WO2014190539A1 - Procédé de régulation de puissance, appareil émetteur-récepteur, module de contrôle de vectorisation, et système - Google Patents

Procédé de régulation de puissance, appareil émetteur-récepteur, module de contrôle de vectorisation, et système Download PDF

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Publication number
WO2014190539A1
WO2014190539A1 PCT/CN2013/076546 CN2013076546W WO2014190539A1 WO 2014190539 A1 WO2014190539 A1 WO 2014190539A1 CN 2013076546 W CN2013076546 W CN 2013076546W WO 2014190539 A1 WO2014190539 A1 WO 2014190539A1
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WIPO (PCT)
Prior art keywords
power mode
lpm
low power
corresponding line
line
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PCT/CN2013/076546
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English (en)
Chinese (zh)
Inventor
吕捷
周斌
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380000824.2A priority Critical patent/CN105009472B/zh
Priority to PCT/CN2013/076546 priority patent/WO2014190539A1/fr
Publication of WO2014190539A1 publication Critical patent/WO2014190539A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a power control method, a transceiver, a vectorization control entity, and a system.
  • xDSL Digital Subscribe Line
  • G.fast Gigabit DSL
  • crosstalk is very serious.
  • Vectoring technology emerged.
  • each transceiver of the sender acts as a transmitting end, and each transceiver of the receiving side serves as a receiving end, and the transmitting signals of the respective transceivers of the transmitting side are in progress.
  • IFFT Inverse Fast Fourier Transform
  • the pre-coding is performed by a canceller (Precoder).
  • Precoder When the transmitted signal is precoded and IFFT transformed, it can be transmitted.
  • the downlink canceler for crosstalk cancellation is located before the module for transmitting data, so the downlink canceller is also called the downlink precoder, and the downlink cancel matrix is also called the precoding matrix. Therefore, the downlink canceller and the downlink precoder have the same meaning, and the downlink cancellation matrix and the downlink precoding matrix have the same meaning.
  • DMPS Discontinue Mode for Power Saving
  • This technology disables DFE (Digital Front End) processing modules such as IFFT and AFE (Analog Front End) processing modules when there is no service data. Turning off the digital front end or analog front end of some lines is equivalent to zeroing the output signals of the downlink precoding of these lines, or zeroing the input signal of the upstream canceller, thereby achieving low power control.
  • the inverse matrix of the sub-matrix of the active line is calculated according to the index of the active line, and then the corresponding precoding matrix is calculated according to the inverse matrix, and the precoding is performed according to the inverse matrix.
  • the matrix obtains a diagonal matrix, and sends the obtained diagonal matrix to the transceiver, and the transceiver implements the signal transmission according to the diagonal matrix.
  • a matrix with a diagonal of 0 for non-diagonal elements Since it is a diagonal matrix, the inversion is to reciprocate the diagonal elements, and the calculation amount is 4 ⁇ . Then, the power of the transmitted signal is controlled according to the inverse matrix.
  • the first power control method described above needs to invert the sub-matrix, since the symbol rate of G.fast is 48 kHz, each symbol is only 21 microseconds.
  • the feasibility of inverting in a short time is not high; although the second power control method has reduced the calculation of the inversion, in the case of strong crosstalk, the approximate method leads to large errors, resulting in lines.
  • embodiments of the present invention provide a power control method, a transceiver, a vectorization control entity, and a system.
  • the technical solution is as follows:
  • a power control method is provided, which is applied to a vectorization system, where the vectorization system includes a plurality of lines, each of which includes a plurality of subcarriers, and the method includes:
  • restriction information of the low power mode subcarrier corresponding to the line where the restriction information of the low power mode subcarrier of the corresponding line includes information of the low power mode subcarrier set TS-LPM of the corresponding line or a low power mode of the corresponding line Turn off the information of the subcarrier set DTS-LPM;
  • the TS-LPM includes available subcarriers in the low power mode of the corresponding line, and the DTS-LPM includes subcarriers that need to be turned off in the low power mode of the corresponding line, the low power mode.
  • a power-saving mode that turns off the signal or sends a signal on the specified data symbol.
  • the DTS-LPM of the corresponding line is a set of subcarriers in which the signal is disabled in the low-power mode of the corresponding line, and the noise level of other lines is degraded.
  • the closing of the signal in the low power mode of the corresponding line causes the noise level degradation of the other line to refer to the corresponding line.
  • the corresponding normalized precoding matrix element modulus is greater than a preset threshold.
  • the FRLPM is a maximum rate that the corresponding line can reach in a low power mode.
  • the method further includes:
  • the notification vectorization control entity VCE is switched from the full power mode to the low power mode, so that the VCE updates the cancellation matrix according to the restriction information of the low power mode subcarriers of the corresponding line to obtain a first update cancellation matrix;
  • the method further includes: if the FRRPM is smaller than the MRLPM And entering a full power mode, and transmitting data using the TS_FPM, the TS_FPM including available subcarriers of the corresponding line in full power mode.
  • the method further includes: The physical VCE is switched from the low power mode to the full power mode, so that the VCE updates the cancellation matrix according to the full power mode subcarrier set TS_FPM to obtain a second update cancellation matrix; and the receiving the VCE applies the second update cancellation matrix to a second update completion notification sent after the canceller, and after receiving the second update completion notification, entering a full power mode, and transmitting data using the TS_FPM, the TS_FPM including the corresponding line in full power mode Available subcarriers.
  • the entering the low power mode includes:
  • the data symbol transmission signal of the subcarriers in the DTS-LPM is turned off, and the synchronization symbol transmission signal is turned on.
  • the method further includes: Determining whether a trigger condition for updating the restriction information of the low power mode subcarrier of the corresponding line is satisfied;
  • the determining whether the trigger condition for updating the restriction information of the low power mode subcarrier of the corresponding line is satisfied includes: when it is known that a new line joins, the original line leaves, the power state of the line in the system changes, or the channel matrix is updated, it is determined that the trigger condition for updating the restriction information of the low power mode subcarrier of the corresponding line is satisfied.
  • the method further includes:
  • the precoded signal is compensated according to the set of lines that are actually turned off and/or the set of lines that send the data.
  • any one of the first to the tenth possible implementation manners of the first aspect in the twelfth possible implementation manner of the first aspect, the acquiring the corresponding line Limit information for low power mode subcarriers, including:
  • the receiving vectorization control entity VCE sends the corresponding line TS-LPM or DTS- After the LPM information, it also includes:
  • the receiving vectorization control entity VCE sends the corresponding line TS-LPM or DTS- After the LPM information, it also includes:
  • the remote transceiver Receiving updated TS-LPM or DTS-LPM returned by the remote transceiver after updating the TS-LPM or DTS-LPM of the corresponding line according to the suggested information of the TS-LPM or DTS-LPM of the corresponding line After the information is confirmed, the TS-LPM or DTS-LPM of the corresponding line is applied with the remote transceiver at a specified time point.
  • any one of the first to the tenth possible implementation manners of the first aspect in the fifteenth possible implementation manner of the first aspect, the acquiring the corresponding line Limit information for low power mode subcarriers, including:
  • the receiving the TS-LPM or the DTS-LPM of the corresponding line sent by the near-end transceiver also includes:
  • a reply is returned to the near-end transceiver, and after the near-end transceiver acknowledges, the TS-LPM or DTS-LPM of the corresponding line is applied with the near-end transceiver at a specified point in time.
  • any one of the first to the tenth possible implementation manners of the first aspect in the seventeenth possible implementation manner of the first aspect, the acquiring the corresponding line Limit information for low power mode subcarriers, including:
  • the eighteenth possible aspect of the first aspect in an implementation manner, after updating the TS-LPM or the DTS-LPM of the corresponding line according to the information of the TS-LPM or the DTS-LPM of the corresponding line suggested by the near-end transceiver, the method further includes: to the near end Transmitting, by the transceiver, information of the updated TS-LPM or DTS-LPM of the corresponding line, and after the near-end transceiver confirms, applying the TS- of the corresponding line with the near-end transceiver at a specified time point LPM or DTS-LPM.
  • a power control method is provided, which is applied to a vectorization system, where the vectorization system includes a plurality of lines, each of which includes a plurality of subcarriers, and the method includes:
  • restriction information of a low power mode subcarrier of any line where the restriction information of the low power mode subcarrier includes information of a low power mode subcarrier set TS-LPM of the corresponding line or a low power mode closeer of the corresponding line Carrier set DTS-LPM information;
  • the transceiver Transmitting the restriction information of the low power mode subcarriers of the any line to the corresponding transceiver, so that the transceiver calculates the low power mode full rate FRLPM according to the restriction information of the low power mode subcarriers of the corresponding line; a size of the FRRPM and a preset low power mode minimum rate MRLPM; if the FRRPM is greater than or equal to the MRLPM, entering a low power mode, and according to the limitation information of the low power mode subcarrier of the corresponding line from the Selecting the subcarrier transmission data in the TS-LPM of the corresponding line or not using the subcarrier transmission data in the DTS-LPM; wherein the TS-LPM includes the available subcarriers in the low power mode of the corresponding line,
  • the DTS-LPM includes a subcarrier that the corresponding line needs to be turned off in a low power mode, and the low power mode is a power saving mode in which a signal can be turned off or
  • the acquiring the information about the low-power mode sub-carriers of any of the lines includes:
  • a channel matrix H 6q k of the subcarrier k is obtained, and the H 6q k is a
  • M M*M square matrix
  • the subcarrier k is added to the low power mode off subcarrier set DTS_LPM of the line i or the line j, and the information of the DTS-LPM of the any line is used as the Limit information for low power mode subcarriers of any line;
  • the TS-LPM of the any line is obtained according to the DTS_LPM of the any line, and the information of the TS-LPM of the any line is used as the restriction information of the low-power mode sub-carrier of the any line.
  • the adding the subcarrier wave k to the DTS_LPM of the line i or the line j includes:
  • the subcarrier k is added to the line i or the DTS_LPM of the line j according to the priority of the line i and the line j set in advance.
  • the method further includes: receiving the Notification that the transceiver switches from full power mode to low power mode;
  • the method further includes:
  • the power mode is the power mode at which the signal must be transmitted on the specified data symbol.
  • a transceiver for use in a vectoring system, the vectoring system comprising a plurality of lines, each line comprising a plurality of subcarriers, the transceiver comprising:
  • an obtaining module configured to acquire, by using, information about the low-power mode sub-carriers of the corresponding line, where the information about the low-power mode sub-carriers of the corresponding line includes the information of the low-power mode sub-carrier set TS-LPM of the corresponding line or The low power mode of the corresponding line closes the information of the subcarrier set DTS-LPM;
  • a calculation module configured to calculate a low power mode full rate FRLPM according to the restriction information of the low power mode subcarrier of the corresponding line;
  • a comparison module for comparing the FRLPM with a preset low power mode minimum rate The size of the MRLPM
  • a control module configured to enter a low power mode when the FRLPM is greater than or equal to the MRLPM, and select a subcarrier transmission from the TS-LPM of the corresponding line according to the restriction information of the low power mode subcarrier of the corresponding line The data or the subcarrier transmission data in the DTS-LPM is not applied; wherein the TS-LPM includes the available subcarriers of the corresponding line in the low power mode, and the DTS-LPM includes the corresponding line at the low A subcarrier that needs to be turned off in power mode, and the low power mode is a power saving mode in which a signal can be turned off or a signal is transmitted on a designated data symbol.
  • the transceiver further includes:
  • a first notification module configured to notify the vectorization control entity VCE to switch from the full power mode to the low power mode, so that the VCE updates the cancellation matrix according to the restriction information of the low power mode subcarriers of the corresponding line, to obtain the first update offset Matrix
  • a first receiving module configured to receive a first update completion notification sent by the VCE after applying the first update cancellation matrix to the canceller
  • the control module is configured to enter a low power mode after receiving the first update completion notification.
  • the control module is further configured to: when the FRLPM is smaller than the MRLPM, enter a full power mode, and use the TS_FPM to transmit data.
  • the TS_FPM includes available subcarriers of the corresponding line in full power mode.
  • the transceiver further includes:
  • a second notification module configured to notify the VCE to switch from a low power mode to a full power mode, so that the VCE updates the cancellation matrix according to the full power mode subcarrier set TS_FPM to obtain a second update cancellation matrix
  • a second receiving module configured to receive a second update completion notification sent by the VCE after applying the second update cancellation matrix to the canceller
  • the control module is configured to enter a full power mode after receiving the second update completion notification, and transmit data by using the TS_FPM, where the TS_FPM includes available subcarriers of the corresponding line in full power mode.
  • control module is configured to use data of a subcarrier in the DTS-LPM The symbol transmission signal is turned off, and the sync symbol transmission signal is turned on.
  • the transceiver further includes a determining module, configured to determine whether a trigger condition for updating the restriction information of the low power mode subcarrier of the corresponding line is satisfied;
  • an update module configured to: when the trigger condition for updating the restriction information of the low power mode subcarrier of the corresponding line is met, update the restriction information of the low power mode subcarrier of the corresponding line, and/or re-determine the corresponding line Whether you should enter LPM or FPM.
  • the determining module is configured to learn that a new line joins, an original line leaves, and a line in the system When the power state changes or the channel matrix is updated, it is determined that the trigger condition for updating the restriction information of the low power mode subcarrier of the corresponding line is satisfied.
  • the transceiver further includes:
  • a first sending module configured to send, to the canceller, a flag for identifying that the symbol transmission signal is turned off or on, during the transmitting of the signal, so that the canceler obtains the set of lines actually closed on the symbol according to the flag bit and / or a set of lines that send data, and compensate the precoded signal based on the set of lines that are actually turned off and/or the set of lines that sent the data.
  • the transceiver is further The method includes: a monitoring module, configured to monitor service traffic;
  • the control module is further configured to switch from a low power mode to a full power mode when the traffic volume is greater than the low power mode full rate FRLPM.
  • any one of the first to the seventh possible implementation manners of the third aspect in the ninth possible implementation manner of the third aspect, Receiving information of the TS-LPM or DTS-LPM of the corresponding line sent by the VCE, and acquiring restriction information of the low-power mode sub-carrier of the corresponding line according to the information of the TS-LPM or the DTS-LPM.
  • the transceiver further includes:
  • a second sending module configured to send information of the TS-LPM or DTS-LPM of the corresponding line Send to the remote transceiver;
  • a third receiving module configured to receive a reply returned by the remote transceiver
  • the control module is configured to apply, after the acknowledgment, the TS-LPM or the DTS-LPM of the corresponding line with the remote transceiver at a specified time point.
  • the transceiver further includes:
  • a third sending module configured to send information about the recommended TS-LPM or DTS-LPM of the corresponding line to the remote transceiver;
  • a fourth receiving module configured to receive an updated TS returned by the remote transceiver after updating the TS-LPM or DTS-LPM of the corresponding line according to the recommended information of the TS-LPM or the DTS-LPM of the corresponding line -LPM or DTS-LPM information;
  • the control module is configured to apply, after the acknowledgment, the TS-LPM or the DTS-LPM of the corresponding line with the remote transceiver at a specified time point.
  • the acquiring module Information for receiving a TS-LPM or a DTS-LPM of the corresponding line transmitted by the near-end transceiver; acquiring a low-power mode subcarrier of the corresponding line according to information of the TS-LPM or DTS-LPM of the corresponding line Restricted information.
  • the transceiver further includes:
  • a reply module configured to return a reply to the near-end transceiver
  • the control module is configured to apply the TS-LPM or DTS-LPM of the corresponding line to the near-end transceiver at a specified time point after the near-end transceiver performs confirmation.
  • the acquiring module Information for receiving TS-LPM or DTS-LPM of the corresponding line suggested by the near-end transceiver sent by the near-end transceiver; according to the TS-LPM of the corresponding line suggested by the near-end transceiver
  • the information of the DTS-LPM updates the TS-LPM or DTS-LPM of the corresponding line, and acquires the restriction information of the low-power mode sub-carrier of the corresponding line according to the updated TS-LPM or DTS-LPM of the corresponding line.
  • the transceiver further includes: or information of a DTS-LPM;
  • the control module is configured to apply the TS-LPM or DTS-LPM of the corresponding line to the near-end transceiver at a specified time point after the near-end transceiver performs confirmation.
  • a vectorization control entity which is applied to a vectorization system, where the vectorization system includes a plurality of lines, each line includes a plurality of subcarriers, and the vectorization control entity includes: an acquisition module, Restriction information for acquiring a low power mode subcarrier of any line, where the restriction information of the low power mode subcarrier includes information of a low power mode subcarrier set TS-LPM of the corresponding line or a low power mode of a corresponding line Turn off the information of the subcarrier set DTS-LPM;
  • a first sending module configured to send, to the corresponding transceiver, the restriction information of the low power mode subcarriers of the any line, so that the transceiver calculates the low information according to the limitation information of the low power mode subcarriers of the corresponding line a power mode full rate FRRPM; comparing the size of the FRRPM with a preset low power mode minimum rate MRLPM; if the FRRPM is greater than or equal to the MRLPM, entering a low power mode, and according to the low power mode of the corresponding line
  • the carrier restriction information selects subcarrier transmission data from the TS-LPM of the corresponding line or does not apply subcarrier transmission data in the DTS-LPM;
  • the TS-LPM includes available subcarriers in the low power mode of the corresponding line, and the DTS-LPM includes subcarriers that need to be turned off in the low power mode of the corresponding line, the low power mode.
  • a power-saving mode that turns off the signal or sends a signal on the specified data symbol.
  • the acquiring module includes:
  • a first obtaining unit configured to acquire, for each subcarrier k, a channel matrix H of the subcarrier k, where H ⁇ k is a matrix of M*M, and M is a line that has been added and will join the vectorization system total;
  • a second obtaining unit configured to obtain a precoding matrix P k according to the calculation, and obtain a sub-matrix p indexed by d in the precoding matrix p k ;
  • a third obtaining unit configured to obtain, according to the P, a normalized matrix whose diagonal is all ones; and a determining unit, configured to determine whether a modulus value of the non-diagonal element or a modulus value of the ⁇ . Greater than a preset threshold;
  • the subcarrier k is added to the low power mode off subcarrier set DTS_LPM of line i or line j;
  • a determining unit configured to use the information of the DTS-LPM of the any line as the restriction information of the low power mode subcarrier of the any line; or obtain the line of the any line according to the DTS_LPM of the any line.
  • the TS-LPM, and the information of the TS-LPM of any of the lines is used as the restriction information of the low power mode subcarriers of the any line.
  • the acquiring module includes:
  • the adding unit is configured to add the subcarrier k to the line i or the DTS_LPM of the line j according to the priority of the line i and the line j set in advance.
  • the vectoring control entity further includes:
  • a first receiving module configured to receive a notification that the transceiver is switched from a full power mode to a low power mode
  • a first update module configured to update the cancellation matrix according to the information of the low power mode subcarriers of the any line, to obtain a first update cancellation matrix
  • a first application module configured to apply the first update cancellation matrix to the canceller
  • a second sending module configured to send a first update completion notification to the transceiver, to enable the transceiver to enter the low power mode after receiving the first update completion notification.
  • the vectoring control entity further includes:
  • a second receiving module configured to receive a notification that the transceiver switches from a low power mode to a full power mode
  • a second update module configured to update a cancellation matrix according to the full power mode subcarrier set TS-FPM of the any line, to obtain a second update cancellation matrix
  • a second application module configured to apply the second update cancellation matrix to the canceller
  • a third sending module configured to send a second update completion notification to the transceiver, after the transceiver receives the second update completion notification, enter a full power mode, where the full power mode is in the specified The power mode of the signal must be sent on the data symbol.
  • a power control system comprising: a transceiver and a vectorization control entity;
  • the transceiver of any one of the possible implementations of the fifteenth possible implementation manner of the third aspect to the third aspect;
  • the vectoring control entity is a vectorization control entity as described in any of the possible implementations of the fourth aspect to the fourth aspect of the fourth aspect.
  • FIG. 1 is a vectorization system according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a power control method according to Embodiment 1 of the present invention.
  • FIG. 3 is a flowchart of another power control method according to Embodiment 1 of the present invention.
  • FIG. 4 is a flowchart of a power control method according to Embodiment 2 of the present invention.
  • FIG. 5 is a flowchart of a power control method according to Embodiment 3 of the present invention.
  • FIG. 6 is a schematic structural diagram of a first transceiver according to Embodiment 4 of the present invention.
  • FIG. 7 is a schematic structural diagram of a second transceiver according to Embodiment 4 of the present invention.
  • FIG. 8 is a schematic structural diagram of a third transceiver according to Embodiment 4 of the present invention.
  • FIG. 9 is a schematic structural diagram of a fourth transceiver according to Embodiment 4 of the present invention.
  • FIG. 10 is a schematic structural diagram of a fifth transceiver according to Embodiment 4 of the present invention.
  • FIG. 11 is a schematic structural diagram of a sixth transceiver according to Embodiment 4 of the present invention.
  • FIG. 12 is a schematic structural diagram of a seventh transceiver according to Embodiment 4 of the present invention.
  • FIG. 13 is a schematic structural diagram of an eighth transceiver according to Embodiment 4 of the present invention.
  • FIG. 14 is a schematic structural diagram of a ninth transceiver according to Embodiment 4 of the present invention
  • FIG. 15 is a schematic structural diagram of a tenth transceiver according to Embodiment 4 of the present invention
  • FIG. 16 is a schematic structural diagram of a first vectorization control entity according to Embodiment 5 of the present invention
  • FIG. 18 is a schematic structural diagram of a second vectorization control entity according to Embodiment 5 of the present invention
  • FIG. 19 is a schematic structural diagram of a third vectorization control entity according to Embodiment 5 of the present invention.
  • a schematic diagram of the structure of a power control system is provided. detailed description
  • the embodiment of the present invention provides a power control method, which is applied to a vectorization system, where the vectorization system includes multiple lines, each of which includes multiple subcarriers, and implements the embodiment provided by the embodiment.
  • the method process provided by this embodiment includes:
  • restriction information of a low-power mode sub-carrier corresponding to the line where the restriction information of the low-power mode sub-carrier of the corresponding line includes information of a TS-LPM (Tone Set for Low Power Mode) of the corresponding line Or the information of the DTS-LPM (Disabled Tone Set for Low Power Mode) of the corresponding line;
  • the TS-LPM includes the available subcarriers in the low power mode of the corresponding line, the DTS-LPM includes the subcarriers that need to be turned off in the low power mode, and the low power mode is the detachable signal on the specified data symbols. Or the energy saving mode of the signal.
  • the method provided in this embodiment is implemented by using a VCE (Vector Control Entity).
  • VCE Vector Control Entity
  • the method process provided by this embodiment includes:
  • the restriction information includes information of the TS-LPM of the corresponding line or information of the DTS-LPM of the corresponding line; 302: transmitting the restriction information of the low power mode subcarrier of any line to the corresponding transceiver, so that the transceiver according to the corresponding line
  • the low-power mode subcarrier limitation information calculation FRRPM compares the FRRPM with the preset MRLPM size; if the FRRPM is greater than or equal to the MRLPM, enters the low power mode, and according to the restriction information of the low power mode subcarrier of the corresponding line from the corresponding line
  • the subcarrier transmission data is selected or the subcarrier transmission data in the DTS-LPM is not applied; wherein, the TS-LPM includes the available subcarriers of the corresponding line in the low power mode, and the corresponding line is included in the DTS-LPM.
  • the method provided in this embodiment after obtaining the restriction information of the low power mode subcarrier of the corresponding line of the information including the TS-LPM of the corresponding line or the information of the DTS-LPM by the transceiver, according to the low power mode subcarrier of the corresponding line
  • the restriction information calculates the FRRPM and enters the low power mode after comparing the FRRPM with the MRLPM, and selects the subcarrier transmission data from the TS-LPM according to the restriction information of the low power mode subcarrier of the corresponding line or does not apply in the DTS-LPM.
  • the subcarrier transmits data, so as to avoid the sudden closing of the LPM line part of the symbol, which causes offset errors and avoids the stability degradation of other lines.
  • x' k P k .x k ( 1 )
  • y k Feq k .(H k .P k .x k + ) ( 2 )
  • P k identifies the matrix of the k-th subcarrier, and the size is M* M;
  • H k identifies a channel matrix corresponding to the kth subcarrier, and has a size of M*M;
  • Feq k identifies the FEQ (Frequency Equalizer) matrix of the kth subcarrier, the size is M*M, and Feq k is a diagonal matrix; its function is to restore the received signal to the transmitted signal, and the downlink FEQ is on the receiving side.
  • FEQ Frequency Equalizer
  • x k identifies the sender of the M sender transceivers on the kth subcarrier before passing through the canceller Number, size is M*l;
  • x k identifies the transmission signal of the M sender transceivers after passing through the canceller on the kth subcarrier, the size is M*l;
  • y k identifies the received signal of the M receiver transceivers on the kth subcarrier, the size is M*l; identifies the noise signal of the M receiver transceivers on the kth subcarrier, the size is M*l.
  • H k identifies a channel matrix corresponding to the kth uplink subcarrier, and has a size of M*M;
  • Feq k identifies the FEQ (Frequency Equalizer) matrix of the kth subcarrier, the size is M*M, and Feq k is a diagonal matrix; its function is to restore the received signal to the transmitted signal, and the uplink FEQ is on the receiving side.
  • FEQ Frequency Equalizer
  • ⁇ identifies the received signal of the M receiver transceivers on the kth subcarrier, the size is M*l; ⁇ identifies the received signal of the M receiver transceivers after passing the canceller on the kth subcarrier, the size is M *l;
  • the transmission data transmission unit is a symbol, a time division multiplexing frame, or a super frame.
  • the length of each time division multiplexing frame is 36 symbols, and 35 of them are data symbols, and in each time division multiplexing frame, the previous part transmits the downlink signal, and the latter part sends the uplink signal, and the other part is The gap sent by the upstream and downstream does not send a signal.
  • a superframe has a length of 288 symbols, of which 280 are data symbols, and among 280 data symbols, there is one uplink synchronization symbol and one downlink synchronization symbol, and the remaining 278 Symbols are data symbols for transmitting data.
  • the method provided by the embodiment of the present invention can limit the size of each element of the cancellation matrix, thereby avoiding the amplification of the noise at the receiving end by the canceller. Therefore, the avoidance of the performance loss of the uplink also has a significant effect.
  • the method process provided by this embodiment includes: 401: The VCE acquires restriction information of a low power mode subcarrier of any line, where the restriction information of the low power mode subcarrier includes information of a TS-LPM of the corresponding line or information of a DTS-LPM of the corresponding line;
  • the LPM is in a low power mode
  • the low power mode is a power saving mode in which a signal can be turned off or transmitted on a specified data symbol, which can correspond to a low power state L2.0, L2.1 in G.fast. Any of the L2 states, such as L2.2.
  • the full power mode is the power mode in which the signal must be transmitted on the specified data symbol.
  • the subcarriers used in full power mode are not constrained by the limited information of the low power mode subcarriers. Since the TS-LPM includes available subcarriers for any of the lines in the low power mode, this embodiment uses the DTS-LPM as a set of subcarriers that are turned off in the low power mode.
  • the DTS-LPM of the corresponding line is a set of subcarriers that cause the noise level of other lines to deteriorate due to the off signal in the line low power mode.
  • the corresponding line is turned off in the low power mode, and the noise level degradation of the other lines means that the corresponding normalized precoding matrix element modulus of the corresponding line is greater than the preset threshold.
  • the VCE can estimate the sub-carrier set that causes the stability of other lines to decrease in the low-power mode by analyzing the precoding matrix/offset matrix of each sub-carrier, that is, Obtaining the DTS-LPM, using the information of the DTS-LPM as the restriction information of the low power mode subcarrier of the line, or determining the TS-LPM of any line according to the DTS-LPM, and using the information of the TS-LPM as the line Limit information for low power mode subcarriers.
  • step 401 can be implemented by the following steps:
  • Step 1 For each subcarrier k, obtain the channel matrix H of the subcarrier k, which is a square matrix of M*M, where M is the total number of lines that have joined and are about to join the vectorization system;
  • the manner of obtaining the channel matrix of the subcarrier k can be implemented according to the existing acquisition manner, and taking the channel matrix corresponding to the kth subcarrier as an example, the sender firstly synchronizes the synchronization symbol of the kth subcarrier.
  • the receiving side sends the orthogonal pilot sequence, and obtains the error sample value returned by the receiver according to the orthogonal pilot sequence, and then the VCE can estimate the corresponding corresponding to the kth subcarrier according to the orthogonal pilot sequence and the error sample value.
  • the diagonal element values are all 1.
  • Step 2 The H e. k calculates the precoding matrix P k , and obtains the submatrix P indexed by d in the precoding matrix P k ;
  • the precoding matrix P k is obtained according to H ra k , it can be realized by matrix inversion, that is, the precoding matrix P k is an inverse matrix.
  • the calculation process can be based on existing
  • the pre-coding matrix is implemented in a manner that is not specifically limited in this embodiment.
  • P is a precoding matrix between low power mode lines, and is a square matrix of size nd*nd.
  • a submatrix with d as an index can be obtained in the p k matrix.
  • the submatrix P is obtained. Where d is any of all the lines in the vectorization system.
  • Step 3 Obtain a normalized matrix with a diagonal of all 1 according to P;
  • dd is a diagonal matrix and is the diagonal matrix of P.
  • the method is only one method for obtaining a diagonal normalization matrix.
  • the other methods for normalizing the precoding matrix can also be used in this embodiment. This embodiment does not specifically limit this.
  • Step 4 Determine whether the modulus value of the non-diagonal element or the modulus value of . is greater than the preset threshold
  • the size of the preset threshold is not specifically limited in this embodiment. For example, if the value is 0.2, the modulus value of the non-diagonal element or the modulus of the value is greater than 0.2. If it is greater than, Go to step 5. Otherwise, subcarrier k is considered to be a usable subcarrier.
  • Step 5 If the modulus value of ⁇ or the modulus value of ⁇ in the non-diagonal element is greater than the preset threshold, add subcarrier k to line D or DTS_LPM of line j;
  • the subcarrier k needs to be added to the DTS_LPM of one of the two lines of di, dj, that is, only one of the lines of di, dj and the signal of the subcarrier k is set to 0.
  • the priority setting method can also adopt the following three modes:
  • Showtime Line Priority Mode Sets the priority of the activated line to be higher than the priority of the newly added line. This mode ensures that the transmission rate of the activated line fluctuates less.
  • Subcarrier Alternate Mode Different priorities are set for the same line on different subcarriers. Taking the line with the symbol ml and the line with the symbol m2 as an example, the priority of the ml line can be set higher than the priority of the m2 line on the odd subcarriers, and the priority of the ml line is given on the even subcarriers. The level is set to be lower than the priority of the m2 line. This mode allows the performance of all lines to be balanced, thus avoiding excessive fluctuations in the performance of some lines.
  • User setting mode The operator can set the priority of the line corresponding to the user with high data transmission rate to high according to the user's business requirements.
  • Step 6 Use the DTS-LPM information of any line as the restriction information of the low power mode subcarrier of any line, or obtain the TS-LPM of any line according to the DTS_LPM of any line, and the TS-LPM The information is used as restriction information for the low power mode subcarriers of any of the lines.
  • LPM which can obtain DTS_LPM of all lines, and can directly use the DTS-LPM information of any line as the restriction information of the low power mode subcarrier of any line.
  • the TS-FPM of each line or the initial TS-LPM can be removed from the DTS_LPM to obtain the TS-LPM of any line, and the information of the TS-LPM is used as the low-power mode subcarrier of any of the lines. Restricted information.
  • the VCE sends the restriction information of the low power mode subcarrier of any line to the corresponding transceiver.
  • the VCE when the VCE sends the restriction information of the low power mode subcarrier of any line to the corresponding transceiver, if the restriction information of the low power mode subcarrier of any line acquired by the VCE is DTS-LPM information, Then, the VCE sends the information of the DTS-LPM to the corresponding transceiver; if the restriction information of the low-power mode sub-carrier of any line acquired by the VCE is the information of the TS-LPM, the VCE sends the information of the TS-LPM to the corresponding Transceiver.
  • the DTS-LPM subcarrier is not used to transmit data, that is, on the closed subcarrier DTS_LPM
  • the FTU sends a signal on the data symbol (data symbol) to 0, and for the downlink, That is, the signal ⁇ - ' ⁇ before entering the precoder or canceller, where the symbol u indicates entering the precoding/canceller
  • the partially specified sync symbol should keep the transmit signal not 0 to ensure that the training of FEQ and channel H can proceed normally, so that these closed subcarriers (subcarriers whose data symbol is zeroed) It can be re-enabled in the future.
  • the manner in which this embodiment is not re-enabled is not described herein again.
  • the foregoing process uses the precoding matrix processing as an example to describe the TS-LPM-di (or DTS-LPM) application process in the downlink direction.
  • the processing flow is the same, and the object of processing is the cancellation matrix, not the precoding matrix.
  • the transceiver acquires restriction information of a low power mode subcarrier corresponding to the line;
  • the manner in which the transceiver acquires the restriction information of the low power mode subcarrier corresponding to the line is not limited to the following three modes:
  • Manner 1 Receive information of the TS-LPM or DTS-LPM of the corresponding line sent by the VCE, and obtain the restriction information of the low-power mode sub-carrier of the corresponding line according to the information of the TS-LPM or the DTS-LPM.
  • the transceiver is a near-end transceiver, and information of the TS-LPM or the DTS-LPM can be obtained directly from the VCE side. If the DTS-LPM information is obtained, the TS-FPM or the initial TS-LPM can be removed from the DTS_LPM to obtain the TS-LPM of any line.
  • the transceiver is a near-end transceiver, in order for the remote transceiver to acquire the TS-LPM, the transceiver may further include a TS-LPM or a DTS-LPM corresponding to the line after acquiring the TS-LPM.
  • the information is sent to the remote transceiver, and after receiving the reply returned by the remote transceiver and confirming, the remote transceiver is applied with the TS-LPM or DTS-LPM of the corresponding line at the specified time.
  • the transceiver may also send information of the TS-LPM or DTS-LPM of the suggested corresponding line to the remote transceiver; and receive the remote transceiver according to the suggested corresponding line TS-LPM or DTS- After updating the TS-LPM or DTS-LPM information returned by the TS-LPM or DTS-LPM of the corresponding line, and confirming, the LPM applies the TS-LPM or DTS of the corresponding line with the remote transceiver at the specified time point. -LPM.
  • Manner 2 Receiving the TS-LPM or DTS-LPM letter of the corresponding line sent by the near-end transceiver And obtaining the restriction information of the low power mode subcarriers of the corresponding line according to the information of the TS-LPM or the DTS-LPM of the corresponding line.
  • the transceiver is a remote transceiver.
  • the near-end transceiver directly obtains the information of the TS-LPM or the DTS-LPM from the VCE side
  • the TS-LPM or DTS-LPM obtained by the near-end transceiver is obtained.
  • the information is sent to the remote transceiver, so that the transceiver receives the TS-LPM or DTS-LPM information of the corresponding line sent by the near-end transceiver; and acquires the corresponding line according to the information of the TS-LPM or DTS-LPM of the corresponding line.
  • Limit information for low power mode subcarriers are examples of the TS-LPM or DTS-LPM from the VCE side
  • the DTS-LPM can be determined according to the information of the DTS-LPM, and then the TS-FPM or the initial TS-LPM is removed from the DTS_LPM, and any line can be obtained. TS-LPM.
  • the transceiver may also return a reply to the near-end transceiver, and after the near-end transceiver confirms, apply the corresponding line with the near-end transceiver at the specified time point.
  • TS-LPM or DTS-LPM.
  • Manner 3 receiving information of the TS-LPM or DTS-LPM of the corresponding line suggested by the near-end transceiver sent by the near-end transceiver; updating the information according to the information of the TS-LPM or DTS-LPM of the corresponding line suggested by the near-end transceiver
  • the TS-LPM or DTS-LPM of the line acquires the restriction information of the low power mode subcarriers of the corresponding line according to the updated TS-LPM or DTS-LPM of the corresponding line.
  • the transceiver is also a remote transceiver, but after the near-end transceiver obtains the information of the TS-LPM or the DTS-LPM from the VCE side, the obtained TS-LPM or DTS-LPM information is not directly obtained.
  • the near-end transceiver Sent to the transceiver, but the near-end transceiver sends the TS-LPM or DTS-LPM information of the corresponding line suggested by the near-end transceiver to the transceiver, so that the near-end transceiver that receives the near-end transceiver transmits Suggested information of the TS-LPM or DTS-LPM of the corresponding line; update the TS-LPM or DTS-LPM of the corresponding line according to the information of the TS-LPM or DTS-LPM of the corresponding line suggested by the near-end transceiver, and according to the updated The TS-LPM or DTS-LPM of the corresponding line determines the restriction information of the low power mode subcarriers of the corresponding line.
  • the transceiver After obtaining the information of the TS-LPM or the DTS-LPM from the remote transceiver, the transceiver sends the updated TS-LPM or DTS-LPM information of the corresponding line to the near-end transceiver, and is at the near end. After the transceiver confirms, the TS-LPM or DTS-LPM of the corresponding line is applied to the near-end transceiver at the specified time point.
  • Mode 1 includes the closed subcarrier index
  • the interface is shown in Table 1:
  • the information of TS-LPM or DTS-LPM includes the power gain factor of all subcarriers. If the power gain factor is 0, it indicates that the subcarrier is located in the DTS-LPM set and should be closed. If the power gain factor is not 0, it indicates that the subcarrier is located in the TS-LPM set, and the data can be sent normally, as shown in Table 2:
  • each power gain factor should also include the corresponding subcarrier number.
  • TS-LPM or DTS-LPM includes the power gain factor and the number of bit bearers, as shown in Table 3:
  • the subcarrier number is not required in the message.
  • each power gain factor and number of bit bearers should also include the corresponding subcarrier sequence number.
  • the transceiver obtains the restriction information of the low-power mode sub-carrier of the corresponding line, according to which the TS-LPM or the DTS-LPM of the corresponding line can be further determined
  • the TS- The subcarrier transmission data is selected in the LPM or the subcarrier transmission data in the DTS-LPM is not applied. Since the DTS-LPM is a subcarrier set corresponding to the noise level degradation of other lines caused by the off signal in the line low power mode, the subcarrier transmission data in the DTS-LPM is not applied or the subcarrier transmission data is selected from the TS-LPM. Reduce interference to other lines and avoid the stability of other lines.
  • the manner of triggering the transceiver to enter the low power mode or enter the full power mode may be specifically See the steps below.
  • the transceiver calculates the FRRPM according to the restriction information of the low power mode subcarrier of the corresponding line; for this step, the FRLPM is the maximum rate that the corresponding line can reach in the low power mode.
  • This embodiment does not limit the manner in which the transceiver calculates the FRRPM according to the restriction information of the low power mode subcarriers of the corresponding line, including but not limited to: according to the TS-LPM of the corresponding line, according to the formula -owrfeoi
  • the restriction information of the low power mode subcarrier of the corresponding line may directly include the information of the TS-LPM of the corresponding line
  • the TS-LPM of the corresponding line may be directly determined according to the information of the TS-LPM.
  • the restriction information of the low power mode subcarrier of the corresponding line includes the information of the DTS-LPM of the corresponding line
  • the information of the TS-LPM may be derived according to the information of the DTS-LPM, thereby determining the TS-LPM of the corresponding line, and according to The above formula calculates the FRRPM.
  • ⁇ is the symbol rate
  • n is the number of downlink or uplink data symbols in each superframe
  • k is the total number of bits carried by one symbol
  • Bi k is the number of bits carried by the kth subcarrier
  • overhead is the overhead rate.
  • n is the number of downlink (or up and down) symbols that can be sent in a superframe. Since the FTU can turn off the signal as required in the low-power mode, the actual number of transmitted symbols can be less than n. The specific number can be determined according to the traffic flow. , so FRLPM is the maximum rate that this mode can achieve.
  • the transceiver compares the size of the FRLPM with the preset MRLPM; if the FRLPM is greater than or equal to the MRLPM, step 406 is performed, if the FRLPM is less than the MRLPM, step 407 is performed;
  • the subsequent transceivers use fewer subcarriers when transmitting data using the TS-LPM, so performance may be affected and may not reach the target. performance.
  • an MRLPM needs to be set. This rate can also be called TRDM (Target Rate for Dicontinous Mode).
  • TRDM Target Rate for Dicontinous Mode
  • the operation of setting up the MRLPM can be implemented by the VCE, which is then sent by the VCE to the transceiver. For example, it is delivered to the transceiver through the Q interface, and can also be stored in the MIB (Management Information Base).
  • the transceiver When the transceiver subsequently uses TS-LPM to transmit data, it can reach MRLPM at most, then enter LPM mode, otherwise, use FPM. Therefore, in order to be clear In the mode, the transceiver needs to compare the size of the FRRPM with the preset MRLPM. If the FRRPM is greater than or equal to the MRLPM, step 406 is performed. If the FRRPM 'J is in the MRLPM, step 407 is performed.
  • the transceiver can enter the low power mode in order to save resources.
  • the transceiver Before entering low power mode, if the transceiver is already in low power mode, it will stay in low power mode if the transceiver is in full power mode before entering low power mode, when the transceiver is switched from FPM to LPM, The set of subcarriers used changes, the channel matrix H changes, and P also needs to change. Therefore, when the transceiver performs power mode switching, the VCE also needs to cooperate with the switching of the cancellation matrix to update the precoding matrix or the cancellation matrix.
  • Step 1 The VCE calculates the precoding matrix P or the cancellation matrix W according to the unclosed subcarrier (TS-FPM), and applies the same to Precoder or canceller. Since the precoding matrix P or the cancellation matrix W is updated, the VCE is followed by the TS-LPM (or DTS-LPM) according to the updated precoding matrix P or the cancellation matrix, and the TS-LPM (or DTS-LPM) is issued. Give FTU.
  • TS-FPM unclosed subcarrier
  • Step 2 Since the transceiver is in full power mode before entering the low power mode, the transceiver initially uses the TS-FPM training parameters, which requires data to be sent in all data symbols.
  • Step 3 After training the parameters, the transceiver calculates the FRLPM based on TS-LPM (or DTS-LPM). Determine if the FRLPM is less than MRLPM, then stay in the FPM state. Otherwise, you need to switch to the LPM state. For the process of switching to the LPM state, see steps 4-6.
  • Step 4 The FTU uses TS-LPM on the data symbol. (That is, the signal of the non-TS-LPM subcarrier is set to 0, and the signal with zero is the signal before entering the precoder). However, at this time, the data is not sent discontinuously and needs to be sent in all data symbols.
  • Step 5 The FTU notifies the VCE to switch from the full power mode to the low power mode.
  • the VCE updates the precoding matrix or the cancellation matrix according to the restriction information of the low power mode subcarriers of the corresponding line, and applies to the precoder or the quadrature canceller.
  • the embodiment does not limit the method for the VCE to update the precoding matrix or the cancellation matrix according to the restriction information of the low power mode subcarriers of the corresponding line.
  • the embodiment does not limit the method for the VCE to update the precoding matrix or the cancellation matrix according to the restriction information of the low power mode subcarriers of the corresponding line.
  • the content of the patent document of PCT/CN2013/075148 is not described herein again.
  • Step 6 After the VCE updates the precoding matrix or the cancellation matrix, it notifies the transceiver that the update is complete, and sends a first update completion notification to the transceiver. At this point, the mode switch ends, the transceiver can enter the LPM state, and the data can be transmitted using TS-LPM, and the signal can be turned off at any data symbol to save power.
  • the line of the LPM mode can be sent off at any data symbol, and the ratio of how to close and close can be determined according to the data traffic (traffic).
  • the method provided in this embodiment further includes a signal compensation manner, and the specific compensation manner may be multiple. Not limited to: during the signal transmission, a flag for identifying whether the symbol transmission signal is turned off or on is sent to the canceller, so that the canceler obtains the line set actually closed on the symbol and the line set of the transmitted data according to the flag bit, and is closed according to the actual The set of lines and the set of lines that send the data compensate for the precoded signal.
  • the precoding/canceller obtains the set d of the actually closed lines on the symbol according to the flag bit (note that this is the set of lines that are actually closed, not the set of LPM lines) and the set of lines a that send data.
  • Another implementation method is that the transceiver does not send the identifier, and the closed line does not send any signal to the precoding/canceller, so that the precoding/canceller can judge whether the FTU is on or off according to whether the transceiver link has a signal. , to obtain the set d of the closed line and the line set a of the transmitted data.
  • the precoded signal can be compensated by existing methods.
  • the specific compensation method can be implemented by the following formula:
  • the content, specific principles and implementation methods of the patent document with the application number 201210302733. 1 can also be referred to, and the present invention is not described in detail.
  • the state switching may be one line in the Vector system, or may be multiple lines. If multiple lines need to be switched, each FTU interacts with the VCE during the interaction between the FTU and the VCE. In addition to the lines that need to be switched, the status of the other lines can remain unchanged, and the VCE updates the coefficients according to the original status.
  • the method provided by the embodiment includes: monitoring service traffic after the line enters the LPM mode, and switching from the low power mode to the full when the service traffic is greater than the low power mode full rate FRPPM Power mode.
  • the service traffic may be implemented in the transceiver, or the service traffic monitoring module may be set outside the transceiver, and the transceiver switches from the LPM state to the FPM state according to the service traffic monitored by the module.
  • the transceiver switches from the LPM state to the FPM state according to the service traffic monitored by the module.
  • Step 406 Steps 1 to 6 are not described here.
  • the data in the cache may also be monitored by the transceiver.
  • the transceiver may also trigger the LPM state. Switch to the FPM state.
  • TS_FPM includes available subcarriers of the corresponding line in full power mode.
  • the transceiver can enter the full power mode in order to ensure data transmission performance. Before entering full power mode, if the transceiver is already in full power mode, it can stay in full power mode. If the transceiver is in low power mode before entering full power mode, when the transceiver is switched from LPM to FPM, The set of subcarriers used changes, the channel matrix H changes, and P also needs to change. Therefore, when the transceiver performs power mode switching, the VCE also needs to cooperate with the switching of the cancellation matrix to update the precoding matrix or the cancellation matrix.
  • Step 1 The VCE calculates the precoding matrix P or the cancellation matrix W according to the subcarrier complete set (TS-FPM), but does not apply the same. Go to the precoder or canceller. Then TS-LPM (or DTS-LPM) is obtained according to P/W, and TS-LPM (or DTS-LPM) is sent to FTU.
  • TS-LPM subcarrier complete set
  • Step 2 The VCE calculates the precoding matrix P or the cancellation matrix W according to the TS-LPM subcarrier set, and applies the precoding matrix P or the cancellation matrix W corresponding to the TS-LPM to the precoder or the canceller.
  • the method for calculating the precoding matrix or the cancellation matrix is not limited in this embodiment.
  • the content of the patent document with the application number of PCT/CN2013/075148 can be specifically referred to, and the details are not described herein again.
  • Step 3 Since the transceiver is in low power mode before entering full power mode, the FTU initially uses the TS-LPM subcarrier set training parameters and calculates the maximum rate FRRPM 0 under the current parameters.
  • Step 4 After training the parameters, the FTU judges that if the FRRPM is greater than or equal to the MRLPM, it stays in the LPM state according to the current rate FRRPM. Otherwise, you need to switch to the FPM state. For the process of switching to the FPM state, see steps 5-8.
  • Step 5 The FTU notifies the VCE to switch from the LPM to the FPM.
  • Step 6 The VCE updates the precoding matrix or the 4th cancellation matrix according to the corresponding TS-FPM and applies it to the precoder or canceller.
  • this embodiment does not limit the method for the VCE to update the precoding matrix or the cancellation matrix according to the corresponding TS-FPM.
  • the content of the patent document with the application number of PCT/CN2013/075148 can be referred to, and the details are not described herein again.
  • Step 7 After the VCE updates the precoding matrix or the cancellation matrix, it notifies the transceiver that the update is complete, and sends a second update completion notification to the transceiver. At this point, the mode switch ends, the transceiver can enter the FPM state, and the data is transmitted using TS-FPM to ensure data transmission performance.
  • Step 8 The FTU uses the TS-FPM subcarrier set (ie, re-enables the DTS-LPM subcarrier set that was previously turned off) to achieve a higher rate. Subsequently, the FTU needs to send data on all data symbols, and does not allow the symbol to be turned off.
  • the state switching is required to be one line in the Vector system, or multiple lines. If multiple lines need to be switched, each FTU interacts with the VCE during the interaction between the FTU and the VCE. In addition to the lines that need to switch states, the status of other lines can remain unchanged, and the VCE updates the coefficients according to the original status.
  • the method provided in this embodiment determines the restriction information of the low power mode subcarriers of the corresponding line according to the foregoing process
  • the method provided in this embodiment further includes the low power mode subcarriers of the corresponding line.
  • the method of updating the restriction information of the low-power mode sub-carriers of the corresponding line, and/or re-determining whether the corresponding line should enter the LPM or the FPM may refer to the related content of the foregoing steps 401 to 407 provided in this embodiment. This example does not specifically limit this.
  • determining whether the trigger condition for updating the restriction information of the low power mode subcarrier of the corresponding line is met including but not limited to: when it is learned that a new line joins, the original line leaves, the power state of the line in the system changes or the channel When the matrix is updated, it is judged that the trigger condition for updating the restriction information of the low power mode subcarrier of the corresponding line is satisfied.
  • the method provided in this embodiment after obtaining the restriction information of the low power mode subcarrier of the corresponding line of the information including the TS-LPM of the corresponding line or the information of the DTS-LPM by the transceiver, according to the low power mode subcarrier of the corresponding line
  • the restriction information calculates the FRRPM and enters the low power mode after comparing the FRRPM with the MRLPM, and selects the subcarrier transmission data from the TS-LPM according to the restriction information of the low power mode subcarrier of the corresponding line or does not apply in the DTS-LPM.
  • the subcarrier transmits data, so as to avoid the sudden closing of the LPM line part of the symbol, which causes offset errors and avoids the stability degradation of other lines.
  • the LPM state can be entered according to the comparison result, so that the solution is very flexible, and can be automatically adapted according to the target rate to meet different application scenarios.
  • This embodiment provides a power control method, which is combined with the structure shown in FIG. 1 and refers to the content of the first embodiment and the second embodiment. Referring to FIG. 5, the process of the method provided in this embodiment is as follows:
  • the transceiver acquires restriction information of a low power mode subcarrier corresponding to the line, where the restriction information of the low power mode subcarrier includes information of a TS-LPM of the corresponding line or information of a DTS-LPM of the corresponding line;
  • this embodiment does not limit the manner in which the transceiver acquires the restriction information of the low power mode subcarriers of the corresponding line.
  • the transceiver acquires the restriction information of the low power mode subcarriers of the corresponding line.
  • the manner described in step 403 in the second embodiment above refer to the manner described in step 403 in the second embodiment above.
  • the VCE involved in the step 403 in the foregoing embodiment 2 obtains the restriction information of the low-power mode sub-carriers of the corresponding line, refer to the related descriptions of the steps 401 and 402 in the second embodiment, and the description is not repeated here. .
  • the transceiver calculates the FRRPM according to the restriction information of the low power mode subcarriers of the corresponding line.
  • the embodiment does not limit the manner in which the transceiver calculates the FRRPM according to the restriction information of the low power mode subcarriers of the corresponding line in the step. .
  • step 404 refers to the related description of step 404 in the foregoing embodiment 2, and details are not described herein again.
  • the transceiver compares the size of the FRLPM with the preset MRLPM; if the FRLPM is greater than or equal to the MRLPM, step 504 is performed, if the FRLPM is less than the MRLPM, step 505 is performed;
  • this embodiment also does not limit the manner in which the transceiver compares the size of the FRRPM with the preset MRLPM in the step. For example, refer to step 405 in the foregoing second embodiment. The related description is not repeated here.
  • the transceiver does not enter the low power mode in the step, and the subcarrier transmission data is selected from the TS-LPM of the corresponding line according to the restriction information of the low power mode subcarrier of the corresponding line or not applied in the DTS-LPM.
  • the manner in which subcarriers transmit data is limited. For example, reference may be made to the related description of step 406 in the second embodiment above, and is not described here again.
  • TS_FPM includes available subcarriers of the corresponding line in full power mode.
  • the transceiver does not enter the full power mode in this step, and the TS-FPM is used to transmit data.
  • the TS-FPM is used to transmit data.
  • the restriction information calculates the FRRPM and enters the low power mode after comparing the FRRPM with the MRLPM, and selects the subcarrier transmission data from the TS-LPM according to the restriction information of the low power mode subcarrier of the corresponding line or does not apply in the DTS-LPM.
  • the subcarrier transmits data, so as to avoid the sudden closing of the LPM line part of the symbol, which causes offset errors and avoids the stability degradation of other lines.
  • the LPM state can be entered according to the comparison result, so that the solution is very flexible and can be automatically adapted according to the target rate to meet different application scenarios.
  • the embodiment of the present invention provides a transceiver for performing the functions performed by the transceiver in the method provided in Embodiment 1 or Embodiment 2 or Embodiment 3, where the transceiver is applied in a vectorization system, and the vectorization system is implemented. It includes multiple lines, each of which includes multiple subcarriers. See Figure 6.
  • the transceiver includes:
  • the obtaining module 601 is configured to obtain the restriction information of the low power mode subcarriers of the corresponding line, where the restriction information of the low power mode subcarriers of the corresponding line includes the information of the TS-LPM of the corresponding line or the information of the DTS-LPM of the corresponding line;
  • the calculating module 602 is configured to calculate a low power mode full rate FFRPM according to the limitation information of the low power mode subcarrier of the corresponding line;
  • the comparison module 603 is configured to compare the size of the FRLPM with the preset low power mode target full rate MRLPM;
  • the control module 604 is configured to enter a low power mode when the FRPPM is greater than or equal to the MRLPM, and select subcarrier transmission data from the TS-LPM of the corresponding line according to the restriction information of the low power mode subcarrier of the corresponding line or do not apply the DTS-LPM Subcarrier transmission data;
  • the TS-LPM includes the available subcarriers in the low power mode of the corresponding line, the DTS-LPM includes the subcarriers that need to be turned off in the low power mode, and the low power mode is the detachable signal on the specified data symbols. Or the energy saving mode of the signal.
  • the transceiver further includes: a first notification module 605, configured to notify the VCE to switch from the full power mode to the low power mode, so that the VCE is based on the low power of the corresponding line. Updating the cancellation matrix of the mode subcarrier limitation information to obtain a first update cancellation matrix;
  • the first receiving module 606 is configured to receive a first update completion notification sent by the VCE after applying the first update cancellation matrix to the canceller;
  • the control module 604 is configured to enter a low power mode after receiving the first update completion notification.
  • the control module 604 is further configured to enter a full power mode when the FRLPM is smaller than the MRLPM, and transmit data using the TS_FPM, where the TS_FPM includes available subcarriers of the corresponding line in the full power mode.
  • the transceiver further includes: a second notification module 607, configured to notify the VCE to switch from the low power mode to the full power mode, so that
  • the VCE updates the cancellation matrix according to the full power mode subcarrier set TS_FPM to obtain a second update cancellation matrix
  • a second receiving module 608, configured to receive a second update completion notification sent by the VCE after applying the second update cancellation matrix to the canceller
  • the control module 604 is configured to enter a full power mode after receiving the second update completion notification, and use TS_FPM to transmit data, where the TS_FPM includes available subcarriers of the corresponding line in the full power mode.
  • control module 604 is configured to close the data symbol transmission signal of the subcarrier in the DTS-LPM, and the synchronization symbol transmission signal is turned on.
  • the transceiver further includes:
  • the determining module 609 is configured to determine whether a trigger condition for updating the restriction information of the low power mode subcarrier of the corresponding line is satisfied;
  • the updating module 610 is configured to: when the trigger condition for updating the restriction information of the low power mode subcarrier of the corresponding line is met, update the restriction information of the low power mode subcarrier of the corresponding line, and/or re-determine whether the corresponding line should enter the LPM or FPM.
  • the determining module 609 is configured to determine that a new line join, an original line departure, a power state change of the line in the system, or an update of the channel matrix, determine that the limitation of updating the low power mode subcarrier of the corresponding line is satisfied.
  • the trigger condition of the message is configured to determine that a new line join, an original line departure, a power state change of the line in the system, or an update of the channel matrix, determine that the limitation of updating the low power mode subcarrier of the corresponding line is satisfied.
  • the transceiver further includes:
  • the first sending module 611 is configured to send, to the canceller, a flag for identifying that the symbol transmission signal is turned off or on, during the signal transmission, so that the canceler obtains the set of lines that are actually turned off on the symbol and/or sends data according to the flag bit.
  • the set of lines, and the precoded signal is compensated according to the set of lines that are actually turned off and/or the set of lines that send the data.
  • the transceiver further includes:
  • a monitoring module 612 configured to monitor service traffic
  • the control module 604 is further configured to switch from the low power mode to the full power mode when the traffic volume is greater than the FRLPM.
  • the obtaining module 601 is configured to receive information of a TS-LPM or a DTS-LPM of a corresponding line sent by the VCE, and acquire, according to information of the TS-LPM or the DTS-LPM, restriction information of the low-power mode sub-carrier of the corresponding line.
  • the transceiver further includes:
  • a second sending module 613 configured to send information of a TS-LPM or a DTS-LPM of the corresponding line to the remote transceiver;
  • a third receiving module 614 configured to receive a reply returned by the remote transceiver
  • the control module 604 is configured to, after the acknowledgment, apply the TS-LPM or DTS-LPM of the corresponding line with the remote transceiver at the specified time point.
  • the transceiver also includes:
  • a third sending module 615 configured to send information about the TS-LPM or DTS-LPM of the suggested corresponding line to the remote transceiver;
  • the fourth receiving module 616 is configured to receive an update that is returned after the remote transceiver updates the TS-LPM or the DTS-LPM of the corresponding line according to the information of the recommended TS-LPM or DTS-LPM of the corresponding line.
  • the control module 604 is configured to, after the acknowledgment, apply the TS-LPM or DTS-LPM of the corresponding line with the remote transceiver at the specified time point.
  • the obtaining module 601 is configured to receive information about a TS-LPM or a DTS-LPM of a corresponding line sent by the near-end transceiver, and acquire a low-power mode of the corresponding line according to the information of the TS-LPM or the DTS-LPM of the corresponding line. Subcarrier restriction information.
  • the transceiver also includes:
  • a reply module 617 configured to return a reply to the near-end transceiver
  • the control module 604 is configured to apply the TS-LPM or DTS-LPM of the corresponding line to the near-end transceiver at the specified time point after the near-end transceiver confirms.
  • the obtaining module 601 is configured to receive TS-LPM or DTS-LPM information of the corresponding line suggested by the near-end transceiver sent by the near-end transceiver; according to the TS-LPM of the corresponding line suggested by the near-end transceiver or The information of the DTS-LPM updates the TS-LPM or DTS-LPM of the corresponding line, and acquires the restriction information of the low-power mode sub-carrier of the corresponding line according to the updated TS-LPM or DTS-LPM of the corresponding line.
  • the transceiver also includes:
  • a fourth sending module 618 configured to send information of the updated TS-LPM or DTS-LPM of the corresponding line to the near-end transceiver;
  • the control module 604 is configured to apply the TS-LPM or DTS-LPM of the corresponding line to the near-end transceiver at the specified time point after the near-end transceiver confirms.
  • the transceiver provided by this embodiment, after obtaining the restriction information of the low power mode subcarrier of the corresponding line of the information including the TS-LPM of the corresponding line or the information of the DTS-LPM, according to the low power mode subcarrier of the corresponding line
  • the restriction information calculates the FRRPM, and after comparing the FRRPM to the MRLPM, enters the low power mode, selects the subcarrier transmission data from the TS-LPM according to the restriction information of the low power mode subcarrier of the corresponding line, or does not apply the subcarrier in the DTS-LPM.
  • the carrier transmits data, so as to avoid the sudden closing of the LPM line part of the symbol, which causes offset errors and avoids the stability degradation of other lines.
  • Embodiment 5 The embodiment provides a vectorization control entity, which is applied in a vectorization system, the vectorization system includes a plurality of lines, and each line includes a plurality of subcarriers.
  • the vectoring control entity includes:
  • the obtaining module 1601 is configured to acquire restriction information of a low power mode subcarrier of any line, where the restriction information of the low power mode subcarrier includes information of a TS-LPM of the corresponding line or information of a DTS-LPM of the corresponding line;
  • the first sending module 1602 is configured to send the restriction information of the low power mode subcarrier of any line to the corresponding transceiver, so that the transceiver calculates the FRRPM according to the restriction information of the low power mode subcarrier of the corresponding line; comparing the FRRPM with the advance The size of the set MRLPM; if the FRRPM is greater than or equal to the MRLPM, enter the low power mode, and select the subcarrier transmission data from the TS-LPM of the corresponding line according to the restriction information of the low power mode subcarrier of the corresponding line or not apply the DTS-LPM Subcarrier transmission data;
  • the TS-LPM includes available subcarriers of the corresponding line in the low power mode
  • the DTS-LPM includes the subcarriers corresponding to the line that needs to be turned off in the low power mode
  • the low power mode is that the signal can be turned off on the designated data symbol or The energy saving mode of the transmitted signal.
  • the obtaining module 1601 includes:
  • the first obtaining unit 16011 is configured to obtain, for each subcarrier k, a channel matrix H eq k of the subcarrier k, where H eq k is a matrix of M*M, where M is the total number of lines that have joined and are about to join the vectorization system. ;
  • a second obtaining unit 16012 configured to calculate the precoding matrix P k, and obtain the precoding matrix P k P k matrix d to dd is the index of the sub;
  • the third obtaining unit 16013 is configured to obtain, according to ⁇ , a normalized matrix that has a diagonal of all ones.
  • the determining unit 16014 determines whether a modulus value or a modulus value of the non-diagonal elements in the non-diagonal element is greater than a pre- Set a threshold value;
  • the joining unit 16015 is configured to add the subcarrier k to the low power mode off subcarrier set DTS_LPM of the line i or the line j when the modulus value or the modulus value of the non-diagonal element is greater than the preset threshold value;
  • the determining unit 16016 is configured to use the information of the DTS-LPM of any line as the restriction information of the low power mode subcarrier of any line; or obtain the TS-LPM of any line according to the DTS_LPM of any line, and The information of the TS-LPM of a line serves as the restriction information of the low power mode subcarriers of any line. Further, the adding unit 16015 is configured to add the subcarrier k to the DTS_LPM of the line i or the line j according to the priority of the line i and the line j set in advance.
  • the vectoring control entity further includes:
  • a first receiving module 1603, configured to receive a notification that the transceiver switches from a full power mode to a low power mode
  • the first update module 1604 is configured to update the cancellation matrix according to the information of the low power mode subcarriers of any line, to obtain a first update cancellation matrix;
  • a first application module 1605 configured to apply a first update cancellation matrix to the canceller
  • the second sending module 1606 is configured to send a first update completion notification to the transceiver, so that the transceiver enters the low power mode after receiving the first update completion notification.
  • the vectoring control entity further includes:
  • a second receiving module 1607 configured to receive a notification that the transceiver switches from a low power mode to a full power mode
  • a second update module 1608, configured to update a cancellation matrix according to a full power mode subcarrier set TS-FPM of any line, to obtain a second update cancellation matrix;
  • a second application module 1609 configured to apply a second update cancellation matrix to the canceller
  • the third sending module 1610 is configured to send a second update completion notification to the transceiver, so that after receiving the second update completion notification, the transceiver enters a full power mode, where the full power mode is a power that must be sent on the specified data symbol. mode.
  • the vectorization control entity obtained in this embodiment obtains the restriction information of the low power mode subcarrier of any line, and sends the restriction information to the corresponding transceiver, so that the transceiver adjusts the restriction information of the low power mode subcarrier according to the corresponding line.
  • the FRMPM is calculated, and after the FRRPM is equal to or greater than the MRLPM, after entering the low power mode, the subcarrier transmission data may be selected from the TS-LPM according to the restriction information of the low power mode subcarrier of the corresponding line or the DTS-LPM transmission data is not applied, thereby avoiding
  • the sudden closing of the LPM line part symbol causes an offset error and avoids a decrease in the stability of other lines.
  • Embodiment 6 This embodiment provides a power control system. Referring to FIG. 20, the system includes: a transceiver 2001 and a vectorization control entity 2002;
  • transceivers 2001 For the details of the transceivers 2001, the transceivers of the foregoing embodiment 4 are described in detail in the fourth embodiment.
  • the transceivers 2001 may be one or more.
  • the number of the transceivers 2001 is not limited in this embodiment.
  • the vectorization control entity 2002 is as described in the fifth embodiment above. For details, refer to the content of the fifth embodiment.
  • the system after obtaining the restriction information of the low power mode subcarrier of the corresponding line including the information of the TS-LPM of the corresponding line or the information of the DTS-LPM by the transceiver, according to the low power mode subcarrier of the corresponding line
  • the restriction information calculates the FRRPM and enters the low power mode after comparing the FRRPM with the MRLPM, and selects the subcarrier transmission data from the TS-LPM according to the restriction information of the low power mode subcarrier of the corresponding line or does not apply in the DTS-LPM.
  • the subcarrier transmits data, so as to avoid the sudden closing of the LPM line part of the symbol, which causes offset errors and avoids the stability degradation of other lines.
  • the transceiver and the vector control entity provided by the foregoing embodiments are only illustrated by the division of the foregoing functional modules when performing power control. In actual applications, the foregoing functions may be assigned different functions according to requirements. The module is completed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.
  • the embodiments of the transceiver, the vector control entity, the power control system, and the power control method provided by the foregoing embodiments are in the same concept. For details, refer to the method embodiments, and details are not described herein.
  • serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

La présente invention se rapporte à un procédé de régulation de puissance, à un appareil émetteur-récepteur, à un module de contrôle de vectorisation, et à un système. L'invention appartient au domaine technique des communications. Le procédé est utilisé dans un système de vectorisation. Le système de vectorisation comprend une pluralité de lignes, et chaque ligne comprend une pluralité de sous-porteuses. Le procédé selon l'invention consiste : à obtenir des informations de limitation d'une sous-porteuse en mode d'économie d'énergie d'une ligne correspondante, les informations de limitation de la sous-porteuse en mode d'économie d'énergie comprenant un TS-LPM ou un DTS-LPM de la ligne correspondante ; à calculer un FRLPM en se basant sur les informations de limitation de la sous-porteuse en mode d'économie d'énergie de la ligne correspondante ; et, si le FRLPM est égal ou supérieur à un MRLPM, à passer dans un mode d'économie d'énergie et à sélectionner une sous-porteuse dans le TS-LPM de la ligne correspondante afin de transmettre des données ou ne pas utiliser la sous-porteuse dans le DTS-LPM pour transmettre des données en se basant sur les informations de limitation de la sous-porteuse en mode d'économie d'énergie de la ligne correspondante. Dans la présente invention, un appareil émetteur-récepteur passe dans un mode d'économie d'énergie et une sous-porteuse est sélectionnée dans un TS-LPM d'une ligne correspondante afin de transmettre des données, ou un DTS-LPM n'est pas utilisé pour transmettre des données. L'invention empêche ainsi qu'une erreur ne se produise dans un cas d'annulation, lorsqu'une partie des symboles d'une ligne LPM sont soudain fermés, et elle empêche ainsi que la stabilité d'une autre ligne ne soit affectée négativement.
PCT/CN2013/076546 2013-05-31 2013-05-31 Procédé de régulation de puissance, appareil émetteur-récepteur, module de contrôle de vectorisation, et système WO2014190539A1 (fr)

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PCT/CN2013/076546 WO2014190539A1 (fr) 2013-05-31 2013-05-31 Procédé de régulation de puissance, appareil émetteur-récepteur, module de contrôle de vectorisation, et système

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