CN104218987A - Optical link detecting method, system and detector in passive optical network - Google Patents
Optical link detecting method, system and detector in passive optical network Download PDFInfo
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- CN104218987A CN104218987A CN201310209995.8A CN201310209995A CN104218987A CN 104218987 A CN104218987 A CN 104218987A CN 201310209995 A CN201310209995 A CN 201310209995A CN 104218987 A CN104218987 A CN 104218987A
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Abstract
The disclosure relates to an optical link detecting method, system and detector in a passive optical network. The detector includes an optical receiving unit, for receiving an optical signal in an optical path; an optical conversion unit, for converting the received optical signal into an electrical signal; a signal comparing unit, for comparing the electrical signal with a set threshold value to determine the type of an alarm; and relay, for triggering pulse signals of different frequencies to an alarm apparatus according to the type of the alarm. The disclosure can detect optical fiber interrupt in real time and issue an alarm signal.
Description
Technical field
The disclosure relates to EPON, especially, relates to optical link detection method, system and the detector in a kind of EPON.
Background technology
According to " broadband China, light net city " strategic plan, China Telecom will realize the fiberize of all cities, for urban subscriber provides light velocity the Internet to experience.In recent years, " light entering and copper back " that China Telecom actively pushes forward Access Network is built, and obtains remarkable effect.But along with the continuous enlargement of " light entering and copper back " scale, the quantity of access node also increases severely thereupon, huge access node can bring the problems such as power supply guarantee, optical link interruption, equipment fault.This is due to before " light entering and copper back " implement, telecom operation and maintenance to as if a small amount of female office of existing network, modular bureau and Access Network, maintenance process is perfect.Such site capacity is large, environment good, closure is strong, have sufficient back-up source guarantee, and dynamic environmental monitoring system is as maintenance and support, and through operation management for many years, the maintenance of attendant to existing network is handy.
But after " light entering and copper back ", original service mode is faced with great challenge:
(1) environment-guarantee is poor
Access point moves down, and makes access device walk out machine room, and be arranged in various natural scene, humiture, power supply, site closure etc. are compared existing equipment environment and sharply declined, and the problem such as power issue and fiber break is especially outstanding.Municipal engineering construction is continuous, in current all kinds of fault, because the fault accounting of external environment condition problem is more than 70%.
(2) dot number is large
Because access point capacity is between a few line to tens lines, cause number of access point rapid expanding, the fault amount (power down or temperatures involved, fiber break etc.) about about 60 of every day.
(3) troubleshooting process is complicated
Former EPON(Ethernet Passive Optical Network, Ethernet passive optical network) troubleshooting process is: outside line connects Trouble ticket and checks that discovering device problem turns group; Customer service control centre states hand-kept according to No. 10000 or user and tentatively judges failure cause, dispatcher generates fault ticket by record is manual, distribute the process of corresponding post, simultaneously this PON(Passive Optical Network of Advise By Wire, EPON) attendant that contracts district goes out scene; Monitor staff receives lodgers tune center work order or IPOSS(IP Office Support Services) cycle polling EPON webmaster distributes large area network side fault when finding that PING is obstructed, and fault sends single process relative complex.
The problems referred to above to FTTx(Fiber To The X, intelligent acess) regular maintenance and troubleshooting bring larger pressure.
Summary of the invention
The disclosure proposes new technical scheme in view of at least one in above problem.
The disclosure provides the optical link detector in a kind of EPON in one, and it can detection fiber interrupt and send alarm signal in real time.
The disclosure provides the optical link detection system in a kind of EPON on the other hand at it, it can detection fiber interrupt and send alarm signal in real time.
The disclosure provides the optical link detection method in a kind of EPON in it is another, and it can detection fiber interrupt and send alarm signal in real time.
According to the disclosure, the detector of the optical link in a kind of EPON is provided, comprises:
Light receiving unit, for the light signal in receiving light path;
Optical conversion element, for being converted to the signal of telecommunication by the light signal received;
Signal comparing unit, for the threshold value of the described signal of telecommunication and setting being compared, to determine the type of reporting to the police;
Relay, for triggering the pulse signal of different frequency to alarm according to the type of reporting to the police.
In embodiments more of the present disclosure, light signal is downlink optical signal and/or downlink optical signal.
According to the disclosure, additionally provide the optical link detection system in a kind of EPON, comprise optical line terminal, Optical Distribution Frame, the optical splitter of one point of N, optical network unit, the first alarm and the optical link detector as previous embodiment, optical link detector is placed in down link, its one end is connected with an output of the optical splitter of one point of N, its other end is connected with the first alarm, wherein, N be more than or equal to 2 integer.
In embodiments more of the present disclosure, the optical splitter of one-to-two, the second alarm is also provided with and another is as the optical link detector of previous embodiment in the up link of system, the input of the optical splitter of one-to-two is connected with the output of optical network unit, an output of the optical splitter of one-to-two is connected with an output of the optical splitter of one point of N, another output of the optical splitter of one-to-two is connected with one end of another optical link detector, and the other end of another optical link detector is connected with the second alarm.
According to the disclosure, additionally provide the optical link detection method in a kind of EPON, comprising:
Light signal in receiving light path;
The light signal received is converted to the signal of telecommunication;
The threshold value of the described signal of telecommunication and setting is compared, to determine the type of reporting to the police;
Trigger the pulse signal of different frequency to alarm according to the type of reporting to the police.
In embodiments more of the present disclosure, light signal is downlink optical signal and/or downlink optical signal.
In technical scheme of the present disclosure, owing to being provided with optical link detector in EPON, it can by the power of light signal in the electrical signal detection light path after conversion, by relatively determining whether to send alarm, if send alarm, the rank of alarm can also be determined, and then can notify that operation maintenance personnel is overhauled fault in time.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the disclosure, forms a application's part.In the accompanying drawings:
Fig. 1 is the structural representation of the optical link detector in the EPON of a disclosure embodiment.
Fig. 2 is the principle schematic realizing optical detection in the disclosure.
Fig. 3 is the basic circuit structure figure of the burst luminous signal power detection of a disclosure embodiment.
Fig. 4 is the structural representation of the optical link detection system in the EPON of a disclosure embodiment.
Fig. 5 is the structural representation of the optical link detection system in the EPON of another embodiment of the disclosure.
Fig. 6 is the schematic flow sheet of the optical link detection method in the EPON of a disclosure embodiment.
Embodiment
Below with reference to accompanying drawings the disclosure is described.It should be noted that following being described in is only explanatory and exemplary in essence, never as any restriction to the disclosure and application or use.Unless stated otherwise, otherwise positioned opposite and numerical expression and the numerical value of the parts of setting forth in an embodiment and step do not limit the scope of the present disclosure.In addition, technology well known by persons skilled in the art, method and apparatus may not be discussed in detail, but are intended to the part becoming specification in appropriate circumstances.
In order to solve the problems of the prior art, the disclosure is interrupt effectively monitoring to the optical link under EPON, and successfully have developed optical link detector, it can ensure the Effec-tive Function of EPON effectively.
Fig. 1 is the structural representation of the optical link detector in the EPON of a disclosure embodiment.
As shown in Figure 1, the optical link detector 10 in this embodiment can comprise light receiving unit 102, optical conversion element 104, signal comparing unit 106 and relay 108.Wherein,
Light receiving unit 102, for the light signal in receiving light path, wherein, this light signal can be downlink optical signal and/or downlink optical signal;
That is, this embodiment both can detect the break-make of descending optical link, also can detect the break-make of up optical link, can also detect the break-make of up-downgoing optical link when arranging two optical link detectors at the same time simultaneously;
Optical conversion element 104, for being converted to the signal of telecommunication by the light signal received;
Such as, this optical conversion element can be the optical-electrical converter of such as photodiode, and photodiode works under reverse voltage effect, when not having illumination, reverse current is extremely faint, is dark current, when having illumination, reverse current increases to rapidly tens microamperes, is called photoelectric current, and the intensity of light is larger, reverse current is also larger, the change of light causes photodiode current to change, and this just can convert the signal of telecommunication to light signal, becomes optoelectronic sensor;
Signal comparing unit 106, for the threshold value of the described signal of telecommunication and setting is compared, to determine the type of reporting to the police, such as, multiple threshold value can be set, the signal of telecommunication and these threshold values are compared, to determine the type of alarm that different current demand signal is corresponding, particularly, type of alarm can include but not limited to interrupt red alarm and warning orange alarm;
Relay 108, for triggering the pulse signal of different frequency to alarm according to the type of reporting to the police, alarm also correspondingly sends the alarm of different frequency according to the different frequency of the pulse signal received, to remind attendant to have alarm to occur, and attendant can know the rank of current alarm according to the frequency of alarm signal.
This embodiment owing to being provided with optical link detector in EPON, it can by the power of light signal in the electrical signal detection light path after conversion, by relatively determining whether to send alarm, if send alarm, the rank of alarm can also be determined, and then can notify that operation maintenance personnel is overhauled fault in time.
Particularly, can be described by the function of following example to signal comparing unit 106.
The light signal detected can be divided into three kinds of state: Fail(failure by detector), Warning(alarm) and Pass(pass through), Status Level logically can be defined as redness, orange and green respectively, and the first two state will send alarm by alarm.
For Fail(failure) state, Warning(alarm) state and Pass(pass through) defining of state can with reference to following:
Suppose that the measurement upper bound of detector is L1, measurement lower bound is L2, the Pass threshold value arranged in detector is T1, Warning threshold value is T2, Fail threshold value is T3, and have L2<T3<T2<T1LEssT. LTssT.LTL1, if represent the current luminous intensity recorded with P, then:
(1) if P<L2, then short message alarm shows fail or sends the alarm audio signal that frequency is f1, for interrupting red alarm;
(2) if L2<P<T3, then short message alarm shows Fail or sends the alarm audio signal that frequency is f1, for interrupting red alarm;
(3) if T3<P<T2, then short message alarm shows Warning or sends the alarm audio signal that frequency is f2, shows that light signal is more weak, is warning orange alarm;
(4) if T2<P<T1, be then Pass, normally not alarm;
(5) if T1<P<L1, then short message alarm shows Warning or sends the alarm audio signal that frequency is f3, shows that light signal is excessively strong, is warning orange alarm;
(6) if P>L1, because light signal is too strong, beyond the receiving sensitivity of receiving terminal, error code can be produced, user goes offline, even burn out optical receiver, thus cause optical link to interrupt, therefore short message alarm shows Fail or sends the alarm audio signal that frequency is f4, for interrupting red alarm.
Illustrate, for 1490nm wavelength (receiving sensitivity scope is-27dbm to+7dbm), the measurement lower limit L2=-40dBm of detector, measure upper limit L1=+15dBm, and its power threshold is set to the T1=-4.5dBm of upper figure, T2=-22.5dBm, T3=-25.5dBm.
(1) suppose 1490nm wavelength in circuit actual power P=-48dBm or unglazed time, due to-48dBm<-40dBm(P<L2), then detection alarm display Fail, is and red interrupts alarm.
(2) when supposing the actual power P=-34.1dBm of 1490nm wavelength in circuit, due to-40dBm<-34.1dBm<-25.5dBm(L2LEss T.LTssT.LTP<T3), then alarm is shown as Fail, is red interruption alarm.
(3) when supposing the actual power P=-24.7dBm of 1490nm wavelength in circuit, due to-25.5dBm<-24.7dBm<-22.5dBm(T3LE ssT.LTssT.LTP<T2), then alarm display Warning(low), be the large alarm of orange-colored light power attenuation.
(4) when supposing the actual power P=-8.6dBm of 1490nm wavelength in circuit, due to-22.5dBm<-8.6dBm<-4.5dBm(T2LEss T.LTssT.LTP<T1), be then Pass state, not alarm.
(5) when supposing the actual power P=-3.25dBm of 1490nm wavelength in circuit, due to-4.5dBm<-3.25dBm<+15dBm(T1LEssT .LTssT.LTP<L1), then alarm display Warning(high), represent that red light power crosses strong alarm.
(6) when supposing the actual power P=+17dBm of 1490nm wavelength in circuit, due to+17dBm>+15dBm(P>L1), then alarm display Fail, represents that red light power crosses strong alarm.
In actual applications, can according to the above-mentioned each threshold value of the concrete scene setting of circuit.Rule of thumb, at ONU(Optical Network Terminal, optical network unit) we generally wish that the scope of luminous power in circuit is before:
Up 1310nm:-5dBm ~+4dBm;
Descending 1490nm:-26dBm ~-5dBm;
Descending 1550nm:-28dBm ~-5dBm.
So, can the power threshold on detector be revised by PC software in advance or directly use the threshold value stored in detector, so in the middle of actual detection, what we can provide only by Short message alarm easily passes through/alarm/unsuccessfully indicate, and too need not be concerned about that definite magnitude of power is how many.
As mentioned above, the upward signal in PON system adopts 1310nm wavelength, and downstream signal adopts 1490nm/1550nm wavelength, respectively in the opposite direction along same Optical Fiber Transmission.G.983 guarantee that 1310nm upward signal is kept silent, until distributed a transmission window by the repeating query of 1490nm/1550nm downstream signal, this means that 1310nm upward signal is passive luminescence, because communication link must be set up between optical line terminal (1490nm/1550nm downstream signal) and optical network unit (1310nm upward signal) could measure 1310nm upward signal.Upward signal uses time division multiple access access way the uplink information of multiple optical network unit to be organized into a time division multiplexing information flow to optical line terminal.Multi-upstream access adopts burst mode in such an embodiment, and the light signal on circuit is burst luminous signal, correctly detects that burst luminous signal is exactly need to detect that transmitter activates the average light power between light emission period.Above-mentioned known detector test should meet up 1310nm and descending 1490nm/1550nm, realizes the on-line testing of luminous power, and energy correct detection burst luminous power, optical detection principle as shown in Figure 2.
As shown in Figure 2, detector adopts two header structures, carries out 10% light splitting by bidirectional coupler to measurement circuit, carries out power detection to Access Probe device direct after upward signal (1310nm) light splitting.For the WDM(Wavelength division Multiplexing using high-isolation after downstream signal (1490nm/1550nm) light splitting again, wavelength division multiplexing) (usually only use 1490nm light signal, now can without WDM) by wavelength separately after more respectively Access Probe device carry out power detection.So just can detect the luminous power of up-downgoing, and during measuring, circuit keeps proper communication simultaneously.
Fig. 3 is the basic circuit structure figure of the burst luminous signal power detection of a disclosure embodiment.
As shown in Figure 3, U1 is photo-detector, U2 is the preamplifier circuit be made up of broadband operational amplifier, U3 is signal-shaping network, U4 is the comparator circuit be made up of high-speed comparator, and U5 is the pulse delay circuit be made up of monostable flipflop, and U6 is the pulsed triggering circuit be made up of D type rising edge flip-flops, U7 is the sampling hold circuit be made up of high-speed sampling retainer, and U8 is that the signal transacting be made up of the microprocessor of band analog to digital converter controls output circuit.
The basic thought realizing burst luminous signal power detection utilizes signal conversion, signal shaping, timing synchronization, Time-delayed trigger to control and signal sampling maintenance technology, the light signal of high-frequency burst type is become low-frequency maintainable signal of telecommunication impulse level, in conjunction with check processing, thus realize the detection of uplink burst optical signal power in PON system, its specific implementation process is as follows:
The pre-amplification circuit U2 be made up of broadband operational amplifier converts the light signal that PIN pipe U1 receives the voltage signal with linear corresponding relation to, this voltage signal is sent into sampling respectively and is kept the input of amplifying circuit U7 and the comparator anode of comparison circuit U4 after signal-shaping network U3 shaping, now U7 is in the signal sampling stage (carrying out initialization by signal processing control circuit to rising edge flip-flops U6 makes U7 be in sample phase), the comparator negative terminal of comparison circuit U4 connects a reference voltage as decision level circuit having light unglazed, time unglazed, positive terminal voltage is less than negative terminal voltage, comparator output low level, subsequent conditioning circuit maintains reset condition, when there being light, positive terminal voltage is greater than negative terminal voltage, the output of high-speed comparator is uprised by low rapidly, produce a rising edge signal, this rising edge signal sends into the input of pulse delay circuit U5, through pulse delay (according to deration of signal determination delay time), the input that this rising edge signal sends into circuits for triggering U6 is triggered, the output output low level of U6 after circuit triggers, U7 entering signal keeps the stage to wait for the sampling processing of U8, the watt level of burst luminous signal is just drawn through U8 process, then rising edge circuits for triggering U6 forced resetting (allowing U7 again be in sample phase) keeps a period of time (being greater than the minimal sampling time of sample/hold amplifier by signal processing control circuit U8, avoiding reset signal to remove rear horse back just has triggering signal to produce, thus make sampling time deficiency produce the sample error of subsequent conditioning circuit) after start the sampling display of next cycle period.
The design focal point of circuit is the process of front end signal, namely, preamplifier and shaping network part, it is by PIN(P-type-Intrinsic-N-type, P type-intrinsic-N-type) photo-signal that produces of pipe converts the voltage signal with certain linear corresponding relation to, and the quality of voltage signal directly will have influence on the Stability and veracity that subsequent conditioning circuit detects.
The conversion quality of signal is primarily of the impact of following three aspects: one, the bandwidth of amplifier, gain and noise; Two, the junction capacitance of PIN pipe, junction resistance, dark current and noise; Three, power supply ripple and noise, circuit noise.
The operational amplifier that bandwidth is high, gain is large and noise is little is selected based on above-mentioned consideration; PIN pipe also should select that bandwidth is high, junction capacitance and noise little, in order to reduce junction capacitance and PIN should be added reversed bias voltage by noise, good signal-shaping network can improve voltage signal quality well.
Adopt above-mentioned light path and circuit design structure, achieve the test request of photo-detector in PON system, namely achieve that three kinds of wavelength light power are tested simultaneously, the correct test of on-line testing and 1310nm upward signal burst luminous power, the PON system optical link detector of function admirable can be produced, facilitate administering and maintaining of PON system.
Fig. 4 is the structural representation of the optical link detection system in the EPON of a disclosure embodiment.
As shown in Figure 4, optical link detection system 40 in this embodiment can comprise optical line terminal 402, the optical splitter 406 of Optical Distribution Frame 404, one point of N, optical network unit 408, first alarm 410 and optical link detector 412, wherein, optical link detector 412 is placed in down link, its one end is connected with an output of the optical splitter 406 of one point of N, its other end is connected with the first alarm 410, wherein, N be more than or equal to 2 integer.
This embodiment of the disclosure proposes the concept for EPON optical signal detection first, research and develop its optical link detector, and the downlink port this detector being accessed to the optical splitter 406 of 1:N as shown in Figure 4 (wherein, the optical splitter of descending finger one point of N is to optical network unit direction), receive its downlink optical signal, and convert the signal of telecommunication to, utilize the such as alarm such as Short message alarm or audible alarm that the break-make alarm level (can pass through the CMOS level signal of dry contact signal or 0 ~ 3.3V) of light signal is sent to attendant's mobile phone and Surveillance center's platform, with effective guarantee optical-fiber network reliability of operation.
In the downstream direction, the descending light wave in road that the optical splitter that optical link detector receives one point of N separates, and be converted into the signal of telecommunication, when the signal of telecommunication is abnormal, such as, be greater than and measure the upper bound or be less than the pulse triggering different frequency when measuring lower bound to relay, with indicating relay, this warning information is delivered to alarm.
Further, the uplink optical signal in all right detection system.
Fig. 5 is the structural representation of the optical link detection system in the EPON of another embodiment of the disclosure.
As shown in Figure 5, compared with the embodiment in Fig. 4, in this embodiment, the optical splitter 502 of one-to-two is also provided with in the up link of system 50, second alarm 504 and another optical link detector 506, the input of the optical splitter 502 of one-to-two is connected with the output of optical network unit 408, an output of the optical splitter 502 of one-to-two is connected with an output of the optical splitter 502 of one point of N, another output of the optical splitter 502 of one-to-two is connected with one end of another optical link detector 506, the other end of another optical link detector 506 is connected with the second alarm 504.
In the upstream direction, if the light signal sent from optical network unit breaks down, optical link detector also can detect the exception of light signal in optical link, if optical link detector has multiple uplink optical signal input, then can detect multichannel uplink optical signal simultaneously.
Further, can also be arranged on and occur to send N number of pulse signal when optical link interrupts, wherein, N is greater than 2, when optical link recovers normal, also can send the pulse signal of 2 assigned frequencies to alarm, to indicate link-recovery normal.In addition, up optical link alarm and descending optical link alarm can also be distinguished by different umber of pulses.
In addition, the first alarm in Fig. 4 and Fig. 5 and the second alarm are custom-designed for needs unattended operation and Long-distance Control requirement, it adopts CDMA transceiver module and the high-performance 32-bit processor of technical grade, embedded real time operating system, there are 4 way switch amount inputs, No. 4 relay driver output interfaces and a RS232 data-interface, only need this product and monitored terminal industrial control equipment, electric equipment connects, user only need arrange several simple parameter just can by the DATA REASONING of mobile phone realization to terminal unit remote of oneself, control, the remote control functions such as the transmission of data and unit exception warning, under the condition of project organization not changing existing equipment, light realization is from wired jumping to long distance wireless.The applications such as industrial automatic control, base station monitoring, center monitoring, environmental monitoring, water supply can be widely used in.
In actual applications, B1.1 and B1.3 is two kinds of monomode fibers, correspondingly, 1000BASE-PX10 and 1000BASE-PX20 is two kinds of optical modules, up is the wavelength of 1310nm, descending is the wavelength of 1490nm, the transmission range of PX10/20 is respectively 10 kilometers and 20 kilometers, PX10/20 optical module can reach the shunt ratio of 1:32 respectively, we use the wherein descending detection carrying out optical link in a road, thus can to detect from optical line terminal to Optical Distribution Frame again to passive optical splitters this section of optical physics link whether normal of 1:32, object due to this optical link detector is the backbone optical path of more than detection optical splitter, if detect backbone optical path to block, must all shunt under this optical splitter all interrupt, therefore represent the detection of the physical optical link to other users using same optical splitter simultaneously.
Light interrupts comprising two implications: one is that optical fiber breaks, unglazed; Another is the optical splitter fault of front end optical module (such as, the PON mouth optical module of the optical line terminal in Fig. 1) or one point of N, causes unglazed.
In addition, the first alarm in above-mentioned Fig. 5 and the second alarm can also be merged into an alarm.Such as, a direction interruption or both direction can be pointed out all to interrupt by different pulse frequencies.If normally descending, and the up light signal that can't detect, represent this shunt optical fiber or optical network unit under optical splitter and there occurs fault.
Above-mentioned optical link detector can use FPGA(Field Programmable Gate Array, field programmable gate array)+ARM(Asynchronous Response Mode, asynchronous response mode) scheme realize, judge whether optical fiber can normally work by calculating the relation of internal data.The type selecting of whole system is focused on selecting industrial class device, to ensure that system can normal operation under severe outdoor environment.
Fig. 6 is the schematic flow sheet of the optical link detection method in the EPON of a disclosure embodiment.
As shown in Figure 6, this embodiment can comprise the following steps:
S602, the light signal in receiving light path;
S604, is converted to the signal of telecommunication by the light signal received;
S606, compares the threshold value of the described signal of telecommunication and setting, to determine the type of reporting to the police;
S608, triggers the pulse signal of different frequency to alarm according to the type of reporting to the police.
This embodiment owing to being provided with optical link detector in EPON, it can by the power of light signal in the electrical signal detection light path after conversion, by relatively determining whether to send alarm, if send alarm, the rank of alarm can also be determined, and then can notify that operation maintenance personnel is overhauled fault in time.
Wherein, light signal is downlink optical signal and/or downlink optical signal.
It is pointed out that and above-mentioned optical link detector can be applied to FTTN(Fiber To The Node, Fiber-To-The-Node) outdoor cabinet, community machine room or E class hand over machine room upper and I and II light.
Particularly, FTTN outdoor cabinet utilizes this optical link detector in conjunction with rotating ring note/voice guard, realizes the monitoring in real time such as device looses power, high temperature, water logging, fiber break, improves maintenance efficiency.In conjunction with the note/voice guard disposed at present, this fibre-optic terminus detector is connected to note/voice guard, easy to use and flexible.
Can the above trunk optical fiber in monitor optical line terminal when community machine room or E class are applied with machine room upper.
When being applied to I and II light and handing over, the optical splitter of one-to-two can be connected to and judge the break-make of up optical link.
One of ordinary skill in the art will appreciate that, realize the whole of said method embodiment to have been come by the hardware that program command is relevant with part steps, aforesaid program can be stored in a computing equipment read/write memory medium, this program is when performing, perform and comprise the step of said method embodiment, and aforesaid storage medium can comprise ROM, RAM, magnetic disc and CD etc. various can be program code stored medium.
In this specification, each embodiment all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, and part identical with similar between each embodiment can cross-reference.For device embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part can see the explanation of embodiment of the method part.
Disclosure above-described embodiment hinge structure, has the following advantages:
(1) troubleshooting process is optimized
Control point is from generation warning information, remove to last alarm, any one middle link, the closed-loop control of operation flow can be realized, that is, when the fiber break of control point, Short message alarm can send alarm message automatically on the mobile phone of related maintenance personnel, meanwhile, warning information also can show on message monitoring platform and be sent to telecommunications combine adjusting system formed auto form delivering.If alarm clearing, control point recovering state is normal, Short message alarm can send alarm and remove note on related personnel's mobile phone, meanwhile, the short message sending that alarm also can be removed by Short message alarm is sent to comprehensive adjusting system to monitor supervision platform, therefore achieves the automatic early detection of fiber break alarm, change from passive to active, original rely on that visitor adjusts completely, the Shen of outside line or user accuses and just go process, the fiber break information sent as the device that receives the report for police service now then processes rapidly, lifting user awareness.
(1a) warning information is produced:
Extremely, (this control point generation power down is referred to when the equipment running status of control point or environment parameter produce, the abnormal informations such as high temperature, what this detector detected is fiber break information) time, Short message alarm can send a warning message note automatically on the mobile phone of related maintenance personnel, simultaneously, warning information also can show and be sent to comprehensive adjusting system and (in Short message alarm, pre-sets the number receiving mobile phone and monitor supervision platform note cat on message monitoring platform, what Surveillance center received is monitor supervision platform information, here send two identical short messages to attendant's mobile phone and monitor supervision platform note cat simultaneously) form auto form delivering.
(1b) receiving alarm information:
Warning information is sent on monitor staff's mobile phone and forms auto form delivering by combining adjusting system simultaneously, related personnel can (the light path alarm that this detector detects comprises alarm time, control point according to warning information, the information that other transducers report is as power supply, temperature) judge alarm type, determine alarming processing mode.
Prevent related personnel's mobile phone from occurring shutdown, power-off, the not situation such as at one's side, cause the warning information of note to be seen in time, report synthesis scheduling system formation auto form delivering to relevant machine room person liable by related platform simultaneously.
(1c) alarm clearing:
If alarm clearing, control point recovering state is normal.Short message alarm can send alarm and remove note on related personnel's mobile phone, and meanwhile, the short message sending that alarm also can be removed by Short message alarm is sent to comprehensive adjusting system to monitor supervision platform.
(2) maintenance cost is saved
Many FTTN Cabinets are comparatively remote, again in the wild, so surrounding enviroment are very severe.And be connected to network and the speech business of neighbouring resident in this all-in-one, so attendant is very inconvenient to the maintenance of this type of all-in-one.Because be remote districts, rare people safeguards, so power-off fault, municipal works road excavation that some areas often occur the aging grade of supply line and cause cause the faults such as fiber break, causes outdoor integrated machine cabinet normally to work.Attendant is difficult to determine phenomenon of the failure, only rushes for in-situ processing, increases maintenance cost.After optical link detector and Short message alarm have been installed, when fiber break or device looses power occur certain rack again, attendant can receive the note of relevant alarm, determines failure cause in the very first time, determine whether to be necessary to rush for scene, maintenance cost is greatly reduced.
(3) maintenance efficiency is improved
By the installation Cabinet of alarm and being analyzed of being unkitted, the rack operation conditions finding that there is alarm is obviously better than the Cabinet being unkitted alarm, main cause is: process in time has a power failure or equipment high temperature alarm, particularly after fiber break, accurately reported to the police in time, related maintenance personnel can rush towards scene in time, troubleshooting is recovered in the very first time, effectively reduces fault and lasts.
Although describe the disclosure with reference to exemplary embodiment, should be understood that the disclosure is not limited to above-mentioned exemplary embodiment.It will be obvious to those skilled in the art that and can revise above-mentioned exemplary embodiment under the condition not deviating from the scope of the present disclosure and spirit.The scope of appended claim should be endowed the widest explanation, to comprise all such amendments and equivalent 26S Proteasome Structure and Function.
Claims (6)
1. the optical link detector in EPON, is characterized in that, comprising:
Light receiving unit, for the light signal in receiving light path;
Optical conversion element, for being converted to the signal of telecommunication by the light signal received;
Signal comparing unit, for the threshold value of the described signal of telecommunication and setting being compared, to determine the type of reporting to the police;
Relay, for triggering the pulse signal of different frequency to alarm according to the type of reporting to the police.
2. the optical link detector in EPON according to claim 1, is characterized in that, described light signal is downlink optical signal and/or downlink optical signal.
3. the optical link detection system in an EPON, it is characterized in that, comprise optical line terminal, Optical Distribution Frame, the optical splitter of one point of N, optical network unit, the first alarm and the optical link detector according to any one of claim 1 to 2, described optical link detector is placed in down link, its one end is connected with an output of the optical splitter of described one point of N, its other end is connected with described first alarm, wherein, N be more than or equal to 2 integer.
4. the optical link detection system in EPON according to claim 3, it is characterized in that, the optical splitter of one-to-two is also provided with in the up link of described system, second alarm and another optical link detector according to any one of claim 1 to 2, the input of the optical splitter of described one-to-two is connected with the output of described optical network unit, an output of the optical splitter of described one-to-two is connected with an output of the optical splitter of described one point of N, another output of the optical splitter of described one-to-two is connected with one end of another optical link detector described, the other end of another optical link detector described is connected with described second alarm.
5. the optical link detection method in EPON, is characterized in that, comprising:
Light signal in receiving light path;
The light signal received is converted to the signal of telecommunication;
The threshold value of the described signal of telecommunication and setting is compared, to determine the type of reporting to the police;
Trigger the pulse signal of different frequency to alarm according to the type of reporting to the police.
6. the optical link detection method in EPON according to claim 5, is characterized in that, described light signal is downlink optical signal and/or downlink optical signal.
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