CN106878577A - Cable modem is reached the standard grade control method and device - Google Patents
Cable modem is reached the standard grade control method and device Download PDFInfo
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- CN106878577A CN106878577A CN201611188385.4A CN201611188385A CN106878577A CN 106878577 A CN106878577 A CN 106878577A CN 201611188385 A CN201611188385 A CN 201611188385A CN 106878577 A CN106878577 A CN 106878577A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
- H04B3/48—Testing attenuation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
Abstract
Reached the standard grade control method and device the present invention relates to a kind of cable modem, including：During cable modem is reached the standard grade, downlink radio-frequency signal is received；When judging that the signal to noise ratio of the downlink radio-frequency signal is unsatisfactory for the first sets requirement, consult to improve the launching electrical level of the Cable Modem Terminal System with Cable Modem Terminal System.After the launching electrical level of the Cable Modem Terminal System is improved, just can accordingly improve the level of cable modem reception, so as to improve a success rate for the cable modem normal demodulation of the docking collection of letters number, the reliability that cable modem is successfully reached the standard grade is improved.
Description
Technical field
The present invention relates to communication technical field, line control method and dress on more particularly to a kind of cable modem
Put.
Background technology
CM, English name Cable Modem, it is in recent years with net
The expansion of network application and grow up, be mainly used in cable television network and carry out data transmission.It modulates skill using high-efficiency digital
Art and digital compression technology, greatly increase the channel capacity of cable television system, without carrying out larger journey to system
The renewal of degree, therefore cable television system also has in addition to it can provide more, more rich, better quality TV programme
Enough band resources provide other various non-broadcasting services, and cable television system starts to interactive two-way, integrated service
Direction is developed, from arrowband to broadband transition.
In DOCSIS3.0 (data over cable service interface specification 3.0) standard, the descending tune of cable modem
Mode processed is generally using 256QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation) and two kinds of 64QAM
Mode, 256QAM and 64QAM carrying I/Q signal of both modulation systems (sine wave analog signal) compare many, it is necessary to relatively higher
Signal to noise ratio could obtain preferable signal quality, also could receiving end receive, once transmitting procedure standard coaxial cable it is long with
It is larger as decaying, along with noise jamming it is also big if, the Signal-to-Noise that will receive receiving terminal is relatively low so that
Receiving terminal cannot normal demodulated signal so that reducing the probability that cable modem is successfully reached the standard grade.
The content of the invention
Based on this, it is necessary to for how to improve the problem of the reliability that cable modem is successfully reached the standard grade, carry
Reached the standard grade control method and device for a kind of cable modem.
A kind of line control method on cable modem, methods described includes：
During cable modem is reached the standard grade, downlink radio-frequency signal is received；
When judging that the signal to noise ratio of the downlink radio-frequency signal is unsatisfactory for the first sets requirement, with cable modem termination
System consults to improve the launching electrical level of the Cable Modem Terminal System.
Wherein in one embodiment, when judging that the signal to noise ratio of the downlink radio-frequency signal is unsatisfactory for the first sets requirement,
Consult the step of improving the launching electrical level of the Cable Modem Terminal System with Cable Modem Terminal System to wrap
Include：
When judging that the signal to noise ratio of the downlink radio-frequency signal is unsatisfactory for the first sets requirement, with cable modem termination
System consults to judge whether the current launching electrical level of the Cable Modem Terminal System reaches max-thresholds, if so, then
Corticofugal Modulation of Somatosensory is carried out less than the modulation system of current downlink modulation system using transmission rate；Otherwise, the cable modulation is improved
The launching electrical level of demodulator terminal system.
Wherein in one embodiment, during cable modem is reached the standard grade, receive downlink radio-frequency signal the step of
Including：
Receive the synchronizing signal from Cable Modem Terminal System.
Wherein in one embodiment, when judging that the signal to noise ratio of the downlink radio-frequency signal is unsatisfactory for the first sets requirement,
Consult the step of improving the launching electrical level of the Cable Modem Terminal System with Cable Modem Terminal System to wrap
Include：
Judge whether the signal to noise ratio of the synchronizing signal meets the first sets requirement, if so, performing upper line process other
Step；Otherwise, consult to improve the transmitting electricity of the Cable Modem Terminal System with Cable Modem Terminal System
It is flat, and until the signal to noise ratio of the synchronizing signal meets first sets requirement.
Wherein in one embodiment, methods described also includes：
During cable modem is reached the standard grade, send upstream radio-frequency to the Cable Modem Terminal System and believe
Number；
When the signal to noise ratio of the upstream radio-frequency signal is unsatisfactory for the second sets requirement, at the cable modem end
The modulation system for being less than current up modulation system using transmission rate under the control of end system carries out up modulation.
Wherein in one embodiment, during cable modem is reached the standard grade, to the cable modem end
The step of end system sends upstream radio-frequency signal includes：
Distance measurement request signal is sent to the Cable Modem Terminal System.
Wherein in one embodiment, when the signal to noise ratio of the upstream radio-frequency signal is unsatisfactory for the second sets requirement,
The modulation system of current up modulation system is less than under the control of the Cable Modem Terminal System using transmission rate
The step of carrying out up modulation includes：
When the signal to noise ratio of the distance measurement request signal meets second sets requirement, in the cable modem
Other steps of upper line process are performed under the control of terminal system；Otherwise, in the control of the Cable Modem Terminal System
The lower modulation system for being less than current up modulation system using transmission rate of system carries out up modulation, and until the distance measurement request
The signal to noise ratio of signal meets second sets requirement.
A kind of thread control device on cable modem, described device includes：
Downlink radio-frequency signal receiver module, during being reached the standard grade in cable modem, receives downlink radio-frequency signal；
Descending signal to noise ratio monitoring modular, will for being unsatisfactory for the first setting in the signal to noise ratio for judging the downlink radio-frequency signal
When asking, consult to improve the launching electrical level of the Cable Modem Terminal System with Cable Modem Terminal System.
Wherein in one embodiment, the descending signal to noise ratio monitoring modular includes：
Level modulation monitoring unit, for being unsatisfactory for the first sets requirement in the signal to noise ratio for judging the downlink radio-frequency signal
When, the current launching electrical level for consulting to judge the Cable Modem Terminal System with Cable Modem Terminal System is
It is no to reach max-thresholds, if so, then carrying out Corticofugal Modulation of Somatosensory less than the modulation system of current downlink modulation system using transmission rate；
Otherwise, the launching electrical level of the Cable Modem Terminal System is improved.
Wherein in one embodiment, described device also includes：
Upstream radio-frequency signal sending module, during being reached the standard grade in cable modem, to the cable modulatedemodulate
Device terminal system is adjusted to send upstream radio-frequency signal；
Up signal to noise ratio monitoring modular, for being unsatisfactory for the second sets requirement in the signal to noise ratio of the upstream radio-frequency signal
When, the modulation of current up modulation system is less than using transmission rate under the control of the Cable Modem Terminal System
Mode carries out up modulation.
Above-mentioned cable modem reach the standard grade control method and device have the advantage that for：In the cable modem
Device is reached the standard grade in control method and device, when the signal to noise ratio for judging downlink radio-frequency signal is unsatisfactory for the first sets requirement, with cable
Modem terminal system is consulted to improve the launching electrical level of the Cable Modem Terminal System.When the raising cable
After the launching electrical level of modem terminal system, the level of cable modem reception just can be accordingly improved, so as to
The success rate that enough the raising cable modem docking collection of letters number is normally demodulated, what raising cable modem was successfully reached the standard grade can
By property.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
The accompanying drawing of other embodiment is obtained according to these accompanying drawings.
The flow chart of line control method on the cable modem that Fig. 1 is provided for an embodiment；
Fig. 2 is for the one of which of S200 has the step of line control method on the cable modem of embodiment illustrated in fig. 1
Body implementation method flow chart；
Fig. 3 is the one of which specific embodiment of line control method on the cable modem of embodiment illustrated in fig. 1
Flow chart；
Fig. 4 is the one of which specific embodiment of line control method on the cable modem of embodiment illustrated in fig. 1
In flow chart the step of comprise additionally in；
Fig. 5 is the one of which specific embodiment of line control method on the cable modem of embodiment illustrated in fig. 4
Flow chart；
The structured flowchart of thread control device on the cable modem that Fig. 6 is provided for another embodiment；
Fig. 7 is the one of which specific embodiment of thread control device on the cable modem of embodiment illustrated in fig. 6
In the structured flowchart that comprises additionally in.
Specific embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give presently preferred embodiments of the present invention.But, the present invention can be realized in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose for providing these embodiments is to make the understanding to the disclosure more thorough
Comprehensively.
Unless otherwise defined, the skill of all of technologies and scientific terms used here by the article and the technical field for belonging to invention
The implication that art personnel are generally understood that is identical.The term used in the description in invention is intended merely to description specifically herein
The purpose of embodiment, it is not intended that the limitation present invention.Term as used herein "and/or" includes one or more related institutes
The arbitrary and all of combination of list of items.
One embodiment provides line control method on a kind of cable modem, is performed by cable modem,
Including herein below, Fig. 1 is refer to.
Step S100. receives downlink radio-frequency signal during cable modem is reached the standard grade.
In the embodiment of the present invention, it refers to that cable modem accesses cable TV network that cable modem is reached the standard grade,
After cable modem is reached the standard grade successfully, cable modem can enter normal working condition.Downlink radio-frequency signal
It is that HFC (Hybrid are passed through by Cable Modem Terminal System CMTS (Cable Modem Terminal Systems)
Fiber-Coaxial, hybrid fiber coax) radiofrequency signal that is sent to cable modem of net.Wherein, cable
Modem terminal system be management control cable modem equipment, its configuration can by Console interfaces or with
Too network interface is completed, and configuration content mainly has：Downstream frequency, Corticofugal Modulation of Somatosensory mode, downlink electrical equality.
When step S200. judges that the signal to noise ratio of the downlink radio-frequency signal is unsatisfactory for the first sets requirement, modulated with cable
Demodulator terminal system consults to improve the launching electrical level of the Cable Modem Terminal System.
Wherein, under the first sets requirement cable modem under the current downlink modulation system can be demodulated normally
The corresponding SNR ranges of row radiofrequency signal.When the signal to noise ratio of downlink radio-frequency signal is unsatisfactory for the first sets requirement, cable is adjusted
Modulator-demodulator cannot then complete demodulation.The launching electrical level of the Cable Modem Terminal System is higher, then transmission power is got over
It is high, then the corresponding level that receives of cable modem is also higher, so as to be easier to be demodulated.
In sum, on cable modem provided in an embodiment of the present invention in line control method, when the raising electricity
After the launching electrical level of CMTS system, the level of cable modem reception just can be accordingly improved, so that
A success rate for the cable modem normal demodulation of the docking collection of letters number is improve, and then improves cable modem and successfully reached the standard grade
Reliability.
Wherein in one embodiment, step S200 includes herein below, refer to Fig. 2.
When step S210. judges that the signal to noise ratio of the downlink radio-frequency signal is unsatisfactory for the first sets requirement, modulated with cable
Demodulator terminal system consults to judge whether the current launching electrical level of the Cable Modem Terminal System reaches maximum threshold
Value, if so, then performing step S230；Otherwise, step S220 is performed.
Wherein, max-thresholds refer to the emission maximum level that Cable Modem Terminal System can bear.
Step S220. improves the launching electrical level of the Cable Modem Terminal System.
Therefore, as long as the launching electrical level of Cable Modem Terminal System is not reaching to the max-thresholds, it is possible to
The reliability that cable modem is successfully reached the standard grade is improved by improving the launching electrical level of Cable Modem Terminal System
Property.
Step S230. carries out Corticofugal Modulation of Somatosensory using transmission rate less than the modulation system of current downlink modulation system.
In the embodiment of the present invention, when the launching electrical level of Cable Modem Terminal System reaches the max-thresholds,
Can also be by adjusting the measure of Corticofugal Modulation of Somatosensory mode, further to improve the reliability that cable modem is successfully reached the standard grade.
Wherein, transmission rate is less than the modulation system of current downlink modulation system, simpler equivalent to than current downlink modulation system
Modulation system.
Assuming that in the case where launching electrical level has been maxed out threshold value, current downlink modulation system is 256QAM modulation methods
Formula, then admissible signal to noise ratio is 40dB or so, and at this moment cable modem can be demodulated normally, and if in transmitting procedure
Coaxial wire is lengthened again, so as to increase Line Attenuation so that the downlink radio frequency that Cable Modem Terminal System sends
Signal signal to noise ratio after coaxial wire reaches cable modem declines, and causes cable modem to demodulate.
Therefore, the embodiment of the present invention takes simpler Corticofugal Modulation of Somatosensory mode in order to overcome above mentioned problem, further, for example, be replaced by
64QAM modulation systems, because 64QAM modulation systems are compared with 256QAM modulation systems, the signal to noise ratio requirement to signal is relatively low, because
This can further improve the reliability that cable modem is normally demodulated.
Wherein in one embodiment, step S100 and step S200 includes herein below, refer to Fig. 3.
Step S110. receives the synchronizing signal from Cable Modem Terminal System.
In the step, synchronizing signal is SYNC frames, is periodically sent out by Cable Modem Terminal System.Synchronizing signal
Comprising temporal information.Cable modem is demodulated successfully if by synchronizing signal, then can synchronously itself time ginseng
Clock is examined, so that its uplink falls in correct time slot.
Step S240. judges whether the synchronizing signal meets the first sets requirement, if so, performing step S260；Otherwise,
Perform step S250.
Step S250. consults to improve the Cable Modem Terminal System with Cable Modem Terminal System
Launching electrical level, and until the signal to noise ratio of the synchronizing signal meets first sets requirement.
Specifically, cable modem can send respective request to the Cable Modem Terminal System believing
Number, so that the Cable Modem Terminal System improves launching electrical level.Wherein, cable modem and cable modulatedemodulate
Adjusting device terminal system can in advance set the agreement of correlation, with ensure the request signal can normal transmission to cable modulatedemodulate
Adjust device terminal system.
If the signal to noise ratio of synchronizing signal is unsatisfactory for the first sets requirement, cable modem cannot enter to synchronizing signal
Row demodulation, and then synchronous working cannot be completed.When cable modem sends corresponding to Cable Modem Terminal System
After request signal, Cable Modem Terminal System then improves launching electrical level, and again to cable modem transmission tune
Synchronizing signal after section.
In the embodiment of the present invention, cable modem is performed after step S250, can be continued since step S110
Circulation is performed, until the signal to noise ratio of the synchronizing signal meets first sets requirement.If it should be noted that synchronous letter
Number signal to noise ratio meet first sets requirement, in the communication process after, Cable Modem Terminal System is still
Corticofugal Modulation of Somatosensory can be carried out using the modulation system after final regulation, also, if because other situations cause cable modulatedemodulate
When adjusting device to start that downlink radio-frequency signal cannot be demodulated again, Cable Modem Terminal System then can further take transmission speed
The lower modulation system of rate carries out Corticofugal Modulation of Somatosensory.
It should be noted that step S250 can also just be repeated no more here using the specific embodiment shown in Fig. 2.
Other steps of line process in step S260. execution.
In the embodiment of the present invention, other steps of upper line process can include：Obtain upstream channel descriptor (UCD) and divide
With mapping message (MAP)；Found range (ranging), to calibrate transmission power；IP connections are set up, configuration file is obtained, is completed
Registration to Cable Modem Terminal System etc. is reached the standard grade step.
It is understood that the specific implementation of line control method is not limited to above-mentioned situation on cable modem,
Such as downlink radio-frequency signal can also be the other types in addition to synchronizing signal that Cable Modem Terminal System sends
Downlink radio-frequency signal.
Wherein in one embodiment, line control method also includes herein below on cable modem, refer to figure
4。
Step S300. sends during cable modem is reached the standard grade to the Cable Modem Terminal System
Upstream radio-frequency signal.
Wherein, it refers to that cable modem accesses cable TV network that cable modem is reached the standard grade, when cable modulation
After demodulator is reached the standard grade successfully, cable modem can enter normal working condition.Upstream radio-frequency signal is adjusted by cable
The radiofrequency signal that modulator-demodulator is sent by HFC nets to Cable Modem Terminal System.
Step S400. is adjusted when the signal to noise ratio of the upstream radio-frequency signal is unsatisfactory for the second sets requirement in the cable
The modulation system for being less than current up modulation system using transmission rate under the control of Modem Termination System carries out up tune
System.
Wherein, the second sets requirement refers to that Cable Modem Terminal System can be just under current up modulation system
The corresponding SNR ranges of upstream radio-frequency signal for often demodulating.Furthermore it is possible to be judged by Cable Modem Terminal System
Whether the signal to noise ratio of upstream radio-frequency signal meets the second sets requirement, if it is not, Cable Modem Terminal System then cannot be complete
Into demodulation, at this moment Cable Modem Terminal System can be to cable modem transmission corresponding control signal, to control
Cable modem carries out up modulation using the modulation system that transmission rate is less than current up modulation system.Transmission rate
Less than the modulation system of current up modulation system, equivalent to than the current up simpler modulation system of modulation system.
Assuming that current up modulation system is 16QAM (Quadrature Amplitude Modulation, orthogonal amplitude
Modulation), in its admissible SNR ranges, Cable Modem Terminal System can be demodulated normally, and if transmission
During coaxial wire lengthen again, so as to increase Line Attenuation so that cable modem send upstream radio-frequency letter
Signal to noise ratio declines number after coaxial wire reaches Cable Modem Terminal System one end, so as to cause cable modulatedemodulate
Adjusting device terminal system cannot demodulate.Therefore, the embodiment of the present invention is judging the letter of upstream radio-frequency signal to overcome above mentioned problem
Make an uproar than being unsatisfactory for during the second sets requirement, cable modem is taken simpler up modulation system, for example, be replaced by
QPSK (Quadrature Phase Shift Keyin, QPSK) is modulated, because QPSK modulation systems and 16QAM are adjusted
Mode processed is compared, relatively low to the requirement of the signal to noise ratio of signal, thus Cable Modem Terminal System can be improved can be normal
The reliability of demodulation.
Therefore, on above-mentioned cable modem in line control method, because the modulation system compared with low transmission rate is not required to
Signal to noise ratio that will be higher just can normally be demodulated with receiving end, therefore during cable modem is reached the standard grade, can be further
A success rate for the Cable Modem Terminal System normal demodulation of the docking collection of letters number is improved, so as to further improve cable modulatedemodulate
The reliability for adjusting device successfully to reach the standard grade, and also can further extend cable modem and cable modem termination system
The distance of data transfer between system.
Wherein in one embodiment, step S300 and step S400 includes herein below, refer to Fig. 5.
Step S310. sends distance measurement request signal to the Cable Modem Terminal System.
Distance measurement request signal is distance measurement request frame (RNG-REQ), represents cable modem and has been completed same step
Section, and the range finding stage is initially entered, to determine that network delay and request level are adjusted.
In addition, actually in line process before step S310, cable modem is gone back in addition to receiving synchronizing signal
Upstream channel descriptor and allocation map message from Cable Modem Terminal System can be received.Wherein, it is up
Channel descriptor is used to define the characteristic of data feedback channel, such as including centre frequency, channel bandwidth, time slot size, data feedback channel
ID etc..Allocation map message is the MAC sent by a Cable Modem Terminal System (Media Access
Control, media access control) message is managed, how the small time slot for describing up channel uses.
Whether distance measurement request signal meets the second sets requirement described in step S410., if so, performing step S430；Otherwise,
Perform step S420.
Step S420. is up less than current using transmission rate under the control of the Cable Modem Terminal System
The modulation system of modulation system carries out up modulation, and until the signal to noise ratio of the distance measurement request signal meets second setting
It is required that.
If the signal to noise ratio of distance measurement request signal is unsatisfactory for the second sets requirement, Cable Modem Terminal System cannot
Distance measurement request signal is demodulated, and then work of finding range cannot be completed.At this moment, Cable Modem Terminal System can be to
Cable modem sends corresponding control signal, so as to control cable modem to change up modulation system, that is, uses
The lower modulation system of speed carries out up modulation.
In the embodiment of the present invention, cable modem is performed after step S420, can be continued since step S310
Circulation is performed, until the signal to noise ratio of the distance measurement request signal meets second sets requirement.If it should be noted that surveyed
Signal to noise ratio away from request signal meets second sets requirement, and in the communication process after, cable modem is still
Up modulation can be carried out using the modulation system after final regulation, also, if because other situations cause cable modulatedemodulate
Adjust device terminal system to start that upstream radio-frequency signal cannot be demodulated again after, cable modem then can further take transmission speed
The lower modulation system of rate carries out up modulation.
Step S430. performs other steps of line process under the control of the Cable Modem Terminal System.
In the embodiment of the present invention, other steps that cable modem performs upper line process can include：Set up IP companies
Connect, obtain the steps of reaching the standard grade such as configuration file, the registration for being accomplished to Cable Modem Terminal System.
It is understood that the specific implementation of line control method is not limited to above-mentioned situation on cable modem,
Such as upstream radio-frequency signal can also be that the other types in addition to distance measurement request signal that cable modem sends are up
Radiofrequency signal.
In another embodiment, there is provided thread control device on a kind of cable modem, described device includes following
Content, refer to Fig. 6.
Downlink radio-frequency signal receiver module 100, during being reached the standard grade in cable modem, receives downlink radio frequency letter
Number.
Descending signal to noise ratio monitoring modular 200, sets for being unsatisfactory for first in the signal to noise ratio for judging the downlink radio-frequency signal
During provisioning request, consult to improve the transmitting electricity of the Cable Modem Terminal System with Cable Modem Terminal System
It is flat.
On cable modem provided in an embodiment of the present invention in thread control device, when the raising cable modem
After the launching electrical level of device terminal system, the level of cable modem reception just can be accordingly improved, so as to improve cable
A success rate for the normal demodulation of the modem docking collection of letters number, and then improve the reliability that cable modem is successfully reached the standard grade.
Wherein in one embodiment, descending signal to noise ratio monitoring modular 200 includes：
Level modulation monitoring unit, for being unsatisfactory for the first sets requirement in the signal to noise ratio for judging the downlink radio-frequency signal
When, the current launching electrical level for consulting to judge the Cable Modem Terminal System with Cable Modem Terminal System is
It is no to reach max-thresholds, if so, then carrying out Corticofugal Modulation of Somatosensory less than the modulation system of current downlink modulation system using transmission rate；
Otherwise, the launching electrical level of the Cable Modem Terminal System is improved.
Wherein in one embodiment, described device also includes herein below, refer to Fig. 7.
Upstream radio-frequency signal sending module 300, during being reached the standard grade in cable modem, modulates to the cable
Demodulator terminal system sends upstream radio-frequency signal.
Up signal to noise ratio monitoring modular 400, will for being unsatisfactory for the second setting in the signal to noise ratio of the upstream radio-frequency signal
When asking, the tune of current up modulation system is less than using transmission rate under the control of the Cable Modem Terminal System
Mode processed carries out up modulation.
It should be noted that thread control device is provided with a upper embodiment on the cable modem of the present embodiment offer
Cable modem on line control method correspondence, just repeat no more here.
Fig. 1 to Fig. 5 is the schematic flow sheet of the method for the embodiment of the present invention.Although it should be understood that Fig. 1 to Fig. 5
Each step in flow chart shows successively according to the instruction of arrow, but these steps are not necessarily to be indicated according to arrow
Order is performed successively.Unless expressly stated otherwise herein, the not strict order limitation of the execution of these steps, it can be with
Perform in the other order.And, at least a portion step in Fig. 1 to Fig. 5 can include many sub-steps or multiple ranks
Section, these sub-steps or stage are not necessarily to perform completion in synchronization, and can be to be performed at the different moment, its
Execution sequence is also not necessarily to be carried out successively, and can be sub-step with other steps or other steps or stage extremely
A few part is performed in turn or alternately.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of line control method on cable modem, methods described includes：
During cable modem is reached the standard grade, downlink radio-frequency signal is received；
When judging that the signal to noise ratio of the downlink radio-frequency signal is unsatisfactory for the first sets requirement, with Cable Modem Terminal System
Consult the launching electrical level of the raising Cable Modem Terminal System.
2. line control method on cable modem according to claim 1, it is characterised in that judge described descending penetrate
When the signal to noise ratio of frequency signal is unsatisfactory for the first sets requirement, consult to improve the cable tune with Cable Modem Terminal System
The step of launching electrical level of Modem Termination System, includes：
When judging that the signal to noise ratio of the downlink radio-frequency signal is unsatisfactory for the first sets requirement, with Cable Modem Terminal System
Negotiation judges whether the current launching electrical level of the Cable Modem Terminal System reaches max-thresholds, if so, then using
Transmission rate carries out Corticofugal Modulation of Somatosensory less than the modulation system of current downlink modulation system；Otherwise, the cable modem is improved
The launching electrical level of device terminal system.
3. line control method on cable modem according to claim 1, it is characterised in that in cable modem
During device is reached the standard grade, receive downlink radio-frequency signal the step of include：
Receive the synchronizing signal from Cable Modem Terminal System.
4. line control method on cable modem according to claim 3, it is characterised in that judge described descending penetrate
When the signal to noise ratio of frequency signal is unsatisfactory for the first sets requirement, consult to improve the cable tune with Cable Modem Terminal System
The step of launching electrical level of Modem Termination System, includes：
Judge whether the signal to noise ratio of the synchronizing signal meets the first sets requirement, if so, performing other steps of upper line process；
Otherwise, consult to improve the launching electrical level of the Cable Modem Terminal System with Cable Modem Terminal System, and
Until the signal to noise ratio of the synchronizing signal meets first sets requirement.
5. line control method on cable modem according to claim 1, it is characterised in that methods described is also wrapped
Include：
During cable modem is reached the standard grade, upstream radio-frequency signal is sent to the Cable Modem Terminal System；
When the signal to noise ratio of the upstream radio-frequency signal is unsatisfactory for the second sets requirement, in the cable modem termination system
The modulation system for being less than current up modulation system using transmission rate under the control of system carries out up modulation.
6. line control method on cable modem according to claim 5, it is characterised in that in cable modem
During device is reached the standard grade, to the Cable Modem Terminal System send upstream radio-frequency signal the step of include：
Distance measurement request signal is sent to the Cable Modem Terminal System.
7. line control method on cable modem according to claim 6, it is characterised in that when the upstream radio-frequency
When the signal to noise ratio of signal is unsatisfactory for the second sets requirement, using transmission under the control of the Cable Modem Terminal System
The step of modulation system that speed is less than current up modulation system carries out up modulation includes：
When the signal to noise ratio of the distance measurement request signal meets second sets requirement, in the cable modem termination
Other steps of upper line process are performed under the control of system；Otherwise, under the control of the Cable Modem Terminal System
The modulation system for being less than current up modulation system using transmission rate carries out up modulation, and until the distance measurement request signal
Signal to noise ratio meet second sets requirement.
8. thread control device on a kind of cable modem, it is characterised in that described device includes：
Downlink radio-frequency signal receiver module, during being reached the standard grade in cable modem, receives downlink radio-frequency signal；
Descending signal to noise ratio monitoring modular, for being unsatisfactory for the first sets requirement in the signal to noise ratio for judging the downlink radio-frequency signal
When, consult to improve the launching electrical level of the Cable Modem Terminal System with Cable Modem Terminal System.
9. thread control device on cable modem according to claim 8, it is characterised in that the descending signal to noise ratio
Monitoring modular includes：
Level modulation monitoring unit, during for being unsatisfactory for the first sets requirement in the signal to noise ratio for judging the downlink radio-frequency signal,
With Cable Modem Terminal System consult judge the Cable Modem Terminal System current launching electrical level whether
Max-thresholds are reached, if so, then carrying out Corticofugal Modulation of Somatosensory less than the modulation system of current downlink modulation system using transmission rate；It is no
Then, the launching electrical level of the Cable Modem Terminal System is improved.
10. thread control device on cable modem according to claim 8, it is characterised in that described device is also wrapped
Include：
Upstream radio-frequency signal sending module, during being reached the standard grade in cable modem, to the cable modem
Terminal system sends upstream radio-frequency signal；
Up signal to noise ratio monitoring modular, for when the signal to noise ratio of the upstream radio-frequency signal is unsatisfactory for the second sets requirement,
The modulation system of current up modulation system is less than under the control of the Cable Modem Terminal System using transmission rate
Carry out up modulation.
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| CN201611188385.4A CN106878577B (en) | 2016-12-20 | 2016-12-20 | Cable modem online control method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111600764A (en) * | 2020-06-04 | 2020-08-28 | 广州市番禺有线数字电视网络有限公司 | MoCA network fault detection method |
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|---|---|---|---|---|
| CN1309503A (en) * | 2000-02-14 | 2001-08-22 | 夏普公司 | Tuner of cable modem |
| JP2003111046A (en) * | 2001-09-28 | 2003-04-11 | Maspro Denkoh Corp | Cable modem and cable modem system |
| US20130223506A1 (en) * | 2012-02-28 | 2013-08-29 | Broadcom Corporation | Flexible adaptive equalizer |
| EP3018898A1 (en) * | 2014-11-07 | 2016-05-11 | Teleste Oyj | Use of an apparatus for improving signal to noise ratio |
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2016
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1309503A (en) * | 2000-02-14 | 2001-08-22 | 夏普公司 | Tuner of cable modem |
| JP2003111046A (en) * | 2001-09-28 | 2003-04-11 | Maspro Denkoh Corp | Cable modem and cable modem system |
| US20130223506A1 (en) * | 2012-02-28 | 2013-08-29 | Broadcom Corporation | Flexible adaptive equalizer |
| EP3018898A1 (en) * | 2014-11-07 | 2016-05-11 | Teleste Oyj | Use of an apparatus for improving signal to noise ratio |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111600764A (en) * | 2020-06-04 | 2020-08-28 | 广州市番禺有线数字电视网络有限公司 | MoCA network fault detection method |
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