CN101465672A - Method, device and system for reducing crossfire of digital customer line - Google Patents
Method, device and system for reducing crossfire of digital customer line Download PDFInfo
- Publication number
- CN101465672A CN101465672A CNA2007103015085A CN200710301508A CN101465672A CN 101465672 A CN101465672 A CN 101465672A CN A2007103015085 A CNA2007103015085 A CN A2007103015085A CN 200710301508 A CN200710301508 A CN 200710301508A CN 101465672 A CN101465672 A CN 101465672A
- Authority
- CN
- China
- Prior art keywords
- psd
- digital subscriber
- subscriber line
- psdmask
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Telephonic Communication Services (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention discloses a method for reducing digital user line crosstalk, which includes the steps as the followings: the reference power spectral density mask PSDMASK of each group digital user line transceiver is obtained through group optimization method; each group digital user transceiver performs constant envelop water injection towards the own power spectral density PSD to enable the envelop which transmits PSD to be equal to reference PSDMASK; meanwhile, the line rate is equal to the preset target rate. The invention also discloses a digital user line system and a device for reducing line crosstalk. The technical proposal of the invention can inherit the advantages of reference PSDMASK avoidance crosstalk, reduce line transmission power and further reduce the crosstalk of the system.
Description
Technical field
The present invention relates to technical field of access networks, particularly a kind of methods, devices and systems that reduce crossfire of digital customer line.
Background technology
Digital Subscriber Line (Digital Subscriber Line, DSL) technology is a kind of twisted pair telephone that passes through, be unshielded twisted pair (Unshielded Twist Pair, UTP) carry out the high speed transmission technology of transfer of data, comprise ADSL (Asymmetric Digital Subscriber Line) (Asymmetrical Digital Subscriber Line, ADSL), Very-high-speed Digital Subscriber Line (Very high Speed Digital Subscriber Line, VDSL), based on integrated services digital network (Integrated Services Digital Network, ISDN) number of users word line (ISDN Digital Subscriber Line, IDSL) and single-line high speed digital subscriber line (Single-pairHigh-bit-rate Digital Subscriber Line, SHDSL) etc.
In various digital user line technologies (xDSL), except the DSL of baseband transmission such as IDSL and SHDSL, adopt the DSL of passband transmission to utilize frequency multiplexing technique to make DSL and Plain Old Telephone Service (Plain Old Telephone Service, POTS) coexist as with on a pair of twisted-pair feeder, wherein DSL occupies high band, POTS takies the following baseband portion of 4KHz, POTS signal and DSL signal by separate/integrator (Splitter) separates or merges.The xDSL of passband transmission adopts the Discrete multi-tone modulation, and (Discrete Multi-Tone Modulation, DMT) technology is carried out modulation and demodulation.The system that provides multichannel DSL to insert is called the DSL couple in multiplexer, and (DSL Access Multiplexer, DSLAM), its system's annexation schematic diagram as shown in Figure 1.DSLAM120 comprises local side Transmit-Receive Unit 121 and separates/integrator 122, at up direction, local side Transmit-Receive Unit 121 receives and carries out processing and amplifying from the DSL signal of computer 110 and to the signal of being received, the DSL signal after handling is sent to separation/integrator 122; Separation/integrator 122 will carry out integration processing from the DSL signal of local side Transmit-Receive Unit 121 and the POTS signal of telephone terminal 130; Signal after the integration is received by the separation/integrator among the DSLAM 150 of opposite end 151 by the transmission of the UTP 140 of multichannel; Separation/integrator 151 separates the signal that is received, POTS signal wherein is sent to public switched telephone network (Public Switched Telephone Network, PSTN) 160, DSL signal wherein is sent to the Transmit-Receive Unit 152 of DSLAM150, Transmit-Receive Unit 152 carries out the signal of being received being sent to network management system (Network Management System, NMS) 170 after the processing and amplifying again.At the down direction of signal, then signal is according to transmitting with above-mentioned opposite order.
Service cable all comprises many to (25 pairs or more than) twisted-pair feeder basically, on each twisted-pair feeder, may move multiple different business, can produce between mutually when various types of xDSL circuits are worked simultaneously and crosstalk, can be divided into far-end cross talk (FEXT) and near-end cross (NEXT), some circuit can cause performance sharply to descend because crosstalk; When circuit was long, some circuit can not be opened any type of DSL business at all.Crosstalk is that the current DSL modulator-demodulator (as ADSL, VDSL) influences the principal element of user rate in the system.(Dynamic SpectrumManagement DSM) is the method that the management that proposed in recent years distributes power to dynamic spectrum management method, reaches the purpose of eliminating or weakening cross talk effects between each user by dynamically adjusting power, can improve speed widely.
The technical scheme of existing a kind of DSM method is as follows: according to current actual signal to noise ratio allowance and predefined standard signal to noise ratio allowance, obtain current extended power reduction value; Obtain adjusting the adsl line transmission power value according to current extended power reduction value and predefined standard A DSL line transmitting power value, then current adsl line transmission power value is adjusted into described adjustment adsl line transmission power value.This method can reduce the consumed power of drive circuit to greatest extent, has also reduced adjacent lines simultaneously to crosstalking of producing.But there is following deficiency in this method:
It is identical to subdue amplitude for each frequency, and in fact utilizes the information of crosstalking to carry out the frequency adjustment, and it is bigger to cut down amplitude for the frequency of crosstalking big, and it is less that the frequency of crosstalking little is cut down amplitude, so this method can not be evaded to greatest extent and being crosstalked.
Summary of the invention
In view of this, embodiments of the invention propose a kind of method that reduces crossfire of digital customer line, comprise the steps:
Obtain the reference power spectrum density mask PSDMASK of every group of digital subscriber line transceiver with packet-optimized method;
Each is organized digital subscriber line transceiver self transmit power spectral density PSD is carried out permanent envelope water filling, makes the envelope that sends PSD identical with the reference PSDMASK of this group, and the line speed targeted rate that equals to set in advance.
The embodiment of the invention also proposes a kind of digital subscriber line system, comprise Network Management Equipment, local side digital subscriber line transceiver and user side digital subscriber line transceiver, described Network Management Equipment comprises packet-optimized module, is used to adopt packet-optimized method respectively to be organized the reference PSDMASK of digital subscriber line transceiver;
Described local side digital subscriber line transceiver comprises:
Local side water filling information interaction module is used for being handed down to user side digital subscriber line transceiver with reference to PSDMASK with the circuit targeted rate that sets in advance with described;
The permanent envelope water injection module of local side is used for adjusting according to the result from the Bit Allocation in Discrete of described user side digital subscriber line transceiver and power division self transmission PSD;
Described user side digital subscriber line transceiver comprises:
User side water filling information interaction module is used to receive reference PSDMASK and targeted rate from the local side digital subscriber line transceiver;
The permanent envelope water injection module of user side, be used for carrying out Bit Allocation in Discrete and power division, and the result of Bit Allocation in Discrete and power division is sent to described local side digital subscriber line transceiver according to reference PSDMASK and targeted rate that described user side water filling information interaction module is received.
The embodiment of the invention proposes a kind of local side digital subscriber line transceiver again, comprising:
Local side water filling information interaction module is used in initialized channel discovery phase, will be handed down to the user side digital subscriber line transceiver with reference to PSDMASK and targeted rate template;
The permanent envelope water injection module of local side is used for adjusting according to the result from the Bit Allocation in Discrete of user side digital subscriber line transceiver and power division self transmission PSD.
The embodiment of the invention also proposes a kind of user side digital subscriber line transceiver, comprising:
User side water filling information interaction module is used to receive reference PSDMASK and targeted rate template from the local side digital subscriber line transceiver;
The permanent envelope water injection module of user side, be used for carrying out Bit Allocation in Discrete and power division, the result of gained Bit Allocation in Discrete and power division is sent to the local side digital subscriber line transceiver according to reference PSDMASK and targeted rate that described user side water filling information interaction module is received.
As can be seen from the above technical solutions, under the rate requirement according to reference PSDMSDK that optimizes and different user, adjust the transmitted power of circuit, allow the shape that sends PSD and be consistent with reference to the shape of PSDMASK, inherited with reference to PSDMASK and evaded the advantage of crosstalking, reduce line transmitting power simultaneously, further reduced crosstalking of system.
Description of drawings
Fig. 1 is a DSL system architecture schematic diagram;
Fig. 2 is the realization flow of the power water filling of first embodiment of the invention;
The user that Fig. 3 obtains for the final search of first embodiment of the invention sends the schematic diagram that concerns of PSD and PSDMASK and offset;
Fig. 4 is the realization flow of the power water filling of second embodiment of the invention;
Fig. 5 is an embodiment of the invention schematic representation of apparatus.
Embodiment
When the DSL system adopts certain packet-optimized method, behind intelligent power rollback (IPBO), for every group of user calculates corresponding with reference to PSDMASK, evade crosstalking between the different attribute user group as much as possible, be about to this user's group the transmitted power that other user organizes the frequency band that generation crosstalks is more greatly limited, make the crosstalk levels of system reach a lower state.(Management Information Base, MIB) PSDMASK is made as with reference to PSDMASK management information base then.When the user activated in next time, just according to the new MIB PSDMASK that disposes, the row power division.Most of users move under the pattern of speed limit, the new reference PSDMASK transmission PSD required that calculates far above reality, and the signal to noise ratio allowance may be very high, the waste of the power that causes, and system reduced not contribution of amount of crosstalk.The scheme of the embodiment of the invention is, obtains every group of user's reference power spectrum density mask PSDMASK with packet-optimized method; User in each grouping carries out permanent envelope water filling to self transmit power spectral density PSD, makes the envelope that sends PSD identical with the reference PSDMASK of this grouping, and the line speed targeted rate that equals to set in advance.Evade the advantage of crosstalking thereby inherit with reference to PSDMASK, reduce crosstalking of system to greatest extent.Therefore, this technical scheme can both have been optimized system interference guaranteeing that the user reaches under the situation of targeted rate, greatly reduced power consumption again.
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is further elaborated below in conjunction with accompanying drawing.
A, the data or some operational factors that at first provide according to operator, original position, user's line length, electrical length, type of service as DSMLAM are divided into several groups to all circuits, make the circuit in each group have identical characteristic.
B, from each grouping, take out the circuit of representative, set up abstract representative of consumer model, use the method for DSM Level2 (to calculate each the optimization transmitted power of representing circuit spectrum as iteration spectral equalization method (ISB), and calculate corresponding as every group of user with reference to PSDMASK.
These frequency spectrum profiles with reference to PSDMASK have effectively been evaded crosstalking between the different qualities user, make whole total speed and being greatly improved.
C, adopt permanent envelope water-filling method, will send that PSD forms and with reference to the similar shape of PSDMASK.
Because present most of users' business demand is far below the achievable rate of circuit, and each user differs to the demand of speed, ADSL, ADSL2+ mainly operate under the pattern of speed limit, if the PSDMASK of reference must be produced very high signal to noise ratio allowance as transmitted power, waste power also is unfavorable for reducing to crosstalk.Water-filling method is a kind of very general technology among the xDSL, mainly is to be applied to initial phase recently to carry out the bit loading according to noise, and calculates the power division on corresponding each tone.Its core concept is: after the recipient measures the SNR of transmit leg, the SNR of all passband tone is carried out from big to small ordering, gross power is preferentially injected SNR tone preferably, and the power of each tone carrying is no more than the restriction of MASK, assigns up to gross power.If adopt existing power water injection technology, when the power summation of reference PSDMASK during greater than user's gross power restriction, then gross power forms the shape of PSDMASK inadequately; When the power summation of reference PSDMASK during, after then gross power is filled with the shape of whole PSDMASK, also has unnecessary power less than user's gross power restriction.In order to keep shape with reference to PSDMASK, and do not waste power, user's actual gross power, PSDMASK, the targeted rate effectively used set up relation one to one, like this targeted rate that the user is different just corresponding vary in size but the similar PSDMASK1 of shape, form the envelope shape of a PSDMASK, so only need find the PSDMASK1 corresponding to carry out water filling with targeted rate, the transmission PSD that just can obtain wanting, this method is called for short permanent envelope water-filling method.
Therefore, to make the envelope of transmission PSD and keep similar shapes with reference to PSDMASH, and reduction actual transmission power, just can inherit and evade the superiority of crosstalking with reference to PSDMASK, simultaneously satisfying the situation decline low-power consumption of user rate demand, for the line speed stability after the water filling, also need to obtain user's signal to noise ratio allowance in different periods, excursion when different number user reaches the standard grade.
The realization flow of the power water filling of first embodiment of the invention comprises the steps: as shown in Figure 2
Step S101: all circuits are divided into groups, utilize packet-optimized method, calculate the reference PSDMASK of all groups, and it is set to the MIB PSDMASK of circuit in every group respectively;
Step S102: at initial phase, every group of circuit carries out permanent envelope water filling according to MIB PSDMASK and targeted rate, and concrete grammar is:
S1021, each circuit in organizing is set initial offset (offset); Then the PSD of this circuit maximum that may reach is PSDMASK, and the minimum value that may reach is that PSDMASK deducts this side-play amount.
S1022, the suitable offset of search, the similar PSDMASK that generates up to this circuit is just reached the targeted rate of this circuit after filling with water.Specifically, can adopt dichotomy search, comprise the steps:
S1022a: establish PSD
Max=PSDMASK, PSD
Min=PSD-offset;
S1022b: PSD is attempted in order
i=(PSD
Max+ PSD
Min)/2; When carrying out this step first, i=1, later on each carry out this step then i be followed successively by 2,3,4......
S1022c: calculate described PSD
iCorresponding subscriber's line speed;
S1022d: the more current line speed and the targeted rate of this circuit, if current line speed then makes PSD greater than the targeted rate of this circuit
Max=PSD
i, and return step S1022b; If current line speed then makes PSD less than the targeted rate of this circuit
Min=PSD
i, and return step S1022b; If current line speed is identical with the targeted rate of this circuit, then finish search.
S103: according to the excursion of this user's signal to noise ratio allowance that writes down, judge whether the transmission PSD of this circuit can satisfy the requirement of signal to noise ratio allowance, if not, the then whole transmission PSD that promotes this circuit, make its requirement of satisfying the signal to noise ratio allowance, keep the robustness of circuit in traffic state.
Transmission PSD that final search obtains and the relation of PSDMASK and offset as shown in Figure 3, wherein, the curve representation PSDMASK of the top, promptly initial PSD
Max, the curve representation PSDMASK of below deducts the curve that initial offset offset obtains, promptly initial PSD
MinThe transmission PSD that final search obtains is positioned at the centre of these two curves.
In the practical application, can adopt other way of search, for example golden section search etc., the present invention do not limit the concrete mode of search, as long as can search the PSDMASK that just in time reaches targeted rate yet.
The realization flow of the power water filling of second embodiment of the invention comprises the steps: as shown in Figure 4
Step S201: all circuits are divided into groups, utilize certain packet-optimized method, calculate the reference PSDMASK of all groups, and it is set to the MIB PSDMASK of circuit in every group respectively;
Step S202: at initial phase, every group of circuit carries out permanent envelope water filling according to MIB PSDMASK and targeted rate, and concrete grammar is:
S2021, each circuit in organizing is set an initial offset;
S2022, use dichotomizing search offset, generate similar PSDMASK is just reached this circuit after filling with water targeted rate up to this circuit;
Step S203: in professional transmit stage, there is new user to reach the standard grade, when the signal to noise ratio allowance of this circuit descended, (Embedded Operations Channel, EOC) message required all tones all to promote x dB to the opposite end to make the signal to noise ratio allowance recover desired value to send the embedding operation passage.Descend if cpe side detects the signal to noise ratio allowance of downlink business, then the modulator-demodulator by cpe side sends this EOC message to the CO side; Descend if the CO side detects the signal to noise ratio allowance of uplink service, then the modulator-demodulator by the CO side sends this EOC message to cpe side.This requires the modulator-demodulator (Modem) of local side (CO) and customer premises equipment, CPE (CPE) to support that all gi is from lifting process fast.
More than the main distinction of two embodiment be processing mode difference to the signal to noise ratio allowance, first embodiment considers the signal to noise ratio allowance again for search earlier obtains sending PSD; Second embodiment keeps enough signal to noise ratio allowances by the negotiation of local side and user side.
Third embodiment of the invention proposes a kind of digital subscriber line system of permanent envelope power water filling, as shown in Figure 5, comprises Network Management Equipment 510, local side transceiver 520 and user side transceiver 530,
Described Network Management Equipment 510 comprises packet-optimized module 511, the reference PSDMASK that is used to adopt packet-optimized method to obtain every group of user and with described with reference to the corresponding optimization of PSDMASK speed, and be dealt into local side management information base 521 with reference to PSDMASK with described; Gateway device 510 may be managed a plurality of local side transceivers, and shown in Figure 5 only is example, does not comprise all local side transceivers.Network Management Equipment 510 can also be carried out other webmaster operation, and these operations are not within the scope that the present invention considers.
A plurality of local side transceivers are shared a local side management information base 521, and the reference PSDMASK that is used for being received stores with the form of template; Local side management information base 521 has also been stored each user's of operator's setting targeted rate.
Described local side transceiver 520 comprises:
Local side water filling information interaction module 522 is used in initialized channel discovery phase, and reference PSDMASK in the local side management information base 521 and targeted rate template are handed down to user side transceiver 530;
The permanent envelope water injection module 523 of local side is used for the transmission PSD that adjusts self according to from the Bit Allocation in Discrete table and the power gain table of user side transceiver 530;
Described user side transceiver 530 comprises:
User side water filling information interaction module 531 is used to receive reference PSDMASK and targeted rate template from local side transceiver 520;
The permanent envelope water injection module 532 of user side, be used for carrying out Bit Allocation in Discrete and power division, gained Bit Allocation in Discrete table and power gain table are sent to local side transceiver 520 according to reference PSDMASK and targeted rate that described user side water filling information interaction module 531 is received.
Described local side transceiver 520 further comprises:
Local side signal to noise ratio allowance control module 524 is used for the transmission PSD that the permanent envelope water injection module 523 of local side is adjusted is adjusted, and makes described transmission PSD can guarantee the requirement of signal to noise ratio allowance.
Described signal to noise ratio allowance control module 524 comprises:
Detecting unit, whether the signal to noise ratio allowance that is used to detect the signal of being received descends;
Notification unit is used for when described detecting unit detects the decline of signal to noise ratio allowance, and notice opposite end transceiver promotes transmitted power;
Adjustment unit is used for promoting the transmitted power of signal according to the notice from the opposite end transceiver.
The present invention program can rate requirement according to reference PSDMSDK that optimizes and different user under, adjust the transmitted power of circuit, allow the shape that sends PSD and be consistent with reference to the shape of PSDMASK, inherited with reference to PSDMASK and evaded the advantage of crosstalking, reduce line transmitting power simultaneously, further reduced crosstalking of system.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1, a kind of method that reduces crossfire of digital customer line is characterized in that, comprises the steps:
Obtain the reference power spectrum density mask PSDMASK of every group of digital subscriber line transceiver with packet-optimized method;
Each is organized digital subscriber line transceiver self transmit power spectral density PSD is carried out permanent envelope water filling, makes the envelope that sends PSD identical with the reference PSDMASK of this group, and the line speed targeted rate that equals to set in advance.
2, method according to claim 1 is characterized in that, the described digital subscriber line transceiver of respectively organizing carries out permanent envelope water filling to self transmit power spectral density PSD and comprises:
Set initial offset offset, the maximum PSD that described transmission PSD can be reached
MaxEqual the reference PSDMASK of this group, the minimum value PSD that described transmission PSD can reach
MinThe reference PSDMASK that equals this group deducts described initial offset offset;
At PSD
MinTo PSD
MaxSpan in search send the value of PSD, if the line speed of the transmission PSD correspondence that searches equals the described targeted rate that sets in advance, then carry out permanent envelope water filling according to the transmission PSD that searches.
3, method according to claim 2 is characterized in that, and is described at PSD
MinTo PSD
MaxSpan in search send the value of PSD, if the line speed of the transmission PSD correspondence that searches equals the described targeted rate that sets in advance, then carry out permanent envelope water filling and comprise according to the transmission PSD that searches:
Current trial PSD is set
i=(PSD
Max+ PSD
Min)/2, i is a number of attempt;
Calculate described PSD
iCorresponding line speed;
The more current line speed and the targeted rate of this circuit are if current line speed then makes PSD greater than the targeted rate of this circuit
Max=PSD
i, and return the described current trial PSD that is provided with
iStep; If current line speed then makes PSD less than the targeted rate of this circuit
Min=PSD
i, and return the described current trial PSD that is provided with
iStep; Through the repeated attempt of above-mentioned steps, if current line speed is identical with the targeted rate of this circuit, then according to current trial PSD
iCarry out permanent envelope water filling.
According to each described method of claim 1 to 3, it is characterized in that 4, the described digital subscriber line transceiver of respectively organizing carries out further comprising after the permanent envelope water filling to self transmit power spectral density PSD:
Judge whether the transmission PSD of this digital subscriber line transceiver can satisfy the requirement of signal to noise ratio allowance, if not, then improve the transmission PSD of this digital subscriber line transceiver, make it satisfy the requirement of signal to noise ratio allowance.
5, method according to claim 4 is characterized in that, the described digital subscriber line transceiver of respectively organizing carries out further comprising after the permanent envelope water filling to self transmission PSD:
Local side or user side digital subscriber line transceiver detect the professional signal to noise ratio allowance that receives, and descend if detect the signal to noise ratio allowance, then send message to the opposite end and require the transmitted power of opposite end to promote, and make the signal to noise ratio allowance recover desired value;
Receive that an end of described message promotes the transmitted power of self.
6, a kind of digital subscriber line system, comprise Network Management Equipment, local side digital subscriber line transceiver and user side digital subscriber line transceiver, it is characterized in that, described Network Management Equipment comprises packet-optimized module, is used to adopt packet-optimized method respectively to be organized the reference PSDMASK of digital subscriber line transceiver;
Described local side digital subscriber line transceiver comprises:
Local side water filling information interaction module is used for being handed down to user side digital subscriber line transceiver with reference to PSDMASK with the circuit targeted rate that sets in advance with described;
The permanent envelope water injection module of local side is used for adjusting according to the result from the Bit Allocation in Discrete of described user side digital subscriber line transceiver and power division self transmission PSD;
Described user side digital subscriber line transceiver comprises:
User side water filling information interaction module is used to receive reference PSDMASK and targeted rate from the local side digital subscriber line transceiver;
The permanent envelope water injection module of user side, be used for carrying out Bit Allocation in Discrete and power division, and the result of Bit Allocation in Discrete and power division is sent to described local side digital subscriber line transceiver according to reference PSDMASK and targeted rate that described user side water filling information interaction module is received.
7, digital subscriber line system according to claim 6 is characterized in that, this system further comprises: the local side management information base, be used for the reference PSDMASK that Network Management Equipment generates is stored with the form of template, and storage circuit targeted rate.
8, digital subscriber line system according to claim 6 is characterized in that, described local side digital subscriber line transceiver further comprises:
Signal to noise ratio allowance control module is used for the transmission PSD that the permanent envelope water injection module of local side is adjusted is adjusted, and makes described transmission PSD can guarantee the requirement of signal to noise ratio allowance.
9, digital subscriber line system according to claim 8 is characterized in that, described signal to noise ratio allowance control module comprises:
Detecting unit, whether the signal to noise ratio allowance that is used to detect the signal of being received descends;
Notification unit is used for when described detecting unit detects the decline of signal to noise ratio allowance, and notice user side digital subscriber line transceiver promotes transmitted power;
Adjustment unit is used for promoting the transmitted power of signal according to the notice from the user side digital subscriber line transceiver.
10, a kind of local side digital subscriber line transceiver is characterized in that, comprising:
Local side water filling information interaction module is used in initialized channel discovery phase, will be handed down to the user side digital subscriber line transceiver with reference to PSDMASK and targeted rate template;
The permanent envelope water injection module of local side is used for adjusting according to the result from the Bit Allocation in Discrete of user side digital subscriber line transceiver and power division self transmission PSD.
11, local side digital subscriber line transceiver according to claim 10 is characterized in that, described local side digital subscriber line transceiver further comprises:
Signal to noise ratio allowance control module is used for the transmission PSD that the permanent envelope water injection module of local side is adjusted is adjusted, and makes described transmission PSD can guarantee the requirement of signal to noise ratio allowance.
12, digital subscriber line system according to claim 11 is characterized in that, described signal to noise ratio allowance control module comprises:
Detecting unit, whether the signal to noise ratio allowance that is used to detect the signal of being received descends;
Notification unit is used for when described detecting unit detects the decline of signal to noise ratio allowance, and notice user side digital subscriber line transceiver promotes transmitted power;
Adjustment unit is used for promoting the transmitted power of signal according to the notice from the user side digital subscriber line transceiver.
13, a kind of user side digital subscriber line transceiver is characterized in that, comprising:
User side water filling information interaction module is used to receive reference PSDMASK and targeted rate template from the local side digital subscriber line transceiver;
The permanent envelope water injection module of user side, be used for carrying out Bit Allocation in Discrete and power division, the result of gained Bit Allocation in Discrete and power division is sent to the local side digital subscriber line transceiver according to reference PSDMASK and targeted rate that described user side water filling information interaction module is received.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103015085A CN101465672B (en) | 2007-12-21 | 2007-12-21 | Method, device and system for reducing crossfire of digital customer line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103015085A CN101465672B (en) | 2007-12-21 | 2007-12-21 | Method, device and system for reducing crossfire of digital customer line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101465672A true CN101465672A (en) | 2009-06-24 |
| CN101465672B CN101465672B (en) | 2012-11-21 |
Family
ID=40806057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007103015085A Expired - Fee Related CN101465672B (en) | 2007-12-21 | 2007-12-21 | Method, device and system for reducing crossfire of digital customer line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101465672B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656555B (en) * | 2009-09-25 | 2012-09-05 | 中国电信股份有限公司 | ADSL2+ access system and velocity pre-estimating method thereof |
| CN102742172A (en) * | 2011-04-14 | 2012-10-17 | 华为技术有限公司 | Method, device and system for grouping line pairs |
| CN103095337A (en) * | 2011-10-28 | 2013-05-08 | 中兴通讯股份有限公司 | Method, device and local side of improving stability of crosstalk elimination |
| CN103828253A (en) * | 2011-09-23 | 2014-05-28 | 阿尔卡特朗讯 | Power adaptation avoidance during crosstalk measurements |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1156176C (en) * | 2000-12-07 | 2004-06-30 | 华为技术有限公司 | Channel equalizing method in base band processing for mobile communication system |
| US7991122B2 (en) * | 2005-06-02 | 2011-08-02 | Adaptive Spectrum And Signal Alignment, Inc. | DSL system training |
-
2007
- 2007-12-21 CN CN2007103015085A patent/CN101465672B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656555B (en) * | 2009-09-25 | 2012-09-05 | 中国电信股份有限公司 | ADSL2+ access system and velocity pre-estimating method thereof |
| CN102742172A (en) * | 2011-04-14 | 2012-10-17 | 华为技术有限公司 | Method, device and system for grouping line pairs |
| CN103828253A (en) * | 2011-09-23 | 2014-05-28 | 阿尔卡特朗讯 | Power adaptation avoidance during crosstalk measurements |
| US9374251B2 (en) | 2011-09-23 | 2016-06-21 | Alcatel Lucent | Power adaptation avoidance during crosstalk measurements |
| CN103828253B (en) * | 2011-09-23 | 2017-03-29 | 阿尔卡特朗讯 | Power adjustment during crosstalk is measured is avoided |
| CN103095337A (en) * | 2011-10-28 | 2013-05-08 | 中兴通讯股份有限公司 | Method, device and local side of improving stability of crosstalk elimination |
| CN103095337B (en) * | 2011-10-28 | 2016-08-03 | 中兴通讯股份有限公司 | Improve and eliminate stability of crosstalk method, device and local side |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101465672B (en) | 2012-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101035175B (en) | Method and device for saving the power of the digital user line | |
| Song et al. | Dynamic spectrum management for next-generation DSL systems | |
| CN1753442B (en) | Multi-carrier modem transmitter with controlled transmit signal quality degradation | |
| CN101174855B (en) | Spectrum management method and apparatus | |
| CN101399575B (en) | Method and device for controlling sending power of DSL line | |
| CN101083553A (en) | XDSL up-downlink sharing frequency dynamic spectrum managerial approach and apparatus | |
| CN1716989B (en) | System and method of upstream signal power cutback | |
| CN103004099B (en) | Method, apparatus and system for reducing interference in digital subscriber line | |
| CN101047459B (en) | Method for dynamic managing xDSL specturm and its device | |
| CN101610102A (en) | A kind of mthods, systems and devices of optimizing power | |
| CN103947125A (en) | Optimal downstream power back-off for digital subscriber lines | |
| CN100367721C (en) | Method and system for DSL power saving | |
| CN101465672B (en) | Method, device and system for reducing crossfire of digital customer line | |
| CN101663854B (en) | Device and method for power reduction for digital subscriber line | |
| US9258790B2 (en) | Dynamic power spectrum management method, spectrum optimization system and client device | |
| CN101453243B (en) | Method, equipment and system for on-line reconfiguration control | |
| CN101523753A (en) | System for emergency rate adjustment | |
| KR20010111266A (en) | Apparatus and method of tone allocation in digital subscriber line systems | |
| CN101237398B (en) | Method and system for improving VDSL stability | |
| CN101729094B (en) | Uplink power decreasing method, device and system in digital subscriber lines | |
| WO2002011369A1 (en) | Apparatus and method of loop and rate dependent power cutback | |
| CN101159509B (en) | Power management method, system and equipment | |
| CN100493058C (en) | Discrete multi-audio frequency modulating system optimal power distributing comprehensive bit position loading method | |
| CN101119134B (en) | Method for controlling wire communication quality | |
| Gaikwad et al. | Optimal Transmit Spectra for HDSL2 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20151221 |
|
| EXPY | Termination of patent right or utility model |