KR20210025858A - Method and Apparatus for Transmitting Auxiliary Management and Control Channel - Google Patents

Abstract

Disclosed are a method and a device for transmitting a channel for management and control in long-distance and high-speed transmission of optical signals. An embodiment of the present invention, in controlling and managing a transceiver located at a remote location, provides detailed structure and operation characteristics of a composite optical transmitter, an AMCC transmitter capable of selecting an application location of AMCC transmission signals optimized for auxiliary management and control channel (AMCC) signal standards, and method thereof, with respect to the composite optical transmitter including a plurality of optical components.

Description

Auxiliary Channel Transmission Device and Method for Control Management {Method and Apparatus for Transmitting Auxiliary Management and Control Channel}

The present invention relates to a control management sub-channel transmission apparatus and method for controlling and managing another transceiver located in a remote location by a transceiver located in a specific location in a technology for long-distance high-speed transmission of optical signals.

The contents described below merely provide background information related to the present invention and do not constitute the prior art.

In the case of transmitting high-speed data (hereinafter referred to as "high-speed data") from a transceiver located in a specific location for management of a transceiver located in a remote location, a method for additionally transmitting control management information on the same transmission medium has already been proposed.

6 is a conceptual diagram for connection of a sub-channel for control management. The internal structure of a master transceiver and a slave transceiver including Auxiliary Management and Control Channel (AMCC) is the same. The master transceiver located at a specific location and the slave transceiver located at a remote location are connected with an optical cable, and exchange high-speed data signals and AMCC signals through the optical cable. Each transceiver includes an AMCC transmission unit that generates an AMCC transmission signal, an optical transmission driver that drives the optical transmission unit after combining the AMCC transmission signal and a high-speed data signal, an optical transmission unit that transmits an optical signal, an optical receiver that receives an optical signal, and a light receiver. Optical reception and recovery unit recovering high-speed data signals and AMCC reception signals received from the bride, AMCC reception unit processing AMCC reception signals, AMCC modem generating and scheduling AMCC transmission signals and AMCC reception signals, and microprocessor controlling AMCC modem It consists of (MCU). The optical signal output from the master transceiver includes a high-speed data signal and an AMCC transmission signal at the same time. The optical signal is transmitted to a slave transceiver located at a remote location through an optical fiber, and the optical receiving unit and the optical receiving and recovering unit of the slave transceiver receive the optical signal and restore a high-speed data signal and an AMCC signal. Likewise, the optical signal received from the slave transceiver is restored to a high-speed data signal and an AMCC reception signal while passing through the optical receiving unit and the optical receiving and recovering unit of the master transceiver.

7 is a conceptual diagram for conventional AMCC transmission. 7A is a conceptual diagram of a method of applying an AMCC transmission signal to an optical transmission unit of a direct modulation method, and has been presented in Patent Document 1, Patent Document 2, and Patent Document 3. Typically, a single chip semiconductor laser diode such as a Distributed FeedBack (DFB) laser diode or a Fabry Perot (FP) laser diode is used for the direct modulation type optical transmitter. The semiconductor laser diode is driven using a bias current for driving the semiconductor laser diode, an AMCC transmission signal, and an AMCC signal synthesizing unit for synthesizing a high-speed data signal to generate a desired optical signal.

FIG. 7(b) is a conceptual diagram of a method of applying an AMCC signal to an optical transmission unit of an indirect modulation method, and has been suggested in Patent Document 4. The bias current and AMCC transmission signal are applied to the laser diode through the AMCC signal synthesis unit, and the high-speed data signal is applied to an external modulator such as an ELector-Absorbing Modulator (EAM) or a Mach-Zehnder Modulator (MZM). It is authorized. The laser diode and the external modulator are opto-coupling in a monolithic integration method, or they are manufactured as separate chips and then optically coupled in a butt opto-coupling or lens optical coupling method.

In the conventional optical transmission unit shown in Figs. 7A and 7B, the AMCC signal is applied to the laser diode regardless of the detailed structure of the optical transmission unit. Therefore, in the case of a composite optical transmitter including a plurality of optical components in addition to a single laser diode (FP-LD or DFB-LD), an appropriate method for applying an optimal AMCC signal is required according to the structure and characteristics of the optical transmitter.

Patent Document 1: Korean Application No. 10-2006-7021303 (Out-of-band data communication between network transceivers, 2005.04.13, filed) Patent Document 2: US Patent No. US 110119231 B2 (Enhanced transmission and reception of remote digital diagnostic information of optical transceivers, 2017.08.08, registration) Patent Document 3: US Patent No.: US 11006361 B2 (Passive wavelength division multiplexing device for automatic wavelength locking and system thereof, 2015.08.11, registered) Patent Document 4: Chinese Patent No. CN 104980225 B (Optical module of in-band pass through monitoring signal based on amplitude modulation, 2017.10.03, registered)

In the present disclosure, in controlling and managing a transceiver located in a remote location, for a composite optical transmitter including a plurality of optical components, a detailed structure of the composite optical transmitter, operation characteristics, and an auxiliary channel for control management (Auxiliary Management and Control Channel: The main purpose is to provide an AMCC transmission apparatus and method capable of selecting an application location of an AMCC transmission signal optimized for AMCC) signal standards.

According to an embodiment of the present invention, in a transmission apparatus of an auxiliary management and control channel (AMCC) used for high-speed transmission of an optical signal, an optical signal combined with an AMCC transmission signal and high-speed data is transmitted. Composite optical transmitter; An AMCC receiver for estimating a reception quality of an AMCC received signal received from a remote location; A control unit for determining, based on the reception quality, one of the constituent elements included in the composite optical transmission unit as an application position to which the AMCC transmission signal is applied; An AMCC signal synthesizing unit for coupling the AMCC transmission signal to the determined application position; And an AMCC signal distribution unit connecting the AMCC transmission signal to the AMCC signal synthesizing unit.

In addition, according to another embodiment of the present invention, in the transmission method of an auxiliary management and control channel (AMCC) used for high-speed transmission of optical signals, the composite optical transmission unit combines the AMCC transmission signal and high-speed data. Transmitting the obtained optical signal: obtaining the optical signal from the composite optical transmission unit, a signal processing unit performing signal processing to extract the AMCC transmission signal; Generating data obtained by estimating the reception quality of the AMCC received signal by processing the AMCC received signal from a remote location by the AMCC receiver; Determining, by a controller, as an application position to which the AMCC transmission signal is applied, based on the data obtained by estimating the amplitude of the AMCC transmission signal and the reception quality; Connecting the AMCC transmission signal to the AMCC signal combining unit connected to the determined application position by hardware or software by an AMCC signal distribution unit; And combining the AMCC signal synthesizing unit with the high-speed data or bias current and the AMCC transmission signal and combining them to the determined application position.

As described above, according to the present embodiment, in controlling and managing a transceiver located at a remote location, for a composite optical transmitter including a plurality of optical components, a detailed structure of the composite optical transmitter, operation characteristics, and an auxiliary channel for control management (Auxiliary Management and Control Channel: AMCC) By providing an AMCC transmission device and method capable of selecting the application location of the AMCC transmission signal optimized for the signal standard,

First, according to the quality of the AMCC transmission signal, the optimal position to which the AMCC transmission signal is applied is automatically selected, thereby reducing the defect rate of the product during the production of optical transmission related products.

Second, by spatially separating the location where the high-speed data signal is applied and the location where the low-speed AMCC signal is applied, electrical or optical interference and crosstalk between these signals can be minimized.

Third, in network operation, when one composite optical transmitter supports multiple transmission rates, there is an effect that the optimal quality of the AMCC transmission signal is stably maintained.

1 is a conceptual diagram of a structure of a composite optical transmission unit.
2 is a conceptual diagram of an AMCC transmission apparatus for applying an AMCC transmission signal to a composite optical transmission unit according to an embodiment of the present invention.
3 is a conceptual diagram of an AMCC transmission apparatus for applying an AMCC transmission signal to a composite optical transmission unit according to another embodiment of the present invention.
4 is a flowchart of determining an optimum position for applying an AMCC transmission signal to a composite optical transmission unit according to an embodiment of the present invention.
5 is a flowchart of determining an optimum position for applying an AMCC transmission signal to a composite optical transmission unit according to another embodiment of the present invention.
6 is a conceptual diagram for connection of a sub-channel for control management.
7 is a conceptual diagram for conventional AMCC transmission.

Hereinafter, embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible, even if they are indicated on different drawings. In addition, in describing the embodiments, when it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the embodiments, the detailed description thereof will be omitted.

In addition, terms such as first, second, A, B, (a) and (b) may be used to describe the constituent elements of the present embodiments. These terms are for distinguishing the constituent element from other constituent elements, and the nature, order, or order of the constituent element is not limited by the term. Throughout the specification, when a certain part'includes' or'includes' a certain element, it means that other elements may be further included rather than excluding other elements unless otherwise stated. . In addition, the'... Terms such as'sub' and'module' mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

DETAILED DESCRIPTION OF THE INVENTION The detailed description to be disclosed below together with the accompanying drawings is intended to describe exemplary embodiments of the present invention, and is not intended to represent the only embodiments in which the present invention may be practiced.

Before describing an embodiment according to the present invention, a composite optical transmission unit that generates and transmits an optical signal will be described.

1 is a conceptual diagram of a structure of a composite optical transmission unit.

The composite light transmitting unit 110 shown in FIG. 1A includes a light source unit 111, a light modulator 112, a light amplification unit 113, a tap filter 114, and a part or all of the light detection unit 115. It consists of Here, the light source 111 generates a light source, the optical modulator 112 modulates the light source with high-speed data, and the optical amplification unit 113 amplifies the optical signal output from the optical modulator 112, and taps The filter 114 reflects a part of the optical signal output from the optical amplification unit 113 and transmits the rest, and the photodetector 115 serves to detect the optical signal reflected from the tap filter 114.

The light source unit 111 includes a laser diode, but may be implemented with a single laser diode or an external resonator using the laser diode as a gain material. The wavelength of the light source output from the light source 111 may be a fixed type or a variable wavelength type. The optical modulator 112 may include an ELector-Absorbing Modulator (EAM) or a Mach-Zehnder Modulator (MZM). The optical amplifier 113 includes a semiconductor optical amplifier (SOA). Between the light source unit 111, the light modulator 112, and the light amplification unit 113 of the composite light transmission unit 110, the optical coupling (opto-coupling) in a monolithic integration method, or a separate chip It can be optically coupled by butt opto-coupling or lens optical coupling after being manufactured.

The operation gain area of the semiconductor amplifier of the optical amplification unit 113 is determined by the optical coupling efficiency performance between the light source 111, the optical modulation unit 112, and the optical amplification unit 113 of the composite optical transmission unit 110. When the optical coupling efficiency is low, the intensity of the optical signal input to the semiconductor amplifier is reduced to operate in the linear gain region. When the optical coupling efficiency is high, the intensity of the optical signal input to the semiconductor amplifier is increased, and thus the intensity of the optical signal input to the semiconductor amplifier is increased. It works. When the semiconductor amplifier of the optical amplifier 113 operates in the saturation gain region, the optical transmission characteristic is deteriorated by causing a reduction in a low frequency signal and an optical output eye distortion due to a nonlinear response characteristic. However, it can be operated in a saturation gain region in order to increase the output optical power in a short transmission distance of 20 km or less and a wavelength band that does not have a large dispersion effect.

The photodetector 115 includes a photodiode. The reflectance of the tap filter 114 is determined based on the intensity of the optical signal output from the optical amplification unit 113 and the intensity of light that can be received by the photodetector 115. Typically, when the intensity of the optical signal output from the optical amplification unit is 0 dBm or more, and considering the responsivity of a general photodiode as 0.8, the reflectance of the tap filter 114 for stable optical signal detection is 1% or more. You need a value.

As shown in FIG. 1 (a), the optical signal processing sequence in the composite light transmission unit 110 includes a light source unit 111, an optical modulator 112, and an optical amplification unit 113. However, depending on the ease of implementation of the complex optical transmission unit and the required optical output conditions, light by the optical modulator 112 and the optical amplification unit 113 in the complex optical transmission unit 120 as shown in Fig. 1(b). The order of signal processing can be changed. The light source unit 111, the light modulator 112, and the light amplification unit 113 included in FIG. 1(b) have been described in the description of FIG. 1(a), so further detailed descriptions are omitted.

In describing an embodiment of the present invention, the structure of the composite optical transmission unit 110 shown in FIG. 1A is used, but is not limited thereto. In the structure of the composite optical transmitter 120 shown in FIG. 1B or a composite optical transmitter having another structure for generating and transmitting an optical signal, according to the present invention, which will be described below by changing appropriate hardware or software. It is possible to implement the embodiment.

2 is a conceptual diagram of an AMCC transmission apparatus 200 for applying an AMCC transmission signal to a composite optical transmission unit according to an embodiment of the present invention.

In this embodiment, the AMCC transmission apparatus 200 includes an AMCC signal application unit 210 for applying an AMCC signal to the composite optical transmission unit. The AMCC signal application unit 210 includes the signal processing unit 219, the AMCC receiving unit 218, the control unit 217, the AMCC signal distribution unit 216, and the first to third AMCC signal synthesis units 213, 214, and 215. Includes some or all.

The signal processing unit 219 according to the present embodiment receives the electrical signal output from the photodetector 115. The signal processing unit 219 generates an electric signal proportional to the output optical power of the composite optical transmission unit 110, and after applying a signal processing process such as noise filtering and electric signal amplification to the input electric signal, the control unit 217 To pass.

The AMCC receiver 218 according to the present embodiment receives the AMCC received signal input, calculates data on the reception quality of the AMCC signal, and transmits it to the control unit 217.

The control unit 217 according to the present embodiment determines whether the size of the AMCC transmission signal transmitted from the signal processing unit 219 satisfies the threshold range and the optimal AMCC transmission signal application position based on the data evaluated for the reception quality of the AMCC signal. It is determined and transmitted to the AMCC signal distribution unit 216. The process of determining the optimum application position by the control unit 217 will be described later with reference to FIG. 4. The control unit 217 may include a microprocessor (MCU). In addition, the reception quality of the AMCC signal may be whether an ACK (ACKnowledgement) for the AMCC transmission signal is confirmed within a predetermined time.

The AMCC signal distribution unit 216 according to this embodiment, Based on the operation state of each part of the composite optical transmission unit 110 The AMCC transmission signal is connected by hardware or software to an optimal application position among the components of the composite optical transmission unit 110 (the light source unit 111, the optical modulation unit 112, and the optical amplification unit 113). The AMCC signal distribution unit 216 includes electrical switches for performing connection with selected components of the composite optical transmission unit 110.

The first to third AMCC signal synthesizing units 213, 214, and 215 according to the present embodiment include a light source unit 111, an optical modulator 112, and an optical amplifying unit 113 constituting the complex light transmitting unit 110, respectively. It plays the role of applying the AMCC transmission signal to. The first AMCC signal synthesis unit 213 combines the first bias current 211 and the AMCC transmission signal, the second AMCC signal synthesis unit 214 combines the high-speed data signal and the AMCC transmission signal, and the third AMCC signal The synthesis unit 215 may combine the second bias current 212 and the AMCC transmission signal.

3 is a conceptual diagram of an AMCC transmission apparatus 300 for applying an AMCC transmission signal to a composite optical transmission unit according to another embodiment of the present invention.

In this embodiment, the AMCC transmission apparatus 300 includes an AMCC signal applying unit 310 for applying an AMCC signal to the composite optical transmission unit. The AMCC signal applying unit 310 is Part of the signal processing unit 219, the AMCC signal inspection unit 313, the AMCC receiving unit 218, the control unit 311, the AMCC signal distribution unit 216, and the first to third AMCC signal synthesis units 213, 214, 215 Or include all.

The signal processing unit 219 according to the present embodiment receives the electrical signal output from the photodetector 115. The signal processing unit 219 generates an electric signal proportional to the output optical power of the composite optical transmission unit 110, and after applying a signal processing process such as noise filtering and electric signal amplification to the input electric signal, the control unit 311 And it is transmitted to the AMCC signal inspection unit 313.

The AMCC signal monitoring unit 313 according to the present embodiment serves to monitor the quality of the AMCC transmission signal. The AMCC signal monitoring unit 313 calculates and transmits the data obtained by evaluating the quality of the AMCC transmission signal included in the currently output optical signal to the control unit 311. The AMCC signal monitoring unit 313 according to the present embodiment may include a limiting amplifier and a comparator to perform quality evaluation of an AMCC transmission signal.

The control unit 311 according to the present embodiment provides an optimal value based on the data obtained by evaluating whether the size of the AMCC transmission signal transmitted by the signal processing unit 219 satisfies the threshold range, the quality of the AMCC transmission signal or the reception quality of the AMCC signal. The AMCC transmission signal application position is determined and transmitted to the AMCC signal distribution unit 216. A process by which the control unit 311 determines the optimum application position will be described later with reference to FIG. 5. The control unit 311 may include a microprocessor. Here, the quality of the AMCC transmission signal may be a bit error rate (BER). Also, the reception quality of the AMCC signal may be whether an ACK (ACKnowledgement) for the AMCC transmission signal is confirmed within a predetermined time.

The AMCC receiving unit 218, the AMCC signal distribution unit 216, and the first to third AMCC signal synthesizing units 213, 214, and 215 according to the present embodiment have already been mentioned in the description of FIG. Detailed description is omitted.

The AMCC signal application unit 210 or 310 according to the present embodiment transmits the AMCC signal to the respective parts constituting the composite optical transmission unit 110 (the light source unit 111, the optical modulator 112, and the optical amplification unit 113). When is applied, a threshold value exists in the amplitude of the output AMCC transmission signal.

When the AMCC transmission signal is applied to the light source unit 111, if the amplitude of the AMCC transmission signal is increased too much, vibration of the wavelength due to oscillation and mode instability may be caused. Conversely, if the amplitude of the AMCC transmission signal is too reduced, it is difficult to ensure the quality of the AMCC transmission signal required for conversion to an optical signal.

When the AMCC transmission signal is applied to the optical modulator 112, if the amplitude of the AMCC transmission signal increases too much, interference with the high-speed data signal and crosstalk, and the extinction ratio of the optical output eye output from the modulator It may cause a change in the (extinction ratio), resulting in a decrease in reception sensitivity. Conversely, when the amplitude of the AMCC transmission signal is reduced, it is difficult to ensure the quality of the AMCC transmission signal required for conversion to an optical signal.

When the AMCC transmission signal is applied to the optical amplification unit 113, the required AMCC transmission signal size varies depending on whether the semiconductor amplifier of the optical amplification unit 113 is operated in a linear gain region or a saturation gain region. When operating in the linear gain region, there is no restriction on the size of the AMCC transmission signal. However, in the case of operating in the saturation gain region, there is an effect of attenuating the low-frequency signal due to the characteristics of the semiconductor amplifier. The amplitude of the transmitted signal must be increased. However, since an increase in the amplitude of the AMCC transmission signal causes an increase in power consumption without an increase in the optical output, there is a practical limitation on the increase in the amplitude of the AMCC transmission signal.

When the AMCC signal applying unit 210 or 310 according to the present embodiment applies the AMCC transmission signal, the AMCC transmission signal depends on the detailed structure of the light source unit 111 in the composite optical transmission unit 110, driving conditions, and output light power. Affects the determination of the optimal position to be applied.

As an embodiment of determining the optimal position, a case where the light source unit 111 is implemented as a Distributed FeedBack (DFB) laser diode or a Fabry Perot (FP) single laser diode will be described. When implementing the light source unit 111 using a single laser diode, when the semiconductor amplifier of the optical amplification unit 113 operates in the linear gain region, the AMCC transmission signal is applied to the optical amplification unit 113, and the light source unit is operated in the saturation gain region. Applying the AMCC transmission signal to (111) is advantageous in terms of power consumption and the quality of the AMCC transmission signal. The reason is that when the semiconductor amplifier of the optical amplifier 113 is driven in the saturation gain region, the amplitude of the AMCC transmission signal to be applied to the optical amplifier 113 must be large, so there is a problem of increasing power consumption. This is because if the AMCC transmission signal is applied to 112, electrical interference with the high-speed data signal may occur.

As another embodiment of the optimal positioning, a case where the detailed structure of the light source unit 111 includes an external resonator using a laser diode as a gain material will be described. In the implementation of the light source unit 111 including an external resonator, when the semiconductor amplifier of the optical amplification unit 113 operates in the linear gain region, the AMCC transmission signal is applied to the optical amplification unit 113, or when the semiconductor amplifier of the optical amplification unit 113 operates in the saturation gain region, the light Applying the AMCC transmission signal to the modulator 112 is advantageous in terms of power consumption and quality of the AMCC transmission signal. The reason is that, in the case of the external resonator structure, if the AMCC transmission signal is applied to the light source unit 111, output light wavelength and mode instability may occur, and it is required when the semiconductor amplifier of the optical amplification unit 113 is driven in the saturation gain region. This is because the amplitude of the transmitted AMCC signal must be large.

The optimal position where the AMCC transmission signal is applied to the composite optical transmitter 110 may be determined in advance by checking the characteristics of the composite optical transmitter 110, but the actual operating condition of the composite optical transmitter 110 cannot be properly reflected. can do. Accordingly, after confirming the transmission or reception quality of the AMCC signal, the optimum position to which the AMCC transmission signal is applied can be determined based on the confirmation result.

As an embodiment of determining the optimum position, the light coupling efficiency deviation between the light source unit 111, the light modulator 112, and the light amplification unit 113 constituting the composite light transmitting unit 110, and the light of the light source unit 111 The optimum application position of the AMCC transmission signal may be determined by reflecting the output power deviation, the SOA driving condition and characteristic deviation of the optical amplification unit 113, the driving condition deviation of the optical modulator 112, and the like. The AMCC transmission signal applying unit 210 or 310 according to the present embodiment monitors the quality of the AMCC transmission signal in real time through the light detection unit 115, the signal processing unit 312, and the AMCC signal monitoring unit 313, 110), it is possible to select the optimum application location of the AMCC transmission signal according to the output characteristics of the product, thereby improving product performance and reducing the defect rate in the production process.

As another embodiment for determining the optimal position, the optimal application position of the AMCC transmission signal in the master transceiver may be determined by checking the quality of the AMCC transmission signal of the master transceiver received from the slave transceiver. The AMCC signal transmitted from the master transceiver is received by the slave transceiver, and the slave transceiver checks the AMCC signal reception quality and informs the master transceiver. If the AMCC signal reception quality checked by the slave transceiver is poor, the master transceiver changes the application position of the AMCC transmission signal and transmits the AMCC signal to the slave transceiver. The AMCC signal applying unit 210 or 310 according to the present embodiment may determine the optimum application position of the AMCC transmission signal in the composite optical transmission unit 110 by using a series of AMCC communications as described above.

4 is a flowchart of determining an optimum position for applying an AMCC transmission signal to a composite optical transmission unit according to an embodiment of the present invention.

4 is a flow chart related to an embodiment of the present invention shown in FIG. The AMCC transmission signal application process shown in the flowchart of FIG. 4 is performed by the control unit 217 in the AMCC signal application unit 210. Here, the application process includes inputting the AMCC transmission signal to the optical amplification unit 113, the light source unit 111, or the optical modulation unit 112, confirming whether the threshold of the AMCC transmission signal amplitude is satisfied, and the AMCC of the slave transceiver. And checking whether the signal reception quality is good.

First, an AMCC transmission signal is input to the optical amplification unit 113 (S401). Next, it is checked whether the amplitude of the AMCC transmission signal detected by the photodetector 115 is less than or equal to the threshold (S402). Next, when the amplitude of the AMCC transmission signal satisfies the threshold value, the AMCC signal reception quality of the slave transceiver is checked (S403). If it is determined that the AMCC signal reception quality is good, the AMCC transmission signal is fixed to be input to the optical amplification unit 113 to perform AMCC transmission and reception between the master transceiver and the slave transceiver. If the AMCC reception quality is poor, the above process is repeated by increasing the AMCC transmission signal amplitude, but the preset AMCC transmission signal amplitude is less than or equal to the threshold (S404). In addition, when the amplitude of the AMCC transmission signal exceeds the threshold (S402), the AMCC transmission signal application position is changed from the optical amplification unit 113 to the light source unit 111, and the above-described process is performed in the same manner (S405 to S408).

If the amplitude of the AMCC transmission signal exceeds the threshold value in the light source 111 as well (S406), the above-described process is performed in the same manner by changing the AMCC transmission signal application position from the light source 111 to the optical modulator 112 ( S409 to S412). If the amplitude of the AMCC transmission signal exceeds the threshold value even in the optical modulator 111 (S410), the AMCC transmission signal quality defect status is reported to the system using the transceiver through the control unit 217 (S413).

When the AMCC transmission/reception between the master transceiver and the slave transceiver is satisfactory, the quality of a real-time AMCC signal received signal is monitored inside each transceiver and reported to the control unit 217. When AMCC signal reception quality deteriorates, stable AMCC transmission/reception is performed by adjusting the AMCC transmission signal amplitude within a range less than or equal to the threshold of the AMCC transmission signal amplitude to output an AMCC transmission signal of constant quality.

5 is a flowchart of determining an optimum position for applying an AMCC transmission signal to a composite optical transmission unit according to another embodiment of the present invention.

5 is a flow chart related to another embodiment of the present invention shown in FIG. The AMCC transmission signal application process shown in the flowchart of FIG. 5 is performed by the control unit 311 in the AMCC signal application unit 310. Here, the application process is a step of inputting the AMCC transmission signal to the optical amplification unit 113, the light source unit 111, or the optical modulator 112, whether the threshold of the AMCC transmission signal amplitude is satisfied, and the AMCC signal monitoring unit 313 And checking whether the quality of the transmission signal is good, and checking whether the AMCC signal reception quality of the slave transceiver is good.

First, an AMCC transmission signal is input to the optical amplification unit 113 (S501). Next, it is checked whether the amplitude of the AMCC transmission signal detected by the photodetector 115 is less than or equal to the threshold value, and the AMCC transmission signal quality is checked by the AMCC signal monitoring unit 313 (S502). Next, if the amplitude of the AMCC transmission signal satisfies the threshold and the quality of the AMCC transmission signal is good, the AMCC signal reception quality of the slave transceiver is checked (S503). If it is determined that the AMCC reception quality is good, the AMCC transmission signal is fixed to be input to the optical amplification unit 113 to perform AMCC transmission and reception between the master transceiver and the slave transceiver. If the AMCC signal reception quality is poor, the above process is repeated by increasing the AMCC transmission signal amplitude, but the preset AMCC transmission signal amplitude is less than or equal to the threshold value (S504). In addition, when the AMCC transmission signal amplitude is less than or equal to the threshold value, when the AMCC transmission signal quality is detected or the AMCC transmission signal amplitude exceeds the threshold value (S502), the AMCC transmission signal application position is moved from the optical amplification unit 113 to the light source unit. By changing to (111), the above-described process is performed in the same manner (S505 to S508).

If, in the light source unit 111, the AMCC transmission signal amplitude is less than or equal to the threshold value, and the AMCC transmission signal quality is detected or the AMCC transmission signal amplitude exceeds the threshold value (S506), the AMCC transmission signal is applied to the light source unit 111 ) To the optical modulator 112 to perform the same process as described above (S509 to S512). If, in the optical modulator 112, the AMCC transmission signal amplitude is less than or equal to the threshold value, the AMCC transmission signal quality is detected, or the AMCC transmission signal amplitude exceeds the threshold value (S510), the transceiver through the control unit 311 The AMCC transmission signal quality defect status is reported to the system using (S513).

When the AMCC transmission/reception between the master transceiver and the slave transceiver is good, the AMCC signal monitoring unit inside each transceiver monitors the real-time AMCC transmission signal quality and reports it to the control unit 311. When the AMCC transmission signal quality deteriorates, stable AMCC transmission and reception is performed by adjusting the AMCC transmission signal amplitude within a range less than or equal to the threshold of the AMCC transmission signal amplitude to output an AMCC transmission signal of constant quality.

4 and 5, the control unit 217 or 311 according to the present embodiment is for applying the AMCC transmission signal in the order of the optical amplification unit 113, the light source unit 111, and the optical modulator 112. Although an attempt is made to select an optimal application location, it is not necessarily limited thereto. The order illustrated in FIGS. 4 and 5 is an example determined in consideration of the operating characteristics of each component included in the composite optical transmitter 110 and optical coupling efficiency between components, and thus the actual composite optical transmitter 110 and When implementing and verifying the AMCC transmission apparatuses 200 and 300, it is possible to select an optimal application position in a different order than those shown in FIGS. 4 and 5.

As described above, according to the present embodiment, in controlling and managing a transceiver located at a remote location, for a composite optical transmitter including a plurality of optical components, a detailed structure of the composite optical transmitter, operation characteristics, and an auxiliary channel for control management By providing an AMCC transmission apparatus and method capable of selecting the application position of the AMCC transmission signal optimized for the signal standard,

First, according to the quality of the AMCC transmission signal, the optimal position to which the AMCC transmission signal is applied is automatically selected, thereby reducing the defect rate of the product when producing optical transmission related products.

Second, by spatially separating the location where the high-speed data signal is applied and the location where the low-speed AMCC signal is applied, electrical or optical interference and crosstalk between these signals can be minimized.

Third, there is an effect that the optimal quality of the AMCC transmission signal is stably maintained when multiple transmission speeds are supported by one composite optical transmission unit during network operation. The reason is that in the case of a fixed data transmission rate, a relatively stable AMCC transmission signal application position is likely to be determined, but in the case of a multiple transmission rate, the amplitude ratio of the AMCC transmission signal changes according to the data rate, and thus the optimal AMCC transmission signal. This is because the location of the application may be different.

Each flow chart according to the present embodiment describes that each process is sequentially executed, but is not limited thereto. In other words, since it may be applicable to change and execute the processes described in the flow chart or execute one or more processes in parallel, the flow chart is not limited to a time series order.

Some or all of the technical process of this embodiment described above is implemented as a computer program, and can be read using software of a computer, a nonvolatile or non-transitory recording medium (CD-ROM, ROM, memory card, hard disk, Magneto-optical disks, storage devices, etc.).

The above description is merely illustrative of the technical idea of the present embodiment, and those of ordinary skill in the technical field to which the present embodiment pertains will be able to make various modifications and variations without departing from the essential characteristics of the present embodiment. Accordingly, the present embodiments are not intended to limit the technical idea of the present embodiment, but to explain the technical idea, and the scope of the technical idea of the present embodiment is not limited by these embodiments. The scope of protection of this embodiment should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present embodiment.

The AMCC transmission device according to the present embodiment provides an input method of various AMCC transmission signals to a composite optical transmission unit composed of a light source unit, an optical modulator and an optical amplification unit, and is an optimal choice for simultaneously transmitting high-speed data and AMCC transmission signals. To be able to do it. In addition, as the proposed AMCC transmission device exceeds the limitations of the existing technology, in addition to the use by the related technology field, the market or business possibility of the device to be applied in the future is sufficient, and it is a technology that can be implemented clearly in reality. It is an invention with high availability.

110, 120: composite light transmitting unit 111: light source unit
112: optical modulation unit 113: optical amplification unit
200, 300: AMCC transmitter 210, 310: AMCC signal application unit

Claims (14)

In the transmission apparatus of an auxiliary management and control channel (AMCC) used for high-speed transmission of optical signals,
A composite optical transmitter for transmitting an optical signal in which the AMCC transmission signal and high-speed data are combined;
An AMCC receiver for estimating a reception quality of an AMCC received signal received from a remote location;
A control unit for determining, based on the reception quality, one of the constituent elements included in the composite optical transmission unit as an application position to which the AMCC transmission signal is applied;
An AMCC signal synthesizing unit for coupling the AMCC transmission signal to the determined application position; And
AMCC signal distribution unit connecting the AMCC transmission signal to the AMCC signal synthesis unit
AMCC transmission device comprising a. The method of claim 1,
The composite optical transmission unit,
A light source unit generating a light source;
An optical modulator for generating an optical signal modulated by the high-speed data by the light source;
An optical amplifier amplifying the optical signal;
A tap filter reflecting a portion of the optical signal; And
Photo detector for detecting the optical signal reflected from the tap filter
Including,
And coupling the AMCC transmission signal to one of the light source unit, the optical modulation unit, and the optical amplification unit. The method of claim 1,
The AMCC receiver,
And transmitting the data obtained by processing the AMCC received signal to estimate the reception quality of the AMCC received signal to the control unit. The method of claim 1,
A signal processing unit for extracting an AMCC transmission signal by signal processing the optical signal obtained from the composite optical transmission unit, wherein the control unit estimates the amplitude of the AMCC transmission signal extracted by the signal processing unit and the reception quality. , One of the optical amplification unit, the light source unit, and the optical modulation unit included in the composite optical transmission unit is determined as an application position to which the AMCC transmission signal is applied and transmitted to the AMCC signal distribution unit. AMCC transmission device, characterized in that. The method of claim 1,
The AMCC signal distribution unit,
And connecting the AMCC transmission signal to the AMCC signal synthesizing unit in hardware or software so that the AMCC signal synthesizing unit can apply the AMCC transmission signal to the determined application position. The method of claim 4,
The AMCC signal synthesis unit,
Based on the connection by the AMCC signal distribution unit, a first bias current and the AMCC transmission signal are combined and applied to the light source unit, or a high-speed data signal and the AMCC transmission signal are combined and applied to the optical modulator, or 2 An AMCC transmission device, characterized in that the bias current and the AMCC transmission signal are combined and applied to the optical amplifier. The method of claim 4,
The control unit,
In order to determine the application position, input the AMCC transmission signal to the optical amplification unit, the light source unit, or the optical modulation unit, check whether the threshold value of the AMCC transmission signal amplitude is satisfied, and whether the reception quality of the AMCC received signal is good. And adjusting the amplitude of the AMCC transmission signal within a preset threshold range. The method of claim 4,
Further comprising an AMCC signal monitoring unit for monitoring the quality of the AMCC transmission signal, wherein the AMCC signal monitoring unit processes the AMCC transmission signal extracted by the signal processing unit to signal the estimated quality of the AMCC transmission signal to the control unit. AMCC transmission device, characterized in that the transmission. The method of claim 8,
The control unit,
Based on the amplitude of the AMCC transmission signal, the quality of the AMCC transmission signal, and the data obtained by estimating the reception quality, one of an optical amplification unit, a light source unit, and an optical modulation unit included in the composite optical transmission unit, wherein the AMCC transmission signal is Determines the applied position to be applied and transmits it to the AMCC signal distribution unit. AMCC transmission device, characterized in that. The method of claim 9,
The control unit,
In order to determine the application position, the AMCC transmission signal is input to the optical amplification unit, the light source unit, or the optical modulation unit, and whether the threshold of the AMCC transmission signal amplitude is satisfied and the quality of the AMCC transmission signal transmitted from the AMCC signal monitoring unit. The AMCC transmission device, characterized in that it checks whether or not is good, checks whether the reception quality of the AMCC received signal is good, and adjusts the amplitude of the AMCC transmission signal within a preset threshold range. In the transmission method of an auxiliary management and control channel (AMCC) used for high-speed transmission of optical signals,
Process of the composite optical transmitter transmitting an optical signal in which the AMCC transmission signal and high-speed data are combined:
Acquiring the optical signal from the composite optical transmitter and performing signal processing by a signal processor to extract an AMCC transmission signal;
Generating data obtained by estimating the reception quality of the AMCC received signal by processing the AMCC received signal from a remote location by the AMCC receiver;
Determining, by a controller, as an application position to which the AMCC transmission signal is applied, based on the data obtained by estimating the amplitude of the AMCC transmission signal and the reception quality;
Connecting the AMCC transmission signal to the AMCC signal combining unit connected to the determined application position by hardware or software by an AMCC signal distribution unit; And
The process of combining the AMCC signal synthesizing unit with the high-speed data or bias current and the AMCC transmission signal to the determined application position
AMCC transmission method comprising a. The method of claim 11.
The determining process,
Inputting the AMCC transmission signal to an optical amplification unit, a light source unit, or an optical modulation unit included in the composite optical transmission unit;
Checking whether a threshold value of the amplitude of the AMCC transmission signal is satisfied;
Checking whether the reception quality of the AMCC received signal is good; And
Adjusting the amplitude of the AMCC transmission signal within a preset threshold range
AMCC transmission method comprising a. The method of claim 11,
Signal processing the AMCC transmission signal extracted by the signal processing unit, and generating data obtained by estimating the quality of the AMCC transmission signal by the AMCC signal monitoring unit; And
Based on the amplitude of the AMCC transmission signal, the quality of the AMCC transmission signal, and the data obtained by estimating the reception quality, the control unit transfers one of the components included in the composite optical transmission unit to an application position to which the AMCC transmission signal is applied. Decision process
AMCC transmission method further comprising a. The method of claim 13.
The determining process,
Inputting the AMCC transmission signal to an optical amplification unit, a light source unit, or an optical modulation unit included in the composite optical transmission unit;
Checking whether a threshold value of the amplitude of the AMCC transmission signal is satisfied and whether the quality of the AMCC transmission signal transmitted from the AMCC signal monitoring unit is satisfactory;
Checking whether the reception quality of the AMCC received signal is good; And
Adjusting the amplitude of the AMCC transmission signal within a preset threshold range
AMCC transmission method comprising a.

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