CN102832996A - Constant emitting detecting and overcoming method and device of optical module in EPON (Ethernet Passive Optical Network) - Google Patents
Constant emitting detecting and overcoming method and device of optical module in EPON (Ethernet Passive Optical Network) Download PDFInfo
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- CN102832996A CN102832996A CN2012103220042A CN201210322004A CN102832996A CN 102832996 A CN102832996 A CN 102832996A CN 2012103220042 A CN2012103220042 A CN 2012103220042A CN 201210322004 A CN201210322004 A CN 201210322004A CN 102832996 A CN102832996 A CN 102832996A
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Abstract
The invention provides a constant emitting detecting and overcoming method of an optical module in an EPON (Ethernet Passive Optical Network). By using a logic programming module, the constant emitting detection of the optical module is finished while a control signal is generated to control a sending power of the optical module to reset. The device comprises an optical network unit, wherein the optical network unit comprises the optical module, an optical module power control unit, a central processing unit (CPU) and a logic control unit. The technical scheme provided by the invention is mostly applied to an MDU (Message Decode Unit) with a logic device (an FPGA (Field Programmable Gate Array) or a CPLD (Complex Programmable Logic Device)); with respect to the traditional analog circuit implementation method, the constant optical detection of the optical module and the turn-off of the sending power are realized by adopting the logic programming method; the method is cost-saving, stable and reliable in performance, adjustable in time threshold of constant emitting, and unrelated to the constant emitting protection and the flow; in addition, the protection is free from the influence of temperature and device parameter changes.
Description
Technical field
The invention belongs to the passive fiber communication technical field; Be particularly related to a kind of method that in EPON, the long hair optical module is detected and overcomes automatically; And the device of realizing this methodological function, the optical network unit optical module long hair light of this device logic-based programming detects and sends power remove.
Background technology
The passive fiber Ethernet is the optical fiber access technology of this point-to-multipoint of EPON (Ethernet Passive Optical Network Ethernet passive optical network); Because its technology maturation; Cost is low, green energy conservation, distance and bandwidth advantages of higher; Becoming not only in recent years Fiber to the home, FTTH, FTTB FTTB etc. are applied to the one preferred technique scheme of Access Network, and optical fiber inserts and got into large-scale commercialization at present.
Optical network unit is that optical node ONU (Optical Network Unit) is the terminal equipment in the EPON network architecture, because in the EPON network, the optical fiber that the PON (Passive Optical Network EPON) of OLT (Optical Line Terminal optical line terminal) mouth comes out can be hung 32 ONU at least; And EPON belongs to time-division multiplex technology; Therefore at up direction, each ONU carries out data according to the OLT distributed time slot and sends, if certain user's ONU is because some fault causes long hair light; Then can cause other user's ONU and OLT to separate registration; Cause its service disconnection, then can cause customer complaint, influence CSAT.Therefore, in network, have ONU the long hair light time to occur, long hair light is detected and outputting alarm, turn-off optical module simultaneously and send power supply, it is particularly important that this function seems, this function has become necessary part in the ONU design at present.
The conventional analogue circuit adopts discrete device to realize that following shortcoming is arranged:
1) circuit parameter is relevant with the inner Tx_SD signal of optical module type of drive, and different optical modules possibly need the adjustment circuit parameter;
2) at big flow, the Burst signal dutyfactor may misoperation near 1 the time;
3) can not adjust operate time of protection by software;
4) circuit parameter receives influence of temperature change easily;
Present ONU has several kinds of main flow types, and promptly SFU, HGU, MDU generally there is no need to use logical device in SFU and HGU, generally will inevitably in MDU.
Summary of the invention
For solving the deficiency that present conventional analogue circuit adopts discrete device to realize; The present invention provides and uses logical device to go the logical process of being correlated with; In this case; Realize optical module long hair light detect and send power remove have the cost of saving, stable and reliable for performance, long hair between the light time adjustable, the long hair light protection of thresholding and flow irrelevant, protection is not influenced by temperature, device parameters variation etc.
The present invention for the technical scheme of accomplishing its technical purpose and adopting is: optical module long hair light detects and overcomes method among a kind of EPON; The long hair light that this method utilizes the programming in logic module to accomplish optical module detects; Produce control signal simultaneously; The control optical module sends power reset, may further comprise the steps:
A, programming in logic unit detect the continuous fluorescent lifetime of each optical module;
If the continuous fluorescent lifetime of certain optical module of B exceeds threshold value, this optical module of programming in logic unit output control signal control resets, and returns steps A.
Further, optical module long hair light detects and overcomes in the method among the above-mentioned EPON: may further comprise the steps in the described steps A:
A01, programming in logic module detect whether system reset is arranged, and reset if having, and reset to accomplish to open to send power supply; Send power supply and get into next step otherwise directly open;
A02, system clock is carried out frequency division draw sampling elapsed time clock signal;
A03, programming in logic unit are used according to described sampling elapsed time clock signal the output high level of the luminous detection signal of each optical module are sampled;
A04, programming in logic unit count the sampling that the output high level of the luminous detection signal of optical module carries out; Count value is judged; If the output high level of the luminous detection signal of certain optical module is sampled greater than the threshold value of setting, judges that then the continuous fluorescent lifetime of this optical module exceeds threshold value.
Further; Optical module long hair light detects and overcomes in the method among the above-mentioned EPON: among the described step B; It is that the programming in logic unit produces control signal and controls the energy supply control module of described optical module and close and send the power settings time that the control optical module resets, and then opens this transmission power supply.
Further, optical module long hair light detects and overcomes in the method among the above-mentioned EPON: further comprising the steps of among the described step B:
1), output high level alarm signal reports CPU;
2), CPU gives local side apparatus through the OAM information reporting.
The present invention also provides optical module long hair light among a kind of EPON of completion to detect and overcome the device of method; Comprise optical network unit; Described optical network unit comprises optical module, optical module power control unit, CPU and logic control element; Described optical module power control unit links to each other with described optical module, produces the folding that control signal is controlled the transmission power supply of described optical module; Described programming in logic module links to each other with logic control element with described optical module, optical module power control unit, CPU respectively; Continuous fluorescent lifetime to described optical module detects; Produce control signal and control described optical module power control unit, and the generation detection signal is sent to described CPU.
Technical scheme of the present invention answers majority to be applied in the MDU product with logical device (FPGA or CPLD); With respect to conventional analogue circuit implementation method; Use the method for programming in logic realize optical module long hair light detect and send power remove have the cost of saving, stable and reliable for performance, long hair between the light time adjustable, the long hair light protection of thresholding and flow irrelevant, protection is not influenced by temperature, device parameters variation etc.
Below through combining specific embodiment and accompanying drawing that the present invention is further explained.
Description of drawings
Accompanying drawing 1 is the embodiment of the invention 1 flow chart.
Accompanying drawing 2 is block diagrams of product of the present invention.
Embodiment
As shown in Figure 1; The method that the optical network unit optical module long hair light of logic-based programming detected and sent power remove, this method is applicable among the ONU that has used logical device, generally is MDU; Comprise in the described optical network unit structure that programming in logic module and optical module send power switching module; Importantly: the long hair light that uses programming in logic to accomplish optical module detects and alarm output, exports optical module simultaneously and sends the mains switch control signal, and implementation procedure will be passed through following steps:
A, programming in logic unit detect the continuous fluorescent lifetime of each optical module;
A01, programming in logic module detect whether system reset is arranged, and reset if having, and reset to accomplish to open to send power supply; Send power supply and get into next step otherwise directly open;
A02, system clock is carried out frequency division draw sampling elapsed time clock signal;
A03, programming in logic unit are used according to described sampling elapsed time clock signal the output high level of the luminous detection signal of each optical module are sampled;
A04, programming in logic unit count the sampling that the output high level of the luminous detection signal of optical module carries out; Count value is judged; If the output high level of the luminous detection signal of certain optical module is sampled greater than the threshold value of setting, judges that then the continuous fluorescent lifetime of this optical module exceeds threshold value.
If the continuous fluorescent lifetime of certain optical module of B exceeds threshold value, this optical module of programming in logic unit output control signal control resets, and returns steps A.
1), output high level alarm signal reports CPU;
2), CPU gives local side apparatus through the OAM information reporting.
In the top method, need to set a threshold value, the normal thresholding time of just setting of fluorescent lifetime continuously; Surpassing this time just has been considered to fault, will not think normally the continuous hereto luminescence threshold time and surpass this time; Operator comprises not unified standard of telecommunications at present; In general judge that according to theory 1ms is just enough, but consider actual act time-delay or the like, generally be set at 10ms.Therefore, in the present embodiment with threshold settings be in the scope of 1-10ms according to practice, can set.In addition, only a kind of very serious thing of long hair in case optical module is turned off, generally is that fault is arranged, and needing system cut-off to restart just can restore electricity, and can initiatively not open the power supply of optical module power supply.
About being explained as follows of threshold value: according to the Weight of OLT, we know that Weight's once is 128Kbyte to the maximum.So 128K*8=1Mbits, just 1ms.Consider optical module switch, synchronous equal time, we general recommendations 10ms just can regard as long hair light.
During this method practical implementation, as shown in Figure 2, the inventive method is based on optical network unit, and this NE comprises: be CPU, and the optical signal transceiver modular circuit, the programming in logic module is that optical module sends power switching module.Referring to Fig. 2, at first whether the hardware logic unit judges has systematic reset signal, if having, then exports control signal and is given to optical module and sends energy supply control module and close the transmission power supply.If or do not reset to accomplish then at first export control signal and be given to optical module and send energy supply control module and open and send power supply; Obtain required sampling clock from the system clock frequency division, TX-SD signal high level is sampled, threshold value is carried out in the sample count timing judge; If greater than threshold value; Then the outputting alarm signal is given CPU, and CPU is uploaded to the local side webmaster through OAM, and programming in logic module output control signal is given to optical module transmission energy supply control module and closes the transmission power supply simultaneously; If high level time does not surpass threshold value, then carry out next round and detect.The optical network unit optical module long hair light of so accomplishing the logic-based programming detects and sends the power remove function.
Claims (7)
1. optical module long hair light detects and overcomes method among the EPON, and it is characterized in that: the long hair light that this method utilizes the programming in logic module to accomplish optical module detects, and produces control signal simultaneously, and the control optical module sends power reset, may further comprise the steps:
A, programming in logic unit detect the continuous fluorescent lifetime of each optical module;
If the continuous fluorescent lifetime of certain optical module of B exceeds threshold value, this optical module of programming in logic unit output control signal control resets, and returns steps A.
2. optical module long hair light detects and overcomes method among the EPON according to claim 1, it is characterized in that: may further comprise the steps in the described steps A:
A01, programming in logic module detect whether system reset is arranged, and reset if having, and reset to accomplish to open to send power supply; Send power supply and get into next step otherwise directly open;
A02, system clock is carried out frequency division draw sampling elapsed time clock signal;
A03, programming in logic unit are used according to described sampling elapsed time clock signal the output high level of the luminous detection signal of each optical module are sampled;
A04, programming in logic unit count the sampling that the output high level of the luminous detection signal of optical module carries out; Count value is judged; If the output high level of the luminous detection signal of certain optical module is sampled greater than the threshold value of setting, judges that then the continuous fluorescent lifetime of this optical module exceeds threshold value.
3. optical module long hair light detects and overcomes method among the EPON according to claim 1; It is characterized in that: among the described step B; It is that the programming in logic unit produces control signal and controls the energy supply control module of described optical module and close and send the power settings time that the control optical module resets, and then opens this transmission power supply.
4. optical module long hair light detects and overcomes method among the EPON according to claim 1, it is characterized in that: further comprising the steps of among the described step B:
1), output high level alarm signal reports CPU;
2), CPU gives local side apparatus through the OAM information reporting.
5. detect according to optical module long hair light among the arbitrary described EPON of claim 1 to 3 and overcome method, it is characterized in that: described threshold value is: 1-10ms.
6. optical module long hair light detects and overcomes the device of method among the EPON according to claim 1; Comprise optical network unit; It is characterized in that: described optical network unit comprises optical module, optical module power control unit, CPU and logic control element; Described optical module power control unit links to each other with described optical module, produces the folding that control signal is controlled the transmission power supply of described optical module; Described programming in logic module links to each other with logic control element with described optical module, optical module power control unit, CPU respectively; Continuous fluorescent lifetime to described optical module detects; Produce control signal and control described optical module power control unit, and the generation detection signal is sent to described CPU.
7. device according to claim 5 is characterized in that: the use of described programming in logic unit (2) be CPLD device or FPGA device.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103199921A (en) * | 2013-03-26 | 2013-07-10 | 上海斐讯数据通信技术有限公司 | Ethernet passive optical network (EPON) optical distribution network (ONU) long-luminescence detection circuit |
| CN105281824A (en) * | 2014-05-27 | 2016-01-27 | 中兴通讯股份有限公司 | Method and device for detecting constant light-emitting optical network unit (ONU) and network management equipment |
| CN103532541B (en) * | 2013-09-30 | 2017-02-22 | 上海斐讯数据通信技术有限公司 | Light module power supply control method and system |
| CN107423027A (en) * | 2017-07-24 | 2017-12-01 | 杭州迪普科技股份有限公司 | A kind of information-reading method of optical module, device and system |
| CN111953412A (en) * | 2020-08-07 | 2020-11-17 | 苏州浪潮智能科技有限公司 | Method and device for realizing optical information synchronization of optical module switch |
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| CN101262282A (en) * | 2007-03-06 | 2008-09-10 | 中兴通讯股份有限公司 | A method and device for improving reliability of passive optical network |
| CN102098096A (en) * | 2009-12-11 | 2011-06-15 | 中兴通讯股份有限公司 | Fault detection method and system in passive optical network |
| CN102098097A (en) * | 2009-12-14 | 2011-06-15 | 中兴通讯股份有限公司 | Optical network unit fault detection method and system in PON and optical line terminal |
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| EP1802007A2 (en) * | 2005-12-23 | 2007-06-27 | Huawei Technologies Co., Ltd. | A passive optical network maintenance method, an optical network unit and an optical line terminal |
| US20080044177A1 (en) * | 2006-08-16 | 2008-02-21 | Huawei Technologies Co., Ltd. | Method for detecting upstream timeslot conflict in passive optical network and optical line terminal therein |
| CN101262282A (en) * | 2007-03-06 | 2008-09-10 | 中兴通讯股份有限公司 | A method and device for improving reliability of passive optical network |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103199921A (en) * | 2013-03-26 | 2013-07-10 | 上海斐讯数据通信技术有限公司 | Ethernet passive optical network (EPON) optical distribution network (ONU) long-luminescence detection circuit |
| CN103532541B (en) * | 2013-09-30 | 2017-02-22 | 上海斐讯数据通信技术有限公司 | Light module power supply control method and system |
| CN105281824A (en) * | 2014-05-27 | 2016-01-27 | 中兴通讯股份有限公司 | Method and device for detecting constant light-emitting optical network unit (ONU) and network management equipment |
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| CN107423027A (en) * | 2017-07-24 | 2017-12-01 | 杭州迪普科技股份有限公司 | A kind of information-reading method of optical module, device and system |
| CN111953412A (en) * | 2020-08-07 | 2020-11-17 | 苏州浪潮智能科技有限公司 | Method and device for realizing optical information synchronization of optical module switch |
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