CN1863015A - Return-to-zero code light transmitting system and regulating method of automatic optimizing of transmitting terminal performance - Google Patents
Return-to-zero code light transmitting system and regulating method of automatic optimizing of transmitting terminal performance Download PDFInfo
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- CN1863015A CN1863015A CNA2005100691759A CN200510069175A CN1863015A CN 1863015 A CN1863015 A CN 1863015A CN A2005100691759 A CNA2005100691759 A CN A2005100691759A CN 200510069175 A CN200510069175 A CN 200510069175A CN 1863015 A CN1863015 A CN 1863015A
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Abstract
The invention discloses the transmitting end capability automatic optimizing zero code light transferring system and the adjusting method, the said system includes the transmitting end, transferring circuit and the receiver, the receiver receives the signal send by the said transmitting end through the transferring line, the said receiving and the said transmitting end can receive the transmitting ordering information between the receiving cells through the ordering information channel, the said receiver is mounted with the signal testing cell; and the said receiver and the said transmitting end are mounted with the controlling cell separately; the said receiver connected with the light signal is tested by the signal testing cell, and the testing result can be delivered to the controlling cell of the said transmitting end, according to the instance of the testing feedback signal, the controlling cell of the transmitting end can send the controlling to the signal transmitting end to perform the optimizing adjusting of the light signal of the transmitting end. The invention has many merits such as the light adjusting ability, the realizing of the automatic controlling, the reducing the error code rate and the improvement of the reliability of the system.
Description
Technical field
The present invention relates to a kind of optical communication field optical transmission system and control method thereof, NRZ (RZ) optical transmission system of the transmitting terminal performance Automatic Optimal in particular a kind of optical communication field and the optimization of control method thereof.
Background technology
In the transmission system of optical communication, the system parameters that need consider comprises signal power, noise power and crosstalks.The error rate of wave division multiplexing WDM channel (BER) depends on the signal to noise ratio (snr) that is transferred to photodetector.And factors such as the power of signal, duty ratio affect the signal to noise ratio of signal.Therefore system is to the power of signal, and the isoparametric adjustment optimization of duty ratio is necessary, has low error rate to guarantee this system, can correct transmitting optical signal.
Some technology have adopted the automatic time delay compensation of RZ signal to the NRZ signal in the optical communication transmission system, but realize also not occurring in NRZ (RZ) the optical transmission system prior art of transmitting terminal performance Automatic Optimal by adjusting signal dutyfactor.
Using the RZ sign indicating number to carry out in the optical communication system of modulation transmissions,, the quality of system's received signal is changed if change the duty ratio of RZ sign indicating number.Difference because of the factors such as dispersion tolerance of circuit chromatic dispersion, nonlinear effect, noise, transmitter and receiver, RZ sign indicating number duty ratio corresponding to the systematic function of the best is different, in order to obtain best systematic function, can adjust the duty ratio of transmitting terminal signal.
Adjusting about duty ratio, patent WO03058854A1 has introduced the clock signal that how realizes EDM Generator of Adjustable Duty Ratio by the mode of regulating low bias current and zero direct voltage grade, shows by regulating bias current and direct voltage to realize adjusting to the light signal duty ratio.
Summary of the invention
The object of the present invention is to provide a kind of NRZ optical transmission system and control method of transmitting terminal performance Automatic Optimal, in order to reduce in the light communication system improperly optical signal power and duty ratio to the influence of the whole system error rate (BER), optimize the performance of communication transmission system, the present invention proposes a kind of by adjusting NRZ (RZ) optical transmission system and the control method of signal dutyfactor realization transmitting terminal performance Automatic Optimal.
Technical scheme of the present invention is:
A kind of NRZ optical transmission system of transmitting terminal performance Automatic Optimal, described system comprises transmitting terminal, transmission line and receiving terminal, receiving terminal receives the signal that described transmitting terminal sends by transmission line, wherein, also by signalling path route command transmitting between signaling receiving and transmission unit separately, described receiving terminal also is provided with detecting signal unit between described receiving terminal and the described transmitting terminal; And be respectively arranged with control unit at described receiving terminal and described transmitting terminal;
Described receiving terminal is received light signal and is detected by detecting signal unit, and testing result is sent to the control unit of described transmitting terminal, the control unit of transmitting terminal is according to the situation that detects feedback signal, sending controling instruction is given the signaling receiving and transmission unit of transmitting terminal, the signaling that the signaling receiving and transmission unit of transmitting terminal sends is sent to the signaling receiving and transmission unit of receiving terminal by the signalling path route, this signaling receiving and transmission unit receives the control unit that sends a signal to receiving terminal after the signaling, this control unit judges according to the signal that receives, and the signal transmitting terminal to system of transmitting control signal carries out the optimizing and revising of light signal of transmitting terminal.
Described equipment, wherein, described transmitting terminal also comprises laser, modulator, amplifier and NRZ/RZ change-over circuit;
Data-signal is input to the transmitting terminal of system, generates the RZ signal by described NRZ/RZ change-over circuit, and the RZ signal sends modulator to by the amplifier amplification, as the drive signal of modulator the laser signal that laser sends is modulated; As output, send the receiving terminal of system through the light signal of ovennodulation to by transmission line; Meanwhile, the control unit of described receiving terminal transmits control signal respectively to described modulator and described NRZ/RZ change-over circuit according to the state of the system signal of feedback, regulate with biasing modulator, realization is to the optical signal pulses duty cycle adjustment, with, the adjusting of NRZ/RZ change-over circuit is realized electric RZ signal pulse duty cycle adjustment.
Described system, wherein, described receiving terminal can be monitored BER and be detected; The Q value detects; Or FEC circuit BER counting.
Described system, wherein, the master controller of system is at receiving terminal, and receiving terminal sends control and requires to transmitting terminal.
Described system, wherein, the master controller of system is at transmitting terminal, and receiving terminal sends detection information to transmitting terminal.
Described system, wherein, the master controller of system is set to Centralized Controller, and receiving terminal sends detection information to Centralized Controller, and Centralized Controller sends control and requires to transmitting terminal.
A kind of control method of NRZ optical transmission system of described transmitting terminal performance Automatic Optimal, it may further comprise the steps: after receiving terminal carries out Performance Detection, testing result is sent to master controller, master controller will be regulated request through the signalling path route and send to transmitting terminal, transmitting terminal is accepted the instruction back and is regulated the RZ signal dutyfactor, reaches or crosses over certain threshold value up to the receiving terminal performance.
Described method, wherein, described duty ratio is optimized and revised process and also comprised: dutyfactor adjustment circuit at first writes down the duty ratio of current demand signal, and signal dutyfactor is adjusted to the initial position of median, receiving terminal detects once more signal and compares with the preceding situation of adjustment, if performance has the trend of optimization, adjust circuit and will further do the adjustment of adjusting signal dutyfactor in the same way with last time; If performance has the trend of deterioration, adjust circuit and will do the adjustment of adjusting reverse signal dutyfactor with last time; Repeat this process, in signal that receiving terminal receives has been adjusted to the amplitude of optimizing till.
Described method, wherein, described receiving terminal detects the parameter that signal carries out BER or Q value or FEC circuit BER counting, and compares with pre-set threshold.
The NRZ optical transmission system and the control method of a kind of transmitting terminal performance Automatic Optimal provided by the present invention, owing to adopt above technical scheme, thereby have following advantage: the optical property regulating power is arranged, realize control automatically; Reduce the error rate, improved the reliability of system.
Description of drawings
Fig. 1 is the schematic diagram of NRZ (RZ) optical transmission system of transmitting terminal performance Automatic Optimal of the present invention;
Fig. 2 is the transmitting terminal structural representation of NRZ (RZ) optical transmission system of transmitting terminal performance Automatic Optimal of the present invention;
Fig. 3 is that performance Automatic Optimal system signal duty ratio of the present invention is adjusted the control procedure schematic diagram;
Wherein, the meaning of each label is: 1 Laser Drive signal; 2 modulator driving signals; 3 modulator bias-adjusted (optical signal pulses duty cycle adjustment); 4 electric RZ signal pulse duty cycle adjustment.
Embodiment
Below will be by description, so that technical scheme of the present invention and beneficial effect thereof are comparatively easily seen to preferred embodiment of the present invention.
The NRZ optical transmission system of a kind of transmitting terminal performance Automatic Optimal of the present invention, as shown in Figure 1, comprise that transmitting terminal, transmission line, receiving terminal, detecting signal unit, control unit A, control unit B, signaling receiving and transmission unit A1, B1 and signalling path route constitute.The light transmitting terminal sends light signal, is sent to receiving terminal by optical transmission line.
Receiving terminal is received light signal and is detected by detecting signal unit, and testing result sent to control unit A, control unit A is according to the situation of the feedback signal that detects, sending controling instruction is given signaling receiving and transmission unit A, the signaling that signaling receiving and transmission unit A sends is sent to the signaling receiving and transmission unit B by the signalling path route, the signaling receiving and transmission unit B receives signaling, and send a signal to control unit B, control unit B judges according to the signal that receives, and the signal transmitting terminal to system of transmitting control signal carries out the optimizing and revising of light signal of transmitting terminal.
The possible embodiment of receiving terminal comprises: BER detects; The Q value detects; FEC circuit BER counting.
The transmitting terminal of system of the present invention is made of laser LASER, modulator M, amplifier A and NRZ/RZ change-over circuit, as shown in Figure 2.Wherein: 1 Laser Drive signal; 2 modulator driving signals; 3 modulator bias-adjusted (optical signal pulses duty cycle adjustment); 4 electric RZ signal pulse duty cycle adjustment.
Data-signal is input to the transmitting terminal of system, generates the RZ signal by the NRZ/RZ change-over circuit, and the RZ signal sends modulator to by the amplifier amplification, as the drive signal of modulator the laser signal that laser sends is modulated.As output, send the receiving terminal of system through the light signal of ovennodulation to by transmission line.Meanwhile, control unit B transmits control signal 3 and 4 respectively according to the state of the system signal of feedback.The biasing of 3 pairs of modulators of control signal is regulated, to realize the optical signal pulses duty cycle adjustment; Control signal 4 has realized electric RZ signal pulse duty cycle adjustment by the adjusting to the NRZ/RZ change-over circuit.
The possible embodiment of transmitting terminal comprises: the signal of telecommunication duty of ratio of regulating the output of ERZ circuit; The biasing of regulating optical modulator changes the duty ratio of optical signal pulses.
After the receiving terminal of system of the present invention carries out Performance Detection, testing result is sent to controller, controller will be regulated request through signalling route (or monitor channel route) and send to transmitting terminal, transmitting terminal is accepted the instruction back and is regulated the RZ signal dutyfactor, reaches or crosses over certain threshold value up to the receiving terminal performance.
The embodiment of control system comprises: master controller is at receiving terminal, and receiving terminal sends control and requires to transmitting terminal; Master controller is at transmitting terminal, and receiving terminal sends detection information to transmitting terminal; Receiving terminal sends detection information to Centralized Controller, and Centralized Controller sends control and requires to transmitting terminal.
The embodiment of described signaling transmission comprises: in-band signalling; Out-of-band signalling.
Described optical transmission system of the present invention is applicable to the optical transmission system of single wavelength, and also applicable to the optical transmission system of multi-wavelength multiplex, one or more therein optical channels are used this device.
The method of system function optimization of the present invention, as shown in Figure 3, comprise: after receiving terminal carries out Performance Detection, testing result is sent to controller, controller will be regulated request through signalling route (or monitor channel route) and send to transmitting terminal, transmitting terminal is accepted the instruction back and is regulated the RZ signal dutyfactor, reaches or crosses over certain threshold value up to the receiving terminal performance.
The flow process that describes a system signal optimal control in detail shown in Figure 3.Receiving terminal carries out BER or Q value or FEC circuit BER to signal and counts isoparametric detection, and compares with pre-set threshold.If the BER value of system is higher than preset threshold, then send optimization request to master control system, master control system is transmitted by signaling, starts duty ratio and optimizes and revises circuit.Dutyfactor adjustment circuit at first writes down the duty ratio of current demand signal, and signal dutyfactor adjusted to initial position (median), receiving terminal detects once more signal and compares with the preceding situation of adjustment, if performance has the trend of optimization, adjust circuit and will further do the adjustment of adjusting signal dutyfactor in the same way with last time; If performance has the trend of deterioration, adjust circuit and will do the adjustment of adjusting reverse signal dutyfactor with last time.This process repeats repeatedly, in signal that receiving terminal receives has been adjusted to the amplitude of optimizing till.
The regulative mode of duty ratio also adopts other mode, is not limited to this embodiment.Should be understood that scope of patent protection of the present invention is not limited to the foregoing description, and should be as the criterion with claims.
Claims (9)
1, a kind of NRZ optical transmission system of transmitting terminal performance Automatic Optimal, described system comprises transmitting terminal, transmission line and receiving terminal, receiving terminal receives the signal that described transmitting terminal sends by transmission line, it is characterized in that, also by signalling path route command transmitting between signaling receiving and transmission unit separately, described receiving terminal also is provided with detecting signal unit between described receiving terminal and the described transmitting terminal; And be respectively arranged with control unit at described receiving terminal and described transmitting terminal;
Described receiving terminal is received light signal and is detected by detecting signal unit, and testing result is sent to the control unit of described transmitting terminal, the control unit of transmitting terminal is according to the situation that detects feedback signal, sending controling instruction is given the signaling receiving and transmission unit of transmitting terminal, the signaling that the signaling receiving and transmission unit of transmitting terminal sends is sent to the signaling receiving and transmission unit of receiving terminal by the signalling path route, this signaling receiving and transmission unit receives the control unit that sends a signal to receiving terminal after the signaling, this control unit judges according to the signal that receives, and the signal transmitting terminal to system of transmitting control signal carries out the optimizing and revising of light signal of transmitting terminal.
2, equipment according to claim 1 is characterized in that, described transmitting terminal also comprises laser, modulator, amplifier and NRZ/RZ change-over circuit;
Data-signal is input to the transmitting terminal of system, generates the RZ signal by described NRZ/RZ change-over circuit, and the RZ signal sends modulator to by the amplifier amplification, as the drive signal of modulator the laser signal that laser sends is modulated; As output, send the receiving terminal of system through the light signal of ovennodulation to by transmission line; Meanwhile, the control unit of described receiving terminal transmits control signal respectively to described modulator and described NRZ/RZ change-over circuit according to the state of the system signal of feedback, regulate with biasing modulator, realization is to the optical signal pulses duty cycle adjustment, with, the adjusting of NRZ/RZ change-over circuit is realized electric RZ signal pulse duty cycle adjustment.
3, system according to claim 2 is characterized in that, described receiving terminal can be monitored BER and be detected; The Q value detects; Or FEC circuit BER counting.
4, system according to claim 2 is characterized in that, the master controller of system is at receiving terminal, and receiving terminal sends control and requires to transmitting terminal.
5, system according to claim 2 is characterized in that, the master controller of system is at transmitting terminal, and receiving terminal sends detection information to transmitting terminal.
6, system according to claim 2 is characterized in that, the master controller of system is set to Centralized Controller, and receiving terminal sends detection information to Centralized Controller, and Centralized Controller sends control and requires to transmitting terminal.
7, a kind of control method of NRZ optical transmission system of transmitting terminal performance Automatic Optimal as claimed in claim 1, it may further comprise the steps: after receiving terminal carries out Performance Detection, testing result is sent to master controller, master controller will be regulated request through the signalling path route and send to transmitting terminal, transmitting terminal is accepted the instruction back and is regulated the RZ signal dutyfactor, reaches or crosses over certain threshold value up to the receiving terminal performance.
8, method according to claim 7, it is characterized in that, described duty ratio is optimized and revised process and also comprised: dutyfactor adjustment circuit at first writes down the duty ratio of current demand signal, and signal dutyfactor is adjusted to the initial position of median, receiving terminal detects once more signal and compares with the preceding situation of adjustment, if performance has the trend of optimization, adjust circuit and will further do the adjustment of adjusting signal dutyfactor in the same way with last time; If performance has the trend of deterioration, adjust circuit and will do the adjustment of adjusting reverse signal dutyfactor with last time; Repeat this process, in signal that receiving terminal receives has been adjusted to the amplitude of optimizing till.
9, method according to claim 8 is characterized in that, described receiving terminal detects the parameter that signal carries out BER or Q value or FEC circuit BER counting, and compares with pre-set threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100691759A CN1863015A (en) | 2005-05-12 | 2005-05-12 | Return-to-zero code light transmitting system and regulating method of automatic optimizing of transmitting terminal performance |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2005100691759A CN1863015A (en) | 2005-05-12 | 2005-05-12 | Return-to-zero code light transmitting system and regulating method of automatic optimizing of transmitting terminal performance |
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| CN1863015A true CN1863015A (en) | 2006-11-15 |
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| CNA2005100691759A Pending CN1863015A (en) | 2005-05-12 | 2005-05-12 | Return-to-zero code light transmitting system and regulating method of automatic optimizing of transmitting terminal performance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101515828B (en) * | 2008-02-22 | 2011-10-26 | 华为技术有限公司 | optical transmitter, optical transmission method and optical transmission system |
| CN112039598A (en) * | 2020-08-12 | 2020-12-04 | 烽火通信科技股份有限公司 | Channel power automatic search adjustment method and system based on bit error rate |
| CN115065857A (en) * | 2022-08-17 | 2022-09-16 | 深圳市品为科技有限公司 | High-definition multimedia interface optical fiber transmission device |
-
2005
- 2005-05-12 CN CNA2005100691759A patent/CN1863015A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101515828B (en) * | 2008-02-22 | 2011-10-26 | 华为技术有限公司 | optical transmitter, optical transmission method and optical transmission system |
| CN112039598A (en) * | 2020-08-12 | 2020-12-04 | 烽火通信科技股份有限公司 | Channel power automatic search adjustment method and system based on bit error rate |
| CN112039598B (en) * | 2020-08-12 | 2022-01-07 | 烽火通信科技股份有限公司 | Channel power automatic search adjustment method and system based on bit error rate |
| CN115065857A (en) * | 2022-08-17 | 2022-09-16 | 深圳市品为科技有限公司 | High-definition multimedia interface optical fiber transmission device |
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Open date: 20061115 |