JP6684441B2 - Optical communication system, optical communication device, optical communication diagnostic monitoring method, and optical communication diagnostic monitoring program - Google Patents

Description

  The present invention relates to an optical communication system, an optical communication device, an optical communication diagnostic monitoring method, and an optical communication diagnostic monitoring program.

  As the transmission rate of the optical module increases, the power consumption of the optical module also increases and the amount of heat generated by the module itself tends to increase. This often leads to deterioration of the components used inside the optical module. In addition, the components of the optical module have become precise and complicated, and the assembly failure and the reduction of the proof stress of the components have increased, and the network failure due to the failure of the optical module has been increasing. Therefore, in recent years, it has come to have a DDM (digital diagnostics monitoring) function for confirming the status of the optical module.

  In the above technical field, Patent Document 1 stores status data relating to the operating environment status of each unit in an optical transceiver as history information, and temporarily suspends update of history information when a failure occurs in the optical transceiver. Then, the technique of receiving the permission signal and restarting is disclosed. Further, in Patent Document 2, when the control unit included in the controller of the optical transceiver detects an abnormality of the optical transceiver, the abnormality log information is written in the nonvolatile memory, and is not written after the number of times of writing reaches a predetermined number. Techniques for controlling are disclosed.

JP, 2005-117416, A JP, 2013-131893, A

  However, in the technique described in the above-mentioned document, since the writing of the log and the history retention are triggered by the detection of the occurrence of a failure or the abnormality in the optical module (optical transceiver), information related to the failure or the abnormality is usually obtained. It was not possible to reflect changes in the status during operation and reflect them in the cause analysis or prediction of failures or failures. Therefore, for example, the DDM function is often not fully utilized.

  An object of the present invention is to provide a technique that solves the above problems.

In order to achieve the above object, the optical communication device according to the present invention,
In the optical communication, diagnostic monitoring means for diagnosing and monitoring the state of the optical module that mutually converts an optical signal and an electrical signal,
A non-volatile memory for storing the diagnostic monitoring result by the diagnostic monitoring means;
Collection means for collecting diagnostic monitoring history by selecting a predetermined diagnostic monitoring result from the diagnostic monitoring results and storing it in an empty area of the non-volatile memory,
An optical communication device comprising:
The collection of the diagnostic monitoring history by the collecting unit is a period longer than the diagnostic monitoring period by the diagnostic monitoring unit and capable of grasping the state transition of the optical module, and a period in which the processing of the optical communication device is not stressed. Tried in
The collecting means has a comparing means for comparing the specific information of the diagnostic monitoring result stored last time and the specific information of the new diagnostic monitoring result, and when the specific information does not match, the new diagnostic The monitoring result is stored in the empty area of the nonvolatile memory .

In order to achieve the above object, the optical communication diagnostic monitoring method according to the present invention,
In the optical communication, a diagnostic monitoring step for diagnostic monitoring of the state of the optical module that mutually converts an optical signal and an electrical signal,
A storage step of storing the diagnostic monitoring result by the diagnostic monitoring step in a non-volatile memory,
A collection step of collecting a diagnostic monitoring history by selecting a predetermined diagnostic monitoring result from the diagnostic monitoring results and storing it in an empty area of the nonvolatile memory;
An optical communication diagnostic and monitoring method for an optical communication device including:
The collection of the diagnostic monitoring history in the collecting step is a cycle longer than the diagnostic monitoring cycle in the diagnostic monitoring step and capable of grasping the state transition of the optical module, and a cycle not overwhelming the processing of the optical communication device. Tried in
The collecting step includes a comparing step of comparing the previously stored specific information of the diagnostic monitoring result with the specific information of the new diagnostic monitoring result, and when the specific information does not match, the new diagnostic monitoring is performed. The result is stored in the empty area of the non-volatile memory .

In order to achieve the above object, an optical communication diagnostic monitoring program according to the present invention,
In the optical communication, a diagnostic monitoring step for diagnostic monitoring of the state of the optical module that mutually converts an optical signal and an electrical signal ,
A storage step of storing the diagnostic monitoring result by the diagnostic monitoring step in a non-volatile memory,
From the diagnostic monitoring result, by storing in the empty area of the non-volatile memory by selecting a predetermined diagnostic monitoring results, a collection step of collecting diagnostic monitoring history,
An optical communication diagnostic monitoring program for an optical communication device that causes a computer to execute:
The collection of the diagnostic monitoring history in the collecting step is a cycle longer than the diagnostic monitoring cycle in the diagnostic monitoring step and capable of grasping the state transition of the optical module, and a cycle not overwhelming the processing of the optical communication device. Tried in
The collecting step includes a comparing step of comparing the previously stored specific information of the diagnostic monitoring result with the specific information of the new diagnostic monitoring result, and when the specific information does not match, the new diagnostic monitoring is performed. The result is stored in the empty area of the non-volatile memory .

In order to achieve the above object, the optical communication system according to the present invention,
An optical network using the optical communication device is provided, and the diagnostic monitoring history collected in the empty area of the non-volatile memory is acquired when the optical communication device is activated to perform diagnostic monitoring of the optical network.

  According to the present invention, it is possible to fully utilize the diagnostic monitoring function of the optical module, to grasp the situation change during normal operation and reflect it in the cause analysis or prediction of the failure or failure.

It is a block diagram which shows the structure of the optical communication apparatus which concerns on 1st Embodiment of this invention. It is a block diagram which shows the structure of the wireless base station as an optical communication system containing the optical communication apparatus which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the structure of the optical communication apparatus which concerns on 2nd Embodiment of this invention. It is a figure which shows the memory | storage structure of the non-volatile memory (EEPROM) which concerns on 2nd Embodiment of this invention. It is a figure which shows the memory | storage structure of the detected value and status bit which concern on 2nd Embodiment of this invention. It is a figure which shows the memory | storage structure of the alarm flag and warning flag which concern on 2nd Embodiment of this invention. It is a figure which shows the memory | storage structure of the log storage area in the non-volatile memory (EEPROM) which concerns on 2nd Embodiment of this invention. It is a figure which shows the structure of the date information stored in the log storage area which concerns on 2nd Embodiment of this invention. It is a figure which shows the structure of the status information stored in the log storage area which concerns on 2nd Embodiment of this invention. It is a figure which shows the log storage state stored in the flag area of the log storage area which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the hardware constitutions of the control part of the optical communication apparatus which concerns on 2nd Embodiment of this invention. It is a figure which shows the structure of the log collection table which concerns on 2nd Embodiment of this invention. It is a figure which shows the structure of the log storage determination table and log output determination table which concern on 2nd Embodiment of this invention. It is a flow chart which shows a processing procedure by a control part of a radio base station RF section as an optical communication device concerning this embodiment concerning a 2nd embodiment of the present invention. It is a flow chart which shows a processing procedure by a control part of a radio base station RF section as an optical communication device concerning this embodiment concerning a 2nd embodiment of the present invention. It is a flow chart which shows a processing procedure by a control part of a radio base station RF section as an optical communication device concerning this embodiment concerning a 2nd embodiment of the present invention. It is a block diagram which shows the structure of the optical communication apparatus which concerns on 3rd Embodiment of this invention. It is a block diagram which shows the structure of the core network as an optical communication system containing the optical communication apparatus which concerns on 4th Embodiment of this invention. It is a block diagram which shows the structure of the data center as an optical communication system containing the optical communication apparatus which concerns on 5th Embodiment of this invention.

  Embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, the constituent elements described in the following embodiments are merely examples and are not intended to limit the technical scope of the present invention thereto.

[First Embodiment]
An optical communication device 100 as the first embodiment of the present invention will be described with reference to FIG. The optical communication device 100 is a device that can diagnose and monitor the state of an optical module.

  As shown in FIG. 1, the optical communication device 100 includes a diagnosis monitoring unit 101, a non-volatile memory 102, a collection unit 103, and an output unit 104. The diagnostic monitoring unit 101 diagnostically monitors the state of an optical module that mutually converts an optical signal and an electrical signal in optical communication. The non-volatile memory 102 stores the diagnostic monitoring result by the diagnostic monitoring unit 101. The collection unit 103 collects diagnostic monitoring history by selecting a predetermined diagnostic monitoring result from the diagnostic monitoring results and storing it in the empty area 121 of the non-volatile memory 102. The output unit 104 outputs the diagnostic monitoring history collected in the nonvolatile memory 102 when the predetermined output condition 141 is satisfied when the optical communication device 100 is activated. Note that the configuration in which the optical module 110 in FIG. 1 includes the diagnostic monitoring unit 101 and the non-volatile memory 102 is not essential. Further, the configuration in which the collection unit 103 and the output unit 104 are outside the optical module 110 is not essential.

  According to the present embodiment, when a predetermined diagnostic monitoring result is selected from the diagnostic monitoring results, stored in the empty area of the non-volatile memory, and collected, the diagnostic monitoring history satisfies the predetermined output condition when the optical communication device is activated. Since the output is made, the diagnostic and monitoring function of the optical module can be fully utilized to grasp the situation change during normal operation and reflect it in the cause analysis or prediction of the failure or failure.

[Second Embodiment]
Next, an optical communication system having the optical communication device according to the second embodiment of the present invention will be described. An optical communication system having an optical communication device according to this embodiment is a wireless base station, and includes a wireless base station baseband unit and a wireless base station RF (radio frequency) unit as an optical communication device. That is, the present embodiment is an example in which the present invention is applied to a wireless base station.

<< Configuration of optical communication system (wireless base station) >>
FIG. 2 is a block diagram showing the configuration of the radio base station 200 as an optical communication system including the optical communication device according to the present embodiment.

  The radio base station 200 includes a radio base station baseband unit 210 and two radio base station RF units 220 and 230. The radio base station baseband unit 210 handles signals before modulation or demodulation, and the radio base station RF units 220 and 230 process signals in the frequency band of electromagnetic waves that actually fly in the air. The wireless base station baseband unit 210 and the wireless base station RF unit 220 are connected by the optical network 241 via the optical module 211 and the optical module 221, and the wireless base station baseband unit 210 and the wireless base station RF unit 230 are An optical network 242 is connected via the optical modules 212 and 231.

  The radio base station baseband unit 210 includes an optical module 211, an optical module 212, and a SERDES (SERializer / DESerializer) _I / F 213. The SERDES_I / F 213 converts serial data obtained by converting the optical signals received by the optical modules 211 and 212 into electrical signals into parallel data. Further, the SERDES_I / F 213 receives the parallel data to be transmitted, converts the parallel data into serial data, and outputs the serial data to the optical modules 211 and 212. The radio base station RF unit 220 includes an optical module 221 and a SERDES_I / F 222. The radio base station RF unit 230 includes an optical module 231 and a SERDES_I / F 232. Although not shown, the radio base station baseband unit 210 and the two radio base station RF units 220 and 230 have a control unit that controls the entire apparatus.

(Issues of prerequisite technology)
First, in order to clarify the configuration of the present embodiment and its effect, problems and issues of the base technology will be described with reference to FIG.

  For example, in the wireless base station 200 of FIG. 2, when a failure occurs in any of the optical modules at the transmission end and the reception end in the network connected by the optical fiber, the network is disconnected, but which side has a failure. It is often difficult to isolate whether a problem has occurred. That is, when a failure occurs in the optical network 241 of FIG. 2 and the network between the radio base station baseband unit 210 and the radio base station RF unit 220 is disconnected, the cause of the failure is considered as follows. If the optical module 211 of the radio base station baseband unit 210 fails, the optical module 221 of the radio base station RF unit 220 fails, or the optical network 241 fails, the SERDES_I / F 213 of the radio base station baseband unit 210. There may be a case where a problem occurs in 1) or a problem occurs in the SERDES_I / F 222 of the RF unit 220 of the wireless base station.

  However, when a failure occurs in the optical network 241, the network between the radio base station baseband unit 210 and the radio base station RF unit 220 is cut off, so that there is no method for isolating a plurality of causes of failure, and analysis cannot be performed. There is a problem. In this case, either the wireless base station baseband unit 210 or the wireless base station RF unit 220 having the optical module is collected and an attempt is made to reproduce it. Alternatively, the optical module 211 or the optical module 221 is collected and a similar device is used to make a reproduction investigation. However, if the reproducibility of the failure is low, a large amount of time and cost are wasted.

(Characteristics of this embodiment)
In the present embodiment, the DDM (digital diagnostics monitoring) function for confirming the status of the optical module is utilized as much as possible, and a mechanism useful for analysis at the time of failure is studied and incorporated into the system. That is, the user-usable area of the EEPROM (Electrically Erasable Programmable Read-Only Memory) that the optical module has is utilized as a log storage area with time information, and a device having an optical network by analyzing the log information when a failure occurs, Alternatively, the suspected part can be identified without collecting the optical module. In the present embodiment, the operating state of the optical module itself and the operating state of the interface connected to the optical module are periodically checked, and the operating state is logged in the EEPROM of the optical module. Then, the log is provided to a device connected to the optical module by an optical fiber. Note that it is desirable that the processing of logging and log provision be performed outside the optical module.

  The log information includes the diagnostic information selected from the diagnostic monitoring results and the monitoring information selected from the diagnostic monitoring results, and further includes the diagnostic information by the interface that exchanges electrical signals with the optical module. Here, the timing of logging the operation status to the EEPROM is such that the already accumulated diagnostic monitoring result and the newly selected diagnostic monitoring result are compared and they do not match. You can save a long-term history of operational status, even if restricted. Further, the log providing timing may be, for example, the timing when the log writing area becomes full and the device recovers from the failure, or even when the network failure does not occur after the administrator prohibits writing the log information. If you restart. This is because the failure is often recovered by restarting the device, the network failure often leads to the service interruption of the service provider, and the device is often restarted to restart the service. Therefore, it is possible to automatically raise the log to the host device after the failure recovery, analyze the failure even after the service is restarted, and save the cost and time of collecting the log to the failed network node. Become.

<< Configuration of optical communication device >>
FIG. 3 is a block diagram showing the configuration of the optical communication device according to the present embodiment. In FIG. 3, the radio base station RF unit 220 is described as an optical communication device, but other optical communication devices also have similar effects with the same configuration. In FIG. 3, the same components as those in FIG. 2 are designated by the same reference numerals.

  The radio base station RF unit 220 includes an optical module 221, a Programmable IC 320 having a SERDES_I / F 222, and an RF unit control unit 340.

  The optical module 221 is a general module such as SFP (Small Form-factor Pluggable), and has a Controller 311 having a DDM function 312 and an EEPROM 313, a Limiting AMP 314, a Laser Driver 315, a TOSA (Transmitter Optical SubAssembly), and a ROSA. (Receiver Optical Sub Assembly) or BOSA (Bi-directional Optical Sub Assembly).

  The Programmable IC 320 is connected by the optical module 221, the high-speed serial transmission electric signal 331, and the high-speed serial reception electric signal 332 by the SERDES_I / F 222, and processes transmission / reception data for serial optical communication.

  The RF unit controller 340 is connected to the Programmable IC 320 by the Peripheral I / F 353, and is connected to the Programmable IC 320 by the I2C (Inter-Integrated Circuit) I / F 351 which is a two-wire serial interface and the I2C I / F 352. An RF unit CPU 341 that controls the operation of the radio base station RF unit 220 is included. Further, the RF unit control unit 340 has a Memory 342 connected to the RF unit CPU 341 by an EMIF (External Memory Interface) 345. The Memory 342 stores a log collection program 343 and a log collection table 344, and the RF unit CPU 341 collects logs of the optical module 221 according to the log collection program 343 and accumulates a history in the EEPROM 313.

<< Nonvolatile memory (EEPROM) >>
FIG. 4A is a diagram showing a storage configuration of the nonvolatile memory (EEPROM) 313 according to this embodiment. FIG. 4A shows a storage configuration of an area of the nonvolatile memory (EEPROM) 313 with an I2C address of A2 (Hex). Such a storage configuration is standardized in SFF-8472 (Specification for Diagnostic Monitoring Interface for Optical Transceivers, Rev 11.0, September 14, 2010), which is a diagnostic monitoring interface specification for optical transceivers.

  In the area of address A2 (Hex) of the EEPROM 313, Real Time Diagnostic Interfaces (24 bytes) 410 and 420 which are diagnostic monitoring targets of the optical module are secured in bytes 96 to 119. A user writable User Writable EEPROM (120 bytes) 430 is secured in bytes 128 to 247 in the area of the address A2 (Hex) of the EEPROM 313. In this specification, the byte number is a count value from zero.

  In the present embodiment, in order to store the operating state of the optical module 221 itself and the operating state of the SERDES I / F 222 connected to the optical module 221, as a log, a USER WRITABLE EEPROM that is an unused area is used as the log storage area 430. To use.

(Detection value and status bit)
FIG. 4B is a diagram showing a storage configuration 410 of detected values and status bits according to the present embodiment. The storage configuration 410 is standardized in SFF-8472.

  In the detection value and status bit storage arrangement 410, bytes 96 and 97 have temperature monitor value 401, bytes 98 and 99 have power supply voltage monitor value 402, bytes 100 and 101 have bias current monitor value 403, and bytes 102 and 103 have transmit power. Monitor value 404, bytes 104 and 105 are received power monitor value 405.

  In the detection value and status bit storage structure 410, the byte 110 is a status / control bit, and the bits used for log collection in this embodiment are bit 7 is TX_DISABLE 411, bit 4 is RATE_SELECT 412, bit 2 is TX_FAULT 413, and bit 2 is TX_FAULT 413. 1 is RX_LOS 414.

(Alarm flag and warning flag)
FIG. 4C is a diagram showing a storage configuration 420 of the alarm flag and the warning flag according to the present embodiment. The storage configuration 420 has standard specifications specified in SFF-8472.

  In the alarm flag and warning flag storage structure 420, bytes 112 and 113 are Alarm bits and bytes 116 and 117 are Warning bits.

  In the storage configuration 420 of the alarm flag and the warning flag, the bits used for log collection in this embodiment are Alarm 421 to 42A of all the bits of byte 112 and bits 7 and 6 of byte 113. The bit number of each byte starts from zero.

<< Log storage area >>
FIG. 5 is a diagram showing a storage configuration of the log storage area 430 in the nonvolatile memory (EEPROM) 313 according to this embodiment. The log storage area is a user writable area of bytes 129 to 248 of the area where the I2C address is A2 (Hex) shown in FIG. 4A. In FIG. 5, the same components as those in FIG. 4B are designated by the same reference numerals.

  Seven LOG areas 510 to 570, one reserve area 580, and one flag area 590 are allocated to the log storage area 430. In each LOG area 510 to 570, date / time information 511, status information (Status) 512, temperature monitor value 401, power supply voltage monitor value 402, bias current monitor value 403, transmission power monitor value 404, reception The power monitor value 405 and are allocated, and one LOG area has a capacity of 16 bytes.

  The storage configuration of the log storage area 430 is not limited to the configuration shown in FIG. For example, although seven LOG areas are used in FIG. 5, if the number of LOG areas is reduced, the Warning bits and the like stored in bytes 116 and 117 of FIG. 4C can also be collected. Also, if the number of LOG areas is increased, the amount of information per time decreases, but a long-term history or detailed history can be acquired. As described above, the storage configuration and the diagnostic monitoring information to be selected can be variously changed depending on the diagnostic monitoring target.

(Date and time information)
FIG. 6 is a diagram showing a configuration 600 of the date / time information 511 stored in the log storage area according to the present embodiment.

  According to the time allocation of the configuration 600, the date and time information 511 of FIG. 5 represents the years 0 to 99 with a 7-bit width (128 years in MAX) based on the year 2000, and the date 620 has 365 days with 9 bits. The width (maximum 512 days) is represented, and the time 630 is represented by 17-bit width (maximum 131,072 seconds) by examining one day in seconds (86,400 seconds).

(Status information)
FIG. 7 is a diagram showing the configuration of the status information 512 stored in the log storage area according to this embodiment. In FIG. 7, the same components as those in FIG. 4B or FIG. 4C have the same reference numerals.

  EEPROM information diagnosed by the DDM function by the optical module 211 shown in FIG. 4B or 4C is assigned to the status information 512. Further, in order to isolate a failure caused by the optical module 211 and the other one, only one bit, “LOSS of frame” which is the Status of the SERDES I / F 222 in FIG. 3, is added to the status information 512. The configuration of the status information is not limited to that shown in FIG. 7, and may be a Warning bit, for example.

(Flag area)
FIG. 8 is a diagram showing a log storage state stored in the flag area 590 of the log storage area according to the present embodiment. The flag area 590 is used to control writing to and reading from the LOG areas 510 to 570.

  As shown in FIG. 8, the flag area 590 is provided with a bit 811 indicating the usage status of each LOG area and a LOCK flag 812 for prohibiting writing to the LOG area, and management for preventing information loss at the time of failure due to log overwriting. I do. The high-order 7 bits of the flag area 590 are used as a bit 811 indicating the usage status of each LOG area, and the lowest bit is used as a LOCK flag 812 that prohibits writing to the LOG area.

  The completion of writing to each LOG area 510 to 570 is indicated by setting each of the upper 7 bits to "1". Therefore, the written 802 to LOG1 (510) is represented by 80 (h), and the written 803 to 807 to LOG2 (520) to LOG6 (560) are C0 (h) and E0 (h) in the following order. ), F0 (h), F8 (h), FC (h). Then, the written 808 to the LOG7 (570) is represented by FF (h) by setting the LOCK flag 812 in which the log storage area is full.

  In addition, 5A (h) indicating the initial setting 801 when the log storage area is empty, A5 (h) indicating the LOG transmission disabled 810 where the log could not be transmitted, and bit 7 indicating the overwrite prohibition setting 809 by the administrator. And bit 0 is "1" and the other bits are provided with a flag indicating the written status. In addition, XX (h) represents that each numeral and symbol have a hexadecimal value (0 to F).

  The role of each bit in the flag area 590 and the control based on it are not limited to those in the present embodiment. Any method can be used as long as the algorithm can control the log storage in the log storage area and does not cause overwriting or deletion.

<< Hardware Configuration of Control Unit of Optical Communication Device >>
FIG. 9A is a block diagram showing a hardware configuration of the RF unit control unit 340 of the radio base station RF unit 220 as the optical communication device according to the present embodiment. In FIG. 9A, the same components as those in FIG. 3 have the same reference numerals.

  In FIG. 9A, an RF unit CPU (Central Processing Unit) 341 is a processor for arithmetic control, and realizes the functional configuration unit of FIG. 3 by executing a program. A ROM (Read Only Memory) 920 stores fixed data and programs such as initial data and programs. The communication control unit 930 controls communication with the Controller 311 and SERDES_I / F 222 via I2C.

  A RAM (Random Access Memory) 940 is a random access memory used by the RF CPU 341 as a work area for temporary storage. The RAM 940 has an area reserved for storing data necessary for realizing the present embodiment. The log collection table 344 is a table used to generate a log to be stored in the log storage area from the diagnostic monitoring information stored in the EEPROM 313. The log storage determination table 941 is a table used to determine whether to store the log generated from the diagnostic monitoring information. The log output determination table 942 is a table used for determining whether to output the log stored in the log storage area. The program execution area 943 is an area for executing a program stored in the storage 950.

  The storage 950 stores a database, various parameters, or the following data or programs necessary for realizing the present embodiment. The RF unit data storage unit 951 stores data necessary for controlling the radio base station RF unit 220. The RF unit data storage unit 951 includes a status update cycle for setting the execution timing of the LOG read sequence. The storage 950 stores the following programs. The RF unit control program 952 is a program for controlling the entire radio base station RF unit 220. The log collection program 343 is a program that generates a log to be stored in the log storage area from the diagnostic monitoring information stored in the EEPROM 313 and outputs the log stored in the log storage area.

  The input / output interface 960 provides an interface for controlling data input / output with an input / output device. In this embodiment, the programmable IC 320 is connected to the input / output interface 960 via the Peripheral I / F 353. Also. A display unit 961, an operation unit 962, a GPS (Global Positioning System) position determination unit 963, etc. may be connected.

  Note that the RAM 940 and the storage 950 in FIG. 9A do not show programs or data related to general-purpose functions of the radio base station RF unit 220 or other feasible functions.

(Log collection table)
FIG. 9B is a diagram showing the configuration of the log collection table 344 according to this embodiment. The log collection table 344 is used to generate log history information to be stored in the log storage area of FIG. 5 from the diagnostic monitoring information by the DDM function of FIGS. 4B and 4C.

  The log collection table 344 stores log storage collection data 971 and log storage generation data 972 selected and generated from the log storage collection data 971. Here, the log storage collection data 971 includes the detection value and the status bit of FIG. 4B, and the alarm flag and the warning flag of FIG. 4C. Further, the log storage generation data 972 is log information of each LOG area 510 to 570 in FIG. 5 including the status information 512 in FIG. 7.

  Since the log storage collection data 971 and the log storage generation data 972 are transmitted and received by the I2C_I / F 351 in this embodiment, 256 bytes (byte 0 to 255) of the address A2 (h) shown in FIG. 4A are stored. Are collectively read, and log information is added and collectively written in FIG. 9B. However, other read / write processing may be performed depending on the configuration of the EEPROM or the interface specifications.

(Log storage judgment table / Log output judgment table)
FIG. 9C is a diagram showing the configurations of the log storage determination table 941 and the log output determination table 942 according to this embodiment. The log storage determination table 941 is used to determine whether to additionally write new log information in the empty area of the EEPROM 313. The log output determination table 942 is used to determine whether to output the log information collected in the empty area of the EEPROM 313 when the wireless base station RF unit 220 is activated.

  The log storage determination table 941 stores the status information 512 (t-1) stored last time and the status information 512 (t) generated this time. Then, a match or mismatch 981 of the comparison result and a match or mismatch 981 based on whether to store or not to store 982 are stored. In the log storage determination table 941 of FIG. 9C, whether the status information matches or does not match is used as the determination condition, but comparison of other information may be added. Further, although the judgment condition is whether it is coincident or non-coincidence, it may be judged as coincidence if the difference is within a certain range with a margin or the difference of the specific information is not stored. Alternatively, the log information may be weighted, and the match / mismatch may be scored to determine whether or not the threshold value is equal to or more than the threshold value.

  Whether or not the log output determination table 942 outputs log information based on the activation completion flag 991 of the radio base station RF unit 220, the data 992 of bit 7 and bit 0 of the flag area, and the data 992 of bit 7 and bit 0. The determination result 993 is stored. In the configuration of the flag area of this embodiment, the collected log information is output (transmitted) when both bit 7 and bit 0 are “1”, and either bit 7 or bit 0 is “0”. In this case, log information is not output (transmitted). Such output determination corresponds to the configuration of the flag area, and is not limited to FIG. 9C.

<< Processing procedure of control unit of optical communication device >>
10A to 10C are flowcharts showing a processing procedure by the RF unit control unit 340 of the radio base station RF unit 220 as the optical communication device according to the present embodiment. This flow chart is executed by the RF unit CPU 341 of the RF unit control unit 340 using the RAM 940 to realize the log collection of this embodiment.

  After the start or restart of the optical communication device is completed, the RF unit CPU 341 reads the flag area 590 and checks the flag area 590 in step S1001. That is, the flag area 590 is compared with all of the setting patterns shown in FIG. Then, in step S1003, the RF unit CPU 341 determines whether or not the flag area 590 matches any of the setting patterns shown in FIG. If they do not match, it is considered as the first device activation, and the RF unit CPU 341 writes A5 (h) in the flag area 590 and initializes the flag area 590 in step S1005.

  After the initialization is completed, the RF unit CPU 341 performs a LOG reading sequence in step S1007. The LOG reading sequence is executed at a predetermined timing. It is desirable that the status update cycle indicating the predetermined timing is 100 ms or more, a cycle in which the state transition of the SFP can be grasped, and that the processing of the FR unit CPU 341 is not stressed. This is because the update cycle of Status of the EEPROM 313 is within 100 ms in SFF-8472 Rev 12.2, so the update cycle is 100 ms at the shortest. However, if the update cycle is too short, the processing of the FR unit CPU 341 or the master device becomes heavy, and the processing speed originally performed by the FR unit CPU 341 or the master device is affected. For example, in this example, it is often 500 ms to 1 sec since the status confirmation of the system that is normally performed is often a 1 sec cycle.

  The LOG read sequence (S1007) is a common sequence for reading the diagnostic monitoring information collected by the DDM function for writing to LOG1 to LOG7 (510 to 570) in FIG. This common sequence consists of reading the Status bit of the optical module in step S1071, reading the optical module Real time diagnostic register in step S1073, reading the LOF status of the SERDES I / F in step S1075, and reading the time information in step S1077. Read and perform. The order of steps S1071 to S1077 is not limited to that of FIG. 10A. Note that the time information read in step S1077 needs to leave information up to the hour, minute, and second in addition to the year, month, and day. Therefore, the world standard time or GPS information used by each device as the reference time is used as the RF unit CPU 341. Shall be obtained and shall follow the time allocation of FIG. Hereinafter, the same step numbers are assigned to the common sequences.

  After completion of the LOG read sequence in step S1007, the RF unit CPU 341 executes LOG write in accordance with the information write allocation bit of LOG1 (510) in FIG. 8 in step S1009, and sets 80 in the flag area as a LOG1 (510) write completion flag. Write (h).

  When the flag area 590 matches any of the setting tables in the determination of step S1003, the RF unit CPU 341 checks the Lock bit of the flag area 590 whether or not log writing is possible in step S1011. The RF unit CPU 341 determines the check result in step S1013. If the Lock bit is "0", there is still a writable area in the LOG area and write-protection for holding the LOG has not been performed, so the processing advances from FIG. 10B to FIG. 10C.

  When the Lock bit is "1", it is judged that the LOG area is completely filled up, or further writing is prohibited, and the process of transmitting the already written LOG to the host device is performed. The RF CPU 341 reads out LOG1 to LOG7 (510 to 570) in step S1015. Then, in step S1017, the RF unit CPU 341 transmits LOG1 to 7 (510 to 570) to the Programmable IC 320 via the Peripheral I / F 353 in order to transmit LOG information from the SERDES I / F 222 to the host device. That is, when the optical communication device is restarted after a failure occurs, the diagnostic monitoring history collected in the non-volatile memory is output via the failure path.

  In step S1019, the RF unit CPU 341 determines whether or not the transmission of the LOG information to the host device has succeeded. When the transmission of LOG1 to 7 (510 to 570) from the optical module 221 to the host device via the SERDES I / F 222 is successful, it is not necessary to hold LOG1 to 7 (510 to 570). Therefore, in step S1019, the RF unit CPU 341 writes A5 (h) in the flag area 590 in order to initialize the log storage area (User Writable EEPROM in FIG. 4A) 430.

  If the LOG1 to 7 (510 to 570) cannot be transmitted from the optical module 221 to the host device, the recovery of the optical network 241 may not be realized even if the device is restarted. Therefore, in step S1021, the RF unit CPU 341 writes A5 (h) meaning “LOG transmission not possible” in the flag area 590, and ends the log writing.

  The processes of FIGS. 10B to 10C are similar in processing procedure except that the log write position (510 to 570) and the write data of the flag area 590 are different according to the write position as shown in FIG. explain.

  The RF unit CPU 341 compares the writable area of the flag area 590 with the bit pattern of FIG. 8 in steps S1031 to S1081. When each empty area is identified, the RF unit CPU 341 performs a common sequence LOG reading sequence in step S1007.

  In this example, the number of LOG storage areas is limited to seven, so if log data changes can be seen, they are saved. Therefore, the RF unit CPU 341 compares the value of the newly generated status information with the status information (Status Register) 512 of the LOG saved immediately before in steps S1033 to S1083. Then, the RF unit CPU 341 determines in step S1035 to S1085 whether or not there is a change from the comparison result.

  If there is a change, the RF unit CPU 341 writes the LOG information to the writable LOG area and writes the write completion flag “1” corresponding to the LOG area written in the flag area 590 in steps S1037 to S1087. When the LOG is written in the LOG7 area, the RF section CPU 341 writes "1" in the Lock bit at the same time as the write completion flag in step S1087 to prevent overwriting, and ends the log writing.

  The history of the diagnostic monitoring information acquired by this procedure is stored in either the higher-level device (in the example of FIG. 2, the wireless base station baseband unit 210) or the EEPROM 313 in the optical module 221 of the wireless base station RF unit 220. Left behind. Therefore, by analyzing the log information around the optical module remaining in the wireless base station baseband unit 210, it is possible to analyze the failure that has occurred in the optical network 241 or 242. Further, by collecting only the optical module 221 and comparing the log of the wireless base station baseband unit 210 with the log of the EEPROM 313 in the optical module 221, it is possible to analyze the failure that has occurred in the optical network 241 or 242. In other words, it is possible to solve the problem that there is no means for distinguishing a plurality of causes of failure, and that cost loss and time loss occur due to collecting the set of devices or the optical modules at both ends of the optical network and performing a reproduction test. Become.

  According to the present embodiment, the diagnostic monitoring history is stored when there is a change and is output when the predetermined output condition is satisfied at the time of starting the optical communication device, so that the amount of information can be reduced while reducing the used capacity of the nonvolatile memory. By making full use of the diagnostic monitoring function of the optical module, it is possible to grasp the situation change during normal operation and reflect it in the cause analysis or prediction of the failure or failure.

  That is, the user-usable area of the EEPROM of the optical module is used as a log storage area with time information, and when a failure occurs, the log information is analyzed to recover the suspected area without collecting the device or optical module having an optical network. Enables identification of.

  For example, it is possible to shorten the time for which the service provider using the optical network suspends the service for investigating the cause of the optical network failure. In addition, it is possible to save the trouble of having a service provider using the optical network obtain the log again. In addition, it is possible to quickly investigate the area around the optical interface, and it is possible to reduce the time from the occurrence of a failure to the start of the investigation in a short time. Further, when the optical network failure is not recovered, the confirmation of the periphery of the optical interface can be checked only by sending the suspected optical module, and the transportation cost of the service provider can be suppressed.

  More specifically, for example, in the normal log acquisition method, the CPU of the device periodically checks the status register of the interface to be monitored, and when the status shows an abnormal value, the abnormal value is directly sent to the host device. Does not send, but assigns a code to each abnormal value as alarm information and sends the code to the host device. Then, the higher-level device that has received the alarm code identifies the faulty suspected location from the code and reports it to the system operator. According to this method, it is possible to reduce the amount of information to be transmitted to the host device when a failure occurs, so that it is possible to suppress pressure on the transmission capacity of the network connected to the host device. In a single network with no built-in redundancy, when a network failure occurs, the upper device cannot raise the alarm code itself, and various failures due to network failures occur frequently, so multiple alarms It is possible to go up to the device. In this case, the alarm code that arrives at the host device sooner is notified to the system operator as the cause of the failure, but it is highly possible that the alarm code does not necessarily lead to the true cause, and failure analysis may not work well. Often.

  According to the present embodiment, it is possible to provide a mechanism for avoiding such a situation, temporarily storing the status that leads to the true cause in the optical communication device, and transmitting the status information to the host device when the network is restored. Further, when the network is not restored, it is possible to provide a mechanism for storing the information in the memory in the pluggable device in order to physically extract the status information at the time of failure.

[Third Embodiment]
Next, an optical communication system including the optical communication device according to the third embodiment of the present invention will be described. The optical communication system according to this embodiment is different from the second embodiment in that the control unit of the radio base station RF unit as an optical communication device is inside the optical module. Since other configurations and operations are similar to those of the second embodiment, the same configurations and operations are denoted by the same reference numerals and detailed description thereof will be omitted.

<< Configuration of optical communication device >>
FIG. 11 is a block diagram showing the configuration of the optical communication device 1120 according to this embodiment. Note that, in FIG. 11, the same components as those in FIG. 3 are denoted by the same reference numerals, and duplicate description will be omitted.

  The log collection program 343 described in the second embodiment is installed in the Controller 1111 of the optical module 1121. As a configuration change from FIG. 3, I2C I / F 1152 for acquiring “LOSS of Frame” from SERDES_I / F 222 and Peripheral I / F 1153 for outputting log information collected in the empty area of EEPROM 313 to Programmable_IC 320. And,

  According to the present embodiment, by simply changing the configuration in which the log collection program is installed in the optical module, the diagnostic monitoring function of the optical module is fully utilized to grasp the status change during the normal operation to cause the failure or failure. It is possible to provide an optical communication device that is reflected in analysis or prediction.

[Fourth Embodiment]
Next, an optical communication system having the optical communication device according to the fourth embodiment of the present invention will be described. The optical communication system according to this embodiment is different from the second and third embodiments described above in that the optical communication system to which the present invention is applied is a core network. Since other configurations and operations are the same as those in the second or third embodiment, the same configurations and operations are denoted by the same reference numerals and detailed description thereof will be omitted.

<< Configuration of optical communication system (core network) >>
FIG. 12 is a block diagram showing the configuration of a core network 1210/1220 as an optical communication system including the optical communication device according to this embodiment. The configuration of the core network is not limited to that shown in FIG.

  The core network 1210/1220 has a plurality of communication processing function units connected by optical communication, and these communication processing function units are connected by an SFP having a DDM function. Then, each communication processing function unit collects the diagnosis monitoring history by selecting a predetermined diagnosis monitoring result from the diagnosis monitoring results and storing it in an empty area of the non-volatile memory, and the core network and each communication processing function unit If a predetermined output condition is satisfied at the time of startup, the diagnostic monitoring history collected in the non-volatile memory is output, and the optical communication device according to the present embodiment operates.

  According to the present embodiment, in the diagnostic monitoring of the optical communication in the core network, the diagnostic monitoring function of the optical module is fully utilized to grasp the status change during the normal operation and reflect it in the cause analysis or prediction of the failure or the failure. Can be made.

[Fifth Embodiment]
Next, an optical communication system including the optical communication device according to the fifth embodiment of the present invention will be described. The optical communication system according to this embodiment is different from the second to fourth embodiments in that the optical communication system to which the present invention is applied is a data center. Since other configurations and operations are the same as those in the second to fourth embodiments, the same configurations and operations are denoted by the same reference numerals and detailed description thereof will be omitted.

<< Optical communication system (data center) configuration >>
FIG. 13 is a block diagram showing the configuration of a data center 1300 as an optical communication system including the optical communication device according to this embodiment. The configuration of the data center is not limited to that shown in FIG.

  The data center 1300 has a plurality of data processing function units and communication processing function units connected by optical communication, and these data processing function units and communication processing function units are connected by an SFP having a DDM function. Then, each data processing function unit or each communication processing function unit collects a diagnostic monitoring history by selecting a predetermined diagnostic monitoring result from the diagnostic monitoring results and storing it in an empty area of the nonvolatile memory, and When a predetermined output condition is satisfied at the time of starting each data processing function unit and each communication processing function unit, the diagnostic monitoring history collected in the nonvolatile memory is output, and the optical communication device according to the present embodiment operates.

  According to the present embodiment, in the optical communication diagnostic monitoring in the data center, the diagnostic monitoring function of the optical module is fully utilized to grasp the status change during normal operation and reflect it in the cause analysis or prediction of the failure or failure. Can be made.

[Other Embodiments]
Although the present invention has been described with reference to the exemplary embodiment, the present invention is not limited to the above exemplary embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention. Further, a system or apparatus in which any combination of different features included in each embodiment is included in the scope of the present invention. That is, the present invention is applicable to an apparatus or system in which network equipment is assembled with a single interface without redundancy, and there is a memory area that the system of the equipment does not use, and the status of the interface can be collected. , Produces the same effect.

  Further, the present invention may be applied to a system composed of a plurality of devices or may be applied to a single device. Furthermore, the present invention can be applied to a case where the optical communication diagnostics / monitoring program that realizes the functions of the embodiments is directly or remotely supplied to a system or apparatus. Therefore, in order to realize the functions of the present invention by a computer, a program installed in the computer, a medium storing the program, and a WWW (World Wide Web) server for downloading the program are also included in the scope of the present invention. . In particular, a non-transitory computer readable medium storing a program that causes a computer to execute at least the processing steps included in the above-described embodiments is included in the scope of the present invention.

[Other Expressions of Embodiment]
The whole or part of the exemplary embodiments disclosed above can be described as, but not limited to, the following supplementary notes.
(Appendix 1)
In the optical communication, diagnostic monitoring means for diagnosing and monitoring the state of the optical module that mutually converts an optical signal and an electrical signal,
A non-volatile memory for storing the diagnostic monitoring result by the diagnostic monitoring means;
Collection means for collecting diagnostic monitoring history by selecting a predetermined diagnostic monitoring result from the diagnostic monitoring results and storing it in an empty area of the non-volatile memory,
If a predetermined output condition is satisfied at the time of starting the optical communication device, an output unit that outputs the diagnostic monitoring history collected in the nonvolatile memory,
An optical communication device comprising:
(Appendix 2)
The output condition includes a case where it is determined that there is no empty area in the non-volatile memory or a case where it is determined that writing of the diagnostic monitoring history into the non-volatile memory is prohibited. Optical communication device.
(Appendix 3)
The collecting means has a comparing means for comparing the previously stored specific information of the diagnostic monitoring history with the specific information of the new diagnostic monitoring history, and when the specific information does not match, the new diagnostic 3. The optical communication device according to appendix 1 or 2, wherein the monitoring history is stored in an empty area of the nonvolatile memory.
(Appendix 4)
The collection of the diagnostic monitoring history by the collecting unit is a period longer than the diagnostic monitoring period by the diagnostic monitoring unit and capable of grasping the state transition of the optical module, and a period in which the processing of the optical communication device is not stressed. 4. The optical communication device according to any one of appendices 1 to 3, which is performed in 1.
(Appendix 5)
Note that the output means outputs the diagnostic monitoring history collected in the non-volatile memory via the failure occurrence path when the optical communication device is restarted after a failure occurs. 4. The optical communication device according to any one of 4 above.
(Appendix 6)
The diagnostic monitoring history collected by the collecting means exchanges at least date and time information of collecting the diagnostic monitoring history, diagnostic information by the optical module selected from the diagnostic monitoring results, and an electric signal with the optical module. 6. The optical communication device according to any one of appendices 1 to 5, which includes diagnostic information by an interface unit and monitoring information selected from the diagnostic monitoring results.
(Appendix 7)
7. The diagnostic monitoring unit and the non-volatile memory are in the optical module, and the collecting unit and the output unit are in a control unit that externally controls the optical module. The optical communication device described.
(Appendix 8)
The diagnostic monitoring unit has a digital diagnostic monitoring (DDM) function, and the nonvolatile memory is an EEPROM (Electrically Erasable Programmable Read-Only Memory) included in the optical module. 8. The empty area is a user writable area of the EEPROM, and the information of the diagnostic monitoring history includes information selected from a storage area of the diagnostic monitoring information of the EEPROM, according to any one of appendices 1 to 7. Optical communication device.
(Appendix 9)
The user-writable area has a 2-wire serial interface (I2C: Inter-Integrated Circuit) address A2 (Hex) specified in the diagnostic monitoring interface specification of the optical transceiver (SFF-8472, Rev 11.0, September 14, 2010). 9. The optical communication device according to appendix 8, wherein the storage area of the diagnostic monitoring information is an area of bytes 96 to 119 of A2 (Hex) of the 2-wire serial interface.
(Appendix 10)
The optical communication device according to appendix 9, wherein the selected information includes diagnostic information, a temperature monitor value, a power supply voltage monitor value, a bias current monitor value, a transmission power monitor value, and a reception power monitor value.
(Appendix 11)
The diagnostic information includes bits 1, 2, 4 and 7 of byte 110 of which the address of the two-wire serial interface is A2 (Hex), bits 0 to 7 of byte 112, and bits 7 and 6 of byte 113. The optical communication device according to appendix 10.
(Appendix 12)
In the optical communication, a diagnostic monitoring step for diagnostic monitoring of the state of the optical module that mutually converts an optical signal and an electrical signal,
A storage step of storing the diagnostic monitoring result by the diagnostic monitoring step in a non-volatile memory,
A collection step of collecting a diagnostic monitoring history by selecting a predetermined diagnostic monitoring result from the diagnostic monitoring results and storing it in an empty area of the nonvolatile memory;
When it is determined that there is no empty area in the non-volatile memory at the time of starting the optical communication device, or when it is determined that the writing of the diagnostic monitoring history into the non-volatile memory is prohibited, the non-volatile memory is stored in the non-volatile memory. An output step of outputting the collected diagnostic monitoring history,
Optical communication diagnostic and monitoring method including.
(Appendix 13)
In optical communication, the state of an optical module that mutually converts an optical signal and an electrical signal is diagnostically monitored, and a predetermined diagnostic monitoring result is selected from the diagnostic monitoring results stored in the non-volatile memory, and the non-volatile memory is empty. A collection step for collecting diagnostic monitoring history by storing it in the area;
When it is determined that there is no empty area in the non-volatile memory when the optical communication device is started, or when it is determined that the writing of the diagnostic monitoring history into the non-volatile memory is prohibited, the non-volatile memory is stored in the non-volatile memory. An output step of outputting the collected diagnostic monitoring history,
Optical communication diagnostic monitoring program that causes a computer to execute.
(Appendix 14)
An optical network using the optical communication device according to any one of appendices 1 to 11, and acquiring the diagnostic monitoring history collected in an empty area of the non-volatile memory when the optical communication device is activated. An optical communication system for performing diagnostic monitoring of the optical network.
(Appendix 15)
The optical communication system is a radio base station having a baseband unit and an RF (radio frequency) unit connected by optical communication, and at least one of the baseband unit and the RF unit is the optical communication device. The optical communication system according to appendix 14.
(Appendix 16)
The optical communication system according to appendix 14, wherein the optical communication system is a core network having a plurality of communication processing function units connected by optical communication, and at least one of the plurality of communication processing function units is the optical communication device. Communications system.
(Appendix 17)
15. The optical system according to appendix 14, wherein the optical communication system is a data center having a plurality of data processing function units connected by optical communication, and at least one of the plurality of data processing function units is the optical communication device. Communications system.

Claims (10)

In the optical communication, diagnostic monitoring means for diagnosing and monitoring the state of the optical module that mutually converts an optical signal and an electrical signal,
A non-volatile memory for storing the diagnostic monitoring result by the diagnostic monitoring means;
Collection means for collecting diagnostic monitoring history by selecting a predetermined diagnostic monitoring result from the diagnostic monitoring results and storing it in an empty area of the non-volatile memory,
An optical communication device comprising:
The collection of the diagnostic monitoring history by the collecting unit is a period longer than the diagnostic monitoring period by the diagnostic monitoring unit and capable of grasping the state transition of the optical module, and a period in which the processing of the optical communication device is not stressed. Tried in
The collecting means has a comparing means for comparing the specific information of the diagnostic monitoring result stored last time and the specific information of the new diagnostic monitoring result, and when the specific information does not match, the new diagnostic An optical communication device for storing a monitoring result in an empty area of the nonvolatile memory . When it is determined that there is no empty area of the non-volatile memory when the optical communication device is started , or when it is determined that the writing of the diagnostic monitoring history to the non-volatile memory is prohibited when the optical communication device is started In the case, the optical communication device according to claim 1 , further comprising output means for outputting the diagnostic monitoring history collected in the nonvolatile memory . And the output means, activation of the optical communication device may be restarted after a failure, outputs the diagnostic monitoring history collected in the nonvolatile memory via the developmental pathway of the disorder, according to claim 2 The optical communication device according to. The diagnostic monitoring history collected by the collecting means exchanges at least date and time information of collecting the diagnostic monitoring history, diagnostic information by the optical module selected from the diagnostic monitoring results, and an electric signal with the optical module. The optical communication device according to any one of claims 1 to 3 , further comprising: diagnostic information by an interface means; and monitoring information selected from the diagnostic monitoring results. The optical communication device according to claim 4, wherein the specific information is status information including the diagnostic information by the optical module and the diagnostic information by the interface unit. In the said diagnostic said optical module and the monitoring means and the nonvolatile memory, the collecting hand stage the control unit for controlling the optical module from the outside, the light according to any one of claims 1 to 5 Communication device.   The diagnostic monitoring unit has a digital diagnostic monitoring (DDM) function, and the nonvolatile memory is an EEPROM (Electrically Erasable Programmable Read-Only Memory) included in the optical module. 7. The empty area is a user writable area of the EEPROM, and the diagnostic monitoring history information includes information selected from a diagnostic monitoring information storage area of the EEPROM. The optical communication device described. In the optical communication, a diagnostic monitoring step for diagnostic monitoring of the state of the optical module that mutually converts an optical signal and an electrical signal,
A storage step of storing the diagnostic monitoring result by the diagnostic monitoring step in a non-volatile memory,
A collection step of collecting a diagnostic monitoring history by selecting a predetermined diagnostic monitoring result from the diagnostic monitoring results and storing it in an empty area of the nonvolatile memory;
An optical communication diagnostic and monitoring method for an optical communication device including:
The collection of the diagnostic monitoring history in the collecting step is a cycle longer than the diagnostic monitoring cycle in the diagnostic monitoring step and capable of grasping the state transition of the optical module, and a cycle not overwhelming the processing of the optical communication device. Tried in
The collecting step includes a comparing step of comparing the previously stored specific information of the diagnostic monitoring result with the specific information of the new diagnostic monitoring result, and when the specific information does not match, the new diagnostic monitoring is performed. An optical communication diagnostic monitoring method for storing the result in an empty area of the non-volatile memory . In the optical communication, a diagnostic monitoring step for diagnostic monitoring of the state of the optical module that mutually converts an optical signal and an electrical signal ,
A storage step of storing the diagnostic monitoring result by the diagnostic monitoring step in a non-volatile memory,
From the diagnostic monitoring result, by storing in the empty area of the non-volatile memory by selecting a predetermined diagnostic monitoring results, a collection step of collecting diagnostic monitoring history,
An optical communication diagnostic monitoring program for an optical communication device that causes a computer to execute:
The collection of the diagnostic monitoring history in the collecting step is a cycle longer than the diagnostic monitoring cycle in the diagnostic monitoring step and capable of grasping the state transition of the optical module, and a cycle not overwhelming the processing of the optical communication device. Tried in
The collecting step includes a comparing step of comparing the previously stored specific information of the diagnostic monitoring result with the specific information of the new diagnostic monitoring result, and when the specific information does not match, the new diagnostic monitoring is performed. An optical communication diagnostic monitoring program for storing the result in an empty area of the non-volatile memory .   An optical network using the optical communication device according to any one of claims 1 to 7, wherein the diagnostic monitoring history collected in an empty area of the nonvolatile memory is acquired when the optical communication device is activated. And an optical communication system for performing diagnostic monitoring of the optical network.

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