit (130,320) The monitoring signal and the monitoring / control signal transmission unit 130 or 320 to control the optical power and optical wavelength control signals of the corresponding optical transmission and reception apparatuses 111 and 311 through the simple network management protocol 600 according to the monitoring signal. To send to And an optical power / wavelength control unit 113 and 313 for controlling the optical power and the optical wavelength of the corresponding optical transmission and reception apparatuses 111 and 311 according to the control signal output from the monitoring / control unit 700 and the optical characteristic monitoring / control unit 700. It is configured by. Here, in another embodiment of the present invention, the optical characteristic monitoring and control system of the present invention detects an optical fiber cutting state of a link between the optical transmitting and receiving devices 111 and 311 of the OLT 100 and the individual ONU 300. The cutting state detection unit 114 may further include.

Referring to FIG. 2, the OLT 100 includes a plurality of OLT line cards (LCs) 110, and each of the line cards 110 includes an optical transmitter / receiver 111 and an optical characteristic change monitor. 112, an optical power / wavelength control unit 113 is mounted. In this case, each line card 110 may be equipped with a cutting state detector 114.

The optical transceivers 111 and 311 transmit and receive optical signals having different wavelengths. The optical characteristic change monitoring units 112 and 312 monitor changes in the transmission (Tx) optical power, the reception (Rx) optical power, and the optical wavelength of the optical transmitting and receiving devices 111 and 311. Here, in a preferred embodiment of the present invention, the optical characteristic change monitoring unit 112, 312 preferably monitors Tx and Rx optical power by using a monitoring photodiode (PD), and is installed in the light source. The temperature value of the light source is sensed using the thermistor's voltage value and the resulting change in light wavelength is monitored. The cutting state detection unit 114 determines the optical fiber cutting state of the link between the OLT 100 and each individual ONU 300, the input of all the optical transmitting and receiving device 111 of the OLT 100 received the up signal If it is less than the preset value, it is determined that the uplink optical fiber is cut. In addition, if the light of the downlink light source passes through the downlink fiber, the fiber is normally affected by Rayleigh back-scattering, but if the fiber is cut, it is pulsed by Fresnel reflection. Large reflections in the form of pulses occur. The cutting state of the optical fiber is determined by sensing the power of the reflected optical signal.

As such, the optical characteristic monitoring signals of the optical characteristic change monitoring units 112 and 312 are transmitted to the monitoring / control signal transmission units 130 and 320. The monitoring / control signal transmission unit 130, 320 transmits and receives a monitoring signal and a control signal for optical power / wavelength, respectively, through device drivers 131 and 321 for driving the device and a simple network management protocol (SNMP). And agents 132,322. The monitoring / control signal transmission unit 130, 320 transmits the monitoring signal to the optical characteristic monitoring / control unit 700 using SNMP, and the optical power transmitted from the optical characteristic monitoring / control unit 700 through the SNMP. The optical wavelength control signal is transmitted to the optical power / wavelength control units 113 and 313. The optical characteristic monitoring / control unit 700 monitors and controls an SNMP manager 711 for receiving and transmitting an optical signal and a control signal for optical power / wavelength and an actual optical characteristic through SNMP. Module 712 is configured.

The monitoring control module 712 may be mounted in an external terminal processor, and collects optical characteristic state information of the optical transmitting and receiving devices 111 and 311 of the entire WDM-PON network by using an SNMP service, and according to the optical characteristic state information. Control information for the optical transmission and reception apparatuses 111 and 311 is transmitted using an SNMP service. In addition, when a transmission (Tx) optical power, a reception (Rx) optical power, or a transmission (Tx) wavelength of a specific optical transmission / reception device changes, it is possible to asynchronously receive using an SNMP trap service. When the abnormality of the optical transmission and reception apparatuses 111 and 311 is detected by the trap, the monitoring control module 712 collects the information of all the optical transmission and reception apparatuses 111 and 311 from the WDM-PON network through the SNMP service. The control signal for the optical characteristic of (111,311) is transmitted.

The SNMP manager 711 and the SNMP agent 712 used for the monitoring and control functions of the optical transmitting and receiving devices 111 and 311 are compatible with the Request for Comments (RFC) standard, and only optical characteristic parameters (for example, optical power, optical wavelength, In order to accommodate light source temperature, pulses, etc., it may be extended and used through a private MIB. In addition, the device drivers 131 and 321 mounted in the processor of the OLT 100 and the individual ONU 300 transmit the control information transmitted from the upper level to the optical transmitting and receiving devices 111 and 311 and also from the optical transmitting and receiving devices 111 and 311. It performs the function of transferring the information to the SNMP.

Here, it should be noted that each functional unit in the individual ONU 300 corresponding to each functional unit in the OLT 100 has the same function, and overlapping description is omitted.

In the above description, the optical power of the optical transmission and reception devices 111 and 311 is preferably monitored through a monitoring photodiode, and the control of the optical power of the optical transmission and reception devices 111 and 311 by changing the current input to the driving circuit of the light source. Is done. In addition, it is preferable to detect the change in the light wavelength in accordance with the temperature change of the light source of the light transmitting and receiving devices (111,311). That is, since the wavelength of light varies depending on the temperature of the light sources of the light transmitting and receiving devices 111 and 311, the change in the optical power is monitored by reading the voltage value of the thermistor installed in the light source. Further, control of the light wavelength of the transceivers 111 and 311 is achieved by controlling the temperature of the light source.

3 is a flowchart illustrating an optical characteristic monitoring and control method of an optical transmitting and receiving apparatus according to an embodiment of the present invention. Referring to FIG. 3, when the WDM-PON transmits (Tx) optical power, receive (Rx) optical power, or optical wavelength change of the optical transmitting / receiving devices 111 and 311, the light source temperature is changed, or the optical fiber is When cut (S301), the optical characteristic change monitoring units 112 and 312 detect the change of the optical characteristic (S302). In such a change in the optical transmission and reception apparatuses 111 and 311 or the optical fiber, the change in the optical power is monitored using a monitoring photodiode, and the temperature of the light source for monitoring the change in the optical wavelength is measured using a thermistor installed in the light source. Monitoring of the cleavage state of the optical fiber is accomplished by detecting pulses reflected through the optical fiber.

As such, when the optical characteristic change monitoring unit 112 or 312 detects the optical characteristic change, the monitoring / control signal transmission unit 130 or 320 receives the monitoring signal according to the optical characteristic change and monitors the optical characteristic using the SNMP trap service. Transmitting to the control unit 700 (S303), the optical characteristic monitoring / control unit 700 obtains the monitoring information about the optical characteristic change of the optical transmission and reception apparatus of the network by using the SNMP get (S304) . Subsequently, the optical characteristic monitoring / control unit 700 executes a monitoring control algorithm in response to the monitoring signal to generate an optical characteristic control signal according to the optical characteristic change (S305), and converts the control signal into an SNMP set. It transmits to the monitoring / control signal transmission unit (130,320) through SNMP (S306). When the monitoring / control signal transmission unit 130 or 320 transmits the control signal to the optical power / wavelength control units 113 and 313, the optical power / wavelength control unit 113 and 313 controls the optical power and the optical wavelength of the optical transmission and reception devices 111 and 311. (S307). At this time, the optical power is controlled by adjusting the voltage applied to the driving circuit of the light source, and the optical wavelength is controlled by changing the temperature of the light source.

The drawings and detailed description of the invention are merely exemplary of the invention, which are used for the purpose of illustrating the invention only and are not intended to limit the scope of the invention as defined in the appended claims or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

In the WDM-PON network according to the present invention, the optical state information of the optical transmitting / receiving apparatus operating in each OLT and each ONU can be monitored in real time, and can be controlled in real time to have an arbitrary optical characteristic.

In addition, the optical characteristics monitoring and control system of the optical transmission and reception apparatus in the WDM-PON network according to the present invention has the advantage that can be economically implemented, the installation and maintenance of the device is simple.

Claims (14)

 Optical transmission and reception device in a wavelength division multiplexing-based passive optical subscriber network (WDM-PON) including an optical fiber terminal device (OLT) and a plurality of optical subscriber station devices (ONU), each of which transmits and receives an optical signal through an optical transmitter and receiver. In the optical characteristic monitoring and control system of An optical characteristic change monitoring unit for monitoring a change in optical power and optical wavelength of each optical transmitting / receiving device provided in the OLT and the plurality of ONUs; An optical characteristic monitoring / control unit which receives a monitoring signal of the optical characteristic change monitoring unit and outputs a control signal of optical power and optical wavelength of the corresponding optical transmission / reception device according to the monitoring signal; An optical power / wavelength control unit for receiving the control signal output from the optical characteristic monitoring / control unit and controlling the optical power and the optical wavelength of the corresponding optical transmission / reception device according to the control signal; And Receives the monitoring signal from the optical characteristic change monitoring unit and transmits the monitoring signal to the optical characteristic monitoring / control unit, and receives the control signal from the optical characteristic monitoring / control unit and transmits the monitoring / control signal to the optical power / wavelength control unit. part; Optical characteristics monitoring and control system of the optical transmission and reception apparatus in WDM-PON comprising a. The method of claim 1, And a cutting state detector for detecting an optical fiber cutting state of a link between each optical transmitting and receiving device of the OLT and the ONU. The method of claim 2, wherein the cutting state detection unit, The optical characteristic monitoring of the optical transmitting / receiving device in the WDM-PON, characterized in that the optical fiber received by the OLT optical transmitting and receiving device is compared with a set value and the uplink optical fiber is cut when the received optical power is below the set value. And control system. The method of claim 2, wherein the cutting state detection unit, In the WDM-PON, when the optical signal is transmitted from the OLT to each ONU, the optical signal reflected through the optical fiber is detected, and when the reflected optical signal is detected, the downlink optical fiber is determined to be in a truncated state. Optical characteristic monitoring and control system of optical transmitting and receiving device. The method of claim 1, wherein the monitoring / control signal transmission unit, In the WDM-PON of the optical transmitting and receiving device, characterized in that for transmitting the monitoring signal to the optical characteristic monitoring / control unit using a Simple Network Management Protocol (SNMP), and receiving the control signal from the optical characteristic monitoring / control unit. Optical property monitoring and control system. The optical characteristic change monitoring unit of claim 1, An optical characteristic monitoring and control system of an optical transmitting and receiving device in a WDM-PON, characterized in that it comprises a monitoring photodiode (monitoring PD). The optical characteristic change monitoring unit of claim 1, And a thermistor (thermistor) installed in the light source of each optical transmitting and receiving device. The optical characteristic monitoring and control system of the optical transmitting and receiving device in a WDM-PON. The method of claim 1, wherein the optical power / wavelength control unit, The optical characteristics monitoring and control system of the optical transmitting and receiving device in the WDM-PON characterized in that to control the optical power by changing the current input to the light source of each optical transmitting and receiving device, the optical wavelength by changing the temperature of the light source. The method of claim 1, Through the link between the OLT and each ONU, a monitoring signal for the optical power and the optical wavelength change for the optical transceiver within each ONU is transmitted to the OLT, and from the OLT for the optical power and optical wavelength of the optical transmitter / receiver. Optical characteristics monitoring and control system of the optical transmission and reception apparatus in WDM-PON, characterized in that the control signal is transmitted to each ONU. Light in a wavelength division multiplexing-based passive optical subscriber network (WDM-PON) including an optical fiber terminal device (OLT) and a plurality of optical subscriber station devices (ONU), each of which has an optical transmitting and receiving device for transmitting and receiving optical signals therebetween. In the optical characteristic monitoring and control method of the transceiver, An optical characteristic change monitoring step of monitoring an optical power and a temperature change of each optical transmitting and receiving device in the OLT and the plurality of ONUs; A monitoring signal transmission step of transmitting the monitored change in the optical characteristic change monitoring step to an optical characteristic monitoring / control unit located at a remote location through a trap of a simple network management protocol (SNMP); Collecting, by the optical characteristic monitoring / control unit, monitoring information transmitted through the trap using a get of SNMP; Control signal transmission step of generating a control signal of the optical power and optical wavelength of the corresponding optical transmission and reception apparatus according to the collected monitoring signal of the optical characteristic monitoring / control unit and transmits it through a set of Simple Network Management Protocol (SNMP) ; And An optical power / wavelength control step of receiving the transmitted control signal from an optical power / wavelength control unit of the optical transmitter / receiver and controlling the optical power and wavelength of the optical transmitter / receiver; Optical characteristics monitoring and control method of the optical transmission and reception apparatus in WDM-PON comprising a. The method of claim 10, And a cutting state detecting step of detecting a cutting state of an optical fiber of a link between each of the optical transmitting and receiving devices of the OLT and the ONU. The method of claim 11, wherein the cutting state detection step, Comparing the optical power received by the optical transmission and reception device of the OLT with a set value, and if the received optical power is less than or equal to the set value, it is determined that the uplink optical fiber is in the cutting state, WDM-PON Characteristic monitoring and control method. The method of claim 11, wherein the cutting state detection step, Detecting whether an optical signal is reflected through an optical fiber between the OLT and each ONU when the optical signal is transmitted from the OLT to each ONU; And Determining that the downlink optical fiber is in a cutting state when the reflected optical signal is detected; Optical characteristics monitoring and control method of the optical transmission and reception apparatus in WDM-PON comprising a. The method of claim 10, wherein the monitoring signal transmission step, The monitoring signal for the optical transmitting and receiving device in each ONU is transmitted to the OLT through a link between the OLT and each ONU, and then transmitted to the optical characteristic monitoring / control unit through the OLT, and for the optical transmitting and receiving device in each ONU. The control signal is transmitted to the OLT, and then transmitted from the OLT to each of the ONU via the link optical characteristics monitoring and control method of the optical transmission and reception apparatus in the WDM-PON.

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