KR100277712B1 - Overhead Storage of Fiber Channel Section Layer in Optical Transmission System - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to an overhead storage device of a fiber channel section layer in an optical transmission system.

2. The problem to be solved by the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide an overhead storage device capable of effectively performing an operation and maintenance function of a fiber channel section layer by accommodating maintenance monitoring and other functions of the own station and a counterpart station in the overhead for monitoring control of the fiber channel section layer. have.

3. Summary of Solution to Invention

The present invention includes: demultiplexing means for demultiplexing a surveillance channel signal input from the outside; And status monitoring information, section tracking information, serial connection monitoring information, optical channel wavelength assignment information, BIP value, signal level information, optical quality value, monitoring channel alarm detection information, and automatic switching exchange information transmitted from the demultiplexing means, respectively. First to ninth storage means for storage.

4. Important uses of the invention

The present invention is used in a multi-channel wavelength division optical transmission system.

Description

Overhead Storage of Fiber Channel Section Layer in Optical Transmission System

The present invention relates to an overhead storage device for supervisory control of an optical channel (OCH) layer layer in a multi-channel wavelength division multiplexing (WDM) optical transmission system.

In general, the functions that can be considered when implementing the supervisory control function in the fiber channel section layer are maintenance monitoring function of own station and counterpart station (remote), line fault monitoring function, signal quality monitoring function, connectivity monitoring function, channel capacity monitoring function, data Communication channel function, orderwire function, etc. are required.

The maintenance monitoring function of the own station and the counter station (remote) includes loss of optical signal (LOS) and loss of optical supervisory (LOS_SV) that can be detected from the main optical signal and the monitoring channel signal in the system. This function informs the next station (i.e., node) in the opposite direction in the opposite direction or the progress direction of failure detection such as signal and LOF (loss of supervisory frame). It can be suppressed and it can also help to detect the location of the disorder, so that it can cope effectively with the disorder.

The line fault monitoring function is a function that can suppress the occurrence of an alarm by informing the fact that such information is disturbed to the next station because an alarm can be generated in all repeaters when a repeater or a relay line failure occurs. This feature can use this information to block optical signals for fault location detection or operator protection.

The signal quality monitoring function is a function necessary for detecting and informing a signal because a line or an element is not in an error state but its characteristics are deteriorated and thus a transmission performance of a main optical signal or a monitoring channel signal may be reduced.

The connectivity monitoring function checks whether a transmitting station to which a signal is to be transmitted and a receiving station to be received match with each other, which detects an incorrect path if not received and informs the other station of an incorrect path. This prevents the reception of unwanted signals.

The channel capacity monitoring function is a function for effectively managing maintenance information that may vary depending on the number of channels by recognizing the number of multiplexed optical channels mounted in the optical multiple section.

The data communication channel function is a function necessary for exchanging maintenance information between systems and data necessary for network management.

The short circuit function is a function required for voice communication between system operators.

However, in the conventional case (for example, US Patent 5500756, etc.) for realizing the supervisory control function in the fiber channel section layer, only a very basic function such as a maintenance function, a data communication channel, and a short-circuit line function are used. There is a problem that can not effectively perform the monitoring control because there is no way to suppress the alarm that can occur in multiple cases or to inform the fact that the alarm occurs.

Accordingly, the present invention has been made to solve the above problems, in the monitoring of the optical channel interval layer in a multi-channel wavelength division multiple optical transmission system, the maintenance monitoring function of the host and the counterpart station (remote), the serial connection monitoring function, the signal Operation of the optical channel section layer of a terminal or repeater by accommodating all of the quality monitoring function, the optical channel wavelength assignment monitoring function, and the data communication channel (DCC: data communication channel) function in the overhead for monitoring and control of the optical channel section layer. And an overhead storage device capable of effectively performing a maintenance function.

1 is a block diagram of a wavelength multiplexed optical transmission system to which the present invention is applied.

FIG. 2 is a diagram illustrating a configuration of a fiber channel section layer of the WDM system of FIG. 1. FIG.

3 is a configuration diagram of an overhead storage device of an optical channel section layer in an optical transmission system according to the present invention.

4 is a configuration diagram of another embodiment of an overhead storage device of an optical channel section layer in an optical transmission system according to the present invention;

5 is a diagram illustrating an embodiment of an overhead for monitoring control of a fiber channel section layer according to the present invention;

6 is a detailed structural diagram of an overhead byte applied to the present invention.

FIG. 7 is an explanatory diagram of faults 1 and 2 of the optical signal alert detection byte and the status information monitoring byte defined in FIG. 6; FIG.

FIG. 8 is an explanatory diagram of faults 3 and 4 of the optical signal alert detection byte and the status information monitoring byte defined in FIG. 6; FIG.

FIG. 9 is an explanatory diagram of a failure 5 between the optical signal alert detection byte and the status information monitoring byte defined in FIG. 6; FIG.

10 is an exemplary application diagram of a reception optical channel BIP, an optical channel OBIP byte, an optical quality value byte, and an optical channel interval tracking byte defined in FIG. 6;

FIG. 11 is an exemplary application diagram of a fiber channel wavelength allocation byte, a signal level byte, and an APS byte defined in FIG. 6; FIG.

Explanation of symbols on the main parts of the drawings

340: multiplexer 350: demultiplexer

341 to 349 and 351 to 359: registers

The present invention for achieving the above object, in the overhead storage device of the optical channel section layer in the optical transmission system, by demultiplexing the monitoring channel signal input from the outside, status monitoring information, section tracking information, serial connection Demultiplexing means for outputting monitoring information, optical channel wavelength allocation information, bit interleaved parity (BIP) values, signal level information, optical quality values, monitoring channel alarm detection information, and automatic protection switching information; First storage means for temporarily storing the state monitoring information; Second storage means for temporarily storing the section tracking information; Third storage means for temporarily storing the serial connection monitoring information; Fourth storage means for temporarily storing the optical channel wavelength assignment information; Fifth storage means for temporarily storing the BIP value; Sixth storage means for temporarily storing the signal level information; Seventh storage means for temporarily storing the light quality value; Eighth storage means for temporarily storing the monitoring channel alert detection information; And ninth storage means for temporarily storing the automatic transfer exchange information.

In addition, the present invention provides an overhead storage device of an optical channel section layer in an optical transmission system, comprising: first storage means for temporarily storing state monitoring information input from the outside; Second storage means for temporarily storing interval tracking information input from the outside; Third storage means for temporarily storing the serial connection monitoring information input from the outside; Fourth storage means for temporarily storing the optical channel wavelength assignment information input from the outside; Fifth storage means for temporarily storing a bit interleaved parity (BIP) value input from the outside; Sixth storage means for temporarily storing signal level information input from the outside; Seventh storage means for temporarily storing the light quality value input from the outside; Eighth storage means for temporarily storing the monitoring channel alarm detection information input from the outside; Ninth storage means for temporarily storing Automatic Protection Switching information input from the outside; And the state monitoring information, the section tracking information, the serial connection monitoring information, the optical channel wavelength allocation information, the BIP value, the signal level information, the optical quality value, the monitoring channel alarm detection information, and the automatic transfer switching information. Multiplexing means for multiplexing and outputting.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a configuration diagram of a wavelength multiplexed optical transmission system to which the present invention is applied, and is composed of a single station type WDM system 1 and a repeater type WDM system 2.

Here, the single station type WDM system 1 includes an optical transmission section layer 11, an optical multiple section layer 12, and an optical channel section layer 13.

Meanwhile, the repeater type WDM system 21 includes only the optical transmission interval layer 21 as a 1-R repeater.

The signal transmitted from the repeater-type WDM system 2 is transmitted to point-to-point by receiving it from the end-station WDM system 1, and the dependent signals inputted into the fiber channel section are transmitted after being multiplexed and received. The optical signal is demultiplexed and then the dependent signal is extracted.

FIG. 2 is a configuration diagram of an optical channel section layer of the single-station WDM system of FIG. 1. When divided into a transmitting end and a receiving end, an optical channel section control unit for generating and analyzing a monitoring channel overhead to monitor and control the optical channel section layer ( 20) and an automatic protection switching unit 22 for automatic protection switching (APS) processing.

The transmitter comprises a region diode 31, an optical channel modulator 32, an optical channel framer 33, a monitoring channel overhead storage 34, and a modulator 39.

The receiving end comprises a monitoring channel overhead storage 34, an optical channel deframer 36, an optical channel demodulator 37 and a photodetector 38.

The operation of the fiber channel section layer of the single station type WDM system of FIG. 1 having such a structure will be described in detail as follows.

The main processor for processing the monitoring control overhead of the OCH layer is referred to as the optical channel section control unit 20, and the monitoring control overhead of the OCH layer includes an overhead for receiving information about each overhead from the optical channel section control section 20. It is generated by using the property of the dependent signal and stored in the monitoring channel overhead storage unit 34 aligned with the frame.

The optical channel framer 33 applies the frame byte generated by the frame algorithm to the signal output from the monitoring channel overhead storage unit 34 to frame the optical channel overhead and transfers the optical channel framer to the optical channel modulator 32.

The transmission of the monitoring and control overhead of the OCH layer modulates the signal of the various OCH overheads by applying the analog direct modulation method to the optical power and transmits the signal to the optical power.

The optical channel framer 33 frames various overheads and transmits them to the optical channel modulator 32, which is modulated by the driving current of the laser diode 31 and applied to the output optical signal, and the optical signal is transmitted to the data. (I.e., the original dependent signal) is used as a light source of the modulator 39 for converting the optical signal into an optical signal.

In order to receive the monitoring control overhead of the optical channel layer, the optical signal is converted into an electrical signal through the photodetector 38. Since the optical channel overhead signal is modulated and applied to the original subordinate signal, this signal is used. As described above, only the optical channel overhead signal is separated and extracted by the optical channel demodulator 37 using the analog direct modulation method, and transferred to the optical channel deframer 36.

The fiber channel deframer 36 finds a synchronization by performing a frame byte, extracts the overhead arranged in the frame, transfers the data to the monitoring channel overhead storage unit 34, and stores the same. .

The optical channel deframer 36 basically detects the optical channel section signal loss (OCH-SV-LOS) and the frame synchronization loss (OCH-SV-LOF) for monitoring the optical channel section signal.

3 is a configuration diagram of an overhead storage device of an optical channel section layer in an optical transmission system according to the present invention.

As shown in FIG. 3, the overhead storage device according to an embodiment of the present invention includes a multiplexer 340 for multiplexing respective pieces of information transmitted, state monitoring information transmitted from the optical channel section controller 20, Multiplexing unit temporarily stores interval tracking information, serial connection monitoring information, optical channel wavelength allocation information, bit interleaved parity (BIP) value, signal level information, optical quality value, monitoring channel alarm detection information and automatic protection exchange (APS) information Registers 341 to 349 to 340.

The status monitoring information register 341 includes a byte (i.e., REI (remote error indication) byte (3 bits)) for transmitting it to the power when a BIP-8 error occurs, and a bit (i.e., for notifying the power state of a wavelength length mismatching state). Stores temporarily the WV-MIS (Wavelength-Mismatch) (1 bit) and a bit for informing the power station of the TID mismatching state.

The section tracking information register 342 follows the ITU Recommendation E.161 as a register for tracking the OCH signal at the end of the OCH signal by numbering each OCH signal in order to have a section tracking function for the OCH signal.

The Tandem Connection Monitoring Information Register 343 is used when the OCH signal is multiplexed and transmitted to the optical / electric conversion and all / optical conversion in order to compensate for the optical power attenuation due to the optical signal characteristics during transmission. To monitor the error performance that occurs, regenerates the OCH signal and transmits it after calculation. Here, this byte is in accordance with ITU Recommendation G.783.

In the optical channel wavelength assignment information register 344, since the byte is given a wavelength for each subordinate signal according to the wavelength allocation by the WDM method, it must be received by the other station at the same wavelength.

Therefore, it transmits it to the transmission fiber channel section overhead, interprets the same wave signal in the reception fiber channel section overhead storage unit, and if it is wrong, informs it via the information stored in the status monitoring information register 341.

The BIP value register 345 is for monitoring the performance of the fiber channel section signal. The BIP value register 345 is a register for inserting a BIP-8 calculation including up to frame bytes for the fiber channel overhead.

The overhead storage unit stores the error generated by comparing the BIP-8 value transmitted through the optical channel section and the BIP-8 value generated by parity calculation of the received optical channel section signal. To pass.

In addition, the register for monitoring the performance of the dependent signal is called the OBIP-8 register. This register converts the input optical signal into an electrical signal to generate a BIP-8 calculation value and inserts it.

The signal level information register 346 indicates characteristics of the dependent signal and contains attributes such as signal format, speed, and asynchronous transfer mode.

In addition, when the dependent signal is not connected to perform the function of displaying it as unequipped (unequipped).

The optical quality value register 347 transmits the value of the optical power output from the optical channel section layer that receives the dependent signal and changes it to the assigned wavelength.

In addition, the receiving and terminating the dependent signal has a function of monitoring the performance of the optical power by comparing the value of the received optical power and the transmission optical power transmitted through the optical channel section overhead.

In addition, it has a function of transmitting an optical signal measured by receiving an optical signal using Far End (FE) bytes of optical quality.

The monitoring channel alarm detection information register 348 includes an optical channel optical signal loss (OCH-SV LOS) and a frame loss signal (OCH-SV LOF), an optical loss signal (LOS) of a dependent signal, and an upper layer (OTS, OMS layer). Disturb signals to the power station.

The APS information register 349 applies an APS (Automatic Protection Switching) scheme to automatically handle the protection applied to the dependent signal. This function is identical to the APS operation in use in synchronous transmission networks and its operation follows those recommended in G.783 and G.841.

The overhead bytes are configured by the control of the fiber channel section control unit 20 based on the state and property of the dependent signal, and the state monitoring information register 341 based on information detected in the received OCH signal for maintenance of the OCH layer. And through the monitoring channel alert detection information register 348.

4 is a configuration diagram of another embodiment of an overhead storage device of an optical channel section layer in an optical transmission system according to the present invention;

As shown in FIG. 4, the overhead storage device according to another embodiment of the present invention includes a demultiplexer for demultiplexing a supervisory channel signal transmitted from the optical channel deframer 36 to separate the supervisory channel overhead. 350 and state monitoring information, section tracking information, serial connection monitoring information, optical channel wavelength assignment information, BIP value, signal level information, optical quality value, monitoring channel alarm detection information and automatic transmitted from the demultiplexer 350; And registers 351 to 359 which temporarily store the transfer exchange (APS) information and transfer them to the multiplexer 340, respectively.

The state monitoring information register 351 stores monitoring information for accumulating the REI byte (which is 3 bits) and sending it from the local station.

The section tracking information register 352 has a function of retrieving the received section tracking byte and tracking it later on when a failure occurs on the signal path.

The serial connection monitoring information register 353 transmits an error to the next station when an error occurs in the OBIP (Optical Bit Interleaved Parity) -8 when the OCH signal is reproduced and relayed to the next station. By comparing the error occurred in the serial section with the error, the number of OBIP-8 errors actually generated is accumulated and used as performance data.

The optical channel wavelength assignment information register 354 transmits the received optical wavelength assignment value to the power station of the status monitoring information register 351 when the received optical wavelength assignment value is different from the value possessed by the own station (that is, the wavelength value to be received).

The BIP value register 355 compares the BIP-8 value in the received optical channel overhead with the received BIP-8 value by parity calculation and transmits an error generated by using the REI byte to the station. . This is cumulatively processed by the performance of the optical channel section.

The signal level information register 356 recognizes this as an alarm when the signal level information register 356 is different from the received signal level information and its own value (that is, the signal level value to be received).

The optical quality value register 357 extracts a performance value for the path of the OCH dependent signal by comparing the measured optical power of the received OCH dependent signal with the received optical quality value. This can detect a degradation in the path of the OCH signal.

The supervisory channel alarm detection information register 358 includes optical signal loss (OCH-SV LOS) and frame loss (OCH-SV LOF), optical loss (LOS) of dependent signals, and upper layers (OTS and OMS layers) in the optical channel section. When receiving a signal generated due to a failure of the judge it is a failure.

The OAPS information register 359 applies an Automatic Protection Switching (APS) scheme to automatically process the protection applied to the dependent signal. This function is identical to the APS operation in use in synchronous transmission networks and its operation follows those recommended in G.783 and G.841.

The overhead bytes are configured by the control of the optical channel section control unit 20 based on the state and property of the dependent signal, and the state monitoring information register based on the information detected in the received OCH signal for the maintenance of the OCH layer. 351 and the watch channel alert detection information register 358.

FIG. 5 is a structural diagram of an overhead for monitoring control of an optical channel section layer according to an embodiment of the present invention, including frame information byte, APS K1 byte, APS K2 byte, status monitoring information byte, section tracking information byte, optical quality value byte, It consists of optical quality value station byte, BIP-8 byte, OBI-8 byte, monitoring channel alarm detection information byte, signal level information byte, serial connection monitoring information byte, optical channel wavelength allocation information byte and reservation byte.

The frame information byte is a byte for detecting the position of the byte.

The optical signal alarm detection information byte, the status monitoring information byte, and the monitoring channel alarm detection information byte are bytes for performing a maintenance monitoring function of the main optical signal and the monitoring channel signal.

The interval tracking information byte is a byte for performing a connectivity monitoring function.

The light quality value byte and the BIP value byte are bytes for performing a signal quality monitoring function.

6 is a detailed structural diagram of an overhead byte applied to the present invention, in which a monitoring byte with a supervisory control signal for an optical channel is inserted into a corresponding bit and inserted and transmitted, and the receiver ignores when the supervisory control signal for the corresponding optical channel is not installed. .

The BIP value byte stores the BIP value calculated when transmitting and the BIP value calculated by the other station when receiving.

The light signal alert detection information byte indicates the normal state of the main light signal, the OCH-FDI and OCH-BDI states.

Status monitoring information byte indicates the status of counterpart status (OCH-LOS, OCH-LOS-SV, OCH-FDI, OCH-LOF, malfunction status) and interval tracking remote reporting (normal status, interval tracking mismatch status). To be recognized by.

The interval tracking information byte stores and recognizes the set pattern of the corresponding light path.

The monitoring channel alarm detection information byte indicates the normal and BDI_SV status of the monitoring channel and the OCH-REI (remote error indication) status for reporting to the counterpart when an error is detected in the received BIP.

FIG. 7 is an explanatory diagram of faults 1 and 2 of the optical signal alert detection byte and the status information monitoring byte defined in FIG.

Referring to FIG. 7, a loss of an input dependent signal (OCH-LOC) occurs in the OCH layer 13 between the single station WDM systems (ie, failure 1) or a failure of the transmission OCH layer (ie, failure 1). Obstacle 2: If the OCH monitoring channel is normal but malfunctions in the OCH), OCH layer generates OCH-FDI (Forward Defect Indication) through the optical channel section and detects the OCH-FDI at the receiving OCH layer of the large station. Recognizes that the alarm is generated at the downlink stage by generating a down FDI and suppressing an alarm that may occur at the connected slave station.

In addition, the status monitoring information byte (SISB) informs the type of failure.

In the opposite direction, OCH-BDI (Backward Defect Indication) is generated so that the reception OCH layer of the power can be recognized.

Here, the down FDI is not included in the overhead in the interval but informed by a separate channel in the system.

In FIG. 7, when the alarm of the upper layer is generated, the lower alarm is suppressed, and the fact is notified to the other station so as to recognize that an abnormality has occurred in a signal sent from the other station, thereby enabling effective monitoring control function. In addition, this information can be used to search for the location of the failure.

FIG. 8 is an explanatory diagram of faults 3 and 4 of the optical signal alert detection byte and the status information monitoring byte defined in FIG.

Referring to FIG. 8, the failure 3 is generated at the OCH output terminal, and after detecting the optical channel signal loss (OCH-LOS) at the receiving OCH layer of the large station without any action to be taken in the OTS and OMS layers, the downlink is moved downward. It generates the FDI to suppress the alarm that can occur in the connected slave station. In the opposite direction, it generates OCH-BDI (Backward Defect Indication) so that the receiving OCH layer of the large station can recognize it.

In addition, fault 4 detects LOS-OTS and LOS-OMS in OTS or OMS layer of a large station due to higher layer (OMS / OTS) or line fault (ie, fault 3) in a single station WDM system. In order to suppress the alarm that may occur in the lower layer, the down FDI is generated, and in the opposite direction, OCH-BDI (Backward Defect Indication) is generated so that the receiving OCH layer of the large station can be recognized.

In FIG. 8, when an alarm occurs on the monitoring channel of the transmitting station, the detection station is notified to the counterpart station and the lower layer so as to recognize that an abnormality has occurred in the transmitted monitoring channel signal, thereby performing an effective monitoring control function.

FIG. 9 is an explanatory diagram for a failure 5 between the optical signal alert detection byte and the status information monitoring byte defined in FIG. 6.

Referring to FIG. 9, when an OCH monitoring channel failure (i.e., failure 5) occurs in a transmitting station, the LOS-OCH-SV or LOF-OCH-SV is detected at the other station, and the LOS-OCH-SV or LOF-OCH is detected. -SV detection inserts a BDI-OCH-SV into the monitoring channel alarm detection byte to inform the counter station of the alarm detection, and informs the type of failure by the status monitoring information byte (SISB).

In FIG. 9, when an alarm occurs on the monitoring channel of the transmitting station, the detection station is notified to the other station so that an abnormality has occurred in the transmitted monitoring channel signal, thereby performing an effective monitoring control function.

FIG. 10 is an exemplary application diagram of a reception optical channel BIP, an optical channel OBIP byte, an optical quality value byte, and an optical channel interval tracking byte defined in FIG. 6.

Referring to Fig. 10, if the signal transmitted by the left end station WDM system has a performance degradation such as a decrease in device characteristics of a transmission line or a transmission station, the performance degradation is detected in the main optical signal, and the BIP error is detected in the monitoring channel.

In addition, OCH-REI is sent to the transmitting station for BIP error detection.

If the routing is incorrect, the receiving station detects a section tracking mismatch and informs the other station of the fact.

In addition, the performance degradation is monitored through the OCH-OBIP for the dependent signal of the optical channel.

The optical quality value is measured and transmitted to the other station by measuring the output power of the transmitting end, and it is detected by the receiving end and compared with the currently input optical power value to monitor its status, and the received optical power value is transmitted to the other station as the optical quality station value byte. Surveillance of performance degradation can be reliably performed.

In FIG. 10, it can be seen that the performance degradation of the local station and an error in the path setting can be detected.

FIG. 11 is a diagram illustrating an application of the optical channel wavelength allocation byte, the signal level byte, and the APS byte defined in FIG. 6.

Referring to FIG. 11, the optical channel allocation value represents a wavelength allocated to each OCH, and if it is different from the value to be received upon reception, the wavelength length mismatch of the status information monitoring information byte (SISB) to the counter station is performed. MIS) signals to alert you of an alarm.

The signal level information indicates the unique characteristics of each subordinate signal. If the signal level information is different from the value to be received when receiving it, the signal level mismatch (SL-MIS) signal of the Status Information Monitoring Byte (SISB) is transmitted to the other station. Inform alarm.

As such, the bytes are used to match the characteristics of the dependent signal and the OCH layer between the two stations so that the failure occurs when the OCH path is mismatched and its value is inconsistent.

The APS information byte is for accommodating the switching scheme applied to the dependent signal and operates in the same manner as the APS used in the conventional synchronous transmission network.

Although the technical idea of the present invention has been described in detail according to the above preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, according to the present invention, when the overhead is used to realize the supervisory control function in the fiber channel section hierarchy, the other station is notified by informing the counter station or the next station (ie, the node) in the opposite direction in the reverse direction or the progress direction. It is possible to suppress the occurrence of the alarm due to the alarm or lower layer, help in the detection of fault location, and detect the degradation of the transmission performance of the main light signal or the monitoring channel signal. It can be done effectively.

Claims (2)

An overhead storage device of a fiber channel section layer in an optical transmission system, De-multiplexing the monitoring channel signal input from the outside to detect status monitoring information, section tracking information, serial connection monitoring information, optical channel wavelength allocation information, bit interleaved parity (BIP) value, signal level information, optical quality value, monitoring channel alarm Demultiplexing means for outputting information and Automatic Protection Switching information; First storage means for temporarily storing the state monitoring information; Second storage means for temporarily storing the section tracking information; Third storage means for temporarily storing the serial connection monitoring information; Fourth storage means for temporarily storing the optical channel wavelength assignment information; Fifth storage means for temporarily storing the BIP value; Sixth storage means for temporarily storing the signal level information; Seventh storage means for temporarily storing the light quality value; Eighth storage means for temporarily storing the monitoring channel alert detection information; And Ninth storage means for temporarily storing the automatic transfer change information; The overhead storage device of the fiber channel section layer in the optical transmission system comprising a. An overhead storage device of a fiber channel section layer in an optical transmission system, First storage means for temporarily storing state monitoring information input from the outside; Second storage means for temporarily storing interval tracking information input from the outside; Third storage means for temporarily storing the serial connection monitoring information input from the outside; Fourth storage means for temporarily storing the optical channel wavelength assignment information input from the outside; Fifth storage means for temporarily storing a bit interleaved parity (BIP) value input from the outside; Sixth storage means for temporarily storing signal level information input from the outside; Seventh storage means for temporarily storing the light quality value input from the outside; Eighth storage means for temporarily storing the monitoring channel alarm detection information input from the outside; Ninth storage means for temporarily storing Automatic Protection Switching information input from the outside; And Multiplexing the state monitoring information, the section tracking information, the serial connection monitoring information, the optical channel wavelength allocation information, the BIP value, the signal level information, the optical quality value, the monitoring channel alarm detection information, and the automatic transfer switching information. Multiplexing means The overhead storage device of the fiber channel section layer in the optical transmission system comprising a.