CN101656555B - ADSL2+ access system and velocity pre-estimating method thereof - Google Patents
ADSL2+ access system and velocity pre-estimating method thereof Download PDFInfo
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Abstract
The invention provides an ADSL2+ access system and a velocity pre-estimating method thereof and relates to the broadband access process. The velocity pre-estimating method of the ADSL2+ access system comprises the following steps: establishing the linkage of user line access equipment and user equipment; recording initial maximal reachable velocity reported by the user equipment before the user line access equipment carries out power adjustment, wherein the power adjustment is based on a training result of the user line access equipment and the user equipment; and carrying out the velocity pre-estimation according to the initial maximal reachable velocity. The practical communication capability of a user line can be more accurately acquired on the basis of the ADSL2+ access system and the velocity pre-estimating method thereof.
Description
Technical field
The present invention relates to broadband access technology, particularly relate to a kind of ADSL2+ (asymmetric digital subscriber line-extended bandwidth, ADSL extending bandwidth second generation mode) connecting system and speed predictor method thereof.
Background technology
At present, ADSL and ADSL2+ are mainly adopted in broadband access, account for about 80% of total number of users, and especially the ADSL2+ technology is progressively replacing ADSL with downstream rate advantage under its short-distance and medium-distance and price advantage.Along with the high bandwidth business demand (like high definition IPTV (Internet protocol television; The needs of continuous increase Web TV)) and line upkeep row barrier, how can open to the maximum of subscriber's line that speed estimates exactly is operation department problem demanding prompt solution always.
Estimate the method that extensively adopts at present for the DSL line speed and be based on speed compliance rate system; Promptly through DSLAM (digital subscriber line access multiplexer; Digital Subscriber Line Access Multiplexer) network management system is gathered and is analyzed the link setup parameter of DSLAM equipment and MODEM (modulator-demodulator, modulator-demodulator) equipment.Because the speed template overwhelming majority that existing network is opened is speed limit template (being that the up-downgoing rate limit is a certain value), therefore " maximum achievable rate " parameter is mainly passed through in the assessment of line capacity.
The ADSL2+ standard consider reduce copper cable to cross talk effects and power consumption needs that reduce local side apparatus, it is machine-processed to have defined PCB (Power Cutback, back-off), L2 (low-power consumption mode 2), the adjustment of L3 (low-power consumption mode 3) constant power.Particularly the application of PCB in the ADSL2+ standard compared the ADSL standard and had bigger adjusting range, and its extensive use in existing network equipment.Dispose at local side apparatus under the situation such as lower speed limit template (as less than 3Mbit/s) or free of data transmitting-receiving; If local side apparatus can suitably reduce downlink transmission power when the signal to noise ratio remaining that draws to training surpassed the thresholding of setting behind link setup; Or combine training again to make the speed that can satisfy the link setup template can guarantee that again current noise redundancy still satisfies the target noise remaining value requirement of setting, and is of value to the dynamic range that adapts to remote receiver.Existence just because of PCB; And the situation inconsistent (different DSL nest plates, software and local side ustomer premises access equipment are designed with than big difference) that each manufacturer's chipset is supported; During short-distance and medium-distance under a lot of situation local side be not full power transmissions; The descending achievable rate that this moment, user side MODEM calculated might not be the maximum capacity of circuit, and the actual measurement maximum can 8～10Mbit/s on the low side, referring to Fig. 1.Among Fig. 1, the situation when
is descending maximum achievable rate speed limit 512Kbps (launching PCB); Situation when
is descending maximum achievable rate speed limit 12Mbps (launching PCB); Situation when
is descending actual link building rate (not speed limit).The parameter that is supported under the data-transmission mode owing to present most MODEM simultaneously dynamically updates; Therefore the descending maximum achievable rate that causes providing has significantly decline when sending than total power; Thereby the speed that the data analysis that DSLAM webmaster rate analysis system is obtained according to collection is estimated significantly is lower than the speed that reality can be opened; Under the situation of the general speed limit of current speed limit template lower (descending speed limit is lower than 3Mbit/s), influenced the assessment of subscriber's line being opened the high bandwidth professional ability; Causing part to have the ability to open the professional subscriber's line of high bandwidth is underestimated; Waste the resource of telecommunications to a certain extent, also be unfavorable for safeguarding and arranging simultaneously the needs of barrier.
Summary of the invention
The objective of the invention is to propose a kind of speed predictor method of the ADSL2+ of being used for connecting system, to obtain maximum more accurately achievable rate parameter.
For realizing above-mentioned purpose, the invention provides a kind of speed predictor method of the ADSL2+ of being used for connecting system, comprising: the subscribers feeder access device is set up with subscriber equipment and is linked; Said subscribers feeder access device write down the initial maximum achievable rate of said user equipment to report before carrying out the power adjustment, the foundation of wherein said power adjustment is the training result of said subscribers feeder access device and said subscriber equipment; With carry out said speed according to said initial maximum achievable rate and estimate.
In one embodiment, the speed predictor method comprises that also said subscribers feeder access device writes down the current maximum achievable rate of said user equipment to report after carrying out said power adjustment; With carry out said speed according to said initial maximum achievable rate and said current maximum achievable rate and estimate.
In one embodiment, the speed predictor method also is included in the predetermined period and through said subscribers feeder access device said initial maximum achievable rate and said current maximum achievable rate is repeatedly gathered; When the minimum value in the current maximum achievable rate of repeatedly gathering during greater than said rate capacity estimation results, with of the final discreet value of said rate capacity estimation results as said subscriber's line rate capacity; With when the minimum value in a plurality of said current maximum achievable rates during less than said rate capacity estimation results; With said rate capacity estimation results is the final discreet value of said subscriber's line rate capacity, and the minimum value in a plurality of said current maximum achievable rates is as the lower limit reference value of said subscriber's line rate capacity.
In one embodiment; The speed predictor method also comprises when because during the disconnection reconnecting of the said subscriber equipment that causes except the adjustment of said power; Said subscribers feeder access device said subscriber equipment and said subscribers feeder access device rebulid link after, the initial maximum achievable rate that reports of recording user equipment again before carrying out the adjustment of said power.
Network management system the objective of the invention is to propose a kind of ADSL2+ connecting system, so that can be obtained maximum more accurately achievable rate parameter.
For realizing above-mentioned purpose; The present invention also provides a kind of ADSL2+ connecting system, it is characterized in that, comprising: the subscribers feeder access device; Be used for linking with subscriber equipment foundation; Said subscribers feeder access device comprises: initial maximum achievable rate record cell, be used for the initial maximum achievable rate that recording user equipment reports before carrying out the power adjustment, and the foundation of wherein said power adjustment is the training result of said subscribers feeder access device and said subscriber equipment; Estimate analytical equipment with speed, be used for carrying out speed and estimate according to said initial maximum achievable rate.
In one embodiment, said subscribers feeder access device also comprises: current maximum achievable rate record cell is used for after carrying out the adjustment of said power, writing down the current maximum achievable rate of said user equipment to report; Said speed is estimated analytical equipment and is used for carrying out said speed according to said initial maximum achievable rate and said current maximum achievable rate and estimates.
Further, speed estimates that analytical equipment is averaged to the said initial maximum achievable rate of repeatedly gathering or the processing of minimum value algorithm, with the mean value of initial maximum achievable rate or minimum value as the rate capacity estimation results; When the minimum value in the said current maximum achievable rate of repeatedly gathering during greater than said rate capacity estimation results, said speed is estimated analytical equipment with the final discreet value of said rate capacity estimation results as said subscriber's line rate capacity.When the minimum value in a plurality of said current maximum achievable rates during less than said rate capacity estimation results; It is the final discreet value of said subscriber's line rate capacity with said rate capacity estimation results that said speed is estimated analytical equipment, and the minimum value in a plurality of said current maximum achievable rates is the lower limit reference value of said subscriber's line rate capacity.
In one embodiment; Said subscribers feeder access device comprises: the record updating block; Be used for when because during the disconnection reconnecting of the said subscriber equipment that causes except the adjustment of said power; Said subscriber equipment and said subscribers feeder access device rebulid link after, the initial maximum achievable rate that reports of recording user equipment again before carrying out the adjustment of said power.
In one embodiment, said speed is estimated analytical equipment and is integrated in the network management system that is connected with said subscribers feeder access device, or is connected with said network management system through interface.
Based on technique scheme; According to embodiments of the invention; ADSL2+ connecting system and speed predictor method can obtain the actual ability of opening of subscriber's line more accurately, reduce the difference that different DSL nest plates or device software provide parameter, the significantly reduced situation of descending maximum achievable rate acquired data values that shielding causes because of the adjustment of local side apparatus power; Improve the accuracy that ADSL2+ speed is estimated, satisfy the open-minded of high bandwidth business.In addition, the present invention implements comparatively simple, flexible, and less to the modification of existing system.
Description of drawings
Accompanying drawing described herein is used to provide further explanation of the present invention, constitutes a part of the present invention.Illustrative examples of the present invention and explanation thereof only are used to explain the present invention, but do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the influence sketch map of PCB power adjustment mechanism to descending maximum achievable rate.
Fig. 2 is the structural representation according to the ADSL2+ connecting system of the embodiment of the invention.
Fig. 3 is the flow chart according to the speed predictor method of the embodiment of the invention.
Fig. 4 is the flow chart of speed predictor method according to another embodiment of the present invention.
Fig. 5 is the structural representation of ADSL2+ connecting system according to another embodiment of the present invention.
Fig. 6 is the structural representation according to the ADSL2+ connecting system of further embodiment of this invention.
Embodiment
With reference to the accompanying drawings the present invention is described in more detail, exemplary embodiment of the present invention wherein is described.
Fig. 2 is the structural representation according to the ADSL2+ connecting system 200 of the embodiment of the invention.ADSL2+ connecting system 200 comprises user side MODEM 202, ADSL2+DSLAM equipment 204 and DSLAM network management system 206.
ADSL2+DSLAM equipment 204 can be accomplished converging of many subscriber's lines, inserts the upper strata convergence device.Simultaneously send querying command according to demand, daily record or MIB (management information base, management information bank) through ADSL2+DSLAM equipment 204 call information such as maximum achievable rate.
DSLAM network management system 206 can be connected with ADSL2+DSLAM equipment 204 through aggregation networks or dedicated network.DSLAM network management system 206 is used for ADSL2+DSLAM equipment 204 is configured management, performance management, statistic and fault management etc.In one embodiment, DSLAM network management system 206 can integrated speed be estimated analytical equipment 12, and link setup parameters such as the present rate of timing acquiring DSLAM equipment user line port and maximum achievable rate are carried out statistical analysis, accomplishes speed and estimates function.In another embodiment, speed is estimated analytical equipment 12 and also can be used as third party's device and link to each other with DSLAM network management system 206 through interface and supply DSLAM network management system 206 to call data.
Fig. 3 is the flow chart according to the speed predictor method 300 of the embodiment of the invention.In step 302, the subscribers feeder access device is set up with subscriber equipment and is linked.Subscribers feeder access device (like ADSL2+DSLAM equipment) can receive the link setup requirement that subscriber equipment (like user side MODEM) is initiated, and links with subscriber equipment foundation.
In step 304, the subscribers feeder access device initial maximum achievable rate that recording user equipment reports before carrying out the power adjustment, wherein the foundation of power adjustment is the training result of subscribers feeder access device and subscriber equipment.
In step 306, carry out speed according to initial maximum achievable rate and estimate.In one embodiment, can in predetermined period, repeatedly gather initial maximum achievable rate, with the minimum value of initial maximum achievable rate or mean value as the rate capacity estimation results.When the line speed ability is estimated in analysis, can be main foundation with initial maximum achievable rate, to the initial maximum achievable rate of repeatedly gathering average, the processing of minimum value scheduling algorithm, with it as the parameter of estimating the speed statistical calculation.
Fig. 4 is the flow chart of speed predictor method 400 according to another embodiment of the present invention.The description of speed predictor method 400 has combined the ADSL2+ connecting system 200 among Fig. 2, but is not limited to the form of ADSL2+ connecting system 200.
In step 402, subscriber equipment is initiated the link setup request.Can initiate to set up the request of link to ADSL2+DSLAM equipment 204 (subscribers feeder access device) such as user side MODEM 202.
In step 404, it is mutual that subscriber equipment and subscribers feeder access device are accomplished training parameter, the link setup success.Such as, user side MODEM 202 is mutual with ADSL2+DSLAM equipment 204 completion training parameters, and successful foundation link.
In step 406, subscriber equipment calculates descending achievable rate according to training parameter.Such as, generally, user side MODEM 202 can calculate descending achievable rate, and it is according to being the training interaction results with ADSL2+DSLAM equipment 204.The accuracy of the descending achievable rate that user side MODEM 202 obtains depends on the transmitted power etc. of line condition, noise circumstance and the ADSL2+DSLAM equipment 204 of training stage.
In step 408, the descending achievable rate of user equipment to report.Such as, MODEM 202 can report ADSL2+DSLAM equipment 204 with its descending achievable rate that obtains.
In step 410, the initial maximum achievable rate that subscribers feeder access device record recording user equipment reports.Such as, ADSL2+DSLAM equipment 204 is recorded in it in initial maximum achievable rate field with the descending achievable rate that daily record or MIB storehouse stored in form user side MODEM 202 report.
In step 412, the subscribers feeder access device carries out the power adjustment, and wherein the foundation of power adjustment is the training result of subscribers feeder access device and subscriber equipment.Such as, ADSL2+DSLAM equipment 204 can adopt PCB, L2, L3 constant power adjustment mechanism according to training result, and transmitted power is adjusted.
In step 414, subscriber equipment recomputates descending achievable rate according to new transmitted power, and dynamically updates the descending achievable rate of subscriber equipment record.Such as, user side MODEM 202 finds that received power reduces, and can recomputate descending achievable rate, and the descending achievable rate of user side MODEM 202 records is dynamically updated.In one embodiment, user side MODEM 202 can upload descending achievable rate automatically.In another embodiment, user side MODEM 202 also can wait for after speed is estimated analytical equipment 12 initiation querying commands and upload descending achievable rate again.
In step 416; When because during the disconnection reconnecting of the subscriber equipment that causes except power adjustment; The subscribers feeder access device subscriber equipment and subscribers feeder access device rebulid link after, the initial maximum achievable rate that reports of recording user equipment again before carrying out power adjustment.Such as, if the disconnection reconnecting that non-PCB power adjustment causes takes place, ADSL2+DSLAM equipment 204 can write down initial maximum achievable rate again.(and maximum achievable rate) and the in close relations of factors such as (other nearby lines are disturbed) of crosstalking because DSL circuit link building rate wait the maximum achievable rate that causes to descend to be normal, to be to need consideration when speed is estimated if crosstalk.But the maximum achievable rate that the adjustment of PCB constant power causes descends and is equivalent to deliberately reduce maximum achievable rate, is inaccurate for estimating.Therefore, for non-PCB constant power adjustment causing disconnection reconnecting (as close on many to line to activating simultaneously, crosstalk noise enlarges markedly; Perhaps user's shutdown re-powers activation etc.); Can repeating step 402-416, and ADSL2+DSLAM equipment 204 can write down initial maximum achievable rate again.
In step 418, speed is estimated analytical equipment and is sent descending achievable rate acquisition.Such as, speed is estimated analytical equipment 12 can send the downstream rate acquisition to ADSL2+DSLAM equipment 204.
In step 420, the subscribers feeder access device sends descending achievable rate querying command.Can send descending achievable rate querying command to user side MODEM 202 such as ADSL2+DSLAM equipment 204.
In step 422, ustomer premises access equipment reports current descending achievable rate.Such as, user side MODEM 202 can report current descending achievable rate to ADSL2+DSLAM equipment 204.
In step 424, the current maximum achievable rate that subscribers feeder access device recording user equipment reports.Such as, ADSL2+DSLAM equipment 204 can be recorded in the data that user side MODEM 202 reports in the current maximum achievable rate field.
In step 426, the subscribers feeder access device reports initial maximum achievable rate and current maximum achievable rate.Can initial maximum achievable rate and current maximum achievable rate be reported speed such as, ADSL2+DSLAM equipment 204 and estimate analytical equipment 12.
In step 428, speed is estimated analytical equipment and is carried out speed according to initial maximum achievable rate and current maximum achievable rate and estimate.Such as, speed is estimated analytical equipment 12 and can in predetermined period, repeatedly be gathered initial maximum achievable rate and current maximum achievable rate, more comprehensively to estimate the basic link setup ability of subscriber's line.On the one hand; When the line speed ability is estimated in analysis; With initial maximum achievable rate is main foundation; Initial maximum achievable rate to repeatedly gathering is averaged, the processing of minimum value scheduling algorithm, with it as the parameter of estimating the speed statistical calculation, with the minimum value of initial maximum achievable rate or mean value as the rate capacity estimation results.On the other hand, to estimate analytical equipment 12 be reference value with current maximum achievable rate to speed.Wherein, when the minimum value in the current maximum achievable rate of repeatedly gathering during greater than the rate capacity estimation results, with of the final discreet value of rate capacity estimation results as the subscriber's line rate capacity; When the minimum value in a plurality of current maximum achievable rates during less than the rate capacity estimation results; With of the final discreet value of rate capacity estimation results as the subscriber's line rate capacity; Minimum value in a plurality of current maximum achievable rates is as the lower limit reference value of subscriber's line rate capacity, with the rate capacity scope of the minimum value in rate capacity estimation results and this current maximum achievable rate as subscriber's line.
Fig. 5 is the structural representation of ADSL2+ connecting system 500 according to another embodiment of the present invention.ADSL2+ connecting system 500 comprises that subscribers feeder access device 502 and speed estimates analytical equipment 504.
Subscribers feeder access device 502 is used for linking with subscriber equipment foundation.Subscribers feeder access device 502 comprises initial maximum achievable rate record cell 22; Be used for the initial maximum achievable rate that recording user equipment reports before carrying out the power adjustment, wherein the foundation of power adjustment is the training result of subscribers feeder access device 502 and subscriber equipment.
Speed is estimated analytical equipment 504 and is used for carrying out speed according to initial maximum achievable rate and estimates.In one embodiment, speed is estimated analytical equipment 504 and can in predetermined period, repeatedly be gathered initial maximum achievable rate.When the line speed ability is estimated in analysis; It can be main foundation with initial maximum achievable rate that speed is estimated analytical equipment 504; Initial maximum achievable rate to repeatedly gathering is averaged, the processing of minimum value scheduling algorithm, with it as the parameter of estimating the speed statistical calculation.
Fig. 6 is the structural representation according to the ADSL2+ connecting system 600 of further embodiment of this invention.ADSL2+ connecting system 600 comprises that subscribers feeder access device 602, speed estimates analytical equipment 604.
Subscribers feeder access device 602 is used for linking with subscriber equipment foundation.Subscribers feeder access device 602 comprises initial maximum achievable rate record cell 32, current maximum achievable rate record cell 34 and record updating block 36.Initial maximum achievable rate record cell 32 is used for the initial maximum achievable rate that recording user equipment reports before carrying out the power adjustment, and wherein the foundation of power adjustment is the training result of subscribers feeder access device 602 and subscriber equipment.Current maximum achievable rate record cell 34 is used for the current maximum achievable rate that recording user equipment reports after carrying out the power adjustment.Record updating block 36 is used for when because when adjusting the disconnection reconnecting of the subscriber equipment cause except power; Subscriber equipment and subscribers feeder access device 602 rebulid link after, the initial maximum achievable rate that reports of recording user equipment again before carrying out power adjustment.
Speed is estimated analytical equipment 604 and is used for carrying out speed according to initial maximum achievable rate and current maximum achievable rate and estimates.When the minimum value in the current maximum achievable rate of repeatedly gathering during greater than the rate capacity estimation results, speed is estimated analytical equipment with the final discreet value of rate capacity estimation results as the subscriber's line rate capacity; When the minimum value in a plurality of current maximum achievable rates during less than the rate capacity estimation results; Speed is estimated analytical equipment with the final discreet value of rate capacity estimation results as the subscriber's line rate capacity; Minimum value in a plurality of current maximum achievable rates is as the lower limit reference value of subscriber's line rate capacity, with the rate capacity scope of the minimum value in rate capacity estimation results and this current maximum achievable rate as subscriber's line.Speed is estimated analytical equipment 604 and can be integrated in the network management system that is connected with subscribers feeder access device 602, or is connected with network management system through interface.
According to embodiments of the invention; ADSL2+ connecting system and speed predictor method can obtain the actual ability of opening of subscriber's line more accurately; Reducing different DSL nest plates or device software provides the difference of parameter; Shielding improves the accuracy that ADSL2+ speed is estimated because of the significantly reduced situation of descending maximum achievable rate acquired data values that the adjustment of local side apparatus power causes, and satisfies the open-minded of high bandwidth business.In addition, the present invention implements comparatively simple, flexible, and less to the modification of existing system.
Description of the invention provides for example with for the purpose of describing, and is not the disclosed form that exhaustively perhaps limit the invention to.Such as, the embodiment that describes in the preceding text is mainly used in the ADSL2+ connecting system, and is suitable for too for the present invention of ADSL connecting system.A lot of modifications and variation are obvious for those of ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment that have various modifications that the present invention's design is suitable for special-purpose.
Claims (5)
1. a speed predictor method that is used for the ADSL2+ connecting system is characterized in that, comprising:
The subscribers feeder access device is set up with subscriber equipment and is linked;
Said subscribers feeder access device write down the initial maximum achievable rate of said user equipment to report before carrying out the power adjustment, the foundation of wherein said power adjustment is the training result of said subscribers feeder access device and said subscriber equipment;
Said subscribers feeder access device writes down the current maximum achievable rate of said user equipment to report after carrying out said power adjustment; With
Carrying out speed according to said initial maximum achievable rate and said current maximum achievable rate estimates;
Wherein, saidly carry out speed according to said initial maximum achievable rate and said current maximum achievable rate and estimate and comprise:
In predetermined period, said initial maximum achievable rate and said current maximum achievable rate are repeatedly gathered through said subscribers feeder access device;
The initial maximum achievable rate of repeatedly gathering is averaged or the processing of minimum value algorithm, with the mean value of initial maximum achievable rate or minimum value as the rate capacity estimation results;
When the minimum value in the current maximum achievable rate of repeatedly gathering during greater than the rate capacity estimation results, with of the final discreet value of rate capacity estimation results as the subscriber's line rate capacity; With
When the minimum value in a plurality of said current maximum achievable rates during less than the rate capacity estimation results; With of the final discreet value of rate capacity estimation results, with the lower limit reference value of the minimum value in a plurality of said current maximum achievable rates as said subscriber's line rate capacity as the subscriber's line rate capacity.
2. speed predictor method according to claim 1 is characterized in that, comprising:
When because during the disconnection reconnecting of the said subscriber equipment that causes except the adjustment of said power; Said subscribers feeder access device said subscriber equipment and said subscribers feeder access device rebulid link after, the initial maximum achievable rate that reports of recording user equipment again before carrying out the adjustment of said power.
3. an ADSL2+ connecting system is characterized in that, comprising:
The subscribers feeder access device is used for linking with subscriber equipment foundation; With
Speed is estimated analytical equipment, is used for carrying out speed according to initial maximum achievable rate and current maximum achievable rate and estimates;
Wherein, said subscribers feeder access device comprises:
Initial maximum achievable rate record cell is used for the initial maximum achievable rate that recording user equipment reports before carrying out the power adjustment, and the foundation of wherein said power adjustment is the training result of said subscribers feeder access device and said subscriber equipment;
Current maximum achievable rate record cell is used for after carrying out the adjustment of said power, writing down the current maximum achievable rate of said user equipment to report;
Said speed estimates that analytical equipment is averaged to the said initial maximum achievable rate of repeatedly gathering or the processing of minimum value algorithm, with the mean value of initial maximum achievable rate or minimum value as the rate capacity estimation results;
When the minimum value in the current maximum achievable rate of repeatedly gathering during greater than the rate capacity estimation results, said speed is estimated analytical equipment with the final discreet value of rate capacity estimation results as the subscriber's line rate capacity;
When the minimum value in a plurality of said current maximum achievable rates during less than the rate capacity estimation results; Said speed is estimated analytical equipment with the final discreet value of rate capacity estimation results as said subscriber's line rate capacity, with the lower limit reference value of the minimum value in a plurality of current maximum achievable rates as said subscriber's line rate capacity.
4. ADSL2+ connecting system according to claim 3 is characterized in that, said subscribers feeder access device comprises:
The record updating block; Be used for when because during the disconnection reconnecting of the said subscriber equipment that causes except the adjustment of said power; Said subscriber equipment and said subscribers feeder access device rebulid link after, the initial maximum achievable rate that reports of recording user equipment again before carrying out the adjustment of said power.
5. ADSL2+ connecting system according to claim 3 is characterized in that, said speed is estimated analytical equipment and is integrated in the network management system that is connected with said subscribers feeder access device, or is connected with said network management system through interface.
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