WO2018119603A1 - Procédé, dispositif, et système de traitement d'informations de ligne - Google Patents

Procédé, dispositif, et système de traitement d'informations de ligne Download PDF

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Publication number
WO2018119603A1
WO2018119603A1 PCT/CN2016/112188 CN2016112188W WO2018119603A1 WO 2018119603 A1 WO2018119603 A1 WO 2018119603A1 CN 2016112188 W CN2016112188 W CN 2016112188W WO 2018119603 A1 WO2018119603 A1 WO 2018119603A1
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WIPO (PCT)
Prior art keywords
symbol
line information
symbols
transmission symbol
cancellation coefficient
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PCT/CN2016/112188
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English (en)
Chinese (zh)
Inventor
王威扬
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华为技术有限公司
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Priority to PCT/CN2016/112188 priority Critical patent/WO2018119603A1/fr
Publication of WO2018119603A1 publication Critical patent/WO2018119603A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/32—Reducing cross-talk, e.g. by compensating
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a line information processing method, apparatus, and system.
  • Copper subscriber access technologies such as Digital Subscriber Line (DSL) have obvious comparative advantages in investment, operation and maintenance, etc.
  • ITU-T International Telecom The Alliance
  • FTTdp next-generation copper broadband access technology
  • FTTdp fiber to the distribution point
  • the goal is to provide an access rate of more than 500 Mbps in the range of 100 m. Due to the shortened transmission distance, the copper channel has a higher transmission capacity. Effectively implementing these transmission capabilities will provide bandwidth guarantees for future high-bandwidth services.
  • TDD Time Division Duplexing
  • DSLAM Digital Subscriber Line Access Multiplexer
  • G.fast uplink and downlink channels use TDD, near-end crosstalk can be avoided by superframe synchronization of the distribution point, but because the frequency band used by G.fast is wider and wider, far-end crosstalk is more and more seriously affecting the line.
  • the transmission performance, severe far-end crosstalk significantly reduces the channel rate.
  • VCE Vectoring Control Entity
  • the vectorized feedback sample on the synchronization symbol updates the crosstalk channel information, and then calculates a new cancellation coefficient based on the updated crosstalk channel information.
  • the synchronization symbol may be destroyed by the external burst noise, so that the VCE calculates the updated crosstalk channel information according to the corresponding vectorized feedback sample, and cannot truly reflect the crosstalk channel, and the new offset calculated on the basis of this.
  • the coefficients also do not adapt to the current crosstalk channel. If such a cancellation factor is applied, a large number of errors will occur on the line, which may cause a serious drop.
  • An existing method for solving the above problem is: before updating the crosstalk channel information according to the vectorized feedback sample, the VCE detects the vectorized feedback sample fed back by the transceiver to determine whether it is surrounded by external noise such as impulse noise. damage. If not, the process of updating the crosstalk channel information, calculating the new cancellation coefficient, and applying the new cancellation coefficient is performed normally; if yes, the corresponding all vectorized feedback samples are discarded, and the vectorized feedback samples are re-collected to update the crosstalk channel.
  • the effectiveness of the above method depends on the accuracy of the VCE to judge whether the vectorized feedback sample is corrupted. If the vectorized feedback sample is destroyed by the external burst noise but the VCE is not detected, the VCE still uses the corrupted vector. The feedback sample is updated to update the crosstalk channel information, and then the new cancellation coefficient is calculated. Then, after the new cancellation coefficient is applied, a large number of errors or dropped lines may occur, resulting in poor stability of the line.
  • Embodiments of the present invention provide a line information processing method, apparatus, and system, which avoids instability of a line caused by a crosstalk cancellation coefficient error caused by an abnormality of a vectorized feedback sample.
  • an embodiment of the present invention provides a method for processing line information, including:
  • a new cancellation coefficient is applied to the partial transmission symbol of the symbol to be transmitted, and the original cancellation coefficient is applied to the transmission symbol except the partial transmission symbol, and the transmission symbol includes the data symbol.
  • the near-end device obtains real-time line information and monitors line information. By monitoring the line information of the transmission symbol applying the new cancellation coefficient, it can be known whether the information channel on the symbol applying the new cancellation coefficient is stable, and thus whether the new cancellation coefficient can be used to all the transmission symbols, thereby avoiding the vector
  • the error of the crosstalk cancellation coefficient caused by the abnormality of the feedback sample causes the instability of the line and enhances the stability of the line.
  • it also includes:
  • the near-end device Repeat monitoring of real-time line information within a preset time to determine all within the preset time When the real-time line information acquired at the time point meets the preset condition, the near-end device applies a new offset coefficient on all the transmitted symbols.
  • a new cancellation coefficient is applied to the partial transmission symbol of the symbol to be transmitted, and the original cancellation coefficient is applied to the transmission symbol except the partial transmission symbol, and then the near-end device
  • the real-time line information is repeatedly monitored within a preset time, and when the real-time line information acquired at all time points in the preset time meets the preset condition, a new offset coefficient is applied to all the transmitted symbols within the preset time.
  • the near-end device applies the original cancellation coefficient on the part of the transmission symbol.
  • the method before applying a new cancellation coefficient on the partial transmission symbol of the symbol to be transmitted, the method further includes:
  • the near end device determines the number and location of the partially transmitted symbols.
  • the near-end device determines the number of partial transmission symbols, including: the near-end device calculates a ratio of partial transmission symbols to all transmission symbols based on the data traffic.
  • the near-end device determines the location of the partially transmitted symbol, the symbol location for transmitting the management information is excluded.
  • the near-end device obtains real-time line information, including: in the uplink direction, the near-end device detects real-time line information; in the downlink direction, the near-end device receives the remote device detected by the remote device. Real-time line information.
  • the line information is the line information on the partially transmitted symbols or the line information on all transmitted symbols.
  • the line information includes at least one of a signal-to-noise ratio SNR, a number of codewords in which the forward error correction code FEC is error-corrected, and a number of codewords in which the cyclic redundancy check CRC is erroneous.
  • the preset conditions are:
  • the number of codewords on the partial transmission symbol is increased by 0 or the number of codewords whose FEC is error-corrected is less than the first preset threshold, or the number of codewords with CRC errors on all transmitted symbols increases.
  • the amount of codewords whose amount is 0 or FEC is error-corrected is less than the second predetermined threshold; and/or, the first reachable rate on the transmitted symbol to which the new cancellation coefficient is applied is greater than or equal to the applied offset coefficient.
  • a times the second reachable rate on the transmitted symbol, a is less than or equal to 1.
  • the first reachable rate is calculated from the SNR on all transmitted symbols to which the new cancellation factor is applied, and the second reachable rate is calculated from the SNR on all transmitted symbols to which the original cancellation factor is applied.
  • the method further includes: transmitting the preset reference data on the transmission symbol applying the new cancellation coefficient; or pre-lowering the bit loading on the transmission symbol applying the new cancellation coefficient. It is possible to avoid a large number of errors caused by a new offset coefficient being incorrectly caused by a large drop in SNR.
  • the transmission symbols applying the new cancellation coefficients do not include the robust management channel RMC symbols.
  • the symbol positions of the discontinuous working intervals DOI of all lines are identical.
  • the method further includes: the near-end device sending indication information to the remote device, where the indication information is used to indicate that the remote device sends data on all data symbols of the DOI after the specified superframe .
  • the method before applying the new cancellation coefficient on the part of the transmission symbol, the method further includes: the near-end device initiating the first TIGA, where the first TIGA is used to adjust the bit loading table and the gain value of the DOI in the downlink direction;
  • the near-end device Before the near-end device applies the new cancellation factor to all transmitted symbols, it also includes:
  • the near-end device initiates a second TIGA, and the second TIGA is used to adjust the bit loading table and the gain value of the continuous working interval NOI in the downlink direction.
  • the received signal gain change value included in the second TIGA is greater than or equal to the received signal gain change value included in the first TIGA and the reciprocal of the gain adjustment value of the remote device to the first TIGA feedback. product.
  • an embodiment of the present invention provides a line information processing apparatus, including:
  • a processing module after calculating a new cancellation coefficient, applying a new cancellation coefficient on a part of the transmission symbol of the symbol to be transmitted, applying an original cancellation coefficient on the transmission symbol except the partial transmission symbol, and transmitting the symbol Includes data symbols.
  • the acquisition module is used to obtain real-time line information.
  • a monitoring module for monitoring line information. By monitoring the line information of the transmission symbol applying the new cancellation coefficient, it can be known whether the information channel on the symbol applying the new cancellation coefficient is stable, and thus whether the new cancellation coefficient can be used to all the transmission symbols, thereby avoiding the vector
  • the error of the crosstalk cancellation coefficient caused by the abnormality of the feedback sample causes the instability of the line Set the problem and enhance the stability of the line.
  • the monitoring module is further configured to: repeatedly monitor real-time line information within a preset time; the processing module is further configured to: determine, in the monitoring module, real-time acquired at all time points within a preset time When the line information meets the preset conditions, a new offset coefficient is applied to all transmitted symbols.
  • the processing module is further configured to determine the number and location of the partially transmitted symbols before applying the new cancellation coefficients on the partial transmission symbols of the symbols to be transmitted.
  • the processing module is specifically configured to: calculate, according to the data traffic, a proportion of the transmitted symbols to all the transmitted symbols.
  • the processing module determines the location of the partially transmitted symbol, the symbol location for transmitting the management information is excluded.
  • the acquiring module is specifically configured to: detect real-time line information in an uplink direction; and receive real-time line information detected by a remote device sent by a remote device in a downlink direction.
  • the line information is the line information on the partially transmitted symbols or the line information on all transmitted symbols.
  • the line information includes at least one of a signal-to-noise ratio SNR, a number of codewords in which the forward error correction code FEC is error-corrected, and a number of codewords in which the cyclic redundancy check CRC is erroneous.
  • the preset conditions are:
  • the number of codewords on the partial transmission symbol is increased by 0 or the number of codewords whose FEC is error-corrected is less than the first preset threshold, or the number of codewords with CRC errors on all transmitted symbols increases.
  • the amount of codewords whose amount is 0 or FEC is error-corrected is less than the second predetermined threshold; and/or, the first reachable rate on the transmitted symbol to which the new cancellation coefficient is applied is greater than or equal to the applied offset coefficient.
  • the first reachable rate is calculated according to the SNR on all transmitted symbols applying the new cancellation coefficient
  • the second reachable rate is based on the application original
  • the processing module is further configured to: transmit the preset reference data on the transmission symbol to which the new cancellation coefficient is applied; or to lower the bit loading in advance on the transmission symbol to which the new cancellation coefficient is applied.
  • the transmission symbols applying the new cancellation coefficients do not include the robust management channel RMC symbols.
  • the symbol positions of the discontinuous working intervals DOI of all lines are identical.
  • it also includes:
  • a sending module configured to send, to the remote device, the indication information, where the indication information is used to instruct the remote device to send data on all data symbols of the DOI after the specified superframe.
  • processing module is further configured to:
  • the first TIGA Before applying the new cancellation coefficient on the partial transmission symbol, initiating a first TIGA, the first TIGA is used to adjust a bit loading table and a gain value of the DOI in the downlink direction; applying the new cancellation coefficient on all transmission symbols Previously, a second TIGA is initiated, which is used to adjust the bit loading table and the gain value of the continuous working interval NOI in the downlink direction.
  • the received signal gain change value included in the second TIGA is greater than or equal to the received signal gain change value included in the first TIGA and the reciprocal of the gain adjustment value of the remote device to the first TIGA feedback. product.
  • an embodiment of the present invention provides a communication system, including a remote device, and the device of any of the second aspect and the second aspect.
  • an embodiment of the present invention provides a line information processing apparatus, including:
  • a processor after calculating a new cancellation coefficient, applying a new cancellation coefficient on a part of the transmission symbol of the symbol to be transmitted, applying an original cancellation coefficient on the transmission symbol other than the partial transmission symbol, and transmitting the symbol Includes data symbols.
  • Receiver for obtaining real-time line information.
  • the processor is also used to monitor line information. By monitoring the line information of the transmission symbol applying the new cancellation coefficient, it can be known whether the information channel on the symbol applying the new cancellation coefficient is stable, and thus whether the new cancellation coefficient can be used to all the transmission symbols, thereby avoiding the vector
  • the error of the crosstalk cancellation coefficient caused by the abnormality of the feedback sample causes the instability of the line and enhances the stability of the line.
  • the processor is further configured to: repeatedly monitor real-time line information within a preset time; the processor is further configured to: determine real-time line information acquired at all time points within a preset time When the preset condition is met, a new cancellation factor is applied to all transmitted symbols.
  • the processor is further configured to: transmit a symbol in a portion of the symbol to be transmitted Before applying the new cancellation factor, determine the number and location of the partial transmission symbols.
  • the processor is specifically configured to: calculate, according to the data traffic, a proportion of the transmitted symbols in all the transmitted symbols.
  • the processor determines the location of the partially transmitted symbol, the symbol location for transmitting the management information is excluded.
  • the receiver is specifically configured to: detect real-time line information in an uplink direction; and receive real-time line information detected by a remote device sent by a remote device in a downlink direction.
  • the line information is the line information on the partially transmitted symbols or the line information on all transmitted symbols.
  • the line information includes at least one of a signal-to-noise ratio SNR, a number of codewords in which the forward error correction code FEC is error-corrected, and a number of codewords in which the cyclic redundancy check CRC is erroneous.
  • the preset conditions are:
  • the number of codewords on the partial transmission symbol is increased by 0 or the number of codewords whose FEC is error-corrected is less than the first preset threshold, or the number of codewords with CRC errors on all transmitted symbols increases.
  • the amount of codewords whose amount is 0 or FEC is error-corrected is less than the second predetermined threshold; and/or, the first reachable rate on the transmitted symbol to which the new cancellation coefficient is applied is greater than or equal to the applied offset coefficient.
  • the first reachable rate is calculated according to the SNR on all transmitted symbols applying the new cancellation coefficient
  • the second reachable rate is based on the application original
  • the processor is further configured to: transmit the preset reference data on the transmission symbol to which the new cancellation coefficient is applied; or to pre-down the bit loading on the transmission symbol to which the new cancellation coefficient is applied.
  • the transmission symbols applying the new cancellation coefficients do not include the robust management channel RMC symbols.
  • the symbol positions of the discontinuous working intervals DOI of all lines are identical.
  • the method further includes: a transmitter, configured to send, to the remote device, indication information, where the indication information is used to indicate all data symbols of the DOI of the remote device after the specified superframe Send data on the number.
  • the processor is also used to:
  • the first TIGA Before applying the new cancellation coefficient on the partial transmission symbol, initiating a first TIGA, the first TIGA is used to adjust a bit loading table and a gain value of the DOI in the downlink direction; applying the new cancellation coefficient on all transmission symbols Previously, a second TIGA is initiated, which is used to adjust the bit loading table and the gain value of the continuous working interval NOI in the downlink direction.
  • the received signal gain change value included in the second TIGA is greater than or equal to the received signal gain change value included in the first TIGA and the reciprocal of the gain adjustment value of the remote device to the first TIGA feedback. product.
  • an embodiment of the present invention provides a communication system, including a remote device, and the device of any of the fourth aspect and the fourth aspect.
  • Embodiment 1 is a schematic flowchart of Embodiment 1 of a line information processing method according to the present invention
  • Embodiment 2 is a schematic flowchart of Embodiment 2 of a method for processing line information provided by the present invention
  • FIG. 3 is a schematic flowchart of a downlink direction in a third embodiment of a line information processing method according to the present invention.
  • Embodiment 4 is a schematic flowchart of an uplink direction in Embodiment 3 of a method for processing line information according to the present invention
  • FIG. 5 is a schematic structural diagram of Embodiment 1 of a line information processing apparatus according to the present invention.
  • Embodiment 2 of a line information processing apparatus according to the present invention
  • FIG. 7 is a schematic structural diagram of Embodiment 3 of a line information processing apparatus according to the present invention.
  • FIG. 8 is a schematic structural diagram of Embodiment 4 of a line information processing apparatus according to the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access Wireless
  • UMTS Universal Mobile Telecommunications System
  • the technical solution of the embodiments of the present invention is mainly applied to a communication system that requires crosstalk/interference cancellation, precoding between multiple transceivers, or post coding between multiple transceivers, and involves precoding or post coding coefficients to be updated.
  • the method in the embodiment of the invention can be used.
  • the technical solution of the embodiment of the present invention is mainly applied to the DSL access technology and the next-generation copper broadband access technology G.fast.
  • the network element involved is a near-end device (also Called as a central office device) and a remote device.
  • the method, device and system for processing line information according to embodiments of the present invention are used to avoid instability of a line caused by a crosstalk cancellation coefficient error caused by an abnormality of a vectorized feedback sample when crosstalk/interference cancellation is required, such as a large rate drop, There are a lot of errors, dropped calls, and so on.
  • the technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
  • FIG. 1 is a schematic flowchart of Embodiment 1 of a method for processing line information provided by the present invention. As shown in FIG. 1 , the method includes:
  • the near-end device After calculating the new cancellation coefficient, the near-end device applies a new cancellation coefficient on the partial transmission symbol of the symbol to be transmitted, and applies the original cancellation coefficient on the transmission symbol except the partial transmission symbol, where the transmission symbol includes the data. symbol.
  • the near-end device updates the crosstalk channel information according to the received vectorized feedback sample, and calculates a new cancellation coefficient according to the updated crosstalk channel information, and after calculating the new cancellation coefficient, transmits the symbol in the part of the symbol to be transmitted.
  • the new cancellation factor is applied and the original cancellation factor is applied to the other transmission symbols.
  • the method before applying the new cancellation coefficient on the partial transmission symbol of the symbol to be transmitted, the method further includes: determining, by the near-end device, the number and location of the partial transmission symbols.
  • the near-end device may calculate the proportion of the transmitted symbols to all of the transmitted symbols based on the data traffic. When the near-end device determines the location of the partial transmission symbol, the symbol position for transmitting the management information is excluded, such as the Robust Management Channel (RMC) symbol in G.fast.
  • RMC Robust Management Channel
  • the determined number of partial transmission symbols may or may not change; that is, at each time point.
  • the number of symbols selected by the near-end device from the symbols to be transmitted in the port transmission queue may be the same or different; for example, when there is a significant increase in line traffic
  • the ratio of the symbol using the new cancellation coefficient to all the transmission symbols needs to be reduced according to the flow rate adjustment; if there is no significant increase in the flow rate, the ratio of the symbol using the new cancellation coefficient to all the transmission symbols can remain unchanged.
  • the determined position of the partial transmission symbol may be a preset position.
  • the new offset coefficient and the original offset coefficient do not change during the preset time period.
  • the near-end device acquires real-time line information and monitors line information.
  • the near-end device can obtain the line condition of applying the new cancellation coefficient by monitoring the obtained real-time line information, for example, it can monitor whether the line applying the new cancellation coefficient generates a large number of errors or dropped lines, resulting in the line. The stability is poor. If yes, it can be switched back to the original cancellation coefficient. If not, the new cancellation coefficient can be used from the partial transmission symbol to the entire transmission symbol. Therefore, the crosstalk cancellation coefficient due to the vectorized feedback sample abnormality can be avoided. The problem caused by the instability of the line.
  • the method may further include: repeatedly monitoring real-time line information within a preset time, and determining that the real-time line information acquired at all time points in the preset time meets the preset condition, and the near-end device transmits the symbol at all times. Apply a new offset factor. If it is determined that the line information acquired at a certain time in the preset time does not satisfy the preset condition, the near-end device applies the original offset coefficient on all the transmitted symbols. Thereby, the problem of instability of the line due to the crosstalk cancellation coefficient error can be avoided, and the stability of the line is enhanced.
  • the near-end device obtains real-time line information, and in the uplink direction, the near-end device can directly detect the real-time line information; in the downlink direction, the near-end device receives the real-time line information detected by the remote device and sent by the remote device. .
  • the line information may be line information on part of the transmitted symbols or line information on all transmitted symbols.
  • the line information may include a Signal Noise Ratio (SNR), a Forward Error Correction (FEC) error-corrected codeword number, and a Cyclic Redundancy Check (Cyclic Redundancy Check, Abbreviation: CRC) At least one of the number of erroneous codewords.
  • SNR Signal Noise Ratio
  • FEC Forward Error Correction
  • CRC Cyclic Redundancy Check
  • the preset condition is that the number of codewords of the CRC error on the partial transmission symbol is increased by 0 or the number of codewords whose FEC is error-corrected is less than the first preset threshold, or on all transmission symbols.
  • the number of codewords of the CRC error is increased by 0 or the number of codewords whose FEC is error-corrected is less than the second predetermined threshold; and/or the first of the transmission symbols to which the new cancellation coefficient is applied.
  • the reachable rate is greater than or equal to a times the second reachable rate on the transmission symbol to which the original cancellation factor is applied, a is less than or equal to 1, and the first reachable rate is based on the SNR on all transmitted symbols to which the new offset coefficient is applied. It is calculated that the second reachable rate is calculated from the SNR on all transmitted symbols applying the original cancellation factor.
  • the foregoing embodiment may further include: transmitting preset reference data on a transmission symbol to which a new cancellation coefficient is applied; or , the bit loading is previously lowered on the transmission symbol to which the new cancellation factor is applied.
  • a new offset coefficient is applied to the partial transmission symbol of the symbol to be transmitted, and the original symbol is applied to the transmission symbol except the partial transmission symbol.
  • the transmission symbols are data symbols.
  • the transmission symbol also includes an RMC symbol, that is, the transmission symbol includes a data symbol and an RMC symbol.
  • the discontinuous operation interval (DOI) of all lines corresponds to the same symbol position, that is, the logical frame of all ports in a certain transmission direction. The parameters are the same.
  • TDD Time Division Duplexing
  • TDD is a half-duplex multiplexing mode, in which all uplink and downlink occupies all subcarriers of the entire frequency band to transmit information, and the system allocates time slots separately.
  • the transceiver at one end of the same time slot can only send or receive, and the opposite end is in the Time slots can only take the opposite action.
  • the G.fast standard has adopted a Super Frame structure.
  • the DOI is introduced, and in each TDD logical frame, it is divided into a normal operating interval (NOI) and a discontinuous working interval (DOI).
  • NOI normal operating interval
  • DOI discontinuous working interval
  • the TDD frame structure of the different ports in a vectored group, and the superframe structure, and the NOI interval are fully aligned.
  • All symbols in the NOI interval are data symbols except for the RMC symbol.
  • the silence symbol and the position of the data symbol in the DOI of different ports may be misaligned.
  • the port does not send any signal on its silent symbol and thus does not transmit data on the silence symbol.
  • How many symbols are transmitted in the NOI interval and DOI in a TDD frame which symbol positions belong to the NOI interval transmission, which symbol positions belong to the DOI, which symbol positions in the DOI are silent symbols, and which symbol positions are data symbols, and the information is in the line
  • the working state can be reconfigured, and the corresponding parameter is called a logical frame parameter.
  • the NOI interval in both directions of the uplink and downlink and the symbol assignment of the DOI in each TDD frame are transmitted by the near-end device to the remote device through the RMC.
  • it may further include:
  • the near-end device sends indication information to the remote device, where the indication information is used to instruct the remote device to send data on all data symbols of the DOI after the specified superframe.
  • the data transmitted at the DOI is normal data or data containing only a previously agreed reference signal.
  • the central office device sends a request to the near-end device, and the near-end device reports the SNR of the DOI.
  • the near-end device in the vectorization group receives two Transmitter Initiated Gain Adjustments (TIGAs), which are respectively applied to the DOI and the NOI, and are effective in the first TIGA.
  • TIGAs Transmitter Initiated Gain Adjustments
  • the method further includes: the near-end device initiating the first TIGA, where the first TIGA is used to adjust the bit loading table and the gain value of the DOI in the downlink direction.
  • the method further includes: the near-end device initiates the second TIGA, and the second TIGA is used to adjust the bit loading table and the gain value of the NOI.
  • the transmitter-initiated TIGA is used to process the downlink direct channel precoding gain change of the VCE, and the near-end device sends the TIGA command to the remote device, and the TIGA command includes the gain change value and the bit loading table requested by the near-end device. .
  • the remote device sends a seamless rate adaptation (SRA) message as a response to the TIGA command. (TIGARESP).
  • SRA seamless rate adaptation
  • TIGARESP seamless rate adaptation
  • the remote device can accept the gain change value and the bit loading table requested in the TIGA in the TIGARESP message. If the remote device cannot accept the gain change value or the bit loading table requested in the TIGA, the TIGARESP message sent by the remote device must include the gain adjustment value and the bit loading table. Then the gain change and the effective process of the bit loading table are the same as the effective process of the SRA.
  • the received signal gain change value included in the second TIGA is greater than or equal to a product of a received signal gain change value included in the first TIGA and a reciprocal of the far-end device's gain adjustment value for the first TIGA feedback.
  • Embodiment 2 is a schematic flowchart of Embodiment 2 of a method for processing line information provided by the present invention. As shown in FIG. 2, the method includes:
  • the near-end device updates the crosstalk channel information according to the received vectorized feedback sample, and calculates a new cancellation coefficient according to the updated crosstalk channel information.
  • the time t 1 to t 2 the proximal end of the real-time monitoring apparatus repeats line information, it is determined at time t 1 line information in real time to all the points in time t 2 satisfy a preset condition acquired, execution S204 . If the line information acquired at a certain time point from time t 1 to t 2 does not satisfy the preset condition, the near-end device applies the original cancellation coefficient to the partial transmission symbol.
  • the near-end device presets a determination condition, that is, a preset condition, for example, the number of codewords whose CRC error on the partial transmission symbol increases by 0 or the number of codewords whose FEC is error-corrected increases. Less than the first preset threshold, or the number of codewords of the CRC error on all transmission symbols is increased by 0 or the number of codewords whose FEC is error-corrected is less than the second preset threshold; and/or, application new
  • the first reachable rate on the transmission symbol of the cancellation coefficient is greater than or equal to a times the second reachable rate on the transmission symbol to which the original cancellation coefficient is applied, a is less than or equal to 1, and the first reachable rate is new according to the application.
  • the SNR on all transmitted symbols of the cancellation factor is calculated, and the second reachable rate is calculated from the SNR on all transmitted symbols to which the original cancellation factor is applied.
  • the line information may be line information on the partial transmission symbol or all transmission symbols Line information on.
  • the line information may include at least one of an SNR, a number of codewords in which the FEC is error-corrected, and a number of codewords in which the CRC is erroneous.
  • the transmitter side transmits all the data on the symbol applying the new cancellation coefficient.
  • a new offset coefficient is applied to the partial transmission symbol of the symbol to be transmitted, and the original symbol is applied to the transmission symbol except the partial transmission symbol.
  • Some offset coefficients after which the near-end device repeatedly monitors the real-time line information within a preset time. When the real-time line information acquired at all time points within the preset time meets the preset condition, the new channel is applied to all the transmitted symbols.
  • the offset coefficient when the line information acquired at a certain time in the preset time does not satisfy the preset condition, the near-end device applies the original cancellation coefficient on the part of the transmitted symbol.
  • FIG. 3 is a schematic flowchart of the downlink direction in the third embodiment of the line information processing method according to the present invention. As shown in FIG. 3, the method includes:
  • the near-end device calculates a new offset coefficient.
  • S302 The near-end device adjusts logical frame parameters of all ports to be consistent by using RMC before applying the new offset coefficient.
  • the near-end device initiates a transmitter-initiated gain adjustment (TIGA) of the DOI (referred to as a first TIGA), and the first TIGA is used to adjust a bit loading table of the downlink DOI and Gain value.
  • the first TIGA includes a received signal gain change value transmitted by the near-end device.
  • the remote device responds to the first TIGA initiated by the near-end device by using an SRA message, where the SRA message includes a gain adjustment value fed back by the near-end device. And adjust the bit loading table and gain value of the DOI in the downlink direction.
  • the near-end device applies a new offset coefficient in the DOI.
  • the near-end device requests the remote device to report the SNR of the DOI.
  • the remote device reports the SNR of the DOI.
  • the near-end device determines, according to the acquired line information, whether to switch a new offset coefficient.
  • the application of the new cancellation coefficient application range is extended to include the NOI interval or the use of the new cancellation coefficient.
  • the near-end device initiates the second TIGA, and the second TIGA is used to adjust the bit loading table and the gain value of the NOI.
  • the received signal gain change value included in the second TIGA is greater than or equal to a product of a received signal gain change value included in the first TIGA and a reciprocal of the far-end device's gain adjustment value for the first TIGA feedback. And apply a new offset factor in the NOI.
  • the logical frame parameter is incremented by the RMC to increase the NOI length, and the transmitter is allowed to transmit data only at the symbol position of the NOI.
  • FIG. 4 is a schematic flowchart of an uplink direction in a third embodiment of a method for processing line information according to the present invention. As shown in FIG. 4, the method includes:
  • the near-end device calculates a new offset coefficient.
  • the near-end device adjusts the logical frame parameters of all ports to be consistent by using RMC before applying the new cancellation coefficient.
  • the near-end device applies a new offset coefficient in the DOI.
  • the near-end device determines, according to the acquired line information, whether to switch a new offset coefficient.
  • the application of the new cancellation coefficient application range is extended to include the NOI interval or the use of the new cancellation coefficient.
  • the NOI bit loading table is adjusted by On Line Reconfiguration (OLR), and a new offset coefficient is applied in the NOI.
  • OLR On Line Reconfiguration
  • the logical frame parameter is incremented by the RMC to increase the NOI length, and the transmitter is allowed to transmit data only at the symbol position of the NOI.
  • FIG. 5 is a schematic structural diagram of a first embodiment of a line information processing apparatus according to the present invention.
  • the line information processing apparatus may be a near-end device. As shown in FIG. 5, the apparatus includes: a processing module 11, an obtaining module 12, and a monitoring module 13. ,among them,
  • the processing module 11 is configured to apply the new cancellation coefficient on the partial transmission symbol of the symbol to be transmitted after calculating the new cancellation coefficient, and apply the original cancellation coefficient on the transmission symbol except the partial transmission symbol
  • the transmission symbol includes a data symbol.
  • the obtaining module 12 is configured to acquire real-time line information.
  • the monitoring module 13 is configured to monitor the line information.
  • the monitoring module 13 is further configured to repeatedly monitor real-time line information within a preset time.
  • the processing module 11 is further configured to: when the monitoring module 13 determines that the real-time line information acquired at all time points in the preset time meets the preset condition, apply the New offset factor.
  • processing module 11 is further configured to: determine the number and location of the partially transmitted symbols before applying the new cancellation coefficients on the partial transmission symbols of the symbols to be transmitted.
  • processing module 11 is specifically configured to calculate, according to the data traffic, the proportion of the partial transmission symbols to all the transmission symbols.
  • the processing module 11 determines the location of the partial transmission symbol, the symbol position for transmitting the management information is excluded.
  • the obtaining module 12 is specifically configured to: in the uplink direction, detect the real-time line information; and in the downlink direction, receive the real-time line information detected by the remote device that is sent by the remote device.
  • the line information is line information on the partial transmission symbol or line information on all transmission symbols.
  • the line information includes at least one of a signal to noise ratio SNR, a number of codewords in which the FEC is error corrected, and a number of codewords in which the CRC is faulty.
  • the preset condition is: the number of codewords of the CRC error on the partial transmission symbol increases by 0 or the number of codewords whose FEC is error-corrected is less than the first preset threshold, or all transmissions
  • the number of codewords on the symbol CRC error increases by 0 or the number of codewords whose FEC is error corrected is less than a second predetermined threshold; and/or the number of transmission symbols on which the new cancellation coefficient is applied
  • a reachable rate is greater than or equal to a times the second reachable rate on the transmission symbol to which the original cancellation coefficient is applied, a is less than or equal to 1, and the first reachable rate is based on the application of the new cancellation coefficient
  • the SNR on all transmitted symbols is calculated, and the second reachable rate is calculated from the SNR on all transmitted symbols to which the original cancellation coefficient is applied.
  • processing module 11 is further configured to: send the preset reference data on the transmission symbol to which the new cancellation coefficient is applied; or adjust the bit loading in advance on the transmission symbol to which the new cancellation coefficient is applied.
  • the transmission symbol to which the new cancellation coefficient is applied does not include the RMC symbol.
  • the symbol positions corresponding to the discontinuous working interval DOI of all lines are the same.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 1 or FIG. 2, and the implementation principle is similar, and details are not described herein again.
  • the line information processing apparatus applies a new cancellation coefficient to a part of the transmission symbol of the symbol to be transmitted after calculating the new cancellation coefficient, and applies the original offset on the transmission symbol except the partial transmission symbol.
  • Coefficient after the near-end device obtains real-time line information and monitors the line information, so by monitoring the line information of the transmission symbol applying the new cancellation coefficient, it can be known whether the information channel on the symbol applying the new cancellation coefficient is stable, and thus can be determined. Whether the new cancellation coefficient can use all the transmission symbols, thereby avoiding the instability of the line caused by the crosstalk cancellation coefficient error caused by the vectorized feedback sample abnormality, and enhancing the stability of the line.
  • FIG. 6 is a schematic structural diagram of Embodiment 2 of a line information processing apparatus according to the present invention.
  • the apparatus further includes: a sending module 14 configured to send indication information to the remote device, where the indication is The information is used to instruct the remote device to transmit data on all data symbols of the DOI after the specified superframe.
  • processing module 11 is further configured to:
  • the first TIGA Before applying the new cancellation coefficient on the partial transmission symbol, initiating a first TIGA, the first TIGA is used to adjust a bit loading table and a gain value of the DOI in the downlink direction; applying the new cancellation coefficient on all transmission symbols Previously, a second TIGA is initiated, which is used to adjust the bit loading table and the gain value of the NOI in the downlink direction.
  • the received signal gain change value included in the second TIGA is greater than or equal to a reciprocal of a received signal gain change value included in the first TIGA and a gain adjustment value of the remote device to the first TIGA feedback. product.
  • the embodiment of the invention further provides a communication system, including a remote device and the line information processing device shown in FIG. 5 or 6.
  • FIG. 7 is a schematic structural diagram of Embodiment 3 of a line information processing apparatus according to the present invention.
  • the line information processing apparatus may be a near-end device.
  • the apparatus includes: a processor 21 and a receiver 22, wherein The device 21 is configured to apply the new cancellation coefficient on a partial transmission symbol of the symbol to be transmitted after calculating a new cancellation coefficient, in addition to the partial transmission symbol
  • the original cancellation coefficients are applied to the outer transmission symbols, and the transmission symbols include data symbols.
  • the receiver 22 is used to acquire real-time line information.
  • the processor 21 is also operative to monitor the line information.
  • the processor 21 is further configured to: repeatedly monitor real-time line information within a preset time.
  • the processor 21 is further configured to: when the real-time line information acquired at all time points in the preset time meets the preset condition, apply the new cancellation coefficient on all transmission symbols.
  • processor 21 is further configured to: determine the number and location of the partially transmitted symbols before applying the new cancellation coefficients on the partial transmission symbols of the symbols to be transmitted.
  • the processor 21 is specifically configured to: calculate, according to the data traffic, a proportion of the partial transmission symbols to all transmission symbols.
  • the processor 21 determines the location of the partial transmission symbol, the symbol position for transmitting the management information is excluded.
  • the receiver 22 is specifically configured to: in the uplink direction, detect the real-time line information; and in the downlink direction, receive the real-time line information detected by the remote device that is sent by the remote device.
  • the line information is line information on the partial transmission symbol or line information on all transmission symbols.
  • the line information includes at least one of a signal to noise ratio SNR, a number of codewords in which the FEC is error corrected, and a number of codewords in which the CRC is faulty.
  • the preset condition is: the number of codewords of the CRC error on the partial transmission symbol increases by 0 or the number of codewords whose FEC is error-corrected is less than the first preset threshold, or all transmissions
  • the number of codewords on the symbol CRC error increases by 0 or the number of codewords whose FEC is error corrected is less than a second predetermined threshold; and/or the number of transmission symbols on which the new cancellation coefficient is applied
  • a reachable rate is greater than or equal to a times the second reachable rate on the transmission symbol to which the original cancellation coefficient is applied, a is less than or equal to 1, and the first reachable rate is based on the application of the new cancellation coefficient
  • the SNR on all transmitted symbols is calculated, and the second reachable rate is calculated from the SNR on all transmitted symbols to which the original cancellation coefficient is applied.
  • the processor 21 is further configured to: send the preset reference data on the transmission symbol to which the new cancellation coefficient is applied; or adjust the bit loading in advance on the transmission symbol to which the new cancellation coefficient is applied.
  • the transmission symbol further includes an RMC symbol. Discontinuous working range for all lines The transmission symbols corresponding to the DOI are in the same position.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 1 or FIG. 2, and the implementation principle is similar, and details are not described herein again.
  • the line information processing apparatus applies a new cancellation coefficient on a part of the transmission symbol of the symbol to be transmitted after calculating a new cancellation coefficient, and applies the original transmission symbol on the transmission symbol except the partial transmission symbol.
  • the near-end device obtains the real-time line information and monitors the line information. Therefore, by monitoring the line information of the transmission symbol applying the new cancellation coefficient, it can be known whether the information channel on the symbol applying the new cancellation coefficient is stable, and thus It is determined whether the new cancellation coefficient can use all the transmission symbols, thereby avoiding the problem of instability of the line caused by the crosstalk cancellation coefficient error caused by the vectorized feedback sample abnormality, and enhancing the stability of the line.
  • FIG. 8 is a schematic structural diagram of Embodiment 4 of a line information processing apparatus according to the present invention. As shown in FIG. 8, the apparatus further includes: a transmitter 23, where the transmitter 23 is configured to send indication information to the remote device. The indication information is used to instruct the remote device to transmit data on all data symbols of the DOI after the specified superframe.
  • processor 21 is further configured to:
  • the first TIGA Before applying the new cancellation coefficient on the partial transmission symbol, initiating a first TIGA, the first TIGA is used to adjust a bit loading table and a gain value of the DOI in the downlink direction; applying the new cancellation coefficient on all transmission symbols Previously, a second TIGA is initiated, which is used to adjust the bit loading table and the gain value of the NOI in the downlink direction.
  • the received signal gain change value included in the second TIGA is greater than or equal to a reciprocal of a received signal gain change value included in the first TIGA and a gain adjustment value of the remote device to the first TIGA feedback. product.
  • the embodiment of the present invention further provides a communication system including a remote device and the line information processing device shown in FIG. 7 or 8.
  • aspects of the present application, or aspects of the application may The manner in which it can be implemented can be embodied as a system, method, or computer program product. Accordingly, aspects of the present application, or possible implementations of various aspects, may be in the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, etc.), or a combination of software and hardware aspects, They are collectively referred to herein as "circuits," “modules,” or “systems.” Furthermore, aspects of the present application, or possible implementations of various aspects, may take the form of a computer program product, which is a computer readable program code stored in a computer readable medium.
  • the computer readable medium can be a computer readable signal medium or a computer readable storage medium.
  • the computer readable storage medium includes, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing, such as random access memory (RAM), read only memory (ROM), Erase programmable read-only memory (EPROM or flash memory), optical fiber, portable read-only memory (CD-ROM).
  • the processor in the computer reads the computer readable program code stored in the computer readable medium such that the processor is capable of performing the various functional steps specified in each step of the flowchart, or a combination of steps; A device that functions as specified in each block, or combination of blocks.
  • the computer readable program code can execute entirely on the user's local computer, partly on the user's local computer, as a separate software package, partly on the user's local computer and partly on the remote computer, or entirely on the remote computer or Executed on the server. It should also be noted that in some alternative implementations, the functions noted in the various steps in the flowcharts or in the blocks in the block diagrams may not occur in the order noted. For example, two steps, or two blocks, shown in succession may be executed substantially concurrently or the blocks may be executed in the reverse order.

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Abstract

Des modes de réalisation de la présente invention concernent un procédé, un dispositif, et un système de traitement d'informations de ligne. Le procédé comprend les étapes suivantes : un appareil proximal calcule de nouveaux coefficients d'annulation, puis applique les nouveaux coefficients d'annulation à une partie de symboles de transmission devant être transmis, et applique des coefficients d'annulation d'origine aux symboles de transmission des symboles de transmission devant être transmis autres que ladite partie, les symboles de transmission comprenant des symboles de données ; et l'appareil proximal acquiert des informations de ligne en temps réel, et surveille les informations de ligne. En résolvant le problème d'instabilité de ligne provoqué par des coefficients d'annulation de diaphonie incorrects résultant d'un échantillon de rétroaction de vectorisation anormal, la présente invention améliore la stabilité d'une ligne.
PCT/CN2016/112188 2016-12-26 2016-12-26 Procédé, dispositif, et système de traitement d'informations de ligne WO2018119603A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014019225A1 (fr) * 2012-08-03 2014-02-06 华为技术有限公司 Dispositif et procédé d'apprentissage de coefficients de vecteur pour une ligne d'abonné numérique vectorielle
WO2014139148A1 (fr) * 2013-03-15 2014-09-18 华为技术有限公司 Procédé et dispositif de terminal pour régler des paramètres d'un dispositif d'envoi et d'un dispositif de réception
WO2015165091A1 (fr) * 2014-04-30 2015-11-05 华为技术有限公司 Procédé, dispositif et système d'annulation de la diaphonie de circuit dans un système dsl
WO2016078999A1 (fr) * 2014-11-17 2016-05-26 Alcatel Lucent Procédé et dispositif de commande de processeur vectoriel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014019225A1 (fr) * 2012-08-03 2014-02-06 华为技术有限公司 Dispositif et procédé d'apprentissage de coefficients de vecteur pour une ligne d'abonné numérique vectorielle
WO2014139148A1 (fr) * 2013-03-15 2014-09-18 华为技术有限公司 Procédé et dispositif de terminal pour régler des paramètres d'un dispositif d'envoi et d'un dispositif de réception
WO2015165091A1 (fr) * 2014-04-30 2015-11-05 华为技术有限公司 Procédé, dispositif et système d'annulation de la diaphonie de circuit dans un système dsl
WO2016078999A1 (fr) * 2014-11-17 2016-05-26 Alcatel Lucent Procédé et dispositif de commande de processeur vectoriel

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