CN110138449A - A kind of vehicle electronics communication system based on fiber optic communication - Google Patents
A kind of vehicle electronics communication system based on fiber optic communication Download PDFInfo
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- CN110138449A CN110138449A CN201910404737.2A CN201910404737A CN110138449A CN 110138449 A CN110138449 A CN 110138449A CN 201910404737 A CN201910404737 A CN 201910404737A CN 110138449 A CN110138449 A CN 110138449A
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- 238000004891 communication Methods 0.000 title claims abstract description 43
- 239000000835 fiber Substances 0.000 title abstract 2
- 230000003287 optical effect Effects 0.000 claims abstract description 100
- 239000013307 optical fiber Substances 0.000 claims abstract description 31
- 238000012423 maintenance Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 9
- 238000010977 unit operation Methods 0.000 claims description 9
- 230000011664 signaling Effects 0.000 claims description 7
- 230000001934 delay Effects 0.000 claims description 6
- 238000011156 evaluation Methods 0.000 claims description 6
- 230000004927 fusion Effects 0.000 claims description 6
- 238000013058 risk prediction model Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000012502 risk assessment Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 108010076504 Protein Sorting Signals Proteins 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
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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
- H04B10/0795—Performance monitoring; Measurement 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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
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- Computer Networks & Wireless Communication (AREA)
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- Optical Communication System (AREA)
Abstract
The vehicle electronics communication system based on fiber optic communication that the present invention relates to a kind of, what is solved is the low technical problem of confidentiality, it include two optical transceivers combination in parallel by using the vehicle electronics communication system, optical transceiver combination includes a light sender and corresponding photoreceiver, and identical optical-fibre channel is applied in combination in two optical transceivers；The unification of described two optical transceiver groups is combined for optical transceiver, another is combined for optical transceiver, the combination of key light transceiver with for optical transceiver combine between be connected with control processor；The control processor is built-in with timer and coordinates to transmit program；Technical solution, preferably resolve the problem, can be used for vehicle electronics communication in.
Description
Technical Field
The invention relates to the field of optical communication, in particular to a vehicle-mounted electronic communication system based on optical fiber communication.
Background
A communication system is a generic term for a technical system for performing an information transmission process. Modern communication systems are implemented primarily by means of propagation of electromagnetic waves in free space, known as wireless communication systems, or transmission mechanisms in a guided medium, known as wired communication systems. Optical fiber communications (optical fiber communications) stands out from optical communications, has become one of the main pillars of modern communications, and plays a very important role in modern telecommunication networks. As an emerging technology, optical fiber communication has a fast development speed in recent years, and a wide application range, which is rare in communication history, is also an important mark of the world new technology revolution and a main transmission tool of various information in the future information society.
The invention provides a vehicle-mounted electronic communication system based on optical fiber communication, which is used for solving the technical problem of confidentiality.
Disclosure of Invention
The technical problem to be solved by the invention is the technical problem of low security in the prior art. The vehicle-mounted electronic communication system based on the optical fiber communication has the characteristic of high confidentiality.
In order to solve the technical problems, the technical scheme is as follows:
a vehicle-mounted electronic communication system based on optical fiber communication comprises two optical transceiver combinations which are connected in parallel, wherein each optical transceiver combination comprises an optical transceiver and a corresponding optical receiver, and the two optical transceiver combinations use the same optical fiber channel; one of the two optical transceiver combinations is an optical transceiver combination, the other one is an optical transceiver combination, and a control processor is connected between the main optical transceiver combination and the standby optical transceiver combination;
a timer and a coordination signaling program are arranged in the control processor;
the control processor executes a coordinating signaling program to perform the following steps:
step 1, controlling a standby optical transmitter to perform optical fiber channel time delay test by a control processor, wherein the test result is T1;
step 2, the control processor controls the backup optical transmitter to set a timer to be T1/2;
step 3, controlling a standby transmitter to randomly generate a standby optical signal representing a main optical signal parameter sequence, encoding and generating the main optical signal according to the main optical signal parameter sequence, and transmitting the standby optical signal representing the main optical signal parameter sequence to an optical fiber channel after the standby optical transmitter delays T1/2;
and 4, repeating the step 1 to the step 3.
The working principle of the invention is as follows: according to the invention, through testing of time delay of the optical fiber channel, when an optical signal is transmitted, the optical parameter sequence is transmitted by the backup optical transmitter, the main optical transmitter generates an optical signal according to the optical parameter sequence after corresponding time delay and transmits the optical signal through the optical fiber channel, and the decoding end demodulates the received optical signal sequence and the optical parameter sequence after T1/2, so that the confidentiality and the real-time property are improved.
In the foregoing solution, for optimization, further, the parameter of the main light signal is a period of the main light signal.
Further, the spare optical signal is encoded before being transmitted, including:
step A, modulating received optical signal data by adopting a DQPSK modulation method, and outputting two paths of high-speed electric signals;
b, constructing a DSP processor array to receive the high-speed electric signals in the step A; the DSP processor array comprises DSP processor units with different rates, and the DSP processor units in the DSP processor array are marked according to the different rates, wherein the marks comprise rate marks and sequence marks;
and step C, performing operation risk evaluation on the DSP processor units in the DSP processor array, and performing self-adaptive selection on the DSP processor units according to the evaluation result to construct a DSP processor working array which accords with the electric signal rate.
The invention adaptively selects the DSP processor unit matched with the rate of the received electric signal to work by setting the DSP processor array comprising a plurality of DSP processor units with different rates. Meanwhile, the operation risk of the DSP processor unit can be evaluated, the DSP processor unit which works on line is replaced, and a DSP processor working array with high efficiency and safety is constructed.
Further, the DQPSK modulation method is incoherent DQPSK modulation, and includes:
step A.1, carrying out DPSK modulation on a standby optical signal, and equally dividing the modulated DPSK signal into 4 paths through four paths of equal power dividers;
step A.2, defining the time delays of four paths of outputs of the four paths of equal power dividers as 0, T, T and 2T respectively; inputting the time delay of 0 and the time delay of T into a first 3dB coupler, and inputting the time delay of T and the time delay of 2T into a second 3dB coupler;
step A.3, the first 3dB coupler and the second 3dB coupler respectively carry out adjacent period interference, logic output 1 is carried out when the adjacent period phases are the same, and logic output 0 is carried out when the phase difference is 180 degrees;
step A.4, using a balanced receiver to receive adjacent period interference results of a first 3dB coupler and a second 3dB coupler, carrying out photoelectric conversion on the adjacent period interference results, and then carrying out parity comparison;
and step A.5, defining the error rate by comparing the parity with the probability of different numbers.
The modulation method used by the invention is based on DPSK modulation, and uses parity comparison to check the error rate in a mode of checking errors, and simultaneously uses the error rate as one of the parameters of feedback control time delay.
Further, the performing operation risk assessment includes constructing an operation risk estimation program by using the operation time and the single operation time as basic variables, including:
step a, establishing a DSP processor unit operation risk prediction model;
wherein n is a positive integer and represents the number of sub-modules of the DSP processor unit, and i is less than or equal toPositive integer of n, PiIs a risk threshold value of a submodule of a DSP processor unit, CxPyramid is fused for the coefficient factor function of each DSP processor unit sub-module,the failure rate of the submodule of the DSP processor unit is counted according to history;
b, constructing a coefficient factor function according to preset running time, single running time, initial state, maintenance times and maintenance time:
wherein,for values of the running time of the submodule of the DSP processor unit,for the value of the single running time of the risk point of the sub-module running of the DSP processor unit,fitting values for the initial state of the DSP processor unit,maintenance parameter value, theta, fitting for maintenance times and maintenance times of sub-modules of DSP processor unit1Is composed ofIndex parameter of (a), theta2Is composed ofIndex parameter of (a), theta3Is composed ofIs referred to asNumber parameter, θ4Is composed ofThe index parameter of (1);
step c, normalizing the coefficient factor function of the step b to obtain:
wherein N is the number of risk points of DSP processor unit operation, and epsilon isA constant other than 0;
step d, calculating a weighted Gaussian pyramid according to the normalized coefficient factor function in the step e, defining a Laplacian pyramid of equipment risk and a detail gain item, and calculating a coefficient factor function fusion pyramid as CxAnd inputting the fusion pyramid into a DSP unit operation risk prediction model to obtain a DSP operation risk result.
The invention has the beneficial effects that: according to the invention, through testing of time delay of the optical fiber channel, when the optical signal is transmitted, the optical parameter sequence is transmitted by the standby optical transmitter, the optical signal generated according to the optical parameter sequence after the corresponding time delay is performed by the main optical transmitter is transmitted through the optical fiber channel, and the decoding end is modulated according to the optical signal sequence and the optical parameter sequence received at the same time, so that the confidentiality and the real-time property are improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic diagram of a vehicle-mounted electronic communication system based on optical fiber communication in embodiment 1.
Fig. 2 is a schematic diagram of a coordinating signaling procedure in embodiment 1.
Fig. 3 is a schematic diagram of a DQPSK modulation method in embodiment 1.
Fig. 4 is a schematic diagram of the encoding of the spare signal in embodiment 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The present embodiment provides a vehicle-mounted electronic communication system based on optical fiber communication, as shown in fig. 1, the vehicle-mounted electronic communication system includes two optical transceiver combinations connected in parallel, where the optical transceiver combination includes an optical transmitter and a corresponding optical receiver, and the two optical transceiver combinations use the same optical fiber channel; one of the two optical transceiver combinations is an optical transceiver combination, the other one is an optical transceiver combination, and a control processor is connected between the main optical transceiver combination and the standby optical transceiver combination;
a timer and a coordination signaling program are arranged in the control processor;
the control processor executes a coordinating signaling procedure, as shown in fig. 2, to perform the following steps:
step 1, controlling a standby optical transmitter to perform optical fiber channel time delay test by a control processor, wherein the test result is T1;
step 2, the control processor controls the backup optical transmitter to set a timer to be T1/2;
step 3, controlling a standby transmitter to randomly generate a standby optical signal representing a main optical signal parameter sequence, encoding and generating the main optical signal according to the main optical signal parameter sequence, and transmitting the standby optical signal representing the main optical signal parameter sequence to an optical fiber channel after the standby optical transmitter delays T1/2;
and 4, repeating the step 1 to the step 3.
In the embodiment, through testing of the time delay of the optical fiber channel, when an optical signal is transmitted, the optical parameter sequence is transmitted by the standby optical transmitter, the optical signal generated according to the optical parameter sequence after the corresponding time delay is transmitted by the main optical transmitter through the optical fiber channel, and the received optical signal sequence and the optical parameter sequence after T1/2 are demodulated by the decoding end, so that the confidentiality and the real-time performance are improved.
Specifically, the main light signal parameter is a main light signal period. But also phase, frequency, etc.
Preferably, the encoding of the backup signal prior to transmission of the backup optical signal is used to further improve privacy, as shown in fig. 4, comprising:
step A, modulating received optical signal data by adopting a DQPSK modulation method, and outputting two paths of high-speed electric signals;
b, constructing a DSP processor array to receive the high-speed electric signals in the step A; the DSP processor array comprises DSP processor units with different rates, and the DSP processor units in the DSP processor array are marked according to the different rates, wherein the marks comprise rate marks and sequence marks;
and step C, performing operation risk evaluation on the DSP processor units in the DSP processor array, and performing self-adaptive selection on the DSP processor units according to the evaluation result to construct a DSP processor working array which accords with the electric signal rate.
In the embodiment, by arranging the DSP processor array including a plurality of DSP processor units with different rates, the DSP processor unit matched with the rate of the received electrical signal is adaptively selected to operate. Meanwhile, the operation risk of the DSP processor unit can be evaluated, the DSP processor unit which works on line is replaced, and a DSP processor working array with high efficiency and safety is constructed.
Preferably, the DQPSK modulation method is non-coherent DQPSK modulation, as shown in fig. 3, and includes:
step A.1, carrying out DPSK modulation on a standby optical signal, and equally dividing the modulated DPSK signal into 4 paths through four paths of equal power dividers;
step A.2, defining the time delays of four paths of outputs of the four paths of equal power dividers as 0, T, T and 2T respectively; inputting the time delay of 0 and the time delay of T into a first 3dB coupler, and inputting the time delay of T and the time delay of 2T into a second 3dB coupler;
step A.3, the first 3dB coupler and the second 3dB coupler respectively carry out adjacent period interference, logic output 1 is carried out when the adjacent period phases are the same, and logic output 0 is carried out when the phase difference is 180 degrees;
step A.4, using a balanced receiver to receive adjacent period interference results of a first 3dB coupler and a second 3dB coupler, carrying out photoelectric conversion on the adjacent period interference results, and then carrying out parity comparison;
and step A.5, defining the error rate by comparing the parity with the probability of different numbers.
The modulation method used by the invention is based on DPSK modulation, and uses parity comparison to check the error rate in a mode of checking errors, and simultaneously uses the error rate as one of the parameters of feedback control time delay.
Further, the performing operation risk assessment includes constructing an operation risk estimation program by using the operation time and the single operation time as basic variables, including:
step a, establishing a DSP processor unit operation risk prediction model;
wherein n is a positive integer representing the number of DSP processor unit sub-modules, i is a positive integer not more than n, PiIs a risk threshold value of a submodule of a DSP processor unit, CxPyramid is fused for the coefficient factor function of each DSP processor unit sub-module,the failure rate of the submodule of the DSP processor unit is counted according to history;
b, constructing a coefficient factor function according to preset running time, single running time, initial state, maintenance times and maintenance time:
wherein,for values of the running time of the submodule of the DSP processor unit,for the value of the single running time of the risk point of the sub-module running of the DSP processor unit,fitting values for the initial state of the DSP processor unit,maintenance parameter value, theta, fitting for maintenance times and maintenance times of sub-modules of DSP processor unit1Is composed ofIndex parameter of (a), theta2Is composed ofIndex parameter of (a), theta3Is composed ofIndex parameter of (a), theta4Is composed ofThe index parameter of (1);
step c, normalizing the coefficient factor function of the step b to obtain:
wherein N is the number of risk points of DSP processor unit operation, and epsilon isA constant other than 0;
step d, calculating a weighted Gaussian pyramid according to the normalized coefficient factor function in the step e, defining a Laplacian pyramid of equipment risk and a detail gain item, and calculating a coefficient factor function fusion pyramid as CxAnd inputting the fusion pyramid into a DSP unit operation risk prediction model to obtain a DSP operation risk result.
Although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.
Claims (5)
1. The utility model provides a vehicle-mounted electronic communication system based on optical fiber communication which characterized in that: the vehicle-mounted electronic communication system comprises two optical transceiver combinations which are connected in parallel, wherein each optical transceiver combination comprises an optical transceiver and a corresponding optical receiver, and the two optical transceiver combinations use the same optical fiber channel; one of the two optical transceiver combinations is an optical transceiver combination, the other one is an optical transceiver combination, and a control processor is connected between the main optical transceiver combination and the standby optical transceiver combination;
a timer and a coordination signaling program are arranged in the control processor;
the control processor executes a coordinating signaling program to perform the following steps:
step 1, controlling a standby optical transmitter to perform optical fiber channel time delay test by a control processor, wherein the test result is T1;
step 2, the control processor controls the backup optical transmitter to set a timer to be T1/2;
step 3, controlling a standby transmitter to randomly generate a standby optical signal representing a main optical signal parameter sequence, encoding and generating the main optical signal according to the main optical signal parameter sequence, and transmitting the standby optical signal representing the main optical signal parameter sequence to an optical fiber channel after the standby optical transmitter delays T1/2;
and 4, repeating the step 1 to the step 3.
2. The vehicle-mounted electronic communication system based on optical fiber communication according to claim 1, wherein: the main light signal parameter is a main light signal period.
3. The vehicle-mounted electronic communication system based on optical fiber communication according to claim 2, wherein: spare optical signal encoding prior to transmission, comprising:
step A, modulating received optical signal data by adopting a DQPSK modulation method, and outputting two paths of high-speed electric signals;
b, constructing a DSP processor array to receive the high-speed electric signals in the step A; the DSP processor array comprises DSP processor units with different rates, and the DSP processor units in the DSP processor array are marked according to the different rates, wherein the marks comprise rate marks and sequence marks;
and step C, performing operation risk evaluation on the DSP processor units in the DSP processor array, and performing self-adaptive selection on the DSP processor units according to the evaluation result to construct a DSP processor working array which accords with the electric signal rate.
4. The vehicle-mounted electronic communication system based on optical fiber communication according to claim 3, wherein: the DQPSK modulation method is incoherent DQPSK modulation and comprises the following steps:
step A.1, carrying out DPSK modulation on a standby optical signal, and equally dividing the modulated DPSK signal into 4 paths through four paths of equal power dividers;
step A.2, defining the time delays of four paths of outputs of the four paths of equal power dividers as 0, T, T and 2T respectively; inputting the time delay of 0 and the time delay of T into a first 3dB coupler, and inputting the time delay of T and the time delay of 2T into a second 3dB coupler;
step A.3, the first 3dB coupler and the second 3dB coupler respectively carry out adjacent period interference, logic output 1 is carried out when the adjacent period phases are the same, and logic output 0 is carried out when the phase difference is 180 degrees;
step A.4, using a balanced receiver to receive adjacent period interference results of a first 3dB coupler and a second 3dB coupler, carrying out photoelectric conversion on the adjacent period interference results, and then carrying out parity comparison;
and step A.5, defining the error rate by comparing the parity with the probability of different numbers.
5. The vehicle-mounted electronic communication system based on optical fiber communication according to claim 3, wherein: the operation risk assessment comprises an operation risk estimation program which is formed by taking operation time and single operation time as basic variables, and comprises the following steps:
step a, establishing a DSP processor unit operation risk prediction model;
wherein n is a positive integer representing the number of DSP processor unit sub-modules, i is a positive integer not more than n, PiIs a risk threshold value of a submodule of a DSP processor unit, CxPyramid is fused for the coefficient factor function of each DSP processor unit sub-module,according to historyCounting the fault rate of sub-modules of the DSP processor unit;
b, constructing a coefficient factor function according to preset running time, single running time, initial state, maintenance times and maintenance time:
wherein,for values of the running time of the submodule of the DSP processor unit,for the value of the single running time of the risk point of the sub-module running of the DSP processor unit,fitting values for the initial state of the DSP processor unit,maintenance parameter value, theta, fitting for maintenance times and maintenance times of sub-modules of DSP processor unit1Is composed ofIndex parameter of (a), theta2Is composed ofIndex parameter of (a), theta3Is composed ofIndex parameter of (a), theta4Is composed ofThe index parameter of (1);
step c, normalizing the coefficient factor function of the step b to obtain:
wherein N is the number of risk points of DSP processor unit operation, and epsilon isA constant other than 0;
step d, calculating a weighted Gaussian pyramid according to the normalized coefficient factor function in the step e, defining a Laplacian pyramid of equipment risk and a detail gain item, and calculating a coefficient factor function fusion pyramid as CxAnd inputting the fusion pyramid into a DSP unit operation risk prediction model to obtain a DSP operation risk result.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04304741A (en) * | 1991-04-01 | 1992-10-28 | Nippon Telegr & Teleph Corp <Ntt> | Optical communication equipment |
| CN201667657U (en) * | 2010-04-14 | 2010-12-08 | 东南大学 | Optical transceiver module protective type optical line terminal of wavelength division multiplexed passive optical network |
| CN106788849A (en) * | 2016-12-30 | 2017-05-31 | 北京信息科学技术研究院 | A kind of delay compensation method for adaptive optic fiber length in quantum key dispatching system |
| CN109428665A (en) * | 2017-08-22 | 2019-03-05 | 中国电信股份有限公司 | Wavelength-division multiplex sending device, receiving device, trunking and Transmission system |
| CN208638376U (en) * | 2018-08-28 | 2019-03-22 | 中国银行股份有限公司 | A kind of telecommunication transmission system based on quantum wavelength-division multiplex |
-
2019
- 2019-05-15 CN CN201910404737.2A patent/CN110138449A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04304741A (en) * | 1991-04-01 | 1992-10-28 | Nippon Telegr & Teleph Corp <Ntt> | Optical communication equipment |
| CN201667657U (en) * | 2010-04-14 | 2010-12-08 | 东南大学 | Optical transceiver module protective type optical line terminal of wavelength division multiplexed passive optical network |
| CN106788849A (en) * | 2016-12-30 | 2017-05-31 | 北京信息科学技术研究院 | A kind of delay compensation method for adaptive optic fiber length in quantum key dispatching system |
| CN109428665A (en) * | 2017-08-22 | 2019-03-05 | 中国电信股份有限公司 | Wavelength-division multiplex sending device, receiving device, trunking and Transmission system |
| CN208638376U (en) * | 2018-08-28 | 2019-03-22 | 中国银行股份有限公司 | A kind of telecommunication transmission system based on quantum wavelength-division multiplex |
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