WO2014146282A1

WO2014146282A1 - Channel processing method, device, and system

Info

Publication number: WO2014146282A1
Application number: PCT/CN2013/073007
Authority: WO
Inventors: 李莹; 涂建平
Original assignee: 华为技术有限公司
Priority date: 2013-03-21
Filing date: 2013-03-21
Publication date: 2014-09-25
Also published as: CN103518343A; CN103518343B

Abstract

Disclosed are a channel processing method, device, and system, and the present invention is applied to a vectorized crosstalk cancellation VECTOR system. A receive end of a line estimates, according to a measured line parameter of the line, a maximum sub-channel set of bits that can be borne by the line; obtains a current bit loading table of the line, and determines, according to the current bit loading table, a maximum sub-channel set of bits that are currently borne by the line; according to the estimated maximum sub-channel set, changes state information of a sub-channel between the maximum sub-channel set in the current bit loading table and the estimated maximum sub-channel set from off-state information to on-state information; and sends the modified current bit loading table to a transmit end of the line, so that the transmit end sends data according to the maximum sub-channel set of bits that are currently borne by the line in the modified current bit loading table, thereby improving the total number of bits that can be borne by each line.

Description

The present invention relates to the field of communications technologies, and in particular, to a channel processing method, apparatus, and system. Background technique

Currently, in the vectorized crosstalk cancellation (VECTOR) G993.5 system, an initial signal-to-noise ratio (SNR) is estimated for each line during the channel discovery phase, and then based on the initial SNR. To determine the maximum subchannel set (MAXIMUM SUPPORT TONE) of the line that can carry bits, but because the crosstalk cancellation is not performed on the line during the channel discovery phase, the SNR of some high frequency subchannels is relatively low. Cannot carry bits.

However, after the channel discovery phase, after the crosstalk cancellation of the crosstalk coefficient of the other line according to the calculated other lines, those high frequency subchannels that are turned off during the channel discovery phase can achieve a higher SNR and can carry bits. Therefore, the above-mentioned high frequency subchannel that is turned off during the channel discovery phase cannot be used at the transmission data time (SHOWTIME), which reduces the data transmission efficiency of the VECTOR system. Summary of the invention

The invention provides a channel processing method, device and system, which are applied to a VECTOR G993.5 system, which can improve the data transmission efficiency of the VECTOR system.

In a first aspect, the present invention provides a channel processing method for applying a vectorized crosstalk cancellation VECTOR system, including:

The receiving end of the line estimates the maximum subchannel set of the line that can carry the bit according to the measured line parameter of the line;

Obtaining a current bit loading table of the line, and determining, according to the current bit loading table, a maximum subchannel set of current bearer bits of the line;

Modifying the current bit loading table according to the estimated maximum number of subchannels, State information of a subchannel other than the largest subchannel set of the current bearer bit of the line and belonging to the estimated maximum subchannel set is set from the off state information to the on state information; loading the modified current bit The table is sent to the sending end of the line, so that the sending end sends data according to the largest subchannel set of the current bearer bit of the line included in the modified current bit loading table.

Based on the first aspect, in a first possible implementation, the receiving end of the line estimates, according to the measured line parameter of the line, a maximum subchannel set in which the line can carry bits, including:

An electrical length k10 parameter of the line measured by a receiving end of the line, estimating a channel attenuation H(i) of the line; according to the estimated channel attenuation H(i) and a power sent by a transmitting end of the line Spectral Density PSD, which estimates the largest set of subchannels that the line can carry without crosstalk and only background noise.

Based on the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the acquiring a current bit loading table of the line, determining the line according to the current bit loading table The largest set of subchannels currently carried, including:

In the channel analysis and interaction phase, the receiving end of the line receives a current bit loading table of the line sent by the transmitting end of the line, where the current bit loading table includes status information of each subchannel of the line. The status information includes open status information and/or closed status information;

Determining, according to the open state information of each subchannel of the line included in the current bit loading table, a maximum subchannel set in which the line can currently carry bits.

Based on the first aspect or the first or second possible implementation manner of the first aspect, in a third possible implementation, the modifying the current bit loading table according to the estimated maximum subchannel set, And setting the state information of the subchannels that are outside the set of the largest subchannels of the current bearer bit of the line to the open state information from the off state information, including:

And setting, according to the estimated maximum subchannel set, a subchannel other than the largest subchannel set in the current bit loading table and having state information 0 within the estimated maximum subchannel set as state information It is a subchannel such that a high frequency subchannel that is turned off during the channel discovery phase can carry bits. In a second aspect, the present invention provides a channel processing method for vectorized crosstalk cancellation

VECTOR system, including:

The transmitting end of the line sends a current bit loading table of the line to the receiving end of the line, so that the receiving end determines a maximum subchannel set of the current bearer bit of the line according to the current bit loading table; a maximum subchannel set, modifying the current bit loading table, that is, the state information of the subchannels other than the largest subchannel set of the current bearer bit of the line and belonging to the estimated maximum subchannel set from the off state information Set to enable state information; and send the modified current bit loading table to the transmitting end of the line, the estimated maximum subchannel set is a line parameter of the line according to the measured receiving end of the line Estimating a maximum set of subchannels over which the line can carry bits;

The transmitting end of the line transmits data according to the largest subchannel set of the current bearer bit of the line included in the modified current bit loading table.

In a third aspect, the present invention provides a channel processing apparatus, which is located at a receiving end of a line, and is applied to a vectorized crosstalk cancellation VECTOR system, including:

An estimating module, configured to estimate, according to the measured line parameters of the line, a maximum subchannel set in which the line can carry bits;

a determining module, configured to acquire a current bit loading table of the line, and determine, according to the current bit loading table, a maximum subchannel set of current bearer bits of the line;

a modifying module, configured to modify, according to the maximum subchannel set estimated by the estimating module, the current bit loading table, that is, outside the largest subchannel set of the current bearer bit of the line determined by the determining module, and belonging to the The status information of the subchannel within the estimated maximum subchannel set is set from the off state information to the on state information;

a sending module, configured to send the modified current bit loading table of the modifying module to the sending end of the line, so that the sending end loads the current bearer of the line included in the table according to the modified current bit loading table The largest subchannel set of bits transmits data.

Based on the third aspect, in a first possible implementation, the estimating module is specifically configured to: measure an electrical length k10 parameter of the line, and estimate a channel attenuation H(i) of the line; The channel attenuation H(i) and the power spectral density PSD transmitted by the transmitting end of the line estimate the maximum number of subchannels that the line can carry without crosstalk and only background noise. Based on the third aspect or the first possible implementation manner of the third aspect, in the second possible implementation manner, the determining module is specifically configured to:

Receiving, in a channel analysis and interaction phase, a current bit loading table of the line sent by a sending end of the line, where the current bit loading table includes status information of each subchannel of the line, where the status information includes Turn on status information and/or turn off status information;

And determining, according to the open state information of each subchannel of the line included in the current bit loading table, a maximum subchannel set of the current bearer bit of the line.

Based on the third aspect or the first or second possible implementation manner of the third aspect, in a third possible implementation, the modifying module is specifically configured to: according to the estimated maximum subchannel set, a subchannel other than the largest subchannel set in the current bit loading table and having state information 0 within the estimated maximum subchannel set is set to state information as 1 subchannel, so that it is turned off during the channel discovery phase. The high frequency subchannel can carry bits.

In a fourth aspect, the present invention provides a channel processing apparatus, which is located at a transmitting end of a line, and is applied to a vectorized crosstalk cancellation VECTOR system, including:

a sending module, configured to send a current bit loading table of the line to a receiving end of the line, so that the receiving end determines a maximum subchannel set of a current bearer bit of the line according to the current bit loading table; a maximum subchannel set, the state information of the subchannels other than the largest subchannel set of the current bearer bit of the line and belonging to the estimated maximum subchannel set is set from the off state information to the on state information; Transmitting the modified current bit loading table to the transmitting end of the line, where the estimated maximum subchannel set is that the receiving end of the line estimates that the line can be carried according to the measured line parameter of the line. The largest subchannel set of bits;

And a transmission module, configured to transmit data according to a maximum subchannel set of the current bearer bit of the line included in the modified current bit loading table.

In a fifth aspect, the present invention provides a channel processing apparatus, which is located at a receiving end of a line, and is applied to a vectorized crosstalk cancellation VECTOR system, including: a processor, a memory, and a communication bus, wherein the processor communicates with the a memory connection, wherein the memory stores an instruction to implement the channel processing method;

When the processor retrieves the instruction saved in the memory, the following steps may be performed: estimating, according to the measured line parameter of the line, the maximum bit length that the line can carry Subchannel set

Modifying, according to the estimated maximum subchannel set, the current bit loading table, that is, a state of a subchannel that is outside the largest subchannel set of the current bearer bit of the line and belongs to the estimated maximum subchannel set The information is set from the closed state information to the open state information; the modified current bit loading table is sent to the sending end of the line, so that the sending end loads the table included in the table according to the modified current bit The maximum subchannel set of the current bearer bit of the line transmits data.

Based on the fifth aspect, in a first possible implementation manner, the estimating, according to the measured line parameter of the line, the maximum subchannel set that the line can carry a bit, including: measuring the electrical length of the line a klO parameter, estimating a channel attenuation H(i) of the line; estimating the line without crosstalk and having only a background based on the estimated channel attenuation H(i) and a power spectral density PSD transmitted by a transmitting end of the line The largest set of subchannels that can be carried in the case of noise.

Based on the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner, the acquiring a current bit loading table of the line, determining the line according to the current bit loading table The largest set of subchannels currently carrying bits, including:

Based on the fifth aspect or the first or second possible implementation manner of the fifth aspect, in a third possible implementation, the modifying the current bit loading table according to the estimated maximum subchannel set, And setting the state information of the subchannels that are outside the set of the largest subchannels of the current bearer bit of the line to the open state information from the off state information, including:

And according to the estimated maximum subchannel set, the state information outside the largest subchannel set in the current bit loading table and belonging to the estimated maximum subchannel set is 0. The subchannel is set to state information as 1 subchannel such that the high frequency subchannel that is turned off during the channel discovery phase can carry bits.

According to a sixth aspect, the present invention provides a channel processing apparatus, which is located at a transmitting end of a line, and is applied to a vectorized crosstalk cancellation VECTOR system, including: a processor, a memory, and a communication bus, wherein the processor communicates with the a memory connection, wherein the memory stores an instruction to implement the channel processing method;

When the processor retrieves the instruction stored in the memory, the following steps may be performed: sending a current bit loading table of the line to a receiving end of the line, so that the receiving end loads the table according to the current bit Determining a maximum subchannel set of the current bearer bit of the line; modifying the current bit loading table according to the estimated maximum subchannel set, that is, outside the largest subchannel set of the current bearer bit of the line, and belonging to the estimation The status information of the subchannels within the largest subchannel set is set from the off state information to the on state information; and the modified current bit loading table is sent to the transmitting end of the line, the estimated maximum subchannel set And determining, by the receiving end of the line, a set of maximum subchannels that the line can carry bits according to the measured line parameters of the line;

And transmitting data according to a maximum subchannel set of the current bearer bit of the line included in the modified current bit loading table.

In a seventh aspect, the present invention provides a channel processing system for a vectorized crosstalk cancellation VECTOR system, the system comprising: the channel processing device at the line receiving end and the channel processing device at the line transmitting end.

The present invention measures a line parameter by a receiving end of each line, estimates a maximum subchannel set in which the line can carry bits, and determines a maximum subchannel set of the current bearer bit of the line according to the obtained current bit loading table; further, Modifying, according to the estimated maximum subchannel set, the current bit loading table, that is, a state of a subchannel that is outside the largest subchannel set of the current bearer bit of the line and belongs to the estimated maximum subchannel set The information is set from the off state information to the on state information according to the estimated maximum subchannel set, and the modified current bit loading table is sent to the sending end of the line, so that the sending end of the line is modified according to the The current bit loading table does not turn off the high frequency subchannels with low signal to noise ratio during the channel discovery phase, because after the vectorized crosstalk cancellation, these high frequency subchannels with low signal to noise ratio during the channel discovery phase Can have a higher signal to noise ratio and can be used to carry bits, Therefore, the present invention can improve the data transfer efficiency of each line in the VECTOR system. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

1 is a schematic flowchart of a channel processing method according to an embodiment of the present invention;

2 is a schematic flowchart of a channel processing method according to another embodiment of the present invention; FIG. 3 is a schematic structural diagram of a channel processing apparatus according to another embodiment of the present invention; FIG. 4 is a channel processing apparatus according to another embodiment of the present invention; FIG. 5 is a schematic structural diagram of a channel processing apparatus according to another embodiment of the present invention; FIG. 6 is a schematic structural diagram of a channel processing apparatus according to another embodiment of the present invention; Schematic diagram of the channel processing system. 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. The embodiments are a part of the embodiments of the 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.

The technical solution of the present invention can be applied to a vectorized crosstalk cancellation (VECTOR) system. FIG. 1 is a schematic flowchart of a channel processing method according to an embodiment of the present invention. As shown in FIG. 1, the channel processing method in this embodiment may include:

101. The receiving end of the line estimates a maximum subchannel set in which the line can carry bits according to the measured line parameters of the line.

In the existing VECTOR G993.5 system, in the channel discovery phase, an initial signal-to-noise ratio (SNR) is estimated for each line, and then the line is determined according to the initial SNR. The largest set of subchannels that can carry bits (MAXIMUM SUPPORT TONE). However, since the crosstalk cancellation is not performed on the line during the channel discovery phase, the SNR of some high frequency subchannels in the line is relatively low, so that the high frequency subchannel in which the SNR is smaller than the initial SNR. It is determined that the subchannel is not capable of carrying bits, and only the high frequency subchannel whose SNR is greater than the initial SNR in the line is determined as a subchannel that can carry bits.

However, after the channel discovery phase, according to the calculated crosstalk coefficient of the other line, after the crosstalk cancellation of the line, the high frequency subchannels that are limited due to the low SNR during the channel discovery phase are higher. The SNR is capable of carrying bits; therefore, the high frequency subchannels that are limited due to the low SNR during the channel discovery phase are not used for the transmission data time (SHOWTIME), which reduces the data transmission rate of the line.

In order to improve the data transmission rate of each line, in the embodiment of the present invention, the maximum subchannel set in which each line can carry bits is not determined according to the initial SNR of the channel discovery phase, but is measured according to the receiving end of the line. The line parameters of the line estimate the maximum number of subchannels that the line can carry.

Wherein, if the line is used for downlink transmission, the line receiving end refers to the device located at the far end. If the line is used for uplink transmission, the line receiver refers to the equipment at the Central Office (CO).

For the line parameters measured according to the receiving end of the line, the maximum subchannel set that the line can carry is estimated, in specific implementation:

For example, after the central office and the remote handshake interaction, the channel attenuation H(i) of the line may be estimated according to the electrical length k10 parameter of the line measured by the receiving end of the line; according to the estimated channel attenuation H(i) and a power spectral density (PSD) transmitted by the transmitting end, estimating a maximum subchannel set that the line can carry without crosstalk and only background noise;

As for the power spectral density, it should be noted that, in the handshake phase between the central office and the remote end, the two parties negotiate the capability sets supported by the two parties. After determining the capability set, the power is transmitted according to the profile supported by the capability. If the downlink transmission is performed, the device at the central office transmits the power spectral density, and if it is the uplink transmission, the remote device transmits the power spectral density.

For another example, the maximum subchannel set that can be carried by the line can be estimated according to hardware resources of the line, for example, comparing the size of the storage resource or the single-word long-point instruction consumed by the operation. The Million Instructions Per Second (MIPs) number, which is the maximum number of subchannels that can be carried by the line.

102. The receiving end acquires a current bit loading table of the line, and determines a maximum subchannel set of the current bearer bit of the line according to the current bit loading table.

When the step 102 is specifically implemented, in the channel analysis and interaction phase, the transmitting end of the line may send the current bit loading table gi of the line to the receiving end by using an update (0-UPDATE) message; wherein, the current bit loading table The gi includes status information of each subchannel of the line, and the status information includes open status information (for example, 1 indicates open status information) and/or closed status information (for example, 0 indicates closed status information);

After receiving the current bit loading table of the line sent by the sending end of the line, the receiving end of the line may determine, according to the opening state information of each subchannel of the line included in the current bit loading table gi The line can currently carry the largest set of subchannels of bits.

103. The receiving end modifies the current bit loading table according to the estimated maximum subchannel set, that is, outside the largest subchannel set of the current bearer bit of the line, and belongs to the estimated maximum subchannel set. The status information of the subchannel within is set from the off state information to the on state information.

When the step 103 is specifically implemented, the state information outside the largest subchannel set in the current bit loading table gi and belonging to the estimated maximum subchannel set may be 0 according to the maximum subchannel set estimated in step 101. The subchannel is set to a subchannel whose status information is 1, so that the high frequency subchannel that is turned off due to the relatively low SNR during the channel discovery phase can also carry bits.

104. The receiving end sends the modified current bit loading table to a sending end of the line.

Correspondingly, the transmitting end of the line transmits data or bearer bits according to the largest subchannel set of the current bearer bit of the line included in the modified current bit loading table, that is, the sending end loads according to the modified current bit. The table does not turn off the high-frequency subchannel with low signal-to-noise ratio in the channel discovery phase, but through the feedback error sample point (ERROR SAMPLE, ES), the tracking coefficient can be trained in the SHOWTIME phase, and the training is utilized. The other line's crosstalk coefficient for the line crosstalks the line, making these The high frequency subchannel with low signal to noise ratio in the channel discovery phase has a high signal to noise ratio and can be used to carry bits.

It should be noted that, if it is a downlink transmission, the error sample point ES of the feedback is fed back by the remote device to the device at the central office; if it is the uplink transmission, the device at the central office can directly obtain the error sample point ES.

The total number of bits for each line can carry a ^ ^£ ,, linear velocity LineRate = the number of bits L xf _s (symbol rate), and each subchannel can carry a _{^{= log 2 (l + SNR)}} , each line can be seen The total number of bits L that can be carried is received by each sub

SNRGAP

The limitation of the SNR of the channel is also limited by the maximum number of subchannels of the line. In the embodiment of the present invention, the high frequency subchannel with low signal to noise ratio is not turned off during the channel discovery phase of each line, because the vector is completed. After the crosstalk cancellation, these high-frequency subchannels with low signal-to-noise ratio in the channel discovery phase can have a higher signal-to-noise ratio and can be used to carry bits, so

Data transfer efficiency of the VECTOR system. Further, in this embodiment, the rate can be adjusted by the seamless rate adaptation technology (English: Seamless Rate Adaptation, SRA for short), and the activation time of the vector line is accelerated to optimize the performance of the VECTOR without additionally increasing the uplink VECTOR coefficient. Training time.

In the embodiment of the present invention, the line parameters are measured by the receiving end of each line, the maximum subchannel set in which the line can carry bits is estimated, and the maximum subchannel set of the current bearer bit of the line is determined according to the obtained current bit loading table; Modifying, according to the estimated maximum subchannel set, the current bit loading table, that is, a subchannel outside the largest subchannel set of the current bearer bit of the line and belonging to the estimated maximum subchannel set The status information is set from the off state information to the on state information according to the estimated maximum subchannel set, and the modified current bit loading table is sent to the sending end of the line, so that the sending end of the line According to the modified current bit loading table, the high-frequency subchannels with low signal-to-noise ratio in the channel discovery phase are not turned off, because after the vectorized crosstalk cancellation is completed, these high-frequency signals with low signal-to-noise in the channel discovery phase are not The subchannel can have a higher signal to noise ratio and can be used to carry bits. Therefore, the present invention can VECTOR improve data transmission efficiency in the system for each line Rate.

2 is a schematic flowchart of a channel processing method according to another embodiment of the present invention. As shown in FIG. 2, the channel processing method in this embodiment may include:

The transmitting end of the line sends the current bit loading table of the line to the receiving end of the line, so that the receiving end determines the maximum subchannel set of the current bearer bit of the line according to the current bit loading table, according to Estimating the maximum number of subchannels, modifying the current bit loading table, that is, the state information of the subchannels other than the largest subchannel set of the current bearer bit of the line and belonging to the estimated maximum subchannel set is off The status information is set to the on state information, and the modified current bit loading table is sent to the sending end of the line, and the estimated maximum subchannel set is the line of the line according to the measured receiving end of the line. A parameter that estimates the maximum number of subchannels that the line can carry.

For a specific implementation of step 201, reference may be made to the related description in the embodiment shown in FIG. 1.

202. The transmitting end of the line transmits data according to a maximum subchannel set of the current bearer bit of the line included in the modified current bit loading table.

That is to say, according to the modified current bit loading table, the transmitting end does not turn off the high frequency subchannel with low signal to noise ratio in the channel discovery phase, but passes the feedback error sample point (ERROR SAMPLE, ES) in the SHOWTIME phase. The training of the cancellation coefficient can be performed, and the crosstalk coefficient of the line is used to crosstalk the line with the other lines of the training, so that the high frequency subchannels with low signal to noise ratio in the channel discovery phase are higher. The signal-to-noise ratio can be used for 7-bit bits.

According to the total number of bits that each line can carry ^ ^^^ ^£ , the line rate LineRate = L f _s (for the symbol rate) and the number of bits that each subchannel can carry = log 2 (l ₊ ^SNR ), we know that The total number of bits L that each line can carry is subject to each sub

SNRGAP

The limitation of the SNR of the channel is also limited by the maximum number of subchannels of the line. In the embodiment of the present invention, the high frequency subchannel with low signal to noise ratio is not turned off during the channel discovery phase of each line. Since the high-frequency subchannels with low signal-to-noise ratio in the channel discovery phase can have a higher signal-to-noise ratio after carrier-synchronized crosstalk cancellation, they can be used to carry bits, so

In the embodiment of the present invention, the line parameters are measured by the receiving end of each line, the maximum subchannel set in which the line can carry bits is estimated, and the maximum subchannel set of the current bearer bit of the line is determined according to the obtained current bit loading table; Modifying, according to the estimated maximum subchannel set, the current bit loading table, that is, a subchannel outside the largest subchannel set of the current bearer bit of the line and belonging to the estimated maximum subchannel set The status information is set from the off state information to the on state information according to the estimated maximum subchannel set, and the modified current bit loading table is sent to the sending end of the line, so that the sending end of the line According to the modified current bit loading table, the high-frequency subchannels with low signal-to-noise ratio in the channel discovery phase are not turned off, because after the vectorized crosstalk cancellation is completed, these high-frequency signals with low signal-to-noise in the channel discovery phase are not The subchannel can have a higher signal to noise ratio and can be used to carry bits, therefore, this The invention can improve the data transfer efficiency of each line in the VECTOR system.

3 is a schematic structural diagram of a channel processing apparatus according to another embodiment of the present invention; the receiving end of the line is applied to a vectorized crosstalk cancellation VECTOR system, as shown in FIG. 3, including: an estimating module 31, configured to perform measurement according to a line parameter of the line, estimating a maximum subchannel set in which the line can carry bits;

a determining module 32, configured to acquire a current bit loading table of the line, and determine, according to the current bit loading table, a maximum subchannel set of current bearer bits of the line;

The modifying module 33 is configured to: according to the maximum subchannel set estimated by the estimating module, the maximum subchannel set of the current bearer bit of the line determined by the determining module, and belonging to the estimated maximum subchannel set The status information of the subchannel within is set from the off state information to the on state information; The sending module 34 is configured to send the modified current bit loading table of the modifying module to the sending end of the line, so that the sending end loads the current line included in the table according to the modified current bit loading table. The largest subchannel set carrying bits transmits data.

For example, the estimating module 31 is specifically configured to:

Measuring the electrical length k10 parameter of the line, estimating channel attenuation H(i) of the line; estimating the channel based on the estimated channel attenuation H(i) and the power spectral density PSD transmitted by the transmitting end of the line The maximum number of subchannels that the line can carry without crosstalk and only background noise.

For example, the determining module 32 is specifically configured to:

For example, the modifying module 33 is specifically configured to load the current bit into the maximum subchannel set in the table gi according to the estimated maximum subchannel set, and belong to the estimated maximum subchannel set. The subchannel whose status information is 0 is set to a subchannel whose status information is 1, so that the high frequency subchannel that is turned off due to the relatively low SNR during the channel discovery phase can also carry bits.

4 is a schematic structural diagram of a channel processing apparatus according to another embodiment of the present invention. The receiving end of the line is applied to a vectorized crosstalk cancellation VECTOR system, and includes: a processor 41, a memory 42 and a communication bus 43. The device is connected to the memory through the communication bus, and the memory stores an instruction for implementing the channel processing method;

When the processor 41 retrieves the instruction stored in the memory 42, the following steps can be performed:

Estimating a maximum number of subchannel sets over which the line can carry bits based on the measured line parameters of the line;

For example, the estimating, according to the measured line parameters of the line, the maximum number of subchannels that the line can carry bits, including:

Measuring the electrical length k10 parameter of the line, estimating the channel attenuation H(i) of the line; according to the estimated channel attenuation H(i) and the power spectral density transmitted by the transmitting end of the line

PSD, which estimates the maximum number of subchannels that the line can carry without crosstalk and only background noise.

For example, the obtaining a current bit loading table of the line, determining a maximum subchannel set of the current bearer bit of the line according to the current bit loading table, includes:

Determining, according to the on state information of each subchannel of the line included in the current bit loading table, a maximum subchannel set in which the line can currently carry bits. For example, according to the estimated maximum subchannel set, the state information of the subchannels other than the largest subchannel set of the current bearer bit of the line and belonging to the estimated maximum subchannel set is The shutdown status information is set to the on status information, including:

And setting, according to the estimated maximum subchannel set, a subchannel other than the largest subchannel set in the current bit loading table gi and belonging to the estimated maximum subchannel set to 0 as the state information is The subchannel of 1 enables the high frequency subchannels that are turned off due to the relatively low SNR during the channel discovery phase to also carry bits.

Further, the device may further include a communication interface, and is communicatively connected to other network element devices through the communication interface.

FIG. 5 is a schematic structural diagram of a channel processing apparatus according to another embodiment of the present invention; the transmitting end of the line is applied to a vectorized crosstalk cancellation VECTOR system, as shown in FIG. 5, including: a sending module 51, configured to Receiving, by the receiving end of the line, a current bit loading table of the line, so that the receiving end determines a maximum subchannel set of the current bearer bit of the line according to the current bit loading table; and modifying according to the estimated maximum subchannel set The current bit loading table, that is, the state information of the subchannels other than the largest subchannel set of the current bearer bit of the line and belonging to the estimated maximum subchannel set is set from the off state information to the on state information; And sending the modified current bit loading table to the sending end of the line, where the estimated maximum subchannel set is the receiving end of the line according to the measured line The line parameter is used to estimate a maximum subchannel set in which the line can carry bits. The transmission module 52 is configured to transmit data according to a maximum subchannel set of the current bearer bit of the line included in the modified current bit loading table.

FIG. 6 is a schematic structural diagram of a channel processing apparatus according to another embodiment of the present invention. The transmitting end of the line is applied to a vectorized crosstalk cancellation VECTOR system, and includes: a processor 61, a memory 62, and a communication bus 63. The device is connected to the memory through the communication bus, and the memory stores an instruction for implementing the channel processing method;

When the processor 61 retrieves the instructions stored in the memory 62, the following steps may be performed:

Transmitting, to the receiving end of the line, a current bit loading table of the line, so that the receiving end determines a maximum subchannel set of the current bearer bit of the line according to the current bit loading table; according to the estimated maximum subchannel set Modifying the current bit loading table, that is, setting the state information of the subchannels other than the largest subchannel set of the current bearer bit of the line and belonging to the estimated maximum subchannel set from the off state information to the on state And transmitting the modified current bit loading table to the transmitting end of the line, where the estimated maximum subchannel set is that the receiving end of the line estimates the line according to the measured line parameter of the line The line can carry the largest set of subchannels of bits;

According to the modified current bit loading table, the current bearer bit of the line included in the table The largest subchannel set transmits data.

FIG. 7 is a schematic structural diagram of a channel processing system according to another embodiment of the present invention, which is applied to a vectorized crosstalk cancellation VECTOR system, as shown in FIG. 7, comprising: a receiving end 71 and a transmitting end 72;

The receiving end 71 includes the channel processing apparatus as described in the embodiment shown in FIG. 3 or 4. For details, refer to the related description in the embodiment shown in FIG. 3 or 4, and details are not described herein again.

The transmitting end 72 includes the channel processing apparatus as described in the embodiment shown in FIG. 5 or 6. For details, refer to the related description in the embodiment shown in FIG. 5 or 6, and details are not described herein again.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional units are stored in a storage medium and include a number of instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform some of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a mobile hard disk, a read-only memory (English: Read-Only Memory, ROM for short), a random access memory (English: Random Access Memory, RAM for short), a magnetic disk or an optical disk, and the like. The medium of the code.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced; and the modifications or substitutions do not deviate from the technical scope of the technical solutions of the embodiments of the present invention.

Claims

claims

1. A channel processing method applied to the vectorized crosstalk cancellation VECTOR system, which is characterized by including:

The receiving end of the line estimates the maximum sub-channel set that the line can carry bits based on the measured line parameters of the line;

Obtain the current bit loading table of the line, and determine the maximum set of subchannels currently carrying bits on the line based on the current bit loading table;

According to the estimated maximum sub-channel set, modify the current bit loading table, that is, the status of the sub-channels that are outside the maximum sub-channel set that the line currently carries bits and belong to the estimated maximum sub-channel set The information is set from the off state information to the on state information; and the modified current bit loading table is sent to the sending end of the line, so that the sending end is configured according to all the information included in the modified current bit loading table. The maximum set of subchannels currently carrying bits on the said line sends data.

2. The method according to claim 1, characterized in that the receiving end of the line estimates the maximum set of subchannels that the line can carry bits based on the measured line parameters of the line, including:

The electrical length klO parameter of the line measured by the receiving end of the line is used to estimate the channel attenuation H(i) of the line; based on the estimated channel attenuation H(i) and the power sent by the transmitting end of the line Spectral Density PSD estimates the maximum set of sub-channels that the line can carry without crosstalk and only background noise.

3. The method according to claim 1 or 2, characterized in that: obtaining the current bit loading table of the line and determining the maximum set of subchannels currently carried by the line according to the current bit loading table includes:

In the channel analysis and interaction phase, the receiving end of the line receives the current bit loading table of the line sent by the transmitting end of the line. The current bit loading table includes status information of each sub-channel of the line. , the status information includes open status information and/or closed status information;

According to the opening status information of each sub-channel of the line included in the current bit loading table, the maximum set of sub-channels that can currently carry bits on the line is determined.

4. The method according to any one of claims 1 to 3, characterized in that, according to the estimated maximum sub-channel set, the current bit loading table is modified, that is, the maximum sub-channel currently carrying bits of the line is The status information of sub-channels outside the channel set and belonging to the estimated maximum sub-channel set is set from closed status information to open status information, including:

According to the estimated maximum sub-channel set, set the sub-channels whose status information is 0 outside the maximum sub-channel set in the current bit loading table and within the estimated maximum sub-channel set as status information is 1 sub-channel, so that the high-frequency sub-channel that was closed during the channel discovery phase can carry bits.

5. A channel processing method applied to the vectorized crosstalk cancellation VECTOR system, which is characterized by including:

The sending end of the line sends the current bit loading table of the line to the receiving end of the line, so that the receiving end determines the maximum set of subchannels currently carrying bits on the line based on the current bit loading table; according to the estimated Maximum sub-channel set, modify the current bit loading table, that is, the status information of the sub-channels outside the maximum sub-channel set currently carrying bits on the line and belonging to the estimated maximum sub-channel set is changed from the closed status information Set to enable status information; and send the modified current bit loading table to the sending end of the line, and the estimated maximum sub-channel set is the line parameter of the line measured by the receiving end of the line. , estimate the maximum set of subchannels that the line can carry bits;

The sending end of the line transmits data according to the maximum sub-channel set of bits currently carried by the line included in the modified current bit loading table.

6. A channel processing device, located at the receiving end of the line, applied to the vectorized crosstalk cancellation VECTOR system, which is characterized by including:

An estimation module, configured to estimate the maximum set of subchannels that the line can carry bits based on the measured line parameters of the line;

A determination module, configured to obtain the current bit loading table of the line, and determine the maximum set of subchannels currently carrying bits on the line according to the current bit loading table;

Modification module, configured to modify the current bit loading table according to the maximum sub-channel set estimated by the estimation module, that is, the maximum sub-channel set that the line currently carries bits determined by the determination module is outside and belongs to the The status information of the subchannels within the estimated maximum subchannel set is set from the off status information to the on status information; A sending module, configured to send the current bit loading table modified by the modification module to the sending end of the line, so that the sending end carries the current bearer of the line included in the modified current bit loading table. The largest subchannel set of bits to send data.

7. The device according to claim 6, characterized in that the estimation module is specifically used for:

The measured electrical length klO parameter of the line is used to estimate the channel attenuation H(i) of the line; based on the estimated channel attenuation H(i) and the power spectral density PSD sent by the transmitting end of the line, estimate the The maximum set of sub-channels that the line can carry without crosstalk and only background noise.

8. The device according to claim 6 or 7, characterized in that the determination module is specifically used for:

In the channel analysis and interaction phase, the current bit loading table of the line is received from the transmitting end of the line. The current bit loading table includes status information of each sub-channel of the line. The status information includes Turn status information on and/or turn off status information;

According to the open status information of each sub-channel of the line included in the current bit loading table, the maximum set of sub-channels currently carrying bits on the line is determined.

9. The device according to any one of claims 6 to 8, characterized in that the modification module is specifically configured to load the current bits into the maximum subchannel in the table according to the estimated maximum subchannel set. Subchannels with status information of 0 outside the set and within the estimated maximum subchannel set are set to subchannels with status information of 1, so that the high-frequency subchannels that were turned off during the channel discovery phase can carry bits.

10. A channel processing device, located at the transmitting end of the line, applied to the vectorized crosstalk cancellation VECTOR system, which is characterized by including:

A sending module, configured to send the current bit loading table of the line to the receiving end of the line, so that the receiving end determines the maximum set of sub-channels currently carrying bits on the line based on the current bit loading table; based on estimation; The maximum set of sub-channels, setting the status information of the sub-channels outside the maximum set of sub-channels currently carrying bits on the line and belonging to the estimated maximum set of sub-channels from the off status information to the on status information; and The modified current bit loading table is sent to the sending end of the line. The estimated maximum sub-channel set is the receiving end of the line, which estimates that the line can carry the load based on the measured line parameters of the line. The largest subchannel set of bits;

A transmission module, configured to transmit data according to the maximum sub-channel set of bits currently carried by the line included in the modified current bit loading table.

1 1. A channel processing device, located at the receiving end of the line, applied to the vectorized crosstalk cancellation VECTOR system, characterized in that it includes: a processor, a memory and a communication bus, and the processor communicates with all components through the communication bus. The memory is connected, and instructions for implementing the channel processing method are stored in the memory;

When the processor retrieves the instructions stored in the memory, the following steps may be performed: According to the measured line parameters of the line, estimate the maximum sub-channel set that the line can carry bits;

12. The device according to claim 11, characterized in that: estimating the maximum sub-channel set that the line can carry bits based on the measured line parameters of the line includes: the measured electrical parameters of the line The length klO parameter is used to estimate the channel attenuation H(i) of the line; based on the estimated channel attenuation H(i) and the power spectral density PSD sent by the transmitting end of the line, it is estimated that the line has no crosstalk and only The maximum set of sub-channels that can be carried in the presence of background noise.

13. The device according to claim 11 or 12, characterized in that, said obtaining the current bit loading table of the line, determining the maximum sub-channel set of the line currently carrying bits according to the current bit loading table, include:

In the channel analysis and interaction phase, the current bit loading table of the line is received from the transmitting end of the line. The current bit loading table includes status information of each sub-channel of the line. The status information includes Turn status information on and/or turn off status information; According to the opening status information of each sub-channel of the line included in the current bit loading table, the maximum set of sub-channels that can currently carry bits on the line is determined.

14. The device according to any one of claims 1 to 13, characterized in that: the current bit loading table is modified according to the estimated maximum sub-channel set, that is, the maximum number of bits currently carried by the line is Setting the status information of the subchannels outside the subchannel set and within the estimated maximum subchannel set from the off status information to the on status information includes: according to the estimated maximum subchannel set, changing the current The sub-channels with status information of 0 outside the maximum sub-channel set in the bit loading table and within the estimated maximum sub-channel set are set to sub-channels with status information of 1, so that the high-speed channels that are turned off during the channel discovery phase are Frequency subchannels can carry bits.

15. A channel processing device, located at the transmitting end of the line, applied to the vectorized crosstalk cancellation VECTOR system, characterized in that it includes: a processor, a memory and a communication bus, and the processor communicates with the communication bus through the communication bus Memory connection, the memory stores instructions for implementing the channel processing method;

When the processor retrieves the instruction stored in the memory, the following steps may be performed: Send the current bit loading table of the line to the receiving end of the line, so that the receiving end loads the table according to the current bit Determine the maximum set of subchannels currently carrying bits on the line; modify the current bit loading table according to the estimated maximum set of subchannels, that is, the maximum set of subchannels currently carrying bits on the line are outside and belong to the estimated The status information of the subchannels within the maximum subchannel set is set from the off status information to the on status information; and the modified current bit loading table is sent to the transmitting end of the line, the estimated maximum subchannel set It is the receiving end of the line that estimates the maximum sub-channel set that the line can carry bits based on the measured line parameters of the line;

Data is transmitted according to the maximum sub-channel set of bits currently carried by the line included in the modified current bit loading table.

16. A channel processing system applied to a vectorized crosstalk cancellation VECTOR system, characterized in that the system includes: the channel processing device located at the line receiving end according to any one of claims 6-9 and claim 10 The channel processing device located at the transmitting end of the line.