WO2012106865A1

WO2012106865A1 - Method and device for generating expanded channels

Info

Publication number: WO2012106865A1
Application number: PCT/CN2011/076849
Authority: WO
Inventors: 吕捷; 方李明; 董卉慎
Original assignee: 华为技术有限公司
Priority date: 2011-07-05
Filing date: 2011-07-05
Publication date: 2012-08-16
Also published as: CN102308486A; CN102308486B

Abstract

Disclosed are a method and device for generating expanded channels. The method includes: generating m different expanded channels using n twisted-pair channels and adopting different solutions respectively, wherein each of the different solutions generates m expanded channels, n > 2, m ≤ n-1, and the expanded channels are divided into non-cascade expanded channels and cascade expanded channels; respectively acquiring comprehensive performance parameter values of the m expanded channels generated under the different solutions; and comparing the comprehensive performance parameter values of the m expanded channels generated under the different solutions, and selecting the solution corresponding to a non-minimum value P. By way of the embodiments of the present invention, a superior or optimal expanded channel solution can be intelligently selected, so that the expanded channel has better performance and hence the SuperMIMO system has better performance.

Description

Method and apparatus for generating an extended channel

Technical field

The present invention relates to the field of data communications, and in particular to a method and apparatus for generating an extended channel. Background technique

Twisted pair is a kind of universal wiring made by two mutually insulated wires entangled with each other according to certain specifications, and belongs to the information communication network transmission medium. The twisted pair is divided into a shielded twisted pair STP (Shielded Twistedpair) and an unshielded twisted pair UTP (Unshielded Twisted Pair). UTP is widely used in Ethernet and telephone lines. A UTP consisting of four pairs of different color transmission lines is commonly used for Ethernet data transmission. In a telephone trunk, a number of UTP pairs (such as 25 pairs, 100 pairs or more) are typically combined to form a cable. There are various technologies for transmitting signals based on UTP, among them, Asymmetric Digital Subscriber Line (ADSL), High Bit Rate (DSL), and High-Speed Digital Subscriber Line (VDSL) (Very High Speed). Technologies such as Digital Subscriber Line) already have a broad application base. For the convenience of description, technologies such as ADSL, HDSL, and VDSL are collectively referred to as xDSL technology.

Traditionally, xDSL technology based on UTP transmission signals usually transmits N to UTP as N channels. With the further development of high-speed services, the communication capacity of xDSL technology and the access rate provided by it have gradually failed to meet the needs of users. To this end, the prior art proposes a method for extending a channel, which uses a series common mode to extend N-1 channels on the basis of N channels of N to UTP, so that the number of channels after expansion reaches 2N- One. The method expands a new channel between every two pairs of adjacent UTPs, and the transmission mode of the original channel is unchanged, and the differential mode of the channel is still used to transmit signals, and the transmission signals on the extended channel are transmitted. Then, it is divided into two parts, which are respectively transmitted by using a common mode CM (Common Mode) of two original channels for generating the extended channel, and the common mode signals on the two channels are differentiated at the receiving end to obtain a signal of the extended channel. .

Crosstalk between multiple pairs of twisted pairs in a bundle of cables, and between twisted pair channels and extended channels, crosstalk can greatly degrade the performance of xDSL. Crosstalk cancellation techniques can be used to eliminate crosstalk between channels. Existing vectorized Vector technology that eliminates crosstalk between channels, enabling xDSL The performance is greatly improved.

In order to provide users with higher access rates, multiple pairs of twisted pair resources from P1 to P are usually bound, and multiple transceivers are used for joint reception and transmission. The joint transmission and reception cooperates with the above channel extension technology and crosstalk. Eliminating the technology, a Super Multiple-input and Multiple-Output Digital Subscriber Line (Super DSL) transmission system as shown in FIG. 1 is formed.

The connection between the Digital Subscriber Line Access Multiplexer (DSLAM) and the Customer Premises Equipment (CPE) is shown in Figure 2. The DSLAM is connected by cable to the MDF (Main Distribution Frame). The MDF has a connection terminal that can be switched to connect the central office equipment to different pairs of trunk cables. The backbone cable is generally composed of many bundles of cables, each bundle of 100 pairs or more twisted pairs. Therefore, the MDF is generally connected with thousands or even tens of thousands of subscriber lines, that is, twisted pairs. The size of the distribution cable is smaller than that of the backbone cable. Generally, there are several hundred pairs of subscriber lines. The distribution cable is connected through the junction box and the backbone cable. Similarly, the junction box also has a connection terminal to switch the connection sequence. Finally, the subscriber line arrives at the customer premises equipment CPE through the distribution box. If SuperMIMO technology is used, at least 2 pairs need to reach the user side.

Since the MDF and the junction box have connection terminals that can be switched, the DSLAM to the user side can be selected and can be different for the subscriber line. In general, before the service is opened, the operator has completed the connection between the MDF and the transfer box. Which users are used to open the service has been determined, and these determined subscriber lines can be used for channel expansion. If the subscriber line to be used is selected from the subscriber line that is more than the number of subscriber line pairs to be used before determining the subscriber line pair to be used by the subscriber, then the subscriber line to be used for channel extension based on these determinations is used. .

The prior art provides a method of extending a channel in a Super MIMO system, but a channel extension scheme for extending a channel based on a twisted pair channel to obtain a desired number and type of extension channels is different if different, different extension channel schemes are different The performance of the extended channel generation scheme with poor performance will affect the quality of service provided to the end user. Summary of the invention

In the SuperMIMO system, the poor performance of the extended channel generation scheme will result in the overall performance of the SuperMIMO system is not high, affecting the rate of the SuperMIMO system.

In one aspect, an embodiment of the present invention provides a method for generating an extended channel, including: generating n different extended channels by using different schemes using n twisted pair channels, each of the different solutions. Generating m extension channels, where n > 2, mn - 1, wherein the extension channel is divided into a non-cascading extension channel and a cascade extension channel, and each non-cascade extension channel is generated by two twisted pair channels, each The level 1 cascaded extension channel is generated by two non-cascaded extension channels, or is generated by a non-cascading extension channel and a twisted pair channel, each L level cascades the extension channel, where L>1, by two L-level cascading extended channel generation, or, generated by an L-1 cascading extension channel and a non-cascading extension channel, or by an L-1 cascading extension channel and a twisted pair channel Generating, or, generated by an L-1 level cascade extension channel and an L-i level cascade extension channel, where i > l;

Obtaining overall performance parameter values of the m extended channels generated by the different schemes respectively; comparing the total performance parameter values of the m extended channels generated by the different schemes, and selecting a scheme corresponding to one of the non-minimum Ps.

In another aspect, an embodiment of the present invention provides a method for generating an extended channel, including: in a channel spreading process using n twisted pair channels, where n > 2, when two channels are used to generate an extended channel , respectively measuring crosstalk values between two channels constituting the channel combination in different channel combinations;

Comparing the crosstalk values, and selecting two of the channel combinations corresponding to one of the crosstalk values to generate an extension channel.

In another aspect, an embodiment of the present invention provides an apparatus for generating an extended channel, including: an extended channel generating unit, configured to generate different m extended channels by using different schemes by using n twisted pair channels, Each of the different schemes generates m extension channels, where n > 2, mn - 1, m extension channels include at least one extension channel, wherein the extension channel is divided into a non-cascading extension channel and a cascade extension channel , each non-cascading expansion channel consists of two twisted pairs Channel generation, each level 1 cascaded extension channel is generated by two non-cascaded extension channels, or by a non-cascaded extension channel and a twisted pair channel, each L level cascades the extension channel, where L> 1, generated by two L-1 level cascaded extension channels, or generated by an L-1 level cascaded extension channel and a non-cascaded extension channel, or by an L-1 level cascaded extension channel and one The twisted pair channel is generated, or generated by an L _ 1 cascading extension channel and an L _ i cascading extension channel, where i >l;

a performance parameter obtaining unit, configured to respectively obtain an overall performance parameter value of the m extended channels generated by the different schemes;

And a selecting unit, configured to compare the total performance parameter values of the m extended channels generated by the different schemes, and select one of the non-minimum corresponding schemes.

In another aspect, an embodiment of the present invention provides an apparatus for generating an extended channel, including: a twisted pair channel selecting unit, configured to randomly select n twisted pairs of different combinations from N twisted pair channels respectively. Channel, where n > 2, N > n;

The intermediate scheme selecting unit is configured to generate different m extended channels by using different schemes by using n twisted pair channels, and each of the different schemes generates m extended channels, where n > 2, mn - 1, m extension channels include at least one extension channel, wherein the extension channel is divided into a non-cascading extension channel and a cascade extension channel, and each non-cascade extension channel is generated by two twisted pair channels, each level 1 The cascading extension channel is generated by two non-cascading extension channels, or by a non-cascading extension channel and a twisted pair channel, each L-level cascading extended channel, where L>1, by two L- Level 1 cascaded extension channel generation, or generated by an L-1 level cascade extension channel and a non-cascading extension channel, or generated by an L-1 level cascade extension channel and a twisted pair channel, or And generating, by an L _ 1 tier cascading extension channel and an L _ i cascading extension channel, where i > 1 ; respectively obtaining overall performance parameter values of the m extension channels generated by the different schemes; Comparing the overall performance parameter values of the m extended channels generated under the different schemes, and selecting one of the schemes corresponding to the non-minimum P;

The final scheme selection unit is configured to compare the non-minimum values P corresponding to the different twisted pair channels of the different combinations and select one of the non-minimum schemes. In another aspect, an embodiment of the present invention provides an apparatus for generating an extended channel, including: a measuring unit, configured to perform channel expansion using n twisted pair channels, where n > 2, using two channels When generating an extended channel, respectively measuring crosstalk values between two channels constituting the channel combination in different channel combinations;

And a selecting unit, configured to compare the crosstalk value, and select two channels in a channel combination corresponding to one of the crosstalk values to generate an extended channel. The embodiment of the present invention can intelligently select and select a better or optimal extended channel scheme, so that the extended channel has better performance, so that the Super MIMO system has better performance. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly described, and the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

Figure 1 is a schematic diagram of a SuperMIMO DSL transmission system.

Figure 2 is a schematic diagram of the connection of DSLAM to CPE

FIG. 3 is a schematic diagram of a channel extension method according to an embodiment of the present invention;

4 is a schematic diagram of transmission of an extended channel signal according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of multiple channel expansion schemes according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of multiple channel expansion schemes according to an embodiment of the present invention;

FIG. Ί is a schematic diagram of a method for generating an extended channel according to an embodiment of the present invention

FIG. 8 is a schematic diagram of common mode signal processing according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a Supe rMIMO channel initialization process according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of an electronic switch circuit according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a method for generating an extended channel according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of a method for generating an extended channel according to an embodiment of the present invention;

FIG. 13 is a schematic diagram of a method for generating an extended channel according to an embodiment of the present invention; FIG. 14 is a schematic diagram of generating an extended channel device according to an embodiment of the present invention;

FIG. 15 is a schematic diagram of generating an extended channel device according to an embodiment of the present invention;

16 is a schematic diagram of generating an extended channel device according to an embodiment of the present invention;

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

When the channel is extended based on the twisted pair channel, the generated extended channel is divided into a non-cascading extended channel and a cascaded extended channel. If both channels used to generate the extended channel are twisted pair channels, the generated extended channel is Non-cascading extended channel (CEC); if one of the two channels used to generate the extended channel is already an extended channel, then the generated extended channel is the Cascading Extended Channe l . The non-cascading extension channel is generated by two twisted pair channels, and the level 1 cascaded extension channel is generated by two non-cascading extension channels, or by one non-cascading extension channel and one twisted pair channel, L greater than 1 A cascaded extension channel, generated by two L_1 cascaded extension channels, or generated by an L-1 level cascaded extension channel and a non-cascaded extension channel, or by an L-1 level cascade The extension channel and a twisted pair channel are generated, or are generated by an L-1 level cascade extension channel and an L-i level cascade extension channel, L>l, i>l above.

When NCEC and CEC are implemented with the center tap, the common mode signal on the center tap of the two channels can be used to differentiate to generate an extended channel. Using the above method, n-1 NCEC or CEC extension channels can be generated from any number of natural twisted pairs of 2 or more pairs, each twisted pair pair corresponding to one twisted pair channel.

As shown in FIG. 3, a circuit of one channel is generated by using four pairs of twisted pairs P1, P2, P3, and P4. Wherein, P1, Ρ2, Ρ3, Ρ4 are connected at the transmitting end to the output ends of the transformer 1, the transformer 2, the transformer 3, and the transformer 4, respectively, and are connected at the receiving end to the input end of the corresponding transformer, respectively, 3 and 4 in the figure, respectively Indicates two inputs or two outputs of the transformer; draw 1, draw 2, draw 3, draw 4 is 4 Ordinary differential mode twisted pair channel, through the transformer 1 and the intermediate tap 5 of the transformer 2, the NCEC1 channel is generated by the DM1 and the picture 2, and the NCEC1 is input through the transformer 5 at the transmitting end; through the intermediate tap 5 of the transformer 3 and the transformer 4, Drawing 3 and drawing 4 generate the NCEC2 channel, NCEC2 is input through the transformer 6 at the transmitting end, and through the transformer 5 and the intermediate tap 5 of the transformer 6, the CEC channel is generated by NCEC1 and NCEC2, and the CEC is input through the transformer 发送 at the transmitting end.

Figure 4 illustrates from the signal level how the extended channel signal is transmitted over the twisted pair. The four pairs of UTP correspond to four twisted pair channels IP ₂ , Ρ ^. Ρ ₄ , the extension gets two NCEC channels: NCEC1 channel and NCEC2 channel, and one CEC channel. The signals transmitted by the NCEC1 channel, the NCEC2 channel, and the CEC channel at the transmitting end are Xi, x _2, and x ₃ , respectively, and the signals received at the receiving end are yi, y _2, and y _{3 , respectively} . The transmitted signals on each of the extended channels are divided into two equal-sized, opposite-direction signals and transmitted as common-mode signals of the twisted-pair channels. Among them, the ₁ signal on the NCEC1 channel is divided into + _Xl /2 and _-Xl /2, which are respectively transmitted as the common mode signal of the channel and the common mode signal of the P ₂ channel. The x ₂ signals on the NCEC2 channel are divided into +x ₂ /2 and -x ₂ /2, which are respectively transmitted as a common mode signal of the P ₃ channel and a common mode signal of the P t channel. The x ₃ signals on the CEC channel are divided into +x ₃ /2 and -x ₃ /2, which are respectively transmitted as common mode signals of the NCEC1 channel and common mode signals of the NCEC2 channel, where they are divided into +x ₃ / when passing through the NCEC1 channel. 4 and +x ₃ /4, respectively, are transmitted as a common mode signal of the Pi channel and a common mode signal of the P ₂ channel, and are divided into -x ₃ /4 and -x ₃ /4 through the NCEC2 channel, respectively as P ₃ channels The common mode signal and the common mode signal of the P ₄ channel are transmitted. The transmission and reception of the common mode channel to each pair of twisted pairs is accomplished by connecting the center tap of the transformer in Figure 1. Sending an X signal to the center tap of the transformer will produce an X/2 signal on the line connecting the taps on both sides, thereby achieving the purpose of transmitting a common mode signal.

As shown in FIG. 5, the extended channel is generated by using the differential mode of the common mode signal. If there are 4 twisted pair pairs P1, P2, P3, and P4, the extended channel to be generated is: 2 non-cascading extended channels, 1 The level 1 cascaded extension channel and the level 1 cascaded extension channel are generated by two non-cascaded extension channels. In this mode, four pairs of lines can have three different generation schemes:

501: Generate CEC1, P2, P3 with P1, P4 to generate CEC2, and NCEC1 and CEC2 to generate CEC.

502: Generate NCEC1, P3, and P4 with PI and P2 to generate NCEC2, NCEC1 and NCEC2.

CEC. 503: Generate NCEC1, P2, P4 with Pl, P3 to generate NCEC2, NCEC1 and NCEC2

CEC.

Of course, the extended channel that needs to be generated may also be: 1 non-cascading extended channel, 1 level 1 cascaded extended channel generated by non-cascading extended channel and twisted pair channel, and 1 by 1 level A 2-stage cascaded extension channel generated by a joint extension channel and a twisted pair channel. In this mode, there are three generation schemes as shown in FIG. 6:

601: Generate NCEC1 with P1, P4, CEC1 for P2 and NCEC1, and CEC2 for CEC1 and P3. 602: Generate CEC1 with P1, P4, CEC1 for P3 and CEC1, and CEC2 for CEC1 and P2. 603: Generate NCEC1 with P1, P3, CEC1 for P2 and NCEC1, and CEC2 for CEC1 and P4. As shown in the three schemes in FIG. 5 and the schemes in 3 in FIG. 6, although three extension channels are generated, the performance of the generated extension channels may be different, and embodiments of the present invention provide different extensions. A method of selecting a better performance scheme in the channel scheme.

After the user wiring is determined, that is, the n twisted pair channels to be used by the CPE have been determined, and the method 700 shown in FIG. 7 can be adopted, and the different schemes for generating the extended channel by the n twisted pair channels are selected. A better performing solution, the method includes:

701: Using different twisted pair channels, respectively, different schemes are used to generate different m extended channels, and each of the different schemes generates m extended channels, where n > 2, m n - 1 ;

703: Obtain an overall performance parameter value of the m extended channels generated by the different schemes respectively; 705: compare an overall performance parameter value of the m extended channels generated by the different schemes, and select one of the non-minimum P values. Corresponding scheme.

Different schemes in 701 may have the same mode, that is, between different schemes: the number of non-cascading extension channels is the same, and the number of cascaded extension channels is the same and each level 1 expansion expansion is generated. The two channels of the channel are of the same type, and the number of L-level cascaded extension channels of each level is the same, the types of the two channels that generate the L-level cascaded extension channel are respectively the same, and the cascade expansion of the two channels The levels of the channels are the same. For example, the three scenario modes in Figure 5 are the same, and the three scenario modes in Figure 6 are the same. Of course, different schemes may also have different modes, such as 501 in FIG. 5 and 601 in FIG. 6. Taking FIG. 5 as an example, three extended channels including two NCECs and one CEC can be generated by using four twisted pair channels, and 501, 502, and 503 represent different schemes, and three extension channels are generated in each scheme. The channel combinations used are different. NCEC1, NCEC2 and CEC are generated between the three schemes. Different channel combinations are used respectively. For example, the channel combination for generating NCEC1 in 501 is P1 and P4, and the channel for generating NCEC1 in 502 is generated. The combination is PI and P2, and 503 is PI and P3.

Taking FIG. 6 as an example, three extended channels including one NCEC and two CECs can be generated by using four twisted pair channels, and 601, 602, and 603 are different schemes, and NCEC1 is generated between 601 and 602. The channel combinations are the same, both P1 and P4, but the channel combinations for generating CEC1 are different, and the channel combinations for generating CEC2 are also different. Between 601 and 603, although CEC1 is generated by NCEC1 and P2, since the channel combinations used to generate NCEC1 are different, the channel combinations for generating CEC1 are also different.

Figure 5 and Figure 6 show the case where three extended channels are generated by four twisted pair channels. Of course, only four NCECs can be generated with four twisted pair channels, or only one NCEC and one one can be generated. In CEC, there are different scenarios for generating extended channels in both cases.

When n is the p-th power of 2, where p 2 generates n - 1 extended channels, all n twisted-pair channels are used to generate non-cascading extended channels, using all non-cascading extended channels. Generating a level 1 cascaded extension channel, each level 1 cascaded extension channel is generated by only two non-cascaded extension channels, starting with a level 1 cascaded extension channel, and if the level of the cascaded extension channel is not one, then all are used The cascaded expansion channels of the two levels generate a higher level of cascaded extension channels, and so on, until only one of the highest level cascaded extension channels is generated, and each of the L-level cascaded extension channels consists of only two Ls. - Level 1 cascading extended channel generation, there may be multiple different schemes for channel extension according to the above manner, and the overall performance parameters of n - 1 extended channels generated under different schemes may be respectively obtained, and overall performance parameter values are selected therefrom In a non-minimum corresponding scheme, preferably, the non-minimum value is a maximum value.

When the n twisted pair channels are only connected to one end of the central office CO (Cen ra l Off i ce ) or the user terminal equipment CPE ( Cus tomer Pre s es Equ i pment ), the method described below may be adopted. The overall performance parameter values of the m extended channels generated under the different schemes are respectively obtained.

Since the characteristics of each pair are not exactly the same, the extended channel consisting of two pairs is flat. The performance of the balance will be worse than the channel of the ordinary twisted pair. Longitudinal balance

LB (Long i tudina l Ba lance) to measure. In addition to the vertical balance, the line balance is measured by the Long Conversion Rate LCL (Long i tudina l convers ion Los s). The balance of the line is an important factor affecting the signal transmission. Therefore, when selecting the extended channel, the extended channel with good balance can be selected.

Taking FIG. 5 as an example, when the scheme 501 is adopted, the longitudinal balance degrees of the NCEC1, NCEC2, and CEC are respectively measured; the scheme is switched to the scheme 502, and the longitudinal balance degree of each extension channel is measured; and the scheme 503 is switched to measure the longitudinal balance of each extension channel. The sum of the longitudinal balances of each of the three schemes is calculated separately, and the sum of the obtained longitudinal balances can be used as an overall performance parameter to characterize the generated three extension channels. It is possible to select a scheme in which the sum of the longitudinal balances is not the smallest, and preferably, the scheme in which the sum of the longitudinal balances is the largest can be selected.

The smaller the crosstalk between the generated extended channels, the smaller the mutual influence between them. Therefore, the performance of the extended channel can be evaluated by measuring the crosstalk between multiple extended channels generated under different schemes, and then selecting The overall crosstalk between the extended channels is not the largest extended channel scheme. Preferably, the scheme with the smallest overall crosstalk can be selected.

Crosstalk includes near-end crosstalk NEXT (Near End Crosss s lk lk) and far-end crosstalk FEXT (Far End Crosss s lk lk ). Crosstalk can be differential mode crosstalk, i.e., differential mode signals are transmitted on one channel and differential mode crosstalk signals are received on other channels/lines. In addition to using differential mode crosstalk, the crosstalk described in the embodiment of the present invention can also use common mode crosstalk, that is, transmitting a common mode signal on one channel/line and receiving a common mode crosstalk signal on other channels/lines. The advantage of using common mode crosstalk is that common mode crosstalk is more intense than differential mode crosstalk and is easier to measure.

Taking Figure 5 as an example, switch to scheme 501 to measure crosstalk between NCEC 1, NCEC 2, and CEC. Similarly, switch to schemes 502 and 503, measure crosstalk between NCEC1, NCEC2, and CEC, and calculate under different schemes. The sum of the crosstalk between the extended channels, the reciprocal of the sum of the crosstalks can be used as a parameter to characterize the overall performance of the extended channel. When n twisted pair channels are connected to only one of the CO or CPE, the measured crosstalk can be near-end common mode crosstalk or near-end differential mode crosstalk at the connection end. The reciprocal of the sum of the crosstalk of the respective channels, or the reciprocal of the sum of the energy of the crosstalk, may be selected, preferably, You can choose the one with the largest overall performance parameters.

When n twisted pair channels are connected to both C0 and CPE, the performance parameter values characterizing the overall activation rate of the m extended channels are obtained as described in 703, except that the longitudinal balance and the near side can be measured from any one of the connections. In addition to the end crosstalk, it is also possible to measure the far-end crosstalk, activation rate, reachability rate, signal-to-noise ratio, attenuation and other performance indicators of each extended channel, and correspondingly use the reciprocal of the sum of the crosstalk, the sum of the activation rates, and the reachable rate. The sum of the sum, the sum of the signal-to-noise ratio, and the sum of the attenuations is used as an overall performance parameter to characterize the m extended channels.

The specific measurement process described above can be implemented using a DSL chipset.

Specifically, the m extension channels are generated by using different schemes as described in 701, and can be implemented by using a device similar to that shown in FIG. Figure 8 takes four pairs of wires as an example. The pair of wires P1, P2, P3, and P4 are connected to the output terminals 3 and 4 of the transformer 1, the transformer 2, the transformer 3, and the transformer 4, respectively, and the intermediate taps 5 of the respective transformers are respectively associated with the respective common modes. The signal transceiver is connected, and the conversion module obtains the common mode signal of each twisted pair channel through the common mode signal transceiver and processes the common mode signal to generate an extended channel. The control module controls the manner in which the common mode signals are digitally processed in the conversion module to obtain different channel expansion schemes, respectively. The control module can be implemented using a DSL chipset. After the extended channel scheme is determined, the selected extended channel scheme can be notified to the opposite end.

The existing DSL initialization process includes a handshake phase, a channel discovery phase, a training phase, a channel analysis, and an interaction phase. The existing DSL channel initialization process is for the initialization of a DSL channel. SuperMIMO initialization is a joint initialization process for multiple channels. In the SuperMIMO initialization phase, multiple channels are simultaneously initialized in SuperMIMO.

During the SuperMIMO initialization process, the initialization of the channel may include an extended channel scheme determination phase. An example of a SuperMIMO channel initialization procedure is shown at 900 in Figure 9, which includes a SuperMIMO handshake phase 901, an extended channel scheme determination phase 903, a channel discovery phase, a training phase, a channel analysis, and an interaction phase. The SuperMIMO user basic information can be exchanged in the SuperMIMO handshake phase 901.

Further, the channel extension information may be in the capability list CL (Capabilities List), the capability 歹 'J table + CLR (Capabilities List + Request), the mode clearing MR (Model Reques t), mode selection MS (Mode l Se l ec t ), mode recommendation MP (Mode Proposa l ) and other messages are transmitted, the transceiver obtains the channel extension information of the peer end from the received counterpart message, and sends a message to respond . In the channel extension information, the twisted pair logarithm parameter used by the SuperMIMO user is used to notify the conversion module to obtain which twisted pair common mode signals are used to construct the extended channel, and whether to use the cascaded extended channel generation mode parameter for Notify the conversion module whether to use the CEC channel. If CEC is not used, only NCEC is generated, and after the NCEC is generated, it will not continue to expand to generate CEC.

The expansion channel is generated by using different schemes as described in 701, and can also be implemented by an electronic switch similar to that shown in FIG. Taking the different extended channel schemes in FIG. 5 as an example, the switch states of the three switches 1001, 1002, and 1003 shown in FIG. 10 form a switch state combination, indicating that P1 and P2 constitute NCEC1, and P3 and P4 constitute NCEC2, corresponding to In the channel expansion scheme 502 of FIG. 5, the control unit controls the switching states of the three switches. The above three switches can also be combined with other switch states to correspond to the 501, 503 scheme in Fig. 5. Therefore, corresponding to a certain scheme, different schemes, one set of electronic switches can be controlled to adopt different combinations of switch states to implement different schemes, and the switch states of the electronic switches in a group of electronic switches form a switch state combination, and different switch state combinations Corresponding to different schemes, different combinations of switch states are the same as different schemes. An electronic switch is a device that can be controlled by a program or physical button to connect different pins.

The channel extension scheme selection process described above can be implemented in the initialization process of SuperMIMO in 900. For example, after the SuperMIMO handshake phase, before the channel discovery phase, n twisted pair channels to be used by the CPE are used, and different schemes are generated. For different m extension channels, the overall performance parameter of the generated m extension channels is selected to be non-minimum, and then the extension channel generated under the scheme is initialized. Preferably, the scheme with the largest overall parameter value can be selected.

Before the wiring is determined, if the twisted pair to be used by the user CPE has not been determined, the number N of twisted pairs available is greater than the number n of twisted pairs to be used, and the difference between the N pairs can be selected. Combining n pairs of lines, for different combinations of n pairs, use the above method to select a scheme, and then compare the schemes selected under different combinations, and then select a scheme from them. Can be opened in the operator Route selection before the service to get the best performance for the user.

When the above selection line is made, since the wiring has not been determined yet, the CPE is generally not connected, and can be selected by the signal transmitted by the central office CO (Cen ra l Off i ce ) DSLAM.

The n twisted pair channels described in 701 can be randomly selected from the twisted pair channels, and the extended channel scheme selection process can further include the following processing as shown in FIG.

1101: randomly select M sets of twisted pair channels from the N twisted pair channels, where M > 1, each group includes n twisted pair channels, and each set of n twisted pair channels is The n twisted pair channels are different, and the corresponding non-minimum corresponding scheme is selected for the n twisted pair channels in each group, and the non-minimum corresponding to the kth group is P _k , k = l , 2. . M. Preferably, the scheme corresponding to the maximum value can be selected.

1103: Compare the P and Pi, P ₂ . . . P _M and select one of the non-minimum corresponding schemes. Preferably, the scheme corresponding to the maximum value can be selected.

Since the twisted pair channel is connected to C0, parameters for characterizing the overall performance of the generated extended channel can be obtained by measuring the longitudinal balance of the extended channel; or when the generated extended channel is greater than one, the near end of the CO end between the extended channels can be measured. End common mode crosstalk or near-end differential mode crosstalk, obtaining parameters characterizing the overall performance of the generated extended channel.

In the process of generating the extended channel, it is possible to select which two extended channels are used to generate an extended channel by measuring crosstalk between two extended channels used to generate an extended channel, and an extended channel provided by an embodiment of the present invention The method is shown as 1200 in Figure 12, and the method includes:

1201: In the process of channel extension using n twisted pair channels, where n > 2, when two channels are used to generate one extended channel, respectively, between two channels constituting the channel combination in different channel combinations are respectively measured Crosstalk value

1203: Compare the measured crosstalk values, and select two channels in the channel combination corresponding to one of the crosstalk values to generate an extended channel.

Further, the two channels constituting the channel combination in the different channel combinations described in 1201 are two twisted pair channels, and the two twisted pair channels can generate one non-cascading extended channel; or, both are one A twisted pair channel and a non-cascading extended channel, the one twisted pair channel and one non-cascaded extended channel capable of generating a level 1 cascaded extension channel; or, both are non-cascading extensions Channel, the two non-cascading extended channels are capable of generating a level 1 cascaded extension channel; or, both are two L-1 level cascaded extension channels, where L>1, the two L-1 levels The joint extension channel can generate one L-level cascade extension channel; or both are an L-1 level cascade extension channel and a twisted pair channel, where L>1, the one L-1 level cascade expansion channel and A twisted pair channel can generate one L-level cascaded extension channel; or both are an L-1 level cascade expansion channel and a non-cascading extension channel, where L>1, the one L-1 level cascade The extended channel and one non-cascading extended channel can generate one L-level cascaded extension channel; or both are an L-1 level cascade extension channel and an L-i level cascade extension channel, where L>1, i > l, the one L-level cascade expansion channel and one L-i cascade expansion channel can generate one L-level cascade extension channel.

Taking FIG. 5 as an example, three extended channels are generated by using four twisted pair pairs, two of which are non-cascading extended channels generated by the twisted pair channel, and one is a cascade generated by two non-cascaded extended channels. The extended channel, in which the first non-cascading extended channel NCEC1 is generated, the different channel combinations may be generated to generate NCEC1, and the different channel combinations include P1 and P4, PI and P3, PI and P2, P2 and P3, P2 and P4, P3 and P4, when generating NCECl, can measure crosstalk between two twisted pair channels in these different channel combinations, and compare the measured crosstalk values, select crosstalk from these crosstalk values. The non-minimum one channel combination generates NCEC1, and preferably, the combination with the largest crosstalk value can be selected.

Taking Figure 6 as an example, the different channel combinations for generating NCEC1 include P1 and P4, PI and P3, PI and P2, P2 and P3, P2 and P4, P3 and P4. When generating NCECl, these different channel combinations can be measured. Crosstalk between the two channels, and comparing the measured crosstalk values, selecting one of the crosstalk values to select a channel combination that is not the smallest crosstalk to generate NCEC1. Preferably, the combination with the largest crosstalk value can be selected; assuming that the combination of P1 and P4 is Selecting to generate NCEC1, the different channel combinations for generating CEC1 are NCEC1 and P2, NCECl and P3. It is possible to measure the crosstalk between two channels in the two different channel combinations, and compare the measured crosstalk values to select crosstalk. The largest one combination generates CEC1; after the channel combination for generating CEC1 is determined, there is only one channel combination for generating CEC2.

When n is the p-th power of 2, where p 2 generates n - 1 extended channels, all n twisted-pair channels are used to generate non-cascading extended channels, using all non-cascading extended channels. Health As a level 1 cascaded extension channel, each level 1 cascaded extension channel is generated by only two non-cascaded extension channels, starting with a level 1 cascaded extension channel, and if the level of the cascaded extension channel is not one, then all are used. The cascaded expansion channels of the two levels generate a higher level of cascaded extension channels, and so on, until only one of the highest level cascaded extension channels is generated, and each of the L-level cascaded extension channels consists of only two Ls. - Level 1 cascade expansion channel generation. In the process of generating n - 1 extended channels, each extended channel that can be generated by a plurality of different channel combinations can be selected by the method shown in FIG. 12 before being generated. Taking 2 to 3 powers, that is, 8 twisted pair channels as an example, 7 extended channels can be generated, 4 non-cascading extended channels, 2 1st cascaded extended channels, and 1 2nd cascaded extended channel. . When the first three non-cascading extended channels are generated, different channel combinations are available for selection. When the first level 1 cascaded extended channel is generated, different channel combinations are also available for selection.

Further, when measuring the string ·ί special value described in 1201, when the n twisted pair channels are connected to the CO but not connected to the CPE, the near-end common mode crosstalk or near-end difference of the CO end can be measured on the CO side. Mode crosstalk; when the n twisted pair channels are connected to the CO and CPE, remote common mode crosstalk, far-end differential mode crosstalk, near-end common mode crosstalk, near-end differential mode can be measured at the CO or CPE end. One of crosstalk; when the n twisted pair channels are not connected to the CO but are already connected to the CPE, one of the near-end common mode crosstalk and the near-end differential mode crosstalk can be measured at the CPE end. The reference signal can be sent through the DSL chipset and the crosstalk can be measured.

In the method shown in 1200, the n twisted pair channels may be twisted pair channels that have been determined to be connected to the CPE after determining the wiring. It may also be n twisted pair channels prior to wiring determination, the number of which may be greater than the number of twisted pair channels that need to be connected to the CPE.

Before the wiring is determined, the number of available twisted pair channels N is greater than the number of twisted pair channels n to be used by the CPE, and embodiments of the present invention provide for selecting n twisted pairs from N twisted pair channels. The method of the channel, the specific process is shown in Figure 13.

1 301: Measure a crosstalk value of a combination of different twisted pair channels composed of two of the unselected twisted pair channels in the N twisted pair channels;

1 303: Compare the crosstalk values of different twisted pair channel combinations;

1 305: Select two twisted pairs in a combination with the largest crosstalk value of the different twisted pair channel combinations Line channel

1 307: If the number of selected twisted pair channels does not reach n, or the number of selected twisted pair channels does not reach n - 1, repeat the above process until the number of selected twisted pair channels N is reached, or until the number of selected twisted pair channels reaches n - 1, and one of the unpaired twisted pair channels is randomly selected, so that the number of selected twisted pair channels reaches n.

When the line is selected, since the wiring is not yet determined, the CPE is generally not connected, and can be selected by the signal transmitted by the central office CO (Cen ra l Off i ce ) DSLAM. The crosstalk in 1 301 can be near-end common mode crosstalk or near-end differential mode crosstalk at the CO side.

An embodiment of the present invention provides an apparatus for extending a channel. As shown in FIG. 14 at 1400, n represents n twisted pair channels, and the extended channel generating unit 1401 uses n twisted pair channels to generate m by using different schemes. Extension channels, where n> 2, mn - 1, m . m ₂ represents an extended channel generated by two different schemes. The channel combinations adopted by each of the m extension channels are different, and the channel combinations used to generate each extension channel between different schemes are also different, and thus the generated m extension channels are also different.

The performance parameter obtaining unit 1403 respectively obtains parameter P values characterizing the overall performance of the m extended channels under different schemes, for example! The overall performance parameter values of m extended channels in ^ and m ₂ are Pi and P ₂ , respectively;

The selecting unit 1405 compares the P values corresponding to the respective schemes and selects a scheme corresponding to the non-minimum values, and preferably, the non-minimum value is the maximum value P _max .

Further, the performance parameter obtaining unit 1403 may include a measurement module 1407 and a calculation module 1409. After generating m expansion channels by using different schemes, when m≥l, the measurement module may separately measure m extension channels generated by the different schemes. a performance parameter value of each of the extended channels, where the performance parameter value includes one of a vertical balance, an activation rate, a reachable rate, a signal to noise ratio, and a reciprocal of the attenuation, and the calculation module calculates the generated m under the different schemes a sum of performance parameter values of each of the extended channels, the sum being the overall performance parameter value; when m>l, since the crosstalk between the extended channels can be measured, the measurement module can also separately measure the Overall crosstalk value or total crosstalk energy value between m extension channels generated under different schemes, calculation module calculation The reciprocal of the total crosstalk value or the reciprocal of the total crosstalk energy value between the m extension channels generated under different schemes, the reciprocal of the overall crosstalk value or the reciprocal of the overall crosstalk energy value as an overall performance parameter.

Further, the extended channel generating unit 1401 may include a conversion module and a control module as shown in FIG. 8, and the conversion module acquires a common mode signal of each twisted pair channel in the n twisted pair channels, for a total of n twisted pairs The analog signal is digitally processed to generate m extended channels; the control module controls the conversion module to digitally process the common mode signals to obtain different channel expansion schemes respectively. The control module can be implemented with a DSL chipset. The extended channel generating unit may further include a transceiver for receiving channel extension information, and digitally processing the common mode signal by using the channel extension information to generate an extended channel in a different channel extension scheme, where the channel extension information includes The number of twisted pair pairs used by the user, whether or not to use the cascaded extended channel generation method.

The device shown in 1400 can be implemented in CO or in CPE. If implemented in the CO, the conversion module can be included in the CO, and the conversion module performs digital processing to generate various extension channels. The conversion module can generate a scheme of at least two extension channels. The CO may send a message to the CPE, and notify the opposite party to switch to the corresponding extended channel generation scheme to perform measurement; or may not notify the CPE, and the CO single-end performs the extended channel scheme switching to obtain different extended channel generation schemes and selects. After C0 completes the extended channel selection, the CPE is notified of the manner in which the extended channel is generated, and the CO and the CPE perform channel extension according to the extended channel generation scheme determined by the CO, and initialize the extended channel.

If implemented in the CPE, the CPE includes a conversion module, and the conversion module performs digital processing to generate various extension channels. The conversion module has at least two schemes for generating an extended channel. The CPE may send a message to the C0 to notify the other party to switch to the corresponding extended channel generation scheme and then perform the measurement; the CPE may not notify the C0, the CPE single-end performs the extended channel scheme switching and single-ended measurement; or the CPE may be under the control of C0. The channel scheme is switched, C0 and CPE are switched to the same channel extension mode, and then the scheme is measured and determined by the CPE. After the CPE completes the extended channel selection, it notifies C0 that the extension channel is generated, and the CO and CPE perform channel extension according to the extended channel generation scheme determined by the CPE, and initialize the extended channel.

In addition, the extended channel generating unit can also be implemented in a manner similar to that shown in FIG. The channel generation unit includes a control module and a set of electronic switches. The control module controls a group of electronic switches to respectively generate m extension channels by using different combinations of switch states, and different switch state combinations correspond to different schemes.

An embodiment of the present invention provides a device for extending a channel. As shown in FIG. 15 1500, N represents N twisted pair channels, and the twisted pair channel selecting unit 1501 randomly selects from N twisted pair channels. n different twisted pair channels of different combinations, where n > 2, N > n, ^ and represent two different combinations;

The intermediate scheme selection unit 1503 is configured to use n twisted pair channels of a selected combination, for example! ^ or, respectively, generate m extension channels by using different schemes, where mn - 1, each scheme generates m extension channels, and the channel combinations used for generating each of the m extension channels in the same scheme are different. The channel combinations used to generate each extended channel between different schemes are different; respectively, the overall performance parameter P values representing the m extension channels under different schemes are respectively obtained, and the P values corresponding to the respective schemes are compared and a non-minimum is selected therefrom. For the scheme corresponding to the value, preferably, the scheme corresponding to the maximum value may be selected. For example, in FIG. 15, the scheme corresponding to the maximum value is selected, and the combination corresponds to P _maxl , and n ₂ corresponds to P _max2 .

The final scheme selecting unit 1505 compares the non-minimum values corresponding to the different twisted pair channels of the different combinations, and selects a non-minimum corresponding scheme from among the non-minimum values according to the comparison result. Preferably, the maximum value may be selected. For example, in Fig. 15, the maximum value P _{max is} selected again from the maximum values including P _maxl and P _max2 .

As shown in FIG. 16, an embodiment of the present invention provides an extended channel device 1600, which includes:

The measuring unit 1601 is configured to perform channel expansion process using n twisted pair channels, where n > 2, when two channels are used to generate one extended channel, respectively, two of the different channel combinations that constitute the channel combination are respectively measured Crosstalk value between channels;

The selecting unit 1603 is configured to compare the crosstalk value, and select two channels in the channel combination corresponding to one non-minimum value of the crosstalk value to generate an extended channel. Preferably, the channel combination corresponding to the maximum value is selected. It can be seen from the above description that an embodiment of the present invention can intelligently select and select a better extended channel scheme, so that the extended channel has better performance, so that the SuperMIMO system has better performance.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary hardware platform, and of course, can also be implemented entirely by hardware. Based on such understanding, all or part of the technical solution of the present invention contributing to the background art may be embodied in the form of a software product, which may be stored in a storage medium such as a ROM/RAM, a magnetic disk, an optical disk, or the like. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Claim

A method for generating an extended channel, comprising:

Using n twisted pair channels, respectively, different schemes are used to generate different m extension channels, each of the different schemes generates m extension channels, where n > 2, mn _ l, where the extended channel Divided into non-cascading extended channel and cascaded extended channel, each non-cascading extended channel is generated by two twisted pair channels, each level 1 cascaded extended channel is generated by two non-cascaded extended channels, or by A non-cascading extended channel and a twisted pair channel are generated, each L-level cascaded extended channel, where L>1, generated by two L-1 level cascaded extension channels, or, by an L-1 level a joint extension channel and a non-cascading extension channel are generated, or are generated by an L-1 level cascade extension channel and a twisted pair channel, or, by an L-1 level cascade extension channel and an L-i level Cascaded extended channel generation, where i > l ;

Obtaining overall performance parameter values of the m extended channels generated by the different schemes respectively; comparing the total performance parameter values of the m extended channels generated by the different schemes, and selecting one of the non-minimum P corresponding schemes.

The method according to claim 1, wherein the obtaining the total performance parameter values of the m extended channels generated by the different solutions respectively includes:

Separating the performance parameter values of each of the m extension channels generated by the different schemes, calculating a sum of performance parameters of each of the extension channels, and using the sum as the overall performance parameter value, where The performance parameter values include one of a longitudinal balance, an activation rate, a reachable rate, a signal to noise ratio, and a reciprocal of the attenuation, where m≥l; or

Measuring, respectively, an overall crosstalk value or an overall crosstalk energy value between the m extension channels generated by the different schemes, where a reciprocal of the total crosstalk value or a reciprocal of the total crosstalk energy value is used as the overall performance parameter value, where m> l.

The method according to claim 1 or 2, wherein the different schemes are used to generate different m extension channels, including:

Obtaining a common mode signal of each of the twisted pair channels of the n twisted pair channels, and controlling a manner of performing digital processing on the common mode signals to respectively obtain the different solutions, where the different solutions are respectively The common mode signal is digitally processed to generate m extended channels.

4. The method of claim 3, further comprising:

Receiving channel extension information, and performing digital processing on the common mode signal by using the information in the different schemes respectively to generate m extended channels, where the information includes the number of twisted pair pairs used by the user, whether to generate a cascade Extended channel.

The method according to claim 1 or 2, wherein the generating different m extension channels by using different schemes respectively comprises: different switch state combinations corresponding to the different schemes, according to each A switch state combination controls the state of each of the set of electronic switches to generate m extended channels.

The method according to any one of claims 1 to 5, characterized in that, in the channel initializing process of the super multiple input multiple output digital subscriber line, the extended channel generated under the scheme corresponding to the non-minimum value P Initialize.

The method according to any one of claims 1 to 6, wherein the n twisted pair channels are randomly selected from the twisted pair channels;

Further includes:

Selecting M sets of twisted pair channels randomly from the N twisted pair channels, where M > 1, each set includes n twisted pair channels, and n twisted pair channels of each group are associated with the n The twisted pair channel is different, and the corresponding non-minimum corresponding scheme is selected for the n twisted pair channels in each group, and the non-minimum corresponding to the kth group is P _k , k = 1 , 2. . . .

Compare the P and P ₂ . . . P _M and select one of the non-minimum corresponding schemes.

A method for generating an extended channel, comprising:

In the process of channel extension using n twisted pair channels, where n > 2, when two channels are used to generate one extended channel, the crosstalk values between the two channels constituting the channel combination in different channel combinations are respectively measured. ;

Comparing the crosstalk values, and selecting two of the channel combinations corresponding to one of the crosstalk values to generate an extended channel.

9. The method of claim 8 wherein:

The n twisted pair channels are connected to the central office CO but are not connected to the user terminal equipment CPE, and the crosstalk includes one of a near-end common mode crosstalk and a near-end differential mode crosstalk of the CO end; or

The n twisted pair channels are connected to the CO and the CPE, and the crosstalk includes one of a remote common mode crosstalk, a far-end differential mode crosstalk, a near-end common mode crosstalk, and a near-end differential mode crosstalk at the CO end or the CPE end. Alternatively, the n twisted pair channels are not connected to the CO but are already connected to the CPE, and the crosstalk includes one of near-end common mode crosstalk and near-end differential mode crosstalk at the CPE end.

10. The method according to claim 8 or 9, wherein the different channel combinations form two channels of the channel combination,

Both are two twisted pair channels, and the two twisted pair channels can generate one non-cascading extended channel; or

A twisted pair channel and a non-cascading extended channel, the one twisted pair channel and one non-cascaded extended channel capable of generating a level 1 cascaded extension channel; or

All of the two non-cascading extended channels; the two non-cascading extended channels are capable of generating a level 1 cascaded extended channel; or

Both are two L - 1 cascaded extension channels; the two L - 1 cascaded extension channels are capable of generating one L-level cascaded extension channel, where L>1; or

Both are an L-1 level cascade expansion channel and a twisted pair channel; the one L-1 level cascade extension channel and one twisted pair channel can generate an L level cascade expansion channel, where L>1; Or, both are an L-1 level cascading extension channel and a non-cascading extension channel; the one L_1 level cascading extension channel and one non-cascading extension channel are capable of generating an L-level cascading extension channel, wherein L>1; or,

Both are an L-1 level cascading extension channel and an L-i level cascading extension channel; the one L-1 level cascading extension channel and one L-i level cascading extension channel are capable of generating an L-level cascade Extended channel, where L>1, i >l.

An extended channel device, comprising:

An extended channel generating unit for using n twisted pair channels, respectively, using different schemes to generate no The same m extension channels, each of the different schemes generates m extension channels, where n > 2 , m ^ n - 1 , and the extension channel is divided into a non-cascading extension channel and a cascade extension channel, Each non-cascading extension channel is generated by two twisted pair channels, each level 1 cascaded extension channel is generated by two non-cascaded extension channels, or generated by a non-cascaded extension channel and a twisted pair channel , each L-level concatenated extension channel, where L>1, generated by two L-1 level concatenated extension channels, or generated by one L-1 level concatenated extension channel and one non-cascaded extension channel, or , generated by an L-1 level cascade extension channel and a twisted pair channel, or generated by an L-1 level cascade extension channel and an L-i level cascade extension channel, where i >l;

And a selecting unit, configured to compare an overall performance parameter value of the m extended channels generated by the different schemes, and select one of the non-minimum P corresponding solutions.

The device according to claim 11, wherein the performance parameter obtaining unit comprises: a measuring module, configured to separately measure performance parameter values of each of the m extended channels generated by the different schemes The performance parameter value includes one of a longitudinal balance, an activation rate, a reachable rate, a signal-to-noise ratio, and a reciprocal of the attenuation, where m≥l; or, for separately measuring m generated under the different schemes An overall crosstalk value or an overall crosstalk energy value between the extended channels, where m>l;

a calculation module, configured to calculate a sum of performance parameter values of each of the m extension channels generated under the different schemes obtained by the measurement, where the sum is the total performance parameter value, where m≥l; or Calculating a reciprocal of the total crosstalk value or a reciprocal of the total crosstalk energy value between the m extension channels generated under the different schemes obtained by the measurement, the reciprocal of the total crosstalk value or the reciprocal of the total crosstalk energy value as an overall performance Parameters, where m>l.

The apparatus according to claim 11 or 12, wherein the extended channel generating unit comprises:

a conversion module, configured to acquire a common mode signal of each of the n twisted pair channels, and perform digital processing on the common mode signal to generate m extended channels respectively under the different schemes; a module, configured to control a manner of digitally processing the common mode signal in the conversion module To obtain the different schemes separately.

The apparatus according to claim 13, wherein the extended channel generating unit further comprises:

a receiving module, configured to receive channel extension information, and perform digital processing on the common mode signal by using the channel extension information to generate m extended channels, where the channel extension information includes a twisted pair used by a user The number of pairs of lines, whether or not to generate a cascaded extension channel.

The device according to claim 11 or 12, wherein the extended channel generating unit comprises:

a control module and a set of electronic switches, wherein the control module controls the set of electronic switches to generate the different solutions by using different switch states, and the different switch state combinations correspond to the different solutions one by one, according to each A combination of switch states controls the state of each of the set of electronic switches to generate m extended channels.

16. An apparatus for extending a channel, comprising:

a twisted pair channel selection unit, configured to randomly select n different twisted pair channels from different N twisted pair channels, where n > 2, N > n;

The intermediate scheme selecting unit is configured to generate different m extended channels by using different schemes by using n twisted pair channels, where each of the different schemes generates m extended channels, where n > 2, m ^ n - 1 , m extension channels include at least one extension channel, wherein the extension channel is divided into a non-cascading extension channel and a cascade extension channel, and each non-cascade extension channel is generated by two twisted pair channels, each The level 1 cascaded extension channel is generated by two non-cascading extension channels, or is generated by one non-cascading extension channel and one twisted pair channel, each L level concatenated the extension channel, where L>1, by two L-1 level cascaded channel generation, or generated by an L-1 level cascaded extension channel and a non-cascaded extension channel, or generated by an L-1 level cascaded extension channel and a twisted pair channel Or, generated by an L - 1 cascaded extension channel and an L - i cascaded extended channel, where i >1; respectively, obtaining overall performance parameter values of m extended channels generated under the different schemes; The different parties Overall performance parameter values generated by the m extended channel, and select a program corresponding to the non-minimum value P therein; final scheme selection unit for comparing the different combinations of the n channels corresponding to the non-UTP most Small value P and choose one of the non-minimum solutions.

17. An extended channel device, comprising:

a measuring unit, configured to perform channel expansion using n twisted pair channels, where n > ² , when using two channels to generate one extended channel, respectively measuring two channels constituting the channel combination in different channel combinations Crosstalk value between;

And a selecting unit, configured to compare the crosstalk value, and select two channels in the channel combination corresponding to one of the crosstalk values to generate an extended channel.