WO2018112807A1 - 串扰抵消方法、装置及系统 - Google Patents

串扰抵消方法、装置及系统 Download PDF

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Publication number
WO2018112807A1
WO2018112807A1 PCT/CN2016/111372 CN2016111372W WO2018112807A1 WO 2018112807 A1 WO2018112807 A1 WO 2018112807A1 CN 2016111372 W CN2016111372 W CN 2016111372W WO 2018112807 A1 WO2018112807 A1 WO 2018112807A1
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Prior art keywords
crosstalk
cancellation
coefficient
ports
canceling
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PCT/CN2016/111372
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English (en)
French (fr)
Inventor
谢根茂
裴道裕
万席锋
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华为技术有限公司
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Priority to EP16924327.6A priority Critical patent/EP3541047B1/en
Priority to PCT/CN2016/111372 priority patent/WO2018112807A1/zh
Publication of WO2018112807A1 publication Critical patent/WO2018112807A1/zh

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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
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing
    • H04B3/487—Testing crosstalk effects

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a crosstalk cancellation method, apparatus, and system.
  • the crosstalk canceling device for eliminating crosstalk interference between the central office equipment and the user front end device is generally a vector.
  • Controlling entity (English: Vectoring Control Entity; referred to as: VCE) chip.
  • the VCE chip is generally disposed in a central office device of the DSL, for example, a Digital Subscriber Line Access Multiplexer (DSLAM).
  • DSL Digital Subscriber Line Access Multiplexer
  • the VCE chip mainly includes a control module and a crosstalk cancellation module.
  • the control module is configured to calculate channel crosstalk between the central office device and the CPE according to the channel physical parameter reported by the baseband chip, and generate a crosstalk coefficient;
  • the crosstalk cancellation module is configured to receive the crosstalk signal of the multiple ports in the central office device. And preprocessing the crosstalk signal according to the crosstalk coefficient.
  • the capacity of the VCE chip is generally a fixed capacity, and only a crosstalk signal of a certain number of ports can be processed, and the VCE chip has low flexibility in use.
  • the present application provides a crosstalk cancellation method, device and system.
  • the technical solution is as follows:
  • a crosstalk cancellation device may include a computing center and a cancellation module deployed at different physical locations.
  • the computing center can be deployed on a cloud server or a central office service.
  • the offset module can be deployed in the central office device.
  • the cancellation module may include: L cancellers, where L is a positive integer.
  • the operation center may be connected to the cancellation module through a first network interface, and connected to the baseband chip through a second network interface; the operation center is configured to calculate a crosstalk coefficient according to the state parameter and the channel physical parameter reported by the baseband chip, and pass the first A network interface sends the crosstalk coefficient to the canceller in the cancellation module.
  • Each of the canceller modules is coupled to at least one port, each canceller for preserving crosstalk signals received through the at least one port for preprocessing.
  • the first network interface, the second network interface, and the third network interface may all be Ethernet interfaces.
  • the crosstalk cancellation device shown in the embodiment of the present invention deploys the computing center and the cancellation module in different physical locations, and modularizes the cancellation module. Therefore, when the number of signal transceiving ports of the central office device increases, By increasing the number of cancellers in the cancellation module and allocating more computing resources to the computing center, the crosstalk cancellation scale expansion of the crosstalk cancellation device can be realized.
  • the expansion method does not need to customize a new chip, and the expansion is relatively simple.
  • the number of cancellers included in the cancellation module may be greater than 1, and any two of the L cancellers are connected to each other through a third network interface.
  • the ith canceller of the L cancellers is connected to the Ni ports, and the ith canceller is configured to: receive the Ni crosstalk signal through the Ni ports, and pass the received Ni crosstalk signals through the third network.
  • the interface is sent to other L-1 cancellers respectively, and the Ni crosstalk signal is preprocessed according to the crosstalk coefficient and the crosstalk signals sent by other L-1 cancellers.
  • the cancellation module is a hardware module in the crosstalk cancellation device, and each of the cancellation modules can be configured in the form of a chip in the central office device.
  • the modular design of the hardware module makes the number of cancellers in the cancellation module easy to adjust, so that the crosstalk cancellation capability of the cancellation module is adjustable, and the use flexibility of the cancellation module is improved.
  • the operation center may include: a state control unit and at least one coefficient operation unit.
  • the state control unit is configured to receive a state parameter and a channel physical parameter reported by the baseband chip, and determine a crosstalk coefficient calculation model according to the state parameter; each coefficient operation unit is configured to control the state Under the instruction of the unit, the model is calculated according to the crosstalk coefficient, and the physical parameters of the channel are calculated to obtain crosstalk coefficients of multiple ports or multiple subcarriers.
  • the coefficient operation unit of the operation center is distributedly distributed, by adding the number of coefficient operation units in the calculation center, that is, all the processing is allocated to the operation center.
  • the unit can realize the expansion of the operation scale of the crosstalk canceling device.
  • a crosstalk cancellation system in a second aspect, can include: M cascaded crosstalk cancellation devices, each crosstalk cancellation device can be the crosstalk cancellation device shown in the first aspect, the M being an integer greater than one. .
  • the computing center in any two crosstalk canceling devices is connected to each other through a fourth network interface, and the computing center in each of the crosstalk canceling devices is further configured to send the received channel physical parameters to the fourth network interface respectively.
  • the signals are sent to the cancellation modules in the other M-1 crosstalk cancellation devices via the third network interface.
  • the processing capability of the crosstalk cancellation system can be further improved by cascading a plurality of crosstalk canceling devices into a crosstalk cancellation system.
  • the crosstalk cancellation system can preprocess the crosstalk signal between different central office devices, further improving the crosstalk signal. Processing effect.
  • a crosstalk cancellation method comprising:
  • the operation center receives the port information reported by the cancellation module through the first network interface, where the cancellation module includes L cancelers, and the port information includes an identifier of a port connected to each of the L cancellers, the L Is a positive integer;
  • the computing center may receive the status parameter and the channel physical parameter reported by the baseband chip through the second network interface; calculate the crosstalk coefficient according to the state parameter and the channel physical parameter, and deliver the crosstalk coefficient to the corresponding one of the cancellation module Counterbalancer.
  • the calculating, by the computing center, the crosstalk coefficient according to the state parameter and the channel physical parameter may include:
  • the process of the operation center sending the crosstalk coefficient to the corresponding canceller in the cancellation module according to the port information may include:
  • the crosstalk coefficients of the K ports are respectively sent to the cancellers connected to the K ports.
  • the computing center may include:
  • the number of interactive messages between the computing center and the cancellation module can be reduced, and the transmission efficiency of the crosstalk coefficient can be improved.
  • the computing center may further encapsulate the crosstalk coefficient of each port of the K ports, and then send the encapsulated packet to the canceller connected to the K ports.
  • the crosstalk coefficient is encapsulated in a message and then sent to the canceller, which can reduce the amount of data transmitted and improve the transmission efficiency of the crosstalk coefficient.
  • the receiving, by the computing center, the status parameter and the channel physical parameter reported by the baseband chip by using the second network interface may include: receiving, by using the second network interface, a status parameter reported by the baseband chip; and transmitting the channel physical parameter to the baseband chip.
  • a crosstalk cancellation method is provided, and the method can include:
  • the canceling module reports the port information to the computing center through the first network interface, where the canceling module includes L cancellers, where the port information includes an identifier of a port connected to each of the L cancellers, where L is a positive integer ;
  • the canceling module can receive the crosstalk coefficients of the K ports issued by the computing center through the J cancellers, and drive each of the J cancelers, and according to the crosstalk coefficient, the received at least one way
  • the crosstalk signal is preprocessed.
  • the J cancellers are cancellers connected to the K ports, and the J is a positive integer less than or equal to L.
  • the cancellation module drives each of the J cancelers, and the process of pre-processing the received at least one crosstalk signal according to the crosstalk coefficient may include:
  • the cancellation module drives each of the J cancelers to transmit the received at least one crosstalk signal to the other J-1 cancelers, and drives each of the cancelers according to the The crosstalk coefficient and the crosstalk signal sent by the other J-1 cancellers preprocess the at least one crosstalk signal.
  • the process for the cancellation module to receive the crosstalk coefficients of the K ports delivered by the computing center by using the J cancellers may include:
  • the cancellation module receives a coefficient configuration instruction sent by the operation center, where the coefficient configuration instruction is used to indicate that the number of ports of the crosstalk coefficient to be sent is K; and then sends a response instruction to the operation center; then the cancellation module can pass the J
  • the canceller receives the crosstalk coefficient of each of the K ports issued by the computing center; when the cancellation module determines that the crosstalk coefficients of all the K ports are received, the stop command is sent to the computing center.
  • the process for the cancellation module to receive the crosstalk coefficients of the K ports delivered by the computing center by using the J cancellers may include:
  • the encapsulated packet sent by the computing center is received by the J cancellers; the packet is decapsulated to obtain the crosstalk coefficient of the K ports.
  • a crosstalk cancellation method which can be applied to a crosstalk cancellation system as shown in the second aspect, the M cascaded crosstalk cancellation device includes a main control crosstalk cancellation device And M-1 slave crosstalk cancellation devices, the method comprising:
  • Each crosstalk canceling device receives a status parameter and a channel physical parameter reported by the baseband chip
  • the computing center in the main crosstalk canceling device sends an interactive command to the computing centers in the other M-1 slave crosstalk canceling devices respectively;
  • the computing center in each crosstalk canceling device separately transmits channel physical parameters to the computing centers of the other M-1 crosstalk canceling devices according to the interactive instruction;
  • the calculation center in each crosstalk cancellation device calculates a crosstalk coefficient according to the received channel physical parameter, and sends the crosstalk coefficient to the corresponding cancellation module;
  • the cancellation module in each crosstalk cancellation device transmits the received crosstalk signal to the cancellation module in the other M-1 crosstalk cancellation devices respectively;
  • the cancellation module in each crosstalk cancellation device preprocesses the crosstalk signal received by the module according to the crosstalk coefficient and the crosstalk signal sent by the other M-1 crosstalk cancellation devices.
  • a computing center comprising: at least one unit, the at least one unit can be used to implement the crosstalk cancellation method provided by the third aspect above.
  • a cancellation module comprising: at least one unit, the at least one unit can be used to implement the crosstalk cancellation method provided in the fourth aspect above.
  • the embodiment of the present invention provides a crosstalk cancellation method, apparatus, and system.
  • the operation center and the cancellation module in the crosstalk cancellation device are deployed in different physical locations, and the cancellation module may include at least one canceller.
  • the crosstalk offset scale expansion of the crosstalk canceling device can be realized by increasing the number of cancellers in the canceling module and allocating more computing resources to the computing center.
  • the expansion method does not need to customize a new chip, and the expansion is relatively simple, so the crosstalk cancellation processing can be flexibly performed on the central office devices of different port numbers.
  • FIG. 1 is a schematic diagram of an application scenario of a crosstalk cancellation device according to an embodiment of the present invention
  • 2-1 is a schematic structural diagram of a crosstalk canceling apparatus according to an embodiment of the present invention.
  • FIG. 2-2 is a schematic structural diagram of another crosstalk canceling apparatus according to an embodiment of the present invention.
  • 3-1 is a flowchart of a crosstalk cancellation method according to an embodiment of the present invention.
  • 3-2 is a flowchart of a method for transmitting a crosstalk coefficient by a computing center according to an embodiment of the present invention
  • 3-3 is a flowchart of a method for pre-processing a crosstalk signal by a cancellation module according to an embodiment of the present invention
  • 4-1 is a schematic structural diagram of a crosstalk cancellation system according to an embodiment of the present invention.
  • 4-2 is a flowchart of another crosstalk cancellation method according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a computing center according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a cancellation module according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of an application scenario of a crosstalk cancellation device according to an embodiment of the present disclosure.
  • the application scenario may include a crosstalk cancellation device 00, a baseband chip 01, and multiple CPEs.
  • the baseband chip 01 is deployed in a central office device, and the baseband chip 01 can establish a communication connection with the plurality of CPEs through multiple signaling ports (for example, P1, P2, and P3), and is used for the central office device and multiple CPEs.
  • the interaction signal between the two is analog to digital conversion or digital to analog conversion.
  • the crosstalk canceling device 00 is connected to the baseband chip 02 for pre-processing the signal after the analog-to-digital conversion of the baseband chip 02 or the signal before the digital-to-analog conversion.
  • the pre-processing may include performing crosstalk cancellation processing on the analog-to-digital converted signal (ie, the uplink signal) of the baseband chip 02, and pre-coding the signal before the digital-to-analog conversion of the baseband chip 02 (ie, the downlink signal).
  • the crosstalk canceling apparatus may include a computing center 02 and a canceling module 03 deployed at different physical locations.
  • the operation center 02 can be deployed in a cloud server or a central office server.
  • the cancellation module 03 can be deployed in a central office device of the DSL, and the cancellation module 03 can include: L cancellers, where L is a positive integer.
  • the computing center 02 can be connected to the cancellation module 03 via a first network interface and to the baseband chip 01 via a second network interface (not shown in Figure 2-1).
  • the computing center 02 is configured to calculate a crosstalk coefficient according to the state parameter and the channel physical parameter reported by the baseband chip 01, and deliver the crosstalk coefficient to the canceller in the cancellation module 03 through the first network interface.
  • Each of the canceller modules 03 is coupled to at least one port in the baseband chip for preprocessing the crosstalk signal received through the at least one port based on the crosstalk coefficient.
  • the port to which each canceller is connected refers to a signal transceiving port on the baseband chip 01.
  • the embodiment of the present invention provides a crosstalk cancellation device.
  • the operation center and the cancellation module in the crosstalk cancellation device are deployed in different physical locations, and the cancellation module may include at least one canceller.
  • the crosstalk offset scale expansion of the crosstalk canceling device can be realized by increasing the number of cancellers in the canceling module and allocating more computing resources to the computing center.
  • the expansion method does not need to customize a new chip, and the expansion is relatively simple, so the crosstalk cancellation processing can be flexibly performed on the central office devices of different port numbers.
  • the operation center 02 may include a state control unit 021 and at least one coefficient operation unit 022.
  • the state control unit 021 is configured to receive the state parameter and the channel physical parameter reported by the baseband chip, and determine a crosstalk coefficient calculation model according to the state parameter.
  • Each of the at least one coefficient operation unit 022 is configured to calculate a model according to the crosstalk coefficient and perform calculation on the physical parameter of the channel to obtain a plurality of ports or multiple subcarriers under the instruction of the state control unit 021.
  • Crosstalk coefficient is configured to calculate a model according to the crosstalk coefficient and perform calculation on the physical parameter of the channel to obtain a plurality of ports or multiple subcarriers under the instruction of the state control unit 021.
  • the device for example, the central office server deployed by the computing center 02
  • a plurality of processing units may be included, each of the coefficient operation units being bound to a processing unit for computing a crosstalk coefficient of a certain number of ports or subcarriers.
  • the crosstalk canceling device needs to process the 64-port crosstalk signal, and each coefficient operation unit in the operation center can complete the operation of the cross-talk coefficient of 16 ports, which can be completed by using four coefficient operation units.
  • each coefficient operation unit can complete 700 sub-carriers
  • the calculation of the crosstalk coefficient of the carrier can complete the calculation of the crosstalk coefficient of 2048 subcarriers by three coefficient operation units.
  • the crosstalk canceling device can be realized by increasing the number of coefficient operation units in the computing center, that is, by allocating more processing units to the computing center. Expansion of the scale of operations. For example, when the signaling port of the central office device is increased from 64 to 80, a coefficient operation unit can be added to the computing center (that is, a processing unit is further allocated to the computing center), so that crosstalk cancellation can be realized.
  • the expansion of the scale of the device operation. The expansion method is relatively simple, and there is no need to customize a new chip, which improves the flexibility of the crosstalk cancellation device.
  • the L may be an integer greater than 1, that is, the canceling module 03 may include multiple cancellers 031, and any two of the L cancellers 031
  • the cancellers can be connected to each other through a third network interface.
  • the i-th canceller of the L cancellers may be connected to Ni ports, where i is a positive integer less than or equal to L, and the Ni is a positive integer.
  • the ith canceller is configured to: receive a Ni crosstalk signal through the Ni ports, and send the received Ni crosstalk signal to the other L-1 cancelers through the third network interface, and according to the crosstalk coefficient And the crosstalk signal sent by the other L-1 cancellers to preprocess the Ni crosstalk signal. Therefore, the ith canceller can handle at least N ports interference to each of the N i ports, where N satisfies: That is, N is the total number of ports connected to the cancellation module.
  • the specification of the ith canceller may be represented by Ni ⁇ N, that is, the number of ports connected to the ith canceller is Ni, and the ith canceller can process at least N ports. Interference caused by Ni ports.
  • the cancellation module 03 can include four cancellers, each of which can be connected to 16 ports in the baseband chip. Therefore, each canceller can receive 16 crosstalk signals and can send the 16 crosstalk signals to the other three cancellers through the Ethernet interface. At the same time, each canceller can also receive a total of 48 crosstalk signals sent by the other three cancellers, after which each canceller can receive the canceler according to the received crosstalk coefficient and the 48 crosstalk signals.
  • the 16-channel crosstalk signal is preprocessed.
  • each of the cancellers in the cancellation module can be a custom-sized chip. Since the hardware in the crosstalk canceling device (ie, the canceling module) is modularly designed, when the number of ports of the authority device increases, by increasing the number of cancellers in the canceling module (ie, stacking more chips), The expansion of the cancellation module crosstalk cancellation capability can be implemented, so that the expanded cancellation module can match the number of ports of the central office device, thereby effectively improving the flexibility of use of the cancellation module and the crosstalk cancellation device.
  • the ports connected to a canceller are not online, since the unconnected ports do not interfere with the crosstalk signals of other ports, they are sent to each other at each canceller.
  • the crosstalk signal it is not necessary to send a crosstalk signal to the canceller to which the unwired port is connected.
  • the canceling module 03 can control the canceller 1 when preprocessing the crosstalk signal.
  • the cancellers 3 transmit crosstalk signals to each other without transmitting a crosstalk signal to the canceller 4.
  • the first to third network interfaces may all be Ethernet interfaces.
  • the operation center 02 may further include an operation adapting unit 023, and the operation adapting unit 023 is used between the computing center 02 and the canceling module 03.
  • the interactive message is adapted and the interaction message between the computing center 02 and the baseband chip 01 is adapted.
  • the cancellation module 03 may further include a cancellation adaptation unit 032 and an offset driving unit 033 for adapting the interaction message between the cancellation module 03 and the operation center 02,
  • the cancellation driving unit 033 is configured to configure the received crosstalk coefficients to the respective cancelers 031, and drive the respective cancelers 031.
  • the embodiment of the present invention provides a crosstalk cancellation device, in which the operation center and the cancellation module are deployed in different physical locations.
  • the operation center may be deployed in a cloud server or a central office server, and the cancellation module may be deployed in the central office device, and the cancellation module may include at least one canceller. Therefore, when the signal transceiving capacity of the central office device increases, the offset of the crosstalk canceling device can be achieved by increasing the number of cancellers in the canceling module and allocating more computing resources to the computing center.
  • the expansion method eliminates the need to customize a new chip, and the expansion is relatively simple, and the crosstalk cancellation processing can be flexibly performed on the central office devices of different port numbers.
  • FIG. 3-1 is a flowchart of a crosstalk cancellation method according to an embodiment of the present disclosure. The method may be applied to the application scenario shown in FIG. 1 . Referring to FIG. 3-1, the method may include:
  • Step 201 The cancellation module sends the port information to the computing center through the first network interface.
  • the cancellation module in the crosstalk cancellation device may include L cancelers, wherein the ith canceller is connected to the N i ports.
  • i is a positive integer less than or equal to L
  • Ni is a positive integer.
  • the i-th canceller is configured to pre-process the transmit and receive signals of the N i ports, and the i-th canceller can process at least interference of the N ports to each of the N i ports, where N satisfies: That is, N is the total number of ports connected to the cancellation module.
  • each of the canceling modules can report the port information to the state control unit in the computing center through the first network interface, where the port information can include the identifier of the port to which each canceller is connected ( For example, the port number).
  • the state control unit determines the crosstalk coefficient that needs to be sent to each canceller based on the port information. Further, the computing center may further determine, according to the port information, the total number of ports connected to the cancellation module, thereby determining the maximum size of the crosstalk coefficient to be calculated. Since the i-th canceller of the L cancellers is connected to the N i ports, the state control unit can determine that the total number of ports connected to the canceling module is N. That is, the cancellation module can handle at least crosstalk between the N ports, so the state control unit can determine that the crosstalk coefficients of the N ports need to be calculated at most.
  • the cancellation module includes four cancellers, each of which is connected to 16 ports.
  • the port information can be reported to the state control unit in the computing center through the Ethernet interface.
  • the port information can be as shown in Table 1, wherein the port to which the canceller 1 is connected is the port number 1 to 16, and the port to which the canceller 4 is connected is the port number 49 to 64.
  • the size of each canceller can be expressed as 16 ⁇ 64, that is, the number of ports connected to each canceller is 16, and each canceller can process at least 64 ports to cause the 16 ports. Interference.
  • Canceller The port number Canceller 1 1-16 Canceller 2 17-32 Canceller 3 33-48 Canceller 4 49-64
  • Step 202 The baseband chip reports the status parameter to the computing center through the second network interface.
  • the baseband chip deployed in the central office device is used for analog-to-digital conversion or digital-to-analog conversion on the transceiving signals of the respective ports.
  • the baseband chip may include multiple states during operation, such as OPV1, RPV1, or OPV2.
  • the state control unit in the computing center may report the change through the second network interface.
  • Status parameter is used to indicate the status of each of the current uplink ports in the baseband chip.
  • the status parameter reported by the baseband chip to the status control unit in the computing center through the Ethernet interface may include: a status of each of the K ports currently on the line.
  • Step 203 The computing center sends a channel physical parameter acquisition request to the baseband chip by using the second network interface.
  • the baseband chip After the state control unit in the computing center receives the state parameter reported by the baseband chip, it can The baseband chip sends a channel physical parameter acquisition request to obtain the channel physical parameter reported by the baseband chip.
  • the channel physical parameter is a parameter for reflecting a channel condition, and specifically includes a channel gain, a frequency domain equalization coefficient (English: frequency domain equalize; abbreviation: FEQ), and a deviation coefficient (English: Error Report Block; abbreviation: ERB). .
  • Step 204 The baseband chip reports channel physical parameters to the state control unit.
  • the baseband chip After receiving the physical parameter acquisition request of the channel, the baseband chip can report the current channel physical parameter to the state control unit in the computing center through the second network interface. For example, the parameters of the current channel, such as gain, FEQ, and ERB, are reported.
  • Step 205 Calculate a crosstalk coefficient according to the state parameter and the channel physical parameter.
  • the state control unit in the computing center may determine the crosstalk coefficient calculation model according to the state parameter reported before the baseband chip, and calculate the total number of ports currently online according to the state of the baseband chip. K, the K is a positive integer less than or equal to N. Therefore, the state control unit can determine that only the crosstalk coefficients of the K ports need to be calculated. Thereafter, the state control unit may send the received channel physical parameter to the coefficient operation unit, and control the coefficient operation unit to calculate a model according to the crosstalk coefficient, and calculate the physical parameter of the channel, thereby obtaining each of the K ports. The crosstalk coefficient of the port.
  • the crosstalk coefficient calculated by the coefficient operation unit can be represented by a three-dimensional matrix of K ⁇ K ⁇ M.
  • the crosstalk coefficients of the K ports can be expressed as:
  • h ij is the crosstalk coefficient used to cancel the interference caused by the jth port to the i-th interfered port (victim port).
  • h 12 is the crosstalk coefficient used to cancel the interference caused by port 2 to port 1.
  • the K coefficients of the i-th row in the matrix are the crosstalk coefficients used to cancel the interference caused by each of the K ports to the i-th interfered port. That is, the crosstalk coefficient of each interfered port may include K coefficients.
  • Step 206 According to the port information reported by the cancellation module, the crosstalk coefficients of the K ports are divided into J groups of crosstalk coefficients.
  • the number J of the cancellers connected to the K ports may be determined according to the identifier of the port connected to each of the L cancellers, and then the K ports are The crosstalk coefficient is divided into J groups of crosstalk coefficients.
  • the j-th group crosstalk coefficient includes a crosstalk coefficient of the Kj ports to which the j-th cancellation sub-module is connected, and j is an integer greater than or equal to 1 and less than or equal to J.
  • the state control unit may determine the offset.
  • the four cancellers in the module are connected to the 64 ports, so the crosstalk coefficient shown in the formula (1) can be divided into four sets of crosstalk coefficient.
  • the first set of crosstalk coefficient H1 corresponding to the canceller 1 may include the crosstalk coefficients of the first to the 16th lines of the crosstalk coefficients shown in the formula (1), and the fourth group of crosstalk coefficients H4 corresponding to the canceller 4.
  • the crosstalk coefficients of the 49th to 64th lines of the crosstalk coefficients shown in the formula (1) may be included.
  • the computing center can divide the crosstalk coefficient of the 48 ports into three sets of crosstalk coefficient.
  • Step 207 Send each of the crosstalk coefficients of the crosstalk coefficients to the corresponding canceller through the first network interface.
  • the state control unit may separately send the J group crosstalk coefficients to the J offsets Corresponding canceller in the device.
  • the amount of data to be transmitted is compressed, and the sending process of the crosstalk coefficient may be as shown in FIG. 3-2, including:
  • Step 2071 The state control unit performs packet encapsulation on the crosstalk coefficient of each port.
  • the state control unit may separately encapsulate the crosstalk coefficients of each port (which may also be referred to as a victim port) according to a preset message structure. If the maximum length of each message is MaxB bytes (for example, 1500 bytes), the crosstalk coefficient width of each subcarrier is n bytes, and each port includes M subcarriers, then crosstalk for each interfered port. When each coefficient in the coefficient is encapsulated, the number of required packets may be: n ⁇ M/MaxB. In addition, since the crosstalk coefficients of each of the interfered ports may include K coefficients, the number of packets required for encapsulating the crosstalk coefficients of each of the interfered ports may be: K ⁇ (n ⁇ M/MaxB) ).
  • the message structure of each message may be: [interfered port number] [interference port number] [fragment index] [coefficient format] [coefficient]; coefficient format in the message structure It refers to the format of each crosstalk coefficient.
  • the format of the crosstalk coefficient can be defined by the payload (English: payload) format.
  • the coefficient format can be generally [imaginary part] [real part] [index].
  • the bit width of the coefficient and the multiplexing of the index can also be defined.
  • the format of the coefficient may be [imaginary part] [real part] [index], and the coefficient format may further include a management field: [coefficient bit width] [exponential multiplexing].
  • the coefficient bit width refers to the bit width of the imaginary part and the real part of the definition coefficient
  • the exponential multiplexing refers to an index defining a coefficient of several subcarriers for multiplexing.
  • the coefficient width of the imaginary part and the real part can be defined as 10
  • the coefficients of 4 subcarriers can be defined to be multiplexed by an index. Since the indices of the adjacent subcarriers are generally of the same or similar order, a plurality of adjacent subcarriers can be shared by one index. This can further reduce the amount of data that needs to be transferred.
  • Step 2072 The state control unit sends a coefficient configuration instruction to the cancellation module.
  • the coefficient configuration command may be sent to the canceller, where the coefficient configuration command may include the number of ports of the crosstalk coefficient that the state control unit will deliver, to indicate that the cancellation module starts to perform coefficient configuration.
  • the coefficient configuration instruction can be used to indicate the crosstalk coefficient to be sent The number of ports is K.
  • the coefficient configuration instruction may be used to indicate that the state control unit will deliver a crosstalk coefficient of 64 ports.
  • Step 2073 When the status control unit receives the response instruction, it starts to cyclically send the message.
  • the canceling module may send a response command to the state control unit.
  • the state control unit may send the packet with the crosstalk coefficient of the K ports in sequence through the first network interface. Up to each of the J cancelers, and the state control unit may cyclically transmit the crosstalk coefficients of the K ports to the J cancellers until a stop command sent by the cancellation module is received. That is, the state control unit sequentially sends the crosstalk coefficients of the first to Kth ports to the corresponding cancellers, and if the stop command is not received, the crosstalk of the first to Kth ports may be sequentially transmitted. coefficient. Since the crosstalk coefficient of each port is encapsulated in In the message, therefore, the state control unit needs to send the crosstalk coefficient of each port when sending Messages, of which Indicates rounding up.
  • the state control unit may first deliver the crosstalk coefficients of the ports 1 to 16 to the canceller 1, and then sequentially issue the crosstalk coefficients of the ports 17 to 32 to the canceller 2, and then sequentially to the canceller 3.
  • the crosstalk coefficients of ports 33 to 48 are delivered, and finally the crosstalk coefficients of ports 49 to 64 are sequentially sent to the canceller 4.
  • the status control unit may continue to send the packets in the form of packets in the form of packets.
  • Crosstalk coefficient may be used to send the packets in the form of packets in the form of packets.
  • Step 208 When the cancellation module receives the crosstalk coefficients of all K ports, send a stop instruction to the operation center.
  • the state control unit sends a coefficient configuration command to the cancellation module before transmitting the crosstalk coefficient, and the cancellation module can determine, according to the coefficient configuration instruction, that the number of ports of the crosstalk coefficient to be received is K. Therefore, in the process of receiving the crosstalk coefficient, the cancellation module can detect in real time whether the crosstalk coefficients of the K ports have been normally received. After the cancellation module determines that the crosstalk coefficients of all K ports are received, a stop command can be sent to the computing center. If the operation center of the operation module sends a round of crosstalk coefficients to all K ports, the cancellation module detects that the K ports are stored. If the crosstalk coefficient of several ports fails to be received normally, the stop command will not be sent to the computing center.
  • the computing center may sequentially deliver the crosstalk coefficients of the K ports to the cancellation module until the stop command sent by the cancellation module is received.
  • the number of interaction messages between the cancellation module and the operation center is small, and the efficiency of the crosstalk coefficient is improved.
  • Step 209 The cancellation module preprocesses the crosstalk signals of the K ports according to the received crosstalk coefficients.
  • the canceling module can receive the packet according to the preset packet structure.
  • the received message is decapsulated to obtain the crosstalk coefficient encapsulated in the message.
  • the cancellation module can preprocess the received K-channel crosstalk signal according to the crosstalk coefficient.
  • the process for pre-processing the crosstalk signal by the cancellation module may specifically include:
  • Step 2091 The cancellation module drives each of the J cancelers to send the received at least one crosstalk signal to the other J-1 cancelers.
  • each of the J cancelers is respectively connected to at least one port, and at least one crosstalk information can be received through the at least one port. Since when at least J is greater than 1, the at least one crosstalk signal is also interfered by the crosstalk signals received by the other J-1 cancellers, so that each canceller can preprocess the received at least one crosstalk signal. When J is greater than 1, the cancellation module may further drive each canceller to separately send the received at least one crosstalk signal to the other J-1 cancelers. Therefore, each canceller can also receive crosstalk signals sent by other J-1 cancellers.
  • the jth canceller can receive the Kj crosstalk signal through the Kj ports, so the jth canceller can send the Kj crosstalk signal to the other J-1 cancelers through the third network interface, and Receives a common (K-Kj) crosstalk signal sent by other J-1 cancellers. Therefore, each canceller can receive a total of K crosstalk signals. In addition, when J is equal to 1, the one canceler can directly preprocess the received crosstalk signal.
  • the cancellation module can drive the canceller 1 to The received 16 crosstalk signals are sent to the canceller 2 to the canceller 4, respectively.
  • the canceller 1 can also receive a total of 48 crosstalk signals transmitted by the canceller 2 to the canceller 4.
  • Step 2092 The cancellation module drives each canceller to preprocess the at least one crosstalk signal according to the received crosstalk coefficient and the crosstalk signals sent by other J-1 cancellers.
  • the j-th crosstalk coefficient received by the jth canceller includes the crosstalk coefficients of the Kj ports.
  • each port's crosstalk coefficient includes K coefficients. Therefore, the cancellation module can drive each canceller to multiply the received K-channel crosstalk signals by the corresponding K coefficients of each port, and then superimpose the obtained K products to obtain one pre-processing. After the signal. Wherein, after the jth canceller preprocesses the received Kj crosstalk signal, the Kj path preprocessed signal can be obtained.
  • the crosstalk factor received by the canceller 1 is H1, which is a 16x64 matrix. Then, when the canceller 1 receives 16 crosstalk information through 16 ports, and receives 48 crosstalk signals sent by the other 3 cancellers through the Ethernet interface, the 64 crosstalk signals can be respectively associated with the H1 in the H1. Each line coefficient is multiplied separately, and then the product is superimposed, and finally 16 preprocessed signals can be obtained.
  • the crosstalk cancellation method provided by the embodiment of the present invention can directly increase the number of cancelers in the cancellation module, thereby achieving the crosstalk cancellation.
  • Capacity expansion of device processing capabilities For example, if the signaling port of the central office device is originally 48, the canceling module can be configured with three 16 ⁇ 64 cancellers to preprocess the crosstalk signal of the 48 ports; when the central office device When the number of ports is increased to 64, a 16 ⁇ 64 canceller can be added to the cancellation module to implement preprocessing of the 64-port crosstalk signal. Therefore, when the processing capability of the crosstalk canceling device is expanded, there is no need to customize a new chip, and the expansion is relatively simple, which greatly improves the flexibility of use of the crosstalk canceling device.
  • step 206 can be deleted as appropriate.
  • anyone skilled in the art can be within the technical scope of the present disclosure. The method of easily thinking about changes should be covered within the scope of protection of the present application, and therefore will not be described again.
  • the embodiment of the present invention provides a crosstalk cancellation method, in which a computing center deployed at a remote end can calculate a crosstalk coefficient according to a status parameter and a channel physical parameter reported by a baseband chip, and can perform the crosstalk.
  • the coefficient is delivered to the offset module deployed in the carrier.
  • the crosstalk cancellation method provided by the embodiment of the present invention can perform crosstalk cancellation processing on the local end devices of different port numbers, and the flexibility of the crosstalk cancellation method is more flexible than that of the computing system of the present invention. high.
  • Figure 4-1 is a schematic structural diagram of a crosstalk cancellation system according to an embodiment of the present invention.
  • the crosstalk cancellation system may include: M cascaded as shown in Figure 2-1 or Figure 2-2.
  • the computing centers in any two crosstalk canceling devices 00 are connected to each other through a fourth network interface.
  • the fourth network interface can be an Ethernet interface.
  • the computing center in each crosstalk cancellation device 00 is further configured to separately transmit the received channel physical parameters to the computing centers in the other M-1 crosstalk canceling devices through the fourth network interface.
  • the cancellation modules of any two crosstalk cancellation devices 00 are connected to each other through a third network interface, and the cancellation module in each of the crosstalk cancellation devices 00 is further configured to separately send the received crosstalk signals to the other through the third network interface.
  • M-1 crosstalk cancellation means in the cancellation device 00 are connected to each other through a third network interface, and the cancellation module in each of the crosstalk cancellation devices 00 is further configured to separately send the received crosstalk signals to the other through the third network interface.
  • the cancellation module in each crosstalk cancellation device may be deployed in different central office devices, and the operation centers in the respective crosstalk cancellation devices may be deployed in different central office servers, or Can be deployed in the cloud server.
  • one of the at least two crosstalk canceling devices may be determined as one of the master crosstalk canceling devices, and the other crosstalk canceling device is used as the slave crosstalk canceling device, and the master crosstalk canceling device controls the signal interaction between the respective crosstalk canceling devices.
  • the crosstalk canceling system includes two crosstalk canceling devices: a crosstalk canceling device 1 and a crosstalk canceling device 2.
  • the crosstalk canceling device 1 is a master crosstalk canceling device
  • the crosstalk canceling device 2 is a slave crosstalk canceling device
  • the computing center 1 in the crosstalk canceling device 1 passes through the fourth network interface and the computing center 2 in the crosstalk canceling device 2.
  • the cancellation module 1 in the crosstalk cancellation device 1 is connected to the cancellation module 2 in the crosstalk cancellation device 2 via a third network interface.
  • the embodiment of the present invention provides a crosstalk cancellation system, which may include multiple cascaded crosstalk cancellation devices, and the crosstalk cancellation system has higher crosstalk cancellation capability. Moreover, since the cancellation module in each crosstalk cancellation device can be deployed in different central office devices, the crosstalk cancellation system can preprocess the crosstalk signal between different central office devices, further improving the crosstalk signal. Processing effect.
  • An embodiment of the present invention provides another crosstalk cancellation method, which can be applied to the system shown in FIG. 4-1.
  • the method may include:
  • Step 301 Each crosstalk cancellation device receives a status parameter and a channel physical parameter reported by the baseband chip.
  • the computing center in each crosstalk canceling device can receive the state parameters and channel physical parameters reported by the baseband chip through the second network interface.
  • the state parameter and the channel physical parameter For the specific process of receiving the state parameter and the channel physical parameter, reference may be made to the foregoing step 202 to step 204, which is not repeatedly described in the embodiment of the present invention.
  • Step 302 The computing center in the main crosstalk canceling device sends an interactive command to the computing centers of the other slave crosstalk canceling devices.
  • the operation center of the main control crosstalk canceling device may separately send an interaction instruction to the operation center of the other slave crosstalk canceling device through the fourth network interface, and the interaction is performed.
  • the instruction is used to indicate that each crosstalk canceling device sends a channel physical parameter to each other.
  • Step 303 The computing center in each crosstalk canceling device separately transmits channel physical parameters to the computing centers of the other crosstalk canceling devices.
  • the received letter After receiving the interactive instruction from the computing center in the crosstalk canceling device, the received letter can be received.
  • the track physical parameters are respectively sent to the computing centers in the other crosstalk canceling devices through the fourth network interface.
  • the computing center in the active crosstalk canceling device may also send the channel physical parameters received through the second network interface to the computing center in the other slave crosstalk canceling device through the fourth network interface.
  • the foregoing steps 301 to 303 may be implemented in another manner: when the primary crosstalk cancellation device sends a channel physical parameter acquisition request to its corresponding baseband chip,
  • the channel physical parameter acquisition request carries an interaction instruction, and the channel physical parameter acquisition request carrying the interaction instruction is separately sent to other slave crosstalk cancellation devices.
  • the computing center in the slave crosstalk canceling device may send a channel physical parameter acquisition request to the baseband chip corresponding to the device according to the channel physical parameter acquisition request. After the computing center in each crosstalk canceling device receives the channel physical parameters reported by the baseband chip, the channel physical parameters can be forwarded to each other.
  • Step 304 The computing center in each crosstalk canceling device calculates a crosstalk coefficient according to the channel physical parameter.
  • the crosstalk coefficient can be calculated according to the channel physical parameter.
  • the specific process of calculating the crosstalk coefficient refer to the foregoing step 205, which is not repeatedly described in the embodiment of the present invention.
  • Step 305 The computing center in each crosstalk canceling device sends the crosstalk coefficient to the cancellation module.
  • step 206 For the specific process of issuing the crosstalk coefficient, refer to step 206 and step 207 above.
  • Step 306 The cancellation module in each crosstalk cancellation device transmits a crosstalk signal to the cancellation modules of the other crosstalk cancellation devices.
  • the canceling module in each crosstalk canceling device After receiving the crosstalk coefficient sent by the computing center, the canceling module in each crosstalk canceling device also needs to separately send the crosstalk signal received by the module to the canceling module in the other crosstalk canceling device, and receive the offset in the other crosstalk canceling device.
  • the crosstalk signal sent by the module Each of the cancellation modules can preprocess the crosstalk signal of the module according to the crosstalk coefficient and the crosstalk signal sent by the other cancellation module. For the specific process of the pre-processing, reference may be made to the foregoing step 209, which is not repeatedly described in the embodiment of the present invention.
  • the embodiment of the present invention provides a crosstalk cancellation method, which can preprocess a crosstalk signal between multiple central office devices, and further improves the processing effect on the crosstalk signal.
  • FIG. 5 is a schematic structural diagram of a computing center according to an embodiment of the present invention.
  • the computing center may include:
  • the first receiving unit 401 is configured to receive the port information reported by the cancellation module by using the first network interface, where the cancellation module includes L cancellers, where the port information includes each of the L cancelers connected to the canceller
  • the identifier of the port which is a positive integer.
  • the second receiving unit 402 is configured to receive the status parameter and the channel physical parameter reported by the baseband chip by using the second network interface.
  • the calculating unit 403 is configured to perform the method shown in step 205 above.
  • the sending unit 404 is configured to send the crosstalk coefficient to the corresponding canceler in the cancellation module according to the port information.
  • the calculating unit 403 is specifically configured to: determine, according to the state parameter, the total number of ports currently on the line K;
  • the crosstalk coefficients of the K ports are calculated.
  • the sending unit 404 is specifically configured to: send the crosstalk coefficients of the K ports to the canceller connected to the K ports according to the port information.
  • the sending unit 404 is specifically configured to perform the method shown in the foregoing steps 2071 to 2073.
  • the sending unit 404 is configured to: perform packet encapsulation on the crosstalk coefficient of each port of the K ports; and send the encapsulated packet to the canceller connected to the K ports.
  • the first receiving unit 401 is specifically configured to:
  • the embodiment of the present invention provides a computing center, which can be deployed and deployed in The offset module of the different physical locations and the baseband chip perform signal interaction, and can calculate the crosstalk coefficient according to the channel physical parameters reported by the baseband chip, and send the crosstalk coefficient to the cancellation module.
  • the computing scale of the computing center can be expanded by allocating more computing resources to the computing center.
  • the expansion method does not need to customize a new chip, and the expansion is relatively simple. It can flexibly perform crosstalk cancellation processing on the number of local end devices of different ports.
  • FIG. 6 is a schematic structural diagram of a cancellation module according to an embodiment of the present invention.
  • the cancellation module may include:
  • the sending unit 501 is configured to execute the method shown in step 201 above.
  • the receiving unit 502 is configured to receive, by the J cancellers, a crosstalk coefficient of the K ports sent by the computing center, where the J cancellers are cancellers connected to the K ports, where the J is less than or equal to L. Integer.
  • the processing unit 503 is configured to drive each of the J cancelers, and preprocess the received at least one crosstalk signal according to the crosstalk coefficient.
  • processing unit 503 is specifically configured to perform the methods shown in the foregoing steps 2091 and 2092.
  • the receiving unit 502 is specifically configured to:
  • the coefficient configuration instruction is used to indicate that the number of ports of the crosstalk coefficient to be sent is K; sending a response instruction to the operation center; receiving the operation center through the J cancellers The crosstalk coefficient of each of the K ports; when it is determined that the crosstalk coefficients of all K ports are received, a stop command is sent to the computing center.
  • the receiving unit 502 is configured to: receive, by using J cancellers, the encapsulated packet sent by the computing center; decapsulate the packet to obtain a crosstalk coefficient of the K ports.
  • the embodiment of the present invention provides a cancellation module, where the cancellation module includes at least one canceller, and the cancellation module can perform signal interaction with a computing center deployed at different physical locations, and can be The crosstalk coefficient is preprocessed for the received crosstalk signal.
  • the offset of the offset module can be expanded by increasing the number of cancellers in the cancellation module. The expansion method does not need to customize a new chip, and the expansion is simple and flexible. The number of port devices is subjected to crosstalk cancellation processing.
  • 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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Abstract

本申请提供了一种串扰抵消方法、装置及系统，涉及通信技术领域，该串扰抵消装置可以包括：部署于不同物理位置的运算中心和抵消模块。该抵消模块可以包括：至少一个抵消器。该运算中心可以通过第一网络接口与该抵消模块连接，并通过第二网络接口与基带芯片连接。因此，当局端设备的信号收发端口数量增加时，通过增加该抵消模块中抵消器的数量，以及为该运算中心分配更多的计算资源，即可实现对该串扰抵消装置的串扰抵消规模的扩容，该扩容方法无需再定制新的芯片，扩容较为简单，因此能够灵活对不同端口数量的局端设备进行串扰抵消处理。

Description

串扰抵消方法、装置及系统 技术领域
本发明涉及通信技术领域，特别涉及一种串扰抵消方法、装置及系统。
背景技术
在数字用户线路(英文：Digital Subscriber Line；简称：DSL)中，用于消除局端设备与用户前端装置(英文：Customer Premises Equipment；简称：CPE)之间串音干扰的串扰抵消装置一般为矢量化控制实体(英文：Vectoring Control Entity；简称：VCE)芯片。该VCE芯片一般设置在DSL的局端设备，例如，数字用户线路接入复用器(英文：Digital Subscriber Line Access Multiplexer；简称：DSLAM)中。
目前，VCE芯片主要包括控制模块和串扰抵消模块。其中，控制模块用于根据基带芯片上报的信道物理参数，对局端设备和CPE之间的信道串扰进行计算，并生成串扰系数；串扰抵消模块用于接收局端设备中多个端口的串扰信号，并根据该串扰系数对该串扰信号进行预处理。
但是，相关技术中VCE芯片的容量一般为固定容量，只能对一定数量端口的串扰信号进行处理，该VCE芯片的使用灵活性较低。
发明内容
为了解决相关技术中VCE芯片使用灵活性较低的问题，本申请提供了一种串扰抵消方法、装置及系统。所述技术方案如下：
第一方面，提供了一种串扰抵消装置，该装置可以包括：部署于不同物理位置的运算中心和抵消模块。例如该运算中心可以部署于云服务器或者局端服 务器中，该抵消模块可以部署于局端设备中。其中，该抵消模块可以包括：L个抵消器，该L为正整数。该运算中心可以通过第一网络接口与该抵消模块连接，并通过第二网络接口与基带芯片连接；该运算中心用于根据基带芯片上报的状态参数和信道物理参数，计算串扰系数，并通过第一网络接口向该抵消模块中的抵消器下发该串扰系数。该抵消模块中的每个抵消器与至少一个端口相连，每个抵消器用于可以接收到的串扰系数，对通过该至少一个端口接收到的串扰信号进行预处理。其中，该第一网络接口、该第二网络接口和该第三网络接口可以均为以太网接口。
本发明实施例所示的串扰抵消装置，将运算中心和抵消模块部署在不同的物理位置，并对该抵消模块进行了模块化设计，因此当该局端设备的信号收发端口数量增加时，通过增加该抵消模块中抵消器的数量，以及为该运算中心分配更多的计算资源，即可实现对该串扰抵消装置串扰抵消规模的扩容，该扩容方法无需再定制新的芯片，扩容较为简单。
可选的，该抵消模块中所包括的抵消器的数量可以大于1，此时该L个抵消器中任意两个抵消器之间通过第三网络接口互相连接。该L个抵消器中第i个抵消器与Ni个端口相连，该第i个抵消器用于：通过该Ni个端口接收Ni路串扰信号，将接收到的该Ni路串扰信号通过该第三网络接口分别发送至其他L-1个抵消器，以及根据该串扰系数和其他L-1个抵消器发送的串扰信号，对该Ni路串扰信号进行预处理。
该抵消模块为串扰抵消装置中的硬件模块，且该抵消模块中的每个抵消器能够以芯片的形式配置在局端设备中。通过对该硬件模块的模块化设计，使得该抵消模块中抵消器的数量便于调整，从而使得该抵消模块的串扰抵消能力可调，提高了该抵消模块的使用灵活性。
可选的，该运算中心可以包括：状态控制单元和至少一个系数运算单元。该状态控制单元，用于接收该基带芯片上报的状态参数和信道物理参数，并根据该状态参数，确定串扰系数计算模型；每个系数运算单元，用于在该状态控 制单元的指示下，根据该串扰系数计算模型，对该信道物理参数进行计算，得到多个端口或者多个子载波的串扰系数。
本发明实施例所示的方案中，由于对该运算中心的系数运算单元进行了分布式部署，因此通过增加运算中心中系数运算单元的数量，也即是，为该运算中心分配更多的处理单元，即可实现对该串扰抵消装置运算规模的扩容。
第二方面，提供了一种串扰抵消系统，该系统可以包括：M个级联的串扰抵消装置，每个串扰抵消装置可以为第一方面所示的串扰抵消装置，该M为大于1的整数。
其中，任意两个串扰抵消装置中的运算中心通过第四网络接口互相连接，每个该串扰抵消装置中的运算中心，还用于将接收到的信道物理参数通过该第四网络接口分别发送至其他M-1个串扰抵消装置中的运算中心；任意两个串扰抵消装置中的抵消模块通过第三网络接口互相连接，每个该串扰抵消装置中的抵消模块，还用于将接收到的串扰信号通过该第三网络接口分别发送至其他M-1个串扰抵消装置中的抵消模块。
本发明实施例所示的方案中，通过将多个串扰抵消装置进行级联组成串扰抵消系统，可以进一步提高该串扰抵消系统的处理能力。并且，由于其中每个串扰抵消装置中的抵消模块可以部署于不同的局端设备中，因此通过该串扰抵消系统可以对不同局端设备之间的串扰信号进行预处理，进一步改善了对串扰信号的处理效果。
第三方面，提供了一种串扰抵消方法，该方法包括：
运算中心通过第一网络接口接收抵消模块上报的端口信息，其中，该抵消模块包括L个抵消器，该端口信息中包括该L个抵消器中每个抵消器所连接的端口的标识，该L为正整数；
之后，该运算中心可以通过第二网络接口接收基带芯片上报的状态参数和信道物理参数；根据该状态参数和信道物理参数，计算串扰系数，并将该串扰系数下发至该抵消模块中相应的抵消器。
可选的，该运算中心根据该状态参数和信道物理参数，计算串扰系数的过程可以包括：
根据该状态参数确定当前上线的端口总数K；
根据该状态参数和信道物理参数，计算K个端口的串扰系数；
相应的，运算中心根据该端口信息，将该串扰系数下发至该抵消模块中相应的抵消器的过程可以包括：
根据该端口信息，将该K个端口的串扰系数分别下发至与该K个端口相连的抵消器。
进一步的，该运算中心根据该端口信息，将该K个端口的串扰系数分别下发至与该K个端口相连的抵消器可以包括：
向该抵消模块下发系数配置指令，该系数配置指令用于指示待发送的串扰系数的端口个数为K；当运算中心接收到该抵消模块发送的响应指令时，可以通过第一网络接口向与该K个端口相连的抵消器循环下发该K个端口中每个端口的串扰系数，直至接收到该抵消模块发送的停止指令。该停止指令是该抵消模块在确定接收到所有K个端口的串扰系数后发送的。
通过循环发送串扰系数，可以减少该运算中心与抵消模块之间交互消息的数量，提高该串扰系数的发送效率。
可选的，该运算中心还可以对该K个端口中每个端口的串扰系数进行报文封装，然后再向与该K个端口相连的抵消器发送封装后的报文。将该串扰系数进行报文封装后再发送至抵消器，可以减少发送的数据量，提高串扰系数的发送效率。
可选的，该运算中心通过第二网络接口接收基带芯片上报的状态参数和信道物理参数的过程可以包括：通过第二网络接口接收基带芯片上报的状态参数；向该基带芯片下发信道物理参数获取请求；接收该基带芯片根据该信道物理参数获取请求上报的信道物理参数。
第四方面，提供了一种串扰抵消方法，该方法可以包括：
抵消模块通过第一网络接口向运算中心上报端口信息，该抵消模块包括L个抵消器，该端口信息中包括该L个抵消器中每个抵消器所连接的端口的标识，该L为正整数；
之后，该抵消模块可以通过J个抵消器接收该运算中心下发的K个端口的串扰系数，并驱动该J个抵消器中的每个抵消器，根据该串扰系数，对接收到的至少一路串扰信号进行预处理。其中，该J个抵消器为与该K个端口相连的抵消器，该J为小于或等于L的正整数。
可选的，该抵消模块驱动该J个抵消器中的每个抵消器，根据该串扰系数，对接收到的至少一路串扰信号进行预处理的过程可以包括：
当该J大于1时，该抵消模块驱动该J个抵消器中的每个抵消器将接收到的至少一路串扰信号分别发送至其他J-1个抵消器，并驱动该每个抵消器根据该串扰系数以及该其他J-1个抵消器发送的串扰信号，对该至少一路串扰信号进行预处理。
可选的，该抵消模块通过J个抵消器接收运算中心下发的K个端口的串扰系数的过程可以包括：
抵消模块接收运算中心下发的系数配置指令，该系数配置指令用于指示待发送的串扰系数的端口个数为K；然后向该运算中心发送响应指令；之后该抵消模块即可通过该J个抵消器接收该运算中心循环下发的该K个端口中每个端口的串扰系数；当抵消模块确定接收到所有K个端口的串扰系数时，向该运算中心发送停止指令。
可选的，该抵消模块通过J个抵消器接收运算中心下发的K个端口的串扰系数的过程可以包括：
通过J个抵消器接收该运算中心发送的封装后的报文；对该报文进行解封装，得到该K个端口的串扰系数。
第五方面，提供了一种串扰抵消方法，该方法可以应用于如第二方面所示的串扰抵消系统中，该M个级联的串扰抵消装置中包括一个主控串扰抵消装 置，以及M-1个从控串扰抵消装置，该方法包括：
每个串扰抵消装置接收基带芯片上报的状态参数和信道物理参数；
主控串扰抵消装置中的运算中心向其他M-1个从控串扰抵消装置中的运算中心分别发送交互指令；
每个串扰抵消装置中的运算中心根据该交互指令，向其他M-1个串扰抵消装置的运算中心分别发送信道物理参数；
每个串扰抵消装置中的运算中心根据接收到的信道物理参数计算串扰系数，并将该串扰系数下发至对应的抵消模块；
每个串扰抵消装置中的抵消模块将接收到的串扰信号发分别发送至其他M-1个串扰抵消装置中的抵消模块；
每个串扰抵消装置中的抵消模块根据该串扰系数以及其他M-1个串扰抵消装置发送的串扰信号，对本模块接收到的串扰信号进行预处理。
第六方面，提供了一种运算中心，该运算中心包括：至少一个单元，该至少一个单元可以用于实现上述第三方面提供的串扰抵消方法。
第七方面，提供了一种抵消模块，该抵消模块包括：至少一个单元，该至少一个单元可以用于实现上述第四方面提供的串扰抵消方法。
上述本发明实施例第三到第七方面所获得的技术效果与第一到第二方面中对应的技术手段获得的技术效果近似，在这里不再赘述。
综上所述，本发明实施例提供的技术方案的有益效果是：
本发明实施例提供了一种串扰抵消方法、装置及系统，该串扰抵消装置中的运算中心和抵消模块部署在不同的物理位置中，且该抵消模块中可以包括至少一个抵消器。当该局端设备的信号收发端口数量增加时，通过增加该抵消模块中抵消器的数量，以及为该运算中心分配更多的计算资源，即可实现对该串扰抵消装置的串扰抵消规模的扩容，该扩容方法无需再定制新的芯片，扩容较为简单，因此能够灵活对不同端口数量的局端设备进行串扰抵消处理。
附图说明
图1为本发明实施例提供的一种串扰抵消装置的应用场景示意图；
图2-1是本发明实施例提供的一种串扰抵消装置的结构示意图；
图2-2是本发明实施例提供的另一种串扰抵消装置的结构示意图；
图3-1是本发明实施例提供的一种串扰抵消方法的流程图；
图3-2是本发明实施例提供的一种运算中心发送串扰系数的方法流程图；
图3-3是本发明实施例提供的一种抵消模块对串扰信号进行预处理的方法流程图；
图4-1是本发明实施例提供的一种串扰抵消系统的结构示意图；
图4-2是本发明实施例提供的另一种串扰抵消方法的流程图；
图5是本发明实施例提供的一种运算中心的结构示意图；
图6是本发明实施例提供的一种抵消模块的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
图1为本发明实施例提供的一种串扰抵消装置的应用场景示意图，参考图1，该应用场景中可以包括串扰抵消装置00、基带芯片01以及多个CPE。该基带芯片01部署在局端设备中，该基带芯片01可以通过多个信号收发端口(例如P1、P2和P3)与该多个CPE建立通信连接，用于对局端设备与多个CPE之间的交互信号进行模数转换或者数模转换。该串扰抵消装置00与该基带芯片02连接，用于对基带芯片02模数转换后的信号或者数模转换前的信号进行预处理。其中，该预处理可以包括对基带芯片02模数转换后的信号(即上行信号)进行串扰抵消处理，以及对基带芯片02数模转换前的信号(即下行信号)进行预编码处理。
图2-1是本发明实施例提供的一种串扰抵消装置的结构示意图，参考图1和图2-1，该串扰抵消装置可以包括部署于不同物理位置的运算中心02和抵消模块03。其中，该运算中心02可以部署在云服务器或者局端服务器中，该抵消模块03可以部署在DSL的局端设备中，且该抵消模块03可以包括：L个抵消器，该L为正整数。
该运算中心02可以通过第一网络接口与该抵消模块03连接，以及通过第二网络接口与基带芯片01连接(图2-1中未示出)。该运算中心02用于根据基带芯片01上报的状态参数和信道物理参数，计算串扰系数，并通过该第一网络接口向该抵消模块03中的抵消器下发该串扰系数。
该抵消模块03中的每个抵消器与基带芯片中的至少一个端口相连，用于根据该串扰系数，对通过该至少一个端口接收到的串扰信号进行预处理。其中，每个抵消器所连接的端口是指基带芯片01上的信号收发端口。
综上所述，本发明实施例提供了一种串扰抵消装置，该串扰抵消装置中的运算中心和抵消模块部署在不同的物理位置中，且该抵消模块中可以包括至少一个抵消器。当该局端设备的信号收发端口数量增加时，通过增加该抵消模块中抵消器的数量，以及为该运算中心分配更多的计算资源，即可实现对该串扰抵消装置的串扰抵消规模的扩容，该扩容方法无需再定制新的芯片，扩容较为简单，因此能够灵活对不同端口数量的局端设备进行串扰抵消处理。
进一步的，参考图2-2，该运算中心02可以包括：状态控制单元021和至少一个系数运算单元022。
该状态控制单元021，用于接收该基带芯片上报的状态参数和信道物理参数，并根据该状态参数，确定串扰系数计算模型。
该至少一个系数运算单元022中的每个系数运算单元，用于在该状态控制单元021的指示下，根据该串扰系数计算模型，对该信道物理参数进行计算，得到多个端口或者多个子载波的串扰系数。
在本发明实施例中，该运算中心02所部署的设备(例如局端服务器)中 可以包括多个处理单元，该运算中心中的每个系数运算单元可以与一个处理单元绑定，用于对一定数量的端口或者子载波的串扰系数进行运算。示例的，假设该串扰抵消装置需要对64个端口的串扰信号进行处理，该运算中心中的每个系数运算单元可完成16个端口的串扰系数的运算，则通过4个系数运算单元则可以完成对64个端口的串扰系数的运算；若每个系数运算单元的计算能力是按照子载波的数量衡量的，且该DSL系统中每个信道包括2048个子载波，每个系数运算单元可完成700个子载波的串扰系数的运算，则通过3个系数运算单元即可完成对2048个子载波的串扰系数的运算。
由此，当DSL局端设备中的端口数增加时，可以通过增加运算中心中系数运算单元的数量，也即是，为该运算中心分配更多的处理单元，即可实现对该串扰抵消装置运算规模的扩容。例如，当该局端设备的信号收发端口由64增加至80个时，可以在该运算中心中再增加一个系数运算单元(即为该运算中心再分配一个处理单元)，即可实现对串扰抵消装置运算规模的扩容。该扩容方法较为简单，且无需定制新的芯片，提高了串扰抵消装置的使用灵活性。
可选的，参考图2-2，在本发明实施例中，该L可以为大于1的整数，即该抵消模块03中可以包括多个抵消器031，且该L个抵消器031中任意两个抵消器之间可以通过第三网络接口互相连接。
其中，该L个抵消器中的第i个抵消器可以与Ni个端口相连，该i为小于等于L的正整数，该Ni为正整数。该第i个抵消器用于：通过该Ni个端口接收Ni路串扰信号，将接收到的该Ni路串扰信号通过该第三网络接口分别发送至其他L-1个抵消器，以及根据该串扰系数和其他L-1个抵消器发送的串扰信号，对该Ni路串扰信号进行预处理。因此，该第i个抵消器至少能够处理N个端口对该Ni个端口中每个端口的干扰，其中N满足：
Figure PCTCN2016111372-appb-000001
即N为该抵消模块所连接的端口总数。在本发明实施例中，可以用Ni×N表示该第i个抵消器的规格，即第i个抵消器所连接的端口数为Ni，该第i个抵消器至少可以处理N个端口对该Ni个端口所造成的干扰。
示例的，如图2-1所示，该抵消模块03可以包括四个抵消器，该四个抵消器中的每个抵消器可以与基带芯片中的16个端口相连。因此每个抵消器可以接收到16路串扰信号，并能够将该16路串扰信号通过以太网接口分别发送至其他三个抵消器。同时，每个抵消器还可以接收到其他三个抵消器发送的共48路串扰信号，之后，该每个抵消器即可根据接收到的串扰系数以及该48路串扰信号，对本抵消器接收到的16路串扰信号进行预处理。
在实际应用中，抵消模块中的每个抵消器可以为定制规格的芯片。由于对该串扰抵消装置中的硬件(即抵消模块)进行了模块化设计，因此当局端设备的端口数量增加时，通过增加该抵消模块中抵消器的数量(即叠加更多的芯片)，即可实现对该抵消模块串扰抵消能力的扩容，使得该扩容后的抵消模块能够与该局端设备的端口数量相匹配，从而有效提高了抵消模块以及串扰抵消装置的使用灵活性。
需要说明的是，在实际应用中，若某个抵消器所连接的端口均未上线，则由于该未上线的端口并不会对其他端口的串扰信号造成干扰，因此，在各个抵消器互相发送串扰信号的过程中，可以无需向该连接有未上线端口的抵消器发送串扰信号。示例的，若在图2-1所示的4个抵消器中，抵消器4所连接的16个端口均未上线，则抵消模块03在对串扰信号进行预处理时，可以控制抵消器1至抵消器3互相发送串扰信号，而无需向抵消器4发送串扰信号。
还需要说明的是，在本发明实施例中，该第一至第三网络接口可以均为以太网接口。
还需要说明的是，在实际应用中，参考图2-2，该运算中心02中还可以包括运算适配单元023，该运算适配单元023用于对该运算中心02与抵消模块03之间的交互消息进行适配，以及对运算中心02与基带芯片01之间的交互消息进行适配。
该抵消模块03中还可以包括抵消适配单元032和抵消驱动单元033，该抵消适配单元032用于对抵消模块03与该运算中心02之间的交互消息进行适配， 该抵消驱动单元033用于将接收到的串扰系数配置给各个抵消器031，以及驱动该各个抵消器031。
综上所述，本发明实施例提供了一种串扰抵消装置，该串扰抵消装置中的运算中心和抵消模块部署在不同的物理位置中。其中，该运算中心可以部署在云服务器或者局端服务器中，该抵消模块可以部署在局端设备中，且该抵消模块中可以包括至少一个抵消器。因此当该局端设备的信号收发容量增加时，可以通过增加该抵消模块中抵消器的数量，以及为该运算中心分配更多的计算资源，即可实现对该串扰抵消装置抵消规模的扩容，该扩容方法无需再定制新的芯片，扩容较为简单，能够灵活对不同端口数量的局端设备进行串扰抵消处理。
图3-1是本发明实施例提供的一种串扰抵消方法的流程图，该方法可以应用于如图1所示的应用场景中，参考图3-1，该方法可以包括：
步骤201、抵消模块通过第一网络接口向运算中心发送端口信息。
在本发明实施例中，参考图2-1，该串扰抵消装置中的抵消模块可以包括L个抵消器，其中第i个抵消器与Ni个端口相连。其中i为小于等于L的正整数，Ni为正整数。该第i个抵消器用于对该Ni个端口的收发信号进行预处理，且该第i个抵消器至少能够处理N个端口对该Ni个端口中每个端口的干扰，其中N满足：
Figure PCTCN2016111372-appb-000002
即N为该抵消模块所连接的端口总数。当系统上电时，该抵消模块中的每个抵消器可以通过第一网络接口向运算中心中的状态控制单元上报端口信息，该端口信息中可以包括每个抵消器所连接的端口的标识(例如端口号)。以便该状态控制单元根据该端口信息，确定需要向每个抵消器下发的串扰系数。进一步的，该运算中心还可以根据该端口信息确定抵消模块所连接的端口的总数，进而确定需要计算的串扰系数的最大规模。由于该L个抵消器中第i个抵消器与Ni个端口相连，因此该状态控制单元可以确定该抵消模块所连接的端口总数为N。也即，该抵消模块至少可以处理N个端口之间的相互串扰，因此该状态控制单元可以确定最多需要计算N个端口的串扰系 数。
示例的，假设如图2-1所示，该抵消模块中包括4个抵消器，其中每个抵消器与16个端口相连。该抵消模块在上电时，可以通过以太网接口向该运算中心中的状态控制单元上报端口信息。该端口信息可以如表1所示，其中，抵消器1所连接的端口为1至16号端口，抵消器4所连接的端口为49至64号端口。该4个抵消器中，每个抵消器的规格可以表示为16×64，即每个抵消器所连接的端口数为16，每个抵消器至少可以处理64个端口对该16个端口所造成的干扰。
表1
抵消器 端口号
抵消器1 1-16
抵消器2 17-32
抵消器3 33-48
抵消器4 49-64
步骤202、基带芯片通过第二网络接口向运算中心上报状态参数。
在本发明实施例中，部署在局端设备中的基带芯片用于对各个端口的收发信号进行模数转换或者数模转换。该基带芯片在工作过程中可以包括多种状态，例如OPV1、RPV1或者OPV2等，当该基带芯片的状态发生变化时，即可通过第二网络接口向该运算中心中的状态控制单元上报变化后的状态参数。该状态参数用于指示该基带芯片中当前上线端口中每个端口的状态。示例的，该基带芯片通过以太网接口向该运算中心中的状态控制单元上报的状态参数可以包括：当前上线的K个端口中每个端口的状态。
步骤203、运算中心通过第二网络接口向该基带芯片下发信道物理参数获取请求。
运算中心中的状态控制单元接收到基带芯片上报的状态参数后，即可向该 基带芯片下发信道物理参数获取请求，以便获取该基带芯片上报的信道物理参数。该信道物理参数为用于反映信道状况的参数，具体可以包括信道的增益、频域均衡系数(英文：frequency domain equalize；简称：FEQ)和偏差系数(英文：Error Report Block；简称：ERB)等。
步骤204、基带芯片向该状态控制单元上报信道物理参数。
基带芯片接收到该信道物理参数获取请求后，可以通过第二网络接口向该运算中心中的状态控制单元上报当前的信道物理参数。例如，上报当前信道的增益、FEQ和ERB等参数。
步骤205、根据该状态参数和信道物理参数，计算串扰系数。
运算中心中的状态控制单元接收到该基带芯片上报的信道物理参数后，可以根据基带芯片之前上报的状态参数，确定串扰系数计算模型，并且可以根据基带芯片的状态，计算出当前上线的端口总数K，该K为小于或等于N的正整数。因此该状态控制单元可以确定仅需计算K个端口的串扰系数。之后，该状态控制单元即可将该接收到信道物理参数发送至系数运算单元，并控制该系数运算单元按照该串扰系数计算模型，对该信道物理参数进行计算，从而得到K个端口中每个端口的串扰系数。由于该K个端口中每个端口的收发信号均会受到其他K-1个端口的信号以及自身的干扰，且每个端口的收发信号共包括M个子载波的信号。因此，该系数运算单元计算得到的串扰系数可以用一个K×K×M的三维矩阵来表示。其中，对于M个子载波中第K个子载波上的信号，该K个端口的串扰系数可以表示为：
Figure PCTCN2016111372-appb-000003
其中，hij为用于抵消第j个端口对第i个受干扰端口(victim端口)所造成的干扰的串扰系数。例如，h12为用于抵消2号端口对1号端口所造成的干 扰的串扰系数。该矩阵中的第i行的K个系数即为，用于抵消K个端口中每个端口对该第i个受干扰端口所造成的干扰的串扰系数。也即是，每个受干扰端口的串扰系数可以包括K个系数。
示例的，若运算中心根据基带芯片的状态，计算出当前上线的端口总数K＝64，该抵消模块所连接的端口总数N＝64，则该运算中心可以进一步确定需要计算K＝64个端口的串扰系数；或者，若运算中心计算出当前上线的端口总数K＝48，则该运算中心可以确定仅需计算K＝48个端口的串扰系数。
步骤206、根据抵消模块上报的端口信息，将该K个端口的串扰系数划分为J组串扰子系数。
运算中心计算得到串扰系数后，可以根据该L个抵消器中每个抵消器所连接的端口的标识，确定与该K个端口所连接的抵消器的个数J，然后将该K个端口的串扰系数划分为J组串扰子系数。其中第j组串扰子系数包括第j个抵消子模块所连接的Kj个端口的串扰系数，j为大于等于1且小于等于J的整数。
示例的，假设该系数运算单元计算得到的K＝64个端口的串扰系数如公式(1)所示，且该抵消模块上报的端口信息如表1所示，则该状态控制单元可以确定该抵消模块中的4个抵消器与该64个端口相连，因此可以将该公式(1)所示的串扰系数划分为4组串扰子系数。其中，对应于抵消器1的第一组串扰子系数H1可以包括该公式(1)所示的串扰系数中第1至16行的串扰系数，对应于抵消器4的第四组串扰子系数H4可以包括该公式(1)所示的串扰系数中第49至64行的串扰系数。
或者，若当前上线的端口总数K＝48，则由于该运算中心仅计算了K＝48个端口的串扰系数，且该4个抵消器中，抵消器1至3与该48个端口连接，因此运算中心可以将该48个端口的串扰系数划分为3组串扰子系数。
步骤207、将串扰系数中每组串扰子系数通过第一网络接口下发至对应的抵消器。
进一步的，状态控制单元可以将该J组串扰子系数分别下发至该J个抵消 器中对应的抵消器。在本发明实施例中，为了提高发送的效率，压缩发送的数据量，该串扰系数的发送流程可以如图3-2所示，包括：
步骤2071、状态控制单元对每个端口的串扰系数进行报文封装。
为了提高系数下发的效率，该状态控制单元可以按照预设的报文结构对每个端口(也可以称为受干扰端口)的串扰系数分别进行封装。若每个报文的最大长度为MaxB字节(例如1500字节)，每个子载波的串扰系数位宽为n字节，每个端口共包括M个子载波，则对每个受干扰端口的串扰系数中的每个系数进行封装时，所需的报文个数可以为:n×M/MaxB。又由于每个受干扰端口的串扰系数中可以包括K个系数，因此，对该每个受干扰端口的串扰系数进行封装时一共需要的报文个数可以为：K×(n×M/MaxB)。
在本发明实施例中，每个报文的报文结构可以为：[受干扰端口号][干扰端口号][分片索引][系数格式][系数]；该报文结构中的系数格式是指每个串扰系数的格式，该串扰系数的格式可以通过载荷(英文：payload)格式进行定义，该系数格式一般可以为[虚部][实部][指数]。
通过系数格式的定义，可以在不影响精度的情况下，尽量减少传输数据量。进一步的，该系数格式中还可以对系数的位宽和指数的复用进行定义。此时，该系数的格式可以为[虚部][实部][指数]，该系数格式中还可以包括管理字段：[系数位宽][指数复用]。其中系数位宽是指定义系数中虚部和实部的位宽，指数复用是指定义若干个子载波的系数的指数进行复用。比如可以定义该虚部和实部的系数位宽为10，可以定义4个子载波的系数复用一个指数。由于相邻的子载波的指数的数量级一般相同或者相近，因此可以使多个相邻的子载波共用一个指数。由此可以进一步减少需要传输的数据量。
步骤2072、状态控制单元向抵消模块下发系数配置指令。
状态控制单元完成报文封装后，可以向抵消器下发系数配置指令，该系数配置指令中可以包括该状态控制单元将下发的串扰系数的端口数，以指示该抵消模块开始进行系数配置，且该系数配置指令可以用于指示待发送的串扰系数 的端口个数为K。示例的，该系数配置指令可以用于指示该状态控制单元将下发64个端口的串扰系数。
步骤2073、状态控制单元接收到响应指令时，开始循环发送报文。
抵消模块接收到系数配置指令后，可以向状态控制单元发送响应指令，状态控制单元接收到该响应指令后，可以通过第一网络接口将封装有该K个端口的串扰系数的报文依次下发至该J个抵消器中的每个抵消器，并且该状态控制单元可以向该J个抵消器循环发送该K个端口的串扰系数，直至接收到抵消模块发送的停止指令。也即是，该状态控制单元将第一至第K个端口的串扰系数依次发送至对应的抵消器后，若没有接收到停止指令，则可以继续依次发送该第一至第K个端口的串扰系数。由于每个端口的串扰系数封装在
Figure PCTCN2016111372-appb-000004
个报文中，因此该状态控制单元下发每个端口的串扰系数时，需要发送
Figure PCTCN2016111372-appb-000005
个报文，其中
Figure PCTCN2016111372-appb-000006
表示向上取整。
示例的，该状态控制单元可以先向抵消器1依次下发1至16号端口的串扰系数，然后再向抵消器2依次下发17至第32号端口的串扰系数，再向抵消器3依次下发33至48号端口的串扰系数，最后向抵消器4依次下发49至64号端口的串扰系数。该状态控制单元完成所有K个端口的串扰系数的报文的发送后，若未接收到抵消模块上报的停止指令，则可以从1号端口开始，继续以报文的形式循环下发各个端口的串扰系数。
步骤208、当抵消模块接收到所有K个端口的串扰系数时，向该运算中心发送停止指令。
在本发明实施例中，由于状态控制单元在发送串扰系数之前，向抵消模块下发了系数配置指令，抵消模块根据该系数配置指令可以确定需要接收的串扰系数的端口个数为K。因此，抵消模块在接收串扰系数的过程中，可以实时检测该K个端口的串扰系数是否已经正常接收。当抵消模块确定接收到所有K个端口的串扰系数后，可以向该运算中心发送停止指令。若该运算模块运算中心向所有K个端口发送完一轮串扰系数后，抵消模块检测到该K个端口中存 在若干个端口的串扰系数未能正常接收，则不会向该运算中心发送停止指令。此时该运算中心可以再次向该抵消模块依次下发该K个端口的串扰系数，直至接收到该抵消模块发送的停止指令。通过该循环发送的方法发送串扰系数的过程中，抵消模块与运算中心之间交互消息的数量较少，可以提高串扰系数的下发效率。
步骤209、抵消模块根据接收到的串扰系数，对K个端口的串扰信号进行预处理。
在本发明实施例中，由于抵消模块中的J个抵消器实际接收到的为状态控制单元发送的封装有串扰系数的报文，因此该抵消模块可以按照预设的报文结构，对该接收到的报文进行解封装，以获取到封装在该报文内的串扰系数。之后，该抵消模块即可根据该串扰系数，对接收到K路串扰信号进行预处理。具体的，参考图3-3，该抵消模块对串扰信号进行预处理的过程具体可以包括：
步骤2091、抵消模块驱动J个抵消器中的每个抵消器将接收到的该至少一路串扰信号分别发送至其他J-1个抵消器。
在本发明实施例中，该J个抵消器中的每个抵消器分别与至少一个端口相连，能够通过该至少一个端口接收至少一路串扰信息。由于当J大于1时，该至少一路串扰信号还会受到其他J-1个抵消器所接收到的串扰信号的干扰，因此为了使得每个抵消器能够对接收到的至少一路串扰信号进行预处理，当J大于1时，该抵消模块还可以驱动每个抵消器将接收到的该至少一路串扰信号分别发送至其他J-1个抵消器。因此，每个抵消器还可以接收其他J-1个抵消器所发送的串扰信号。其中，第j个抵消器可以通过Kj个端口接收到Kj路串扰信号，因此该第j个抵消器可以将该Kj路串扰信号通过第三网络接口分别发送至其他J-1个抵消器，并接收其他J-1个抵消器所发送的共(K-Kj)路串扰信号。故每个抵消器一共可以接收到K路串扰信号。此外，当J等于1时，该一个抵消器可以直接对接收到的串扰信号进行预处理。
示例的，对于如图2-1所示的抵消模块，该抵消模块可以驱动抵消器1将 接收到的16路串扰信号分别发送至抵消器2至抵消器4。同样的，该抵消器1也可以接收到抵消器2至抵消器4发送的共48路串扰信号。
步骤2092、抵消模块驱动每个抵消器根据接收到的串扰系数以及其他J-1个抵消器发送的串扰信号，对该至少一路串扰信号进行预处理。
根据上述步骤206和步骤207可知，第j个抵消器所接收到的第j组串扰子系数中包括Kj个端口的串扰系数。其中，每个端口的串扰系数中又包括K个系数。因此，该抵消模块可以驱动每个抵消器将接收到的K路串扰信号，分别与该每个端口的K个系数对应相乘，然后将得到的K个乘积进行叠加，即可得到一路预处理后的信号。其中，第j个抵消器对接收到的Kj路串扰信号进行预处理后，可以得到Kj路预处理后的信号。
示例的，假设抵消器1接收到的串扰子系数为H1，该H1为16×64的矩阵。则当该抵消器1通过16个端口接收到16路串扰信息，并通过以太网接口接收到其他3个抵消器发送的48路串扰信号后，可以将该64路串扰信号分别与该H1中的每一行系数分别对应相乘，然后将乘积叠加，最终可以得到16路预处理后的信号。
根据上述分析可知，当该DSL系统中接入层的端口数量增加时，采用本发明实施例提供的串扰抵消方法，可以直接在该抵消模块中增加抵消器的数量，即可实现对该串扰抵消装置处理能力的扩容。例如，假设局端设备的信号收发端口原来为48个，则该抵消模块中可以配置三个规格为16×64的抵消器对该48个端口的串扰信号进行预处理；当该局端设备的端口数增加至64个时，可以在该抵消模块中再增加一个规格为16×64的抵消器，即可实现对该64个端口的串扰信号的预处理。因此对该串扰抵消装置的处理能力进行扩容时，无需定制新的芯片，扩容较为简单，极大提高了串扰抵消装置的使用灵活性。
需要说明的是，本发明实施例提供的串扰抵消方法的步骤的先后顺序可以进行适当调整，步骤也可以根据情况进行相应增减。例如步骤206可以根据情况进行删除。任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可 轻易想到变化的方法，都应涵盖在本申请的保护范围之内，因此不再赘述。
综上所述，本发明实施例提供了一种串扰抵消方法，在该方法中，部署在远端的运算中心可以根据基带芯片上报的状态参数和信道物理参数计算串扰系数，并可以将该串扰系数下发至部署在运营商端中的抵消模块。由于该运算中心的计算能力和抵消模块的抵消能力可以灵活扩展，因此本发明实施例提供的该串扰抵消方法可以对不同端口数量的局端设备进行串扰抵消处理，该串扰抵消方法的灵活性较高。
此外，为描述的方便和简洁，上述图1、图2-1和图2-2所示的装置、模块和单元的具体工作过程，可以参考图3-1至图3-3所示实施例中的对应过程，在此不再赘述。
图4-1是本发明实施例提供的一种串扰抵消系统的结构示意图，如图4-1所示，该串扰抵消系统可以包括：M个级联的如图2-1或者图2-2所示的串扰抵消装置，该M为大于1的整数。
其中，任意两个串扰抵消装置00中的运算中心通过第四网络接口互相连接。该第四网络接口可以为以太网接口。每个串扰抵消装置00中的运算中心，还用于将接收到的信道物理参数通过该第四网络接口分别发送至其他M-1个串扰抵消装置中的运算中心。
任意两个串扰抵消装置00中的抵消模块通过第三网络接口互相连接，每个该串扰抵消装置00中的抵消模块，还用于将接收到的串扰信号通过该第三网络接口分别发送至其他M-1个串扰抵消装置00中的抵消模块。
对于多个串扰抵消装置级联的场景，每个串扰抵消装置中的抵消模块可以部署于不同的局端设备中，各个串扰抵消装置中的运算中心可以部署于不同的局端服务器中，或者也可以均部署于云服务器中。进一步的，可以在该至少两个串扰抵消装置中确定一个主控串扰抵消装置，其他串扰抵消装置作为从控串扰抵消装置，由该主控串扰抵消装置控制各个串扰抵消装置之间的信号交互。
示例的，如图4-1所示，假设串扰抵消系统中包括两个串扰抵消装置：串扰抵消装置1和串扰抵消装置2。其中，串扰抵消装置1为主控串扰抵消装置，串扰抵消装置2为从控串扰抵消装置，且该串扰抵消装置1中的运算中心1通过第四网络接口与串扰抵消装置2中的运算中心2相连，串扰抵消装置1中的抵消模块1通过第三网络接口与该串扰抵消装置2中的抵消模块2相连。
综上所述，本发明实施例提供了一种串扰抵消系统，该系统中可以包括多个级联的串扰抵消装置，该串扰抵消系统的串扰抵消能力更高。并且，由于其中每个串扰抵消装置中的抵消模块可以部署于不同的局端设备中，因此通过该串扰抵消系统可以对不同局端设备之间的串扰信号进行预处理，进一步改善了对串扰信号的处理效果。
本发明实施例提供了另一种串扰抵消方法，该方法可以应用于如图4-1所示的系统中，参考图4-2，该方法可以包括：
步骤301、每个串扰抵消装置分别接收基带芯片上报的状态参数和信道物理参数。
每个串扰抵消装置中的运算中心可以通过第二网络接口接收基带芯片上报的状态参数和信道物理参数。该接收状态参数和信道物理参数的具体过程可以参考上述步骤202至步骤204，本发明实施例对此不再赘述。
步骤302、主控串扰抵消装置中的运算中心向其他从控串扰抵消装置的运算中心分别发送交互指令。
在本发明实施例中，主控串扰抵消装置的运算中心接收到基带芯片上报的信道物理参数后，即可通过第四网络接口向其他从控串扰抵消装置的运算中心分别发送交互指令，该交互指令用于指示各个串扰抵消装置之间互相发送信道物理参数。
步骤303、每个串扰抵消装置中的运算中心向其他串扰抵消装置的运算中心分别发送信道物理参数。
从控串扰抵消装置中的运算中心接收到该交互指令后，可以将接收到的信 道物理参数通过第四网络接口分别发送至其他串扰抵消装置中的运算中心。同样的，主控串扰抵消装置中的运算中心也可以将通过第二网络接口接收到的信道物理参数，通过第四网络接口分别发送至其他从控串扰抵消装置中的运算中心。
需要说明的是，在实际应用中，上述步骤301至步骤303还可以通过另一种方式实现：主控串扰抵消装置在向其对应的基带芯片下发信道物理参数获取请求时，还可以在该信道物理参数获取请求中携带交互指令，并将该携带有交互指令的信道物理参数获取请求分别发送至其他从控串扰抵消装置。从控串扰抵消装置中的运算中心可以根据该信道物理参数获取请求，再向本装置对应的基带芯片下发信道物理参数获取请求。当各个串扰抵消装置中的运算中心接收到基带芯片上报的信道物理参数后，即可互相转发该信道物理参数。
步骤304、每个串扰抵消装置中的运算中心根据信道物理参数计算串扰系数。
各个串扰抵消装置中的运算中心接收到其他串扰抵消装置发送的信道物理参数后，可以根据该信道物理参数对串扰系数进行计算。该计算串扰系数的具体过程可以参考上述步骤205，本发明实施例对此不再赘述。
步骤305、每个串扰抵消装置中的运算中心将串扰系数下发至抵消模块。
该下发串扰系数的具体过程可以参考上述步骤206和步骤207。
步骤306、每个串扰抵消装置中的抵消模块向其他串扰抵消装置的抵消模块分别发送串扰信号。
各个串扰抵消装置中的抵消模块接收到运算中心下发的串扰系数后，还需要将本模块接收到的串扰信号分别发送至其他串扰抵消装置中的抵消模块，以及接收其他串扰抵消装置中的抵消模块所发送的串扰信号。使得每个抵消模块可以根据该串扰系数以及其他抵消模块发送的串扰信号，对本模块的串扰信号进行预处理。该预处理的具体过程可以参考上述步骤209，本发明实施例对此不再赘述。
综上所述，本发明实施例提供了一种串扰抵消方法，该方法能够对多个局端设备之间的串扰信号进行预处理，进一步改善了对串扰信号的处理效果。
图5是本发明实施例提供的一种运算中心的结构示意图，参考图5，该运算中心可以包括：
第一接收单元401，用于通过第一网络接口接收抵消模块上报的端口信息，其中，该抵消模块包括L个抵消器，该端口信息中包括该L个抵消器中每个抵消器所连接的端口的标识，该L为正整数。
第二接收单元402，用于通过第二网络接口接收基带芯片上报的状态参数和信道物理参数。
计算单元403，用于执行上述步骤205所示的方法。
发送单元404，用于根据该端口信息，将该串扰系数下发至该抵消模块中相应的抵消器。
该计算单元403，具体用于：根据该状态参数确定当前上线的端口总数K；
根据该状态参数和信道物理参数，计算K个端口的串扰系数。
该发送单元404，具体用于：根据该端口信息，将该K个端口的串扰系数分别下发至与该K个端口相连的抵消器。
可选的，该发送单元404，具体用于执行上述步骤2071至步骤2073所示的方法。
可选的，该发送单元404，具体用于：对该K个端口中每个端口的串扰系数进行报文封装；向与该K个端口相连的抵消器发送封装后的报文。
可选的，该第一接收单元401，具体用于：
通过第二网络接口接收基带芯片上报的状态参数；
向该基带芯片下发信道物理参数获取请求；
接收该基带芯片根据该信道物理参数获取请求上报的信道物理参数。
综上所述，本发明实施例提供了一种运算中心，该运算中心可以与部署于 不同物理位置的抵消模块和基带芯片进行信号交互，并能够根据基带芯片上报的信道物理参数计算串扰系数，以及将该串扰系数下发至抵消模块。当该局端设备的信号收发容量增加时，通过为该运算中心分配更多的计算资源，即可实现对该运算中心运算规模的扩容，该扩容方法无需再定制新的芯片，扩容较为简单，能够灵活对不同端口数量的局端设备进行串扰抵消处理。
图6是本发明实施例提供的一种抵消模块的结构示意图，参考图6，该抵消模块可以包括：
发送单元501，用于执行上述步骤201所示的方法。
接收单元502，用于通过J个抵消器接收该运算中心下发的K个端口的串扰系数，该J个抵消器为与该K个端口相连的抵消器，该J为小于或等于L的正整数。
处理单元503，用于驱动该J个抵消器中的每个抵消器，根据该串扰系数，对接收到的至少一路串扰信号进行预处理。
可选的，该处理单元503，具体用于执行上述步骤2091和步骤2092所示的方法。
可选的，该接收单元502，具体用于：
接收该运算中心下发的系数配置指令，该系数配置指令用于指示待发送的串扰系数的端口个数为K；向该运算中心发送响应指令；通过J个抵消器接收该运算中心循环下发的该K个端口中每个端口的串扰系数；当确定接收到所有K个端口的串扰系数时，向该运算中心发送停止指令。
可选的，接收单元502，具体用于：通过J个抵消器接收该运算中心发送的封装后的报文；对该报文进行解封装，得到该K个端口的串扰系数。
综上所述，本发明实施例提供了一种抵消模块，该抵消模块包括至少一个抵消器，且该抵消模块可以与部署于不同物理位置的运算中心进行信号交互，并能够根据该运算中心下发的串扰系数对接收到的串扰信号进预处理。当该局 端设备的信号收发容量增加时，通过增加该抵消模块中抵消器的数量，即可实现对该抵消模块抵消规模的扩容，该扩容方法无需再定制新的芯片，扩容较为简单，能够灵活对不同端口数量的局端设备进行串扰抵消处理。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上所述仅为本申请的可选实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (16)

  1. 一种串扰抵消装置，其特征在于，所述装置包括：
    部署于不同物理位置的运算中心和抵消模块，所述抵消模块包括：L个抵消器，所述L为正整数；
    所述运算中心通过第一网络接口与所述抵消模块连接，并通过第二网络接口与基带芯片连接；
    所述运算中心用于根据所述基带芯片上报的状态参数和信道物理参数，计算串扰系数，并通过所述第一网络接口向所述抵消模块中的抵消器下发所述串扰系数；
    所述抵消模块中的每个抵消器与至少一个端口相连，所述每个抵消器用于根据所述串扰系数，对通过所述至少一个端口接收到的串扰信号进行预处理。
  2. 根据权利要求1所述的串扰抵消装置，其特征在于，
    所述运算中心部署于云服务器或者局端服务器中，所述抵消模块部署于局端设备中。
  3. 根据权利要求1所述的串扰抵消装置，其特征在于，
    所述L为大于1的整数，所述L个抵消器中任意两个抵消器之间通过第三网络接口互相连接；
    所述L个抵消器中第i个抵消器与Ni个端口相连，所述i为小于等于L的正整数，所述Ni为正整数；
    所述第i个抵消器用于：通过所述Ni个端口接收Ni路串扰信号，将接收到的所述Ni路串扰信号通过所述第三网络接口分别发送至其他L-1个抵消器，以及根据所述串扰系数和其他L-1个抵消器发送的串扰信号，对所述Ni路串扰信号进行预处理。
  4. 根据权利要求1所述的串扰抵消装置，其特征在于，所述运算中心，包括：状态控制单元和至少一个系数运算单元；
    所述状态控制单元，用于接收所述基带芯片上报的状态参数和信道物理参数，并根据所述状态参数，确定串扰系数计算模型；
    每个所述系数运算单元，用于在所述状态控制单元的指示下，根据所述串扰系数计算模型，对所述信道物理参数进行计算，得到多个端口或者多个子载波的串扰系数。
  5. 根据权利要求1至4任一所述的串扰抵消装置，其特征在于，
    所述第一网络接口、所述第二网络接口和所述第三网络接口均为以太网接口。
  6. 一种串扰抵消系统，其特征在于，所述系统包括：
    M个级联的串扰抵消装置，每个所述串扰抵消装置为如权利要求1至5任一所述的串扰抵消装置，所述M为大于1的整数；
    其中，任意两个串扰抵消装置中的运算中心通过第四网络接口互相连接，每个所述串扰抵消装置中的运算中心，还用于将接收到的信道物理参数通过所述第四网络接口分别发送至其他M-1个串扰抵消装置中的运算中心；
    任意两个串扰抵消装置中的抵消模块通过第三网络接口互相连接，每个所述串扰抵消装置中的抵消模块，还用于将接收到的串扰信号通过所述第三网络接口分别发送至其他M-1个串扰抵消装置中的抵消模块。
  7. 一种串扰抵消方法，其特征在于，所述方法包括：
    运算中心通过第一网络接口接收抵消模块上报的端口信息，其中，所述抵消模块包括L个抵消器，所述端口信息中包括所述L个抵消器中每个抵消器所连接的端口的标识，所述L为正整数；
    所述运算中心通过第二网络接口接收基带芯片上报的状态参数和信道物理参数；
    所述运算中心根据所述状态参数和信道物理参数，计算串扰系数；
    所述运算中心根据所述端口信息，将所述串扰系数下发至所述抵消模块中相应的抵消器。
  8. 根据权利要求7所述的方法，其特征在于，所述运算中心根据所述状态参数和信道物理参数，计算串扰系数，包括：
    所述运算中心根据所述状态参数确定当前上线的端口总数K；
    所述运算中心根据所述状态参数和所述信道物理参数，计算K个端口的串扰系数；
    所述运算中心根据所述端口信息，将所述串扰系数下发至所述抵消模块中相应的抵消器，包括：
    所述运算中心根据所述端口信息，将所述K个端口的串扰系数分别下发至与所述K个端口相连的抵消器。
  9. 根据权利要求8所述的方法，其特征在于，所述运算中心根据所述端口信息，将所述K个端口的串扰系数分别下发至与所述K个端口相连的抵消器，包括：
    所述运算中心向所述抵消模块下发系数配置指令，所述系数配置指令用于指示待发送的串扰系数的端口个数为K；
    当所述运算中心接收到所述抵消模块发送的响应指令时，通过第一网络接口向与所述K个端口相连的抵消器循环下发所述K个端口中每个端口的串扰系数，直至接收到所述抵消模块发送的停止指令，所述停止指令是所述抵消模块在确定接收到所有K个端口的串扰系数后发送的。
  10. 根据权利要求8所述的方法，其特征在于，所述运算中心根据所述端 口信息，将所述K个端口的串扰系数分别下发至所述抵消模块，包括：
    所述运算中心对所述K个端口中每个端口的串扰系数进行报文封装；
    所述运算中心向与所述K个端口相连的抵消器发送封装后的报文。
  11. 根据权利要求7至10任一所述的方法，其特征在于，所述运算中心通过第二网络接口接收基带芯片上报的状态参数和信道物理参数，包括：
    所述运算中心通过第二网络接口接收基带芯片上报的状态参数；
    所述运算中心向所述基带芯片下发信道物理参数获取请求；
    所述运算中心接收所述基带芯片根据所述信道物理参数获取请求上报的信道物理参数。
  12. 一种串扰抵消方法，其特征在于，所述方法包括：
    抵消模块通过第一网络接口向运算中心上报端口信息，所述抵消模块包括L个抵消器，所述端口信息中包括所述L个抵消器中每个抵消器所连接的端口的标识，所述L为正整数；
    所述抵消模块通过J个抵消器接收所述运算中心下发的K个端口的串扰系数，所述J个抵消器为与所述K个端口相连的抵消器，所述J为小于或等于L的正整数；
    所述抵消模块驱动所述J个抵消器中的每个抵消器，根据所述串扰系数，对接收到的至少一路串扰信号进行预处理。
  13. 根据权利要求12所述的方法，其特征在于，所述抵消模块驱动所述J个抵消器中的每个抵消器，根据所述串扰系数，对接收到的至少一路串扰信号进行预处理，包括：
    当所述J大于1时，所述抵消模块驱动所述J个抵消器中的每个抵消器将接收到的至少一路串扰信号分别发送至其他J-1个抵消器；
    所述抵消模块驱动所述每个抵消器根据所述串扰系数以及所述其他J-1个 抵消器发送的串扰信号，对所述至少一路串扰信号进行预处理。
  14. 根据权利要求12所述的方法，其特征在于，所述抵消模块通过J个抵消器接收运算中心下发的K个端口的串扰系数，包括：
    所述抵消模块接收所述运算中心下发的系数配置指令，所述系数配置指令用于指示待发送的串扰系数的端口个数为K；
    所述抵消模块向所述运算中心发送响应指令；
    所述抵消模块通过J个抵消器接收所述运算中心循环下发的所述K个端口中每个端口的串扰系数；
    当所述抵消模块确定接收到所有K个端口的串扰系数时，向所述运算中心发送停止指令。
  15. 根据权利要求12至14任一所述的方法，其特征在于，所述抵消模块通过J个抵消器接收运算中心下发的K个端口的串扰系数，包括：
    所述抵消模块通过J个抵消器接收所述运算中心发送的封装后的报文；
    所述抵消模块对所述报文进行解封装，得到所述K个端口的串扰系数。
  16. 一种串扰抵消方法，其特征在于，应用于如权利要求6所述的串扰抵消系统，所述M个级联的串扰抵消装置中包括一个主控串扰抵消装置，以及M-1个从控串扰抵消装置，其特征在于，所述方法包括：
    每个所述串扰抵消装置接收基带芯片上报的状态参数和信道物理参数；
    所述主控串扰抵消装置中的运算中心向其他M-1个从控串扰抵消装置中的运算中心分别发送交互指令；
    每个所述串扰抵消装置中的运算中心根据所述交互指令，向其他M-1个串扰抵消装置的运算中心分别发送信道物理参数；
    每个所述串扰抵消装置中的运算中心根据接收到的信道物理参数计算串扰系数，并将所述串扰系数下发至对应的抵消模块；
    每个所述串扰抵消装置中的抵消模块将接收到的串扰信号发分别发送至其他M-1个串扰抵消装置中的抵消模块；
    每个所述串扰抵消装置中的抵消模块根据所述串扰系数以及其他M-1个串扰抵消装置发送的串扰信号，对本模块接收到的串扰信号进行预处理。
PCT/CN2016/111372 2016-12-21 2016-12-21 串扰抵消方法、装置及系统 WO2018112807A1 (zh)

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