CN102725975B - The fault detection method of a kind of optical distribution network, device and optical network system - Google Patents
The fault detection method of a kind of optical distribution network, device and optical network system Download PDFInfo
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Abstract
The fault detection method of a kind of optical distribution network provided by the invention, device and optical network system, by being respectively provided with at least one light marker on the trunk optical fiber of described optical distribution network and each branch optical fiber, described trunk optical fiber and branch optical fiber are uniquely identified by described smooth marker by address code, send test optical signal to described optical distribution network after, the optical signal received and each smooth marker in described optical distribution network is returned is analyzed processing, and obtains the address code of described each smooth marker; The address code of each smooth marker according to described acquisition, detect whether optical fiber corresponding to described address code breaks down, solve the problem that after 0TDR in prior art cannot accurately detect beam splitter, whether each branch optical fiber breaks down, achieve detection quick, accurate and the fault of location optical distribution network, improve the stability of passive optical network PON system.
Description
Technical field
The present invention relates to optical-fiber network technical field, more particularly, it relates to the fault detection method of a kind of optical distribution network, device and optical network system.
Background technology
Along with the development of broadband technology, EPON (PassiveOpticalNetwork, PON) technology is one of current most widely used fiber to the home (FiberToTheHome, FTTH) technology. Along with the use of PON is more and more frequent, the technology whether detection PON breaks down is also more and more important. At present, optical time domain reflectometer (OpticalTimeDomainReflectometer, OTDR) is detection light path performance and the Main Means of location light path fault. When using OTDR that PON is carried out on-line checking, OTDR uses the wavelength of 1625nm/1650nm, avoids the operation wavelength of PON. OTDR enters ODN network by wave division multiplexing WDM device at OLT side joint, and during detection, optical fiber is sent the optical signal of a test by OTDR, then observes the information of return. This process can repeatedly carry out, and then these results is averaged and shows with the form of track, and this track just depicts the power of signal in whole section of optical fiber, such that it is able to realize the situation of the optical fiber link of on-line checking PON.
Common PON structure is: an optical fiber is from optical line terminal OLT through 1: 2 beam splitter or directly to building, again through the beam splitter of a big splitting ratio, each user in building of being moved into by each branch optical fiber. Big splitting ratio will result in high loss, and for improving the dynamic range of OTDR detection, the OTDR of prior art would generally adopt the test light pulse that service band is wide. But, adopt wide test light pulse that the resolution of reflection event may be made to reduce so that OTDR cannot distinguish one from the other intensive reflection peak, thus whether the breaking down of each branch optical fiber after causing OTDR beam splitter cannot accurately be detected.
Summary of the invention
In view of this, the embodiment of the present invention provides the fault detection method of a kind of optical distribution network, device and optical network system, for solving the problem that after OTDR in prior art cannot accurately detect beam splitter, whether each branch optical fiber breaks down, it is achieved thereby that quickly, accurately detect and position the fault of optical distribution network, improve the stability of passive optical network PON system.
For solving the problems referred to above, one aspect of the present invention provides the detection method of a kind of branch optical fiber, described method includes: be respectively provided with at least one light marker on the trunk optical fiber and each branch optical fiber of described optical distribution network, described trunk optical fiber and branch optical fiber are uniquely identified by described smooth marker by address code, described method includes: send optical signal to described optical distribution network, and wherein said optical signal is the optical signal of test; Receive the optical signal that each smooth marker in described optical distribution network returns, and the optical signal of described return is carried out signal processing, obtain the address code of described each smooth marker; The address code of each smooth marker according to described acquisition, detects whether optical fiber corresponding to described address code breaks down.
Another aspect of the present invention additionally provides the failure detector of a kind of optical distribution network, analyzer and at least one light marker is identified including light, described smooth marker is arranged on trunk optical fiber and each branch optical fiber of optical distribution network, described trunk optical fiber and branch optical fiber are uniquely identified by described smooth marker by address code, described light mark analyzer is positioned at local side, wherein
Described light mark analyzer, is used for sending optical signal to described optical distribution network, and wherein said optical signal is the optical signal of test; Receive the optical signal that each smooth marker in described optical distribution network returns, and the optical signal of described return is carried out signal processing, obtain the address code of described each smooth marker; The address code of each smooth marker according to described acquisition, detects whether optical fiber corresponding to described address code breaks down;
Described smooth marker, the optical signal sent for described light identifies analyzer returns to described light mark analyzer.
Another aspect of the present invention additionally provides a kind of optical network system, described optical network system includes optical line terminal, optical distribution network, and optical network unit, described optical line terminal is connected with described optical network unit by optical distribution network, described optical distribution network includes trunk optical fiber, branch optical fiber and beam splitter, it is characterized in that, described optical network system also includes: light mark analyzer and at least one light marker, described smooth marker is arranged on trunk optical fiber and each branch optical fiber of optical distribution network, described trunk optical fiber and branch optical fiber are uniquely identified by described smooth marker by address code, described light mark analyzer is positioned at local side, wherein,
Described light mark analyzer, is used for sending optical signal to described optical distribution network, and wherein said optical signal is the optical signal of test; Receive the optical signal that each smooth marker in described optical distribution network returns, and be analyzed processing to the optical signal of described return, obtain the address code of described each smooth marker; The address code of each smooth marker according to described acquisition, detects whether optical fiber corresponding to described address code breaks down;
Described smooth marker, the optical signal sent for described light identifies analyzer returns to described light mark analyzer.
The fault detection method of a kind of optical distribution network provided by the invention, device and optical network system, by being respectively provided with at least one light marker on the trunk optical fiber of described optical distribution network and each branch optical fiber, described trunk optical fiber and branch optical fiber are uniquely identified by described smooth marker by address code, send test optical signal to described optical distribution network after, the optical signal received and each smooth marker in described optical distribution network is returned is analyzed processing, and obtains the address code of described each smooth marker; The address code of each smooth marker according to described acquisition, detect whether optical fiber corresponding to described address code breaks down, solve the problem that after OTDR in prior art cannot accurately detect beam splitter, whether each branch optical fiber breaks down, achieve detection quick, accurate and the fault of location optical distribution network, improve the stability of passive optical network PON system.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The detection method flow chart of a kind of branch optical fiber that Fig. 1 provides for the embodiment of the present invention;
The structural representation of a kind of optical distribution network that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the another kind of optical distribution network that Fig. 3 provides for the embodiment of the present invention;
The failure detector structural representation of a kind of optical distribution network that Fig. 4 provides for the embodiment of the present invention;
The structural representation of a kind of optical network system that Fig. 5 provides for the embodiment of the present invention.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments. Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
The present invention proposes the fault detection method of a kind of optical distribution network, and its method flow diagram is as it is shown in figure 1, specific as follows:
Being respectively provided with at least one light marker on the trunk optical fiber and each branch optical fiber of described optical distribution network, described trunk optical fiber and branch optical fiber are uniquely identified by described smooth marker by address code, and described method includes:
S100, light mark analyzer sends optical signal to described optical distribution network, and wherein said optical signal is the optical signal of test.
S102, light mark analyzer receives the optical signal that each smooth marker in described optical distribution network returns, and the optical signal of described return is carried out signal processing, obtains the address code of described each smooth marker.
This step particularly as follows:
The light mark analyzer optical-electrical converter by self, converts the signal of telecommunication of correspondence to by the optical signal of described return; By the analog-digital converter of self, the signal of telecommunication after described conversion is converted to the digital signal of correspondence, and the digital signal after described conversion is carried out frequency component extraction; By the frequency component of described extraction, search the corresponding relation of frequency component and address code, obtain the address code corresponding with described frequency component.
The corresponding relation of wherein said frequency component and address code is stored in advance in light mark analyzer.
S104, the light mark analyzer address code according to each smooth marker of described acquisition, detects whether optical fiber corresponding to described address code breaks down.
Further, the light mark analyzer address code according to each smooth marker of described acquisition, check whether described address code list item has default address code, or whether the address code of each smooth marker of described acquisition is correct; If mistake occurs in the address code having default address code or feedback, then can accurately detect out optical fiber corresponding to described address code or beam splitter breaks down. Owing to each section of optical fiber at optical distribution network is all provided with light marker, this light marker uniquely identifies the optical fiber at described smooth marker place by address code, so being possible not only to navigate to fast and accurately by said method, which root optical fiber what concrete fault occurred be, it might even be possible to be pin-pointed in this section of optical fiber specifically which section break down.
Described method also includes:
Arranging at least one light marker at least one beam splitter of described optical distribution network, described beam splitter is uniquely identified by described smooth marker by address code. Whether the beam splitter at each smooth marker place that can also be accurately positioned in optical distribution network by above-mentioned detection method breaks down.
The address code of described smooth marker includes sector address and offset address, and wherein said sector address is used for identifying the cross sections of optical distribution network, and described offset address is used for the trunk optical fiber, branch optical fiber and the beam splitter that identify in same section.
Further, described visual analysor can also pass through to scan one by one each smooth marker of optical distribution network, after optical signal according to the return of each light marker carries out signal processing, obtain the offset address of each smooth marker, thus obtaining the presence of light identification device, adopt time division multiplexing mode can obtain the moment that each smooth marker returns simultaneously, the concrete position at optical fiber that each smooth marker is corresponding or beam splitter place is finally determined by the offset address of this light marker and time information, and each device in optical distribution network can be detected and whether optical fiber breaks down.
Introduce the structure of the address code of described cursor knowledge device and the addressing mode of described address code in detail below.
As in figure 2 it is shown, the structural representation that Fig. 2 is a kind of optical distribution network. In Fig. 2, optical distribution network includes:
The beam splitter of one 1*N, one end of described beam splitter is connected (such as local side apparatus: optical line terminal) by trunk optical fiber with local side apparatus, the other end of described beam splitter is connected with optical network unit by least two branch optical fibers, described trunk optical fiber arranges light marker 1 (OpticalIdentityequipment, this light marker is represented below) with for ID, on beam splitter, 200 arrange light marker ID2, and are respectively provided with ID3 and ID4 on branch optical fiber. wherein any one light marker ID has unique address code, for uniquely identifying optical fiber corresponding to each smooth marker and beam splitter (wherein, described beam splitter can arrange this light marker and can also be not provided with, in order to the situation of each device of optical distribution network is more precisely located, on beam splitter, all it is also provided with this light marker below), described each smooth address code corresponding for marker ID includes: sector address and offset address, wherein, described sector address is used for identifying the cross sections of optical distribution network, described offset address is used for the trunk optical fiber identifying in same section, branch optical fiber and beam splitter. it should be noted that, the form of presentation of described each smooth address code corresponding for marker ID can have multiple, its objective is the position for uniquely determining optical fiber that this light marker is corresponding and beam splitter place, so as the fault can being accurately positioned in optical distribution network and topological structure, enumerate one of which addressing mode below, but be not limited to following this mode.
(1) with in the optical distribution network shown in Fig. 2, level generally according to beam splitter divides section, trunk optical fiber before beam splitter is a section, beam splitter is originally as a section, it it is a section after beam splitter, optical distribution network shown in Fig. 2 divides the principle of section according to mentioned above principle, it is possible to be divided into three sections and one-level light splitting optical distribution network that Fig. 2 is three sections.
(2) sector address is distributed for the light marker on each section, such as, in Fig. 2, it is that the light marker on three sections sets gradually sector address, it is the ID1 dispensing section address on first section: #00, is the ID2 dispensing section address on the beam splitter of second section: #01, and be that each section is sequentially allocated a sector address at ID3 and the ID4 of the 3rd section, for instance for ID1, for ID2 dispensing section address: #01, for ID3 and ID4 dispensing section address: #02.
(3) described offset address is used for identifying trunk optical fiber in same section, branch optical fiber and beam splitter, such as shown in Fig. 2, to described ID1-ID4 primary distribution offset address, such as: the offset address of ID1 is #00, the offset address of ID2 is the offset address that offset address is #02 and ID4 of #01, ID3 is #05, owing to ID3 and ID4 belongs to same section, can be made a distinction by offset address, namely identify the branch optical fiber corresponding to ID3 and ID4 further by offset address.
In sum; can according to the coding rule of the address code of above-mentioned each smooth marker; a sector address is distributed to each section; and the offset address in the address code of described smooth marker can have following several dividing condition; but it is not limited to several situations being listed below; as long as the address code consisted of offset address and sector address can uniquely identify optical fiber or the beam splitter at described smooth marker place, belong to the protection domain of the application:
(1) it is each subsegment (i.e. each optical fiber under same section and beam splitter) allocation offsets address in a section. for the ODN section having optical fiber to constitute, the distribution of offset address can be that unit is allocated according to the fundamental length of reel length (i.e. fiber lengths), general optical fiber is the allocation offsets address with 2km or 5km for a section generally, stays the information such as optical fiber excess length with the installation site or dish distinguishing the different connector boxs in ODN network. such as, in Fig. 2, central office (CentralOffice, CO) equipment (such as optical line terminal OLT) is 4km to the trunk optical fiber between the beam splitter of 1*N, then at the connector box place at the 2km place of trunk optical fiber, one light marker is installed, 2 light markers so can be installed, if ID5 and ID6 (this mark of meaning not shown in the figures), due to ID5 and ID6 all on trunk optical fiber, belong to same section, according to above-mentioned coding rule, then the sector address of ID5 and ID6 is #00, offset address can be assigned as #00, #01, then the address code of ID5 and ID6 is respectively as follows: #0000 and #0001.
(2) the ODN section for being independently made up of Passive Optical Components, then adopt different offset address to represent the level of its installation, such as beam splitter No.2Stage etc. and the type of device of the beam splitter No.1Stage of ground floor or the second layer, such as branching ratio etc. This situation describes in detail when the structural representation of the another kind of optical distribution network of Fig. 3 for the different situation of the splitting ratio having multistage beam splitter and each beam splitter in optical distribution network, can be described below again.
By above-mentioned form of presentation, address code corresponding respectively for the light marker ID1-ID4 in Fig. 2 is: #0000, #0101, #0202, #0203, the address code that above-mentioned each smooth marker is corresponding uniquely identifies the position of each optical fiber and device in optical distribution network. Additionally, uniqueness from above-mentioned address code, and the rule of addressing is also readily available the topology diagram of now optical distribution network, and obtain Construction State and the running status of each device in optical distribution network accordingly, thus realizing delivery receiving acceptance and fault diagnosis and fix duty function.
The structural representation of another kind of optical distribution network as shown in Figure 3. described optical distribution network includes three beam splitters, and the splitting ratio 1*N of described beam splitter can be the same or different. one-level beam splitter 301 is connected with local side apparatus by trunk optical fiber, one end of secondary light-splitting device 302 and 303 is connected with one-level beam splitter by branch optical fiber, the other end is connected with each optical network unit (OpticalNetworkUnit, ONU) by branch optical fiber. owing to the trunk optical fiber of optical line terminal to one-level beam splitter 301 is at least 6km, one light marker ID is then set at every 2km place, here three light marker: ID301-ID303 it are respectively provided with, one-level beam splitter ID304 arranges light mark ID304, each section of branch optical fiber between one-level beam splitter 301 and secondary light-splitting device 302 and 303 is respectively provided with ID305-ID307, secondary light-splitting device 302 arranges light marker ID308, secondary light-splitting device 303 arranges light marker ID309, and the branch optical fiber between secondary light-splitting device and each optical network unit ONU is respectively provided with light marker ID310-ID313.
According to above-mentioned coding rule, the optical distribution network shown in Fig. 3 being divided into 5 sections, being followed successively by each section dispensing section address is: #00-#04; Made a distinction by offset address under same section, being sequentially allocated offset address is: #00-#09, then in described optical distribution network, the address code scope of each smooth marker ID exists: #0000-#0409, certainly, offset address herein can distribute identical offset address according to sector address difference, illustrates in turn below:
ID301,302 and 303 being a section, its sector address is #00, is followed successively by this ID301-ID303 allocation offsets address #01, #02, #03, and namely the address code of ID301 is #0001, #0002, #0003.
ID304 is on beam splitter 301, belong to another section, this sector address is identified with #01, now can use offset address #00 mark, then now the address code of ID304 is: #0100, can also being identified according to the above-mentioned offset address being sequentially allocated, namely allocation offsets address is #04, then now the address code of ID304 is: #0104.
ID305, ID306 and ID307 belong to another section, this sector address is identified with #02, offset address respectively 00,01,02, now the address of ID505,506,507 is respectively as follows: #0200, #0201, #0202, or be identified according to the above-mentioned offset address being sequentially allocated, then the address code of described ID505,506,507 is respectively as follows: #0205, #0206, #0207.
According to above-mentioned coding rule, light marker ID308 is on secondary light-splitting device 302, and light mark ID309 is on secondary light-splitting device 303, then the address code of described ID308 is: #0300 and #0301; It can also be provided that #0308, #0309; The address code of the light marker ID310-ID313 on each branch optical fiber after described secondary light-splitting device can be: #0400 and #0403, or is #0410 and #0413.
Therefore, the uniqueness of the address code according to above-mentioned smooth identification device, and the rule of addressing is readily available the topology diagram of now optical distribution network, and obtain Construction State and the running status of each device in optical distribution network accordingly, thus realizing delivery receiving acceptance and fault diagnosis and fix duty function, and addressing mode is simply easily achieved.
The detection method of a kind of branch optical fiber that the embodiment of the present invention provides, by being respectively provided with at least one light marker on the trunk optical fiber of described optical distribution network and each branch optical fiber, described trunk optical fiber and branch optical fiber are uniquely identified by described smooth marker by address code, send test optical signal to described optical distribution network after, the optical signal received and each smooth marker in described optical distribution network is returned is analyzed processing, and obtains the address code of described each smooth marker; The address code of each smooth marker according to described acquisition, detect whether optical fiber corresponding to described address code breaks down, solve the problem that after OTDR in prior art cannot accurately detect beam splitter, whether each branch optical fiber breaks down, achieve detection quick, accurate and the fault of location optical distribution network, improve the stability of passive optical network PON system.
The embodiment of the present invention also provides for the failure detector of a kind of optical distribution network, analyzer and at least one light marker is identified including light, described smooth marker is arranged on trunk optical fiber and each branch optical fiber of optical distribution network, described trunk optical fiber and branch optical fiber are uniquely identified by described smooth marker by address code, described light mark analyzer is positioned at local side, wherein
Described light mark analyzer, is used for sending optical signal to described optical distribution network, and wherein said optical signal is the optical signal of test; Receive the optical signal that each smooth marker in described optical distribution network returns, and the optical signal of described return is carried out signal processing, obtain the address code of described each smooth marker; The address code of each smooth marker according to described acquisition, detects whether optical fiber corresponding to described address code breaks down;
Described smooth marker, the optical signal sent for described light identifies analyzer returns to described light mark analyzer.
Further, described smooth marker is arranged on the beam splitter of optical distribution network, and described smooth marker uniquely identifies described beam splitter by address code.
The address code of described smooth marker includes sector address and offset address, wherein said sector address is used for identifying the cross sections of optical distribution network, described offset address is used for identifying trunk optical fiber in same section and branch optical fiber, or described offset address is used for the trunk optical fiber, branch optical fiber and the beam splitter that identify in same section.
The failure detector of a kind of optical distribution network that concrete structure is shown in Figure 4, described failure detector includes: light mark analyzer 406 is connected with 1*N beam splitter 408 by trunk optical fiber, and beam splitter 408 is connected with beam splitter 410 and beam splitter 412 respectively through branch optical fiber. Beam splitter 408 arranges light marker ID401, beam splitter 410 arranges light marker ID402, arranging ID403 on beam splitter 412, and be respectively provided with ID404-ID407 on each branch optical fiber, the splitting ratio of wherein said beam splitter can be the same or different.
Wherein, light mark analyzer 406 may include that circulator 4060, light source 4062, control unit 4064, optical-electrical converter and photoelectric diode (PhotoDiode, PD) 4066, analog-digital converter (AnalogDigitalConverter, ADC) 4068, data signal processing unit 4070 and detection unit 4072, wherein, described light source can be wide spectrum light source (BroadbandLightSource, or tunable light source (TunableLightSource BLS), TLS) by the control of control unit 4064, send the optical signal of predetermined test successively, such as, in a certain wave band (being used for determining unique sector address) some frequencies of light signal, described optical signal is sent to each light marker of optical distribution network by circulator, the light marker that described reflected wavelength range is in this wavelength band can be reflected back the optical signal of this test, after described PD4066 receives the optical signal of the test returned, be converted to digital signal through ADC4068 and record in data signal processing unit, unit 4064 to be controlled controls after TLS or BLS scan through a certain wave band, the digital signal of storage is carried out frequency component extraction by data signal processing unit, as adopted fast Fourier transform (FastFourierTransform, FFT) scheduling algorithm carries out frequency component extraction, the frequency component of extraction is sent to detection unit 4072, the described detection unit 4072 frequency component by described extraction, search the corresponding relation of frequency component and address code, obtain the address code corresponding with described frequency component, the address code of each smooth marker according to described acquisition, detect whether optical fiber corresponding to described address code breaks down. such as, detection unit 4072 has prestored the corresponding relation of frequency component and address code, and now by searching this corresponding relation, the address code obtaining ID401 is #0001, if the address code of the ID401 obtained is not #0001, then judge that the ID401 beam splitter 408 identified breaks down.
It addition, when described light source is BLS, described light mark analyzer also includes variable band-pass filter (TunableBandPassFilter, TBPF) and optical signal is filtered.
Clock signal is adopted to be scanned owing to light identifies the ADC in analyzer, therefore the failure detector of this optical distribution network is also equipped with time division multiplex characteristic, namely the moment that the optical signal of the test of light marker reflection is corresponding can be distinguished, and then the more specific location information of light marker can be accurately known. Finally, according to positional information and status information and the positional information prestored and status information, determine whether whether the optical fiber at described smooth marker place or device break down.
Described smooth marker (ID401-ID405) is reflected for the optical signal that light identifies the test that analyzer sends. Described smooth marker can be based on CFBG (ChirpFiberBraggGrating) string and FP (Fabry-Perot) the type device based on plated film end face, or Etalon, it is also possible to is extrinsic type FP device.
Wherein, when described smooth marker is the FP device based on CFBG string, described CFBG string is used for constituting Intrinsical FP chamber. FSR (FreeSpectrumRange) according to FP fixes at the material of resonator cavity, when namely refractive index is fixing, only relevant with the length of resonator cavity (under the premise not causing ambiguity, hereinafter referred to as chamber length), namely grows up to inverse ratio with chamber. Therefore, in the present embodiment, by the improvement to traditional CFBG processing technology, secret plant equipment is adopted accurately to control chamber long so that it is the distance controllable precise of two CFBG between CFBG string, namely chamber length is controlled, thus constituting the light ID device of different address code. In the present embodiment, chamber length be spaced apart 100um ± 10um, then when chamber length changes at 11000um to 17400um, it is possible to constitute 64 addresses light ID device. Long interval, chamber could be arranged to be set to any number according to technique, and the intrinsic FP that therefore arbitrarily the CFBG string at long interval, chamber is constituted belongs to the invention scope of this patent as light ID device.
When described smooth marker is Intrinsical FP, it is possible to replace with the extrinsic type FP device adopting plated film end face to constitute according to actual needs, now adopts the plated film end face of predefined reflectivity to replace the CFBG in CFBG string, test optical signal is reflected. Adopt extrinsic type FP, owing to passing through the precision ground controlling to constitute the medium of resonator cavity, therefore can obtain more end moral light ID device. Additionally, the Intrinsical FP device of described CFBG serial type can also be substituted by other kinds of Intrinsical FP device. Due to the present invention it is emphasised that adopt the FSR in FP chamber as address, therefore adopt any type of FP device, obtain different FSR by accurately controlling chamber length, and using the FSR that obtains as unique address code, belong to protection scope of the present invention.
The failure detector of a kind of optical distribution network that the embodiment of the present invention provides, identifies analyzer by light and sends the optical signal of test to described optical distribution network; Receive the optical signal that each smooth marker in described optical distribution network returns, and the optical signal of described return is carried out signal processing, obtain the address code of described each smooth marker; The address code of each smooth marker according to described acquisition, detect whether optical fiber corresponding to described address code breaks down, solve the problem that after OTDR in prior art cannot accurately detect beam splitter, whether each branch optical fiber breaks down, achieve detection quick, accurate and the fault of location optical distribution network, improve the stability of passive optical network PON system.
The embodiment of the present invention additionally provides an optical network system, described optical network system includes: optical line terminal, optical distribution network, and optical network unit, described optical line terminal is connected with described optical network unit by optical distribution network, described optical distribution network includes trunk optical fiber, branch optical fiber and beam splitter, it is characterized in that, described optical network system also includes: light mark analyzer and at least one light marker, described smooth marker is arranged on trunk optical fiber and each branch optical fiber of optical distribution network, described trunk optical fiber and branch optical fiber are uniquely identified by described smooth marker by address code, described light mark analyzer is positioned at local side, wherein,
Concrete structure is referred to shown in Fig. 5, described optical network system includes: fibre-optic terminus (OpticalLineTerminal, OLT) 502 and light mark analyzer 506 by wavelength division multiplexer (WavelengthDivisionMultiplexer, WDM) 504 are connected with 1*8 beam splitter 508, wherein it is connected by trunk optical fiber between OLT502 with beam splitter 508, beam splitter 508 is respectively through beam splitter 510 and beam splitter 512 and multiple optical network unit (OpticalNetworkUnit, ONU) 514 are connected, described beam splitter 512 is connected with ONU514 respectively through branch optical fiber with beam splitter 514.
Described light mark analyzer 506, is used for sending optical signal to described optical distribution network, and wherein said optical signal is the optical signal of test; Receive the optical signal that each smooth marker in described optical distribution network returns, and the optical signal of described return is carried out signal processing, obtain the address code of described each smooth marker; The address code of each smooth marker according to described acquisition, detects whether optical fiber corresponding to described address code breaks down. The structure of concrete light mark analyzer 506 refers to the description of the embodiment of Fig. 4 and correspondence.
Described smooth marker (ID501-ID505), the optical signal sent for described light identifies analyzer returns to described light mark analyzer.
Described smooth marker is arranged on the beam splitter of optical distribution network, and described smooth marker uniquely identifies described beam splitter by address code. The address code of described smooth marker includes sector address and offset address, wherein said sector address is used for identifying the cross sections of optical distribution network, described offset address is used for identifying trunk optical fiber in same section and branch optical fiber, or described offset address is used for the trunk optical fiber, branch optical fiber and the beam splitter that identify in same section.
A kind of optical network system provided by the invention, by being respectively provided with at least one light marker on the trunk optical fiber of described optical distribution network and each branch optical fiber, described trunk optical fiber and branch optical fiber are uniquely identified by described smooth marker by address code, send test optical signal to described optical distribution network after, the optical signal received and each smooth marker in described optical distribution network is returned is analyzed processing, and obtains the address code of described each smooth marker; The address code of each smooth marker according to described acquisition, detect whether optical fiber corresponding to described address code breaks down, solve the problem that after OTDR in prior art cannot accurately detect beam splitter, whether each branch optical fiber breaks down, achieve detection quick, accurate and the fault of location optical distribution network, improve the stability of passive optical network PON system.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (6)
1. the fault detection method of an optical distribution network, it is characterized in that, being respectively provided with at least one light marker on the trunk optical fiber and each branch optical fiber of described optical distribution network, described trunk optical fiber and branch optical fiber are uniquely identified by described smooth marker by address code, and described method includes:
Sending optical signal to described optical distribution network, wherein said optical signal is the optical signal of test;
Receive the optical signal that each smooth marker in described optical distribution network returns, and the optical signal of described return is carried out signal processing, obtain the address code of described each smooth marker;
The address code of each smooth marker according to described acquisition, detects whether optical fiber corresponding to described address code breaks down and obtain the topological structure of described optical distribution network;
The address code of described smooth marker includes sector address and offset address, and wherein said sector address is used for identifying the cross sections of optical distribution network, and described offset address is used for the trunk optical fiber, branch optical fiber and the beam splitter that identify in same section;
Wherein, described method also includes: arranging at least one light marker at least one beam splitter of described optical distribution network, described beam splitter is uniquely identified by described smooth marker by address code.
2. fault detection method according to claim 1, it is characterised in that the described optical signal to described return is analyzed processing, and the address code obtaining described each smooth marker includes:
By optical-electrical converter to, the optical signal of described return is converted the signal of telecommunication of correspondence;
By analog-digital converter, the signal of telecommunication after conversion is converted to the digital signal of correspondence, and the digital signal after converting is carried out frequency component extraction;
By the frequency component of described extraction, search the corresponding relation of frequency component and address code, obtain the address code corresponding with described frequency component.
3. the failure detector of an optical distribution network, it is characterized in that, analyzer and at least one light marker is identified including light, described smooth marker is arranged on trunk optical fiber and each branch optical fiber of optical distribution network, described trunk optical fiber and branch optical fiber are uniquely identified by described smooth marker by address code, described light mark analyzer is positioned at local side, wherein
Described light mark analyzer, is used for sending optical signal to described optical distribution network, and wherein said optical signal is the optical signal of test; Receive the optical signal that each smooth marker in described optical distribution network returns, and the optical signal of described return is carried out signal processing, obtain the address code of described each smooth marker; The address code of each smooth marker according to described acquisition, detects whether optical fiber corresponding to described address code breaks down and obtain the topological structure of described optical distribution network;
Described smooth marker, the optical signal sent for described light identifies analyzer returns to described light mark analyzer, the address code of described smooth marker includes sector address and offset address, wherein said sector address is used for identifying the cross sections of optical distribution network, described offset address is used for identifying trunk optical fiber in same section and branch optical fiber, or described offset address is used for the trunk optical fiber, branch optical fiber and the beam splitter that identify in same section;
Described smooth marker is arranged on the beam splitter of optical distribution network, and described smooth marker uniquely identifies described beam splitter by address code.
4. failure detector according to claim 3, it is characterised in that described light mark analyzer includes:
Tunable light source or wide spectrum light source, be used for sending optical signal to described optical distribution network;
Optical-electrical converter, for receiving the optical signal that each smooth marker in described optical distribution network returns, converts the signal of telecommunication of correspondence to by the optical signal of described return;
Analog-digital converter, converts the digital signal of correspondence to by the signal of telecommunication after conversion;
Signal processing unit, for carrying out frequency component extraction to the digital signal after converting;
Detection unit, for the frequency component by described extraction, search the corresponding relation of frequency component and address code, obtain the address code corresponding with described frequency component, the address code of each smooth marker according to described acquisition, detects whether optical fiber corresponding to described address code breaks down.
5. an optical network system, described optical network system includes optical line terminal, optical distribution network, and optical network unit, described optical line terminal is connected with described optical network unit by optical distribution network, described optical distribution network includes trunk optical fiber, branch optical fiber and beam splitter, it is characterized in that, described optical network system also includes: light mark analyzer and at least one light marker, described smooth marker is arranged on trunk optical fiber and each branch optical fiber of optical distribution network, described trunk optical fiber and branch optical fiber are uniquely identified by described smooth marker by address code, described light mark analyzer is positioned at local side, wherein,
Described light mark analyzer, is used for sending optical signal to described optical distribution network, and wherein said optical signal is the optical signal of test; Receive the optical signal that each smooth marker in described optical distribution network returns, and the optical signal of described return is carried out signal processing, obtain the address code of described each smooth marker; The address code of each smooth marker according to described acquisition, detects whether optical fiber corresponding to described address code breaks down and obtain the topological structure of described optical distribution network;
Described smooth marker, the optical signal sent for described light identifies analyzer returns to described light mark analyzer, the address code of described smooth marker includes sector address and offset address, wherein said sector address is used for identifying the cross sections of optical distribution network, described offset address is used for identifying trunk optical fiber in same section and branch optical fiber, or described offset address is used for the trunk optical fiber, branch optical fiber and the beam splitter that identify in same section;
Described smooth marker is arranged on the beam splitter of optical distribution network, and described smooth marker uniquely identifies described beam splitter by address code.
6. optical network system according to claim 5, it is characterized in that the optical signal of the test that described light mark analyzer sends passes through wavelength division multiplexer, the optical signal sent with described optical line terminal converges, and the optical signal after described convergence is sent to described optical distribution network.
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| PCT/CN2011/084759 WO2013097097A1 (en) | 2011-12-27 | 2011-12-27 | Method, apparatus and optical network system for detecting fault in optical distribution network |
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| TWI502906B (en) * | 2012-11-01 | 2015-10-01 | Univ Nat Taiwan Science Tech | Active network monitoring system and controlling method thereof |
| CN104426603A (en) | 2013-08-30 | 2015-03-18 | 华为技术有限公司 | Optical network detection method, optical network detection device, optical network detection equipment, optical network detection system and optical splitter |
| CN104518825B (en) * | 2013-09-26 | 2018-10-09 | 上海诺基亚贝尔股份有限公司 | The intelligent splitter element that a kind of branch optical fiber for PON monitors |
| CN104796189B (en) * | 2014-01-21 | 2018-08-10 | 南京中兴新软件有限责任公司 | Optical splitter construction method and management terminal |
| CN103997370B (en) * | 2014-05-22 | 2017-12-29 | 烽火通信科技股份有限公司 | The mark and detection method and device of a kind of optical signal |
| TWI549441B (en) * | 2014-08-06 | 2016-09-11 | Chunghwa Telecom Co Ltd | Using Optical Fiber Home to Service Network Management Information Quickly Diagnose Methods of Optical Distribution Network Barriers |
| CN105792029B (en) * | 2014-12-24 | 2020-08-04 | 南京中兴软件有限责任公司 | Intelligent ODN (optical distribution network) identification system and device |
| CN110474678B (en) * | 2019-08-22 | 2021-06-01 | 华为技术有限公司 | Method and system for acquiring optical fiber code and related equipment |
| WO2024113235A1 (en) * | 2022-11-30 | 2024-06-06 | 华为技术有限公司 | Signal processing method and related device |
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| US6396575B1 (en) * | 2000-05-31 | 2002-05-28 | Lucent Technologies Inc. | Test and measurement system for detecting and monitoring faults and losses in passive optical networks (PONs) |
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