CN102065185A - Method and device for detecting link fault of digital subscriber line DSL (Digital Subscriber Line) circuit board - Google Patents
Method and device for detecting link fault of digital subscriber line DSL (Digital Subscriber Line) circuit board Download PDFInfo
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- CN102065185A CN102065185A CN2011100027994A CN201110002799A CN102065185A CN 102065185 A CN102065185 A CN 102065185A CN 2011100027994 A CN2011100027994 A CN 2011100027994A CN 201110002799 A CN201110002799 A CN 201110002799A CN 102065185 A CN102065185 A CN 102065185A
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Abstract
The invention relates to the field of broadband access, in particular to a method for detecting a link fault of a digital subscriber line DSL (Digital Subscriber Line) circuit board, which is used for solving the problem that which link has a fault cannot be located in the DSL circuit board. The method comprises the following steps: a digital signal processor DSP in the DSL circuit board acquires a detection command, and sends a pseudo-random cell signal to a detected point according to the location information of the detected point in the DSP, wherein the location information comprises information of the link of the detected point and location information of the detected point in the link; and when the DSP does not receive the pseudo-random cell signal returned by the link in a preset waiting time, the link before the detected point is determined to have a fault. Therefore, whether the link before the detected pointed has the fault or not can be quickly located by adopting the method of determining whether the DSP can receive the pseudo-random cell signal sent to the detected point or not, and the link having the fault can be located.
Description
Technical field
The present invention relates to the broadband access field, relate in particular to digital user wire DSL circuit board link failure detection method and device.
Background technology
Continuous development along with network technology, Digital Subscriber Line (Digital Subscriber Line, DSL) technology has obtained swift and violent popularization and development, present operational DSL is of a great variety, ADSL (Asymmetric Digital Subscriber Line) (Asymmetric Digital Subscriber Line for example, ADSL), very-high-bit-rate digital subscriber loop (Very-high-bit-rate Digital Subscriber Loop, VDSL) etc.Along with increasing of DSL subscriber, demand to the DSL circuit board is also increasing, this has just strengthened the production to the DSL circuit board, and a necessary link is tested the DSL circuit board exactly aborning, because production technology is all similar at present, therefore, the speed to the DSL circuit board testing will directly influence production efficiency.
The test mode of using is port connection modulator-demodulator (Modem) and the tester at the DSL circuit board at present, the actual user uses under the prerequisite of scene in simulation, test by the method that tester is measured, as shown in Figure 1, detailed process is: be at link under the state of operate as normal, tester sends to Devices to test and is used for testing data packet, turns back to tester behind this packet process Devices to test, Modem, the switch; When if tester does not receive the packet that returns, illustrate that then link disconnects; When tester does not receive packet for a long time, might produce packet loss or wrong bag, when packet loss, when Packet Error Rate exceeds normal range (NR), can judge that link performance is poor, promptly break down; Conventional test methodologies judges by the way promptly whether link is in malfunction; But the inventor finds to exist in the existing measuring technique following defective:
The first, owing to the scene that needs the simulation actual user to use, and building of this scene is very complicated, therefore can have outside destabilizing factor, and this will directly cause test result inaccurate;
The second, the method for utilizing tester to measure needs the regular hour can guarantee the accuracy of testing, and therefore test will consume for a long time, causes production efficiency low;
Three, certain the bar link that is merely able in the prior art detect in the DSL circuit board breaks down, and is which section link breaks down but can't specifically locate actually.
Summary of the invention
The embodiment of the invention provides a kind of digital user wire DSL circuit board loopback link failure detection method, is used for solving the problem that can't locate which section link occurs fault at the DSL circuit board.
A kind of digital user wire DSL circuit board loopback link failure detection method, described method comprises:
Digital signal processor DSP in the DSL circuit board obtains sense command, and according to the positional information of wherein tested measuring point, send the pseudorandom cell signal to this tested measuring point, described positional information comprises the information and the positional information of described tested measuring point in this link of tested measuring point place link;
When DSP does not receive the pseudorandom cell signal that described link returns in the predefined stand-by period, determine that the link before the described tested measuring point breaks down.
A kind of digital user wire DSL circuit board loopback link failure detection device, this device comprises:
Loopback link acquisition module is used to obtain sense command;
Loopback link sending module, be used for positional information according to the tested measuring point of sense command, send the pseudorandom cell signal to this tested measuring point, described positional information comprises the information and the positional information of described tested measuring point in this link of tested measuring point place link;
Loopback link determination module when being used for not receiving the pseudorandom cell signal that described link returns in the predefined stand-by period, determines that the link before the described tested measuring point breaks down.
Adopt the present invention can be by the positional information of the tested measuring point that carries in the sense command, determine this tested measuring point in link particular location, send the pseudorandom cell signal by DSP to this tested measuring point then, this pseudorandom cell signal can return to DSP automatically under the unimpeded situation of link; When not receiving the pseudorandom cell signal of returning in the stand-by period that DSP is setting in advance, determine that the link before this tested measuring point breaks down; This shows use the present invention can be positioned at which section link occurs fault fast;
The embodiment of the invention provides a kind of DSL Digital Subscriber Line Circuit plate non-loopback link failure detection method, is used for improving the efficient that detects DSL circuit board faulty link.
The non-loopback link failure detection method of a kind of DSL Digital Subscriber Line Circuit plate, described method comprises:
Digital signal processor DSP in the DSL circuit board obtains sense command, and according to the positional information of wherein band signal, downstream bands and detected link, send described band signal by described downstream bands to detected link, described positional information comprises the positional information of detected link in the DSL circuit board;
DSP detects the interference value that described band signal produces described upstream band in the upstream band of described downstream bands correspondence, when described interference value exceeds predefined interference value scope, determines that described detected link breaks down.
The non-loopback link failure detection of a kind of digital user wire DSL circuit board device, described device comprises:
Non-loopback link acquisition module is used to obtain sense command;
Non-loopback link sending module, the positional information that is used for band signal, downstream bands and detected link according to sense command, send described band signal by described downstream bands to described detected link, described positional information comprises the positional information of detected link in the DSL circuit board;
Non-loopback link determination module, be used for detecting the interference value that described band signal produces described upstream band in the upstream band of described downstream bands correspondence, be used for when described interference value exceeds predefined interference value scope, determining that described detected link breaks down.
Adopt the present invention can be by the positional information of the band signal, downstream bands and the detected link that carry in the sense command, determine the particular location of this detected link in the DSL circuit board, DSP sends band signal by downstream bands to this detected link then; DSP detects the interference value that this band signal produces described upstream band in upstream band, when this interference value exceeds predefined interference value scope, can determine to break down at this detected link; Owing to adopt the present invention, when the link in the DSL circuit board is detected, only need send band signal in downstream bands, DSP detects in upstream band and can obtain testing result immediately simultaneously, therefore, adopt the present invention can reduce the detection required time greatly, improve detection efficiency.
Description of drawings
Fig. 1 detects the required simulated scenario structural representation of DSL circuit board in the prior art;
The schematic flow sheet of a kind of digital user wire DSL circuit board loopback chain circuit detecting method that Fig. 2 provides for the embodiment of the invention;
The schematic flow sheet of a kind of digital user wire DSL circuit board acyclic loop link detection method that Fig. 3 provides for the embodiment of the invention;
The digital user wire DSL board structure of circuit schematic diagram that Fig. 4 provides for the embodiment of the invention;
The structural representation of a kind of digital user wire DSL circuit board loopback link detecting device that Fig. 5 provides for the embodiment of the invention one;
The structural representation of the non-loopback link detecting of a kind of digital user wire DSL circuit board device that Fig. 6 provides for the embodiment of the invention two.
Embodiment
The embodiment of the invention provides digital user wire DSL circuit board link failure detection method, and this method specifically comprises following two kinds of detection modes:
First kind, a kind of digital user wire DSL circuit board loopback link failure detection method, this method is by the positional information of the tested measuring point that carries in the sense command, determine this tested measuring point in link particular location, send the pseudorandom cell signal by DSP to this tested measuring point then, this pseudorandom cell signal can return to DSP automatically under the unimpeded situation of link; When not receiving the pseudorandom cell signal of returning in the stand-by period that DSP is setting in advance, determine that the link before this tested measuring point breaks down, described pseudorandom cell signal can be returned DSP automatically under the unimpeded situation of link; Described loopback link be meant the pseudorandom cell signal when arriving assigned address and can return DSP the link of process; As shown in Figure 2, concrete steps are as follows:
A, when DSP does not receive the pseudorandom cell signal returned and current tested measuring point for first test point on the link in the predefined stand-by period, DSP sends the pseudorandom cell signal to the previous test point of current tested measuring point;
B, if DSP receives the pseudorandom cell signal of returning in the predefined stand-by period, determine that then previous test point breaks down to the link between the current tested measuring point; Otherwise, should previous test point as current tested measuring point, return steps A.
After step 12, further comprise: the information that DSP breaks down the link before the tested measuring point sends to display interface and shows.
Second kind, the non-loopback link failure detection method of a kind of digital user wire DSL circuit board, this method is by the positional information of the band signal, downstream bands and the detected link that carry in the sense command, determine the particular location of this detected link in the DSL circuit board, DSP sends band signal by downstream bands to this detected link then; DSP detects the interference value that the downstream bands signal produces described upstream band in upstream band, when this interference value during not in predefined interference value scope, can determine that this detected link breaks down, and as shown in Figure 3, concrete steps are as follows:
After step 22, further comprise: the information that DSP breaks down detected link sends to display interface and shows.
Described band signal is used for corresponding test item, and each band signal transmits in its corresponding downstream frequency band; Described non-loopback link is meant that DSP sends band signal by down link, and when up link detects the interference value that this band signal produces described up link required link; Described interference value scope is the scope of prior art midband signal generation interference value.
Below introduce in detail with specific embodiment:
Embodiment one:
The embodiment of the invention one provides a kind of digital user wire DSL circuit board loopback link detection method, and this method is by sending the pseudorandom cell signal by DSP to tested measuring point, and described pseudorandom cell signal can be returned DSP automatically under the unimpeded situation of link; Whether the DSP basis receives the pseudorandom cell signal of returning is determined whether detected link is unimpeded; Described loopback link be meant the pseudorandom cell signal when arriving assigned address and can return DSP the link of process; As shown in Figure 4, introducing for convenience, only draw out 4 ports in this DSL circuit board, is respectively port i, port j, port m and port n; And be all external resistance of each port, the resistance of this resistance can be arbitrary value, 100 ohm of preferable selections; Each port all passes through identical link and links to each other with DSP; Link in the embodiment of the invention comprises four test points, and first test point is the interface that DSP is connected with link; Second test point be AFE (analog front end) (Analog Front End, AFE), its major function is to carry out digital-to-analog, the conversion of analog/digital; The 3rd test point is that (LineDriver, LD), in actual applications, the pseudorandom cell signal is to send to Modem by LD to line driver.In embodiments of the present invention, do not need Modem, the substitute is the port that is connected on circuit with the resistance of a default resistance value as impedance as subtest equipment; The 4th test point is the port of DSP; The detection detailed process is as follows:
Step 31, operating personnel import sense command in operation interface, after the CPU on the DSL circuit board receives this sense command, trigger DSP and begin to detect;
The positional information that comprises tested measuring point in the described sense command; Described positional information comprises the information and the positional information of described tested measuring point in this link of tested measuring point place link; Described link information can be used for describing all link informations of DSP, also can be used for describing certain bar or a few link informations among the DSP;
Step 32, DSP sends the pseudorandom cell signal according to described positional information to the pairing tested measuring point of this positional information;
In this step, according to link information in the step 31 the result specifically is set, DSP can send the pseudorandom cell signal by the tested measuring point in all links; Also can send the pseudorandom cell signal to certain bar of appointment or the tested measuring point of a few links;
Step 33, DSP judges according to whether receiving the pseudorandom cell signal of returning whether the link before this current detected point breaks down; Comprise in this step:
When DSP receives the pseudorandom cell signal of returning in the predefined stand-by period, illustrate that then the link before this current detected point is in normal operating conditions:
When DSP does not receive the pseudorandom cell signal of returning in the predefined stand-by period, finish following steps:
A, when DSP does not receive the pseudorandom cell signal returned and current tested measuring point for first test point on the described link in the predefined stand-by period, DSP sends the pseudorandom cell signal to the previous test point of current tested measuring point;
B, if DSP receives the pseudorandom cell signal of returning in the predefined stand-by period, determine that then described previous test point breaks down to the link between the current tested measuring point; Otherwise, should previous test point as current tested measuring point, return steps A;
Step 34, the information that DSP breaks down the link before the described tested measuring point sends to display interface by CPU and shows.
Embodiment two:
The embodiment of the invention two provides the detection method of the non-loopback link of a kind of digital user wire DSL circuit board, and the structure of this DSL circuit board can be referring to Fig. 4 and embodiment one; According to the project difference that detects, the band signal that is used to detect that DSP sends is also inequality in this method, and each band signal need transmit in the downstream bands of appointment; Because test item is of a great variety, to introduce for convenience, the embodiment of the invention is mainly introduced following four kinds of test items, and every kind of band signal that test item is required:
(1) end test (Quiet Noise Test) of making an uproar, be used to judge link the end situation of making an uproar; Use end noise cancellation signal Quiet to detect as band signal, noise cancellation signal of the described end is used to describe the white noise of circuit under off position;
(2) (THRL Test) tested in the return loss of Hybrid circuit, is used to judge the return loss situation of Hybrid circuit; Use reflected signal REVERB to test as band signal, described reflected signal when being used for receiving this signal according to local side and terminal, is determined automatic gaining controling parameter;
(3) total harmonic wave imbalance and noise testing (THDandNoise Test) are used to judge that total harmonic wave is lacked of proper care and the situation of noise; Use the REVERB band signal to test;
(4) the AFE peak value is tested (AFE Crest Test), is used to judge the situation of AFE peak value; Use the band signal of a kind of similar REVERB to detect; The band signal of this similar REVERB is a kind ofly to have specificly, and often than the signal of higher crest factor (Crest Factor), the amplitude of oscillation of the signal of this peak value factor is quite big, can test the driving force of LD and Linearity etc.;
The present invention specifically may further comprise the steps:
Described sense command comprises the positional information of band signal, downstream bands and detected link; Described positional information comprises the positional information of detected link in the DSL circuit board; The positional information of described link can be used for describing the positional information of all links of DSP, also can be used for describing certain bar among the DSP or the positional information of a few links;
In this step, according to the positional information of link in the step 41 the result specifically is set, DSP can send band signals as all links; Also can send band signal to certain bar or a few links of appointment;
Embodiment three:
The embodiment of the invention also provides a kind of digital user wire DSL board failure chain circuit detecting method that embodiment one and embodiment two-phase are used in combination, and the function of the structure of the DSL circuit board that the embodiment of the invention provides and a link is referring to Fig. 4 and embodiment one; Operating personnel can according to actual needs that the test item among method among the embodiment one and the embodiment two is required detection method carry out combination in any, so that reach the testing goal of wanting;
Preferable, (2), (3) that provide among method that embodiment one can be provided and the embodiment two, (4) required method of test item combine and use in actual use.
As shown in Figure 5, a kind of digital user wire DSL circuit board loopback link failure detection device, this device comprises:
Loopback link acquisition module 41 is used to obtain sense command;
Loopback link sending module 42 is used for the positional information according to the tested measuring point of sense command, sends the pseudorandom cell signal to this tested measuring point; Described positional information comprises the information and the positional information of described tested measuring point in this link of tested measuring point place link;
Loopback link determination module 43 when being used for not receiving the pseudorandom cell signal that described link returns in the predefined stand-by period, determines that the link before the described tested measuring point breaks down.
Preferable, described loopback link determination module 43 is used to carry out following steps:
A, when DSP does not receive the pseudorandom cell signal returned and current tested measuring point for first test point on the described link in the predefined stand-by period, DSP sends the pseudorandom cell signal to the previous test point of current tested measuring point;
B, if DSP receives the pseudorandom cell signal of returning in the predefined stand-by period, determine that then described previous test point breaks down to the link between the current tested measuring point; Otherwise, should previous test point as current tested measuring point, return steps A.
Concrete, described device also further comprises:
Loopback link information sending module 44 is used for that the information that the link before the described tested measuring point breaks down is sent to display interface and shows.
As shown in Figure 6, the non-loopback link failure detection of a kind of digital user wire DSL circuit board device, described device comprises:
Non-loopback link acquisition module 51 is used to obtain sense command;
Non-loopback link sending module 52 is used for the positional information of band signal, downstream bands and detected link according to sense command, sends described band signal by described downstream bands to described detected link; Described positional information comprises the positional information of detected link in the DSL circuit board;
Non-loopback link determination module 53, be used for detecting the interference value that described band signal produces described upstream band in the upstream band of described downstream bands correspondence, when described interference value exceeds predefined interference value scope, determine that described detected link breaks down.
Concrete, described device also comprises:
Non-loopback link information sending module 54 is used for that the information that described detected link breaks down is sent to display interface and shows.
In sum, beneficial effect of the present invention:
The first, when adopting first kind of detection method provided by the invention, DSP can be according to the more specific location information of tested measuring point, send pseudorandom cell information to this tested measuring point, and determine that when DSP does not receive the pseudorandom cell signal of returning the link before this tested measuring point breaks down; As seen adopting first kind of detection method provided by the invention can determine in the DSL circuit board specifically is which section link breaks down;
When adopting second kind of detection method provided by the invention, DSP is according to the more specific location information of detected link, send the required band signal of test item by downstream bands to this detected link, and detect this band signal to interference value that upstream band produced in upstream band, when this interference value exceeds predefined interference value scope, determine that this detected link breaks down; As seen adopting second kind of detection method provided by the invention can determine in the DSL circuit board specifically is which bar link breaks down;
Adopt any one of above-mentioned two kinds of methods, can reach following 2 beneficial effects:
The second, adopt method provided by the invention, only need impedance, can detect, avoided in the prior art because the scene that needs the simulation actual user to use in the external certain resistance in DSL port, therefore can there be outside destabilizing factor, causes the inaccurate phenomenon of test result;
Three, adopt method provided by the invention, be to determine that by the signal that transmission is used to detect which section link or which bar link produce fault, so required time is shorter, for producing the DSL circuit board, will reduce production when especially producing in enormous quantities, enhance productivity greatly.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. digital user wire DSL circuit board loopback link failure detection method is characterized in that described method comprises:
Digital signal processor DSP in the DSL circuit board obtains sense command, and according to the positional information of tested measuring point wherein, send the pseudorandom cell signal to this tested measuring point, described positional information comprises the information and the positional information of described tested measuring point in this link of tested measuring point place link;
When DSP does not receive the pseudorandom cell signal that described link returns in the predefined stand-by period, determine that the link before the described tested measuring point breaks down.
2. DSL circuit board loopback link failure detection method as claimed in claim 1, it is characterized in that, when described DSP does not receive the pseudorandom cell signal that described link returns in the predefined stand-by period, determine that link before the described tested measuring point breaks down to comprise:
A, when DSP does not receive the pseudorandom cell signal returned and current tested measuring point for first test point on the described link in the predefined stand-by period, DSP sends the pseudorandom cell signal to the previous test point of current tested measuring point;
B, if DSP receives the pseudorandom cell signal of returning in the predefined stand-by period, determine that then described previous test point breaks down to the link between the current tested measuring point; Otherwise, should previous test point as current tested measuring point, return steps A.
3. DSL circuit board loopback link failure detection method as claimed in claim 1 or 2 is characterized in that, after the method that the link before described DSP determines this tested measuring point breaks down, further comprises:
The information that DSP breaks down the link before the described tested measuring point sends to display interface and shows.
4. non-loopback link failure detection method of digital user wire DSL circuit board is characterized in that described method comprises:
Digital signal processor DSP in the DSL circuit board obtains sense command, and according to the positional information of wherein band signal, downstream bands and detected link, send described band signal by described downstream bands to described detected link, described positional information comprises the positional information of detected link in the DSL circuit board;
DSP detects corresponding downstream bands to the interference value that upstream band produced in described upstream band, when described interference value exceeds predefined interference value scope, determines that described detected link breaks down.
5. the non-loopback link failure detection method of DSL circuit board as claimed in claim 4 is characterized in that,, further comprises after DSP determines method that this detected link breaks down described:
DSP sends to display interface with the information of described detected link and shows.
6. digital user wire DSL circuit board loopback link failure detection device is characterized in that this device comprises:
Loopback link acquisition module is used to obtain sense command;
Loopback link sending module, be used for positional information according to the tested measuring point of sense command, send the pseudorandom cell signal to this tested measuring point, described positional information comprises the information and the positional information of described tested measuring point in this link of tested measuring point place link;
Loopback link determination module when being used for not receiving the pseudorandom cell signal that described link returns in the predefined stand-by period, determines that the link before the described tested measuring point breaks down.
7. DSL circuit board loopback link failure detection device as claimed in claim 6 is characterized in that described loopback link determination module is used to carry out following steps:
A, when in the predefined stand-by period, not receiving the pseudorandom cell signal returned and current tested measuring point for first test point on the described link, DSP sends the pseudorandom cell signal to the previous test point of current tested measuring point;
B, if in the predefined stand-by period, receive the pseudorandom cell signal of returning, determine that then described previous test point breaks down to the link between the current tested measuring point; Otherwise, should previous test point as current tested measuring point, return steps A.
8. DSL circuit board loopback link failure detection device as claimed in claim 6 is characterized in that described device also comprises:
Loopback link information sending module is used for that the information that the link before the described tested measuring point breaks down is sent to display interface and shows.
9. the non-loopback link failure detection of digital user wire DSL circuit board device is characterized in that described device comprises:
Non-loopback link acquisition module is used to obtain sense command;
Non-loopback link sending module, the positional information that is used for band signal, downstream bands and detected link according to sense command, send described band signal by described downstream bands to detected link, described positional information comprises the positional information of detected link in the DSL circuit board;
Non-loopback link determination module, be used for detecting the interference value that described band signal produces described upstream band in the upstream band of described downstream bands correspondence, when described interference value exceeds predefined interference value scope, determine that described detected link breaks down.
10. the non-loopback link failure detection of DSL circuit board as claimed in claim 9 device is characterized in that described device also comprises:
Non-loopback link information sending module is used for information with described detected link and sends to display interface and show.
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