CN101567724A - Network situation detection system and method - Google Patents
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- CN101567724A CN101567724A CNA2009101076153A CN200910107615A CN101567724A CN 101567724 A CN101567724 A CN 101567724A CN A2009101076153 A CNA2009101076153 A CN A2009101076153A CN 200910107615 A CN200910107615 A CN 200910107615A CN 101567724 A CN101567724 A CN 101567724A
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Abstract
The invention embodiment discloses a network situation detection system. The network situation detection system includes a detection signal generating module, which is used for producing detection signal, and broadcasting the detection signal to the multi network units by the branching unit, receiving the reflected signal produced by the detection signal in the network line, and detecting the power value sequence of the reflected signal of the detection signal, wherein the detection signal includes a reference test signal and a first test signal; a waveform analysis module which is used for obtaining the power value sequence of the reflected signal of the first branch circuit link, according to reference power value sequence of the reflected signal of the reference test signal as well as the first power value sequence of the reflected signal of the first test signal; as well as a filter, which is used for filtering signal through the first branch circuit link. The network situation detection system disclosed by the invention embodiment can obtain the power value sequence of the reflected signal of the branch circuit link, and detect the situation of the network circuit.
Description
Technical field
The present invention relates to network technology, especially a kind of network situation detection system and method.
Background technology
Along with society and expanding economy, slowly the trend that will become network application that Fiber to the home, corresponding passive optical network (Passive Optical Network is called for short PON) technology will slowly enter huge numbers of families.Further, be equipped with the PON of optical branching device can realize that a little to the transfer of data of multiple spot, this exactly structure has been saved a large amount of optical cable inputs, has reduced the cost of Virtual network operator, has been subjected to the favor of most of operator.But because optical fiber has flimsy characteristics, locate the line fault among the PON how in time, exactly, also perplexing Virtual network operator always.
In general, the detection for the line fault in the fiber optic network all is to be undertaken by optical time domain reflectometer (optical time domain reflectormeter is called for short OTDR).Concrete, OTDR launches light pulse signal from an end of tested optical fiber to optical fiber, because the communication process of light in optical fiber can produce rayleigh backscattering and Fresnel reflection, these scattered lights and reverberation can turn back to the OTDR test lead along optical fiber.OTDR draws out the trajectory diagram that is used for reacting optical fiber quality according to the size and the time of the light that returns.The user can judge the quality of diverse location optical fiber according to trajectory diagram.Utilize common OTDR can accurately locate the fault of simple optical fiber in the point-to-point topology, but for the structure of this point of PON to multiple spot, because the link failure after the optical branching device can be superimposed, therefore can't distinguish fault appears at which, also can't be certain draw location of fault.
To sum up, be necessary to provide fault detect and the localization method of a kind of PON, to realize fault detect and location to the fiber optic network of putting multiple spot.
Summary of the invention
The embodiment of the invention discloses a kind of network situation detection system.Described network situation detection system comprises detection signal generation module, waveform analysis module and filter.Wherein, described filter is used for the signal by described first branch circuit link is carried out filtering; Described detection signal generation module is used to produce detection signal, broadcast described detection signal by described splitter to described a plurality of network element, receive the reflected signal that described detection signal produces in network line, and detecting the power value sequence of the reflected signal of described detection signal, described detection signal comprises with reference to the test signal and first test signal; Described waveform analysis module, be used for first power value sequence according to the reflected signal of the reference power value sequence of described reflected signal with reference to test signal and described first test signal, obtain described first branch circuit link reflected signal power value sequence wherein.
The embodiment of the invention also discloses a kind of network condition detection method.Described network condition detection method comprises generation with reference to test signal, and broadcasts to described a plurality of network element with reference to test signal described by described splitter; Receive described reflected signal, and write down the reference power value sequence of described reflected signal with reference to test signal with reference to test signal; Produce first test signal, and described first test signal is broadcasted to described a plurality of network element, and the wavelength of described first test signal is included in the filter wavelength of being located at the filter on described first branch circuit link by described splitter; Receive the reflected signal of described first test signal, and write down first power value sequence of the reflected signal of described first test signal; Obtain the power value sequence of the reflected signal of described first branch circuit link according to described reference power value sequence and described first power value sequence.
The embodiment of the invention also provides a kind of network system.Described network system comprises the network terminal, the splitter that communicates to connect with the described network terminal, and a plurality of network element that communicate to connect by many branch circuit link and described splitter, comprise first network element in described a plurality of network element, described first network element communicates to connect by first branch circuit link and described splitter, it is characterized in that, described network system also comprises network situation detection system, and described network situation detection system comprises detection signal generation module, waveform analysis module and filter.Wherein, described filter is used for the signal by described first branch circuit link is carried out filtering; Described detection signal generation module is used to produce detection signal, broadcast described detection signal by described splitter to described a plurality of network element, receive the reflected signal that described detection signal produces in network line, and detecting the power value sequence of the reflected signal of described detection signal, described detection signal comprises with reference to the test signal and first test signal; Described waveform analysis module, be used for first power value sequence according to the reflected signal of the reference power value sequence of described reflected signal with reference to test signal and described first test signal, obtain the power value sequence of the reflected signal of described first branch circuit link, with the foundation that detects as the network condition of described first branch circuit link, wherein, the filter wavelength of described filter comprises the wavelength of described first test signal.
Disclosed network condition detection method and system in the embodiment of the invention, send the test signal of different wave length by detection signal generation module, and filter by the test signal of filter with branch circuit link to be tested, can calculate the performance number of the reflected signal of branch circuit link to be tested by the power value of looking between the reflected signal, with the foundation that detects as network condition.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic diagram of the network situation detection system that the embodiment of the invention provided;
Fig. 2 is the schematic diagram according to the waveform trace 0 of the power loss drafting of the reflected signal of the reference test signal in the embodiment of the invention;
Fig. 3 is the schematic diagram according to the waveform trace 1 of the power loss drafting of the reflected signal of first test signal in the embodiment of the invention;
Fig. 4 is the schematic diagram of waveform trace of drafting first branch circuit link of the embodiment of the invention;
Fig. 5 is the schematic diagram of the waveform analysis module that the embodiment of the invention provided;
Fig. 6 is the schematic diagram of the network condition detection method of the embodiment of the invention;
Fig. 7 is the automatic matching method of the output port of network element that the embodiment of the invention provided and splitter.
Fig. 8 is the automatic matching method of the output port of network element that further embodiment of this invention provided and splitter.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Please refer to Fig. 1, Figure 1 shows that the schematic diagram of the network situation detection system that the embodiment of the invention provides.The described network situation detection system of the embodiment of the invention is used for a little to the network system of multiple spot, described point to the network system of multiple spot comprise Network Termination #1 0, the splitter 30 that communicates to connect with the described network terminal and a plurality of network element 50 that communicate to connect by branch circuit link and described splitter 30.The network situation detection system that the embodiment of the invention provided comprises detection signal generation module 20, waveform analysis module 40 and a plurality of filter 60.
Described detection signal generation module 20 is used to produce multi-wavelength's detection signal, by network line detection signal is sent to splitter 30, and the performance number of the reflected signal of the described detection signal that returns in the computing network circuit, as alternate embodiments, module 20 takes place well described detection performance also can be according to the performance number drawing waveforms track of described reflected signal.In embodiments of the present invention, described point also comprises coupler 22 to the network system of multiple spot.Described coupler 22 joins with network line, be used for the detection signal that detection signal generation module 20 produces is coupled to network line, wherein, in embodiments of the present invention, described coupler 22 can be wavelength division multiplexer (Wavelength Division Multiplexer is called for short WDM).In other alternate embodiments, described coupler 22 can also adopt the splitter of 1:2, so that detection signal is coupled to the service signal that Network Termination #1 0 sends.In embodiments of the present invention, the wavelength of described test signal comprises λ 0, λ 1, λ 2... λ n (n is a natural number), and wherein said λ 0 is the reference test wavelength with reference to test signal.Certainly, if do not consider detection signal is sent with common service signal, also coupler can be set.
In embodiments of the present invention, described Network Termination #1 0 is Optical Network Terminal (Optical Line Terminal is called for short OLT), and described network element 50 can be optical network unit (Optical Network Unit is called for short ONU).Accordingly, the networking circuit described in the embodiment of the invention is a fibre circuit.In other alternate embodiments, described Network Termination #1 0 also can be the terminal that other can be used for broadcast singal.
In embodiments of the present invention, described splitter 30 is an optical branching device, and in other alternate embodiments, described splitter 30 also can be other device or the equipment that can be used for signal multipath broadcast transmitted.
In embodiments of the present invention, described detection signal generation module 20 can be optical time domain reflectometer (optical time domain reflectormeter, be called for short OTDR), in other alternate embodiments, described detection signal generation module 20 also can be the instrument that other can produce signal and receive reflected signal.In embodiments of the present invention, described detection signal generation module 20 was in two device entity with the waveform analysis module in 40 minutes, under the situation of needs, also described detection signal generation module 20 can be integrated with waveform analysis module 40.
Further, in other alternate embodiments, described detection signal generation module 20 also can be to be located in the described Network Termination #1 0, thereby when detection signal generation module 20 produces detection signal, by Network Termination #1 0 described detection signal is converted into service signal and sends.
Described waveform analysis module 40 is used for calculating according to the performance number of the reflected signal of described detection signal the waveform trace of the line conditions that obtains the expression branch circuit link
Described a plurality of filter 60 is located at respectively on described many branch circuit link, be used to stop the signal of respective wavelength on the branch circuit link that described a plurality of output port connect, to propagate, concrete, described a plurality of filters 60 can be installed on the network line between described splitter 30 and the network element 50, can be installed in the described splitter 30 and corresponding with a plurality of output ports of described splitter 30 respectively, also can be installed in a side of network element 50.Described a plurality of filter 60 pairing a plurality of wavelength comprise Γ 1, Γ 2... Γ n (n is a natural number), wherein, and λ n=Γ n.
As optional embodiment, the network situation detection system that the embodiment of the invention provided can also comprise Surveillance center 80, is used for the test job of control detection signal generating module 20; The result that receiving locus is analyzed and handled; Network terminal command signal is accepted in communication between the maintenance and the network terminal; The final situation of fault location and the result that the optical splitter port mates automatically of showing provides human-computer interaction interface and external interface.
In actual applications, at first, detection signal generation module 20 is sent the reference test signal 0 that wavelength is λ 0, describedly be transparent for described a plurality of filters 60 with reference to test signal 0, that is to say, describedly can pass through described a plurality of filters 60, and reach network element 50 with reference to test signal 0.Detection signal generation module 20 receives described reflected signal with reference to test signal each point in network line, and obtains the reference power value sequence of the reflected signal of described each point.In embodiments of the present invention, for the ease of observing, described detection signal generation module 20 can be according to the performance number drawing waveforms track of described reflected signal, concrete, consider the usage of trade, detection signal generation module 20 is converted to the power loss value with performance number earlier, the concrete formula that please refer to:
This formula has reflected that the power of signal becomes the power loss dB that P1 produces from P0, and wherein, P1 is the performance number of reflected signal, is the value in the reference power value sequence here; P0 is a reference value, in embodiments of the present invention, owing to only need to understand the relative value of variable power, therefore can set arbitrarily as required in advance; 1L is the power loss value, and unit is dB.Certainly, understandablely be, because P0 is the value that sets in advance, so the power loss that obtains here is a relative value.
Please refer to Fig. 2, Fig. 2 is the schematic diagram according to the waveform trace 0 of the power loss drafting of the reflected signal of reference test signal, it has reflected the trunk link between Network Termination #1 0 and the splitter 30, and the power loss situation after the stack of the reflected signal of all branch circuit link after the splitter, wherein the transverse axis of waveform trace 0 has been represented the distance of network line distance detecting signal generating module 20, the longitudinal axis is then represented the power loss of the reflected signal that the concrete point in the network line is produced, and the power loss value here all is the relative value with respect to " P0 " certainly.
In second step, detection signal generation module 20 is then sent first test signal that wavelength is λ 1, and described first test signal network element to each branch circuit link after reaching splitter 30 and demultiplexing is propagated.Because corresponding wavelength is the filter 1 of Γ 1 first test signal on its first branch circuit link 1 of living in is stopped, receive the reflected signal of described first test signal thereby work as detection signal generation module 20, and write down first power value sequence of the reflected signal of described first test signal.Certainly, in embodiments of the present invention, described detection signal generation module 20 also can be according to first power value sequence of the reflected signal of described first test signal and " P0 " that sets in advance, obtain first waveform trace 1, described first waveform trace 1 is the trunk link, and the stack result of reflected signal that does not comprise other branch circuit link of first branch circuit link.Please refer to Fig. 3, Fig. 3 is the schematic diagram according to the waveform trace 1 of the power loss drafting of the reflected signal of first test signal in the embodiment of the invention.
The 3rd step, described waveform analysis module 40 is according to the described reference power value sequence and first power value sequence, calculate the waveform trace of the power loss of first branch circuit link 1, thereby operating personnel can confirm the line conditions of first branch circuit link 1 according to first waveform trace of described first branch circuit link.Certainly, if the module of detection signal generation before 20 has just been exported the reference waveform track and first waveform trace, then need according to formula here
Convert the reference waveform track and first waveform trace to reference power value sequence and first power value sequence.
Concrete, waveform analysis module 40 is subtracted each other the reference power loss value sequence and the first power loss value sequence, because being reference signal, reference power loss value sequence changes at the reflected signal of trunk link and the stack of all branch circuit link, and first power sequence to be the reflected signal of trunk link and other all branch circuit link stack of removing first branch circuit link change into, therefore the sequence of the reference power sequence and first power is subtracted each other, can obtain the power value sequence of first branch circuit link.Waveform analysis module then 40 calculates the power loss of each point on first branch circuit link again according to the power value sequence and the reference power value " P0 " of described first branch circuit link, and the drawing waveforms track.Please refer to Fig. 4, Figure 4 shows that the schematic diagram of waveform trace of drafting first branch circuit link of the embodiment of the invention.
Understandablely be, only need to send the test signal of different wave length, and repeat second step and the 3rd and go on foot the waveform trace can obtain with the corresponding branch circuit link of wavelength of test signal, and operating personnel or computer system can be judged the line status of corresponding branch circuit link by described waveform trace.
The network situation detection system that the embodiment of the invention provided sends the test signal of different wave length by detection signal generation module, can obtain the power value sequence of corresponding filter branch circuit link of living in, and according to the fluctuation situation of the performance number of branch circuit link, can realize the situation of network line is detected and fault location, perhaps for point more directly perceived, according to the power value sequence drawing waveforms track of described branch circuit link, can determine the situation of branch circuit link more intuitively according to the fluctuation situation of waveform trace.Such as Fig. 4, occurred place fluctuation in the waveform trace according to the reflected signal that can see branch circuit link in the single channel trajectory diagram wherein, thereby can judge that there is the networking problem in this residing position of fluctuating.
Please refer to Fig. 5, Figure 5 shows that the schematic diagram of the waveform analysis module 40 that the embodiment of the invention provides.Described waveform analysis module 40 comprises conversion module 42 and computing module 44.Described conversion module 42 is used for the waveform trace that detection signal generation module 20 generates is converted to power value sequence, and power value sequence is scaled waveform trace.Reference power value sequence after the waveform trace that described computing module 44 is used to receive reference signal converts; and the measured power value sequence of the waveform trace of the reflected signal of test signal after converting, and calculate the branch circuit link power value sequence according to described reference power value sequence and measured power value sequence.
The waveform analysis of the described waveform analysis module 40 of the embodiment of the invention mainly comprises following several steps:
Step 501: computing module 44 calculates the first branch circuit link power value sequence according to the described reference power value sequence and first power value sequence;
Concrete, computing module 44 subtracts each other the reference power value sequence and first power value sequence, because the reference power value sequence is the reflected signal stack of reference signal in trunk link and all branch circuit link, and first power value sequence is being superimposed as of the folded reflected signal of trunk link and other all branch circuit link of removing first branch circuit link, therefore the reference power value sequence and first power value sequence are subtracted each other, can obtain the power value sequence of the reflected signal of first branch circuit link.
Step 503: conversion module 42 is converted into the power value sequence of the reflected signal of described first branch circuit link waveform trace of first branch circuit link.
Understandable is that if detection signal generation module 20 has just been exported the reference waveform track and first waveform trace, the module that then converts 42 converts the described reference waveform track and first waveform trace to reference power value sequence and first power value sequence earlier.
Understandablely being, is that example describes though the present invention is a EPON with point-to-multipoint, and network situation detection system provided by the present invention also can be applied in other the network system of point-to-multipoint.
Please refer to Fig. 6, Figure 6 shows that the schematic diagram of the network condition detection method of the embodiment of the invention.Described network condition detection method is used for the network system of multiple branch circuit link, described network system comprises a network terminal, a splitter and a plurality of network element, described network condition detection method can be used for detecting the line conditions of many branch circuit link between splitter and the described a plurality of network element, and the network condition detection method that the embodiment of the invention provided comprises:
Step 601: produce with reference to test signal, and propagate into network line with reference to test signal with described;
Wherein, described network line comprises the basic routing line between the network terminal and the splitter, and the branch circuit link between splitter and a plurality of network element.
Step 602: receive described reflected signal, and write down the power of described reflected signal with reference to test signal, as the reference power value sequence with reference to test signal each point in described network line;
Step 603: produce and corresponding first test signal of first branch circuit link, and described first test signal is propagated to all branch circuit link;
Wherein, be provided with first filter in described first branch circuit link, the wavelength of described first test signal is corresponding with described first filter, that is to say, described first test signal can't be passed through described first filter.
Step 604: receive the each point reflected signal in described network line of described first test signal, and write down the performance number of the reflected signal of described first test signal, as first power value sequence;
Step 605:, obtain the power value sequence of the reflected signal of first branch circuit link according to the described reference power value sequence and first power value sequence;
Step 606: the network condition of judging described first branch circuit link according to the power value sequence of the reflected signal of described first branch circuit link.
Certainly, directly perceived for the ease of being convenient to judgement, the network condition detection method that the embodiment of the invention provided, described step 606 can also comprise:
Step 606a: the power value sequence of the reflected signal of described first branch circuit link is converted into waveform trace, with foundation as the network condition of judging described first branch circuit link.Wherein, in embodiments of the present invention, the waveform trace of the power loss that described waveform trace can calculate for the performance number according to described reflected signal in other alternate embodiments, also can directly come the drawing waveforms track according to described power value sequence.
The network condition detection method that the embodiment of the invention provided is calculated the power loss of branch circuit link to be tested from the reflected signal of reference test signal by the method for filter shielding test signal, is used for the foundation of identification circuit situation.
Further, because the business of PON is a broadcast type, promptly the business that issues of each port of splitter is the same substantially.So though network element has the ID of oneself, generally, the network terminal can't know that network element is which output port that is linked into splitter.The user at will arrives different branch roads in the mobile network unit like this, and the network terminal also can't be found.And adopt the network situation detection system that the embodiment of the invention provided also to can be used for realizing that the output port of network element and splitter mates automatically.Please refer to Fig. 7, the automatic matching method of the network element that the embodiment of the invention provided and the output port of splitter comprises:
Step 701: send test massage to a plurality of network element by splitter, the filter wavelength of the pairing filter of output port of the wavelength of described test signal and splitter to be matched is corresponding;
Step 702: the feedback signal that receives described a plurality of network element;
Step 703: the feedback signal according to described a plurality of network element judges, with the corresponding network element of output port of described splitter to be matched.
The automatic matching method of the embodiment of the invention is by detecting the coupling that feedback signal realizes the output port of network element and splitter, and is simple to operate and the result is accurate.
Please refer to Fig. 8, Figure 8 shows that the automatic matching method that further embodiment of this invention provides.The described automatic matching method of the embodiment of the invention comprises:
Step 801: the network terminal sends the instruction of preparing to accept checking by splitter to a plurality of network element;
Step 802 sends test massage to a plurality of network element by splitter, and wherein, the filter wavelength of the pairing filter of output port of the wavelength of described test signal and splitter to be matched is corresponding;
Step 803: the network terminal receives the feedback signal of network element, and determines and the corresponding network element of output port of described splitter to be matched wherein, described feedback signal is used to illustrate whether described a plurality of network element receives test signal.
The automatic matching method of the embodiment of the invention is by detecting the coupling that feedback signal realizes the output port of network element and splitter, and is simple to operate and the result is accurate.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (14)
1, a kind of network situation detection system, the network system that is used for point-to-multipoint, described network system comprises splitter, and, comprising first network element in described a plurality of network element by a plurality of network element that many branch circuit link and described splitter communicate to connect, described first network element communicates to connect by first branch circuit link and described splitter, it is characterized in that, described network situation detection system comprises detection signal generation module, waveform analysis module and filter, wherein
Described filter is used for the signal by described first branch circuit link is carried out filtering;
Described detection signal generation module is used to produce detection signal, broadcast described detection signal by described splitter to described a plurality of network element, receive the reflected signal that described detection signal produces in network line, and detecting the power value sequence of the reflected signal of described detection signal, described detection signal comprises with reference to the test signal and first test signal;
Described waveform analysis module, be used for first power value sequence according to the reflected signal of the reference power value sequence of described reflected signal with reference to test signal and described first test signal, obtain the power value sequence of the reflected signal of described first branch circuit link, with the foundation that detects as the network condition of described first branch circuit link
Wherein, the filter wavelength of described filter comprises the wavelength of described first test signal.
2, network situation detection system as claimed in claim 1 is characterized in that, described detection signal generation module also comprises coupler, is used for being coupled to network line with described with reference to test signal and described first test signal.
3, network situation detection system as claimed in claim 1, it is characterized in that, described waveform analysis module comprises: computing module, be used for described reference power value sequence and described first power value sequence are subtracted each other, and obtain the power value sequence of the reflected signal of described first branch circuit link.
4, network situation detection system as claimed in claim 1 is characterized in that, described waveform analysis module also comprises computing module, is used for generating waveform trace according to power value sequence.
5, network situation detection system as claimed in claim 4, it is characterized in that, described computing module generates the waveform trace of the reflected signal of first branch circuit link according to the power value sequence of the reflected signal of described first branch circuit link, and the waveform trace of the reflected signal of described first branch circuit link is used to describe the power loss of the reflected signal of described first branch circuit link.
6, a kind of network condition detection method, the network system that is used for the multiple branch circuit link, described network system comprises a network terminal, a splitter and a plurality of network element that communicate to connect by many branch circuit link and described splitter, described a plurality of network element comprises first network element that communicates to connect by first branch circuit link and described splitter, described network system also comprises filter, be used for the signal by described first branch circuit link is carried out filtering, described it is characterized in that, described network condition detection method comprises:
Generation is broadcasted to described a plurality of network element with reference to test signal described with reference to test signal;
Receive described reflected signal, and write down the reference power value sequence of described reflected signal with reference to test signal with reference to test signal;
Produce first test signal, and described first test signal is broadcasted to described a plurality of network element, and the wavelength of described first test signal is included in the filter wavelength of described filter by described splitter;
Receive the reflected signal of described first test signal, and write down first power value sequence of the reflected signal of described first test signal;
Obtain the power value sequence of the reflected signal of described first branch circuit link according to described reference power value sequence and described first power value sequence;
Judge the network condition of described first branch circuit link according to described power value sequence.
7, network condition detection method as claimed in claim 6 is characterized in that, described step judges that according to described power value sequence the network condition of described first branch circuit link also comprises:
The power value sequence of the reflected signal of described first branch circuit link is converted into waveform trace, judges the network condition of described first branch circuit link according to described waveform trace.
8, network condition detection method as claimed in claim 6 is characterized in that, described step judges that according to described power value sequence the network condition of described first branch circuit link also comprises:
The power value sequence of the reflected signal of described first branch circuit link is converted into the waveform trace of the power loss of the reflected signal that has reflected first branch circuit link.
9, network condition detection method as claimed in claim 6 is characterized in that, the described power value sequence that obtains the reflected signal of described first branch circuit link according to described reference power value sequence and described first power value sequence comprises:
Described reference power value sequence and described first power value sequence are subtracted each other, with the power value sequence of the reflected signal that obtains described first branch circuit link.
10, a kind of network system, comprise the network terminal, the splitter that communicates to connect with the described network terminal, and a plurality of network element that communicate to connect by many branch circuit link and described splitter, comprise first network element in described a plurality of network element, described first network element communicates to connect by first branch circuit link and described splitter, it is characterized in that, described network system also comprises network situation detection system, described network situation detection system comprises detection signal generation module, the waveform analysis module, and filter, wherein
Described filter is used for the signal by described first branch circuit link is carried out filtering;
Described detection signal generation module is used to produce detection signal, broadcast described detection signal by described splitter to described a plurality of network element, receive the reflected signal that described detection signal produces in network line, and detecting the power value sequence of the reflected signal of described detection signal, described detection signal comprises with reference to the test signal and first test signal;
Described waveform analysis module, be used for first power value sequence according to the reflected signal of the reference power value sequence of described reflected signal with reference to test signal and described first test signal, obtain the power value sequence of the reflected signal of described first branch circuit link, with the foundation that detects as the network condition of described first branch circuit link
Wherein, the filter wavelength of described filter comprises the wavelength of described first test signal.
11, network situation detection system as claimed in claim 10 is characterized in that, described detection signal generation module also comprises coupler, is used for being coupled to network line with described with reference to test signal and described first test signal.
12, network situation detection system as claimed in claim 10, it is characterized in that, described waveform analysis module comprises: computing module, be used for described reference power value sequence and described first power value sequence are subtracted each other, and obtain the power value sequence of the reflected signal of described first branch circuit link.
13, network situation detection system as claimed in claim 10 is characterized in that, described waveform analysis module also comprises computing module, is used for generating waveform trace according to power value sequence.
14, network situation detection system as claimed in claim 13, it is characterized in that, described computing module generates the waveform trace of the reflected signal of first branch circuit link according to the power value sequence of the reflected signal of described first branch circuit link, and the waveform trace of the reflected signal of described first branch circuit link is used to describe the power loss of the reflected signal of described first branch circuit link.
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| CN102118658A (en) * | 2009-12-31 | 2011-07-06 | 华为技术有限公司 | Method and device for port identification of light splitter |
| CN103297126A (en) * | 2013-06-07 | 2013-09-11 | 广西师范大学 | PON (passive optical network) line fault monitoring method and device based on optical mark method |
| CN103560827A (en) * | 2013-10-18 | 2014-02-05 | 华为技术有限公司 | Fault detection method and device |
| CN105743568A (en) * | 2014-12-08 | 2016-07-06 | 上海贝尔股份有限公司 | Fiber link detection method and device in PON system |
| CN109921847A (en) * | 2019-04-15 | 2019-06-21 | 中国电力科学研究院有限公司 | The localization method and system of fault branch in a kind of passive optical network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2518262Y (en) * | 2002-01-18 | 2002-10-23 | 北京北邮电信科技股份有限公司 | Automatic monitor for optical cable |
| CN101217313A (en) * | 2008-01-11 | 2008-07-09 | 北京邮电大学 | A fault diagnosis method applied OTDR passive optical network optical fiber |
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| CN102118658A (en) * | 2009-12-31 | 2011-07-06 | 华为技术有限公司 | Method and device for port identification of light splitter |
| CN103297126A (en) * | 2013-06-07 | 2013-09-11 | 广西师范大学 | PON (passive optical network) line fault monitoring method and device based on optical mark method |
| CN103297126B (en) * | 2013-06-07 | 2016-06-22 | 广西师范大学 | The PON line fault monitoring method of optically-based labelling method and device thereof |
| CN103560827A (en) * | 2013-10-18 | 2014-02-05 | 华为技术有限公司 | Fault detection method and device |
| CN103560827B (en) * | 2013-10-18 | 2016-08-24 | 华为技术有限公司 | Fault detection method and device |
| CN105743568A (en) * | 2014-12-08 | 2016-07-06 | 上海贝尔股份有限公司 | Fiber link detection method and device in PON system |
| CN109921847A (en) * | 2019-04-15 | 2019-06-21 | 中国电力科学研究院有限公司 | The localization method and system of fault branch in a kind of passive optical network |
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