CN101222244B - Crosstalk eliminating method and device - Google Patents
Crosstalk eliminating method and device Download PDFInfo
- Publication number
- CN101222244B CN101222244B CN2008100041754A CN200810004175A CN101222244B CN 101222244 B CN101222244 B CN 101222244B CN 2008100041754 A CN2008100041754 A CN 2008100041754A CN 200810004175 A CN200810004175 A CN 200810004175A CN 101222244 B CN101222244 B CN 101222244B
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- Prior art keywords
- vdsl2
- port
- connection mode
- power
- adsl
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0066—Requirements on out-of-channel emissions
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/32—Reducing cross-talk, e.g. by compensating
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
- H04M3/302—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs
- H04M3/304—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs and using xDSL modems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/34—Testing for cross-talk
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephonic Communication Services (AREA)
Abstract
The invention discloses a method for eliminating crosstalk, which comprises the following steps: step S202: remote VDSL2 equipment queries the connection mode of the port of the VDSL2 and records the connection mode as the power control parameter of the port of the VDSL2; step S204: according to the recorded power control parameter, the power transmitting template of a corresponding VDSL2 port is determined; step S206: according to the determined power transmitting template, the power transmitting template of the port adopting ADSL/2/2+ connection mode is set. In addition, the invention also provides a crosstalk eliminating device. The invention can reduce mutual crosstalk when the VDSL2 equipment is compatible with an ADSL/2/2+ subscriber terminal, thereby maintaining spectral compatibility.
Description
Technical field
The present invention relates to the communications field, and especially, relate to crosstalk eliminating method and device under the compatible environment of VDSL2 and ADSL.
Background technology
At present, the VDSL2 of up-to-date rise is the comprehensive expression of person of xDSL technology.Consider that ADSL/2/2+ is widely used, and the application of VDSL2 is also in the starting stage, so the local side apparatus of VDSL2 must compatible a large amount of ADSL/2/2+ terminals that exist.The deployment trend of broadband access network is progressively to disperse to move down.
Fig. 1 shows following deployment mode.Because new VDSL2 equipment can provide higher bandwidth in short distance (in the 1km), therefore, can it be deployed in the place near the user usually.On the one hand, have and insert new user, directly use VDSL2 professional; On the other hand, the ADSL user that in the scope that equipment covers, also can have been friends in the past, new VDSL2 equipment also must compatible old ADSL user.Therefore, the local side of VDSL2 is wanted to discern type of user terminal automatically, connects to set up ADSL or VDSL2.
Yet there is the interference problem between the equipment in this way.Particularly; Is example with configure ADSL 2+Annex A commonly used under this pattern with VDSL2 profile 17a or 12aAnnex B 988, DS2 frequency range (138KHz is to the 3.75MHz) coincidence of the band downlink of ADSL2+Annex A (138KHz is to 2.2MHz) and VDSL2, and ADSL2+Annex A can reach-40dBm in that band downlink PSD is the highest; And VDSL2 profile17a Annex B 988 has only-60dBm in this frequency range PSD maximum; At this moment, if there are two ports to meet ADSL and VDSL2 user respectively, set up ADSL2+ respectively according to above-mentioned condition and be connected with VDSL2; And two subscriber's lines are that adjacent lines is right; Use the circuit of ADSL2+ will produce bigger interference so, under the situation of serious interference, will cause VDSL2 user normally not use the circuit that uses VDSL2.
Under above-mentioned situation, maybe be in the VDSL2 of RT business to very strong the crosstalking of the professional generation of the ADSL/2/2+ of central office (CO) side.When serious, can make the CO side to use.For the VDSL2 technology, can use DPBO to eliminate this influence.But the mechanism that ADSL/2/2+ does not have this elimination to disturb is so must influence the application of the ADSL/2/2+ of CO under this condition.That is to say; Use if want to guarantee the end of all terminal equipments, just need when RT Application V DSL2 equipment, solve on the down direction ADSL/2/2+ port RT is held the VDSL2 port of digital subscriber line access multiplex (DSLAM) and the influence that CO holds the ADSL/2/2+ port of DSLAM.
Yet, the present technical scheme that proposes to eliminate this interference as yet.
Summary of the invention
Consider the problems referred to above and make the present invention that for this reason, main purpose of the present invention is to provide a kind of crosstalking to eliminate mechanism, to eliminate crosstalking of being produced under the compatible environment of VDSL2 and ADSL.
According to embodiments of the invention, a kind of crosstalk eliminating method is provided.
This method comprises: step S202; The connection mode of its port of far-end VDSL2 equipment query; And the record connection mode is the power contorl parameters of the port of VDSL2; Wherein, power contorl parameters is that connection mode is the power contorl parameters of the control function of power that is provided with of the port of VDSL2, and the connection mode of the port of VDSL2 equipment query comprises: the connection mode after port connects, by the connection mode of NMS appointment; Step S204 confirms the power emission template of corresponding VDSL2 port according to the power contorl parameters of record; And step S206; The connection mode that VDSL2 equipment is set according to the power emission template of the VDSL2 port of confirming is the power emission template of the port of ADSL/2/2+; Wherein, connection mode be that the power emission template of the port of ADSL/2/2+ is set to less than connection mode is the power emission template of the port of VDSL2.
And, having under the situation of port that a plurality of connection modes are VDSL2 at VDSL2 equipment, connection mode is that the power emission template of the port of ADSL/2/2+ is set to less than connection mode is the minimum power emission template of a plurality of ports of VDSL2.
According to another embodiment of the present invention, a kind of cross-interference elimination device is provided.
This device comprises: the power contorl parameters logging modle; Be used to inquire about the connection mode of the port of far-end VDSL2 equipment; And the record connection mode is the power contorl parameters of the port of VDSL2; Wherein, power contorl parameters is that connection mode is the power contorl parameters of the control function of power that is provided with of the port of VDSL2, and the connection mode of the port of VDSL2 equipment query comprises: the connection mode after port connects, by the connection mode of NMS appointment; Power emission template determination module is used for according to the power emission template of being confirmed corresponding VDSL2 port by the power contorl parameters of power contorl parameters logging modle record; And the power emission template is provided with module; Be used for the power emission template that connection mode is the port of ADSL/2/2+ being set according to the power emission template of the VDSL2 port of confirming by power emission template determination module; Wherein, connection mode be that the power emission template of the port of ADSL/2/2+ is set to less than connection mode is the power emission template of the port of VDSL2.
And; Have under the situation of port that a plurality of connection modes are VDSL2 at VDSL2 equipment, it be that the power emission template of the port of ADSL/2/2+ is set to less than connection mode is the minimum power emission template of a plurality of ports of VDSL2 that the power emission template is provided with the module connection mode.
Through technique scheme of the present invention, can when VDSL2 hardware compatibility ADSL/2/2+ user terminal, reduce mutual crosstalking, thereby keep spectral compatibility property.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the sketch map according to the processing scene of the crosstalk eliminating method of the inventive method embodiment;
Fig. 2 is the flow chart according to the crosstalk eliminating method of the inventive method embodiment; And
Fig. 3 is the block diagram according to the cross-interference elimination device of the inventive method embodiment.
Embodiment
Method embodiment
In the present embodiment, a kind of crosstalk eliminating method is provided.
As shown in Figure 2, comprise according to the crosstalk eliminating method of present embodiment: step S202, the connection mode of its port of far-end VDSL2 equipment query, and the record connection mode is the power contorl parameters of the port of VDSL2; Step S204 confirms power emission (PSD) template of corresponding VDSL2 port according to the power contorl parameters of record; And step S206, the connection mode that VDSL2 equipment is set according to the power emission template of the VDSL2 port of confirming is the power emission template of the port of ADSL/2/2+.
Wherein, in step S206, connection mode is that the power emission template of the port of ADSL/2/2+ is set to less than connection mode is the power emission template of the port of VDSL2.
And, having under the situation of port that a plurality of connection modes are VDSL2 at VDSL2 equipment, connection mode is that the power emission template of the port of ADSL/2/2+ is set to less than connection mode is the minimum power emission template of a plurality of ports of VDSL2.
In addition, the connection mode of the port of VDSL2 equipment query comprises: the connection mode after port connects, by the connection mode of NMS appointment.Power contorl parameters is that connection mode is the power contorl parameters of the control function of power (for example, descending power limitation function (DPBO function)) that is provided with of the port of VDSL2.
When practical application, concrete steps are following:
Step 1, the inquiry of DSLAM port information:
The connection mode of far-end (RT end) each port of VDSL2 equipment records (promptly; The type of the terminal equipment that connects); This connection mode is the connection mode after each port connects; Perhaps also can be connection mode, for example, be appointed as VDSL2 pattern or ADSL/2/2+ pattern through the webmaster appointment;
Whether each VDSL2 port of RT end VDSL2 equipment inspection has disposed DPBO function or similar functions; If just write down the DPBO parameter;
Step 2, the frequency spectrum adjustment of ADSL/2/2+
According to the information (DPBO parameter) that step 1 obtains, confirm the minimum emission PSD masterplate of VDSL2 port.The PSD masterplate of ADSL/2/2+ should be lower than the minimum emission PSD masterplate that is determined.
To be that example is described the present invention with scene as shown in Figure 1 below.
In Fig. 1, suppose that line 1 (connecting 1) length is 3km, the length of line2 (connecting 2) and line3 (being connected 3) is 800m.Line1 is CO end DSLAM and being connected of ADSL/2/2+ user, and is configured to G.992.3 Annex A.Connecting 2 is RT end DSLAM and being connected of VDSL2 user, and is configured to profile 17a Annex B 998.Connecting 3 is RT end DSLAM and ADSL/2/2+ user, G.992.3 Annex A.3 lines that connect to use are to being that adjacent lines is right, therefore have each other in the 2.2MHz at 138KHz and crosstalk.At this moment, if the descending PSD of control connection 3 not, connect so 1 be connected 2 and may not normally use.
Step 1:
RT end DSLAM obtains the PSD masterplate of the configuration profile 17a Annex B 998 of connection 2;
RT end DSLAM obtains to connect 1 for fear of disturbing, and connect 2 and must use DPBO, and RT end DSLAM record connects the DPBO PSD masterplate of 2 configurations.
Step 2:
RT end DSLAM confirms to connect 3 PSD masterplate according to the information of step 1, connects 3 downlink PSD, can not surpass above-mentioned definite PSD masterplate (connecting 2 PSD masterplate).The PSD control of control connection 3 can be adopted custom PSD function.According to the masterplate that from step 1, obtains, come to connect 3 masterplate for specifying.
Device embodiment
In the present embodiment, a kind of cross-interference elimination device is provided.
As shown in Figure 3, comprise according to the cross-interference elimination device of present embodiment: power contorl parameters logging modle 302 be used to inquire about the connection mode of the port of far-end VDSL2 equipment, and the record connection mode is the power contorl parameters of the port of VDSL2; Power emission template determination module 304 is used for according to the power emission template of being confirmed corresponding VDSL2 port by the power contorl parameters of power contorl parameters logging modle 302 records; And the power emission template is provided with module 306, is used for according to the power emission template of the VDSL2 port of being confirmed by power emission template determination module 304 the power emission template that connection mode is the port of ADSL/2/2+ being set.
Wherein, module 306 connection modes are set is that the power emission template of the port of ADSL/2/2+ is set to less than connection mode to the power emission template is the power emission template of the port of VDSL2.
And; Have under the situation of port that a plurality of connection modes are VDSL2 at VDSL2 equipment, it be that the power emission template of the port of ADSL/2/2+ is set to less than connection mode is the minimum power emission template of a plurality of ports of VDSL2 that the power emission template is provided with module 306 connection modes.
In addition, the connection mode of the port of VDSL2 equipment query comprises: the connection mode after port connects, by the connection mode of NMS appointment.Power contorl parameters is that connection mode is the power contorl parameters of the control function of power that is provided with of the port of VDSL2.
In sum,, can when VDSL2 hardware compatibility ADSL/2/2+ user terminal, reduce mutual crosstalking, thereby keep spectral compatibility property by means of technical scheme of the present invention.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a crosstalk eliminating method is used for the compatible environment of VDSL2 and ADSL, it is characterized in that said method comprises:
Step S202; The connection mode of its port of far-end VDSL2 equipment query; And the record connection mode is the power contorl parameters of the port of VDSL2; Wherein, said power contorl parameters is that said connection mode is the power contorl parameters of the control function of power that is provided with of the port of VDSL2, and the connection mode of the port of said VDSL2 equipment query comprises: the connection mode after said port connects, by the connection mode of NMS appointment;
Step S204 confirms the power emission template of corresponding VDSL2 port according to the said power contorl parameters of record; And
Step S206; The connection mode that said VDSL2 equipment is set according to the power emission template of the VDSL2 port of confirming is the power emission template of the port of ADSL/2/2+; Wherein, said connection mode be that the power emission template of the port of ADSL/2/2+ is set to less than said connection mode is the power emission template of the port of VDSL2.
2. crosstalk eliminating method according to claim 1; It is characterized in that; Have under the situation of port that a plurality of connection modes are VDSL2 at said VDSL2 equipment, said connection mode is that the power emission template of the port of ADSL/2/2+ is set to less than said connection mode is the minimum power emission template of a plurality of ports of VDSL2.
3. a cross-interference elimination device is used for the compatible environment of VDSL2 and ADSL, it is characterized in that said device comprises:
The power contorl parameters logging modle; Be used to inquire about the connection mode of the port of far-end VDSL2 equipment; And the record connection mode is the power contorl parameters of the port of VDSL2; Wherein, said power contorl parameters is that said connection mode is the power contorl parameters of the control function of power that is provided with of the port of VDSL2, and the connection mode of the port of said VDSL2 equipment query comprises: the connection mode after said port connects, by the connection mode of NMS appointment;
Power emission template determination module is used for according to the power emission template of being confirmed corresponding VDSL2 port by the said power contorl parameters of said power contorl parameters logging modle record; And
The power emission template is provided with module; Be used for the power emission template that connection mode is the port of ADSL/2/2+ being set according to the power emission template of the VDSL2 port of confirming by said power emission template determination module; Wherein, said connection mode be that the power emission template of the port of ADSL/2/2+ is set to less than said connection mode is the power emission template of the port of VDSL2.
4. cross-interference elimination device according to claim 3; It is characterized in that; Have under the situation of port that a plurality of connection modes are VDSL2 at said VDSL2 equipment, it be that the power emission template of the port of ADSL/2/2+ is set to less than said connection mode is the minimum power emission template of a plurality of ports of VDSL2 that said power emission template is provided with the said connection mode of module.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100041754A CN101222244B (en) | 2008-01-23 | 2008-01-23 | Crosstalk eliminating method and device |
| PCT/CN2008/073643 WO2009094885A1 (en) | 2008-01-23 | 2008-12-22 | Crosstalk eliminating method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100041754A CN101222244B (en) | 2008-01-23 | 2008-01-23 | Crosstalk eliminating method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101222244A CN101222244A (en) | 2008-07-16 |
| CN101222244B true CN101222244B (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100041754A Expired - Fee Related CN101222244B (en) | 2008-01-23 | 2008-01-23 | Crosstalk eliminating method and device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101222244B (en) |
| WO (1) | WO2009094885A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222244B (en) * | 2008-01-23 | 2012-05-23 | 中兴通讯股份有限公司 | Crosstalk eliminating method and device |
| CN101924964B (en) * | 2009-06-11 | 2013-08-07 | 华为技术有限公司 | Data processing method, system and equipment for DSL (Digital Subscriber Line) |
| US20110007623A1 (en) * | 2009-07-10 | 2011-01-13 | Futurewei Technologies, Inc. | Method for Estimating the Strength of a Crosstalk Channel |
| KR20140007919A (en) * | 2011-02-23 | 2014-01-20 | 이카노스 커뮤니케이션스, 인크. | System and method for partitioning dsl vector cancellation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060268966A1 (en) * | 2005-05-09 | 2006-11-30 | Adaptive Spectrum And Signal Alignment, Inc. | Phantom use in DSL systems |
| WO2007008836A2 (en) * | 2005-07-10 | 2007-01-18 | Adaptive Spectrum And Signal Alignment, Inc. | Adaptive margin and band control |
| CN1965498A (en) * | 2004-05-18 | 2007-05-16 | 适应性频谱和信号校正股份有限公司 | FEXT determination system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100512251C (en) * | 2005-02-06 | 2009-07-08 | 华为技术有限公司 | Method for reducing ADSL line transmitting power |
| CN1866938B (en) * | 2005-09-21 | 2010-08-18 | 华为技术有限公司 | Self-adaptive power adjusting process and apparatus based on reducing DSL circuit crosstalk |
| CN100546325C (en) * | 2005-11-10 | 2009-09-30 | 华为技术有限公司 | Asymmetric digital subscriber line and Very-high-speed Digital Subscriber Line are mixed the method that inserts |
| CN101222244B (en) * | 2008-01-23 | 2012-05-23 | 中兴通讯股份有限公司 | Crosstalk eliminating method and device |
-
2008
- 2008-01-23 CN CN2008100041754A patent/CN101222244B/en not_active Expired - Fee Related
- 2008-12-22 WO PCT/CN2008/073643 patent/WO2009094885A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1965498A (en) * | 2004-05-18 | 2007-05-16 | 适应性频谱和信号校正股份有限公司 | FEXT determination system |
| US20060268966A1 (en) * | 2005-05-09 | 2006-11-30 | Adaptive Spectrum And Signal Alignment, Inc. | Phantom use in DSL systems |
| WO2007008836A2 (en) * | 2005-07-10 | 2007-01-18 | Adaptive Spectrum And Signal Alignment, Inc. | Adaptive margin and band control |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009094885A1 (en) | 2009-08-06 |
| CN101222244A (en) | 2008-07-16 |
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