CN110311728B - Fault checking and processing method, system and storage medium for cable television bidirectional network - Google Patents
Fault checking and processing method, system and storage medium for cable television bidirectional network Download PDFInfo
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- CN110311728B CN110311728B CN201910263183.9A CN201910263183A CN110311728B CN 110311728 B CN110311728 B CN 110311728B CN 201910263183 A CN201910263183 A CN 201910263183A CN 110311728 B CN110311728 B CN 110311728B
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Abstract
The invention provides a fault checking and processing method, a system and a storage medium for a cable television bidirectional network, wherein the method comprises the following steps: acquiring a forward receiving level A of a CM cable modem; and obtaining the reverse emission level of the CM cable modem as B; obtaining a high-low frequency level difference (X-Y) value through the sum of the level of the output end of the last stage of active equipment and the level of the-CM cable modem end; judging whether the calculated high-low frequency level difference (X-Y) is within a preset threshold range of a standard high-low frequency level difference; if not, the connector is prompted to have a fault, and the position of the fault connector is determined according to a prestored line distribution network structure diagram. The problem connector can be quickly and accurately found out through a high-low frequency level difference comparison method, the purpose of quickly finding out network connector faults and cable faults is achieved, maintenance efficiency is improved, convenience is brought to quick finding out of the faults by a front-line maintenance worker, manpower and material resources are saved, and maintenance cost is reduced.
Description
Technical Field
The present application relates to the field of broadband cable television network technology, and in particular, to a method, a system, and a storage medium for processing fault detection of a cable television bidirectional network.
Background
HFC, Hybrid Fiber-Coaxial, i.e., Hybrid Fiber Coaxial network. It is an economical and practical comprehensive digital service broadband network access technology. As shown in fig. 1, HFC usually consists of three parts, i.e. optical fiber trunk line, coaxial cable branch line and user wiring network, where the program signal coming from cable television station is first changed into optical signal to be transmitted on the trunk line; the optical signal is converted into an electrical signal after arriving at a user area, and the electrical signal is distributed by a distributor and then sent to a user through a coaxial cable. It is different from the early CATV coaxial cable network mainly in that optical fiber is used to transmit optical signal on the trunk line, and the front end needs to complete the electric-optical conversion, and the optical-electric conversion is completed after entering the user area.
The traditional cable television network is unidirectional transmission and is downlink broadcast transmission. The existing cable television network is added with a return device, and bidirectional asynchronous transmission can be realized. And because of the high bandwidth advantage of the cable television network, the user bandwidth of more than 10M can be easily achieved, and the cable television network is an economical broadband solution at present. The bidirectional network is a wired network which is composed of a downlink channel and an uplink channel and has a bidirectional interactive transmission function, and is commonly used in communication networks, cable television networks and the like.
In analyzing the fault of the cable television bidirectional network, the ratio of the joint fault is found to be up to 70%, the cable television bidirectional network engineering which has been popular in the industry is the joint engineering, on one hand, the joint of the cable television network is more, and on the other hand, the joint is made to be the key of the prepared cable bidirectional network.
In the prior art, a cable television network causes backward invasion noise exceeding due to joint problems and abnormal transmission level and receiving level of a CM (cable modem), so that the fault phenomena of low network speed and frequent network disconnection reflected by a user side are caused.
Disclosure of Invention
One of the embodiments of the present application provides a method, a system and a storage medium for comparing and processing a level difference of a cable television HFC (hybrid fiber coaxial cable network) network. According to the invention, the problem joint can be quickly and accurately found out through a high-low frequency level difference comparison method, the purpose of quickly finding out the network joint fault and the cable fault is achieved, the maintenance efficiency is accelerated, convenience is provided for a front-line maintenance personnel to quickly find out the fault, manpower and material resources are saved, and the maintenance cost is reduced.
A fault checking and processing method for a cable television bidirectional network comprises the following steps:
s1, pre-storing a threshold range of the standard high and low frequency level difference;
s2, pre-storing a line distribution network structure diagram of the building;
s3, acquiring the forward receiving level of the CM cable modem as A; and obtaining the reverse emission level of the CM cable modem as B;
s4, obtaining a high-low frequency level difference (X-Y) value through a high-low frequency level difference comparison formula, wherein the high-low frequency level difference (X-Y) is the level of the output end of the last stage of active equipment and the sum of (a forward level H + a reverse injection level L) -the sum of the modem end of the CM cable and the sum of (a receiving level A + a transmitting level B);
s5, judging whether the calculated high and low frequency level difference (X-Y) is within a preset threshold range of a standard high and low frequency level difference; if not, the connector is prompted to have a fault, and the position of the fault connector is determined according to a prestored line distribution network structure diagram.
The method for checking and processing the fault of the cable television bidirectional network, wherein the step S5 further includes:
when the high-low frequency level difference (X-Y) <0, judging that the low-frequency attenuation value is too large, and prompting that the connector or the link has an open circuit or weak open circuit phenomenon; reminding to check whether the inner core of the joint is too short or oxidized;
when the high-low frequency level difference (X-Y) >18.4 is judged that the high-frequency attenuation value is overlarge, the short circuit or weak short circuit phenomenon of the connector or the link is prompted, and whether the connector shell is oxidized, whether the outer layer mesh of the cable is oxidized and whether the cable is aged are reminded to be checked.
In the method for processing fault detection of the cable television bidirectional network, the threshold range in step S1 is (0, 20).
The method for checking and processing the fault of the cable television bidirectional network includes, in step S4:
s41, presetting: the sum of the fixed attenuations from the CM cable modem end of the user end to the floor amplifier output port is D: including the sum of the total losses of the branch divider and the fixed attenuator in the link;
setting the loss of a forward downlink cable from a CM (modem) end of a user end to a floor discharge output port to be X and the loss of a reverse uplink cable to be Y; setting the forward receiving level of the CM cable modem to be A and the reverse transmitting level of the CM cable modem to be B;
to obtain: x is H-D-A- (1) formula
Y is B-D-L- (2);
s42, the high and low frequency level difference comparison formula is obtained by the formulas (1) to (2):
X-Y ═ formula (H + L) - (a + B) - - - (3);
that is, the high-low frequency level difference (X-Y) is obtained as the final stage active device output level sum (forward level H + reverse injection level L) -CM cable modem end level sum (reception level a + transmission level B).
The method for checking and processing the fault of the cable television bidirectional network, wherein the step S5 further includes:
when the high-low frequency level difference (X-Y) value is within the preset threshold range of the standard high-low frequency level difference, the joints and cables passing from the CM cable modem to the building are judged to be normal, and fault-free prompt is carried out;
for cable modems having high and low frequency level difference (X-Y) values that are not within a pre-set standard high and low frequency level difference threshold, it is advisable to only check their individual connectors and line sections.
A system for troubleshooting a cable television bi-directional network, comprising: a processor, a memory, and a communication bus;
the storage is stored with a fault check processing program of the cable television bidirectional network which can be executed by the processor;
the communication bus realizes connection communication between the processor and the memory;
the processor implements the following steps when executing the fault checking and processing program of the cable television bidirectional network:
s1, pre-storing a threshold range of the standard high and low frequency level difference;
s2, pre-storing a line distribution network structure diagram of the building;
s3, acquiring the forward receiving level of the CM cable modem as A; and obtaining the reverse emission level of the CM cable modem as B;
s4, obtaining a high-low frequency level difference (X-Y) value through a high-low frequency level difference comparison formula, wherein the high-low frequency level difference (X-Y) is the level of the output end of the last stage of active equipment and the sum of (a forward level H + a reverse injection level L) -the sum of the modem end of the CM cable and the sum of (a receiving level A + a transmitting level B);
s5, judging whether the calculated high and low frequency level difference (X-Y) is within a preset threshold range of a standard high and low frequency level difference; if not, the connector is prompted to have a fault, and the position of the fault connector is determined according to a prestored line distribution network structure diagram.
The system for processing fault detection of the cable television bidirectional network comprises a processor, a fault detection processing program and a fault detection processing program, wherein the processor executes the fault detection processing program of the cable television bidirectional network and further comprises the following steps:
when the high-low frequency level difference (X-Y) <0, judging that the low-frequency attenuation value is too large, and prompting that the connector or the link has an open circuit or weak open circuit phenomenon; reminding to check whether the inner core of the joint is too short or oxidized;
when the high-low frequency level difference (X-Y) >18.4 is judged that the high-frequency attenuation value is overlarge, the short circuit or weak short circuit phenomenon of the connector or the link is prompted, and whether the connector shell is oxidized, whether the outer layer mesh of the cable is oxidized and whether the cable is aged are reminded to be checked.
The system for processing fault detection of the cable television bidirectional network comprises a processor, a fault detection processing program and a fault detection processing program, wherein the processor executes the fault detection processing program of the cable television bidirectional network and further comprises the following steps:
the threshold range in the step S1 is (0, 20);
s41, presetting: the sum of the fixed attenuations from the CM cable modem end of the user end to the floor amplifier output port is D: including the sum of the total losses of the branch divider and the fixed attenuator in the link;
setting the loss of a forward downlink cable from a CM (modem) end of a user end to a floor discharge output port to be X and the loss of a reverse uplink cable to be Y; setting the forward receiving level of the CM cable modem to be A and the reverse transmitting level of the CM cable modem to be B;
to obtain: x is H-D-A- (1) formula
Y is B-D-L- (2);
s42, the high and low frequency level difference comparison formula is obtained by the formulas (1) to (2):
X-Y ═ formula (H + L) - (a + B) - - - (3);
that is, the high-low frequency level difference (X-Y) is obtained as the final stage active device output level sum (forward level H + reverse injection level L) -CM cable modem end level sum (reception level a + transmission level B).
The system for processing fault detection of the cable television bidirectional network comprises a processor, a fault detection processing program and a fault detection processing program, wherein the processor executes the fault detection processing program of the cable television bidirectional network and further comprises the following steps:
when the high-low frequency level difference (X-Y) value is within the preset threshold range of the standard high-low frequency level difference, the joints and cables passing from the CM cable modem to the building are judged to be normal, and fault-free prompt is carried out;
for cable modems having high and low frequency level difference (X-Y) values that are not within a pre-set standard high and low frequency level difference threshold, it is advisable to only check their individual connectors and line sections.
A storage medium having stored thereon computer instructions which, when executed, implement any of the cable television bi-directional network troubleshooting processing methods.
According to the fault checking and processing method, the system and the storage medium of the cable television bidirectional network, the problem joint can be quickly and accurately found out through the high-low frequency level difference comparison method, the purpose of quickly finding out the network joint fault and the cable fault is achieved, the maintenance efficiency is improved, convenience is provided for a first-line maintenance worker to quickly find out the fault, manpower and material resources are saved, and the maintenance cost is reduced.
Drawings
The present application will be further explained by way of exemplary embodiments, which will be described in detail by way of the accompanying drawings. These embodiments are not intended to be limiting, and in these embodiments like numerals are used to indicate like structures, wherein:
figure 1 is a schematic diagram of a typical architecture of an HFC access network.
Fig. 2 is a schematic diagram of a data communication system architecture for HFCs.
Fig. 3 is a flowchart of an embodiment of a fault checking processing method for a cable tv bi-directional network according to the present invention.
Fig. 4 is a block diagram of a reasonable high and low frequency level difference (X-Y) value versus CM (cable modem) level.
Figure 5 is a table of CM data derived from a CMTS operation monitoring integrated network management system in an experimental area according to an embodiment of the present invention.
Fig. 6 shows a distribution network structure of a certain experimental area in the embodiment of the method of the present invention.
FIG. 7 is a functional block diagram of a preferred embodiment of a troubleshooting system for a cable TV bi-directional network of the present invention.
Detailed Description
In order to make the objects, technical solutions, and advantages of the present application more clearly understood, the following further describes the present application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
On the contrary, this application is intended to cover any alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the application as defined by the appended claims. Furthermore, in the following detailed description of the present application, certain specific details are set forth in order to provide a better understanding of the present application. It will be apparent to one skilled in the art that the present application may be practiced without these specific details.
As shown in fig. 1 and 2, fig. 1 is a schematic diagram of a typical structure of an HFC access network. Fig. 2 is a schematic diagram of a data communication system architecture for HFCs. The CMTS (small C Cable Modem terminal system) is a termination system of Cable Modem, adopts interfaces of 10 BASE-T, 100 BASE-T and the like to be connected with external equipment through a switching HUB, and is connected with the Internet through a router or can be directly connected to a local server. Cable modems (Cable modems) are an important component of HFC data communication systems, allowing one to achieve access speeds hundreds of times higher than telephone modems. CM (Cable Modem) is a customer premise equipment, which is placed in the customer's home and connected with the customer's computer through a 10 BASE-T interface.
After a Cable Modem (Cable Modem) is added in a Cable television (CATV) network, signal access except for video service can be realized, and high-speed data service and telephone service can be provided. A Cable Modem (Cable Modem) is required to be capable of not only bidirectional transmission but also an increase in transmission capacity.
As shown in fig. 3, a method for checking and processing a fault of a cable television bidirectional network according to an embodiment of the present invention includes the following steps:
s100, pre-storing a threshold range of standard high and low frequency level difference; wherein the threshold range in step S100 is (0, 20).
And S200, storing a line distribution network structure diagram of the building in advance.
S300, acquiring a forward receiving level A of the CM cable modem; and obtaining a CM cable modem reverse emission level of B.
And S400, obtaining a high-low frequency level difference (X-Y) value through a high-low frequency level difference comparison formula, wherein the high-low frequency level difference (X-Y) is the level of the output end of the last stage of active equipment and the (forward level H + reverse injection level L) -the level of the modem end of the CM cable and the (receiving level A + transmitting level B).
Wherein, the step S400 specifically includes:
s41, presetting: the sum of the fixed attenuations from the CM cable modem end of the user end to the floor amplifier output port is D: including the sum of the total losses of the branch divider and the fixed attenuator in the link;
setting the loss of a forward downlink cable from a CM (modem) end of a user end to a floor discharge output port to be X and the loss of a reverse uplink cable to be Y; setting the forward receiving level of the CM cable modem to be A and the reverse transmitting level of the CM cable modem to be B;
to obtain: x is H-D-A- (1) formula
Y is B-D-L- (2);
s42, the high and low frequency level difference comparison formula is obtained by the formulas (1) to (2):
X-Y ═ formula (H + L) - (a + B) - - - (3);
that is, the high-low frequency level difference (X-Y) is obtained as the final stage active device output level sum (forward level H + reverse injection level L) -CM cable modem end level sum (reception level a + transmission level B).
S500, judging whether the calculated high-low frequency level difference (X-Y) is within a preset threshold range of a standard high-low frequency level difference; if not, the connector is prompted to have a fault, and the position of the fault connector is determined according to a prestored line distribution network structure diagram.
Wherein, the step S500 further includes:
when the high-low frequency level difference (X-Y) <0, judging that the low-frequency attenuation value is too large, and prompting that the connector or the link has an open circuit or weak open circuit phenomenon; reminding to check whether the inner core of the joint is too short or oxidized;
when the high-low frequency level difference (X-Y) >18.4 is judged that the high-frequency attenuation value is overlarge, the short circuit or weak short circuit phenomenon of the connector or the link is prompted, and whether the connector shell is oxidized, whether the outer layer mesh of the cable is oxidized and whether the cable is aged are reminded to be checked.
Wherein, the step S500 further includes:
when the high-low frequency level difference (X-Y) value is within the preset threshold range of the standard high-low frequency level difference, the joints and cables passing from the CM cable modem to the building are judged to be normal, and fault-free prompt is carried out;
for cable modems having high and low frequency level difference (X-Y) values that are not within a pre-set standard high and low frequency level difference threshold, it is advisable to only check their individual connectors and line sections.
Specifically, the reverse debug of cable tv bi-directional network adopts the "0 dB" gain principle, that is, the gain from the building amplifier to the CMTS (cable modem termination system) reverse port is "0 dB", and for example, the current network conditions in a certain area, in order to achieve the "0 dB" gain requirement, it is specified that the reverse signal level injected at the building amplifier output terminal is 16dBmv (L is set here in view of the low frequency band).
Cable Modems (CMs) are customer premises equipment that provide bi-directional IP data transmission over hybrid fiber/coaxial (HFC) networks. To ensure that a CM (cable modem) receives a valid downstream level (e.g., a region has a cable broadband downstream frequency point placed in a high band around 650 MHZ), a region has a forward output level of 650MHZ, which is required to be 37dBmv (H in view of the high band).
The 'amplifier' in the embodiment of the invention refers to a building amplifier (an amplifier in fig. 1), a full-scale building radio frequency signal amplifier, also called an extension amplifier, called an adaptive amplifier or L innovative amplifier in English, which is the last stage amplifier of television cable transmission, and is followed by a passive distribution network, namely a household branch distributor or a household amplifier or a line amplifier, etc. the function of the amplifier is to output high level to drive the passive network, so that a user can obtain enough signal level
Assuming that the sum of the fixed attenuation from the CM (cable modem) end of a certain user end to the output port of the building amplifier is D (including the sum of the total loss of the branch distributor and the fixed attenuator in the link), the forward downlink cable loss from the CM (cable modem) end of the user end to the output port of the building amplifier is X, the reverse uplink cable loss is Y, the forward receiving level of the CM (cable modem) is a, and the reverse transmitting level of the CM (cable modem) is B, the following two equations are derived.
X is H-D-A- (1).
Y is B-D-L- (2).
That is, the equation (1) is that the forward downstream cable loss X from the CM (cable modem) end of the user end to the output port of the building amplifier is the forward level H-the fixed attenuation sum D from the cable modem end to the output port of the building amplifier-the forward reception level a of the cable modem.
That is, the equation (2) is that the reverse upstream cable loss Y from the CM (cable modem) end of the subscriber end to the output port of the building amplifier is equal to the reverse transmission level of the cable modem B-the fixed attenuation sum D-reverse injection level L from the cable modem end to the output port of the building amplifier.
Wherein the formula (1) to (2) gives the formula (3) in which X-Y ═ H + L) - (A + B) - - - (D) is not fixed.
A high-low frequency level difference comparison method is deduced through a CMTS-CM technology, namely on the premise that the design of a cable television bidirectional distribution network is relatively reasonable, if the active equipment debugging is standardized, the high-low frequency level difference (X-Y) is summarized as (1) the output level of the last stage of active equipment and (forward level H + reverse injection level L) -CM (cable modem) level sum (receiving level A + transmitting level B).
Since (X-Y) is a high-frequency line loss and a low-frequency line loss, X-Y > 0.
The total length of the cable from a CM (cable modem) end of a user end to a floor discharge outlet is set to be Z (meter), although the floor cable used by many distribution network designs is different from the type of the house cable, for the convenience of calculation, the house cable with the largest loss is taken as a calculation unit (actually, the floor cable occupies a small amount of the total length Z and the loss also occupies a small ratio).
Taking an existing cable-to-home cable F6 type in a certain area as an example, the attenuation value is 0.047 dB/m at a low frequency point 50MHZ and 0.1705 dB/m at a high frequency point 640MHZ, and the following results are obtained:
and X is 0.1705Z Y is 0.047Z- (4).
If the nominal reverse emission level B of CM (cable modem) is obtained after the fixed attenuation D value is set to be constant, the following equations (1), (2) and (4) are used:
X-Y is 0.1705 × (B-D-L) ÷ 0.047- (B-D-L) - - - (5).
Z is (B-D-L) ÷ 0.047- - - (6).
A ═ H-D-0.1705 × (B-D-L) ÷ 0.047- - - (7) formula.
According to the above equations (5), (6) and (7), substituting H to 37 and L to 16, the data (shown in fig. 4) corresponding to different fixed attenuation D values in the rated range (30dBmv-55dBmv) of the CM (cable modem) transmission level B is obtained, and the shadow part is the reasonable standard reaching interval only by combining the rated range (-10dBmv-15dBmv) of the CM reception level a.
Fig. 4 is a block diagram of a reasonable high and low frequency level difference (X-Y) value versus CM (cable modem) level.
From the above, it can be seen that: on the premise that the design of the cable television bidirectional distribution network is relatively reasonable, the normal range of the high-low frequency level difference X-Y is obtained as long as the building amplifier debugging is standardized (such as the building amplifier debugging standard of the Guangdong cable, wherein the level requirement of the high frequency 650MHZ of the forward output level of the building amplifier is 37dBmv, and the level of the reverse signal injected into the output end is 16dBmv), taking the current distribution network debugging standard of the Guangdong cable as an example: X-Y is (0, 18.4), (in practice, may be (0, 20) - - (8).
In the embodiment of the invention, the X-Y value of the high and low frequency level difference is analyzed: 1. when X-Y is less than 0, the low-frequency attenuation value is too large, which indicates that the connector (or the link) has an open circuit or weak open circuit phenomenon (mainly embodied in that the inner core of the connector is too short or oxidized); 2. when the X-Y is greater than 18.4, the high-frequency attenuation value is too large, which indicates that the connector (or the link) has a short circuit or weak short circuit phenomenon (mainly embodied in the oxidation of a connector shell, the oxidation of a cable outer layer mesh, the aging of the cable and the like).
The invention is described in further detail below by means of specific application examples:
the example analysis of the active operation and maintenance implemented in the "high and low frequency level difference comparison" mode is as follows:
setting up two ladder ports CM (cable modem) condition of wired certain building in certain area, according to "CMTS operation monitoring integrated network management system" can derive forward receiving level (A value) and backward transmitting level (B value) of CM carried by distribution network under every optical node (small C), and can calculate "X-Y value" (the identification gray bottom portion in the following table is user CM with network fault)
| The address of the user | CM reception level | CM emissionLevel of electricity | Value of X-Y |
| Aromatic elegant garden No. 12 105 house | 7.7 | 43.9 | 1.4 |
| Aromatic elegant garden No. 12 208 |
8 | 48.3 | -3.3 |
| Aromatic elegant garden No. 12 302 house | 11.1 | 43.9 | -2 |
| Aromatic elegant garden No. 12 401 house | 6.3 | 49 | -2.3 |
| Aromatic elegant garden No. 12 408 house | 4.4 | 46 | 2.6 |
| Aromatic elegant garden No. 12 501 house | 8.9 | 47 | -2.9 |
| Aromatic elegant garden No. 12 602 house | 10.8 | 44.9 | -2.7 |
| Aromatic elegant garden No. 12 702 house | 4.6 | 38.5 | 9.9 |
| Arganian 12 # 705 house | 11.1 | 43.9 | -2 |
| Arganian 12 # 708 house | 9.1 | 54 | -10.1 |
| Arya garden No. 12 908 |
6 | 52.5 | -5.5 |
Fig. 5 is a CM data table derived from the CMTS operation monitoring integrated network management system according to an embodiment of the present invention. Network maintenance personnel know the distribution network structure through going to the door (or call out a relevant distribution network drawing in advance), and for a CM with a normal (X-Y) value, the connectors and cables passing through the CM to the building can be judged to be normal (as shown in the line of a blue part 2772 marked in the figure 6), so that for a CM with an abnormal (X-Y) value, only the unique connectors and line parts of the CM are checked (as shown in the red part marked in the figure 6, and as shown in the figure 6, a distribution network drawing for a certain building is laid in the figure 6).
For a distribution network with a large number of CM, the (X-Y) values of a plurality of CM are often influenced by the fault of only one public joint, and maintenance personnel can quickly find out fault points by simple analysis and judgment through the high-low frequency level difference comparison method of the embodiment of the invention, thereby greatly saving operation and maintenance time.
In order to fully verify the 'high-low frequency level difference comparison method' of the embodiment of the invention, sampling practice of nearly 5000-user CM (cable modem) is carried out, all CM which do not conform to the range of 'X-Y ═ 0, 18.4', the existence of connector faults or cable faults is verified, and most of the CM occur in a user indoor network, meanwhile, the mode is really beneficial to quickly searching the common connector faults, the number of harmful connectors existing in the wired network CM of a certain experimental area is up to 3 thousands, which accounts for 8% of users of the network CM, and the users not only cause reverse channel noise, but also are potential high-risk lost users.
The invention adopts a high-low frequency level difference comparison method, namely, on the premise of relatively reasonable design of a cable television bidirectional distribution network, as long as the active equipment debugging is ensured to be standardized, the high-low frequency level difference (X-Y) is obtained as the output level of the last stage of active equipment, the (forward level H + reverse injection level L) -CM end level and (receiving level A + transmitting level B), and (2) the normal range of the high-low frequency level difference is X-Y (0, 18.4).
1. The application effect is as follows: in the embodiment of the invention, an operation and maintenance part in a television network of an experimental test area is written into a CMTS operation monitoring integrated network management system as a monitoring item, and the condition that x-y of a local wired network CM is less than about 3 ten thousand households accounting for 8% of scalar is monitored. And 3 demonstration cells of the experimental test area are all provided with nearly 3600 gateways by adopting the mode of the high-low frequency level difference comparison method of the embodiment of the invention, so that the high bandwidth experience is good, the complaint amount of users to the network speed can be effectively reduced, and the satisfaction degree of the users is improved.
By the high-low frequency level difference comparison method, the overall quality of each network channel can be improved, and the quality leap of the whole network channel is realized.
As shown in fig. 2, based on the above fault checking and processing method for the cable television bidirectional network, the present invention also provides a fault checking and processing system for the cable television bidirectional network, where the fault checking and processing system for the cable television bidirectional network may be a computing device such as a server. The system for checking and processing the fault of the cable television bidirectional network comprises a processor 10, a memory 20 and a display screen 30, wherein the processor 10 is connected with the memory 20 through a communication bus 50, and the display screen 30 is connected with the processor 10 through the communication bus 50. Fig. 7 shows only some of the components of the troubleshooting processing system of the cable television bi-directional network, but it should be understood that not all of the shown components are required to be implemented, and that more or fewer components may be implemented instead.
The memory 20 may be, in some embodiments, an internal storage unit of the troubleshooting processing system of the cable television bi-directional network, such as a memory of the troubleshooting processing system of the cable television bi-directional network. The memory 20 may also be an external storage device of the troubleshooting system server of the cable tv bi-directional network in other embodiments, such as a plug-in usb disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, provided on the server. Further, the memory 20 may also include both an internal storage unit of the server and an external storage device. The memory 20 is used for storing application software installed in the troubleshooting processing system of the cable tv bi-directional network and various data, such as installed program codes. The memory 20 may also be used to temporarily store data that has been output or is to be output. In an embodiment, the memory 20 stores a program 40 of a fault checking processing method for a cable tv bidirectional network, and the program 40 of the fault checking processing method for the cable tv bidirectional network can be executed by the processor 10, so as to implement the fault checking processing method for the cable tv bidirectional network in the present application. And displays the corresponding processing result through the display screen 30.
In one embodiment, when the processor 10 executes the program 40 of the method for handling troubleshooting of a cable tv bi-directional network in the memory 20, the following steps are implemented:
s1, pre-storing a threshold range of the standard high and low frequency level difference;
s2, pre-storing a line distribution network structure diagram of the building;
s3, acquiring the forward receiving level of the CM cable modem as A; and obtaining the reverse emission level of the CM cable modem as B;
s4, obtaining a high-low frequency level difference (X-Y) value through a high-low frequency level difference comparison formula, wherein the high-low frequency level difference (X-Y) is the level of the output end of the last stage of active equipment and the sum of (a forward level H + a reverse injection level L) -the sum of the modem end of the CM cable and the sum of (a receiving level A + a transmitting level B);
s5, judging whether the calculated high and low frequency level difference (X-Y) is within a preset threshold range of a standard high and low frequency level difference; if not, the connector is prompted to have a fault, and the position of the fault connector is determined according to a prestored line distribution network structure diagram.
Wherein, the processor further implements the following steps when executing the fault checking and processing program of the cable television bidirectional network:
when the high-low frequency level difference (X-Y) <0, judging that the low-frequency attenuation value is too large, and prompting that the connector or the link has an open circuit or weak open circuit phenomenon; reminding to check whether the inner core of the joint is too short or oxidized;
when the high-low frequency level difference (X-Y) >18.4 is judged that the high-frequency attenuation value is overlarge, the short circuit or weak short circuit phenomenon of the connector or the link is prompted, and whether the connector shell is oxidized, whether the outer layer mesh of the cable is oxidized and whether the cable is aged are reminded to be checked.
Wherein, the processor further implements the following steps when executing the fault checking and processing program of the cable television bidirectional network:
the threshold range in the step S1 is (0, 20);
s41, presetting: the sum of the fixed attenuations from the CM cable modem end of the user end to the floor amplifier output port is D: including the sum of the total losses of the branch divider and the fixed attenuator in the link;
setting the loss of a forward downlink cable from a CM (modem) end of a user end to a floor discharge output port to be X and the loss of a reverse uplink cable to be Y; setting the forward receiving level of the CM cable modem to be A and the reverse transmitting level of the CM cable modem to be B;
to obtain: x is H-D-A- (1) formula
Y is B-D-L- (2);
s42, the high and low frequency level difference comparison formula is obtained by the formulas (1) to (2):
X-Y ═ formula (H + L) - (a + B) - - - (3);
that is, the high-low frequency level difference (X-Y) is obtained as the final stage active device output level sum (forward level H + reverse injection level L) -CM cable modem end level sum (reception level a + transmission level B).
Wherein, the processor further implements the following steps when executing the fault checking and processing program of the cable television bidirectional network:
when the high-low frequency level difference (X-Y) value is within the preset threshold range of the standard high-low frequency level difference, the joints and cables passing from the CM cable modem to the building are judged to be normal, and fault-free prompt is carried out;
for cable modems having high and low frequency level difference (X-Y) values that are not within the pre-set threshold range of standard high and low frequency level differences, it is advisable to only check their individual connectors and line sections, as described above.
Based on the foregoing embodiments, the present invention further provides a storage medium, where the storage medium stores computer instructions, and when the computer instructions are executed, the method for processing fault detection of a cable television bidirectional network is implemented, which is specifically described above.
In summary, the fault checking and processing method, system and storage medium for the cable television bidirectional network provided by the invention can quickly and accurately find out the problem connector by using the high-low frequency level difference comparison method, so as to achieve the purpose of quickly finding out the network connector fault and the cable fault, accelerate the maintenance efficiency, provide convenience for a first-line maintenance personnel to quickly find out the fault, save manpower and material resources and reduce the maintenance cost.
The method, system and storage medium for processing fault detection of cable television bidirectional network disclosed in the present application may bring beneficial effects including but not limited to: the above effects. It is to be noted that different embodiments may produce different advantages, and in different embodiments, any one or combination of the above advantages may be produced, or any other advantages may be obtained.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A fault checking and processing method for a cable television bidirectional network is characterized by comprising the following steps:
s1, pre-storing a threshold range of the standard high and low frequency level difference;
s2, pre-storing a line distribution network structure diagram of the building;
s3, acquiring the forward receiving level of the CM cable modem as A; and obtaining the reverse emission level of the CM cable modem as B;
s4, obtaining a high-low frequency level difference (X-Y) value through a high-low frequency level difference comparison formula, wherein the high-low frequency level difference (X-Y) is the level of the output end of the last stage of active equipment and the sum of (a forward level H + a reverse injection level L) -the sum of the modem end of the CM cable and the sum of (a receiving level A + a transmitting level B);
s5, judging whether the calculated high and low frequency level difference (X-Y) is within a preset threshold range of a standard high and low frequency level difference; if not, prompting that the joint has a fault, and determining the position of the fault joint according to a prestored line distribution network structure diagram;
wherein, the forward down cable loss from the CM cable modem end of the user end to the floor discharge output port is X, and the reverse up cable loss is Y.
2. The cable television bi-directional network fault checking processing method of claim 1, wherein said step S5 further comprises:
when the high-low frequency level difference (X-Y) <0, judging that the low-frequency attenuation value is too large, and prompting that the connector or the link has an open circuit or weak open circuit phenomenon; reminding to check whether the inner core of the joint is too short or oxidized;
when the high-low frequency level difference (X-Y) >18.4 is judged that the high-frequency attenuation value is overlarge, the short circuit or weak short circuit phenomenon of the connector or the link is prompted, and whether the connector shell is oxidized, whether the outer layer mesh of the cable is oxidized and whether the cable is aged are reminded to be checked.
3. The cable television bi-directional network fault checking processing method according to claim 1, wherein the threshold range in the step S1 is (0, 20).
4. The method for processing fault detection in a cable bi-directional network as claimed in claim 1, wherein said step S4 specifically comprises:
s41, presetting: the sum of the fixed attenuations from the CM cable modem end of the user end to the floor amplifier output port is D: including the sum of the total losses of the branch divider and the fixed attenuator in the link;
setting the loss of a forward downlink cable from a CM (modem) end of a user end to a floor discharge output port to be X and the loss of a reverse uplink cable to be Y; setting the forward receiving level of the CM cable modem to be A and the reverse transmitting level of the CM cable modem to be B;
to obtain: x is H-D-A- (1) formula
Y is B-D-L- (2);
s42, the high and low frequency level difference comparison formula is obtained by the formulas (1) to (2):
X-Y ═ formula (H + L) - (a + B) - - - (3);
that is, the high-low frequency level difference (X-Y) is obtained as the final stage active device output level sum (forward level H + reverse injection level L) -CM cable modem end level sum (reception level a + transmission level B).
5. The cable television bi-directional network fault checking processing method of claim 1, wherein said step S5 further comprises:
when the high-low frequency level difference (X-Y) value is within the preset threshold range of the standard high-low frequency level difference, the joints and cables passing from the CM cable modem to the building are judged to be normal, and fault-free prompt is carried out;
for cable modems having high and low frequency level difference (X-Y) values that are not within a pre-set standard high and low frequency level difference threshold, it is advisable to only check their individual connectors and line sections.
6. A system for troubleshooting a cable television bi-directional network, comprising: a processor, a memory, and a communication bus;
the storage is stored with a fault check processing program of the cable television bidirectional network which can be executed by the processor;
the communication bus realizes connection communication between the processor and the memory;
the processor implements the following steps when executing the fault checking and processing program of the cable television bidirectional network:
s1, pre-storing a threshold range of the standard high and low frequency level difference;
s2, pre-storing a line distribution network structure diagram of the building;
s3, acquiring the forward receiving level of the CM cable modem as A; and obtaining the reverse emission level of the CM cable modem as B;
s4, obtaining a high-low frequency level difference (X-Y) value through a high-low frequency level difference comparison formula, wherein the high-low frequency level difference (X-Y) is the level of the output end of the last stage of active equipment and the sum of (a forward level H + a reverse injection level L) -the sum of the modem end of the CM cable and the sum of (a receiving level A + a transmitting level B);
s5, judging whether the calculated high and low frequency level difference (X-Y) is within a preset threshold range of a standard high and low frequency level difference; if not, prompting that the joint has a fault, and determining the position of the fault joint according to a prestored line distribution network structure diagram;
wherein, the forward down cable loss from the CM cable modem end of the user end to the floor discharge output port is X, and the reverse up cable loss is Y.
7. The system of claim 6, wherein the processor, when executing the program for handling fault detection in a cable bidirectional network, further performs the steps of:
when the high-low frequency level difference (X-Y) <0, judging that the low-frequency attenuation value is too large, and prompting that the connector or the link has an open circuit or weak open circuit phenomenon; reminding to check whether the inner core of the joint is too short or oxidized;
when the high-low frequency level difference (X-Y) >18.4 is judged that the high-frequency attenuation value is overlarge, the short circuit or weak short circuit phenomenon of the connector or the link is prompted, and whether the connector shell is oxidized, whether the outer layer mesh of the cable is oxidized and whether the cable is aged are reminded to be checked.
8. The system of claim 6, wherein the processor, when executing the program for handling fault detection in a cable bidirectional network, further performs the steps of:
the threshold range in the step S1 is (0, 20);
s41, presetting: the sum of the fixed attenuations from the CM cable modem end of the user end to the floor amplifier output port is D: including the sum of the total losses of the branch divider and the fixed attenuator in the link;
setting the loss of a forward downlink cable from a CM (modem) end of a user end to a floor discharge output port to be X and the loss of a reverse uplink cable to be Y; setting the forward receiving level of the CM cable modem to be A and the reverse transmitting level of the CM cable modem to be B;
to obtain: x is H-D-A- (1) formula
Y is B-D-L- (2);
s42, the high and low frequency level difference comparison formula is obtained by the formulas (1) to (2):
X-Y ═ formula (H + L) - (a + B) - - - (3);
that is, the high-low frequency level difference (X-Y) is obtained as the final stage active device output level sum (forward level H + reverse injection level L) -CM cable modem end level sum (reception level a + transmission level B).
9. The system of claim 6, wherein the processor, when executing the program for handling fault detection in a cable bidirectional network, further performs the steps of:
when the high-low frequency level difference (X-Y) value is within the preset threshold range of the standard high-low frequency level difference, the joints and cables passing from the CM cable modem to the building are judged to be normal, and fault-free prompt is carried out;
for cable modems having high and low frequency level difference (X-Y) values that are not within a pre-set standard high and low frequency level difference threshold, it is advisable to only check their individual connectors and line sections.
10. A storage medium storing computer instructions which, when executed, implement a method of troubleshooting processing for a cable bi-directional network of any one of claims 1-5.
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| CN1735218A (en) * | 2004-08-11 | 2006-02-15 | 深圳市劲成宽频技术有限公司 | Signal test analysis system for CATV optical fibre coaxial cable mixing network |
| JP2013131981A (en) * | 2011-12-22 | 2013-07-04 | Technology Networks Inc | Cable television network monitoring system, cable television network monitoring method and program |
| CN107852343A (en) * | 2015-11-06 | 2018-03-27 | 华为技术有限公司 | A kind of method and device, the system of hfc plant fault location |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1735218A (en) * | 2004-08-11 | 2006-02-15 | 深圳市劲成宽频技术有限公司 | Signal test analysis system for CATV optical fibre coaxial cable mixing network |
| JP2013131981A (en) * | 2011-12-22 | 2013-07-04 | Technology Networks Inc | Cable television network monitoring system, cable television network monitoring method and program |
| CN107852343A (en) * | 2015-11-06 | 2018-03-27 | 华为技术有限公司 | A kind of method and device, the system of hfc plant fault location |
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