CN104218987B - 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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- CN104218987B CN104218987B CN201310209995.8A CN201310209995A CN104218987B CN 104218987 B CN104218987 B CN 104218987B CN 201310209995 A CN201310209995 A CN 201310209995A CN 104218987 B CN104218987 B CN 104218987B
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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
It relates to EPON, especially, optical link detection method, the system being related in a kind of EPON
With detector.
Background technology
According to " broadband China, light net city " strategic plan, China Telecom will realize all city light fibrillations, be that city is used
Family provides the experience of light velocity the Internet.In recent years, China Telecom actively push forward access network " light entering and copper back " build, obtain significantly into
Effect.However, with the continuous enlargement of " light entering and copper back " scale, the quantity of access node also increases severely therewith, huge access node
The problems such as power supply guarantee, optical link interruption, equipment fault can be brought.This be due to " light entering and copper back " implement before, telecom operation and maintenance
Pair as if a small amount of female office of existing network, module office and access network, maintenance process is perfect.Such site capacity is big, environment is good, closure
By force, there are sufficient back-up source guarantee, and dynamic environmental monitoring system as maintenance and support, through operation management for many years,
Maintenance of the attendant to existing network is handy.
But after " light entering and copper back ", original service mode is faced with greatly challenge：
（1）Environment-guarantee is poor
Access point is moved down so that access device walks out machine room, in various natural scenes, humiture, power supply, site
Closure etc. is compared existing equipment environment and is drastically declined, and especially projects the problems such as power issue and fiber break.Municipal works are built
If constantly, in current all kinds of failures, because the failure accounting of external environment condition problem is more than 70%.
（2）Dot number is big
Due to access point capacity between several lines between tens lines, causing number of access point rapid expanding, daily failure
Amount（Power down or high temperature impact, fiber break etc.）About 60 or so.
（3）Troubleshooting process is complicated
Former EPON（Ethernet Passive Optical Network, Ethernet passive optical network）Troubleshooting process
For：Outside line connects Trouble ticket and checks that discovering device problem turns group；Customer service control centre is manual according to No. 10000 or user's statement
Record tentatively judges failure cause, and dispatcher is manually generated fault ticket by record, distributes corresponding post and processes, while electric
Words notify the PON（Passive Optical Network, EPON）The attendant for contracting area goes out scene；Monitor
Member's prostitution tune center work order or IPOSS（IP Office Support Services）Cycle polling EPON webmasters find PING not
Large area network side failure is distributed when logical, failure distribute leaflets flow process is relative complex.
The problems referred to above are to FTTx（Fiber To The X, intelligent acess）Regular maintenance and troubleshooting bring it is larger
Pressure.
The content of the invention
The disclosure is in view of at least one of problem above proposes new technical scheme.
The disclosure provides on one side the optical link detector in a kind of EPON at it, and it can be with real-time detection
Fiber break simultaneously sends warning signal.
On the other hand the disclosure provides the optical link detection system in a kind of EPON at it, and it can be examined in real time
Survey fiber break and send warning signal.
The disclosure provides the optical link detection method in a kind of EPON at its another aspect, and it can be examined in real time
Survey fiber break and send warning signal.
According to the disclosure, there is provided the optical link detector in a kind of EPON, including：
Light receiving unit, for the optical signal in receiving light path；
Optical conversion element, for the optical signal for receiving to be converted to into the signal of telecommunication；
Signal comparing unit, for the signal of telecommunication to be compared with the threshold value of setting, to determine the type of warning；
Relay, for triggering the pulse signal of different frequency to alarm according to the type reported to the police.
In some embodiments of the present disclosure, optical signal is downlink optical signal and/or downlink optical signal.
According to the disclosure, the optical link detection system in a kind of EPON, including optical line terminal, light are additionally provided
Distributing frame, the beam splitter of one point of N, optical network unit, the first alarm and the optical link detector such as previous embodiment, light
Link probe is placed in downlink, and its one end is connected with an outfan of the beam splitter of one point of N, its other end and first
Alarm is connected, wherein, N is the integer more than or equal to 2.
In some embodiments of the present disclosure, be also provided with the up-link of system one-to-two beam splitter, second
The optical link detector of alarm and another such as previous embodiment, the input of the beam splitter of one-to-two is defeated with optical network unit
Go out end be connected, an outfan of the beam splitter of one-to-two is connected with an outfan of the beam splitter of one point of N, one-to-two divide
Another outfan of light device is connected with one end of another optical link detector, and the other end of another optical link detector and second is reported
Alert device is connected.
According to the disclosure, the optical link detection method in a kind of EPON is additionally provided, including：
Optical signal in receiving light path；
The optical signal for receiving is converted to into the signal of telecommunication；
The signal of telecommunication is compared with the threshold value of setting, to determine the type of warning；
The pulse signal of different frequency is triggered to alarm according to the type reported to the police.
In some embodiments of the present disclosure, optical signal is downlink optical signal and/or downlink optical signal.
In the technical scheme of the disclosure, due to being provided with optical link detector in EPON, it can pass through
The power of optical signal in electrical signal detection light path after conversion, may determine whether to send alarm by comparing, if sending announcement
It is alert, it may also be determined that going out the rank of alarm, and then can in time notify that operation maintenance personnel is overhauled to failure.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding of the disclosure, constitutes the part of the application.Attached
In figure：
Fig. 1 is the structural representation of the optical link detector in the EPON of disclosure one embodiment.
Fig. 2 is the principle schematic that optical detection is realized in the disclosure.
Fig. 3 is the basic circuit structure figure of the burst luminous signal power detection of disclosure one embodiment.
Fig. 4 is the structural representation of the optical link detection system in the EPON of disclosure one 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 disclosure one embodiment.
Specific embodiment
The disclosure is described below with reference to accompanying drawings.It should be noted that description below is only in itself explanatory and shows
Example property, never as to the disclosure and its application or any restriction for using.Unless stated otherwise, otherwise, implementing
The part illustrated in example and the positioned opposite and numerical expression and numerical value of step are not intended to 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 be meant as in appropriate circumstances
A part for description.
In order to solve the problems of the prior art, the disclosure is that the optical link under EPON is interrupted to carry out effectively
Monitoring, successfully have developed optical link detector, and it can effectively ensure the Effec-tive Function of EPON.
Fig. 1 is the structural representation of the optical link detector in the EPON of disclosure one embodiment.
As shown in figure 1, the optical link detector 10 in the embodiment can include light receiving unit 102, optical conversion element
104th, signal comparing unit 106 and relay 108.Wherein,
Light receiving unit 102, for the optical signal in receiving light path, wherein, the optical signal can for downlink optical signal and/
Or downlink optical signal；
That is, the embodiment can both detect the break-make of descending optical link, it is also possible to the break-make of up optical link be detected, same
When two optical link detectors are set in the case of can also simultaneously detect the break-make of up-downgoing optical link；
Optical conversion element 104, for the optical signal for receiving to be converted to into the signal of telecommunication；
For example, the optical conversion element can be the optical-electrical converter of such as photodiode, and photodiode is reverse
The lower work of voltage effect, when not having illumination, reverse current is extremely faint, is dark current, and when having illumination, reverse current increases rapidly
It is big to tens microamperes, referred to as photoelectric current, the intensity of light is bigger, and reverse current is also bigger, and the change of light causes photodiode electricity
Rheology, this just can be converted into the signal of telecommunication, become optoelectronic sensor optical signal；
Signal comparing unit 106, for the signal of telecommunication to be compared with the threshold value of setting, to determine the class of warning
Type, for example, can arrange multiple threshold values, and the signal of telecommunication is compared with these threshold values, to determine different current demand signal correspondences
Type of alarm, specifically, type of alarm can including but not limited to interrupt red alarm and alert orange alarm；
Relay 108, for according to report to the police type to alarm trigger different frequency pulse signal, alarm according to
The different frequency of the pulse signal of reception also correspondingly sends the alarm of different frequency, has alarm to remind attendant,
And attendant can know the rank of current alarm according to the frequency of warning signal.
, due to being provided with optical link detector in EPON, it can be by the signal of telecommunication after conversion for the embodiment
The power of optical signal, may determine whether to send alarm, if sending alarm, it may also be determined that going out by comparing in detection light path
The rank of alarm, and then can in time notify that operation maintenance personnel is overhauled to failure.
Specifically, the function of signal comparing unit 106 can be illustrated by following examples.
The optical signal for detecting can be divided into three kinds of states by detector：Fail（Failure）、Warning（Alarm）And Pass
（Pass through）, Status Level can logically be respectively defined as red, orange and green, and the first two state will be sent out by alarm
Go out alarm.
For Fail（Failure）State, Warning（Alarm）State and Pass（Pass through）Defining for state is referred to down
State：
The measurement upper bound for assuming detector is L1, and it is T1 that measurement lower bound is the Pass threshold values arranged in L2, detector,
Warning threshold values are T2, and Fail threshold values are T3, and have L2<T3<T2<T1<L1, if representing the light intensity for currently measuring with P,：
（1）If P<L2, then short message alarm show fail or send the alarm audio signal that frequency is f1, be interrupt it is red
Alarm；
（2）If L2<P<T3, then short message alarm show Fail or send frequency be f1 alarm audio signal, be interruption
Redness alarm；
（3）If T3<P<T2, then short message alarm show Warning or send frequency be f2 alarm audio signal, show
Optical signal is weaker, is warning orange alarm；
（4）If T2<P<T1, then be Pass, is not normally alerted；
（5）If T1<P<L1, then short message alarm show Warning or send frequency be f3 alarm audio signal, show
Optical signal is too strong, is warning orange alarm；
（6）If P>L1, because optical signal is too strong, beyond the receiving sensitivity of receiving terminal, can produce error code, user and fall
Line, optical receiver is even burnt out, so as to cause optical link to interrupt, therefore short message alarm shows Fail or sends the announcement that frequency is f4
Alert audio signal, is to interrupt red alarm.
Illustrate, by taking 1490nm wavelength as an example（Receiving sensitivity scope is -27dbm to+7dbm）, the measurement of detector
Lower limit L2=-40dBm, measures upper limit L1=+15dBm, and its power threshold is set to into the T1=-4.5dBm of upper figure, T2=-
22.5dBm, T3=-25.5dBm.
（1）Actual power P=-48dBm of 1490nm wavelength is assumed in circuit or during without light, due to -48dBm<-40dBm（P
<L2）, then detection alarm display Fail, as red to interrupt alarm.
（2）When assuming actual power P=-34.1dBm of 1490nm wavelength in circuit, due to -40dBm<-34.1dBm<-
25.5dBm（L2<P<T3）, then alarm is shown as Fail, as red to interrupt alarm.
（3）When assuming actual power P=-24.7dBm of 1490nm wavelength in circuit, due to -25.5dBm<-24.7dBm<-
22.5dBm（T3<P<T2）, then alert and show Warning（low）, the big alarm of as orange luminous power attenuation.
（4）When assuming actual power P=-8.6dBm of 1490nm wavelength in circuit, due to -22.5dBm<-8.6dBm<-
4.5dBm（T2<P<T1）, then it is Pass states, do not alert.
（5）When assuming actual power P=-3.25dBm of 1490nm wavelength in circuit, due to -4.5dBm<-3.25dBm<+
15dBm（T1<P<L1）, then alert and show Warning（high）, represent the too strong alarm of red luminous power.
（6）When assuming actual power P=+17dBm of 1490nm wavelength in circuit, due to+17dBm>+15dBm（P>L1）,
Then alarm shows Fail, represents the too strong alarm of red luminous power.
In actual applications, above-mentioned each threshold value can be arranged according to the concrete scene of circuit.Rule of thumb, in ONU
（Optical Network Terminal, optical network unit）Before we are it is generally desirable to the scope of luminous power is in circuit：
Up 1310nm：- 5dBm～+4dBm；
Descending 1490nm：- 26dBm～-5dBm；
Descending 1550nm：- 28dBm～-5dBm.
So, the power threshold on detector can be changed by PC softwares in advance or directly using depositing in detector
The threshold value of storage, then later in the middle of actual detection, we can easily only by Short message alarm be given pass through/
Alert/unsuccessfully indicate, without being excessively concerned about that definite magnitude of power is how many.
As described above, the upward signal in PON system adopts 1310nm wavelength, downstream signal to adopt 1490nm/1550nm
Wavelength, respectively in the opposite direction along same fiber-optic transfer.G.983 guarantee that 1310nm upward signals are kept silent, until quilt
The repeating query of 1490nm/1550nm downstream signals simultaneously distributes a transmission window, it means that 1310nm upward signals light for passive,
Because must be in optical line terminal（1490nm/1550nm downstream signals）And optical network unit（1310nm upward signals）Between set up
Communication link could measure 1310nm upward signals.Upward signal uses time division multiple acess access way by multiple optical network units
Uplink information is organized into a time division multiplex information flow to optical line terminal.In this configuration multi-upstream access is using burst
Pattern, the optical signal on circuit is burst luminous signal, correctly detects that burst luminous signal is exactly to need to detect that transmitter swashs
The average light power of luminous period living.It is above-mentioned to understand that detector test meet up 1310nm and descending 1490nm/1550nm,
The on-line testing of luminous power is realized, energy correct detection burst luminous power, optical detection principle is as shown in Figure 2.
As shown in Fig. 2 detector adopts two header structures, 10% light splitting is carried out to measurement circuit by bidirectional coupler, to upper
Row signal（1310nm）Detector is directly accessed after light splitting carries out power detection.For downstream signal（1490nm/1550nm）Point
Again with the WDM of high-isolation after light（Wavelength division Multiplexing, wavelength-division multiplex）（Generally only use
1490nm optical signals, now can be without WDM）Being respectively connected to detector again after wavelength is separated carries out power detection.Thus can
The luminous power of up-downgoing is detected simultaneously, and circuit keeps proper communication during measuring.
Fig. 3 is the basic circuit structure figure of the burst luminous signal power detection of disclosure one embodiment.
As shown in figure 3, U1 is photo-detector, U2 is the preamplifier circuit being made up of broadband operational amplifier, and U3 is
Signal-shaping network, U4 is the comparator circuit being made up of high-speed comparator, and U5 is that the pulse being made up of monostable flipflop is prolonged
When circuit, U6 is the pulsed triggering circuit being made up of D type rising edge flip-flops, and U7 is the sampling being made up of high-speed sampling keeper
Holding circuit, U8 is the signal processing control output circuit being made up of the microprocessor with analog-digital converter.
The basic thought for realizing burst luminous signal power detection is using signal conversion, signal shaping, timing synchronization, time delay
Triggering control and signal sampling keep technology, and the optical signal of high-frequency burst type is changed into into low-frequency maintainable signal of telecommunication
Impulse level, with reference to detection process, so as to realize PON system in uplink burst optical signal power detection, it was implemented
Journey is as follows：
The pre-amplification circuit U2 being made up of broadband operational amplifier is converted into the optical signal that PIN pipe U1 are received to be had
The voltage signal of linear corresponding relation, this voltage signal is respectively fed to sampling after signal-shaping network U3 shapings and keeps amplifying
The input of circuit U 7 and the comparator anode of comparison circuit U4, now U7 is in the signal sampling stage（By signal processing control
Circuit processed carries out initialization to rising edge flip-flops U6 makes U7 be in sample phase）, the comparator negative terminal of comparison circuit U4 connects one
Reference voltage is less than negative terminal voltage as the decision level for having light unglazed on circuit without anode voltage during light, and comparator output is low
Level, subsequent conditioning circuit maintains initial condition, and when there is light, positive terminal voltage is more than negative terminal voltage, the output of high-speed comparator rapidly by
It is low to uprise, a rising edge signal is produced, this rising edge signal sends into the input of pulse delay circuit U5, through pulse delay
（Delay time is determined according to signal width）The input that this rising edge signal sends into triggers circuit U6 is triggered, circuit is touched
The outfan output low level of U6 after sending out, U7 entering signals are kept for the stage wait the sampling processing of U8, are just drawn through U8 process
The watt level of burst luminous signal, then signal processing control circuit U8 is by rising edge triggers circuit U6 forced resetting（Make U7 heavy
Newly it is in sample phase）And kept for a period of time（More than the minimal sampling time of sample/hold amplifier, it is to avoid reset signal is removed
Except rear horse back just has trigger to produce, so that the sampling time not enough sample error for producing subsequent conditioning circuit）After start it is next
The sampling of individual cycle period shows.
The design focal point of circuit is the process of front end signal, i.e. preamplifier and shaping network part, and it is by PIN
（P-type-Intrinsic-N-type, p-type-intrinsic-N-type）The photo-signal that pipe is produced is converted into constant linear right with one
The voltage signal that should be related to, the quality of voltage signal will directly influence the Stability and veracity of subsequent conditioning circuit detection.
The conversion quality of signal is mainly affected by three below aspect：First, the bandwidth of amplifier, gain and noise；2nd,
The junction capacity of PIN pipes, junction resistance, dark current and noise；3rd, power supply ripple and noise, circuit noise.
Bandwidth height, the operational amplifier that gain is big and noise is little are selected based on above-mentioned consideration；PIN pipes should also select bandwidth
High, junction capacity and noise are little, should be by PIN plus reversed bias voltage, good signal shaping net in order to reduce junction capacity and noise
Network can well improve voltage signal quality.
Using above-mentioned light path and circuit design structure, the test request of photo-detector in PON system is realized, that is, realized
The correct test of luminous powers that three kinds of wavelength luminous powers are tested simultaneously, on-line testing and 1310nm upward signals happen suddenly, can make
Go out the PON system optical link detector of function admirable, facilitate the management and maintenance of PON system.
Fig. 4 is the structural representation of the optical link detection system in the EPON of disclosure one embodiment.
As shown in figure 4, the optical link detection system 40 in the embodiment can include optical line terminal 402, Optical Distribution Frame
404th, the beam splitter 406 of one point of N, optical network unit 408, the first alarm 410 and optical link detector 412, wherein, light
Link probe 412 is placed in downlink, and its one end is connected with an outfan of the beam splitter 406 of one point of N, its other end
It is connected with the first alarm 410, wherein, N is the integer more than or equal to 2.
The disclosure embodiment is proposed for first the concept of EPON optical signal detection, researches and develops its optical link detection
Device, and the detector is accessed to into as shown in Figure 41：The downlink port of the beam splitter 406 of N（Wherein, it is descending refer to one point of N point
Light device is to optical network unit direction）, its downlink optical signal is received, and the signal of telecommunication is converted into, utilize such as Short message alarm or sound
Sound the alarm such as reports to the police by the break-make alarm level of optical signal（The CMOS level letter of dry contact signal or 0～3.3V can be passed through
Number）Attendant's mobile phone and monitoring central platform are sent to, with effective guarantee optical-fiber network reliability of operation.
In the downstream direction, optical link detector receives the light wave descending all the way that separates of beam splitter of one point of N, and by its turn
The signal of telecommunication is changed to, when the signal of telecommunication is abnormal, for example, different frequencies is triggered to relay more than the measurement upper bound or less than when measuring lower bound
The pulse of rate, alarm is delivered to indicating relay by the warning information.
Further, can be with the uplink optical signal in detecting 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, also setting up in the up-link of system 50
The beam splitter 502 of one-to-two, the second alarm 504 and another optical link detector 506, the beam splitter 502 of one-to-two it is defeated
Enter end to be connected with the outfan of optical network unit 408, an outfan and the beam splitter of one point of N of the beam splitter 502 of one-to-two
502 outfan is connected, one end of another outfan of the beam splitter 502 of one-to-two and another optical link detector 506
It is connected, the other end of another optical link detector 506 is connected with the second alarm 504.
In the upstream direction, if the optical signal sent from optical network unit breaks down, optical link detector also can be examined
The exception of optical signal in optical link is measured, if optical link detector there are multiple uplink optical signal inputs, can be examined simultaneously
Survey multichannel uplink optical signal.
Further, can also be arranged on when generation optical link interrupts and send N number of pulse signal, wherein, N is more than 2, in light
When link-recovery is normal, it is also possible to send the pulse signal of 2 assigned frequencies to alarm, to indicate that link-recovery is normal.Separately
Outward, up optical link alarm and the alarm of descending optical link can also be distinguished with different umber of pulses.
Additionally, the first alarm and the second alarm in Fig. 4 and Fig. 5 is for needing unmanned and remotely control to want
Ask and specially design, it adopts the CDMA transceiver modules and high-performance 32-bit processor of technical grade, embed real time operating system,
With the input of 4 way switch amounts, 4 tunnel relay driving output interfaces and a RS232 data-interface, only need to the product with supervised
The terminal industrial control equipment of control, electrical equipment connection, user need to only arrange several simple parameters can just pass through the mobile phone reality of oneself
DATA REASONING existing to terminal unit remote, control, the transmission of data and unit exception such as are reported to the police at the remote control function, are not being changed
Under conditions of becoming the design structure of existing equipment, easily realize from wired jumping to long distance wireless.Can be widely applied to industry
The applications such as Automated condtrol, base station monitoring, center monitoring, environmental monitoring, water supply.
In actual applications, B1.1 and B1.3 are two kinds of single-mode fibers, correspondingly, 1000BASE-PX10 and 1000BASE-
PX20 is two kinds of optical modules, and up is the wavelength of 1310nm, and descending is the wavelength of 1490nm, and the transmission range of PX10/20 is distinguished
For 10 kilometers and 20 kilometers, PX10/20 optical modules can reach respectively 1:32 branch ratio, we are advanced using wherein lower all the way
The detection of row optical link, such that it is able to detect from optical line terminal to Optical Distribution Frame again to 1:32 this section of light of passive optical splitters
Physical link it is whether normal, because the purpose of the optical link detector is backbone optical path more than detection optical splitter, if visit
Backbone optical path blocking is measured, necessarily all branches under the beam splitter are all interrupted, therefore while are represented to using same light splitting
The detection of the physical optical link of the other users of device.
Light interrupts includes two implications：One is that optical fiber breaks, unglazed；Another is front end optical module（For example, in Fig. 1
The PON mouth optical modules of optical line terminal）Or the beam splitter failure of one point of N, cause unglazed.
Further, it is also possible to the first alarm and the second alarm in above-mentioned Fig. 5 is merged into into an alarm.For example,
A direction interruption or both direction can be pointed out by different pulse frequencies to interrupt.If descending normal, and
It is up to can't detect optical signal, represent the branch optical fiber or optical network unit under beam splitter and there occurs failure.
Above-mentioned optical link detector can use FPGA（Field Programmable Gate Array, field-programmable
Gate array）+ARM（Asynchronous Response Mode, asynchronous response mode）Scheme realizing, it is internal by calculating
Whether the relation of data is judging optical fiber can normal work.The type selecting of whole system is focused on selecting industrial class device, to ensure to be
System being capable of normal operation under severe outdoor environment.
Fig. 6 is the schematic flow sheet of the optical link detection method in the EPON of disclosure one embodiment.
As shown in fig. 6, the embodiment may comprise steps of：
S602, the optical signal in receiving light path；
S604, by the optical signal for receiving the signal of telecommunication is converted to；
S606, the signal of telecommunication is compared with the threshold value of setting, to determine the type of warning；
S608, according to the type reported to the police the pulse signal of different frequency is triggered to alarm.
, due to being provided with optical link detector in EPON, it can be by the signal of telecommunication after conversion for the embodiment
The power of optical signal, may determine whether to send alarm, if sending alarm, it may also be determined that going out by comparing in detection light path
The rank of alarm, and then can in time notify that operation maintenance personnel is overhauled to failure.
Wherein, optical signal is downlink optical signal and/or downlink optical signal.
It is pointed out that above-mentioned optical link detector can be applied to into FTTN（Fiber To The Node, optical fiber
To node）Outdoor cabinet, cell machine room or E classes are handed over machine room upper and I and II light.
Specifically, FTTN outdoor cabinets combine rotating ring note/voice guard using the optical link detector, realize equipment
The monitor in real time such as power down, high temperature, water logging, fiber break, improve maintenance efficiency.With reference to the note/voice guard of current deployment,
The fibre-optic terminuss detector is connected to note/voice guard, easy to use and flexible.
Optical line terminal above trunk optical fiber can be monitored when cell machine room or E classes are with machine room upper application.
When the friendship of I and II light is applied to, the beam splitter of one-to-two can be connected to and the break-make of up optical link is judged.
It will appreciated by the skilled person that realize the whole and part steps of said method embodiment can pass through
Completing, aforesaid program can be stored in a computing device read/write memory medium the related hardware of programmed instruction, the journey
Sequence upon execution, performs the step of including said method embodiment, and aforesaid storage medium can include ROM, RAM, magnetic disc
It is various with CD etc. can be with the medium of store program codes.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and it
The difference of his embodiment, identical and similar part can be with cross-reference between each embodiment.For device embodiment
For, due to itself and embodiment of the method basic simlarity, so description is fairly simple, related part may refer to embodiment of the method
Partial explanation.
For disclosure above-described embodiment hinge structure, with advantages below：
（1）Optimization troubleshooting process
Control point is released from the beginning of warning information is produced to last alarm, and any one middle link can be realized
The closed loop control of operation flow, i.e. when the fiber break of control point, Short message alarm can automatically send alarm message to correlation
On the mobile phone of attendant, meanwhile, warning information also can show and be sent to the comprehensive adjusting system shape of telecommunications on message monitoring platform
Into auto form delivering.If alarm clearing, control point recovering state is normal, and Short message alarm can send alarm and release note to phase
On the personnel's mobile phone of pass, meanwhile, Short message alarm can also alert the short message sending for releasing to monitor supervision platform and be sent to comprehensive tune and be
System, it is achieved that fiber break alarm automatic early discovery, change from passive to active, originally fully rely on visitor tune, outside line or
The Shen of user is accused and just goes to process, and is processed rapidly if the fiber break information of the device transmission that receives the report for police service now, is lifted user and is perceived.
（1a）Produce warning information：
When the equipment running status or environment parameter of control point produce exception（Refer to that the control point occurs power down, high temperature etc. different
Normal information, the detection of this detector is fiber break information）When, Short message alarm can automatically send a warning message note to correlation
On the mobile phone of attendant, meanwhile, warning information also can show and be sent to comprehensive adjusting system on message monitoring platform（In note
The number for receiving mobile phone and monitor supervision platform note cat is pre-seted in alarm, what Surveillance center received is monitor supervision platform information,
It is here to send two identical short messages simultaneously to attendant's mobile phone and monitor supervision platform note cat）Form group automatically
It is single.
（1b）Receive warning information：
Warning information is sent on monitoring personnel mobile phone and forms auto form delivering, related personnel by comprehensive adjusting system simultaneously
According to warning information（The light path alarm that this detector is detected includes alarm time, control point, the information that other sensors are reported
Such as power supply, temperature）Judge alarm type, determine alarming processing mode.
Prevent related personnel's mobile phone occur shutdown, power-off, not at one's side situations such as, cause the warning information of note cannot be by
See in time, while reporting synthesis scheduling system to form auto form delivering to related machine room person liable by related platform.
（1c）Alarm clearing：
If alarm clearing, control point recovering state is normal.Short message alarm can send alarm and release note to relevant people
On member's mobile phone, meanwhile, Short message alarm also can will alert the short message sending for releasing to monitor supervision platform and be sent to comprehensive adjusting system.
（2）Save maintenance cost
Many FTTN Cabinets are more remote, and in the wild, so surrounding enviroment are very severe.And in this all-in-one
The nearby network of resident and speech business are connected to, so maintenance of the attendant to such all-in-one is inconvenient.Because being inclined
Remote area, rare people safeguards, so power-off fault, municipal works that some areas the aging grade of supply line occur and cause often
Road excavation causes the failures such as fiber break, causes the outdoor integrated machine cabinet cannot normal work.Attendant is difficult to determine failure
Phenomenon, only rushes for in-situ processing, increases maintenance cost.After optical link detector and Short message alarm is mounted with, when certain machine
When cabinet occurs again fiber break or device looses power, attendant can receive the note of related alarm, and in the very first time failure is determined
Reason, it is determined whether be necessary to rush for scene so that maintenance cost greatly reduces.
（3）Improve maintenance efficiency
By install alarm Cabinet and without be analyzed, discovery has the rack operation conditions of alarm
The Cabinet without alarm is substantially better than, main cause is：Process in time and have a power failure or equipment high temperature alarm, particularly optical fiber
In have no progeny, accurately reported to the police in time, related maintenance personnel can in time rush towards scene, in the very first time that troubleshooting is extensive
It is multiple, effectively reduce failure and last.
Although describing the disclosure with reference to exemplary embodiment, it should be appreciated that the disclosure is not limited to above-mentioned exemplary
Embodiment.It will be obvious to those skilled in the art that can change under conditions of without departing substantially from the scope of the present disclosure and spirit
Exemplary embodiments mentioned above.The scope of appended claim should be endowed most wide explanation, such to repair comprising all
The 26S Proteasome Structure and Function for changing and being equal to.
Claims (4)
1. the optical link detection system in a kind of EPON, it is characterised in that including optical line terminal, Optical Distribution Frame, one
Beam splitter, optical network unit, the first alarm and the optical link detector of N, the optical link detector is divided to be placed in descending chain
Lu Zhong, its one end is connected with an outfan of the beam splitter of one point of N, and its other end is connected with first alarm,
Wherein, N is the integer more than or equal to 2；
Wherein, the optical link detector includes：
Light receiving unit, for the downlink optical signal in receiving light path；
Optical conversion element, for the downlink optical signal for receiving to be converted to into the signal of telecommunication；
Signal comparing unit, for the corresponding signal of telecommunication of the downlink optical signal to be compared with the threshold value of setting, to determine
The type of warning；
Relay, for triggering the pulse signal of different frequency to first alarm according to the type reported to the police.
2. the optical link detection system in EPON according to claim 1, it is characterised in that in the system
Be also provided with beam splitter, the second alarm and another optical link detector of one-to-two in up-link, the one-to-two point
The input of light device is connected with the outfan of the optical network unit, an outfan of the beam splitter of the one-to-two with it is described
One outfan of the beam splitter of one point of N is connected, another outfan of the beam splitter of the one-to-two and another optical link
One end of detector is connected, and the other end of another optical link detector is connected with second alarm；
Another optical link detector includes：
Light receiving unit, for the uplink optical signal in receiving light path；
Optical conversion element, for the uplink optical signal for receiving to be converted to into the signal of telecommunication；
Signal comparing unit, for the corresponding signal of telecommunication of the uplink optical signal to be compared with the threshold value of setting, to determine
The type of warning；
Relay, for triggering the pulse signal of different frequency to second alarm according to the type reported to the police.
3. the light chain in a kind of EPON of the optical link detection system in EPON based on described in claim 1
Road detection method, it is characterised in that include：
Downlink optical signal in the optical link detector receiving light path；
The downlink optical signal for receiving is converted to the signal of telecommunication by the optical link detector；
The optical link detector is compared the corresponding signal of telecommunication of the downlink optical signal with the threshold value of setting, to determine report
Alert type；
The optical link detector triggers the pulse signal of different frequency according to the type reported to the police to first alarm.
4. the optical link detection method in EPON according to claim 3, it is characterised in that in the system
Be also provided with beam splitter, the second alarm and another optical link detector of one-to-two in up-link, the one-to-two point
The input of light device is connected with the outfan of the optical network unit, an outfan of the beam splitter of the one-to-two with it is described
One outfan of the beam splitter of one point of N is connected, another outfan of the beam splitter of the one-to-two and another optical link
One end of detector is connected, and the other end of another optical link detector is connected with second alarm；
Methods described also includes：
Uplink optical signal in another optical link detector receiving light path；
The uplink optical signal for receiving is converted to the signal of telecommunication by another optical link detector using photodiode；
Another optical link detector is compared the corresponding signal of telecommunication of the uplink optical signal with the threshold value of setting, with true
The fixed type reported to the police；
Another optical link detector triggers the pulse signal of different frequency according to the type reported to the police to second alarm.
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| CN201310209995.8A CN104218987B (en) | 2013-05-31 | 2013-05-31 | Optical link detecting method, system and detector in passive optical network |
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| CN104902239B (en) * | 2015-06-03 | 2018-10-26 | 北京润光泰力科技发展有限公司 | High severity alarm transmission method, high speed optoelectronic conversion equipment and system |
| CN105204398A (en) * | 2015-07-31 | 2015-12-30 | 许继集团有限公司 | Optical modulated signal communication and conversion device and converter valve control and protection system |
| CN108599837B (en) * | 2018-03-22 | 2019-12-03 | 烽火通信科技股份有限公司 | A kind of restoration methods and system of optical module signal interruption |
| CN113689116A (en) * | 2021-08-23 | 2021-11-23 | 上海领路人照明工程有限公司 | Automatic early warning and order dispatching method and system |
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