CN110324066A - A kind of hfc plant failure analysis methods and device based on CM pre-equalization values - Google Patents
A kind of hfc plant failure analysis methods and device based on CM pre-equalization values Download PDFInfo
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- CN110324066A CN110324066A CN201910614396.1A CN201910614396A CN110324066A CN 110324066 A CN110324066 A CN 110324066A CN 201910614396 A CN201910614396 A CN 201910614396A CN 110324066 A CN110324066 A CN 110324066A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/14—Control of transmission; Equalising characterised by the equalising network used
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03343—Arrangements at the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
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Abstract
The disclosure is directed to a kind of hfc plant failure analysis methods, device, electronic equipment and storage mediums based on CM pre-equalization values.Wherein, this method comprises: acquiring in the pre equalizer inside CM, the pre-equalization coefficients of each linear filter are as the parameter for judging hfc plant failure；Derivative parameter is generated according to hfc plant fault parameter, and in the corresponding table of default derivative parameter and nature of trouble, searches the corresponding nature of trouble of abnormal derivative parameter, determines fault category and fault degree；Co-route, the positioning of complete paired fault are analyzed according to the nature of trouble.The disclosure realizes the positive location and exclusion of the fault point in network by active Breakdown Maintenance technology, and reducing failure influences customer service, improves carrier service level.
Description
Technical field
This disclosure relates to communication field, in particular to a kind of hfc plant accident analysis side based on CM pre-equalization values
Method, device, electronic equipment and computer readable storage medium.
Background technique
Hfc plant is chronically exposed in air, is easy to be influenced by sunshine and rainwater, dust etc., so that in hfc plant
Each equipment (head end, terminal, light station), device (amplifier, attenuator, splitter, distributor), every section of cable is likely to out
Existing problem.It is little to the influence of user on the surface that some are present in " minor issue " in network, or even to transmission signal matter
Amount there is no too big variation, but the influence to whole system is immeasurable, it is possible to can cause entirely be
The decline for index of uniting, or it is elongated with the time, and " small " failure is increasingly severe, finally influences customer service.So for
Failure will find to diagnose and position as early as possible as early as possible, exclude as early as possible.
In terms of fault diagnosis, current main method both at home and abroad is showed based on what signal after experience and failure showed
As progress, the phenomenon that wherein failure causes, includes:
1) user side perceive, such as break often, speed is low, and packet loss is serious, have several channel pictures do not know even without
Signal etc.；
2) network management side perceives, and inquires the FEC Bit Error Code Statistics of user are serious, and level is inadequate or SNR is low etc..
Know phenomenon of the failure, analyze its possible reason, carries out fault diagnosis and exclusion.For judging location of fault,
Common method has at present: step-sizing method, method of searching for by following the clues, again implantation etc..The above method, is all built upon failure
It after influence business, then is positioned and is excluded, referred to as " reaction equation Breakdown Maintenance ".So-called " reaction equation " refers to that user feels
Know that quality of service has declined, phone feeds back to operator, and operator makes a response again, is safeguarded；When maintenance positioning also
User network may be interrupted to be checked, so traditional " reaction equation " Breakdown Maintenance method has some disadvantages and limits to
Property.
Therefore, it is necessary to one or more methods to solve the above problems.
It should be noted that information is only used for reinforcing the reason to the background of the disclosure disclosed in above-mentioned background technology part
Solution, therefore may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
The disclosure is designed to provide a kind of hfc plant failure analysis methods, device, electronics based on CM pre-equalization values
Equipment and computer readable storage medium, so overcome limitation and defect due to the relevant technologies at least to a certain extent and
One or more caused problem.
According to one aspect of the disclosure, a kind of hfc plant failure analysis methods based on CM pre-equalization values are provided, are wrapped
It includes:
Parameter acquisition step, acquire cable modem (CM) inside pre equalizer in, each linear filter
Pre-equalization coefficients are as the parameter for judging hybrid fiber coax (hfc plant) failure；
Accident analysis step generates derivative parameter according to hfc plant fault parameter, and default derivative parameter with it is fault
In the correspondence table of matter, the corresponding nature of trouble of abnormal derivative parameter is searched, determines fault category and fault degree；
Fault location step analyzes co-route, the positioning of complete paired fault according to the nature of trouble.
In a kind of exemplary embodiment of the disclosure, the parameter acquisition step further include:
It is pre- by the ranging message acquisition CM between CM and Cable Modem Terminal System (CMTS) based on Docsis3.0
Equalizing coefficient, the CM pre-equalization coefficients ranging period are less than 30s.
In a kind of exemplary embodiment of the disclosure, the accident analysis step further includes analyzing the tap of pre equalizer
Coefficient:
The pre equalizer includes 24 tap coefficients, and maximum No. 8 tap of amplitude is main tapping, and 1~No. 7 tap is used
Group delay in compensated line is known as preceding tap, after being mainly used for micro- reflection in compensated line referred to as in 9~No. 24 taps
Tap；
The tap coefficient is plural number, including real and imaginary parts:
The real part of N number of tap coefficient are as follows: FnR；
The imaginary part of N number of tap coefficient is respectively as follows: FnI.
In a kind of exemplary embodiment of the disclosure, the accident analysis step further include:
According to hfc plant fault parameter, calculate separately derivative parameter, the derivative parameter include main tapping energy MTNE,
Preceding tap energies PreMTE, rear tap energies PostMTE, total tap energies TTE, main tapping compression MTC, non-main tapping and total energy
Amount is than NMTER, preceding tap and gross energy ratio PreMTTER, rear tap and gross energy ratio PostMTTER, front and back tap energies ratio
Distance TDR, micro- reflection levels MRLevel between PPEsR, fault point.
In a kind of exemplary embodiment of the disclosure, the accident analysis step further include:
It is calculated according to parameter and preset value, foundation derives the corresponding table of parameter and nature of trouble；
Derivative parameter is generated according to hfc plant fault parameter, and in the corresponding table of the derivative parameter and nature of trouble,
The corresponding nature of trouble of abnormal derivative parameter is searched, determines that fault category and fault degree, the fault category include water inlet, pine
Dynamic, short circuit.
In a kind of exemplary embodiment of the disclosure, the fault location step further include:
Failure grouping is analyzed the nature of trouble and carried out, the co-route with group failure is analyzed；
According to the distance TDR analysis between fault point with the failure of co-route in group failure, the failure of the failure is determined
The position of point, the positioning of complete paired fault.
In one aspect of the present disclosure, a kind of hfc plant fail analysis device based on CM pre-equalization values is provided, comprising:
Parameter collection module, in the pre equalizer of the inside for acquiring cable modem (CM), each linear filtering
The pre-equalization coefficients of device are as the parameter for judging hybrid fiber coax (hfc plant) failure；
Failure analysis module, for deriving parameter and event according to the derivative parameter of hfc plant fault parameter generation, and default
In the correspondence table for hindering property, the corresponding nature of trouble of abnormal derivative parameter is searched, determines fault category and fault degree；
Fault location module, for analyzing co-route, the positioning of complete paired fault according to the nature of trouble.
In one aspect of the present disclosure, a kind of electronic equipment is provided, comprising:
Processor；And
Memory is stored with computer-readable instruction on the memory, and the computer-readable instruction is by the processing
The method according to above-mentioned any one is realized when device executes.
In one aspect of the present disclosure, a kind of computer readable storage medium is provided, computer program is stored thereon with, institute
State realization method according to above-mentioned any one when computer program is executed by processor.
The hfc plant failure analysis methods based on CM pre-equalization values in the exemplary embodiment of the disclosure acquire in CM
In the pre equalizer in portion, the pre-equalization coefficients of each linear filter are as the parameter for judging hfc plant failure；According to hfc plant
Fault parameter generates derivative parameter, and in the corresponding table of default derivative parameter and nature of trouble, searches abnormal derivative parameter pair
The nature of trouble answered determines fault category and fault degree；Co-route is analyzed according to the nature of trouble, complete paired fault
Positioning.On the one hand, the disclosure is by being considered as detector for each CM and other equipment, minor change and event that monitoring network occurs
Barrier, the intensity of type and failure to failure provide corresponding quantizating index；On the other hand, the disclosure passes through active failure
Maintenance technology realizes the positive location and exclusion of the fault point in network, and reducing failure influences customer service, improves fortune
Seek quotient's service level.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The disclosure can be limited.
Detailed description of the invention
Its example embodiment is described in detail by referring to accompanying drawing, the above and other feature and advantage of the disclosure will become
It is more obvious.
Fig. 1 shows the hfc plant accident analysis side based on CM pre-equalization values according to one exemplary embodiment of the disclosure
The flow chart of method；
Fig. 2 shows according to the hfc plant pre equalizer based on CM pre-equalization values of one exemplary embodiment of the disclosure
Structural schematic diagram；
Fig. 3 shows the hfc plant accident analysis side based on CM pre-equalization values according to one exemplary embodiment of the disclosure
The pre-equalization coefficients value of method and with interior frequency response schematic diagram；
Fig. 4 shows the hfc plant accident analysis side based on CM pre-equalization values according to one exemplary embodiment of the disclosure
The PNM paralell composition of method；
Fig. 5 show according to one exemplary embodiment of the disclosure there are the hfc plant schematic diagrames of failure；
Fig. 6 show according to one exemplary embodiment of the disclosure there are the hfc plant part CM of failure with interior frequency response
Curve；
Fig. 7 shows the hfc plant accident analysis dress based on CM pre-equalization values according to one exemplary embodiment of the disclosure
The schematic block diagram set；
Fig. 8 diagrammatically illustrates the block diagram of the electronic equipment according to one exemplary embodiment of the disclosure；And
Fig. 9 diagrammatically illustrates the schematic diagram of the computer readable storage medium according to one exemplary embodiment of the disclosure.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be real in a variety of forms
It applies, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the disclosure will be comprehensively and complete
It is whole, and the design of example embodiment is comprehensively communicated to those skilled in the art.Identical appended drawing reference indicates in figure
Same or similar part, thus repetition thereof will be omitted.
In addition, described feature, structure or characteristic can be incorporated in one or more implementations in any suitable manner
In example.In the following description, many details are provided to provide and fully understand to embodiment of the disclosure.However,
It will be appreciated by persons skilled in the art that can be with technical solution of the disclosure without one in the specific detail or more
It is more, or can be using other methods, constituent element, material, device, step etc..In other cases, it is not shown in detail or describes
Known features, method, apparatus, realization, material or operation are to avoid fuzzy all aspects of this disclosure.
Block diagram shown in the drawings is only functional entity, not necessarily must be corresponding with physically separate entity.
I.e., it is possible to realize these functional entitys using software form, or these are realized in the module of one or more softwares hardening
A part of functional entity or functional entity, or realized in heterogeneous networks and/or processor device and/or microcontroller device
These functional entitys.
In this exemplary embodiment, a kind of hfc plant failure analysis methods based on CM pre-equalization values are provided firstly；Ginseng
It examines shown in Fig. 1, being somebody's turn to do the hfc plant failure analysis methods based on CM pre-equalization values may comprise steps of:
Parameter acquisition step S110, acquire cable modem (CM) inside pre equalizer in, each linear filtering
The pre-equalization coefficients of device are as the parameter for judging hybrid fiber coax (hfc plant) failure；
Accident analysis step S120, according to the derivative parameter of hfc plant fault parameter generation, and in default derivative parameter and event
In the correspondence table for hindering property, the corresponding nature of trouble of abnormal derivative parameter is searched, determines fault category and fault degree；
Fault location step S130 analyzes co-route, the positioning of complete paired fault according to the nature of trouble.
On the one hand, the disclosure is by being considered as detector, the minor change that monitoring network occurs for each CM and other equipment
And failure, the intensity of type and failure to failure provide corresponding quantizating index；On the other hand, the disclosure passes through active
Breakdown Maintenance technology realizes the positive location and exclusion of the fault point in network, and reducing failure influences customer service, improves
Carrier service is horizontal.
In the following, by carrying out the hfc plant failure analysis methods based on CM pre-equalization values in this example embodiment into one
The explanation of step.
In parameter acquisition step S110, in pre equalizer that the inside of cable modem (CM) can be acquired, respectively
The pre-equalization coefficients of linear filter are as the parameter for judging hybrid fiber coax (hfc plant) failure.
In this exemplary embodiment, the parameter acquisition step further include:
It is pre- by the ranging message acquisition CM between CM and Cable Modem Terminal System (CMTS) based on Docsis3.0
Equalizing coefficient, the CM pre-equalization coefficients ranging period are less than 30s.
In this exemplary embodiment, there are many technical specification under hfc plant, wherein DOCSIS (data over cable industry
Business interface specification) using advanced physical-layer techniques and efficient MAC layer realize terminal (CM, cable modem) and head end
The high-speed transfer of interaction data between (CMTS, Cable Modem Terminal System).Equipment, device when hfc plant
Or cable is when something goes wrong, the uplink signal of hfc plant can be made by the influence of various line distortions, such as group delay, micro- reflection
Deng.Wherein, micro- reflection is also referred to as echo, mainly due to caused by the impedance mismatch point on network, such as joint looseness, electricity
Cable water inlet corrosion, cable bend, the aging etc. of amplifier can all lead to impedance mismatch, generate micro- reflection.Mismatch is occurring
The energy in place, a part of incidence wave is reflected back, and the wave and incidence wave being reflected back are overlapped mutually to form standing wave.So letter
When number reaching CMTS, it can see that the amplitude-frequency characteristic (response curve of amplitude and frequency) of signal rises using frequency sweep equipment
Volt or unevenness.In order to which the line distortion to HFC compensates, D0csIs3.0 (also including DOcsIs2, o) defines pre- equal
Weighing apparatus (pre-equalization).As soon as there is a pre equalizer inside each CM, signal can be made to obtain before CM transmitting
Contrary compensation.When signal is by distortion route, when reaching CMTS, amplitude-frequency characteristic just becomes flat.
Pre equalizer defined in Docsis3.0 is the linear filter with 24 tap coefficients, this 24 are
Several to be then known as pre-equalization coefficients, being illustrated in figure 2 is equalizer processes structure, and the time delay of each tap is 1 symbol
(symb01), each tap has different amplitudes.It is illustrated in figure 3 the range value and amplitude-frequency characteristic schematic diagram of pre-equalization coefficients,
The amplitude curve (or amplitude-frequency characteristic) with interior frequency response can be acquired after Fourier transformation.
CM pre-equalization coefficients in Docsis3.0 are the ranging messages asked by CM and CMTS to obtain, and CM is being added
The parameters such as timing slip, level, frequency and pre-equalization coefficients are adjusted by initial ranging before network.During normal operation, CM is logical
It crosses Perodic ranging and adjusts the above parameter, to guarantee the lasting reliable communication of CM and head end, the ranging period is generally less than 30s.
Pre-equalization coefficients can be distorted from the failure in the angle respite route of data processing, to mask network
The variation of quality index, such as the raising of FEC error code, the variation etc. of SNR, so user experience quality will not decline.But this
When failure occur.
Pre-equalization coefficients value and with interior frequency response cable failure etc.) still be located at route in, when failure deteriorates into certain journey
When spending, it will influence the business experience of user.So it is necessary to being carried out to the failure (especially glitch) that route occurs
It was found that, positioning and exclude.
Pre equalizer is to compensate for the distortion on Cable route, channel response reverse mutual of the frequency domain response with route
It mends, and coefficient update frequency is high, so pre-equalization coefficients can reflect the fault message of route in real time.Can to pre-equalization coefficients into
Row analysis, finds the failure in Cable network in advance, and positioning failure, it is this by monitor the pre-equalization coefficients of each CM into
The method of row fault diagnosis is known as PNM using Pre-equalization (PNMP).
Algorithm analysis is carried out to pre-equalization coefficients, it is possible to find positioning failure analyzes severity and type of failure etc..
In this exemplary embodiment, it is illustrated in figure 4 the basic framework of PNM system, the service of PNM first is assisted by SNMP
View acquires the parameters such as data pre-equalization coefficients, SNR, power, error code, frequency spectrum from CMTS and CM, divides the parameter of acquisition
Analysis, statistics, so that potential failure is alarmed and be positioned, carry out active maintenance.It not only can electricity where positioning failure
The specific location of cable and cable can also distinguish between the type of failure, analyze the possible reason of failure, while also to failure
Intensity provides corresponding quantizating index.Simultaneously to failure analysis result can APP or pass through IE browser real-time display.
In accident analysis step S120, derivative parameter can be generated according to hfc plant fault parameter, and derive default
For parameter with the corresponding table of nature of trouble, the corresponding nature of trouble of the derivative parameter of lookup exception determines fault category and failure journey
Degree.
In this exemplary embodiment, the accident analysis step further includes analyzing the tap coefficient of pre equalizer:
The pre equalizer includes 24 tap coefficients, and maximum No. 8 tap of amplitude is main tapping, and 1~No. 7 tap is used
Group delay in compensated line is known as preceding tap, after being mainly used for micro- reflection in compensated line referred to as in 9~No. 24 taps
Tap；
The tap coefficient is plural number, including real and imaginary parts:
The real part of N number of tap coefficient are as follows: FnR；
The imaginary part of N number of tap coefficient is respectively as follows: FnI.
In this exemplary embodiment, in 24 tap coefficients of pre equalizer, taken out based on maximum No. 8 tap of amplitude
Head, main signal will be transmitted by this tap；Tap before 1~No. 7 tap is known as the group delay in compensated line；9
It is mainly used for tap after micro- reflection in compensated line is known as in~No. 24 taps.Energy relationship between them reflects route
Fault message.Each tap coefficient is plural number, including real and imaginary parts, it will be assumed that is as follows:
The real part of 24 tap coefficients is respectively as follows: F1R, F2R ... ..., F24R.
The imaginary part of 24 tap coefficients is respectively as follows: F1I, F2I ... ..., F24I.
In this exemplary embodiment, the accident analysis step further include:
According to hfc plant fault parameter, calculate separately derivative parameter, the derivative parameter include main tapping energy MTNE,
Preceding tap energies PreMTE, rear tap energies PostMTE, total tap energies TTE, main tapping compression MTC, non-main tapping and total energy
Amount is than NMTER, preceding tap and gross energy ratio PreMTTER, rear tap and gross energy ratio PostMTTER, front and back tap energies ratio
Distance TDR, micro- reflection levels MRLevel between PPEsR, fault point.
In this exemplary embodiment, a series of parameter can be derived by 24 tap coefficients, these parameters are directed to
The quality of network is assessed, and the seriousness of failure is analyzed, and the position of guilty culprit and the type of failure is calculated, wherein leading
To include following derivative parameter:
(1) main tapping energy (MTNE, main tap nominal energy)
MTNE=F8nominalR 2+F8nominalI 2
(2) tap energies (PreMTE, pre-main tap energy) before
PreMTE=F1R2+F1I2+F2R2+F2I2+F3R2+F3I2+...+F7R2+F7I2
(3) tap energies (PostMTE, post-main tap energy) afterwards
PostMTE=F9R2+F9I2+F10R2+F10I2+...+F23R2+F23I2+F24R2
+F24I2
(4) total tap energies (TTE, total tap energy)
TTE=PreMTE+MTNE+ProStMTE
(5) main tapping compression (MTC, Main Tap Compression)
Since the number of taps of pre equalizer is limited, thus be also to the ability that line distortion compensates it is limited,
And MTC can judge the validity of equalizer compensation ability.When MTC is greater than 2dB, pre equalizer has reached the limit, can not
Success compensates existing distortion, and equilibrium is failed, and line fault at this time is extremely serious.
(6) non-main tapping and gross energy ratio (NMTER, non-main tap to total energy ratio)
NMTER can be regarded as the line build-out energy ratio to be consumed, it is possible to for measuring the seriousness of line distortion,
This value is bigger, then illustrates that line distortion is more serious, and for such CM, Yao Jinhang is more frequent to refresh monitoring in real time.
(7) tap and gross energy ratio (PreMTTER, pre-main tap to total energy ratio) before
(8) tap and gross energy ratio (PostMTTER, post-main tap to total energy ratio) afterwards
(9) front and back tap energies ratio (PPEsR, pre-post energy symmetry ratio)
What three above parameter reflected is the relationship between the tap of front and back.Different failures has different front and back taps special
Property, such as water inlet, loosening, short circuit.So the type of failure can be analyzed, and each by the distribution and ratio between the tap of front and back
The seriousness of fault type.
(10) distance between fault point (TDR, Time Domain Reflectometry)
TDR reflects location of fault information, can carry out fault location.It, can by the amplitude distribution of 24 pre-equalization coefficients
Find out the time difference of micro- transmission and reflection.By the transmission speed of time difference and signal, can calculate out of order distance is
R=(Δ T × v)/2
(11) micro- reflection levels (MRLevel, Micro-reflection Level)
MRLevel reflects the severity level of failure.Fluctuation of the MRLevel size with channel frequency domain response amplitude curve
Related, amplitude fluctuation is bigger, and MRLevel value is then bigger, and failure is more serious.Generally according to the size of MRLevel, by the network of CM
State is divided into three ranks, is shown in Table 1 using different monitoring policies for the CM of different severity:
Table 1 defines the network state of three kinds of CM according to the size of MR Level
| MRLevel | Network state | Phenomenon | Monitoring frequency |
| < -25dB (Green Zone) | Health | Network performance is good | It is low |
| - 25~-18dB (yellow area) | Inferior health | Failure does not influence business, user's unaware | In |
| > -18dB (red sector) | Failure | Failure may influence business, customer complaint | It is high |
In this exemplary embodiment, the accident analysis step further include:
It is calculated according to parameter and preset value, foundation derives the corresponding table of parameter and nature of trouble；
Derivative parameter is generated according to hfc plant fault parameter, and in the corresponding table of the derivative parameter and nature of trouble,
The corresponding nature of trouble of abnormal derivative parameter is searched, determines that fault category and fault degree, the fault category include water inlet, pine
Dynamic, short circuit.
In fault location step S130, co-route can be analyzed according to the nature of trouble, complete paired fault is determined
Position.
In this exemplary embodiment, the fault location step further include:
Failure grouping is analyzed the nature of trouble and carried out, the co-route with group failure is analyzed；
According to the distance TDR analysis between fault point with the failure of co-route in group failure, the failure of the failure is determined
The position of point, the positioning of complete paired fault.
In this exemplary embodiment, the pre-equalization coefficients of each CM are monitored, the indexs such as MRLevel and TDR are calculated, point
Analyse the carrying out failure grouping in conjunction with hfc plant topology with interior frequency response curve, the position of guilty culprit can be accurately positioned of each CM
It sets.
The CM influenced by the same failure, MRLevel is relatively high, they similar with interior frequency response curve, it is this can be with
All CM under same CMTS are grouped, each group of CM representative is influenced by different faults, in conjunction with the topology of hfc plant
Structure can find the co-route of same group of CM, then fault point is located in co-route, then can be accurately positioned by TDR
Specific location where fault point.Now by taking hfc plant shown in fig. 5 as an example, illustrate the method and process of fault location, such as Fig. 6
It is shown, it is part CM with interior frequency response figure, wherein CM1, CM2, CM7~CM9 fluctuating range are bigger, illustrate that there are more serious
Distortion, curve can be grouped, it is easy to obtain: CM1, CM2 are similar, for group 1；CM7~CM9 is similar, for group 2.Now in conjunction with net
Network structure analyzes group 1, and CM1 and CM2 are influenced by same failure, so failure is located at the upstream of the two, finds public
Path is total to it is found that failure is in point A or more.But cM3's and CM4 is all relatively flat with interior frequency response curve, then is not affected by this
The influence of failure, it is known that failure between point A and point B, in conjunction with the TDR value that two CM are calculated, can acquire failure in electricity
Specific location in cable.
In this exemplary embodiment, the active Breakdown Maintenance technology of PNM has overturned the traditional O&M mode of operator,
Each CM and other equipment can be considered as to detector, the minor change and failure that monitoring network occurs.PNM technology can not only position
The cable of guilty culprit and the specific location of cable, can also the intensity of type and failure to failure provide accordingly
Quantizating index.
In this exemplary embodiment, since pre-equalization coefficients are compensated to line distortion, other networks are masked
The variation of mass parameter, such as SNR is reduced, FEC error code rises, so the PNM technology based on pre-equalization coefficients can be in other nets
Before network Parameters variation, that is, before failure influence customer service, the fault point in network, positive location and row are found in advance
It removes, reducing failure influences customer service, improves carrier service level, network operation expense is reduced, to reach maximum
Social benefit and economic benefit.
It should be noted that although describing each step of method in the disclosure in the accompanying drawings with particular order,
This does not require that or implies must execute these steps in this particular order, or have to carry out step shown in whole
Just it is able to achieve desired result.Additional or alternative, it is convenient to omit multiple steps are merged into a step and held by certain steps
Row, and/or a step is decomposed into execution of multiple steps etc..
In addition, in this exemplary embodiment, additionally providing a kind of hfc plant accident analysis dress based on CM pre-equalization values
It sets.Referring to shown in Fig. 7, being somebody's turn to do the hfc plant fail analysis device 700 based on CM pre-equalization values may include: parameter collection module
710, failure analysis module 720 and fault location module 730.Wherein:
Parameter collection module 710, in the pre equalizer of the inside for acquiring cable modem (CM), each linear filter
The pre-equalization coefficients of wave device are as the parameter for judging hybrid fiber coax (hfc plant) failure；
Failure analysis module 720, for generating derivative parameter according to hfc plant fault parameter, and in default derivative parameter
In the corresponding table of nature of trouble, the corresponding nature of trouble of abnormal derivative parameter is searched, determines fault category and fault degree；
Fault location module 730, for analyzing co-route, the positioning of complete paired fault according to the nature of trouble.
Among the above respectively the detail of the hfc plant fail analysis device module based on CM pre-equalization values corresponding
It is described in detail in hfc plant failure analysis methods based on CM pre-equalization values, therefore details are not described herein again.
It should be noted that although being referred to the hfc plant accident analysis dress based on CM pre-equalization values in the above detailed description
700 several modules or unit are set, but this division is not enforceable.In fact, according to embodiment of the present disclosure,
Two or more above-described modules or the feature and function of unit can embody in a module or unit.Instead
It, the feature and function of an above-described module or unit can be with further division by multiple modules or unit Lai
It embodies.
In addition, in an exemplary embodiment of the disclosure, additionally providing a kind of electronic equipment that can be realized the above method.
Person of ordinary skill in the field it is understood that various aspects of the invention can be implemented as system, method or
Program product.Therefore, various aspects of the invention can be embodied in the following forms, it may be assumed that complete hardware embodiment, completely
Software implementation (including firmware, microcode etc.) or hardware and software in terms of combine embodiment, may be collectively referred to as here
Circuit, " module " or " system ".
The electronic equipment 300 of this embodiment according to the present invention is described referring to Fig. 8.The electronics that Fig. 8 is shown is set
Standby 300 be only an example, should not function to the embodiment of the present invention and use scope bring any restrictions.
As shown in figure 8, electronic equipment 300 is showed in the form of universal computing device.The component of electronic equipment 300 can wrap
It includes but is not limited to: at least one above-mentioned processing unit 310, at least one above-mentioned storage unit 320, the different system components of connection
The bus 330 of (including storage unit 320 and processing unit 310), display unit 340.
Wherein, the storage unit is stored with program code, and said program code can be held by the processing unit 310
Row, so that various according to the present invention described in the execution of the processing unit 310 above-mentioned " illustrative methods " part of this specification
The step of exemplary embodiment.For example, the processing unit 310 can execute step S110 as shown in fig. 1 to step
S130。
Storage unit 320 may include the readable medium of volatile memory cell form, such as Random Access Storage Unit
(RAM) 3201 and/or cache memory unit 3202, it can further include read-only memory unit (ROM) 3203.
Storage unit 320 can also include program/utility with one group of (at least one) program module 3205
3204, such program module 3205 includes but is not limited to: operating system, one or more application program, other program moulds
It may include the realization of network environment in block and program data, each of these examples or certain combination.
Bus 330 can be to indicate one of a few class bus structures or a variety of, including storage unit bus or storage
Cell controller, peripheral bus, graphics acceleration port, processing unit use any bus structures in a variety of bus structures
Local bus.
Electronic equipment 300 can also be with one or more external equipments 370 (such as keyboard, sensing equipment, bluetooth equipment
Deng) communication, can also be enabled a user to one or more equipment interact with the electronic equipment 300 communicate, and/or with make
Any equipment (such as the router, modulation /demodulation that the electronic equipment 300 can be communicated with one or more of the other calculating equipment
Device etc.) communication.This communication can be carried out by input/output (I/O) interface 350.Also, electronic equipment 300 can be with
By network adapter 360 and one or more network (such as local area network (LAN), wide area network (WAN) and/or public network,
Such as internet) communication.As shown, network adapter 360 is communicated by bus 330 with other modules of electronic equipment 300.
It should be understood that although not shown in the drawings, other hardware and/or software module can not used in conjunction with electronic equipment 300, including but not
Be limited to: microcode, device driver, redundant processing unit, external disk drive array, RAID system, tape drive and
Data backup storage system etc..
By the description of above embodiment, those skilled in the art is it can be readily appreciated that example embodiment described herein
It can also be realized in such a way that software is in conjunction with necessary hardware by software realization.Therefore, implemented according to the disclosure
The technical solution of example can be embodied in the form of software products, which can store in a non-volatile memories
In medium (can be CD-ROM, USB flash disk, mobile hard disk etc.) or on network, including some instructions are so that a calculating equipment (can
To be personal computer, server, terminal installation or network equipment etc.) it executes according to the method for the embodiment of the present disclosure.
In an exemplary embodiment of the disclosure, a kind of computer readable storage medium is additionally provided, energy is stored thereon with
Enough realize the program product of this specification above method.In some possible embodiments, various aspects of the invention can be with
It is embodied as a kind of form of program product comprising program code, it is described when described program product is run on the terminal device
Program code is for executing the terminal device described in above-mentioned " illustrative methods " part of this specification according to the present invention
The step of various exemplary embodiments.
Refering to what is shown in Fig. 9, the program product 400 for realizing the above method of embodiment according to the present invention is described,
It can using portable compact disc read only memory (CD-ROM) and including program code, and can in terminal device, such as
It is run on PC.However, program product of the invention is without being limited thereto, in this document, readable storage medium storing program for executing, which can be, appoints
What include or the tangible medium of storage program that the program can be commanded execution system, device or device use or and its
It is used in combination.
Described program product can be using any combination of one or more readable mediums.Readable medium can be readable letter
Number medium or readable storage medium storing program for executing.Readable storage medium storing program for executing for example can be but be not limited to electricity, magnetic, optical, electromagnetic, infrared ray or
System, device or the device of semiconductor, or any above combination.The more specific example of readable storage medium storing program for executing is (non exhaustive
List) include: electrical connection with one or more conducting wires, portable disc, hard disk, random access memory (RAM), read-only
Memory (ROM), erasable programmable read only memory (EPROM or flash memory), optical fiber, portable compact disc read only memory
(CD-ROM), light storage device, magnetic memory device or above-mentioned any appropriate combination.
Computer-readable signal media may include in a base band or as carrier wave a part propagate data-signal,
In carry readable program code.The data-signal of this propagation can take various forms, including but not limited to electromagnetic signal,
Optical signal or above-mentioned any appropriate combination.Readable signal medium can also be any readable Jie other than readable storage medium storing program for executing
Matter, the readable medium can send, propagate or transmit for by instruction execution system, device or device use or and its
The program of combined use.
The program code for including on readable medium can transmit with any suitable medium, including but not limited to wirelessly, have
Line, optical cable, RF etc. or above-mentioned any appropriate combination.
The program for executing operation of the present invention can be write with any combination of one or more programming languages
Code, described program design language include object oriented program language-Java, C++ etc., further include conventional
Procedural programming language-such as " C " language or similar programming language.Program code can be fully in user
It calculates and executes in equipment, partly executes on a user device, being executed as an independent software package, partially in user's calculating
Upper side point is executed on a remote computing or is executed in remote computing device or server completely.It is being related to far
Journey calculates in the situation of equipment, and remote computing device can pass through the network of any kind, including local area network (LAN) or wide area network
(WAN), it is connected to user calculating equipment, or, it may be connected to external computing device (such as utilize ISP
To be connected by internet).
In addition, above-mentioned attached drawing is only the schematic theory of processing included by method according to an exemplary embodiment of the present invention
It is bright, rather than limit purpose.It can be readily appreciated that the time that above-mentioned processing shown in the drawings did not indicated or limited these processing is suitable
Sequence.In addition, be also easy to understand, these processing, which can be, for example either synchronously or asynchronously to be executed in multiple modules.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the disclosure
His embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Adaptive change follow the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure or
Conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by claim
It points out.
It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by the attached claims.
Claims (9)
1. a kind of hfc plant failure analysis methods based on CM pre-equalization values, which is characterized in that the described method includes:
Parameter acquisition step, acquire cable modem (CM) inside pre equalizer in, each linear filter it is pre-
Coefficient weigh as the parameter for judging hybrid fiber coax (hfc plant) failure；
Accident analysis step generates derivative parameter according to hfc plant fault parameter, and in default derivative parameter and nature of trouble
In corresponding table, the corresponding nature of trouble of abnormal derivative parameter is searched, determines fault category and fault degree；
Fault location step analyzes co-route, the positioning of complete paired fault according to the nature of trouble.
2. the method as described in claim 1, which is characterized in that the parameter acquisition step further include:
CM preequalization is acquired by the ranging message between CM and Cable Modem Terminal System (CMTS) based on Docsis3.0
Coefficient, the CM pre-equalization coefficients ranging period are less than 30s.
3. the method as described in claim 1, which is characterized in that the accident analysis step further includes analyzing the pumping of pre equalizer
Head coefficient:
The pre equalizer includes 24 tap coefficients, and maximum No. 8 tap of amplitude is main tapping, and 1~No. 7 tap is for mending
Tap before the group delay in route is known as is repaid, is mainly used for tap after micro- reflection in compensated line is known as in 9~No. 24 taps；
The tap coefficient is plural number, including real and imaginary parts:
The real part of N number of tap coefficient are as follows: FnR；
The imaginary part of N number of tap coefficient is respectively as follows: FnI.
4. the method as described in claim 1, which is characterized in that the accident analysis step further include:
According to hfc plant fault parameter, derivative parameter is calculated separately, the derivative parameter includes main tapping energy MTNE, preceding pumping
Head energy PreMTE, rear tap energies PostMTE, total tap energies TTE, main tapping compression MTC, non-main tapping and gross energy ratio
NMTER, preceding tap and gross energy ratio PreMTTER, rear tap and gross energy ratio PostMTTER, front and back tap energies ratio PPEsR,
Distance TDR, micro- reflection levels MRLevel between fault point.
5. method as described in claim 1 or 4, which is characterized in that the accident analysis step further include:
It is calculated according to parameter and preset value, foundation derives the corresponding table of parameter and nature of trouble；
Derivative parameter is generated according to hfc plant fault parameter, and in the corresponding table of the derivative parameter and nature of trouble, is searched
The corresponding nature of trouble of abnormal derivative parameter, determines fault category and fault degree, the fault category includes water inlet, loosen,
Short circuit.
6. the method as described in claim 1, which is characterized in that the fault location step further include:
Failure grouping is analyzed the nature of trouble and carried out, the co-route with group failure is analyzed；
According to the distance TDR analysis between fault point with the failure of co-route in group failure, the fault point of the failure is determined
Position, the positioning of complete paired fault.
7. a kind of hfc plant fail analysis device based on CM pre-equalization values, which is characterized in that described device includes:
Parameter collection module, in the pre equalizer of the inside for acquiring cable modem (CM), each linear filter
Pre-equalization coefficients are as the parameter for judging hybrid fiber coax (hfc plant) failure；
Failure analysis module, for generating derivative parameter according to hfc plant fault parameter, and default derivative parameter with it is fault
In the correspondence table of matter, the corresponding nature of trouble of abnormal derivative parameter is searched, determines fault category and fault degree；
Fault location module, for analyzing co-route, the positioning of complete paired fault according to the nature of trouble.
8. a kind of electronic equipment, which is characterized in that including
Processor；And
Memory is stored with computer-readable instruction on the memory, and the computer-readable instruction is held by the processor
Method according to any one of claim 1 to 6 is realized when row.
9. a kind of computer readable storage medium, is stored thereon with computer program, the computer program is executed by processor
Shi Shixian is according to claim 1 to any one of 6 the methods.
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