CN102308486A - Method and apparatus for generating expansion channel - Google Patents
Method and apparatus for generating expansion channel Download PDFInfo
- Publication number
- CN102308486A CN102308486A CN2011800013716A CN201180001371A CN102308486A CN 102308486 A CN102308486 A CN 102308486A CN 2011800013716 A CN2011800013716 A CN 2011800013716A CN 201180001371 A CN201180001371 A CN 201180001371A CN 102308486 A CN102308486 A CN 102308486A
- Authority
- CN
- China
- Prior art keywords
- channel
- extended channel
- extended
- twisted
- generate
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
Abstract
The invention discloses a method and an apparatus for generating an expansion channel. The method comprises the steps of using twisted-pair wire channels in the amount of n, and generating expansion channels in the amount of m by means of different schemes. Each scheme of the different schemes generates expansion channels in the amount of m, wherein n is more than 2, and m is no more than (n-1). The expansion channel is divided into a non-cascade expansion channel and a cascade expansion channel. The method comprises the steps of respectively acquiring the total performance parameter value of expansion channels in the amount of m generated in different schemes; making a comparison of the total performance parameter values of expansion channels in the amount of m generated in different schemes and selecting a scheme corresponding to a non minimum value P. With the invention, a better or best expansion channel scheme can be selected in an intelligent manner, and thereby the expansion channel can have a better performance and SuperMIMO can have a better performance.
Description
Technical field
The present invention relates to the data communication field, specifically, relate to the method and apparatus that generates extended channel.
Background technology
Twisted-pair feeder is that the lead by two mutually insulateds is intertwined mutually according to certain specification and a kind of general distribution processed, belongs to the communication network transmission medium.Twisted-pair feeder is divided into Shielded Twisted Pair STP (Shielded Twisted Pair) and unshielded twisted pair UTP (Unshielded Twisted Pair).UTP is widely used in Etherloop and the telephone wire, and a kind of UTP that is made up of the transmission line of four pairs of different colours is usually used in the Ethernet data transmission.In trunk circuit, generally (as 25 pairs, 100 pairs or more) are combined the composition cable by many UTP lines.The technology that transmits signal based on UTP is varied; Wherein, There have been application foundation widely in Asymmetrical Digital Subscriber Line ADSL (Asymmetric Digital Subscriber Line), high bitrate digital subscriber line road HDSL (High bit Rate DSL), superelevation speed digital subscriber line VDSL technology such as (Very High Speed Digital Subscriber Line).For convenience, technology such as ADSL, HDSL and VDSL are referred to as the xDSL technology.
Tradition is come transmission signals to UTP as N channel with N usually based on the xDSL technology that UTP transmits signal.Along with further developing of high speed business, the traffic capacity of xDSL technology, with and the access rate that provides, can not satisfy user's demand gradually.For this reason, prior art has proposed a kind of method of extended channel, and the mode that adopts the series connection common mode expands N-1 channel on N the channel basis of N to UTP, and it is individual to make channel quantity after the expansion reach 2N-1.This method expands a new channel between per two couples of adjacent UTP; The transmission means of original channel is constant; Still use the difference DM (Differential Mode) of this channel to come transmission signals; Transmission signals on the extended channel then is divided into two parts; The common mode CM (Common Mode) that use to generate two original channels of this extended channel respectively transmits, and at receiving terminal the common-mode signal on these two channels is done the be expanded signal of channel of difference.
Many in a bundle cable between the twisted-pair feeder, and all exist between twisted-pair feeder channel and the extended channel and crosstalk, crosstalking to make the performance of xDSL reduce greatly.Can use the technology for eliminating of crosstalking, with the elimination of crosstalking of interchannel.Existing vector quantization Vector technology can be eliminated crosstalking of interchannel, and the xDSL performance is promoted greatly.
For higher access rate is provided to the user; Usually will be from P1 to PN many twisted-pair feeder resource be bound; Utilize a plurality of transceivers to unite and receive and send; Combined transceiving cooperates above-mentioned channel expansion technology; And the technology for eliminating of crosstalking, just formed super multiple-input and multiple-output Digital Subscriber Line SuperMIMODSL (Super Multiple-input and Multiple-output Digital Subscriber Line) transmission system as shown in Figure 1.
Central office CO (Central Office) access device Digital Subscriber Line Access Multiplexer DSLAM (Digital Subscriber Line Access Multiplexer) to the connection of user side equipment CPE (Customer Premises Equipment) as shown in Figure 2.DSLAM is connected to main-frame MDF (Main Distribution Frame) through cable, and MDF is last to be had splicing ear to switch to make local side apparatus connect the not collinear right of main cable.Main cable generally is made up of a lot of bundles of cables, 100 pairs every bundle even more twisted-pair feeders, and therefore, MDF generally is connected with several thousand even up to ten thousand to subscribers feeder, i.e. twisted-pair feeder.The scale of distribution cable is littler than main cable, hundreds of is generally arranged to subscribers feeder, and distribution cable is connected with main cable through cross-connecting box, and same, cross-connecting box also has splicing ear can switch the order of connection.At last, subscribers feeder arrives ustomer premises access equipment CPE through junction box.If use the SuperMIMO technology, need 2 lines at least to arriving user side.
Because MDF and cross-connecting box all have splicing ear to switch, thus DSLAM to user side pass through which to subscribers feeder can select, can be different.Generally speaking, before activating the service, operator has just accomplished being connected of MDF and cross-connecting box, uses which user just to confirm activating the service, and can use these subscribers feeders of having confirmed to carry out channel expansion.If confirm subscribers feeder line that the user will use to before, can from subscribers feeder, select the subscribers feeder that will be used more than the subscribers feeder logarithm that will use, then, confirm that based on these subscribers feeders that will use carry out channel expansion.
Prior art provides the method for extended channel in the SuperMIMO system; But; Based on the twisted-pair feeder channel channel is expanded channel expansion scheme with the extended channel that obtains requirement and type if not unique; Different extended channel schemes have different performances, and adopting the bad extended channel of performance to generate scheme can impact the service quality that offers the terminal use.
Summary of the invention
In the SuperMIMO system, adopt the bad extended channel of performance to generate scheme and can cause the SuperMIMO overall system performance not high, influence the speed of SuperMIMO system.
On the one hand, embodiments of the invention provide a kind of method that generates extended channel, comprising:
Use n twisted-pair feeder channel; Adopt different schemes to generate m different extended channels respectively; Each scheme in the said different schemes all generates m extended channel; Wherein, N＞2; M≤n-1; Wherein, Extended channel is divided into non-cascade extended channel and cascade extended channel, and each non-cascade extended channel is generated by two twisted-pair feeder channels, and each 1 grade of cascade extended channel is generated by two non-cascade extended channels; Or; Generate each L level cascade extended channel, wherein L＞1 by a non-cascade extended channel and a twisted-pair feeder channel; Generate by two L-1 level cascade extended channels; Or, generate by a L-1 level cascade extended channel and a non-cascade extended channel, or; Generate by a L-1 level cascade extended channel and a twisted-pair feeder channel; Or, generate by a L-1 level cascade extended channel and a L-i level cascade extended channel, wherein i＞1;
The overall performance parameter value of m the extended channel that obtains respectively to generate under the said different schemes;
The overall performance parameter value of the m that generates under a more said different schemes extended channel, and select the corresponding scheme of one of them non-minimum value P.
On the other hand, embodiments of the invention provide a kind of method that generates extended channel, comprising:
Using n twisted-pair feeder channel to carry out in the channel expansion process, wherein, n＞2 when using two channels to generate an extended channel, are measured the crossfire value of forming two interchannels of this channel combination in the different channel combinations respectively;
More said crossfire value, and select in the said crossfire value two channels in the corresponding channel combination of non-minimum value to generate extended channels.
On the other hand, embodiments of the invention provide a kind of device that generates extended channel, comprising:
The extended channel generation unit; Be used to use n twisted-pair feeder channel; Adopt different schemes to generate m different extended channels respectively; Each scheme in the said different schemes all generates m extended channel; Wherein, N＞2, m≤n-1, m extended channel comprises at least one extended channel; Wherein, Extended channel is divided into non-cascade extended channel and cascade extended channel, and each non-cascade extended channel is generated by two twisted-pair feeder channels, and each 1 grade of cascade extended channel is generated by two non-cascade extended channels; Or; Generate each L level cascade extended channel, wherein L＞1 by a non-cascade extended channel and a twisted-pair feeder channel; Generate by two L-1 level cascade extended channels; Or, generate by a L-1 level cascade extended channel and a non-cascade extended channel, or; Generate by a L-1 level cascade extended channel and a twisted-pair feeder channel; Or, generate by a L-1 level cascade extended channel and a L-i level cascade extended channel, wherein i＞1;
Performance parameter obtains the unit, is used for obtaining respectively the overall performance parameter value of m extended channel generating under the said different schemes;
Selected cell, the overall performance parameter value of m the extended channel that is used for generating under the more said different schemes, and select one of them non-minimum value P
1Corresponding scheme.
On the other hand, embodiments of the invention provide a kind of device that generates extended channel, comprising:
Twisted-pair feeder channel selected cell is used for selecting at random respectively from N twisted-pair feeder channel n twisted-pair feeder channel of various combination, n＞2 wherein, N＞n;
Middle scheme selected cell; Be used to use n twisted-pair feeder channel; Adopt different schemes to generate m different extended channels respectively; Each scheme in the said different schemes all generates m extended channel; Wherein, N＞2, m≤n-1, m extended channel comprises at least one extended channel; Wherein, Extended channel is divided into non-cascade extended channel and cascade extended channel, and each non-cascade extended channel is generated by two twisted-pair feeder channels, and each 1 grade of cascade extended channel is generated by two non-cascade extended channels; Or; Generate each L level cascade extended channel, wherein L＞1 by a non-cascade extended channel and a twisted-pair feeder channel; Generate by two L-1 level cascade extended channels; Or, generate by a L-1 level cascade extended channel and a non-cascade extended channel, or; Generate by a L-1 level cascade extended channel and a twisted-pair feeder channel; Or, generate by a L-1 level cascade extended channel and a L-i level cascade extended channel, wherein i＞1; The overall performance parameter value of m the extended channel that obtains respectively to generate under the said different schemes; The overall performance parameter value of the m that generates under a more said different schemes extended channel, and select the corresponding scheme of one of them non-minimum value P;
The final scheme selected cell is used for the corresponding non-minimum value P of n twisted-pair feeder channel of more said various combination and selects the scheme of one of them non-minimum value.
On the other hand, embodiments of the invention provide a kind of device that generates extended channel, comprising:
Measuring unit is used for using n twisted-pair feeder channel to carry out the channel expansion process, and wherein, n＞2 when using two channels to generate an extended channel, are measured the crossfire value of two interchannels of this channel combination of composition in the different channels combination respectively;
Selected cell is used for more said crossfire value, and selects in the said crossfire value two channels in the corresponding channel combination of non-minimum value to generate extended channels.Can choose a kind of more excellent or optimum extended channel scheme of selection intelligently through embodiments of the invention, make extended channel that more performance arranged, thereby make the SuperMIMO system have preferable performance.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention; The accompanying drawing of required use is done an introduction simply in will describing embodiment below; Obviously; Accompanying drawing in describing below only is some embodiments of the present invention; For those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a SuperMIMO DSL transmission system sketch map
Fig. 2 is the connection sketch map of DSLAM to CPE
Fig. 3 is a channel expansion method sketch map in the embodiment of the invention
Fig. 4 is a spreading channel signals transmission sketch map in the embodiment of the invention
Fig. 5 is a multiple channel expansion scheme sketch map in the embodiment of the invention
Fig. 6 is a multiple channel expansion scheme sketch map in the embodiment of the invention
Fig. 7 is the sketch map that generates the extended channel method in the embodiment of the invention
Fig. 8 is that common-mode signal is handled sketch map in the embodiment of the invention
Fig. 9 is a SuperMIMO channel initialization schematic flow sheet in the embodiment of the invention
Figure 10 is a kind of electronic switching circuit sketch map in the embodiment of the invention
Figure 11 is the sketch map that generates the extended channel method in the embodiment of the invention
Figure 12 is the sketch map that generates the extended channel method in the embodiment of the invention
Figure 13 is the sketch map that generates the extended channel method in the embodiment of the invention
Figure 14 generates the extended channel schematic representation of apparatus in the embodiment of the invention
Figure 15 generates the extended channel schematic representation of apparatus in the embodiment of the invention
Figure 16 generates the extended channel schematic representation of apparatus in the embodiment of the invention
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
When carrying out channel expansion based on the twisted-pair feeder channel; The extended channel that generates is divided into non-cascade extended channel and cascade extended channel; If being used to generate two channels of extended channel all is the twisted-pair feeder channel, the extended channel of Sheng Chenging just is non-cascade extended channel NCEC (Non-cascading Extended Channel) so; Have one to be extended channel if be used to generate two channels of extended channel, the extended channel of Sheng Chenging is exactly cascade extended channel CEC (Cascading Extended Channe1) so.Non-cascade extended channel is generated by two twisted-pair feeder channels; 1 grade of cascade extended channel is generated by two non-cascade extended channels; Perhaps generate by a non-cascade extended channel and a twisted-pair feeder channel; L level cascade extended channel greater than 1; Generate by two L-1 level cascade extended channels; Or; Generate by a L-1 level cascade extended channel and a non-cascade extended channel; Or; Generate by a L-1 level cascade extended channel and a twisted-pair feeder channel, or, generate by a L-1 level cascade extended channel and a L-i level cascade extended channel; Above-mentioned L＞1, i＞1.
When realizing NCEC and CEC, can do difference, generate an extended channel with the common-mode signal on the centre tap of two channels with centre tap.Use said method, can by more than or equal to any natural number n twisted-pair cable of 2 to generating n-1 NCEC or CEC extended channel, each twisted-pair cable is to twisted-pair feeder channel of correspondence.
As shown in Figure 3, generate the circuit of 7 channels with 4 couples of twisted-pair feeder P1, P2, P3 and P4.Wherein, P1, P2, P3, P4 link to each other with the output of transformer 1, transformer 2, transformer 3, transformer 4 respectively at transmitting terminal; And link to each other 3 among the figure and 4 two inputs or two outputs of distinguishing indication transformers at the input of receiving terminal and corresponding transformer; It is common differential mode twisted-pair feeder channel that DM1, DM2, DM3, DM4 are 4, through the centre tap 5 of transformer 1 and transformer 2, generates the NCEC1 channel by DM1 and DM2, and NCEC1 imports through transformer 5 at transmitting terminal; Centre tap 5 through transformer 3 and transformer 4; Generate the NCEC2 channel by DM3 and DM4, NCEC2 imports through transformer 6 at transmitting terminal, through the centre tap 5 of transformer 5 and transformer 6; Generate the CEC channel by NCEC1 and NCEC2, CEC imports through transformer 7 at transmitting terminal.
How Fig. 4 transmits at twisted-pair feeder from the channel signal of signal aspect explanation expansion, 4 couples of corresponding 4 twisted-pair feeder channel P of UTP
1, P
2, P
3And P
4, expansion obtains two NCEC channels: NCEC1 channel and NCEC2 channel, and a CEC channel.Wherein, NCEC1 channel, NCEC2 channel and CEC channel are respectively x at the signal that transmitting terminal sends
1, x
2And x
3, the signal of receiving at receiving terminal is respectively y
1, y
2And y
3Transmission signal on each extended channel all is divided into equal and opposite in direction, two signals that direction is opposite, and transmit as the common-mode signal of twisted-pair feeder channel.Wherein, the x on the NCEC1 channel
1Signal is divided into+x
1/ 2 with-x
1/ 2, respectively as P
1The common-mode signal of channel and P
2The common-mode signal of channel is transmitted.X on the NCEC2 channel
2Signal is divided into+x
2/ 2 with-x
2/ 2, respectively as P
3The common-mode signal of channel and P
4The common-mode signal of channel is transmitted.X on the CEC channel
3Signal is divided into+x
3/ 2 with-x
3/ 2, transmit as the common-mode signal of NCEC1 channel and the common-mode signal of NCEC2 channel respectively, wherein, be divided into+x during through the NCEC1 channel
3/ 4 with+x
3/ 4, respectively as P
1The common-mode signal of channel and P
2The common-mode signal of channel is transmitted, and is divided into-x during through the NCEC2 channel
3/ 4 with-x
3/ 4, respectively as P
3The common-mode signal of channel and P
4The common-mode signal of channel is transmitted.Transmission and reception to the common mode channel of every pair of twisted-pair feeder are to realize through the centre tap of the transformer in the connection layout 1.To on the circuit that connects the both sides tap, respectively produce the signal of X/2 to the centre tap transmission X of transformer signal, thereby reach the purpose of sending common-mode signal.
As shown in Figure 5; Differential mode with common-mode signal generates extended channel; If 4 twisted-pair cables are arranged to P1, P2, P3, P4; The extended channel that needs to generate is: 2 non-cascade extended channels; 11 grade of cascade extended channel and this 1 grade of cascade extended channel are generated by 2 non-cascade extended channels; Under this pattern, 4 lines are to there being generation schemes different in 3:
501: use P1, P4 generates NCEC1, P2, and P3 generates NCEC2, and NCEC1 and NCEC2 generate CEC.
502: use P1, P2 generates NCEC1, P3, and P4 generates NCEC2, and NCEC1 and NCEC2 generate CEC.
503: use P1, P3 generates NCEC1, P2, and P4 generates NCEC2, and NCEC1 and NCEC2 generate CEC.
Certainly; The extended channel of required generation also can be: 1 non-cascade extended channel; 11 grade of cascade extended channel that generates by non-cascade extended channel and twisted-pair feeder channel; 1 by 11 grade of cascade extended channel and 12 grades of cascade extended channel that the twisted-pair feeder channel generates; Under this kind pattern, 3 kinds of generation schemes as shown in Figure 6 can be arranged:
601: use P1, P4 generates NCEC1, and P2 and NCEC1 generate CEC1, and CEC1 and P 3 generate CEC2.
602: use P1, P4 generates NCEC1, and P3 and NCEC1 generate CEC1, and CEC1 and P2 generate CEC2.
603: use P1, P3 generates NCEC1, and P2 and NCEC1 generate CEC1, and CEC1 and P4 generate CEC2.
Like scheme among 3 among 3 kinds of schemes among Fig. 5 and Fig. 6; Though all generated 3 extended channels; But the performance of the extended channel that generates possibly be different, and embodiments of the invention provide the method for from different extended channel schemes, selecting the more excellent scheme of a kind of performance.
After user's distribution is confirmed; Promptly confirmed n twisted-pair feeder channel that will be used by CPE; Can adopt the method 700 shown in Fig. 7, the performance that selection will be used in the different schemes of this n twisted-pair feeder channel generation extended channel is scheme preferably, and this method comprises:
701: use n twisted-pair feeder channel, adopt different schemes to generate m different extended channels respectively, each scheme in the said different schemes all generates m extended channel, wherein, and n＞2, m≤n-1;
703: the overall performance parameter value of m the extended channel that obtains respectively to generate under the said different schemes;
705: the overall performance parameter value of the m that generates under a more said different schemes extended channel, and select the corresponding scheme of one of them non-minimum value P.
Can have identical pattern between the different schemes in 701; Be between the different scheme: the number of non-cascade extended channel is identical; And the number of 1 grade of cascade extended channel is identical and to generate the type of two channels of each 1 grade of cascade extended channel respectively identical, and the number of other L level cascade extended channel of each grade is identical, the type ranks identical respectively and these two channel cascade extended channels of two channels generating this L level cascade extended channel are identical respectively.For example, 3 scheme modes among Fig. 5 are identical, and 3 scheme modes among Fig. 6 are identical.Certainly, between the different schemes, also can have different patterns, for example 601 among 501 among Fig. 5 and Fig. 6.
With Fig. 5 is example; With 4 twisted-pair feeder channels can generate comprise 2 NCEC and 1 CEC 3 extended channels; 501,502,503 expression different schemes; It is different generating 3 channel that extended channel adopted combinations in each scheme; Generate NCEC1, NCEC2, CEC between these three schemes and all adopted the combination of different channel respectively, for example, the channel combination that generates NCEC1 in 501 is P1 and P4; The channel combination that generates NCEC1 in 502 is P1 and P2, and in 503 is P1 and P3.
Be example again with Fig. 6; Can generate 3 extended channels that comprise 1 NCEC and 2 CEC with 4 twisted-pair feeder channels; 601, the 602, the 603rd, different schemes; Between 601 and 602; The channel combination that generates NCEC1 is identical; All be P1 and P4, but the channel combination that generates CEC1 is different, the channel combination that generates CEC2 also is different.Between 601 and 603, though CEC1 is generated by NCEC1 and P2, be different owing to generate the channel combination of NCEC1 employing, the channel combination that therefore generates CEC1 also is different.
Fig. 5 and shown in Figure 6 all be the situation that generates 3 extended channels with 4 twisted-pair feeder channels; Can certainly use 4 twisted-pair feeder channels only to generate 2 NCEC; Perhaps only generate 1 NCEC and 1 CEC, the scheme of different generation extended channels also can be arranged under these two kinds of situations.
It as n 2 p power; P >= 2 wherein; When generating n-1 extended channel; Use all n twisted-pair feeder channel to generate non-cascade extended channel in twos; Use all non-cascade extended channels to generate 1 grade of cascade extended channel in twos; Each 1 grade of cascade extended channel is only generated by two non-cascade extended channels; Since 1 grade of cascade extended channel; If this grade cascade extended channel is not 1; Then use all this grade cascade extended channels to generate more higher leveled cascade extended channel in twos; The rest may be inferred; Highest cascade extended channel up to generating has only 1; Each L level cascade extended channel is only generated by two L-1 level cascade extended channels; Can have a plurality of different schemes can carry out channel expansion in a manner mentioned above, the overall performance parameter of n-1 the extended channel that can obtain respectively to generate under the different schemes is therefrom selected non-minimum corresponding scheme in the overall performance parameter value; Preferably, non-minimum of a value is a maximum.
When said n twisted-pair feeder channel only connected the end among central office CO (Central Office) or the subscriber terminal equipment CPE (Customer Premises Equipment), the overall performance parameter value of m the extended channel that can obtain respectively through method hereinafter described to generate under the said different schemes.
The characteristic right owing to each line is not exclusively the same, therefore, and can be than the DM bad channel of general twisted-pair power cable by two lines to the extended channel degree of balance performance of forming.The degree of balance can use longitudinal balance degree LB (Longitudinal Balance) to weigh.Except longitudinal balance degree, the measurement of line balance also has vertical conversion ratio LCL (Longitudinal conversion Loss) etc.The degree of balance of circuit is a key factor that influences the signal transmission, therefore, when selecting extended channel, can select the good extended channel of the degree of balance.
With Fig. 5 is example, during employing scheme 501, and the longitudinal balance degree of difference measuring N CEC1, NCEC2, CEC; Switch to scheme 502, measure the longitudinal balance degree of each extended channel; Switch to scheme 503, measure the longitudinal balance degree of each extended channel, calculate the longitudinal balance degree sum of each extended channel in 3 schemes respectively, the longitudinal balance degree sum of gained can be used as the overall performance parameter that characterizes 3 extended channels that generate.The scheme of the non-minimum of longitudinal balance degree sum can be selected, preferably, the maximum scheme of longitudinal balance degree sum can be selected.
Crosstalking between the extended channel that generates is more little; Influencing each other between them is also just more little; Therefore; Can assess the performance of extended channel through measuring crosstalking between a plurality of extended channels that generate under the different schemes; And then the off-peak extended channel scheme of totally crosstalking between the selection extended channel; Preferably, can select the minimum scheme of totally crosstalking.
Crosstalk and comprise near-end cross NEXT (Near End Crosstalk) and far-end cross talk FEXT (Far End Crosstalk).Crosstalking can be that differential mode is crosstalked, and just on a channel, sends out difference mode signal, on other channel/circuits, receives the differential mode crosstalk signal.Said crosstalking except the use differential mode is crosstalked also can be used common mode crosstalk in the embodiment of the invention, is exactly on a channel/circuit, to send out common-mode signal, on other channel/circuits, receives the common mode crosstalk signal.Using the benefit of common mode crosstalk is that common mode crosstalk is crosstalked stronger than differential mode, measured more easily.
With Fig. 5 is example, switches to scheme 501, measuring N CEC1, NCEC2, crosstalking between the CEC; Equally, switch to scheme 502,503, measuring N CEC1, NCEC2, crosstalking between the CEC calculated the sum of crosstalking between the extended channel that records under the different schemes, and the inverse of this sum of crosstalking can be used as the parameter of the overall performance that characterizes extended channel.When n twisted-pair feeder channel only connected the end among CO or the CPE, crosstalking of measurement can be that the near-end common mode crosstalk or the near-end differential mode of link crosstalked.Can select the inverse of each channel interference sum, or the scheme of the non-minimum reciprocal of the energy sum of crosstalking, preferably, can select the maximum scheme of overall performance parameter.
When n twisted-pair feeder channel both connected CO; When also having connected CPE; The acquisition of describing in 703 characterizes the performance parameter value of the overall activation rate of m extended channel; Except can be from any one link be measured longitudinal balance degree and near-end cross; Can also measure the far-end cross talk of each extended channel; Activation rate; Achievable rate; Signal to noise ratio; Performance index such as decay, and correspondingly use the inverse of the sum of crosstalking; The activation rate sum; The achievable rate sum; The signal to noise ratio sum; The inverse of decay sum is used as characterizing the overall performance parameter of m extended channel.
More than the concrete measuring process of Miao Shuing can adopt the DSL nest plate to realize.
Specific to adopting different schemes to generate m extended channel described in 701 respectively, can adopt similar device as shown in Figure 8 to realize.Fig. 8 with 4 lines to being example; Line links to each other with 4 with the output 3 of transformer 1, transformer 2, transformer 3, transformer 4 respectively to P1, P2, P3, P4; Each transformer centre tap 5 links to each other with each common-mode signal transceiver respectively, and modular converter obtains the common-mode signal of each twisted-pair feeder channel and common-mode signal is handled the back to generate extended channel through the common-mode signal transceiver.The mode of in the control module control transformation module common-mode signal being carried out digital processing is to obtain different channel expansion schemes respectively.Control module can use the DSL nest plate to realize.After the extended channel scheme is confirmed, can be with selected extended channel scheme notice opposite end.
Existing DSL initialization flow process comprises handshake phase, channel discovery phase, training stage, Multiple Channel Analysis and mutual stage.Existing DSL traffic channel initialization procedures is the initialization to a DSL channel.The SuperMIMO initialization is multi channel associating initialization procedure.At the SuperMIMO initial phase, a plurality of channels carry out initialization simultaneously among the SuperMIMO.
In the SuperMIMO initialization procedure, the initialization of channel can comprise that an extended channel scheme confirms the stage.An instance of SuperMIMO traffic channel initialization procedures comprises that SuperMIMO handshake phase 901, extended channel scheme confirm stage 903, channel discovery phase, training stage, Multiple Channel Analysis and mutual stage shown among Fig. 9 900.Can carry out mutual SuperMIMO user basic information in SuperMIMO handshake phase 901.
Further; Channel expansion information can be at capabilities list CL (Capabilities List); Capabilities list+request CLR (Capabilities List+Request); Mode request MR (Model Request); Model selection MS (Model Select); Transmit in the schema recommendation MP message such as (Mode Proposal), transceiver obtains the channel expansion information of opposite end from the other side's message of receiving, and sends message and respond.In channel expansion information; The twisted-pair feeder logarithm parameter that SuperMIMO user uses is used to notify modular converter; Whether the common-mode signal of obtaining which twisted-pair feeder is used to make up extended channel, use the extended channel generating mode parameter of cascade to be used to notify modular converter, whether uses the CEC channel.If without CEC, so only generate NCEC, no longer continue expansion after NCEC generates and finishes and generate CEC.
Employing different schemes respectively described in 701 generates extended channel, also can adopt the mode of similar electronic switch as shown in figure 10 to realize.To realize that different extended channel schemes is an example among Fig. 5; The on off state of 1001 shown in Figure 10,1002,1,003 three switches is formed an on off state combination; Expression P1 and P2 form NCEC1; P3 and P4 form NCEC2; Channel expansion scheme 502 in the corresponding diagram 5, control unit is controlled the on off state of three switches.Above-mentioned 3 switches also can adopt the scheme of other on off state combination with 501,503 in the corresponding diagram 5 respectively.Therefore, corresponding certain scheme, the on off state that can control one group of each switch in the electronic switch is to generate each extended channel.For different schemes; Can control one group of electronic switch adopts different on off state combinations to realize different schemes; The on off state of each electronic switch forms an on off state combination in one group of electronic switch; Different on off states makes up corresponding different schemes; Different on off state combinations is corresponding one by one with different schemes; Between the combination of different on off state, the on off state of each electronic switch is incomplete same in one group of electronic switch.Electronic switch is a kind of device that can be controlled the different pins of connection by program or physical button.
More than the channel expansion Scheme Choice process of Miao Shuing can be in 900 realizes in the initialization procedure of SuperMIMO; For example; Can be after the SuperMIMO handshake phase; Before the channel discovery phase; N of use will be by the twisted-pair feeder channel of CPE use; Adopt different schemes to generate m different extended channels, the scheme of the non-minimum of overall performance parameter of m the extended channel that selection generates is carried out initialization to the extended channel that generates under this scheme then.Preferably, can select the maximum scheme of population parameter value.
Before confirming distribution; When the twisted-pair feeder that user CPE will use is not also confirmed; The twisted-pair cable that available twisted-pair cable uses greater than needs quantity N is to quantity n; It is right to select n line of various combination from N line centering; N line to various combination is right; Adopt above-mentioned method to select a scheme, then compare the scheme that various combination is selected down, therefrom select a scheme again.Can before operator activates the service, carry out circuit and select, obtain preferable performance to make the user as far as possible.
When carrying out above-mentioned selection circuit,, can select through the signal of central office CO (Central Office) DSLAM transmission because distribution does not confirm that also CPE generally not have to connect.
N described in 701 twisted-pair feeder channel can be selected from N twisted-pair feeder channel at random, and extended channel Scheme Choice process may further include following processing as shown in figure 11:
1101: from said N twisted-pair feeder channel, select M group twisted-pair feeder channel at random; M＞1 wherein; Every group comprises n twisted-pair feeder channel; Every group n twisted-pair feeder channel is all different with said n twisted-pair feeder channel; N twisted-pair feeder channel in every group selected the corresponding corresponding scheme of non-minimum value, and the corresponding non-minimum value of k group is P
k, k=1,2...M.Preferably, can select the corresponding scheme of maximum.
1103: more said P and P
1, P
2... P
MAnd select the corresponding scheme of one of them non-minimum value.Preferably, can select the corresponding scheme of maximum.
Because the twisted-pair feeder channel has connected CO, can obtain to characterize the parameter of the extended channel overall performance that generates through the longitudinal balance degree of measuring extended channel; Perhaps during greater than 1, can measure the near-end common mode crosstalk or the near-end differential mode of the CO end between the extended channel and crosstalk, obtain to characterize the parameter of the extended channel overall performance that generates at the extended channel that generates.
In generating the extended channel process; Can be through measuring with crosstalking between two extended channels that generate an extended channel; Any select to generate an extended channel with two extended channels; The method of a kind of extended channel that embodiments of the invention provide is shown among Figure 12 1200, and this method comprises:
1201: using n twisted-pair feeder channel to carry out in the channel expansion process, wherein, n＞2 when using two channels to generate an extended channel, are measured the crossfire value of two interchannels of this channel combination of composition in the different channels combination respectively;
1203: the crossfire value that relatively records, and select in the said crossfire value two channels in the corresponding channel combination of non-minimum value to generate extended channels.
Further, two channels forming this channel combination during different channels makes up described in 1201 all are two twisted-pair feeder channels, and said two twisted-pair feeder channels can generate a non-cascade extended channel; Perhaps, all be a twisted-pair feeder channel and a non-cascade extended channel, a said twisted-pair feeder channel and a non-cascade extended channel can generate 1 grade of cascade extended channel; Perhaps, all be two non-cascade extended channels, said two non-cascade extended channels can generate 1 grade of cascade extended channel; Perhaps, all be two L-1 level cascade extended channels, L＞1 wherein, said two L-1 level cascade extended channels can generate a L level cascade extended channel; Perhaps, all be a L-1 level cascade extended channel and a twisted-pair feeder channel, L＞1 wherein, a said L-1 level cascade extended channel and a twisted-pair feeder channel can generate a L level cascade extended channel; Perhaps, all be a L-1 level cascade extended channel and a non-cascade extended channel, L＞1 wherein, a said L-1 level cascade extended channel and a non-cascade extended channel can generate a L level cascade extended channel; Perhaps, all be a L-1 level cascade extended channel and a L-i level cascade extended channel, L＞1 wherein, i＞1, a said L-1 level cascade extended channel and a L-i level cascade extended channel can generate a L level cascade extended channel.
With Fig. 5 is example; Adopt 4 twisted-pair cables to generating 3 extended channels; 2 non-cascade extended channels that generate for the twisted-pair feeder channel wherein; 1 is two cascade extended channels that non-cascade extended channel generates; In these 3 extended channels; When generating first non-cascade extended channel NCEC1; Can have different channel group symphysis to become NCEC1, these different channels combinations comprise P1 and P4, P1 and P3; P1 and P2; P2 and P3, P2 and P4, P3 and P4; When generating NCEC1; Can measure crosstalking of two twisted-pair feeder interchannels in the combination of these different channels, and compare and measure the crossfire value that obtains, a channel group symphysis of the non-minimum of from these crossfire values, selecting to crosstalk becomes NCEC1; Preferably, can select the maximum combination of crossfire value.
Be example again with Fig. 6, the different channel combination that generates NCEC1 comprises P1 and P4, P1 and P3; P1 and P2; P2 and P3, P2 and P4, P3 and P4; When generating NCEC1; Can measure crosstalking of two interchannels in the combination of these different channels, and compare and measure the crossfire value that obtains, a channel group symphysis of the non-minimum of from these crossfire values, selecting to crosstalk becomes NCEC1; Preferably, can select the maximum combination of crossfire value; Suppose that P1 and P4 combination is selected to generate NCEC1; The different channels combination that then generates CEC1 has NCEC1 and P2, NCEC1 and P3; Can measure crosstalking of two interchannels in these the two kinds different channels combinations; And the crossfire value that relatively records, a combination of selecting to crosstalk maximum generates CEC1; After the channel that generates CEC1 made up and confirms, the channel combination that generates CEC2 had only a kind of.
It as n 2 p power; P >= 2 wherein; When generating n-1 extended channel; Use all n twisted-pair feeder channel to generate non-cascade extended channel in twos; Use all non-cascade extended channels to generate 1 grade of cascade extended channel in twos; Each 1 grade of cascade extended channel is only generated by two non-cascade extended channels; Since 1 grade of cascade extended channel; If this grade cascade extended channel is not 1; Then use all this grade cascade extended channels to generate more higher leveled cascade extended channel in twos; The rest may be inferred, has only 1 up to the highest cascade extended channel that generates, and each L level cascade extended channel is only generated by two L-1 level cascade extended channels.Can be in generating n-1 extended channel process, all adopt as shown in figure 12 method to select before to each extended channel that a plurality of different incompatible generations of channel group can be arranged generating.3 powers with 2, promptly 8 twisted-pair feeder channels are example, can generate 7 extended channels, 4 non-cascade extended channels wherein, 21 grade of cascade extended channels, 12 grades of cascade extended channel.When generating preceding 3 non-cascade extended channels, all there is different channel combinations available, when generating first 1 grade of cascade extended channel, also has different channel combinations available.
Further, when measuring the crossfire value described in 1201, when this n twisted-pair feeder channel has been connected to CO but has not been connected to CPE, can crosstalk at the near-end common mode crosstalk or the near-end differential mode of CO side measure CO end; When said n twisted-pair feeder channel has been connected to CO and CPE, can measure that far-end common mode crosstalk, far-end differential mode are crosstalked at CO end or cpe end, a kind of in crosstalking of near-end common mode crosstalk, near-end differential mode; Be not connected to CO when said n twisted-pair feeder channel but when being connected to CPE, can measure a kind of in crosstalking of near-end common mode crosstalk, near-end differential mode at cpe end.Can send reference signal through the DSL nest plate, and measure and crosstalk.
In the method shown in 1200, said n twisted-pair feeder channel can be the twisted-pair feeder channel of after confirming distribution, having confirmed to be connected to CPE.Also can be n twisted-pair feeder channel before distribution is confirmed, its quantity can be connected to the quantity of the twisted-pair feeder channel of CPE greater than needs.
Before distribution was confirmed, available twisted-pair feeder channel quantity N was greater than the twisted-pair feeder channel quantity n that will be used by CPE, embodiments of the invention provide a kind of from N twisted-pair feeder channel the method for n twisted-pair feeder channel of selection, detailed process comprises as shown in figure 13:
1301: the crossfire value of the different twisted-pair feeder channel combinations of forming in twos in the not selected twisted-pair feeder channel in the measuring N twisted-pair feeder channel;
1303: the crossfire value of more different twisted-pair feeder channel combinations;
1305: choose two twisted-pair feeder channels in the maximum combination of the crossfire value of different twisted-pair feeder channels combination;
1307: if the number of the twisted-pair feeder channel of choosing does not reach n; Perhaps; The number of the twisted-pair feeder channel of choosing does not reach n-1; Repeat above process; Reach n up to the number of the twisted-pair feeder channel of choosing, perhaps, reach n-1 up to the number of the twisted-pair feeder channel of choosing; From not selected twisted-pair feeder channel, select 1 at random, make the twisted-pair feeder channel number of choosing reach n.
When selecting circuit,, can select through the signal that central office CO (Central Office) DSLAM sends because distribution does not confirm that also CPE does not generally have to connect.Crosstalking in 1301 can be crosstalked for the near-end common mode crosstalk or the near-end differential mode of CO end.
Embodiments of the invention provide a kind of device of extended channel, and shown among Figure 14 1400, n representes n twisted-pair feeder channel; Extended channel generation unit 1401 uses n twisted-pair feeder channel, adopts different schemes to generate m extended channel, wherein n＞2 respectively; M≤n-1, m
1And m
2Expression is two extended channels that different schemes generates wherein.The channel combination that each extended channel adopted in m extended channel is different, and it is also inequality to generate the channel combination that each extended channel adopted between the different schemes, and therefore m the extended channel that generates is also inequality.
Performance parameter obtains the parameter P value that unit 1403 obtains to characterize under each different schemes the overall performance of m extended channel respectively, for example m
1And m
2The overall performance parameter value of middle m extended channel is respectively P
1And P
2
The selected cell 1405 relatively corresponding respectively P value of each scheme is also therefrom selected a scheme that non-minimum value is corresponding, and preferably, non-minimum value is maximum P
Max
Further; Performance parameter obtains unit 1403 can comprise measurement module 1407 and computing module 1409; Adopt different schemes to generate respectively after m the extended channel; When m >=1; Measurement module can be measured the performance parameter value of each extended channel in m the extended channel that generates under the said different schemes respectively; Said performance parameter value comprises longitudinal balance degree; Activation rate; Achievable rate; Signal to noise ratio; The decay inverse in a kind of; Computing module calculates the performance parameter value sum of each extended channel in m the extended channel that generates under the said different schemes, and is said and as said overall performance parameter value; When m＞1; Owing to can measure crosstalking between the extended channel; Measurement module can also be measured overall crossfire value or the overall crosstalk energy value between m the extended channel that generates under the said different schemes respectively; Computing module calculates the inverse of the reciprocal or overall crosstalk energy value of the overall crossfire value between m the extended channel that generates under the said different schemes, and the inverse of the reciprocal or overall crosstalk energy value of said overall crossfire value is as the overall performance parameter.
Further; Extended channel generation unit 1401 can comprise modular converter and control module as shown in Figure 8; Modular converter obtains the common-mode signal of each twisted-pair feeder channel in n the twisted-pair feeder channel, and the common-mode signal of n twisted-pair feeder is carried out generating m extended channel after the digital processing; Control module control transformation module is carried out the mode of digital processing to obtain the different channels expansion scheme respectively to common-mode signal.Control module can adopt the DSL nest plate to realize.The extended channel generation unit can further include transceiver; Be used for the receive channel extend information; Utilize said channel expansion information that said common-mode signal is carried out digital processing generating the extended channel in the different channels expansion scheme, said channel expansion information comprise twisted-pair cable that the user uses to quantity, whether use the extended channel generating mode of cascade.
Device shown in 1400 can be realized perhaps realizing among the CPE in CO.If in CO, realize, can comprise modular converter among the CO, carry out digital processing at modular converter, generate various extended channels.Modular converter can generate the scheme of at least two kinds of extended channels.CO can send message and give CPE, measures after the extended channel generation scheme of notifying the other side to switch to correspondence; Also can not notify CPE, the single-ended extended channel scheme of carrying out of CO is switched to obtain different extended channel generation schemes and to select.CO accomplishes after the extended channel selection, and with the generating mode notice CPE of extended channel, CO and CPE carry out channel expansion according to the extended channel generation scheme that CO confirms, and extended channel is carried out initialization.
If in CPE, realize, the last modular converter that comprises of CPE carries out digital processing at modular converter, generates various extended channels.Modular converter has two kinds of schemes that generate extended channel at least.CPE can send message and give CO, measures after notifying the other side to switch to corresponding extended channel generation scheme; CPE also can not notify CO, and the single-ended extended channel scheme of carrying out of CPE is switched and single-ended measurement; Also can be CPE carries out channel approach under the control of CO switching, CO and CPE switch to a kind of channel expansion mode, are measured by CPE then and confirm scheme.CPE accomplishes after the extended channel selection, and with the generating mode notice CO of extended channel, CO and CPE carry out channel expansion according to the extended channel generation scheme that CPE confirms, and extended channel is carried out initialization.
In addition, the extended channel generation unit also can adopt similar mode as shown in figure 10 to realize, the extended channel generation unit comprises control module and one group of electronic switch.Control module is controlled one group of electronic switch and is adopted different on off state combinations to generate m extended channel respectively respectively, and different on off states makes up corresponding different schemes.
Embodiments of the invention provide a kind of device of extended channel, and shown among Figure 15 1500, N representes N twisted-pair feeder channel; Twisted-pair feeder channel selected cell 1501 is selected n twisted-pair feeder channel of various combination, wherein n＞2 at random from N twisted-pair feeder channel; N＞n, n
1And n
2Represent two different combinations;
Middle scheme selected cell 1503 is used to use n twisted-pair feeder channel, for example n of certain combination of selecting
1Or n
2Adopt different schemes to generate m extended channel respectively; Wherein, M≤n-1; Each scheme all generates m extended channel; It is different generating the channel combination that each extended channel adopted in m the extended channel in the same scheme, and it is different to generate the channel combination that each extended channel adopted between the different schemes; Obtain to characterize under each different schemes the overall performance parameter P value of m extended channel respectively, relatively the corresponding P value of each scheme is also therefrom selected a scheme that non-minimum value is corresponding, preferably, can select the corresponding scheme of maximum.For example among Figure 15, select the corresponding scheme of maximum, combination n
1Corresponding P
Max1, n
2Corresponding P
Max2
Final scheme selected cell 1505 is the corresponding non-minimum value of n twisted-pair feeder channel of various combination relatively, and from these non-minimum values, selects a scheme that non-minimum value is corresponding again according to comparative result, preferably, can select maximum.For example among Figure 15, from comprising P
Max1, P
Max2In interior maximum, select maximum P again
Max
As shown in figure 16, embodiments of the invention provide a kind of extended channel device 1600, and this device comprises:
Measuring unit 1601 is used for using n twisted-pair feeder channel to carry out the channel expansion process, and wherein, n＞2 when using two channels to generate an extended channel, are measured the crossfire value of two interchannels of this channel combination of composition in the different channels combination respectively;
Can know by above description, can choose intelligently through embodiments of the invention and select a kind of more excellent extended channel scheme, make extended channel that more performance arranged, thereby make the SuperMIMO system have preferable performance.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential hardware platform, can certainly all implement through hardware.Based on such understanding; All or part of can the coming out that technical scheme of the present invention contributes to background technology with the embodied of software product; This computer software product can be stored in the storage medium; Like ROM/RAM, magnetic disc, CD etc.; Comprise that some instructions are with so that a computer equipment (can be a personal computer; Server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
The above; Only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (17)
1. a method that generates extended channel is characterized in that, comprising:
Use n twisted-pair feeder channel; Adopt different schemes to generate m different extended channels respectively; Each scheme in the said different schemes all generates m extended channel; Wherein, N＞2; M≤n-1; Wherein, Extended channel is divided into non-cascade extended channel and cascade extended channel, and each non-cascade extended channel is generated by two twisted-pair feeder channels, and each 1 grade of cascade extended channel is generated by two non-cascade extended channels; Or; Generate each L level cascade extended channel, wherein L＞1 by a non-cascade extended channel and a twisted-pair feeder channel; Generate by two L-1 level cascade extended channels; Or, generate by a L-1 level cascade extended channel and a non-cascade extended channel, or; Generate by a L-1 level cascade extended channel and a twisted-pair feeder channel; Or, generate by a L-1 level cascade extended channel and a L-i level cascade extended channel, wherein i＞1;
The overall performance parameter value of m the extended channel that obtains respectively to generate under the said different schemes;
The overall performance parameter value of the m that generates under a more said different schemes extended channel, and select the corresponding scheme of one of them non-minimum value P.
2. the method for claim 1 is characterized in that, the overall performance parameter value of said m the extended channel that obtains respectively to generate under the said different schemes comprises:
Measure the performance parameter value of each extended channel in m the extended channel that generates under the said different schemes respectively; Calculate the performance parameter sum of said each extended channel; Said and as said overall performance parameter value; Wherein, Said performance parameter value comprises a kind of in the inverse of longitudinal balance degree, activation rate, achievable rate, signal to noise ratio, decay, wherein m >=1; Perhaps,
Measure overall crossfire value or overall crosstalk energy value between m the extended channel that generates under the said different schemes respectively, the inverse of the reciprocal or overall crosstalk energy value of said overall crossfire value is as said overall performance parameter value, wherein m＞1.
3. method as claimed in claim 1 or 2 is characterized in that, the said different schemes that adopts respectively generates m different extended channels, comprising:
Obtain the common-mode signal of each twisted-pair feeder channel in said n the twisted-pair feeder channel; Control is carried out the mode of digital processing to obtain said different schemes respectively to said common-mode signal, under said different schemes, said common-mode signal is carried out digital processing to generate m extended channel respectively.
4. method as claimed in claim 3 is characterized in that, further comprises:
The receive channel extend information utilizes said information that said common-mode signal is carried out digital processing generating m extended channel respectively under said different schemes, said information comprise twisted-pair cable that the user uses to quantity, whether generate the cascade extended channel.
5. method as claimed in claim 1 or 2 is characterized in that, the said different schemes that adopts respectively generates m different extended channels, comprising:
Controlling one group of electronic switch adopts different on off state combinations to generate said different schemes respectively; Said different on off states combination is corresponding one by one with said different schemes; According to each on off state combination, the state of controlling each switch in said one group of electronic switch is to generate m extended channel.
6. like arbitrary described method among the claim 1-5, it is characterized in that, in the traffic channel initialization procedures of super multiple-input and multiple-output Digital Subscriber Line, the extended channel that generates under the corresponding scheme of said non-minimum value P is carried out initialization.
7. like arbitrary described method among the claim 1-6, it is characterized in that said n twisted-pair feeder channel selected at random from N twisted-pair feeder channel;
Further comprise:
From said N twisted-pair feeder channel, select M group twisted-pair feeder channel at random; M＞1 wherein; Every group comprises n twisted-pair feeder channel; Every group n twisted-pair feeder channel is all different with said n twisted-pair feeder channel; N twisted-pair feeder channel in every group selected the corresponding corresponding scheme of non-minimum value, and the corresponding non-minimum value of k group is P
k, k=1,2...M;
More said P and P
1, P
2... P
MAnd select the corresponding scheme of one of them non-minimum value.
8. a method that generates extended channel is characterized in that, comprising:
Using n twisted-pair feeder channel to carry out in the channel expansion process, wherein, n＞2 when using two channels to generate an extended channel, are measured the crossfire value of forming two interchannels of this channel combination in the different channel combinations respectively;
More said crossfire value, and select in the said crossfire value two channels in the corresponding channel combination of non-minimum value to generate extended channels.
9. method as claimed in claim 8 is characterized in that,
Said n twisted-pair feeder channel has been connected to central office CO but has not been connected to subscriber terminal equipment CPE, a kind of during the said near-end common mode crosstalk, the near-end differential mode that comprise the CO end of crosstalking crosstalked; Perhaps,
Said n twisted-pair feeder channel has been connected to CO and CPE, saidly crosstalks that far-end common mode crosstalk, the far-end differential mode that comprises CO end or cpe end crosstalked, a kind of in crosstalking of near-end common mode crosstalk, near-end differential mode; Perhaps,
But said n twisted-pair feeder channel is not connected to CO has been connected to CPE, a kind of during the said near-end common mode crosstalk, the near-end differential mode that comprise cpe end of crosstalking crosstalked.
10. like method as described in claim 8 or 9, it is characterized in that, form two channels of this channel combination in the said different channel combination,
All be two twisted-pair feeder channels, said two twisted-pair feeder channels can generate a non-cascade extended channel; Perhaps,
All be a twisted-pair feeder channel and a non-cascade extended channel, a said twisted-pair feeder channel and a non-cascade extended channel can generate 1 grade of cascade extended channel; Perhaps,
All be two non-cascade extended channels; Said two non-cascade extended channels can generate 1 grade of cascade extended channel; Perhaps,
All be two L-1 level cascade extended channels; Said two L-1 level cascade extended channels can generate L level cascade extended channel, wherein L＞1; Perhaps,
All be a L-1 level cascade extended channel and a twisted-pair feeder channel; A said L-1 level cascade extended channel and a twisted-pair feeder channel can generate L level cascade extended channel, wherein L＞1; Perhaps,
All be a L-1 level cascade extended channel and a non-cascade extended channel; A said L-1 level cascade extended channel and a non-cascade extended channel can generate L level cascade extended channel, wherein L＞1; Perhaps,
All be a L-1 level cascade extended channel and a L-i level cascade extended channel; A said L-1 level cascade extended channel and a L-i level cascade extended channel can generate a L level cascade extended channel, L＞1 wherein, i＞1.
11. an extended channel device is characterized in that, comprising:
The extended channel generation unit; Be used to use n twisted-pair feeder channel; Adopt different schemes to generate m different extended channels respectively; Each scheme in the said different schemes all generates m extended channel; Wherein, N＞2; M≤n-1; Extended channel is divided into non-cascade extended channel and cascade extended channel, and each non-cascade extended channel is generated by two twisted-pair feeder channels, and each 1 grade of cascade extended channel is generated by two non-cascade extended channels; Or; Generate each L level cascade extended channel, wherein L＞1 by a non-cascade extended channel and a twisted-pair feeder channel; Generate by two L-1 level cascade extended channels; Or, generate by a L-1 level cascade extended channel and a non-cascade extended channel, or; Generate by a L-1 level cascade extended channel and a twisted-pair feeder channel; Or, generate by a L-1 level cascade extended channel and a L-i level cascade extended channel, wherein i＞1;
Performance parameter obtains the unit, is used for obtaining respectively the overall performance parameter value of m extended channel generating under the said different schemes;
Selected cell, the overall performance parameter value of m the extended channel that is used for generating under the more said different schemes, and select the corresponding scheme of one of them non-minimum value P.
12. device as claimed in claim 11 is characterized in that, said performance parameter obtains the unit and comprises:
Measurement module; Be used for measuring respectively the performance parameter value of m each extended channel of extended channel that generates under the said different schemes; Said performance parameter value comprises a kind of in the inverse of longitudinal balance degree, activation rate, achievable rate, signal to noise ratio, decay, wherein m >=1; Perhaps, be used for measuring respectively overall crossfire value or overall crosstalk energy value, wherein m＞1 between m the extended channel that generates under the said different schemes;
Computing module is used for calculating the performance parameter value sum of m each extended channel of extended channel that generates under the said different schemes of measuring gained, and is said and as said overall performance parameter value, wherein m >=1; Perhaps; Be used to calculate the inverse of the reciprocal or overall crosstalk energy value of the overall crossfire value between m the extended channel that generates under the said different schemes of measuring gained; The inverse of the reciprocal or overall crosstalk energy value of said overall crossfire value is as the overall performance parameter, wherein m＞1.
13., it is characterized in that said extended channel generation unit comprises like claim 11 or 12 described devices:
Modular converter is used for obtaining the common-mode signal of said n each twisted-pair feeder channel of twisted-pair feeder channel, under said different schemes, said common-mode signal is carried out digital processing to generate m extended channel respectively;
Control module is used for controlling said modular converter carries out digital processing to said common-mode signal mode to obtain said different schemes respectively.
14. device as claimed in claim 13 is characterized in that, said extended channel generation unit further comprises:
Receiver module; Be used for the receive channel extend information; Under said different schemes, utilize said channel expansion information that said common-mode signal is carried out digital processing generating m extended channel respectively, said channel expansion information comprise twisted-pair cable that the user uses to quantity, whether generate the cascade extended channel.
15., it is characterized in that said extended channel generation unit comprises like claim 11 or 12 described devices:
Control module and one group of electronic switch; Said control module is controlled said one group of electronic switch and is adopted different on off state combinations to generate said different schemes respectively; Said different on off states combination is corresponding one by one with said different schemes; According to each on off state combination, the state of controlling each switch in said one group of electronic switch is to generate m extended channel.
16. the device of an extended channel is characterized in that, comprising:
Twisted-pair feeder channel selected cell is used for selecting at random respectively from N twisted-pair feeder channel n twisted-pair feeder channel of various combination, n＞2 wherein, N＞n;
Middle scheme selected cell; Be used to use n twisted-pair feeder channel; Adopt different schemes to generate m different extended channels respectively; Each scheme in the said different schemes all generates m extended channel; Wherein, N＞2, m≤n-1, m extended channel comprises at least one extended channel; Wherein, Extended channel is divided into non-cascade extended channel and cascade extended channel, and each non-cascade extended channel is generated by two twisted-pair feeder channels, and each 1 grade of cascade extended channel is generated by two non-cascade extended channels; Or; Generate each L level cascade extended channel, wherein L＞1 by a non-cascade extended channel and a twisted-pair feeder channel; Generate by two L-1 level cascade extended channels; Or, generate by a L-1 level cascade extended channel and a non-cascade extended channel, or; Generate by a L-1 level cascade extended channel and a twisted-pair feeder channel; Or, generate by a L-1 level cascade extended channel and a L-i level cascade extended channel, wherein i＞1; The overall performance parameter value of m the extended channel that obtains respectively to generate under the said different schemes; The overall performance parameter value of the m that generates under a more said different schemes extended channel, and select the corresponding scheme of one of them non-minimum value P;
The final scheme selected cell is used for the corresponding non-minimum value P of n twisted-pair feeder channel of more said various combination and selects the corresponding scheme of one of them non-minimum value.
17. an extended channel device is characterized in that, comprising:
Measuring unit is used for using n twisted-pair feeder channel to carry out the channel expansion process, and wherein, n＞2 when using two channels to generate an extended channel, are measured the crossfire value of two interchannels of this channel combination of composition in the different channels combination respectively;
Selected cell is used for more said crossfire value, and selects in the said crossfire value two channels in the corresponding channel combination of non-minimum value to generate extended channels.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/076849 WO2012106865A1 (en) | 2011-07-05 | 2011-07-05 | Method and device for generating expanded channels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102308486A true CN102308486A (en) | 2012-01-04 |
| CN102308486B CN102308486B (en) | 2014-04-02 |
Family
ID=45381261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180001371.6A Active CN102308486B (en) | 2011-07-05 | 2011-07-05 | Method and apparatus for generating expansion channel |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102308486B (en) |
| WO (1) | WO2012106865A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015135500A1 (en) * | 2014-03-14 | 2015-09-17 | Huawei Technologies Co., Ltd. | Method and apparatus for providing twisted pair multilink communications |
| WO2016101420A1 (en) * | 2014-12-24 | 2016-06-30 | 中兴通讯股份有限公司 | Vector calculation method and apparatus for removing far-end crosstalk of subscriber line |
| WO2018120216A1 (en) * | 2016-12-30 | 2018-07-05 | 华为技术有限公司 | Method and transmission terminal device for controlling on and off states of transceiver |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2137750A (en) * | 1983-03-31 | 1984-10-10 | Teledyne Exploration Co | Modular Seismic Cable Section |
| US5485488A (en) * | 1994-03-29 | 1996-01-16 | Apple Computer, Inc. | Circuit and method for twisted pair current source driver |
| CN1350392A (en) * | 2000-10-11 | 2002-05-22 | 日本电气株式会社 | Method for measuring and improving data subscriber transmitting characteristics |
| CN1669254A (en) * | 2002-05-15 | 2005-09-14 | 希尔纳公司 | High grade binding of multi-access line for carrier grade access |
| US20060104436A1 (en) * | 2004-11-17 | 2006-05-18 | Alexander Tesler | Method of transmitting DSL data over 2 POTS loops |
| CN1805305A (en) * | 2005-01-13 | 2006-07-19 | 松下电器产业株式会社 | Adaptive space-time transmit diversity method and apparatus by means of antenna selection |
| WO2006075247A1 (en) * | 2005-01-14 | 2006-07-20 | Piping Hot Networks Limited | Data, power and supervisory signaling over twisted pairs |
| CN102104455A (en) * | 2011-03-04 | 2011-06-22 | 华为技术有限公司 | Remote-end multiple input multiple output method, distributing cabinet and system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7394752B2 (en) * | 2001-11-06 | 2008-07-01 | The Board Of Trusttees Of The Leland Stanford Junior University | Joint reduction of NEXT and FEXT in xDSL systems |
| CN1933522B (en) * | 2005-12-13 | 2011-05-11 | 华为技术有限公司 | DSL signal transmitting system and method |
| CN101136659B (en) * | 2006-08-28 | 2012-01-25 | 华为技术有限公司 | Method, system and equipment for crosstalk elimination of xDSL multiple lines |
| CN101917212B (en) * | 2010-08-11 | 2013-01-23 | 华为技术有限公司 | xDSL system, signal transmission method thereof, transmission device and reception device |
-
2011
- 2011-07-05 CN CN201180001371.6A patent/CN102308486B/en active Active
- 2011-07-05 WO PCT/CN2011/076849 patent/WO2012106865A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2137750A (en) * | 1983-03-31 | 1984-10-10 | Teledyne Exploration Co | Modular Seismic Cable Section |
| US5485488A (en) * | 1994-03-29 | 1996-01-16 | Apple Computer, Inc. | Circuit and method for twisted pair current source driver |
| CN1350392A (en) * | 2000-10-11 | 2002-05-22 | 日本电气株式会社 | Method for measuring and improving data subscriber transmitting characteristics |
| CN1669254A (en) * | 2002-05-15 | 2005-09-14 | 希尔纳公司 | High grade binding of multi-access line for carrier grade access |
| US20060104436A1 (en) * | 2004-11-17 | 2006-05-18 | Alexander Tesler | Method of transmitting DSL data over 2 POTS loops |
| CN1805305A (en) * | 2005-01-13 | 2006-07-19 | 松下电器产业株式会社 | Adaptive space-time transmit diversity method and apparatus by means of antenna selection |
| WO2006075247A1 (en) * | 2005-01-14 | 2006-07-20 | Piping Hot Networks Limited | Data, power and supervisory signaling over twisted pairs |
| CN102104455A (en) * | 2011-03-04 | 2011-06-22 | 华为技术有限公司 | Remote-end multiple input multiple output method, distributing cabinet and system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015135500A1 (en) * | 2014-03-14 | 2015-09-17 | Huawei Technologies Co., Ltd. | Method and apparatus for providing twisted pair multilink communications |
| US9473240B2 (en) | 2014-03-14 | 2016-10-18 | Futurewei Technologies, Inc. | Method and apparatus for providing twisted pair multilink communications |
| WO2016101420A1 (en) * | 2014-12-24 | 2016-06-30 | 中兴通讯股份有限公司 | Vector calculation method and apparatus for removing far-end crosstalk of subscriber line |
| WO2018120216A1 (en) * | 2016-12-30 | 2018-07-05 | 华为技术有限公司 | Method and transmission terminal device for controlling on and off states of transceiver |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012106865A1 (en) | 2012-08-16 |
| CN102308486B (en) | 2014-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101567120B1 (en) | Alien interference removal in vectored dsl | |
| CN101174855B (en) | Spectrum management method and apparatus | |
| CN101399575B (en) | Method and device for controlling sending power of DSL line | |
| CN103229445B (en) | A kind of initial method of circuit and equipment | |
| CN101652933B (en) | Arrangements in a digital subscriber line system | |
| CN101083553A (en) | XDSL up-downlink sharing frequency dynamic spectrum managerial approach and apparatus | |
| AU2005226164A1 (en) | High speed multiple loop DSL system | |
| CN102217294A (en) | Method and apparatus for reducing feedback overhead during crosstalk precoder initialization | |
| CN101908909B (en) | Far end crosstalk channel estimation method and device | |
| US6760434B1 (en) | Dual impedance hybrid | |
| Chan | Performance analysis of telecommunications and local area networks | |
| CN102308486B (en) | Method and apparatus for generating expansion channel | |
| Cioffi et al. | Cupon: the copper alternative to pon 100 gb/s dsl networks [accepted from open call] | |
| CN101459447B (en) | Dynamic spectrum management method for reducing cross talk interference of digital subscriber line | |
| CN106464460B (en) | Bit loading method, transmitting terminal, receiving end and the system of nonlinear precoding | |
| CN100492998C (en) | Method for testing asymmetric digital user outgoing rate | |
| EP2490363B1 (en) | Method, device and system for extending channels | |
| US20040017902A1 (en) | Configurable multi-port modem to achieve a high bit rate in a DSL system | |
| CN102067467A (en) | Method and device for data processing and communication system comprising such device | |
| CN101729094B (en) | Uplink power decreasing method, device and system in digital subscriber lines | |
| CN102165724B (en) | A kind of methods, devices and systems reducing subscriber's line crosstalk | |
| CN105723790B (en) | A kind of data transmission device and method | |
| CN104641567A (en) | Method, device and system for detecting disturbing line | |
| CN101420334B (en) | Processing method and device for signal crosstalk, spectrum management system | |
| CN102104455A (en) | Remote-end multiple input multiple output method, distributing cabinet and system |
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 |