CN116760474B - Underwater middle-long distance optical communication system and self-adaptive control method thereof - Google Patents
Underwater middle-long distance optical communication system and self-adaptive control method thereof Download PDFInfo
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- CN116760474B CN116760474B CN202310854294.3A CN202310854294A CN116760474B CN 116760474 B CN116760474 B CN 116760474B CN 202310854294 A CN202310854294 A CN 202310854294A CN 116760474 B CN116760474 B CN 116760474B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 157
- 238000004891 communication Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000012937 correction Methods 0.000 claims abstract description 54
- 238000012544 monitoring process Methods 0.000 claims abstract description 40
- 230000003321 amplification Effects 0.000 claims abstract description 35
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 35
- 239000013307 optical fiber Substances 0.000 claims abstract description 17
- 230000035945 sensitivity Effects 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 230000008054 signal transmission Effects 0.000 claims 3
- 238000012423 maintenance Methods 0.000 abstract description 8
- 230000001276 controlling effect Effects 0.000 description 5
- 230000003044 adaptive effect Effects 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/293—Signal power control
- H04B10/2933—Signal power control considering the whole optical path
- H04B10/2939—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0793—Network aspects, e.g. central monitoring of transmission parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
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Abstract
The invention discloses an underwater medium-long distance optical communication system and a self-adaptive control method thereof, wherein the optical communication system comprises an optical amplification module, a signal forward error correction module and a monitoring and control module, the optical amplification module and the signal forward error correction module are sequentially and optically connected, the optical amplification module and the signal forward error correction module are interconnected with the monitoring and control module, the optical amplification module is externally connected with an external optical fiber link and then is in interconnection communication with a matched optical communication system, and the forward error correction module is in interconnection communication with an optical communication interface corresponding to external network switching equipment. The invention solves the problems of low reliability and high maintenance cost of the middle-long-distance underwater platform and the shore-based optical communication network.
Description
Technical Field
The invention relates to the technical field of wireless optical communication, in particular to an underwater medium-long distance optical communication system and a self-adaptive control method thereof.
Background
With the rapid development of economy and society, people are increasingly expanding in detection, development and utilization of ocean resources, various underwater detection and exploitation devices, underwater unmanned platforms and the like are deployed in a large quantity, and a data link between the underwater detection and exploitation devices and shore-based devices mainly adopts underwater optical fiber network communication, so that the method has important significance in civil and military directions. The optical fiber communication has wide application prospect in underwater communication due to the characteristics of high bandwidth, strong anti-interference capability and the like, and the requirements on the transmission distance and reliability of the optical fiber technology are also higher and higher.
The underwater optical fiber communication is limited by the transmitting and receiving power of the optical communication module, the short distance (less than or equal to 100 km) is directly interconnected by adopting the optical module, and the long distance (more than 300 km) is communicated by adopting an optical relay device embedded in a link (one optical relay is embedded every 70 km). However, in the middle-long distance communication of 100km-300km, the cost of using optical relay is too high, and communication is hardly possible without using optical relay. Therefore, the underwater optical communication technology within this distance is a problem to be solved by those skilled in the art.
Furthermore, in order to adapt to the attenuation of an optical device and the increase of the attenuation of an optical communication link caused by the maintenance of a marine optical cable, the transmission power and the receiving power of the optical device are reserved with too large allowance, and the optical module is in higher power, so that the service life and the heat dissipation face the test; the margin is reserved to be too small, although the power can be controlled, the service life is prolonged, once maintenance or aging of components of the system is carried out, the design of the margin is possibly exceeded, and the reliability of the system is reduced, so that how to design a device which can adaptively adjust the power of an optical module according to the change condition of an actual optical path, so as to achieve self-adaptive optical path loss and achieve automatic adjustment of the optical power, thereby achieving the balance of heat dissipation and service life, and becoming an important issue for developers in the industry.
Disclosure of Invention
First, the technical problem to be solved
Based on the problems, the invention provides an underwater medium-and-long-distance optical communication system and a self-adaptive control method thereof, which solve the problems of low reliability and high maintenance cost of a medium-and-long-distance underwater platform and a shore-based optical communication network.
(II) technical scheme
Based on the technical problems, the invention provides an underwater middle-long distance optical communication system, which comprises an optical amplification module, a signal forward error correction module and a monitoring and control module, wherein the optical amplification module is sequentially and optically connected with the signal forward error correction module, the optical amplification module and the signal forward error correction module are interconnected with the monitoring and control module, the optical amplification module is externally connected with an external optical fiber link and then is in interconnection communication with a matched optical communication system, and the forward error correction module is in interconnection communication with an optical communication interface corresponding to external network switching equipment; the optical amplifying module is used for receiving the optical signals input by the external optical fiber link and outputting the optical signals after amplifying the optical signals; the forward error correction module is used for detecting the error rate of the optical signal and reducing the error rate; the monitoring and control module carries out parameter configuration on the optical amplifying module and the signal forward error correction module according to a preset instruction, and balances the power consumption while guaranteeing low error rate.
Further, the optical amplifying module comprises a pre-amplifier module and an optical power amplifying module, which are both connected with the forward error correction module and an external optical fiber link; the pre-amplifier module is used for receiving an optical signal input by an external optical fiber link, improving the sensitivity of receiving equipment and inputting the optical signal to the signal forward error correction module; the optical power amplification module is used for receiving the optical signals output by the signal forward error correction module, improving the transmitting power of the output optical signals and outputting the amplified optical signals to the outside.
Further, the receiving power of the pre-amplifier module is from 10dBm to 19dBm.
Further, the emission power of the optical power amplification module is from-35 dBm to-10 dBm.
Further, the monitoring and control module sends down instructions according to the step length of 1dBm to adjust the pre-amplifier module and the optical power amplification module.
Further, the error rate detected by the signal forward error correction module is less than or equal to 10 -12 And the time is normal.
Further, the optical communication system further comprises a power supply module, wherein the power supply module provides power for all internal modules of the optical communication system, and the monitoring and control module controls the power switches of the optical amplifying module and the signal forward error correction module.
Furthermore, the monitoring and control module is built by adopting an FPGA platform.
The invention also discloses a self-adaptive control method of the underwater middle-distance optical communication system, which comprises the following steps:
s1, a monitoring and control module initially establishes all equipment and configures preset parameters according to preset instructions, and link detection is started after t1 time;
s2, judging whether the link state is normal, if so, detecting the error rate, and entering a step S4, otherwise, according to a preset instruction, increasing the transmitting power and the receiving sensitivity of the optical amplifying module according to a preset step length, and entering a step S3;
s3, judging whether the preset step length reaches a preset maximum value, if not, returning to the step S2 for judging again after the interval t2 until the link state is normal; if yes, returning to the initial value, and returning to the step S2 for judging again after the interval t 3;
s4, judging whether the error rate is zero, if so, not needing error correction processing, and entering a step S6; if not, entering step S5;
s5, judging whether the error rate is smaller than a preset value, if yes, performing error correction processing through a signal forward error correction module, and entering a step S6; otherwise, the monitoring and control module controls the optical amplification module, the transmitting power and the receiving sensitivity of the optical amplification module are improved according to a preset step length, and the step S2 is returned until the bit error rate is within a normal control range;
and S6, continuously monitoring the states and parameters of the modules by the monitoring and control module, and adjusting and controlling according to a preset instruction to complete the communication task.
Further, the t1 time is 5 minutes, the t2 time is 5 minutes, and the t3 time is 10 minutes.
(III) beneficial effects
The technical scheme of the invention has the following advantages:
(1) According to the underwater medium-long distance optical communication system, the monitoring and control module is used for detecting the transmitting power and the receiving sensitivity of the optical amplifying module, and the monitoring and control module is used for adjusting the preset step length to automatically adapt to the increase of the loss of an external optical link, so that the use scene of the underwater optical communication is more diversified, the adaptability is stronger, the control is more flexible, the underwater medium-long distance relay-free optical communication application is more convenient, the stable operation of communication equipment is ensured, and the requirements of part of the underwater medium-long distance optical communication application scenes with higher requirements on service life and reliability are met;
(2) The invention detects the error rate and reduces the error rate through the signal forward error correction module, and ensures the link stability while guaranteeing the low error rate, thereby ensuring the firmness and reliability of the whole optical link and improving the service quality of the optical communication;
(3) The optical amplifying module adopted by the invention can reduce the optical power allowance by controlling the receiving and transmitting power according to the characteristics of the optical link, and achieve the balance of power and service life, thereby prolonging the service life of the whole system;
(4) According to the invention, the parameter is adaptively adjusted through the monitoring and control module, the underwater equipment is not required to be salvaged, the parameter of the underwater optical communication equipment is not required to be manually adjusted, the adaptive parameter adjustment and the error correction processing of the signal forward error correction module reduce the times of fault components and manual maintenance, so that the maintenance cost is reduced, and the time cost is reduced.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and should not be construed as limiting the invention in any way, in which:
fig. 1 is a schematic structural diagram of an underwater mid-distance optical communication system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of an adaptive control method of an underwater mid-distance optical communication system according to an embodiment of the present invention.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
The embodiment of the invention relates to an underwater middle-long distance optical communication system, which is shown in figure 1 and comprises an optical amplification module, a signal forward error correction module, a monitoring and control module and a power supply module, wherein the optical amplification module is sequentially and optically connected with the signal forward error correction module, and the optical amplification module and the signal forward error correction module also lead out monitoring and control signals to be interconnected with the monitoring and control module; the optical amplification module externally leads out an optical signal connector, is connected with an external optical fiber link and then is in interconnection communication with a matched optical communication system, and the forward error correction module leads out the optical signal connector and is in interconnection communication with an optical communication interface corresponding to external network switching equipment; the optical amplifying module is used for receiving the optical signals input by the external optical fiber link and outputting the optical signals after amplifying the optical signals; the forward error correction module is used for detecting the error rate of the optical signal and reducing the error rate; the monitoring and control module carries out parameter configuration on the optical amplifying module and the signal forward error correction module according to a preset instruction, and balances the power consumption while guaranteeing low error rate.
The optical amplification module is internally integrated with a pre-amplifier module and an optical power amplification module, namely a PA module and a BA module, wherein the pre-amplifier module (PA module) is used for receiving an optical signal input by an external optical fiber link and improving the sensitivity of receiving equipment and inputting the optical signal to the signal forward error correction module, namely an FEC module, and the optical power amplification module (BA module) is used for receiving an optical signal output by the signal forward error correction module and improving the transmitting power of the output optical signal and outputting the amplified optical signal to the outside.
The pre-amplifier module (PA module) is suitable for receiving power from 10dBm to 19dBm, and can be regulated by the monitoring and control module according to a step length of 1 dBm; the optical power amplifying module (BA module) receives the optical signal input by the signal forward error correction module, improves the transmitting power of the output optical signal, and outputs the optical signal to an external optical fiber link, and the optical power amplifying module (BA module) is suitable for transmitting power from-35 dBm to-10 dBm and can be regulated by the monitoring and control module according to a step length of 1 dBm. The error rate detected by the signal forward error correction module is less than or equal to 10 -12 And the time is normal.
The monitoring and control module is built by adopting an FPGA platform and is used for receiving state information and working information of the optical amplification module and the signal forward error correction module, and carrying out state initialization setting and parameter issuing adjustment according to a preset instruction.
The power supply module provides stable power for each internal module, and the monitoring and control module can control the power switch of the optical amplifying module and the signal forward error correction module.
The embodiment of the invention also discloses a self-adaptive control method of the underwater middle-long distance optical communication system, as shown in figure 2, comprising the following steps:
s1, a monitoring and control module initially establishes all equipment and configures preset parameters according to preset instructions, and after 5 minutes, link detection is started;
s2, judging whether the link state is normal, if so, detecting the error rate, and entering a step S4, otherwise, according to a preset instruction, increasing the transmitting power and the receiving sensitivity of the optical amplifying module according to a preset step length, and entering a step S3;
if the link state is abnormal, the monitoring and control module sends down instruction adjustment according to the step length of 1dBm, and then judges the link state after the transmitting power and the receiving sensitivity of the optical amplifying module are improved.
S3, judging whether the preset step length reaches a preset maximum value, if not, returning to the step S2 to judge again after 5 minutes of interval until the link state is normal; if yes, returning to the initial value, and returning to the step S2 for judging again after 10 minutes;
when the preset step length reaches the preset maximum value, the transmitting power and the receiving sensitivity of the optical amplifying module reach the maximum value, if the link state is still abnormal at the moment, the initial value is returned, and the adjustment of the preset step length is carried out again; the receiving power of the pre-amplifier module (PA module) is from 10dBm to 19dBm, if the preset step length reaches the preset maximum value, the initial value is returned to be judged again.
And the steps S2-S3 are used for improving the transmitting power and the receiving sensitivity of the optical amplifying module by adjusting the preset step length, automatically adapting to the increase of the loss of an external optical link and ensuring the stable operation of the communication equipment.
S4, judging whether the error rate is zero, if so, not needing error correction processing; if not, entering step S5;
s5, judging whether the error rate is smaller than a preset value, if yes, performing error correction processing through a signal forward error correction module, otherwise, controlling an optical amplification module by a monitoring and control module, improving the transmitting power and the receiving sensitivity of the optical amplification module according to a preset step length, and returning to the step S2 until the error rate is in a normal control range;
and S4-S5, reducing the error rate by adjusting the preset step length, ensuring the stability of the link and simultaneously ensuring the low error rate, so that the whole optical link is firm and reliable, and the service quality of optical communication is improved.
And S6, continuously monitoring the states and parameters of the modules by the monitoring and control module, and adjusting and controlling according to a preset instruction to complete the communication task.
In summary, the underwater mid-distance optical communication system and the self-adaptive control method thereof have the following beneficial effects:
(1) According to the underwater medium-long distance optical communication system, the monitoring and control module is used for detecting the transmitting power and the receiving sensitivity of the optical amplifying module, and the monitoring and control module is used for adjusting the preset step length to automatically adapt to the increase of the loss of an external optical link, so that the use scene of the underwater optical communication is more diversified, the adaptability is stronger, the control is more flexible, the underwater medium-long distance relay-free optical communication application is more convenient, the stable operation of communication equipment is ensured, and the requirements of part of the underwater medium-long distance optical communication application scenes with higher requirements on service life and reliability are met;
(2) The invention detects the error rate and reduces the error rate through the signal forward error correction module, and ensures the link stability while guaranteeing the low error rate, thereby ensuring the firmness and reliability of the whole optical link and improving the service quality of the optical communication;
(3) The optical amplifying module adopted by the invention can reduce the optical power allowance by controlling the receiving and transmitting power according to the characteristics of the optical link, and achieve the balance of power and service life, thereby prolonging the service life of the whole system;
(4) According to the invention, the parameter is adaptively adjusted through the monitoring and control module, the underwater equipment is not required to be salvaged, the parameter of the underwater optical communication equipment is not required to be manually adjusted, the adaptive parameter adjustment and the error correction processing of the signal forward error correction module reduce the times of fault components and manual maintenance, so that the maintenance cost is reduced, and the time cost is reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.
Claims (1)
1. The self-adaptive control method of the underwater middle-long distance optical communication system is characterized in that the underwater middle-long distance optical communication system comprises an optical amplification module, a signal forward error correction module and a monitoring and control module, wherein the optical amplification module is sequentially and optically connected with the signal forward error correction module, the optical amplification module and the signal forward error correction module are interconnected with the monitoring and control module, the optical amplification module is externally connected with an external optical fiber link and then is in interconnection communication with a matched optical communication system, and the forward error correction module is in interconnection communication with an optical communication interface corresponding to external network switching equipment; the optical amplifying module is used for receiving the optical signals input by the external optical fiber link and outputting the optical signals after amplifying the optical signals; the forward error correction module is used for detecting the error rate of the optical signal and reducing the error rate; the monitoring and control module performs parameter configuration on the optical amplification module and the signal forward error correction module according to a preset instruction, so that the power consumption of the optical amplification module and the signal forward error correction module is balanced while the low error rate is ensured; the optical amplification module comprises a pre-amplifier module and an optical power amplification module which are both connected with the forward error correction module and an external optical fiber link; the pre-amplifier module is used for receiving an optical signal input by an external optical fiber link in a first signal transmission direction, improving the sensitivity of receiving equipment and inputting the optical signal to the signal forward error correction module; the optical power amplification module is used for receiving the optical signal output by the signal forward error correction module in a second signal transmission direction different from the first signal transmission direction, and is used for improving the transmitting power of the output optical signal, and outputting the amplified output optical signal; the receiving power of the pre-amplifier module is from 10dBm to 19dBm, and the transmitting power of the optical power amplifying module is from-35 dBm to-10 dBm; the monitoring and control module is built by adopting an FPGA platform; the monitoring and control module controls the power switch of the optical amplifying module and the signal forward error correction module;
the self-adaptive control method comprises the following steps:
s1, a monitoring and control module initially establishes all equipment and configures preset parameters according to preset instructions, and link detection is started after t1 time;
s2, judging whether the link state is normal, if so, detecting the error rate, and entering a step S4, otherwise, according to a preset instruction, increasing the transmitting power and the receiving sensitivity of the optical amplifying module according to a preset step length, and entering a step S3;
s3, judging whether the preset step length reaches a preset maximum value, if not, returning to the step S2 for judging again after the interval t2 until the link state is normal; if yes, returning to the initial value, and returning to the step S2 for judging again after the interval t 3;
s4, judging whether the error rate is zero, if so, not needing error correction processing, and entering a step S6; if not, entering step S5;
s5, judging whether the error rate is smaller than a preset value, if yes, performing error correction processing through a signal forward error correction module, and entering a step S6; otherwise, the monitoring and control module controls the optical amplification module, the transmitting power and the receiving sensitivity of the optical amplification module are improved according to a preset step length, and the step S2 is returned until the bit error rate is within a normal control range; the monitoring and control module adjusts the pre-amplifier module and the optical power amplification module according to a step length 1dBm downlink instruction; the error rate detected by the signal forward error correction module is less than or equal to 10 -12 The time is normal;
s6, the monitoring and control module continuously monitors the state and parameters of each module, and adjusts and controls according to preset instructions to complete communication tasks;
the t1 time is 5 minutes, the t2 time is 5 minutes, and the t3 time is 10 minutes.
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