CN102916742A - Method and device for detecting and closing constant light-emitting optical network unit - Google Patents
Method and device for detecting and closing constant light-emitting optical network unit Download PDFInfo
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Abstract
The invention discloses a method and a device for detecting and closing a constant light-emitting optical network unit (ONU). The method for detecting the constant light-emitting ONU comprises the following steps: the effective time length of a detection signal at a constant light-emitting state is detected, and the detection signal in the constant light-emitting state is a transmission light detection signal Tx_SD of an optical module, or a transmission light enable signal Tx_EN of the optical module, or a logic operation result of the Tx_SD and the Tx_EN; and whether an optical network unit is in the constant light-emitting state or not is determined based on whether the effective time length exceeds the set value or not. The device provided by the invention has a simple and reliable circuit structure; and when the ONU is detected in the constant light-emitting state, a laser can be closed by various ways so as to enable the optical module of the ONU and an ONU master module to have the independent abilities of stopping the transmission of an uplink signal to avoid the problem that the constant light-emitting ONU can not be closed, which is caused by hardware and software failures of a signal module, so that the reliability of a rogue ONU hazard reduction mechanism is greatly improved.
Description
Technical field
The present invention relates to optical network unit, be specifically related to the detection of long hair light optical network unit and method for closing, device.
Background technology
In order to save channel resource or transmission medium, a plurality of users can be by adopting such as time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency DivisionMultiple Access, FDMA), wavelength division multiple access (Wavelength Division MultipleAccess, WDMA) and code division multiple access (Code Division Multiple Access, CDMA) etc. form certain orthogonality between the data that multiplex mode sends different user, thereby realize access to certain node in the mode of sharing same passage, the mode of this share and access has been widely used in having obtained huge success in the Modern Communication System such as wireless and radio communication.
In the Access Network field, also generally adopted the mode of share medium in the uplink communication process of multiple passive optical network technique, be positioned at central office (Central Office, CO) optical line terminal (Optical Line Terminal, OLT) via optical distribution network (Optical DistributionNetwork, ODN) being connected to a plurality of ONU or the ONT that are positioned at far-end (hereinafter as not specifies, ONT and ONU will not distinguished, unified this title of ONU of using), so that under the prerequisite that satisfies certain multiple access control procedure of making an appointment, a plurality of ONU can communicate by letter with OLT by same passage or medium.
Adopt Ethernet passive optical network (the Ethernet PassiveOptical Network of time division multiplexing share medium mode, EPON) and gigabit passive optical network (Gigabit-capable PassiveOptical Network, GPON) technology has obtained widespread deployment in global Access Network, formed the huge market scale, for hundreds of millions families and business user provide the express network access service.10G-EPON (10Gb/s EthernetPassive Optical Network) and the XG-PON (10-Gigabit-capable PassiveOptical Network) of Typical Representative of EPON evolution technology finished standardization by IEEE and ITU respectively as mid-term, time-multiplexed share medium mode has still been continued to use in the uplink of the two, technology and industrial chain are progressively ripe at present, will lead future Access Network to enter the 10G epoch.
Meanwhile, comprise each large telecom operators, telecommunication apparatus, information and communication service and solution provider, telecommunications devices and chip manufacturer the member of interior whole piece EPON industrial chain just in the FSAN framework, discussing in full preparation take aspect bandwidth, capacity, transmission range, compossibility and the cost performance with respect to mid-term the PON evolution technology have more advantage as the PON network of target evolution technology, i.e. NG-PON2 solution at a specified future date.The alternative solution of NG-PON2 is various, through the repeatedly discussion of FSAN meeting, the solution of including at present FSAN follow-up meeting discussion scope in comprises: time-division Wave division multiplexing passive optical network (Time-Wavelength-Division Multiplexing Passive OpticalNetwork, TWDM-PON), the Wave division multiplexing passive optical network of Wavelength reuse (Wavelength ReuseWavelength-Division Multiplexing Passive Optical Network, WRWDM-PON), Wave division multiplexing passive optical network (TunableWavelength-Division Multiplexing Passive Optical Network based on tunable light source, TunableWDM-PON), ultra dense wavelength division multiple EPON (Ultra-DenseWavelength-Division Multiplexing Passive Optical Network, UDWDM-PON) and intensity modulated direct-detection orthogonal frequency division multiplexing passive optical network (Intensity ModulationDirect Detection Orthogonal Frequency-Division Multiplexing PassiveOptical Network, IMDD OFDM-PON).Estimate that final NG-PON2 solution will produce from above-mentioned solution.These schemes have adopted respectively TDMA, WDMA and FDMA technology to realize that a plurality of ONU access OLT by the mode of share medium.
When ONU communicates by letter with OLT by share medium, for the uplink communication that guarantees certain ONU can not cause interference to other ONU, must make its behavior strictly satisfy the multipoint access control protocol, usually, this Multi-point Control Protocol is realized by media interviews control (Media Access Control, MAC) chip of OLT and ONU side.In the TDMA mode as example, require ONU control optical transceiver module in the time slot that OLT distributes of appointment to send uplink optical signal, in this time slot, OLT will only receive the signal from this ONU.If the multipoint access control protocol can't be strictly satisfied in the transmission behavior of certain ONU, be called rogue ONU (Rogue ONU), this will cause interference to a plurality of other ONU in this PON network, affect uplink communication, What is more, in the situation that exceedingly odious, and for example certain ONU long hair light and the control that broken away from MAC, to so that uplink communication can't normally carry out fully, cause the thoroughly serious network failure of paralysis of uplink communication.And this obviously runs in the opposite direction with high reliability request of carrier class communication system, so the detection rogue ONU that takes appropriate measures in system and equipment alleviates and the demand of evading its harm just seems very necessary and particularly urgent.
In order to address the above problem, prior art has following several solution:
(1) " method of closing constant optical network unit and optical network unit thereof " (application number 200910078925.7) of China Mobile Communications Corporation's application proposed a kind of method that detects long luminance ONU, and its operation principle is to use optical branching device cutting out partial light signal from the light signal of optical module output to be used for long hair light to detect.Need the built-in shunt device among the ONU that adopts this mode to make, be not easy to mass automatic production, improved the packaging cost of ONU.
(2) ZTE Co., Ltd's " fault detect of optical network unit, control method and optical network unit " (application number 200910252446.2) has proposed a kind of method that detects long hair light fault, also will detect pulse duration by the light emission instruction signal that repeatedly reads optical module, its pulse duration is compared with the pulse duration of led control signal, determined whether to cut off optical module and send power supply.The limitation of the method is, host CPU needs repeatedly relatively light emission instruction signal pulse duration and led control signal, because the restriction of accuracy of timekeeping and time-delay and shake easily causes erroneous judgement.In addition, all need host CPU to participate in owing to judging the control procedure of long luminance ONU and shutoff optical module, if hardware and software failure appears in host CPU, the method was lost efficacy.
(3) " a kind of detection method of optical network unit, device and passive optical network " (application number 201110077143.9) of Huawei Tech Co., Ltd proposed the detection method of a kind of rogue ONU, open a upper line space window, detect the identification code of rogue ONU.The defective of the method is, needs by a control module, and normally ONU MAC mails to optical module with the ONU Identity Code.And a kind of key factor that causes rogue ONU is exactly the hardware and software failure of MAC, in such cases probably MAC can't provide correct identity identity code to ONU.In addition, if two and above rogue ONU are arranged, will send simultaneously at upper line space window time slot the Identity Code of self to OLT, so that OLT possibly can't correctly extract the Identity Code of two rogue ONU.
This shows, all there is certain limitation in the existing method that detects and close rogue ONU.
Summary of the invention
Technical problem to be solved by this invention is to solve to detect and close how at low cost rogue ONU, thereby alleviates it to the problem of the harm of uplink.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention provides a kind of detection method of long hair light optical network unit, may further comprise the steps:
Detect effective duration of long hair light state detection signal, the transmission light detecting signal Tx_SD that described long hair light state detection signal is optical module or the transmission light enable signal Tx_EN of optical module or the logic operation result of described Tx_SD and described Tx_EN;
Whether surpass set point according to described effective duration and judge whether optical network unit is in the long hair light state.
In above-mentioned detection method, described long hair light state detection signal is the exclusive disjunction result of described Tx_EN and described Tx_SD.
In above-mentioned detection method, further comprising the steps of:
The optical module supply power voltage of monitoring optical network unit when described supply power voltage is lower than setting voltage, is restarted the optical module control module of optical network unit.
The present invention also provides a kind of checkout gear of long hair light optical network unit, comprise long hair light detection module, described long hair light detection module detects effective duration of long hair light state detection signal, and whether surpass set point according to described effective duration and judge whether long hair light of optical network unit, the transmission light detecting signal Tx_SD that described long hair light state detection signal is optical module or the transmission light enable signal Tx_EN of optical module or the logic operation result of described Tx_SD and described Tx_EN.
In above-mentioned detection device, described long hair light state detection signal is the exclusive disjunction result of described Tx_EN and described Tx_SD.
In above-mentioned detection device, described long hair light detection module detects the optical module supply power voltage of optical network unit in real time, when described supply power voltage is lower than setting voltage, restarts the optical module control module of optical network unit.
The present invention also provides the method for a kind of detection and closing constant optical network unit, may further comprise the steps:
Whether surpass the judged result whether optical module that set point obtains optical network unit is in the long hair light state, the transmission light detecting signal Tx_SD that described long hair light state detection signal is optical module or the transmission light enable signal Tx_EN of optical module or the logic operation result of described Tx_SD and described Tx_EN by the effective duration that detects long hair light state detection signal;
When described judged result shows that optical module is in the long hair light state, adopt one of following four kinds of modes or combination in any to close the laser of optical network unit:
(1) by described Tx_EN is set to high level laser cuts out;
(2) by the transmitting terminal power supply that cuts off optical module the laser dead electricity is closed;
(3) by disconnecting the laser control signal laser cuts out;
(4) by modulated current and the bias current that disconnects laser laser cuts out.
In the method for above-mentioned detection and closing constant optical network unit, described long hair light state detection signal is the exclusive disjunction result of described Tx_EN and described Tx_SD.
In the method for above-mentioned detection and closing constant optical network unit, further comprising the steps of: the optical module supply power voltage of monitoring optical network unit, when described supply power voltage is lower than setting voltage, restart the optical module control module of optical network unit.
The present invention also provides the device of a kind of detection and closing constant optical network unit, comprise long hair light detection module, long hair light fault indication signal output module, optical module control module, ONU main control module and laser shutdown module, described long hair light detection module is normal or abnormal indication signal according to the State-output optical module of long hair light state detection signal, the transmission light detecting signal Tx_SD that described long hair light state detection signal is optical module or the transmission light enable signal Tx_EN of optical module or the logic operation result of described Tx_SD and described Tx_EN; Described long hair light fault indication signal output module enables to allow in the effective situation of signal described optical module abnormal indication signal to be exported as long hair light fault indication signal at it; Described optical module control module produces according to described long hair light fault indication signal and turn-offs the laser control signal; Described ONU main control module is set to high level according to the described Tx_EN of described long hair light fault indication signal; Described laser shutdown module is closed the laser of optical network unit according to one of the described Tx_EN of described shutoff laser control signal and high level or the two.
In the device of above-mentioned detection and closing constant optical network unit, described optical module control module produces modulated current and the bias current signal of turn-offing laser according to described long hair light fault indication signal; Described laser shutdown module is according to the modulated current of described shutoff laser and modulated current and the bias current of bias current signal signal cut laser.
In the device of above-mentioned detection and closing constant optical network unit, described long hair light state detection signal is the exclusive disjunction result of described Tx_EN and described Tx_SD.
In the device of above-mentioned detection and closing constant optical network unit, also comprise light transmitting element power remove module, described optical module control module produces the transmitting terminal power control signal that cuts off optical module according to described long hair light fault indication signal, described transmitting element power remove module disconnects the transmitting terminal power supply of optical module.
In the device of above-mentioned detection and closing constant optical network unit, described long hair light detection module is watchdog circuit, its output enable allows signal to be provided by described optical module control module, described long hair light state detection signal is inputted by the input pin of described watchdog circuit, and exports described optical module abnormal indication signal by the output pin of described watchdog circuit; Described long hair light fault indication signal output module is buffer circuits, receive described long hair light fault indication signal, and at the described time output two-way long hair light fault indication signal that enables to allow signal effective respectively to described optical module control module and described ONU main control module; Described ONU main control module disconnects the transmitting terminal power control signal of optical module according to described long hair light fault indication signal output, described smooth transmitting element power remove module disconnects the transmitting terminal power supply of optical module according to the transmitting terminal power control signal of described disconnection optical module.
In the device of above-mentioned detection and closing constant optical network unit, the supply power voltage of described long hair light detection module monitoring optical module, when described supply power voltage is lower than setting voltage, the optical network unit control signal is restarted in output, and described optical module control module is restarted the optical network unit control signal and restarted according to described.
The present invention, the circuit structure that detects the ONU luminance is simple and reliable, when detecting ONU and be in the long hair light state, produce hardware interrupt, then directly turn-off in several ways modulated current, drive current and the optical module transmitting terminal power supply of optical module, so that ONU optical module and ONU main control module all have the ability that autonomous shutoff upward signal sends, avoid because the hardware and software failure of individual module causes the problem that can't close long luminance ONU, significantly improved rogue ONU harm and alleviated machine-processed reliability.
Description of drawings
Fig. 1 is the device schematic diagram of detection provided by the invention and closing constant optical network unit;
Fig. 2 is a kind of specific embodiment schematic diagram of device shown in Figure 1;
Fig. 3 is the method flow diagram of detection provided by the invention and closing constant optical network unit;
Fig. 4 is a specific embodiment of light transmitting element power remove module in the device shown in the present.
Embodiment
The method and apparatus of detection provided by the invention and closing constant optical network unit, ONU optical module and ONU main control module all have the ability that autonomous shutoff upward signal sends, avoid significantly having improved the reliability of closing rogue ONU because the hardware and software failure of individual module causes the problem that can't close long luminance ONU.Below in conjunction with accompanying drawing the present invention is made detailed explanation.
Fig. 1 is detection provided by the invention and the device schematic diagram of closing long luminance ONU, as shown in Figure 1, this device comprises long hair light detection module 11, long hair light fault indication signal output module 12, optical module control module 13, laser shutdown module 14, ONU main control module 15 and light transmitting element power remove module 16.Usually, long hair light detection module 11, long hair light fault indication signal output module 12, optical module control module 13 and laser shutdown module 14 can realize in optical transceiver module (hereinafter referred to as optical module) 10 inside, and ONU main control module 15 and ONU main control module 16 can be realized optical network unit (ONU) 100 inside outside optical transceiver module 10.
Long hair light detection module 11 is normal or abnormal indication signal according to the State-output optical module of long hair light state detection signal; Long hair light fault indication signal output module 12 enables to allow in the effective situation of signal the optical module abnormal indication signal to be exported to ONU main control module 15 and optical module control module 13 as long hair light fault indication signal at it; Optical module control module 13 produces according to long hair light fault indication signal and turn-offs the laser control signal or turn-off the laser drive current control signal; Laser shutdown module 14 is according to turn-offing the laser control signal or turn-offing the laser drive current control signal, close laser or disconnect the modulated current of laser and bias current that laser is stopped is luminous.In addition, ONU main control module 15 can also enable Tx EN according to the transmission of long hair light fault indication signal optical module and be set to high level, and closes laser by laser shutdown module 14; Perhaps ONU main control module 15 cuts off the power Vcc T that flows to laser shutdown module 14 according to long hair light fault indication signal control ONU main control module 16, and laser cuts out.
Fig. 2 is a specific embodiment of detection shown in Figure 1 and the device of closing long luminance ONU, and as shown in Figure 2, long hair light detection module 11 can be realized by a watchdog circuit.If ONU optical module 10 supports to send light detecting signal Tx_SD, then with the output signal of Tx_SD as optical module, whether be used to indicate current lasers just luminous, usually, Tx_SD shows optical module just luminous when being high level, so can be with Tx_SD as long hair light state detection signal; If the ONU optical module is not supported Tx_SD, then can select the transmission light enable signal Tx_EN of optical module as long hair light state detection signal, Tx_EN is the uplink burst led control signal, usually, when it is set to low level by ONU main control module 15, laser driver (Laser Diode Driver, LDD) by optical module inside is opened laser, so also can be with the transmission light enable signal Tx_EN of optical module as long hair light state detection signal.Certainly, for so that this device can adaptive more optical module, also can do after the logical operation Tx_SD and Tx_EN, again with the result as long hair light state detection signal.(for example, Tx_EN and Tx_SD being made exclusive disjunction).The long hair light detection module of realizing take watchdog circuit is as example, long hair light state detection signal is admitted to WDI pin (the WatchDog Input of watchdog chip, the house dog input pin), the effect of this pin is to start a timer after normally powering on, if the input signal of WDI pin does not still have rising edge or trailing edge to occur before timer expiry, then from WDO pin (WatchDog Output, the house dog output pin) low-level output signal Abn_Ind of output, this low level signal is as the optical module abnormal indication signal, and the luminance that is used to indicate the ONU optical module does not change before WatchDog Timer is overtime.In addition, also can utilize the input voltage Vcc of the supply voltage comparator function monitoring optical module control module 13 of watchdog circuit, the function of optical module control module 13 generally can realize at the microprocessor of optical transceiver module 10 inside, voltage vcc _ the Div of Vcc after by the bleeder circuit dividing potential drop sent into PFI pin (the Power-Fail ComparatorInput of watchdog circuit, power failure is input pin relatively), when Vcc_Div is lower than setting voltage, show the Vcc brownout, by PFO pin (Power-Fail Output, the power failure output pin) output one low level signal Rst, this signal is connected to the Reset pin of optical module control module 13, restart the optical module control module when hanging down for crossing at input voltage Vcc, prevent because power failure causes optical module control module self operation irregularity, assurance optical module control module sustainable monitoring rogue's ONU state is also suitably processed.
Long hair light signal output module 12 can be realized by a buffer circuits, optical module abnormal indication signal Abn_Ind is admitted to A1 pin and the A2 pin of long hair light signal output module 12, its output enable allows pin (Output Enable, OE) input signal is provided by the GPIO1 pin of optical module control module 13, when OE is low level, signal from A1 and A2 is exported long hair light fault indication signal Rog_Ind1 and Rog_Ind2 by Y1 and Y2 pin, otherwise does not export.Can be produced by logical operation according to ONU debugging mode index signal Debug_Mode and ONU energy saver mode index signal Power_Save by the optical module control module from the signal of GPIO1 pin that (specifically doing which kind of logical operation need to determine according to the significant level of signal, this is techniques well known, does not repeat them here).When ONU is in debugging mode, general optical module will be in the long hair light state, and when ONU was in energy saver mode, optical module was in long not luminance.Send into long hair light signal output module 12 as enabling to allow signal by the result with logical operation, can guarantee when ONU is in debugging mode and energy saver mode, not to ONU main control module 15 and optical module control module 13 output long hair light fault indication signal Rog_Ind1 and Rog_Ind2.
Long hair light fault indication signal Rog_Ind2 is imported into the GPIO2 pin of optical module control module 13, during normal operation, optical module control module 13 will be pressed the certain frequency sampling to the signal level of GPIO2 pin, be low in case detect this pin level, then perceive ONU and be in the long hair light state, produce one by its GPIO3 pin and be used for turn-offing laser drive current signal Dri_Dis and keeping output level constant.
The function of laser shutdown module 14 is generally realized by laser driver LDD module, if LDD supports Shut_Down signal output function (this signal can be used for turn-offing bias current and the modulated current of laser), then Dri_Dis directly can be sent into LDD, be set to height by LDD by Shut_down pin generation Shut_Down signal and its, this signal is connected to a P channel MOS tube (P-channel MOSFET transistor, PMOS) grid is as the control signal of this PMOS pipe.When Shut_Down when low, PMOS manages conducting, the power Vcc T of light transmitting element power remove module 16 outputs is delivered to the anode of laser diode LD, laser is normally luminous, under the driving of the modulated current of the Mod of LDD pin and Bias pin output and bias current, be loaded on the light carrier and send from the upward signal of ONU main control module 15.As Shut_Down when being high, the PMOS pipe is turned off, and laser stops luminous, can withdraw from the long hair light state.Certainly, if LDD does not support Shut_Down signal output function, can directly be exported by optical module control module 13 the Shut_Down signal of a high level, then still turn-off bias current and the modulated current of LD by the PMOS pipe.
Long hair light fault indication signal Rog_Ind1 is imported into the GPIO4 pin of ONU main control module 15, the function of ONU main control module 15 generally can be realized by CPU and the MAC chip of ONU inside, during normal operation, ONU main control module 15 will be pressed the certain frequency sampling to the signal level of GPIO4 pin, be low in case detect this pin level, then perceive ONU and be in the long hair light state, produce one by its GPIO5 pin and be used for turn-offing the ShutDown_VccT signal of light transmitting element power supply and keeping output level constant.In addition, also can by the MAC chip directly Tx_EN be set to high level, thereby turn-off laser by LDD.
Light transmitting element power remove module 14 is mainly used in turn-offing the power Vcc T of light transmitting element.Can be realized by two kinds of method and apparatus, first method is to adopt the PMOS control device identical with above-mentioned laser shutdown module, the second is by Long-distance Control pin (the Remote Control of control inputs to light transmitting element power module, RC) the level realization of ShutDown_VccT, as shown in Figure 4.For the positive logic power module, when being low level, ShutDown_VccT will turn-off VccT, for the negative logic power module, when being high level, ShutDown_VccT will turn-off VccT.
Above introduction be the device that detects and close long luminance ONU, obviously, only just can realize the detection of long luminance ONU by long hair light detection module 11.
Fig. 3 is detection provided by the invention and closes the long luminance ONU method flow diagram.
See also Fig. 3, the step that detects and will close long luminance ONU is as follows:
After step 1:ONU power up is finished, constantly detect effective duration of long hair light state detection signal.
Step 2: whether surpass set point according to described effective duration and judge whether optical module is in the long hair light state; If light detecting signal Tx_SD is high level and surpasses the setting duration, shows that then optical module is in the long hair light state; If optical module transmission light enable signal Tx_EN is high level and surpasses the setting duration, show that then optical module is in the long hair light state.
Further, optical module can be sent light enable signal Tx_EN and light detecting signal Tx_SD and make exclusive disjunction as long hair light state detection signal, if the result of exclusive disjunction be high level and surpass set duration, show that then optical module is in the long hair light state.This mode can be expanded the scope of application of ONU.
Step 3: if optical module is in the long hair light state, then produce an optical module abnormal indication signal, detect long hair light fault indication signal output enable enable state, effectively then the optical module abnormal indication signal is exported as long hair light fault indication signal if enable to allow; Otherwise, do not export long hair light fault indication signal.
Step 4: according to long hair light fault indication signal, adopt one of following four kinds of modes or combination in any to close laser.
(1) the ONU main control module sends light enable signal Tx_EN with optical module and is set to high level to the laser shutdown module, closes laser by the laser shutdown module;
(2) the ONU main control module produces the instruction of turn-offing light transmitting element power supply, and light transmitting element power remove module is cut off optical module transmitting terminal power Vcc T according to the instruction of turn-offing light transmitting element power supply;
(3) laser drive current signal Dri_Dis is turn-offed in the output of optical module control module, and the laser shutdown module disconnects modulated current and the bias current of its Mod pin and the output of Bias pin according to shutoff laser drive current signal Dri_Dis;
(4) laser drive current signal Dri_Dis is turn-offed in the output of optical module control module, and control laser shutdown module produces the Shut_Down control signal according to turn-offing laser drive current signal Dri_Dis, closes laser.
Because power failure causes optical module control module self operation irregularity, method provided by the invention is further comprising the steps of in order to prevent:
The supply power voltage Vcc of the optical module voltage vcc _ Div after by the bleeder circuit dividing potential drop is monitored, when Vcc_Div is lower than setting voltage, export the optical module control module that a low level signal Rst is restarted optical network unit.
Obviously, step 1 and step 2 can have been finished the detection of long luminance ONU.
It is to be noted, pass through above-mentioned steps, ONU withdraws from the long hair light state the most at last, long hair light detection module also will detect ONU and withdraw from the long hair light state at this moment, long hair light fault indication signal is eliminated, so optical module control module and ONU main control module all can perceive current ONU and withdraw from the long hair light state, but all will continue to keep turn-offing the optical module drive current, turn-off light transmitting element electric current and cancel optical module and send the instruction that enables, after avoiding again allowing this ONU luminous, this ONU continues to enter the long hair light state, and other ONU that share up medium or passage are continued to impact.
The above only is preferred embodiment of the present invention.In addition, on rogue ONU detection disclosed by the invention and alleviator basis, also can slightly make improvements or add other functions.For example, in optical module control module and ONU main control module, a timer is set all, behind the long hair light fault indication signal of receiving from long hair light fault indication signal output module, optical module control module and ONU main control module start respectively each self-timer, the ONU main control module sends to optical module with the ONU identifier by data pin, in order to can under the control of the rogue ONU location mechanism that OLT starts, by uplink rogue ONU identifier be sent to OLT, so that OLT can identify rogue ONU identifier, thereby finish fault location and carry out follow-up troubleshooting.The ONU identifier is the specific identity coding that ONU has, and includes but not limited to one group of unique coding that ONU ID, ONU SN, MAC Address, LLID (LogicalLink Identifier, LLID) and ONU provider give etc.Behind timer expiry, issue immediately the shutoff instruction by ONU main control module and optical module control module, turn-off respectively optical module bias current and modulated current, cancel optical module and send the power supply that enables and turn-off the light transmitting element.By above-mentioned improvement, so that the method and device have detection, report and eliminate the function of rogue ONU simultaneously.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (16)
1. the detection method of long hair light optical network unit is characterized in that, may further comprise the steps:
Detect effective duration of long hair light state detection signal, the transmission light detecting signal Tx_SD that described long hair light state detection signal is optical module or the transmission light enable signal Tx_EN of optical module or the logic operation result of described Tx_SD and described Tx_EN;
Whether surpass set point according to described effective duration and judge whether optical network unit is in the long hair light state.
2. detection method as claimed in claim 1 is characterized in that,
Described long hair light state detection signal is the exclusive disjunction result of described Tx_EN and described Tx_SD.
3. detection method as claimed in claim 1 or 2 is characterized in that, and is further comprising the steps of:
The optical module supply power voltage of monitoring optical network unit when described supply power voltage is lower than setting voltage, is restarted the optical module control module of optical network unit.
4. the checkout gear of long hair light optical network unit is characterized in that, comprising:
Long hair light detection module, detect effective duration of long hair light state detection signal, and whether surpass set point according to described effective duration and judge whether long hair light of optical network unit, the transmission light detecting signal Tx_SD that described long hair light state detection signal is optical module or the transmission light enable signal Tx_EN of optical module or the logic operation result of described Tx_SD and described Tx_EN.
5. checkout gear as claimed in claim 4 is characterized in that,
Described long hair light state detection signal is the exclusive disjunction result of described Tx_EN and described Tx_SD.
6. checkout gear as claimed in claim 4 is characterized in that,
Described long hair light detection module detects the optical module supply power voltage of optical network unit in real time, when described supply power voltage is lower than setting voltage, restarts the optical module control module of optical network unit.
7. the method for detection and closing constant optical network unit is characterized in that, may further comprise the steps:
Whether surpass the judged result whether optical module that set point obtains optical network unit is in the long hair light state, the transmission light detecting signal Tx_SD that described long hair light state detection signal is optical module or the transmission light enable signal Tx_EN of optical module or the logic operation result of described Tx_SD and described Tx_EN by the effective duration that detects long hair light state detection signal;
When described judged result shows that optical module is in the long hair light state, adopt one of following four kinds of modes or combination in any to close the laser of optical network unit:
(1) by described Tx_EN is set to high level laser cuts out;
(2) by the transmitting terminal power supply that cuts off optical module the laser dead electricity is closed;
(3) by disconnecting the laser control signal laser cuts out;
(4) by the drive current that disconnects laser laser cuts out.
8. the method for detection as claimed in claim 7 and closing constant optical network unit is characterized in that,
Described long hair light state detection signal is the exclusive disjunction result of described Tx_EN and described Tx_SD.
9. the method for detection as claimed in claim 7 and closing constant optical network unit is characterized in that,
Further comprising the steps of: the optical module supply power voltage of monitoring optical network unit, when described supply power voltage is lower than setting voltage, restart the optical module control module of optical network unit.
10. the device of detection and closing constant optical network unit is characterized in that, comprising:
Long hair light detection module, normal or the abnormal indication signal according to the State-output optical module of long hair light state detection signal, the transmission light detecting signal Tx_SD that described long hair light state detection signal is optical module or the transmission light enable signal Tx_EN of optical module or the logic operation result of described Tx_SD and described Tx_EN;
Long hair light fault indication signal output module enables to allow in the effective situation of signal described optical module abnormal indication signal to be exported as long hair light fault indication signal at it;
The optical module control module produces shutoff laser control signal according to described long hair light fault indication signal;
The ONU main control module, described Tx_EN is set to high level according to described long hair light fault indication signal;
The laser shutdown module is closed the laser of optical network unit according to one of the described Tx_EN of described shutoff laser control signal and high level or the two.
11. the device of detection as claimed in claim 10 and closing constant optical network unit is characterized in that,
Described optical module control module produces according to described long hair light fault indication signal and turn-offs the laser drive current control signal;
Described laser shutdown module is according to modulated current and the bias current of described shutoff laser drive current control signal signal cut laser.
12. the device of detection as claimed in claim 10 and closing constant optical network unit is characterized in that,
Described long hair light state detection signal is the exclusive disjunction result of described Tx_EN and described Tx_SD.
13. the device of detection as claimed in claim 10 and closing constant optical network unit is characterized in that,
Also comprise light transmitting element power remove module, described optical module control module produces the transmitting terminal power control signal that cuts off optical module according to described long hair light fault indication signal, and described transmitting element power remove module disconnects the transmitting terminal power supply of optical module.
14. the device of detection as claimed in claim 13 and closing constant optical network unit is characterized in that,
Described long hair light detection module is watchdog circuit, its output enable allows signal to be provided by described optical module control module, described long hair light state detection signal is inputted by the input pin of described watchdog circuit, and exports described optical module abnormal indication signal by the output pin of described watchdog circuit;
Described long hair light fault indication signal output module is buffer circuits, receive described long hair light fault indication signal, and at the described time output two-way long hair light fault indication signal that enables to allow signal effective respectively to described optical module control module and described ONU main control module;
Described ONU main control module disconnects the transmitting terminal power control signal of optical module according to described long hair light fault indication signal output, described smooth transmitting element power remove module disconnects the transmitting terminal power supply of optical module according to the transmitting terminal power control signal of described disconnection optical module.
15. the device of detection as claimed in claim 14 and closing constant optical network unit is characterized in that,
The supply power voltage of described long hair light detection module monitoring optical module, when described supply power voltage was lower than setting voltage, the optical network unit control signal was restarted in output, and described optical module control module is restarted the optical network unit control signal and is restarted according to described.
16. the device of detection as claimed in claim 15 and closing constant optical network unit, it is characterized in that, the supply power voltage that compares input pin monitoring optical module by the power failure of described watchdog circuit is exported the described optical network unit control signal of restarting by the power failure comparison output pin of described watchdog circuit.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103209028A (en) * | 2013-04-15 | 2013-07-17 | 浙江工业大学 | Intelligent optical network unit (ONU) optical transceiver module capable of automatically monitoring light-emitting faults |
| CN103209023A (en) * | 2013-04-15 | 2013-07-17 | 浙江工业大学 | Intelligent optical network unit (ONU) optical transceiver module capable of automatically locking and controlling emergency light emitting |
| CN103236890A (en) * | 2013-04-15 | 2013-08-07 | 浙江工业大学 | ONU (optical network unit) intelligent optical transceiver module capable of automatically closing long-emission laser device |
| CN103997696A (en) * | 2013-02-15 | 2014-08-20 | 兰蒂克德国有限责任公司 | System, method & apparatus for a rogue optics network unit |
| CN105227234A (en) * | 2015-11-03 | 2016-01-06 | 云南电网有限责任公司电力科学研究院 | A kind of detection method of long hair light faulted ONU |
| CN105472482A (en) * | 2014-08-18 | 2016-04-06 | 中兴通讯股份有限公司 | Method of recognizing state of optical module in ONU (Optical Network Unit) and ONU |
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| CN106374999A (en) * | 2015-07-22 | 2017-02-01 | 鸿富锦精密工业（深圳）有限公司 | Optical network unit (ONU) and abnormity overtime luminescence detection method thereof |
| US9722695B2 (en) | 2015-07-22 | 2017-08-01 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Optical network unit and optical detecting method |
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| WO2020083319A1 (en) * | 2018-10-25 | 2020-04-30 | 中兴通讯股份有限公司 | Burst-type long luminescence interference onu positioning method and apparatus |
| US11101886B1 (en) | 2020-02-24 | 2021-08-24 | Realtek Semiconductor Corp. | Optical network device with abnormal light emission detection |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060093356A1 (en) * | 2004-10-28 | 2006-05-04 | Vereen Jerry D | Optical network that detects and removes Rogue ONTS |
| CN101710847A (en) * | 2009-12-09 | 2010-05-19 | 中兴通讯股份有限公司 | Failure detection and control method of optical network unit and optical network unit |
| CN101820316A (en) * | 2009-02-27 | 2010-09-01 | ***通信集团公司 | Method for closing constant optical network unit and optical network unit thereof |
| CN101820558A (en) * | 2010-04-23 | 2010-09-01 | 烽火通信科技股份有限公司 | Method for detecting long luminance ONU in passive optical network |
| CN102142897A (en) * | 2011-03-29 | 2011-08-03 | 华为技术有限公司 | Detection method and device of ONU (optical network unit) as well as passive optical network system |
| CN102324970A (en) * | 2011-07-18 | 2012-01-18 | 成都优博创技术有限公司 | Monitoring device and method for working state of ONU (Optical Network Unit) transmitting end |
-
2012
- 2012-11-06 CN CN201210437525.2A patent/CN102916742B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060093356A1 (en) * | 2004-10-28 | 2006-05-04 | Vereen Jerry D | Optical network that detects and removes Rogue ONTS |
| CN101820316A (en) * | 2009-02-27 | 2010-09-01 | ***通信集团公司 | Method for closing constant optical network unit and optical network unit thereof |
| CN101710847A (en) * | 2009-12-09 | 2010-05-19 | 中兴通讯股份有限公司 | Failure detection and control method of optical network unit and optical network unit |
| CN101820558A (en) * | 2010-04-23 | 2010-09-01 | 烽火通信科技股份有限公司 | Method for detecting long luminance ONU in passive optical network |
| CN102142897A (en) * | 2011-03-29 | 2011-08-03 | 华为技术有限公司 | Detection method and device of ONU (optical network unit) as well as passive optical network system |
| CN102324970A (en) * | 2011-07-18 | 2012-01-18 | 成都优博创技术有限公司 | Monitoring device and method for working state of ONU (Optical Network Unit) transmitting end |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997696A (en) * | 2013-02-15 | 2014-08-20 | 兰蒂克德国有限责任公司 | System, method & apparatus for a rogue optics network unit |
| CN103997696B (en) * | 2013-02-15 | 2019-11-19 | 领特贝特林共有限责任两合公司 | System, method and device for rogue's optical network unit |
| CN103209028A (en) * | 2013-04-15 | 2013-07-17 | 浙江工业大学 | Intelligent optical network unit (ONU) optical transceiver module capable of automatically monitoring light-emitting faults |
| CN103209023A (en) * | 2013-04-15 | 2013-07-17 | 浙江工业大学 | Intelligent optical network unit (ONU) optical transceiver module capable of automatically locking and controlling emergency light emitting |
| CN103236890A (en) * | 2013-04-15 | 2013-08-07 | 浙江工业大学 | ONU (optical network unit) intelligent optical transceiver module capable of automatically closing long-emission laser device |
| CN105472482B (en) * | 2014-08-18 | 2020-03-17 | 中兴通讯股份有限公司 | Method for identifying state of optical module in ONU (optical network Unit) and ONU |
| CN105472482A (en) * | 2014-08-18 | 2016-04-06 | 中兴通讯股份有限公司 | Method of recognizing state of optical module in ONU (Optical Network Unit) and ONU |
| CN106374999B (en) * | 2015-07-22 | 2019-06-21 | 鸿富锦精密工业（深圳）有限公司 | Optical network unit and its abnormal overtime luminous detection method |
| US9722695B2 (en) | 2015-07-22 | 2017-08-01 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Optical network unit and optical detecting method |
| CN106374999A (en) * | 2015-07-22 | 2017-02-01 | 鸿富锦精密工业（深圳）有限公司 | Optical network unit (ONU) and abnormity overtime luminescence detection method thereof |
| CN105227234A (en) * | 2015-11-03 | 2016-01-06 | 云南电网有限责任公司电力科学研究院 | A kind of detection method of long hair light faulted ONU |
| CN106160855B (en) * | 2016-06-29 | 2019-04-12 | 瑞斯康达科技发展股份有限公司 | A kind of method and apparatus that detection ONU long is luminous |
| CN106160855A (en) * | 2016-06-29 | 2016-11-23 | 瑞斯康达科技发展股份有限公司 | A kind of method and apparatus detecting the luminescence of ONU length |
| WO2020083319A1 (en) * | 2018-10-25 | 2020-04-30 | 中兴通讯股份有限公司 | Burst-type long luminescence interference onu positioning method and apparatus |
| CN110048983A (en) * | 2019-04-15 | 2019-07-23 | 中天宽带技术有限公司 | A kind of synchronous method of IM/DD-OFDM passive optical network receiver |
| US11101886B1 (en) | 2020-02-24 | 2021-08-24 | Realtek Semiconductor Corp. | Optical network device with abnormal light emission detection |
| CN114336536A (en) * | 2022-03-03 | 2022-04-12 | 北京金橙子科技股份有限公司 | Safety protection method and safety protection circuit for control signal |
| CN114336536B (en) * | 2022-03-03 | 2023-01-31 | 北京金橙子科技股份有限公司 | Safety protection circuit of control signal |
| CN115633275A (en) * | 2022-11-16 | 2023-01-20 | 厦门优迅高速芯片有限公司 | ONU burst light emission detection data processing method and related equipment |
| CN115633275B (en) * | 2022-11-16 | 2023-12-01 | 厦门优迅高速芯片有限公司 | ONU (optical network Unit) burst luminescence detection data processing method and related equipment |
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