WO2020199040A1 - 通信方法、装置、系统及存储介质 - Google Patents

通信方法、装置、系统及存储介质 Download PDF

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Publication number
WO2020199040A1
WO2020199040A1 PCT/CN2019/080670 CN2019080670W WO2020199040A1 WO 2020199040 A1 WO2020199040 A1 WO 2020199040A1 CN 2019080670 W CN2019080670 W CN 2019080670W WO 2020199040 A1 WO2020199040 A1 WO 2020199040A1
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Prior art keywords
plc
node
dsl
transceiver
signal
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PCT/CN2019/080670
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English (en)
French (fr)
Inventor
李莹
马格赛棋托马斯
陈仕才
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华为技术有限公司
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Priority to PCT/CN2019/080670 priority Critical patent/WO2020199040A1/zh
Publication of WO2020199040A1 publication Critical patent/WO2020199040A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/02Details
    • H04B3/32Reducing cross-talk, e.g. by compensating
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/54Systems for transmission via power distribution lines

Definitions

  • This application relates to communication technology, and in particular to a communication method, device, system and storage medium.
  • Power Line Communication (PLC) technology can use power lines to transmit data and voice signals. It can include high-voltage power line communications, medium-voltage power line communications, and indoor power line communications.
  • the embodiments of the present application provide a communication method, device, system, and storage medium to reduce the interference of PLC nodes to DSL nodes and ensure network transmission quality.
  • the embodiments of the present application provide a communication method, which is applied to a system including a power line communication PLC transceiver and a digital subscriber line DSL transceiver, wherein the PLC transceiver is connected to the DSL transceiver, and the The PLC transceiver is connected to the network equipment in the upstream, the PLC transceiver is connected to one or more PLC nodes in the downstream, the DSL transceiver is connected to the network equipment in the upstream, and the DSL transceiver is connected to the DSL node in the downstream.
  • the communication method may include:
  • the PLC transceiver sends first scheduling information to the DSL transceiver, where the first scheduling information includes information about a scheduling time period of a first PLC node among the one or more PLC nodes;
  • the DSL transceiver obtains the cancellation coefficient corresponding to the first PLC node, and cancels the first noise signal on the DSL signal according to the cancellation coefficient corresponding to the first PLC node
  • the DSL signal is a transmission signal between the DSL transceiver and a DSL node
  • the first noise signal is a noise signal generated by the PLC transceiver and the first PLC node in communication.
  • the first PLC node is a node that accesses the PLC transceiver for the first time.
  • the DSL transceiver shown above obtains the cancellation coefficient corresponding to the first PLC node, which may include:
  • the DSL transceiver determines the cancellation coefficient corresponding to the first PLC node according to the differential mode signal of the DSL in the DSL transceiver and the common mode signal extracted from the DSL.
  • the DSL transceiver when the first PLC node is the node that accesses the PLC transceiver for the first time, the DSL transceiver can use the differential mode signal of the DSL in the DSL transceiver and the common mode signal extracted from the DSL, Determining the cancellation coefficient corresponding to the first PLC node can make the cancellation coefficient more accurate, thereby effectively reducing the interference of the PLC node to the DSL node and improving the communication quality. Moreover, this method can also enable a newly accessed PLC node to quickly join the network to realize network services, and can also quickly reduce the interference of the PLC node to the DSL node.
  • the communication method may further include:
  • the DSL transceiver stores the cancellation coefficient corresponding to the first PLC node into a preset cancellation list.
  • the cancellation coefficient corresponding to the first PLC node can be stored, so that when the first PLC node connects to the PLC transceiver for communication, the cancellation coefficient can be directly obtained without passing through the cancellation coefficient.
  • the training is determined, so as to quickly reduce the interference of PLC nodes to DSL nodes.
  • the first PLC node is a node that is not connected to the PLC transceiver for the first time
  • the DSL transceiver acquiring the cancellation coefficient corresponding to the first PLC node includes:
  • the DSL transceiver obtains the cancellation coefficient corresponding to the first PLC node from a preset cancellation list, and the cancellation list stores the cancellation coefficient corresponding to at least one PLC node.
  • the DSL transceiver can obtain the cancellation coefficient corresponding to the first PLC node from the preset cancellation list, so as to interfere with the first noise signal on the DSL signal without training the cancellation coefficient. Make sure to quickly reduce the interference from PLC nodes to DSL nodes.
  • the first PLC node as described above may include: multiple nodes connected to the PLC transceiver.
  • the DSL transceiver obtains the cancellation coefficient corresponding to the first PLC node, and performs a calculation on the DSL signal according to the cancellation coefficient corresponding to the first PLC node.
  • the first noise signal to be cancelled including:
  • the DSL transceiver obtains the cancellation coefficient corresponding to each node, and according to the cancellation coefficient corresponding to each node, determines the second noise signal on the DSL signal For cancellation, the second noise signal is a noise signal generated by the PLC transceiver communicating with each node.
  • the method may further include:
  • the DSL transceiver determines whether the noise parameter of the DSL signal is equal to or exceeds a preset noise threshold during the communication process of the first PLC node;
  • the DSL transceiver obtains the cancellation coefficient corresponding to the first PLC node.
  • the communication method may further include:
  • the DSL transceiver also sends the information of the first PLC node to the PLC transceiver.
  • the communication method may further include:
  • the PLC transceiver sends scheduling information of at least one group to the DSL transceiver, and the scheduling information of each group includes: information about the scheduling time period of at least one PLC node in each group; at least one PLC node in each group , There is only one second PLC node, and the second PLC node is a PLC node whose noise parameter of the DSL signal is equal to or exceeds the noise threshold during the communication process;
  • the DSL transceiver obtains the cancellation coefficient corresponding to the second PLC node in the scheduling time period of the second PLC node in each group;
  • the DSL transceiver cancels the third noise signal of the DSL signal according to the cancellation coefficient corresponding to the second PLC node within the scheduling time period of at least one PLC node in each group; the third noise signal is the The noise signal generated by the PLC transceiver communicating with the at least one PLC node.
  • each group has only one second PLC node, and in the scheduling period of each group, the cancellation coefficient corresponding to the second PLC node is used for interference cancellation, that is, there is no need to perform the cancellation coefficient in each group.
  • the switching of the offset coefficient is required, which avoids frequent switching of the offset coefficient, effectively reduces or reduces the interference of the PLC node to the DSL node, and improves the communication quality.
  • the communication method may further include:
  • the DSL transceiver starts the online reconfiguration OLR and increases the signal-to-noise ratio margin.
  • the communication method can enable the DSL transceiver to obtain the cancellation coefficient corresponding to each node in the scheduling time period of each node among the multiple nodes, and transmit the cancellation coefficient to the DSL signal according to the cancellation coefficient corresponding to each node.
  • the second noise signal is cancelled, effectively reducing the interference of each of the multiple nodes to the DSL node, and improving the communication quality.
  • the scheduling time period shown above is a time slot CBTS based on competition, or a time slot CFTS with free competition.
  • the embodiments of the present application may also provide a communication device, which is applicable to a system including a power line communication PLC transceiver and a digital subscriber line DSL transceiver, the PLC transceiver is connected to the DSL transceiver, and the The PLC transceiver is connected to the network equipment upstream, the PLC transceiver is connected to one or more PLC nodes downstream, the DSL transceiver is connected to the network equipment upstream, and the DSL transceiver is connected downstream to the DSL node;
  • the communication device may include: The first module for the PLC transceiver, and the second module for the DSL transceiver;
  • the first module is configured to control the PLC transceiver to send first scheduling information to the DSL transceiver, where the first scheduling information includes information about the scheduling time period of the first PLC node among the one or more PLC nodes;
  • the second module is used to control the DSL transceiver to obtain the offset coefficient corresponding to the first PLC node during the scheduling time period of the first PLC node, and to determine the offset coefficient on the DSL signal according to the offset coefficient corresponding to the first PLC node
  • the first noise signal is cancelled, the DSL signal is a transmission signal between the DSL transceiver and the DSL node, and the first noise signal is a noise signal generated by the communication between the PLC transceiver and the first PLC node.
  • the first PLC node is: a node that accesses the PLC transceiver for the first time;
  • the second module shown above is specifically used to control the DSL transceiver to determine the cancellation coefficient corresponding to the first PLC node according to the differential mode signal of the DSL in the DSL transceiver and the common mode signal extracted from the DSL.
  • the second module as described above is also used to control the DSL transceiver to store the offset coefficient corresponding to the first PLC node into a preset offset list.
  • the second module shown above is specifically configured to control the DSL transceiver to obtain the offset coefficient corresponding to the first PLC node from a preset offset list, and the offset list stores at least one PLC The offset coefficient corresponding to the node.
  • the first PLC node includes: multiple nodes connected to the PLC transceiver;
  • the second module is specifically configured to control the DSL transceiver to obtain the offset coefficient corresponding to each node during the scheduling time period of each node in the multiple nodes, and to determine the corresponding offset coefficient according to the offset coefficient corresponding to each node.
  • the second noise signal on the DSL signal is cancelled, and the second noise signal is a noise signal generated by the PLC transceiver communicating with each node.
  • the second module is also used to control the DSL transceiver to determine whether the noise parameter of the DSL signal is equal to the noise parameter of the DSL signal during the communication process of the first PLC node before obtaining the cancellation coefficient corresponding to the first PLC node Or exceed the preset noise threshold; if so, obtain the cancellation coefficient corresponding to the first PLC node.
  • the second module is also used to control the DSL transceiver to send the information of the first PLC node to the PLC transceiver.
  • the first module is also used to control the PLC transceiver to send at least one group of scheduling information to the DSL transceiver, and the scheduling information of each group includes: scheduling of at least one PLC node in each group Time period information; among the at least one PLC node in each group, there is only one second PLC node, and the second PLC node is a PLC node whose noise parameter of the DSL signal is equal to or exceeds the noise threshold during the communication process;
  • the second module is also used to control the DSL transceiver to obtain the offset coefficient corresponding to the second PLC node during the scheduling time period of the second PLC node in each group; at least one PLC node in each group During the scheduling time period of the second PLC node, the third noise signal of the DSL signal is cancelled according to the cancellation coefficient corresponding to the second PLC node; the third noise signal is the noise generated by the communication between the PLC transceiver and the at least one PLC node signal.
  • the second module is also used to control the DSL transceiver to start the online reconfiguration OLR at the beginning of the scheduling time period and increase the signal-to-noise ratio margin.
  • the embodiments of the present application may also provide a communication system including: a power line communication PLC transceiver and a digital subscriber line DSL transceiver system, where the PLC transceiver includes: a first network interface, a PLC interface, and a second network interface.
  • a processor and a first transmission interface, the first network interface, the PLC interface, and the first transmission interface are respectively connected to the first processor, the first network interface is connected to an uplink network device, the PLC interface Connected to one or more PLC nodes for downlink access;
  • the DSL transceiver includes: a second network interface, a DSL interface, a second processor, and a second transmission interface, the second network interface, the DSL interface, and the second The transmission interface is respectively connected with the second processor; the first transmission interface is also connected with the second transmission interface;
  • the first transmission interface is configured to send first scheduling information to the second transmission interface, where the first scheduling information includes information about a scheduling time period of a first PLC node among the one or more PLC nodes;
  • the second transmission interface is used to receive the first scheduling information
  • the second processor is configured to obtain the cancellation coefficient corresponding to the first PLC node within the scheduling time period of the first PLC node, and to determine the first PLC node on the DSL signal according to the cancellation coefficient corresponding to the first PLC node.
  • the noise signal is cancelled, the DSL signal is a transmission signal between the DSL transceiver and the DSL node, and the first noise signal is a noise signal generated by the communication between the PLC transceiver and the first PLC node.
  • the first PLC node is the node that accesses the PLC transceiver for the first time.
  • the second processor is specifically configured to determine the cancellation coefficient corresponding to the first PLC node according to the differential mode signal of the DSL in the DSL transceiver and the common mode signal extracted from the DSL.
  • the second processor is further configured to store the offset coefficient corresponding to the first PLC node into a preset offset list.
  • the first PLC node is a node that is not connected to the PLC transceiver for the first time
  • the second processor is specifically configured to obtain the cancellation coefficient corresponding to the first PLC node from a preset cancellation list, and the cancellation list stores the cancellation coefficient corresponding to at least one PLC node.
  • the second processor is specifically used for scheduling time of each node in the multiple nodes In the segment, the cancellation coefficient corresponding to each node is obtained, and the second noise signal on the DSL signal is canceled according to the cancellation coefficient corresponding to each node.
  • the second noise signal is the PLC transceiver and the each node. The noise signal generated by the communication between two nodes.
  • the second processor is further configured to determine whether the noise parameter of the DSL signal is equal to or exceeds the preset value during the communication process of the first PLC node before obtaining the cancellation coefficient corresponding to the first PLC node. Set the noise threshold; if so, obtain the cancellation coefficient corresponding to the first PLC node.
  • the second transmission interface shown above is further used to send information of the first PLC node to the first transmission interface
  • the first transmission interface is also used to receive information of the first PLC node.
  • the first transmission interface is also used to send scheduling information of at least one group to the second transmission interface, and the scheduling information of each group includes: the scheduling time of at least one PLC node in each group Segment information; at least one PLC node in each group has only one second PLC node, and the second PLC node is the PLC node whose noise parameter of the DSL signal during the communication process is equal to or exceeds the noise threshold;
  • the second processor is further configured to obtain the offset coefficient corresponding to the second PLC node in the scheduling time period of the second PLC node in each group; the scheduling time period of at least one PLC node in each group Inside, the third noise signal of the DSL signal is cancelled according to the cancellation coefficient corresponding to the second PLC node; the third noise signal is the noise signal generated by the communication between the PLC transceiver and the at least one PLC node.
  • the second processor is further configured to start the online reconfiguration OLR at the beginning of the scheduling period before obtaining the offset coefficient corresponding to the first PLC node, and increase the signal-to-noise ratio Margin.
  • the communication system shown above is a communication device, such as a gateway device.
  • an embodiment of the present application further provides a computer storage system, including: a first storage medium and a second storage medium, wherein the first storage medium stores a first computer program, and the second storage medium stores a second computer program. program;
  • the first computer program is used to implement the communication method executed by the PLC transceiver in the above first aspect when being executed by the processor of the PLC transceiver for power line communication;
  • the second computer program is used to implement the communication method executed by the DSL transceiver in the first aspect when executed by the processor of the digital subscriber line DSL transceiver.
  • an embodiment of the present application also provides a computer storage medium on which a computer program is stored, and the computer program is used to implement the communication method in the first aspect when executed by a processor.
  • an embodiment of the present application also provides a computer program for executing the communication method of the first aspect when called by a processor.
  • an embodiment of the present application further provides a chip system, including: a first chip and a second chip, the first chip includes a first processing module and a first communication interface, and the second chip includes a second processing module and a second chip.
  • the communication module, the first processing module is used to execute the communication method executed by the PLC transceiver in the above first aspect
  • the second processing module is used to execute the communication method executed by the DSL transceiver in the above second aspect.
  • the first chip further includes a first storage module (for example, a memory), the storage module is used to store instructions, the first processing module is used to execute instructions stored in the first storage module, and store information in the first storage module
  • the execution of the instructions in the first aspect causes the first processing module to execute the communication method performed by the PLC transceiver described in the first aspect
  • the second chip also includes a second storage module (eg, a memory), and the second storage module is used to store Instructions, the second processing module is used to execute the instructions stored in the second storage module, and the execution of the instructions stored in the second storage module causes the second processing module to execute the communication performed by the DSL transceiver described in any one of the first aspect method.
  • an embodiment of the present application provides a chip including: a processing module and a communication interface, and the processing module can execute any of the communication methods described in the first aspect.
  • the chip further includes a storage module (such as a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module causes the processing module to execute the first The communication method of any one of the aspects.
  • a storage module such as a memory
  • the storage module is used to store instructions
  • the processing module is used to execute the instructions stored in the storage module
  • the execution of the instructions stored in the storage module causes the processing module to execute the first The communication method of any one of the aspects.
  • the communication method, device, system, and storage medium provided in the embodiments of the application can send the scheduling information of the first PLC node to the DSL transceiver in the gateway device through the PLC transceiver in the gateway device, and the scheduling information of the first PLC node
  • the information includes information about the scheduling time period of the first PLC node.
  • the DSL transceiver obtains the offset coefficient corresponding to the first PLC node, and according to the first PLC node correspondence
  • the cancellation coefficient is to cancel the first noise signal on the DSL signal
  • the DSL signal is the transmission signal between the DSL transceiver and the DSL node
  • the first noise signal is the communication between the PLC transceiver and the first PLC node
  • the DSL transceiver can obtain the cancellation coefficient corresponding to the first PLC node within the scheduling time period of the first PLC node, and according to the cancellation coefficient corresponding to the first PLC node, determine the first PLC node on the DSL signal.
  • the cancellation of the first noise signal generated by the PLC node can effectively reduce the interference of the PLC node to the DSL node and improve the communication quality.
  • FIG. 1 is a schematic diagram of a PLC application network scenario provided by an embodiment of the application
  • FIG. 2 is a schematic structural diagram of a gateway device provided by an embodiment of the application.
  • FIG. 3 is a flowchart of a communication method provided by an embodiment of this application.
  • FIG. 4 is a flowchart of a method for obtaining a cancellation coefficient corresponding to a first PLC node in a communication method according to an embodiment of the application;
  • FIG. 5 is a schematic structural diagram of another gateway device provided by an embodiment of this application.
  • FIG. 6 is a flowchart of a method for identifying harmful PLC nodes in a communication method provided by an embodiment of the application
  • FIG. 7 is a flowchart of another communication method provided by an embodiment of the application.
  • FIG. 8 is a flowchart of yet another communication method provided by an embodiment of this application.
  • FIG. 9 is a flowchart of yet another communication method provided by an embodiment of this application.
  • FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 11 is a schematic structural diagram of a communication system provided by an embodiment of this application.
  • FIG. 1 is a schematic diagram of a scenario of a PLC application network provided by an embodiment of the application.
  • the PLC application network includes: at least one network interface and at least one power line interface.
  • the network interface may be a telephone jack that conforms to the TAE standard in FIG. 1, which is used to receive network signals and realize access to an external network.
  • the power line interface can be a power line socket, such as the power line sockets at positions A, B, C, D, E, and F shown in Figure 1, which can be used to connect PLC nodes, also known as PLC devices or PLC terminals, to enable PLCs located in different locations in the room
  • PLC nodes also known as PLC devices or PLC terminals, to enable PLCs located in different locations in the room
  • the node realizes the Internet access function.
  • the gateway device or the DSL transceiver in the communication system can be connected to the network interface shown in Figure 1 to receive network signals such as DSL signals, and the gateway device or the PLC transceiver in the communication system After connecting to a power line socket and modulating the DSL signal into a PLC signal, it is transmitted to the power line socket or other PLC nodes connected to the power line socket, or after receiving the PLC signal transmitted by the PLC node and modulating the PLC signal into a DSL signal, It is transmitted to the external network to realize the network function of the PLC node.
  • network signals such as DSL signals
  • PLC transceiver in the communication system After connecting to a power line socket and modulating the DSL signal into a PLC signal, it is transmitted to the power line socket or other PLC nodes connected to the power line socket, or after receiving the PLC signal transmitted by the PLC node and modulating the PLC signal into a DSL signal, It is transmitted to the external network to realize the network function of the PLC node.
  • the gateway device or the DSL transceiver in the communication system can receive the DSL signal
  • the gateway device or the DSL transceiver in the communication system can also transmit the DSL signal to the DSL node to realize the network function of the DSL node.
  • the PLC node mentioned above can also be referred to as a PLC device, which can be a terminal device that supports PLC technology, such as an indoor AC power device that supports PLC technology.
  • the indoor AC power equipment that supports PLC technology includes, for example, any equipment such as televisions, washing machines, refrigerators, set-top boxes, projectors, and speakers.
  • the DSL node mentioned above may be, for example, a terminal device supporting DSL technology, such as a device having a DSL interface.
  • the device with a DSL interface may be any device such as a desktop computer, a notebook computer, a server, and a switch.
  • DSL signals are usually transmitted in a frequency division duplex (Frequency Division Duplexing, FDD) manner to avoid mutual interference between uplink and downlink signals.
  • FDD Frequency Division Duplexing
  • G.Fast ultra-high-speed DSL
  • Time Division Duplexing (TDD) duplex mode is used to transmit DSL signals.
  • the traditional DSL technology can be, for example, Asymmetric Digital Subscriber Line (ADSL), Very-high-bit-rate Digital Subscriber Line (VDSL), and Very-high-bit-rate Digital Subscriber Line (VDSL). Very-high-bit-rate Digital Subscriber Line 2, VDSL2) etc.
  • the PLC node can load the high-frequency signal carrying information with the current, and transmit the current loaded with the high-frequency signal as a PLC signal with a wire.
  • the device that receives the PLC signal then separates the high-frequency signal from the current to achieve Information transfer.
  • the DSL signals involved in the following embodiments of this application may be DSL signals based on any of the above technologies, such as DSL signals of traditional DSL technology or DSL signals of ultra-high-speed DSL technology, etc.; PLC signals involved in this application may be PLC signal based on indoor power line communication.
  • PLC signals no matter what kind of DSL technology, there is spectrum overlap, which makes PLC nodes have strong interference to DSL nodes. This spectrum overlap may be referred to as the spectrum overlap between the DSL node and the PLC node, that is, the spectrum overlap between the DSL signal transmitted by the DSL node and the PLC signal transmitted by the PLC node.
  • the communication methods provided in the following embodiments of the present application aim to reduce the interference of PLC nodes to DSL nodes and improve communication quality.
  • inventions of the present application provide a communication system, and a communication method, device, storage medium, etc. applied to the communication system.
  • the product form of the communication system may be a gateway device including a digital subscriber line transceiver and a power line communication transceiver, or a device system including a digital subscriber line transceiver and a power line communication transceiver.
  • the embodiment of the present application will be described by taking a gateway device including a digital subscriber line transceiver and a power line communication transceiver as an example.
  • Fig. 2 is a schematic structural diagram of a gateway device provided by an embodiment of the application. The gateway device 20 shown in FIG.
  • the digital subscriber line transceiver 21 may be a DSL transceiver based on any of the above DSL technologies, such as a DSL transceiver of traditional DSL technology or a DSL transceiver of ultra-high-speed DSL technology.
  • the digital subscriber line transceiver 21 may also be called a DSL transceiver.
  • the power line communication transceiver 22 may also be called a PLC transceiver or a PLC module, and the digital subscriber line transceiver 21 and the power line communication transceiver 22 may be two independent modules inside the gateway device 20, respectively.
  • the digital subscriber line transceiver 21 is connected to the power line communication transceiver 22 to realize information transmission between the digital subscriber line transceiver 21 and the power line communication transceiver 22.
  • the gateway device 20 also has a wired interface (wireline interface) 23, which can be connected with a network device such as a central office device to implement network signal transmission between the gateway device 20 and the network device.
  • the central office equipment may be, for example, a distribution point (DP) or a digital subscriber line access multiplexer (DSL Access Multiplexer, DSLAM).
  • DP distribution point
  • DSLAM digital subscriber line access multiplexer
  • the digital subscriber line transceiver 21 and the power line communication transceiver 22 can be respectively connected to network equipment, that is, the digital subscriber line transceiver 21 is connected to the network equipment to realize the uplink access of the digital subscriber line transceiver 21, and the power line communication transceiver
  • the device 22 is also connected to network equipment to realize the uplink access of the power line communication transceiver 22.
  • the digital subscriber line transceiver 21 can be connected to the network device to realize the uplink access of the digital subscriber line transceiver 21, and use this as the uplink access of the network device. 21 is indirectly connected to the power line communication transceiver 22, so that the power line communication transceiver 22 is connected to the uplink, that is, the power line communication transceiver 22 is connected to the network device in the uplink.
  • the gateway device 20 also has an Ethernet router 24, which can be connected to the digital subscriber line transceiver 21 and the power line communication transceiver 22 respectively, that is, the digital subscriber line transceiver 21 can be connected to the digital subscriber line transceiver 21 through the Ethernet router.
  • the power line communication transceiver 22 is connected.
  • the digital subscriber line transceiver 21 is connected to a DSL node in the downlink, and the power line communication transceiver 22 is connected to one or more PLC nodes in the downlink.
  • the gateway device 20 also has a network cable interface 25.
  • the network cable interface 25 can be a Category 5 (CAT5) interface.
  • the network cable interface 25 can also be called a home or indoor gateway interface.
  • the network cable interface 25 can be used to communicate with DSL.
  • the node connection is used to realize the downlink access of the digital subscriber line transceiver 21, thereby realizing the network service of the DSL node.
  • the gateway device 20 also has a powerline interface 26, which can be used to connect to a PLC node, so that the powerline transceiver 22 can access one or more PCL nodes downstream, and then realize the network service of the PLC node.
  • the Ethernet router 24 can be used to route the DSL signal received by the digital subscriber line transceiver 21 through the wired interface 23 to the power line communication transceiver 22, so that the power line communication transceiver 22 converts the received DSL signal into PLC
  • the PLC signal is transmitted to the PLC node connected to the power line interface 26 through the power line interface 26; the Ethernet router 24 can also be used to convert the PLC signal received through the power line interface 26 into a DSL signal, and pass the Ethernet router 24
  • the DSL signal is transmitted to the digital subscriber line transceiver 21, so that the digital subscriber line transceiver 21 transmits the DSL signal to the network device through the wired interface 23, thereby realizing the network service of the PLC node.
  • the Ethernet router 24 can also be used to route the DSL signal received by the digital subscriber line transceiver 21 through the cable interface 23 to the DSL node connected to the network cable interface 25; it can also route the DSL signal sent by the DSL node received through the network cable interface 25 The signal is transmitted to the digital subscriber line transceiver 21, so that the digital subscriber line transceiver 21 transmits the DSL signal to the network device through the wired interface 23, thereby realizing the network service of the DSL node.
  • the gateway device 20 also includes a power supply device 27, which is connected to the power line interface 26, and can also be connected to various electrical devices inside the gateway device 20.
  • the power supply device 27 can receive a current signal through the power line interface 26 to provide electrical energy to the electrical devices in the gateway device 20.
  • the electrical devices in the gateway device 20 may include, for example, a digital subscriber line transceiver 21, a power line communication transceiver 22, and an Ethernet router 24. That is to say, the power supply device 27 can also communicate with digital subscribers respectively.
  • the line transceiver 21, the power line communication transceiver 22, and the Ethernet router 24 are connected. It should be pointed out that in FIG. 2, the electrical connections between the power supply device 27 and the electrical devices inside the gateway device 20 are not shown temporarily.
  • FIG. 3 is a flowchart of a communication method provided by an embodiment of this application.
  • the communication method may be implemented by a communication system including the digital subscriber line transceiver 21 and the power line communication transceiver 22.
  • the communication system may be, for example, a product form similar to or the same as the gateway device 20 shown in FIG. 2 above, or other products. Product form.
  • the communication method may include:
  • the PLC transceiver sends first scheduling information (Scheduling information) to the DSL transceiver, where the first scheduling information includes information about the scheduling time period of the first PLC node among the one or more PLC nodes.
  • first scheduling information includes information about the scheduling time period of the first PLC node among the one or more PLC nodes.
  • the PLC transceiver may be the power line communication transceiver 22 shown in FIG. 2 described above.
  • the DSL transceiver may be the digital subscriber line transceiver shown in FIG. 2 above.
  • the one or more PLC nodes may be PLC nodes connected to the power line communication transceiver 22, and the network formed by the PLC nodes connected to the power line communication transceiver 22 may be called a PLC network, and the one or more PLC nodes may also It is called PLC node in PLC network.
  • the power line communication transceiver 22 can be connected to the power line communication transceiver 22 through the power line interface 26.
  • the first PLC node may be a part or all of the one or more PLC nodes, and may be one or multiple.
  • the PLC transceiver can obtain the scheduling information of the first PLC node and send the first scheduling information to the DSL transceiver; the PLC transceiver can also obtain the scheduling information of all PLC nodes among the multiple PLC nodes connected to the PLC transceiver , Select the scheduling information of the first PLC node, and send the first scheduling information to the DSL transceiver.
  • the PLC node may send an access request to the power line communication transceiver 22 through the power line interface 26, and the power line communication transceiver 22 determines the PLC node to be accessed according to the received access request, and schedules the accessed PLC node.
  • the power line communication transceiver 22 can allocate scheduling resources for the connected PLC nodes to realize the scheduling of the PLC nodes.
  • the scheduling resources may include resources such as scheduling time period and/or scheduling frequency.
  • the scheduling information of the first PLC node sent by the PLC transceiver to the DSL transceiver may at least include information about the scheduling time period of the first PLC node.
  • the scheduling time period may be a contention-based time slot (CBTS) or a contention-free time slot (CFTS).
  • CBTS contention-based time slot
  • CFTS contention-free time slot
  • the PLC transceiver can send the scheduling information of the first PLC node to the DSL transceiver through the connection path with the DSL transceiver.
  • the DSL transceiver obtains the cancellation coefficient corresponding to the first PLC node, and calculates the first noise signal on the DSL signal according to the cancellation coefficient corresponding to the first PLC node Offset.
  • the DSL signal is a transmission signal between the DSL transceiver and a DSL node
  • the first noise signal is a noise signal generated by communication between the PLC transceiver and the first PLC node.
  • the PLC transceiver may schedule the first PLC node within the scheduling time period of the first PLC node, so as to implement communication between the PLC transceiver and the first PLC node.
  • the PLC transceiver communicates with the first PLC node, it will interfere with the communication between the DSL transceiver and the DSL node, that is, the first noise signal is generated on the DSL signal.
  • the first noise signal is actually generated during the scheduling time period of the first PLC. Therefore, the DSL transceiver can obtain the offset corresponding to the first PLC node during the scheduling time period of the first PLC node. Coefficient, and in the scheduling time period of the first PLC node, the first noise signal on the DSL signal is cancelled according to the cancellation coefficient corresponding to the first PLC node.
  • the cancellation coefficient corresponding to the first PLC node may be a filter coefficient corresponding to the first PLC node, and the DSL transceiver may process, such as filter, the DSL signal according to the filter coefficient corresponding to the first PLC node to filter out or The first noise signal on the DSL signal is reduced, so as to realize the cancellation of the first noise signal on the DSL signal.
  • the communication method provided by the embodiment of the present application can send first scheduling information to the DSL transceiver in the gateway device through the PLC transceiver, and the first scheduling information includes one or more PLC nodes connected to the PLC transceiver.
  • Information about the scheduling time period of the first PLC node Within the scheduling time period of the first PLC node, the DSL transceiver obtains the offset coefficient corresponding to the first PLC node, and according to the offset coefficient corresponding to the first PLC node Coefficient, to cancel the first noise signal on the DSL signal, the DSL signal is the transmission signal between the DSL transceiver and the DSL node, and the first noise signal is generated by the communication between the PLC transceiver and the first PLC node Noise signal.
  • the DSL transceiver can obtain the cancellation coefficient corresponding to the first PLC node within the scheduling time period of the first PLC node, and according to the cancellation coefficient corresponding to the first PLC node, determine the first PLC node on the DSL signal.
  • the cancellation of the first noise signal generated by the PLC node can effectively reduce the interference of the PLC node to the DSL node and improve the communication quality.
  • the first PLC node shown above may be a node that accesses the PLC transceiver for the first time, or may be a node that accesses the PLC transceiver for the first time.
  • the embodiment of the present application may also provide an example of a method for obtaining the offset coefficient corresponding to the node that accesses the PLC transceiver for the first time.
  • FIG. 4 is a flowchart of a method for obtaining a cancellation coefficient corresponding to a first PLC node in a communication method according to an embodiment of the application.
  • the DSL transceiver obtaining the cancellation coefficient corresponding to the first PLC node in S302 shown above may include:
  • the DSL transceiver determines the cancellation coefficient corresponding to the first PLC node according to the differential mode signal of the DSL in the DSL transceiver and the common mode signal extracted from the DSL.
  • the differential mode signal of the DSL may be a DSL signal received by the DSL transceiver from a cable interface or an Ethernet router, which is a DSL signal interfered by the first noise signal.
  • the DSL transceiver can extract a common mode signal from the differential mode signal according to a preset common mode extraction algorithm, and determine the corresponding signal of the first PLC node based on the differential mode signal and the common mode signal
  • the cancellation coefficient realizes the training of the cancellation coefficient.
  • FIG. 5 is a schematic structural diagram of another gateway device provided by an embodiment of this application.
  • the DSL transceiver 21 in the above-mentioned gateway device 20 may include: a common mode extraction module 211, a cancellation module 212, and a wired transceiver module 213.
  • the common mode extraction module 211 may be connected to the central office equipment through the wired interface 23, and may also be connected to the Ethernet router 24 through the wired transceiver module 213.
  • the common mode extraction module 211 is also connected to the wired transceiver module 213 through the cancellation module 212.
  • the cancellation module 212 is also connected to the PLC transceiver 22.
  • the common mode extraction module 211 can also be called a hybrid or RX/TX switch, which can extract the common mode signal from the DSL signal received by the central office equipment or the Ethernet router 24.
  • the common mode extraction module 211 can send the differential mode signal and the common mode signal to the cancellation module when it is determined that the DSL signal is received, that is, the differential mode signal, and the common mode signal is extracted therefrom, and the cancellation
  • the module 212 performs training of the cancellation coefficient according to the differential mode signal and the common mode signal to determine the cancellation coefficient corresponding to the first PLC node.
  • the cancellation module 212 determines the cancellation coefficient corresponding to the first PLC
  • the cancellation coefficient corresponding to the first PLC node can be sent to the wired transceiver module 213, and the wired transceiver module 213 can send the cancellation coefficient corresponding to the first PLC node according to the The cancellation coefficient cancels the first noise signal on the DSL signal.
  • the method may also include:
  • the DSL transceiver stores the cancellation coefficient corresponding to the first PLC node into a preset cancellation list.
  • the DSL transceiver may store the offset coefficient corresponding to the first PLC node in a preset offset list, and the preset offset list is used to store the correspondence relationship between the PLC node and the offset coefficient.
  • the embodiment of the present application provides a communication method.
  • the DSL transceiver uses the differential mode signal of the DSL in the DSL transceiver and slave
  • the common mode signal extracted above determines the cancellation coefficient corresponding to the first PLC node, which can make the cancellation coefficient more accurate, thereby effectively reducing the interference of the PLC node to the DSL node and improving the communication quality.
  • this method can also enable the newly accessed PLC node to quickly join the network to realize network services, and can also quickly reduce the interference of the PLC node to the DSL node.
  • the cancellation coefficient corresponding to the first PLC node can also be stored, so that when the first PLC node accesses the PLC transceiver for communication, the cancellation coefficient can be directly obtained without passing the cancellation coefficient.
  • the training is determined to quickly reduce the interference of PLC nodes to DSL nodes.
  • the DSL transceiver obtains the offset coefficient corresponding to the first PLC node from a preset offset list, and the offset list stores There is an offset coefficient corresponding to at least one PLC node.
  • the DSL transceiver can obtain the cancellation coefficient corresponding to the first PLC node from the preset cancellation list, so as to interfere with the first noise signal on the DSL signal without training the cancellation coefficient. Make sure to quickly reduce the interference from PLC nodes to DSL nodes.
  • the first PLC node shown above may include: one or more PLC nodes. If multiple nodes are included, obtaining the cancellation coefficient corresponding to the first PLC node by the DSL transceiver in S302 may include:
  • the DSL transceiver obtains the cancellation coefficient corresponding to each node, and according to the cancellation coefficient corresponding to each node, determines the second noise signal on the DSL signal For cancellation, the second noise signal is a noise signal generated by the PLC transceiver communicating with each node.
  • the DSL transceiver can obtain the offset coefficient corresponding to each node within the scheduling time period of each node, and then determine the offset coefficient corresponding to each node. The second noise signal on the DSL signal is cancelled.
  • the multiple nodes may include: the node that accesses the PLC transceiver for the first time, and/or the node that is not access to the PLC transceiver for the first time, each node may be the node that accesses the PLC transceiver for the first time. It may be a node that is not connected to the PLC transceiver for the first time.
  • the DSL transceiver can obtain the offset coefficient corresponding to each node in a similar manner as shown in Figure 4; if each node is not connected to the PLC transceiver for the first time If the first PLC node is not a node that accesses the PLC transceiver for the first time, the DSL transceiver can obtain the cancellation coefficient corresponding to each node in a similar manner.
  • the DSL transceiver can obtain the cancellation coefficient corresponding to each node during the scheduling time period of each node, and then according to the The cancellation coefficient corresponding to each node cancels the second noise signal on the DSL signal.
  • the method may further include:
  • the DSL transceiver starts on-line reconfiguration (OLR) and increases the signal to noise ratio margin (SNR Margin).
  • OLR on-line reconfiguration
  • SNR Margin signal to noise ratio margin
  • the DSL transceiver can reduce bit loading and increase SNR-Margin according to the noise in the current environment, that is, the noise in the current DSL signal, so as to maintain the stability of the line.
  • the communication method provided in this embodiment can enable the DSL transceiver to obtain the cancellation coefficient corresponding to each node in the scheduling time period of each node in the multiple nodes, and to determine the cancellation coefficient according to the cancellation coefficient corresponding to each node.
  • the second noise signal on the DSL signal is cancelled, which effectively reduces the interference of each of the multiple nodes to the DSL node and improves the communication quality.
  • the embodiments of the present application may further provide a communication method, which may identify the first PLC node before obtaining the offset coefficient corresponding to the first PLC node , To identify whether it is a node harmful to the DSL node.
  • Fig. 6 is a flowchart of a method for identifying harmful PLC nodes in a communication method provided by an embodiment of the application. As shown in FIG. 6, before the DSL transceiver obtains the cancellation coefficient corresponding to the first PLC node in S302, the method may further include:
  • the DSL transceiver determines whether the noise parameter of the DSL signal is equal to or exceeds a preset noise threshold.
  • the DSL transceiver obtains the cancellation coefficient corresponding to the first PLC node.
  • the noise threshold may be a preset threshold of noise parameters, which may be determined according to historical noise parameters, for example, noise parameters during communication with PLC nodes before the first PLC node.
  • the DSL transceiver can process the DSL signal to determine the noise parameter of the DSL signal.
  • the noise parameter may be, for example, any parameter such as the signal-to-noise ratio of the DSL signal and the noise power in the DSL signal.
  • the DSL transceiver can determine whether the first PLC node is a harmful node by determining whether the noise parameter of the DSL signal is equal to or exceeds the preset noise threshold, and if the noise parameter of the DSL signal is equal to or exceeds the preset noise threshold, If the noise threshold is set, it can be determined that the first PLC node is a harmful node, that is, the first PLC node has a greater noise interference to the DSL node; on the contrary, if the noise parameter of the DSL signal is less than the preset noise threshold, then It can be determined that the first PLC node is a non-harmful node, that is, the first PLC node has less noise interference to the DSL node.
  • the DSL transceiver can obtain the cancellation coefficient corresponding to the first PLC node, and then cancel the first noise signal on the DSL signal according to the cancellation coefficient corresponding to the first PLC node; Conversely, if the first PLC node is a non-hazardous node, the DSL transceiver may not need to obtain the cancellation coefficient corresponding to the first PLC node.
  • the DSL transceiver can perform the acquisition of the The offset coefficient corresponding to a PLC node; if the first PLC node is a harmful node, but is not a node that connects to the PLC transceiver for the first time, it can be determined that the first PLC node is an old harmful node, and the DSL transceiver can In the case where the first PLC node is not a node that accesses the PLC transceiver for the first time, the cancellation coefficient corresponding to each node is obtained in a similar manner.
  • the DSL transceiver may obtain the cancellation coefficient corresponding to the first PLC node when it is determined that the noise parameter of the DSL signal is equal to or exceeds the preset noise threshold, and then according to the The cancellation coefficient corresponding to the first PLC node cancels the first noise signal on the DSL signal, which can reduce the operation of the DSL transceiver and reduce power consumption while reducing the interference of the PLC node to the DSL node.
  • the communication method may further include:
  • the DSL transceiver sends the information of the first PLC node to the PLC transceiver.
  • the DSL transceiver may determine that the first PLC node is a harmful node. If the DSL transceiver determines that the PLC node is a harmful node, the DSL transceiver may also send the harmful node information to the PLC transceiver to inform the PLC transceiver. Then in this embodiment, the DSL transceiver can send the information of the first PLC node to the PLC transceiver.
  • the DSL transceiver sends the harmful node information to the PLC transceiver, such as the information of the first PLC node.
  • the PLC transceiver can accurately learn the harmful node among the connected nodes, so that the PLC transceiver can follow the harmful node information Reduce its interference impact on DSL nodes.
  • the communication method may further include:
  • the PLC transceiver sends scheduling information of at least one group to the DSL transceiver, where the scheduling information of each group includes: information about the scheduling time period of at least one PLC node in each group.
  • At least one PLC node in each group has only one second PLC node, and the second PLC node is a PLC node whose noise parameter of the DSL signal is equal to or exceeds the noise threshold during the communication process;
  • the PLC transceiver may, for example, group multiple PLC nodes connected to the PLC transceiver according to the information of at least one second PLC node to obtain the at least one group, so that at least one PLC node included in each group only has One of the second PLC nodes.
  • the second PLC node is a node that is harmful to the DSL node, that is, the noise parameter of the DSL signal during the communication process of each second PLC node is equal to or exceeds the noise threshold.
  • the at least one second PLC node is a harmful node among the plurality of PLC nodes connected to the PLC transceiver, and the at least one second PLC node may include the aforementioned first PLC node.
  • multiple PLC nodes are grouped, so that each group has only one harmful node.
  • the PLC transceiver may obtain scheduling information of the at least one group after grouping multiple PLC nodes.
  • the PLC transceiver can allocate scheduling resources to at least one PLC node of each group, so as to realize scheduling of PLC nodes in each group.
  • the scheduling resources may include resources such as scheduling time period and/or scheduling frequency.
  • the scheduling information of each group sent by the PLC transceiver to the DSL transceiver may at least include the information of the scheduling time period of the at least one PLC node in each group.
  • the DSL transceiver acquires the cancellation coefficient corresponding to the second PLC node in the scheduling time period of the second PLC node in each group.
  • Each group includes a second PLC node and other PLC nodes.
  • the second PLC node in each group may be the first scheduled PLC node in each group. If the second PLC node is the first scheduled PLC node of each group, the offset coefficient corresponding to the second PLC node is acquired during the scheduling time period of the second PLC node, so that the In the scheduling time period, the cancellation coefficient for interference cancellation or reduction, that is, the cancellation coefficient corresponding to the second PLC node, is obtained as early as possible, so as to reduce the interference of the second PLC node to the DSL node as quickly as possible.
  • the DSL transceiver cancels the third noise signal of the DSL signal according to the cancellation coefficient corresponding to the second PLC node within the scheduling time period of at least one PLC node in each group; the third noise signal The noise signal generated by the PLC transceiver communicating with the at least one PLC node.
  • the DSL transceiver may process the DSL signal according to the cancellation coefficient corresponding to the second PLC node within the scheduling time period of each group, so as to cancel the third noise signal in the DSL signal.
  • each group has only one second PLC node, and in the scheduling period of each group, the cancellation coefficient corresponding to the second PLC node is used for interference cancellation, that is, there is no need to perform the cancellation coefficient in each group.
  • the switching of the offset coefficient is required, which avoids frequent switching of the offset coefficient, effectively reduces or reduces the interference of the PLC node to the DSL node, and improves the communication quality.
  • the switching of the scheduling group may be: scheduling from the PLC nodes in one group to switching to scheduling the PLC nodes in another group.
  • FIG. 7 is a flowchart of another communication method provided by an embodiment of this application.
  • This figure 7 can illustrate the newly connected PLC node by way of example, so that the newly connected PLC node can join the network as quickly as possible and quickly offset its interference to the DSL node.
  • this communication method can include:
  • the PLC transceiver obtains scheduling information of PLC nodes in the PLC network, and sends the scheduling information to the DSL transceiver.
  • the PLC nodes in the PLC network may include: all nodes in the PLC network, and the PLC network may be a network formed by the PLC transceiver and the PLC nodes connected to the PLC transceiver.
  • the scheduling information of each PLC node may include: information of the scheduling time period of each PLC node, etc.
  • the PLC transceiver may include: a Powerline Domain Master (PDM) module, and the PDM module may execute the S701, that is, obtain scheduling information, and send the scheduling information to the DSL transceiver.
  • PDM Powerline Domain Master
  • the DSL transceiver starts OLR and improves the signal-to-noise ratio margin.
  • the PLC node that is connected for the first time start to transmit PLC signals.
  • the DSL transceiver determines whether the noise parameter of the DSL signal is equal to or exceeds a preset noise threshold during the scheduling time period of the PLC node that is accessed for the first time.
  • the PLC transceiver may, for example, send an enable signal to the cancellation module in the DSL transceiver during the scheduling time period of the PLC node that is accessed for the first time, so as to enable the cancellation module.
  • a trigger signal is sent to the cancellation module in the DSL transceiver to trigger the cancellation module in the DSL transceiver to measure the noise capability caused by the communication of the PLC node connected for the first time, if determined Whether the noise parameter of the DSL signal is equal to or exceeds the preset noise threshold, then it is determined whether the PLC node accessed for the first time is a harmful PLC node according to the comparison result.
  • the enabling of the cancellation module and the sending of the trigger signal can be realized by the PDM module of the PLC transceiver, for example.
  • the DSL transceiver may obtain the cancellation coefficient corresponding to the PLC node connected for the first time, and store the cancellation coefficient corresponding to the PLC node connected for the first time to a preset Offset list.
  • the DSL transceiver may, for example, use the method shown in FIG. 4 to train the cancellation coefficient to obtain the cancellation coefficient corresponding to the PLC node that is accessed for the first time.
  • the DSL transceiver processes the DSL signal according to the cancellation coefficient corresponding to the PLC node that is accessed for the first time to cancel the noise signal in the DSL signal deal with.
  • the DSL transceiver may repeat the above S704-S705 until the noise parameter of the DSL signal is less than the preset noise threshold, that is, the noise signal in the DSL signal is reduced as much as possible.
  • this method can make the PLC node that accesses for the first time join the network as quickly as possible to realize network services, and can quickly reduce or offset the interference of the PLC node to the DSL node, and improve the communication quality.
  • FIG. 8 is a flowchart of another communication method provided by an embodiment of this application.
  • This figure 8 can illustrate the multiple PLC nodes connected by an example, so as to switch the corresponding cancellation coefficient in the corresponding time period for each PLC node of the multiple PLC nodes to cancel the interference in the corresponding time period, such as As shown in Figure 8, the communication method may include:
  • the PLC transceiver obtains scheduling information of PLC nodes in the PLC network, and sends the scheduling information to the DSL transceiver.
  • the PLC nodes in the PLC network may include: all nodes in the PLC network, and the PLC network may be a network formed by the PLC transceiver and the PLC nodes connected to the PLC transceiver.
  • the scheduling information of each PLC node may include: information of the scheduling time period of each PLC node, etc.
  • the PLC transceiver may include: a power line main management (Powerline Domain Master, PDM) module, which can execute the S801 by the PDM, that is, obtain scheduling information, and send the scheduling information to the DSL transceiver.
  • PDM Powerline Domain Master
  • the DSL transceiver obtains the offset coefficient corresponding to each PLC node in the PLC network during the scheduling time period of each PLC node.
  • the PLC transceiver may send a trigger signal and the identification of each PLC node to the cancellation module in the DSL transceiver during the scheduling period of each PLC node, such as the CBTS or CFTS period, to trigger the
  • the cancellation module trains the cancellation coefficient according to the trigger signal and the identification of each PLC node to obtain the cancellation coefficient corresponding to each PLC node.
  • the DSL transceiver processes the DSL signal according to the cancellation coefficient corresponding to each PLC node, so as to cancel the noise signal in the DSL signal.
  • the DSL transceiver processes the DSL signal according to the cancellation coefficient corresponding to the PLC node to cancel the noise signal generated by the communication of the PLC node in the DSL signal. ; During the scheduling time period of another PLC node, the DSL transceiver processes the DSL signal according to the cancellation coefficient corresponding to the other PLC node to perform the noise signal generated by the communication of the other PLC node in the DSL signal Offset processing.
  • the DSL transceiver can switch the offset coefficient, that is, switch from the offset coefficient corresponding to the one PLC node to the The offset coefficient corresponding to another PLC node.
  • This method can process the DSL signal according to the cancellation coefficient corresponding to each PLC node within the scheduling time period of each PLC node to cancel the noise signal in the DSL signal, so that the DSL transceiver can In the corresponding scheduling time period, the corresponding cancellation coefficient is used for processing, which effectively reduces the interference of each PLC node to the DSL node.
  • Fig. 9 is a flowchart of yet another communication method provided by an embodiment of the application.
  • This figure 9 can illustrate the multiple PLC nodes that are connected to group multiple PLC nodes so that there is only one harmful node in each group, and then there is no need to cancel the coefficient during the scheduling period of each group. For the handover, the interference can be reduced or cancelled by processing the cancellation coefficients corresponding to the harmful nodes included in each group.
  • the communication method may include:
  • the PLC transceiver groups multiple connected PLC nodes to obtain at least one group.
  • Each group includes at least one PLC node, among which there is only one node harmful to the DSL node.
  • the harmful node is a PLC node whose noise parameter of the DSL signal is equal to or exceeds the noise threshold in the communication process among the multiple PLC nodes.
  • the PLC transceiver sends the scheduling information of each group to the DSL transceiver, where the scheduling information of each group includes: information about the scheduling time period of the at least one PLC node in each group.
  • the PLC transceiver learns the scheduling information of the multiple PLC nodes and also learns the harmful node information among the multiple PLC nodes.
  • the DSL transceiver obtains the cancellation coefficient corresponding to the harmful node in each group during the scheduling time period of the harmful node.
  • the PLC transceiver also sends a trigger signal and the identification of the PLC node in each group to the cancellation module of the DSL transceiver, so that the cancellation module of the DSL transceiver can be based on the trigger signal and the PLC node in each group.
  • Identification to determine whether each PLC node in each group is a harmful node, and if it is a harmful node, obtain the offset coefficient corresponding to the harmful node.
  • whether each PLC node is harmful may be: whether the noise parameter of the DSL signal is equal to or exceeds a preset noise threshold during the communication process of each PLC node, and if it is equal to or exceeds the noise threshold, the PLC can be determined The node is a harmful node. Conversely, if it is less than the noise threshold, the PLC node can be determined to be a non-harmful node.
  • the DSL transceiver processes the DSL signal according to the cancellation coefficient corresponding to the harmful node in the scheduling time period of each group, so as to cancel the noise signal in the DSL signal.
  • the communication method provided in this embodiment can use the cancellation coefficient corresponding to the harmful node for interference cancellation in the scheduling time period of each group, that is, there is no need to switch the cancellation coefficient in each group, but only in the scheduling period.
  • group switching it is necessary to switch the offset coefficient, avoid frequent switching of the offset coefficient, effectively reduce or reduce the interference of the PLC node to the DSL node, and improve the communication quality.
  • the switching of the scheduling group may be: scheduling from the PLC nodes in one group to switching to scheduling the PLC nodes in another group.
  • the embodiment of the present application may also provide a communication device.
  • the communication device can be applied to a system including a PLC transceiver and a DSL transceiver, the PLC transceiver is connected to the DSL transceiver, the PLC transceiver is connected to network equipment in the upstream, and the PLC transceiver is connected to one or more PLCs in the downstream Node, the DSL transceiver is connected to the network equipment in the upstream, and the DSL transceiver is connected to the DSL node in the downstream.
  • FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of this application. As shown in FIG. 10, the communication device may include: a first module 101 for the PLC transceiver, and a second module 102 for the DSL transceiver.
  • the first module 101 is configured to control the PLC transceiver to send first scheduling information to the DSL transceiver, where the first scheduling information includes information about the scheduling time period of the first PLC node among the one or more PLC nodes;
  • the second module 102 is configured to control the DSL transceiver to obtain the cancellation coefficient corresponding to the first PLC node during the scheduling time period of the first PLC node, and to perform the correction of the DSL signal according to the cancellation coefficient corresponding to the first PLC node
  • the first noise signal above is cancelled, the DSL signal is a transmission signal between the DSL transceiver and the DSL node, and the first noise signal is a noise signal generated by the communication between the PLC transceiver and the first PLC node.
  • the first PLC node is: a node that accesses the PLC transceiver for the first time;
  • the second module 102 is specifically configured to control the DSL transceiver to determine the cancellation coefficient corresponding to the first PLC node according to the differential mode signal of the DSL in the DSL transceiver and the common mode signal extracted from the DSL.
  • the second module 102 is further configured to control the DSL transceiver to store the offset coefficient corresponding to the first PLC node in a preset offset list.
  • the second module 102 is specifically configured to control the DSL transceiver to obtain the cancellation coefficient corresponding to the first PLC node from a preset cancellation list, and the cancellation list stores the cancellation coefficient corresponding to at least one PLC node.
  • the first PLC node includes: multiple nodes connected to the PLC transceiver;
  • the second module 102 is specifically configured to control the DSL transceiver to obtain the cancellation coefficient corresponding to each node within the scheduling time period of each node in the multiple nodes, and to determine the cancellation coefficient corresponding to each node
  • the second noise signal on the DSL signal is cancelled, and the second noise signal is a noise signal generated by the PLC transceiver communicating with each node.
  • the second module 102 is further configured to control the DSL transceiver to determine whether the noise parameter of the DSL signal is equal to or exceeds during the communication process of the first PLC node before obtaining the cancellation coefficient corresponding to the first PLC node The preset noise threshold; if yes, obtain the cancellation coefficient corresponding to the first PLC node.
  • the second module 102 is also used to control the DSL transceiver to send the information of the first PLC node to the PLC transceiver.
  • the first module 101 is further configured to control the PLC transceiver to send scheduling information of at least one group to the DSL transceiver, and the scheduling information of each group includes: the scheduling time of at least one PLC node in each group Segment information; at least one PLC node in each group has only one second PLC node, and the second PLC node is the PLC node whose noise parameter of the DSL signal during the communication process is equal to or exceeds the noise threshold;
  • the second module 102 is also used to control the DSL transceiver to obtain the offset coefficient corresponding to the second PLC node in the scheduling time period of the second PLC node in each group; at least one PLC in each group During the scheduling period of the node, the third noise signal of the DSL signal is cancelled according to the cancellation coefficient corresponding to the second PLC node; the third noise signal is generated by the PLC transceiver communicating with the at least one PLC node Noise signal.
  • the second module 102 is further configured to control the DSL transceiver to start the online reconfiguration OLR at the beginning of the scheduling time period and increase the signal-to-noise ratio margin.
  • the communication device provided by the embodiment of the present application can execute the communication method shown in any of the above-mentioned Figures 3-9, and its specific implementation process and effective effects, etc., refer to the above, and will not be repeated here.
  • the embodiment of the present application may also provide a communication system.
  • a communication system including a PLC transceiver and a DSL transceiver.
  • the specific form of the communication system may be a system form of equipment, that is, a PLC transceiver And DSL transceiver as a device respectively, thus forming a system.
  • the communication system can also be in the form of equipment, that is, the PLC transceiver and the DSL transceiver are respectively used as internal components of the equipment. Regardless of the form, the communication system can be used to implement any of the communication methods shown in FIGS. 3-9.
  • FIG. 11 is a schematic structural diagram of a communication system provided by an embodiment of this application.
  • the communication system may include: a system of a PLC transceiver 111 and a DSL transceiver 112.
  • the PLC transceiver 111 includes: a first network interface 1111, a PLC interface 1112, a first processor 1113, and a first transmission interface 1114.
  • the first network interface 1111, the PLC interface 1112, and the first transmission interface 1114 are respectively connected to the first processor 1113, the first network interface 1111 is connected to the network device connected in the uplink, and the PLC interface 1112 is connected to one or more PLC node connection;
  • the DSL transceiver 112 includes: a second network interface 1121, a DSL interface 1122, a second processor 1123, and a second transmission interface 1124.
  • the second network interface 1121, the DSL interface 1122, and the second transmission interface 1124 are connected to the first The second processor 1123 is connected; the first transmission interface 1114 is also connected to the second transmission interface 1124.
  • the first transmission interface 1114 is configured to send first scheduling information to the second transmission interface 1124, where the first scheduling information includes information about the scheduling time period of the first PLC node among the one or more PLC nodes.
  • the second transmission interface 1124 is used to receive the first scheduling information.
  • the second processor 1123 is configured to obtain the cancellation coefficient corresponding to the first PLC node within the scheduling time period of the first PLC node, and to determine the first PLC node on the DSL signal according to the cancellation coefficient corresponding to the first PLC node.
  • the noise signal is cancelled, the DSL signal is a transmission signal between the DSL transceiver and the DSL node, and the first noise signal is a noise signal generated by the communication between the PLC transceiver and the first PLC node.
  • the second processor 1123 is specifically configured to determine the differential mode signal of the DSL in the DSL transceiver and the common mode signal extracted from the DSL. To determine the offset coefficient corresponding to the first PLC node.
  • the second processor 1123 is further configured to store the offset coefficient corresponding to the first PLC node in a preset offset list.
  • the second processor 1123 is specifically configured to obtain the offset coefficient corresponding to the first PLC node from a preset offset list, and the An offset coefficient corresponding to at least one PLC node is stored in the offset list.
  • the second processor 1123 is specifically configured to obtain the multiple nodes within the scheduling time period of each node in the multiple nodes The cancellation coefficient corresponding to each node, and the second noise signal on the DSL signal is cancelled according to the cancellation coefficient corresponding to each node, and the second noise signal is generated by the PLC transceiver communicating with each node Noise signal.
  • the second processor 1123 is further configured to determine whether the noise parameter of the DSL signal is equal to or exceeds a preset noise during the communication process of the first PLC node before obtaining the cancellation coefficient corresponding to the first PLC node Threshold; if yes, obtain the offset coefficient corresponding to the first PLC node.
  • the second transmission interface 1124 is further configured to send information of the first PLC node to the first transmission interface 1114;
  • the first transmission interface 1114 is also used to receive information of the first PLC node.
  • the first transmission interface 1114 is further configured to send scheduling information of at least one group to the second transmission interface 1124, and the scheduling information of each group includes: information about the scheduling time period of at least one PLC node in each group ; At least one PLC node in each group has only one second PLC node, and the second PLC node is a PLC node whose noise parameter of the DSL signal is equal to or exceeds the noise threshold during the communication process;
  • the second processor 1123 is further configured to obtain the offset coefficient corresponding to the second PLC node in the scheduling time period of the second PLC node in each group; the scheduling time of at least one PLC node in each group In the segment, the third noise signal of the DSL signal is cancelled according to the cancellation coefficient corresponding to the second PLC node; the third noise signal is the noise signal generated by the communication between the PLC transceiver and the at least one PLC node.
  • the second processor 1123 is further configured to start the online reconfiguration OLR at the beginning of the scheduling period before acquiring the offset coefficient corresponding to the first PLC node, and increase the signal-to-noise ratio margin.
  • the PLC transceiver 111 may further include a first storage medium to store computer program instructions to make the first processor 1113 call the computer program stored in the first storage medium
  • the instruction realizes the communication method executed by the PLC transceiver shown in any of the above-mentioned Figures 3-9.
  • the DSL transceiver 112 may further include a second storage medium to store computer program instructions, so that the second processor 1123 can call the computer program instructions stored in the second storage medium to implement the foregoing
  • the product form of the communication system shown in FIG. 11 may be a device form, that is, the communication system may be a communication device, such as a gateway device.
  • the communication system provided by the embodiment of the present application can execute the communication method shown in any one of the above-mentioned Figures 3-9, and its specific implementation process and effective effects, etc., refer to the above, and will not be repeated here.
  • the embodiment of the present application may also provide a chip system.
  • the first chip and the second chip included in the chip system can be applied to PLC transceivers and DSL transceivers, respectively.
  • the chip system provided by this application may include: a first chip and a second chip, the first chip includes a first processing module and a first communication interface, and the second chip includes a second processing module and a second communication module.
  • the module is used to execute the communication method performed by the PLC transceiver described in any of the above-mentioned Figures 3-9
  • the second processing module is used to execute the communication method performed by any of the above-mentioned DSL transceivers in Figure 3-9 .
  • the first chip further includes a first storage module (for example, a memory), the storage module is used to store instructions, the first processing module is used to execute instructions stored in the first storage module, and store information in the first storage module
  • the execution of the instruction of the first processing module causes the first processing module to execute the communication method executed by the PLC transceiver described in any of the above-mentioned figures 3-9
  • the second chip also includes a second storage module (such as a memory), a second storage module Used to store instructions, the second processing module is used to execute the instructions stored in the second storage module, and the execution of the instructions stored in the second storage module causes the second processing module to execute any of the above-mentioned figures 3-9
  • the communication method performed by the DSL transceiver is used to store instructions
  • the first processing module is used to execute instructions stored in the first storage module, and store information in the first storage module
  • the execution of the instruction of the first processing module causes the first processing module to execute the communication method executed by the PLC transceiver described in any of the
  • the embodiment of the present application may also provide a chip.
  • the chip may be an integrated chip or a distributed chip inside the communication system, which may be applied to a gateway device, for example.
  • the chip provided by the embodiment of the present application may include a processing module and a communication interface, and the processing module can execute the communication method described in any one of FIGS. 3-9.
  • the chip further includes a storage module (such as a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module causes the processing module to execute the above diagram.
  • a storage module such as a memory
  • the storage module is used to store instructions
  • the processing module is used to execute the instructions stored in the storage module
  • the execution of the instructions stored in the storage module causes the processing module to execute the above diagram.
  • embodiments of the present application may also provide a computer storage system.
  • An embodiment of the present application also provides a computer storage system, which may include: a first storage medium and a second storage medium, where the first storage medium stores a first computer program, and the second storage medium stores a second computer program;
  • the first computer program is used to implement the communication method executed by the PLC transceiver described in any one of FIGS. 3 to 9 when being executed by the processor of the power line communication PLC transceiver; the second computer program is used to When executed by the processor of the digital subscriber line DSL transceiver, the communication method executed by the DSL transceiver described in any one of FIGS. 3 to 9 is realized.
  • the embodiments of the present application may also provide a computer storage medium on which a computer program is stored, and the computer program is used to implement the above-mentioned figures 3-9 when executed by the processor. Any of the communication methods described.
  • the embodiment of the present application may also provide a computer program for executing the communication method described in any one of Figures 3 to 9 when called by a processor.
  • the computer program may include a first program and a second program, where the first program can be used to be executed by a processor to implement the communication method executed by the PLC transceiver described in any of the above-mentioned Figure 3-9 , Where the second program can be used to implement the communication method executed by the DSL transceiver described in any one of FIGS. 3 to 9 when the second program is executed by the processor.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean that B is determined only according to A, and B can also be determined according to A and/or other information.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • And/or describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are in an “or” relationship.
  • "The following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a).
  • At least one of a, b, or c can mean: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative, for example, the division of units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated. To another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another.
  • the storage medium may be any available medium that can be accessed by a computer.
  • computer readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or can be used to carry or store commands or data structures
  • Any connection can suitably become a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave
  • coaxial cable , Fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless and microwave are included in the fixing of the media.
  • Disk and disc include compact discs (CD), laser discs, optical discs, digital versatile discs (DVD), floppy discs and Blu-ray discs. Disks usually copy data magnetically, while discs The laser is used to optically copy data. The above combination should also be included in the protection scope of the computer-readable medium.

Abstract

本申请实施例提供一种通信方法、装置、系统及存储介质,该方法包括PLC收发器向该DSL收发器发送调度信息,调度信息包括PLC节点的调度时间段的信息;在PLC节点的调度时间段内,DSL收发器获取PLC节点对应的抵消系数,并根据PLC节点对应的抵消系数,对DSL信号的噪声信号进行抵消,可减小PLC节点对DSL节点的干扰,保证网络传输质量。

Description

通信方法、装置、系统及存储介质 技术领域
本申请涉及通信技术,尤其涉及一种通信方法、装置、系统及存储介质。
背景技术
经过多年的发展,数字用户线(Digital Subscriber Line,DSL)技术已经成为电信领域的主流接入技术。电力线通信(Power Line Communication,PLC)技术可利用电力线传输数据和语音信号的一种通信方式,可包括:高压电力线通信、中压电力线通信和室内电力线通信。
由于电力线通信无需任何额外的线路铺设,具有即插即用等优点,使得室内电力线通信在室内网络拓展中得到了较大应用。在PLC的典型应用场景中,可包括DSL节点以实现互联网的接入,以及PLC节点以实现网络拓展。由于PLC系统和DSL系统尤其是G.FAST系统存在较大的频谱重叠,使用时很容易产生相互干扰。
发明内容
本申请实施例提供一种通信方法、装置、系统及存储介质,以减小PLC节点对DSL节点的干扰,保证网络传输质量。
第一方面,本申请实施例提供一种通信方法,该通信方法应用于包括:电力线通信PLC收发器和数字用户线DSL收发器的系统,其中,该PLC收发器和该DSL收发器连接,该PLC收发器上行接入网络设备,该PLC收发器下行接入一个或多个PLC节点,该DSL收发器上行接入该网络设备,该DSL收发器下行接入DSL节点,该通信方法可包括:
该PLC收发器向该DSL收发器发送第一调度信息,该第一调度信息包括该一个或多个PLC节点中第一PLC节点的调度时间段的信息;
在该第一PLC节点的调度时间段内,该DSL收发器获取该第一PLC节点对应的抵消系数,并根据该第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消,该DSL信号为该DSL收发器与DSL节点之间的传输信号,该第一噪声信号为该PLC收发器与该第一PLC节点通信所产生的噪声信号。
在一种实现方式中,该第一PLC节点为:首次接入该PLC收发器的节点,如上所示的DSL收发器获取该第一PLC节点对应的抵消系数,可包括:
该DSL收发器根据该DSL收发器中DSL的差模信号和从该DSL上提取的共模信号,确定该第一PLC节点对应的抵消系数。
该通信方法可在第一PLC节点为首次接入该PLC收发器的节点的情况下,由该DSL收发器根据该DSL收发器中DSL的差模信号和从该DSL上提取的共模信号,确定该第一PLC节点对应的抵消系数,可使得抵消系数更准确,从而有效降低PLC节点对DSL节点的干扰,提高通信质量。并且,该方法,还可使得新接入的PLC节点既能快速加入网络, 实现网络服务,也可快速降低该PLC节点对DSL节点的干扰。
在另一种实现方式中,该通信方法还可包括:
该DSL收发器将该第一PLC节点对应的抵消系数存储至预设的抵消列表中。
该方法中,可将该第一PLC节点对应的抵消系数进行存储,以便于后续该第一PLC节点接入该PLC收发器进行通信时,直接获取该抵消系数即可,而无需通过抵消系数的训练进行确定,从而快速地降低PLC节点对DSL节点的干扰。
在又一种实现方式中,该第一PLC节点为非首次接入该PLC收发器的节点,该DSL收发器获取该第一PLC节点对应的抵消系数,包括:
该DSL收发器从预设的抵消列表中获取该第一PLC节点对应的抵消系数,该抵消列表中存储有至少一个PLC节点对应的抵消系数。
该实施例的方案中,DSL收发器可从预设的抵消列表中,获取第一PLC节点对应的抵消系数,用以对DSL信号上该第一噪声信号进行干扰,而无需通过抵消系数的训练进行确定,从而快速地降低PLC节点对DSL节点的干扰。
在再一种实现方式中,如上第一PLC节点可以包括:接入该PLC收发器的多个节点。
如上所示的通信方法中,在该第一PLC节点的调度时间段内,该DSL收发器获取该第一PLC节点对应的抵消系数,并根据该第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消,包括:
在该多个节点中每个节点的调度时间段内,该DSL收发器获取该每个节点对应的抵消系数,并根据该每个节点对应的抵消系数,对该DSL信号上的第二噪声信号进行抵消,该第二噪声信号为该PLC收发器与该每个节点通信所产生的噪声信号。
在再一种实现方式中,在如上所示的DSL收发器获取该第一PLC节点对应的抵消系数之前,该方法还可包括:
该DSL收发器确定该第一PLC节点通信过程中,该DSL信号的噪声参数是否等于或超过预设的噪声阈值;
若是,则该DSL收发器获取该第一PLC节点对应的抵消系数。
在再一种实现方式中,该通信方法还可包括:
该DSL收发器还向该PLC收发器发送该第一PLC节点的信息。
在再一种实现方式中,该通信方法还可包括:
该PLC收发器向该DSL收发器发送至少一个组的调度信息,每个组的调度信息包括:该每个组内至少一个PLC节点的调度时间段的信息;该每个组内至少一个PLC节点中,仅具有一个第二PLC节点,该第二PLC节点为通信过程中该DSL信号的噪声参数等于或超过该噪声阈值的PLC节点;
该DSL收发器在该每个组内该第二PLC节点的调度时间段内,获取该第二PLC节点对应的抵消系数;
该DSL收发器在该每个组内至少一个PLC节点的调度时间段内,根据该第二PLC节点对应的抵消系数,对该DSL信号的第三噪声信号进行抵消;该第三噪声信号为该PLC收发器与该至少一个PLC节点通信所产生的噪声信号。
由于每个组仅具有一个第二PLC节点,而在每个组的调度时间段内,均采用该第二PLC节点对应的抵消系数进行干扰抵消,即在该每个组内无需进行抵消系数的切换,而只 有在调度组切换的情况下,才需进行抵消系数的切换,避免了抵消系数的频繁切换,有效降低或减少PLC节点对DSL节点的干扰,提高通信质量。
在再一种实现方式中,在上述DSL收发器获取该第一PLC节点对应的抵消系数之前,该通信方法还可包括:
在该调度时间段的开始时刻,该DSL收发器启动在线重配置OLR,并调高信噪比裕度。
该通信方法,可使得DSL收发器在该多个节点中每个节点的调度时间段内,获取该每个节点对应的抵消系数,并根据该每个节点对应的抵消系数,对该DSL信号上的第二噪声信号进行抵消,有效降低该多个节点中每个节点对DSL节点的干扰,提高通信质量。
在再一种实现方式中,如上所示的该调度时间段为竞争基础的时隙CBTS,或者,自由竞争的时隙CFTS。
第二方面,本申请实施例还可提供一种通信装置,该通信装置可适用于包括电力线通信PLC收发器和数字用户线DSL收发器的系统,该PLC收发器和该DSL收发器连接,该PLC收发器上行接入网络设备,该PLC收发器下行接入一个或多个PLC节点,该DSL收发器上行接入该网络设备,该DSL收发器下行接入DSL节点;该通信装置可包括:用于该PLC收发器的第一模块,和用于该DSL收发器的第二模块;
其中,第一模块,用于控制该PLC收发器向该DSL收发器发送第一调度信息,该第一调度信息包括该一个或多个PLC节点中第一PLC节点的调度时间段的信息;
第二模块,用于在该第一PLC节点的调度时间段内,控制DSL收发器获取该第一PLC节点对应的抵消系数,并根据该第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消,该DSL信号为该DSL收发器与DSL节点之间的传输信号,所述第一噪声信号为所述PLC收发器与所述第一PLC节点通信所产生的噪声信号。
在一种实现方式中,该第一PLC节点为:首次接入该PLC收发器的节点;
如上所示的第二模块,具体用于控制DSL收发器根据该DSL收发器中DSL的差模信号和从该DSL上提取的共模信号,确定该第一PLC节点对应的抵消系数。
在另一种实现方式中,如上所述的该第二模块,还用于控制DSL收发器将该第一PLC节点对应的抵消系数存储至预设的抵消列表中。
在又一种实现方式中,如上所示的第二模块,具体用于控制DSL收发器从预设的抵消列表中获取该第一PLC节点对应的抵消系数,该抵消列表中存储有至少一个PLC节点对应的抵消系数。
在再一种实现方式中,该第一PLC节点包括:接入该PLC收发器的多个节点;
该第二模块,具体用于在该多个节点中每个节点的调度时间段内,控制DSL收发器获取该每个节点对应的抵消系数,并根据该每个节点对应的抵消系数,对该DSL信号上的第二噪声信号进行抵消,该第二噪声信号为该PLC收发器与该每个节点通信所产生的噪声信号。
在再一种实现方式中,第二模块,还用于在获取该第一PLC节点对应的抵消系数之前,控制DSL收发器确定该第一PLC节点通信过程中,该DSL信号的噪声参数是否等于或超过预设的噪声阈值;若是,则获取该第一PLC节点对应的抵消系数。
在再一种实现方式中,第二模块,还用于控制DSL收发器向该PLC收发器发送该第 一PLC节点的信息。
在再一种实现方式中,第一模块,还用于控制PLC收发器向DSL收发器发送至少一个组的调度信息,每个组的调度信息包括:该每个组内至少一个PLC节点的调度时间段的信息;该每个组内至少一个PLC节点中,仅具有一个第二PLC节点,该第二PLC节点为通信过程中该DSL信号的噪声参数等于或超过所述噪声阈值的PLC节点;
该第二模块,还用于在该每个组内该第二PLC节点的调度时间段内,控制DSL收发器获取该第二PLC节点对应的抵消系数;在该每个组内至少一个PLC节点的调度时间段内,根据该第二PLC节点对应的抵消系数,对该DSL信号的第三噪声信号进行抵消;该第三噪声信号为该PLC收发器与该至少一个PLC节点通信所产生的噪声信号。
在再一种实现方式中,第二模块,还用于在所述调度时间段的开始时刻,控制DSL收发器启动在线重配置OLR,并调高信噪比裕度。
第三方面,本申请实施例还可提供一种通信系统,包括:电力线通信PLC收发器和数字用户线DSL收发器的系统,其中,该PLC收发器包括:第一网络接口、PLC接口、第一处理器和第一传输接口,该第一网络接口、该PLC接口和该第一传输接口分别与该第一处理器连接,该第一网络接口与上行接入的网络设备连接,该PLC接口与下行接入的一个或多个PLC节点连接;该DSL收发器包括:第二网络接口、DSL接口、第二处理器和第二传输接口,该第二网络接口、该DSL接口和该第二传输接口分别与该第二处理器连接;该第一传输接口还与该第二传输接口连接;
该第一传输接口,用于向该第二传输接口发送第一调度信息,该第一调度信息包括该一个或多个PLC节点中第一PLC节点的调度时间段的信息;
该第二传输接口,用于接收该第一调度信息;
该第二处理器,用于在该第一PLC节点的调度时间段内,获取该第一PLC节点对应的抵消系数,并根据该第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消,该DSL信号为该DSL收发器与DSL节点之间的传输信号,该第一噪声信号为该PLC收发器与该第一PLC节点通信所产生的噪声信号。
在一种实现方式中,该第一PLC节点为首次接入该PLC收发器的节点。
第二处理器,具体用于根据该DSL收发器中DSL的差模信号和从该DSL上提取的共模信号,确定该第一PLC节点对应的抵消系数。
在另一种实现方式中,第二处理器,还用于将该第一PLC节点对应的抵消系数存储至预设的抵消列表中。
在又一种实现方式中,该第一PLC节点为非首次接入该PLC收发器的节点,
该第二处理器,具体用于从预设的抵消列表中获取该第一PLC节点对应的抵消系数,该抵消列表中存储有至少一个PLC节点对应的抵消系数。
在再一种实现方式中,若该第一PLC节点包括:接入所述PLC收发器的多个节点,则该第二处理器,具体用于在该多个节点中每个节点的调度时间段内,获取该每个节点对应的抵消系数,并根据该每个节点对应的抵消系数,对该DSL信号上的第二噪声信号进行抵消,该第二噪声信号为该PLC收发器与该每个节点通信所产生的噪声信号。
在再一种实现方式中,第二处理器,还用于在获取该第一PLC节点对应的抵消系数之前,确定该第一PLC节点通信过程中,该DSL信号的噪声参数是否等于或超过预设的噪 声阈值;若是,则获取该第一PLC节点对应的抵消系数。
在再一种实现方式中,如上所示的该第二传输接口,还用于向该第一传输接口发送该第一PLC节点的信息;
该第一传输接口,还用于接收该第一PLC节点的信息。
在再一种实现方式中,第一传输接口,还用于向该第二传输接口发送至少一个组的调度信息,每个组的调度信息包括:该每个组内至少一个PLC节点的调度时间段的信息;该每个组内至少一个PLC节点中,仅具有一个第二PLC节点,该第二PLC节点为通信过程中该DSL信号的噪声参数等于或超过该噪声阈值的PLC节点;
第二处理器,还用于在该每个组内该第二PLC节点的调度时间段内,获取该第二PLC节点对应的抵消系数;在该每个组内至少一个PLC节点的调度时间段内,根据该第二PLC节点对应的抵消系数,对该DSL信号的第三噪声信号进行抵消;该第三噪声信号为该PLC收发器与该至少一个PLC节点通信所产生的噪声信号。
在再一种实现方式中,第二处理器,还用于在获取该第一PLC节点对应的抵消系数之前,在该调度时间段的开始时刻,启动在线重配置OLR,并调高信噪比裕度。
在再一种实现方式中,如上所示的通信系统为通信设备,如网关设备。
第四方面,本申请实施例还提供一种计算机存储系统,包括:第一存储介质和第二存储介质,其中,第一存储介质存储有第一计算机程序,第二存储介质存储有第二计算机程序;
该第一计算机程序用以在被电力线通信PLC收发器的处理器执行时,实现上述第一方面中该PLC收发器执行的通信方法;
该第二计算机程序用以在被数字用户线DSL收发器的处理器执行时,实现上述第一方面中DSL收发器执行的通信方法。
第五方面,本申请实施例还提供一种计算机存储介质,其上存储有计算机程序,该计算机程序用以在处理器执行时,实现上述第一方面中的通信方法。
第六方面,本申请实施例还提供一种计算机程序,用以被处理器调用时执行上述第一方面的通信方法。
第七方面,本申请实施例还提供一种芯片系统,包括:第一芯片和第二芯片,第一芯片包括第一处理模块和第一通信接口,第二芯片包括第二处理模块和第二通信模块,该第一处理模块,用于执行上述第一方面中PLC收发器执行的通信方法,该第二处理模块,用于执行上述第二方面中DSL收发器执行的通信方法。
可选地,该第一芯片还包括第一存储模块(如,存储器),存储模块用于存储指令,第一处理模用于执行第一存储模块存储的指令,并且对第一存储模块中存储的指令的执行使得第一处理模块执行第一方面中任一所述的PLC收发器执行的通信方法;该第二芯片还包括第二存储模块(如,存储器),第二存储模块用于存储指令,第二处理模块用于执行第二存储模块存储的指令,并且对第二存储模块中存储的指令的执行使得第二处理模块执行第一方面中任一所述的DSL收发器执行的通信方法。
第八方面,本申请实施例提供了一种芯片,包括:处理模块与通信接口,该处理模块能执行第一方面任一所述的通信方法。
可选地,该芯片还包括存储模块(如,存储器),存储模块用于存储指令,处理模块 用于执行存储模块存储的指令,并且对存储模块中存储的指令的执行使得处理模块执行第一方面中任一所述的通信方法。
本申请实施例提供的通信方法、装置、系统及存储介质,可通过网关设备中的PLC收发器向该网关设备中的DSL收发器发送第一PLC节点的调度信息,该第一PLC节点的调度信息包括该第一PLC节点的调度时间段的信息,在该第一PLC节点的调度时间段内,由该DSL收发器获取该第一PLC节点对应的抵消系数,并根据该第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消,该DSL信号为该DSL收发器与DSL节点之间的传输信号,该第一噪声信号为该PLC收发器与该第一PLC节点通信所产生的噪声信号。该方法中,DSL收发器可在第一PLC节点的调度时间段内,获取该第一PLC节点对应的抵消系数,并根据该第一PLC节点对应的抵消系数,对DSL信号上的由于第一PLC节点产生的第一噪声信号进行抵消,可有效降低PLC节点对DSL节点的干扰,提高通信质量。
附图说明
图1为本申请实施例提供的一种PLC应用网络的场景示意图;
图2为本申请实施例提供的一种网关设备的结构示意图;
图3为本申请实施例提供的一种通信方法的流程图;
图4为本申请实施例提供的一种通信方法中获取第一PLC节点对应的抵消系数的方法流程图;
图5为本申请实施例提供的另一种网关设备的结构示意图;
图6为本申请实施例提供的一种通信方法中有害PLC节点的识别方法的流程图;
图7为本申请实施例提供的另一种通信方法的流程图;
图8为本申请实施例提供的又一种通信方法的流程图;
图9为本申请实施例提供的再一种通信方法的流程图;
图10为本申请实施例提供的通信装置的结构示意图;
图11为本申请实施例提供的一种通信系统的结构示意图。
具体实施方式
本申请实施例所提供的通信方法可适用基于室内电力线通信的PLC应用网络中,其中,室内电力线通信可以为390/220V的电力线通信。如下结合附图对本申请实施例所涉及的PLC应用网络、其所涉及的PLC技术以及DSL技术等技术术语进行示例说明。图1为本申请实施例提供的一种PLC应用网络的场景示意图。如图1所示,PLC应用网络中包括:至少一个网络接口以及至少一个电力线接口。其中,网络接口可以为图1中符合电通信连接单元(TAE)标准的电话接口(phone jack),其用以接收网络信号,实现外部网络的接入。其中,TAE为德文Telekommunikations-Anschluss-Einheit的简写,其对应的英文为telecommunications connection unit。电力线接口可以为电力线插座,例如图1所示的A、B、C、D、E、F位置的电力线插座,可用以连接PLC节点又称PLC设备或PLC终端,可使得位于室内不同位置的PLC节点实现上网功能。
在实际应用中,可将网关设备或者通信系统中的DSL收发器连接于图1中所示的网络接口处,以接收网络信号如DSL信号,还将该网关设备或者通信系统中的PLC收发器与一个电力线插座连接,并将DSL信号调制为PLC信号后,传输至该电力线插座或者其它电力线插座连接的PLC节点,或者,接收PLC节点传输的PLC信号,并将PLC信号调制为DSL信号后,传输至外部网络,从而实现PLC节点的网络功能。
由于该网关设备或者通信系统中的DSL收发器可接收DSL信号,该网关设备或者通信系统中的DSL收发器还可将该DSL信号传输至DSL节点,以实现DSL节点的网络功能。
如上所涉及的PLC节点还可称为PLC设备,其可以为支持PLC技术的终端设备,如支持PLC技术的室内交流用电设备。其中,该支持PLC技术的室内交流用电设备例如包括:电视机、洗衣机、冰箱、机顶盒、投影仪、音箱等任一设备。
如上所涉及的DSL节点例如可以为支持DSL技术的终端设备,如具有DSL接口的设备。其中,该具有DSL接口的设备例如可以为台式电脑、笔记本电脑、服务器、交换机等任一设备。
在传统的DSL技术中,由于DSL信号需从局端的DSL收发器通过电话线即双绞线(Twist Pair,TP)传输至用户端的DSL收发器,其DSL信号的传输距离较长,频谱较窄,通常采用频分双工(Frequency Division Duplexing,FDD)的方式进行DSL信号的传输以避免上下行信号之间的相互干扰。对于下一代的DSL技术,如采用铜线宽带接入的DSL技术又称超高速DSL(G.Fast)技术,由于频谱的扩展(频带高达205MHz),为降低对模拟前端设计的要求,可采用时分复用(Time Division Duplexing,TDD)的双工方式进行DSL信号的传输。其中,传统的DSL技术例如可以为非对称数字用户线(Asymmetric Digital Subscriber Line,ADSL)、甚高速数字用户线(Very-high-bit-rate Digital Subscriber Line,VDSL)、甚高速数字用户线2(Very-high-bit-rate Digital Subscriber Line 2,VDSL2)等。
PLC节点可将载有信息的高频信号加载与电流,并将加载有高频信号的电流作为PLC信号用电线传输,接收PLC信号的设备再将该高频信号从电流中分离出来,实现了信息传递。
本申请下述各实施例所涉及的DSL信号可以为基于上述任一技术的DSL信号,如传统的DSL技术的DSL信号或者超高速DSL技术的DSL信号等;本申请所涉及的PLC信号可以为基于室内电力线通信的PLC信号。PLC信号,对于无论哪种DSL技术的DSL信号,其均存在频谱重叠,使得PLC节点对DSL节点的干扰较强。该频谱重叠可以称为DSL节点和PLC节点之间的频谱重叠,即DSL节点传输的DSL信号与PLC节点传输的PLC信号之间的频谱重叠。
本申请下述各实施例提供的通信方法旨在减少PLC节点对DSL节点的干扰,提高通信质量。
为减少PLC节点对DSL节点干扰,本申请实施例提供一种通信系统、以及应用于该通信系统的通信方法、装置及存储介质等。该通信系统的产品形态可以为包括有数字用户线收发器和电力线通信收发器的网关设备,也可以为包括有数字用户线收发器和电力线通信收发器的设备系统。下面先对本申请实施例以包括有数字用户线收发器和电力线通信收发器的网关设备为例进行说明。图2为本申请实施例提供的一种网关设备的结构示意图。 如图2所示的网关设备20还可称为家庭网关或室内网关,其可包括:数字用户线收发器21和电力线通信收发器22。数字用户线收发器21可以为基于上述任一DSL技术的DSL收发器,如传统DSL技术的DSL收发器或者超高速DSL技术的DSL收发器,数字用户线收发器21还可称为DSL收发器或DSL模块,电力线通信收发器22还可称为PLC收发器或PLC模块,数字用户线收发器21和电力线通信收发器22可分别为网关设备20内部的两个独立的模块。数字用户线收发器21与电力线通信收发器22连接,用以实现数字用户线收发器21和电力线通信收发器22之间的信息传输。
网关设备20还具有有线接口(wireline interface)23,可与网络设备如局端设备连接,用以实现该网关设备20与网络设备之间的网络信号传输。其中,该局端设备例如可以为分布点(Distribution Point,DP)或数字用户线接入复用器(DSL Access Multiplexer,DSLAM)等。
该网关设备20中,数字用户线收发器21和电力线通信收发器22可分别连接网络设备,即数字用户线收发器21连接网络设备以实现数字用户线收发器21的上行接入,电力线通信收发器22也连接网络设备以实现电力线通信收发器22的上行接入。或者,该网关设备20中,可由数字用户线收发器21与网络设备连接,实现数字用户线收发器21的上行接入,并以此作为该网络设备的上行接入,该数字用户线收发器21间接与电力线通信收发器22连接,从而使得电力线通信收发器22的上行接入,即使得电力线通信收发器22上行接入该网络设备。
可选的,网关设备20还具有以太网路由器24,该以太网路由器24可分别与数字用户线收发器21和电力线通信收发器22连接,即该数字用户线收发器21可通过以太网路由器与电力线通信收发器22连接。
该网关设备20中数字用户线收发器21下行接入DSL节点,电力线通信收发器22下行接入一个或多个PLC节点。例如,网关设备20还具有网线接口25,该网线接口25可以为五类线(Category 5,CAT5)接口,该网线接口25还可称为家庭或室内网关接口,该网线接口25可用以与DSL节点连接,用以实现该数字用户线收发器21的下行接入,从而实现DSL节点的网络服务。网关设备20还具有电力线接口(Powerline interface)26,该电力线接口26可用以连接PLC节点,用以使得电力线收发器22下行可接入一个或多个PCL节点,继而实现PLC节点的网络服务。
具体地,该以太网路由器24可用以将数字用户线收发器21通过有线接口23所接收到的DSL信号路由至电力线通信收发器22,使得电力线通信收发器22将接收到的DSL信号转换为PLC信号,并通过电力线接口26将该PLC信号传输至电力线接口26连接的PLC节点;该以太网路由器24还可用以将通过电力线接口26接收到的PLC信号转换为DSL信号,并通过以太网路由器24传输至数字用户线收发器21,使得数字用户线收发器21通过有线接口23将该DSL信号传输至网络设备,从而实现PLC节点的网络服务。
该以太网路由器24还可用以将数字用户线收发器21通过有线接口23所接收到的DSL信号路由至网线接口25连接的DSL节点;还可将通过网线接口25接收到的DSL节点发送的DSL信号传输至数字用户线收发器21,使得数字用户线收发器21通过有线接口23将该DSL信号传输至网络设备,从而实现DSL节点的网络服务。
由于PLC信号实际是加载在电流信号上的网络信号,因此,图2所示的网关设备20 中电力线接口26所获取的信号实际为电流信号。该网关设备20中还包括:供电设备27,该供电设备27与电力线接口26连接,还可与该网关设备20内部的各用电器件进行连接。该供电设备27可以通过电力线接口26接收电流信号,用以对网关设备20内部的各用电器件提供电能。也就是说,该网关设备20内的各用电器件例如可包括:数字用户线收发器21、电力线通信收发器22和以太网路由器24等,也就是说,供电设备27还可分别与数字用户线收发器21、电力线通信收发器22和以太网路由器24进行连接。需要指出的是,在附图2中,供电设备27与网关设备20内部的各用电器件之间的电连接暂未示出。
如下结合多个示例,对本申请实施例所提供的应用于包括该数字用户线收发器21和电力线通信收发器22的通信系统的通信方法进行说明。图3为本申请实施例提供的一种通信方法的流程图。该通信方法可由包括该数字用户线收发器21和电力线通信收发器22的通信系统实现,该通信系统例如可以为上述图2所示的网关设备20类似或相同的产品形态,也可以为其它的产品形态。如图3所示,该通信方法可包括:
S301、PLC收发器向DSL收发器发送第一调度信息(Scheduling information),该第一调度信息包括该一个或多个PLC节点中第一PLC节点的调度时间段的信息。
该PLC收发器可为上述图2中所示的电力线通信收发器22。DSL收发器可以为上述图2中所示的数字用户线收发器。该一个或多个PLC节点可以为接入电力线通信收发器22的PLC节点,接入电力线通信收发器22的PLC节点所构成的网络可称为PLC网络,则该一个或多个PLC节点还可称为PLC网络中的PLC节点。其中,接入电力线通信收发器22可以是通过电力线接口26,接入电力线通信收发器22。该第一PLC节点可以为一个或多个PLC节点中的部分或全部PLC节点,可以为一个,也可以为多个。
PLC收发器可获取该第一PLC节点的调度信息,并向DSL收发器发送该第一调度信息;PLC收发器还可获取接入该PLC收发器的多个PLC节点中所有PLC节点的调度信息,从中选择第一PLC节点的调度信息,并向DSL收发器发送该第一调度信息。
PLC节点例如可通过电力线接口26,向电力线通信收发器22发送接入请求,电力线通信收发器22根据接收到的接入请求,确定接入的PLC节点,并对接入的PLC节点进行调度。电力线通信收发器22可通过为接入的PLC节点分配调度资源,用以实现对PLC节点的调度。该调度资源可包括:调度时间段和/或调度频率等资源。其中,该PLC收发器向DSL收发器发送的该第一PLC节点的调度信息中,至少可包括该第一PLC节点的调度时间段的信息。
可选的,该调度时间段可以为竞争基础的时隙(contention-based Time slot,CBTS),或者,自由竞争的时隙(Contention-free time slot,CFTS)。
该PLC收发器可通过与DSL收发器之间的连接通路,向DSL收发器发送该第一PLC节点的调度信息。
S302、在该第一PLC节点的调度时间段内,该DSL收发器获取该第一PLC节点对应的抵消系数,并根据该第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消。
该DSL信号为该DSL收发器与DSL节点之间的传输信号,该第一噪声信号为该PLC收发器与该第一PLC节点通信所产生的噪声信号。
PLC收发器可在该第一PLC节点的调度时间段内,调度该第一PLC节点,以实现PLC 收发器与第一PLC节点之间的通信。而在PLC收发器与第一PLC节点通信,会对DSL收发器与DSL节点的通信产生干扰,即在DSL信号上产生该第一噪声信号。也就是说,该第一噪声信号实际是在第一PLC的调度时间段内产生的,因此,该DSL收发器可在该第一PLC节点的调度时间段内获取该第一PLC节点对应的抵消系数,并在该第一PLC节点的调度时间段内,根据该第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消。
该第一PLC节点对应的抵消系数可以为该第一PLC节点对应的滤波系数,该DSL收发器可根据该第一PLC节点对应的滤波系数,对该DSL信号进行处理如滤波,以滤除或减小该DSL信号上的第一噪声信号,从而实现对该DSL信号上的第一噪声信号的抵消。
本申请实施例提供的通信方法,可通过PLC收发器向该网关设备中的DSL收发器发送第一调度信息,该第一调度信息包括该PLC收发器所接入的一个或多个PLC节点中该第一PLC节点的调度时间段的信息,在该第一PLC节点的调度时间段内,由该DSL收发器获取该第一PLC节点对应的抵消系数,并根据该第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消,该DSL信号为该DSL收发器与DSL节点之间的传输信号,该第一噪声信号为该PLC收发器与该第一PLC节点通信所产生的噪声信号。该方法中,DSL收发器可在第一PLC节点的调度时间段内,获取该第一PLC节点对应的抵消系数,并根据该第一PLC节点对应的抵消系数,对DSL信号上的由于第一PLC节点产生的第一噪声信号进行抵消,可有效降低PLC节点对DSL节点的干扰,提高通信质量。
如上所示的第一PLC节点可以为首次接入该PLC收发器的节点,也可以为非首次接入该PLC收发器的节点。本申请实施例还可提供一种获取首次接入PLC收发器的节点对应的抵消系数的方法示例。图4为本申请实施例提供的一种通信方法中获取第一PLC节点对应的抵消系数的方法流程图。如图4所示,如上所示的S302中该DSL收发器获取该第一PLC节点对应的抵消系数可包括:
S401、DSL收发器根据该DSL收发器中DSL的差模信号和从该DSL上提取的共模信号,确定该第一PLC节点对应的抵消系数。
该DSL的差模信号可以为该DSL收发器从有线接口或以太网路由器所接收的DSL信号,其为受到该第一噪声信号的干扰后的DSL信号。该DSL收发器可根据预设的共模提取(Common Mode extraction)算法,从该差模信号中提取共模信号,并根据该差模信号和该共模信号,确定该第一PLC节点对应的抵消系数,实现了抵消系数的训练。
可选的,本申请实施例还可提供一种通信系统。在该实施例中,继续以包括PLC收发器和DSL收发器的网络设备的产品形态为例进行说明。图5为本申请实施例提供的另一种网关设备的结构示意图。如图5所示,可选的,上述网关设备20中DSL收发器21可包括:共模提取模块211、抵消模块212和有线收发模块213。其中,共模提取模块211可以通过有线接口23与局端设备连接,还可通过有线收发模块213与以太网路由器24连接。该共模提取模块211还通过抵消模块212与有线收发模块213连接。该抵消模块212还与PLC收发器22连接。该共模提取模块211还可称为混合或收发开关(Hybrid or RX/TX switch),可从局端设备或以太网路由器24接收的DSL信号,并从该DSL信号上提取该共模信号。该共模提取模块211可在确定接收到该DSL信号即该差模信号,并从中提取到该共模信号 的情况下,向该抵消模块发送该差模信号和该共模信号,由该抵消模块212根据该差模信号和该共模信号,进行抵消系数的训练,以确定该第一PLC节点对应的抵消系数。
该抵消模块212在确定该第一PLC对应的抵消系数的情况下,可将该第一PLC节点对应的抵消系数发送至有线收发模块213,由该有线收发模块213根据该第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消。
可选的,该方法还可包括:
S402、该DSL收发器将该第一PLC节点对应的抵消系数存储至预设的抵消列表中。
该DSL收发器可将该第一PLC节点对应的抵消系数存储至预设的抵消列表中,该预设的抵消列表,用以存储PLC节点以及抵消系数的对应关系。
本申请实施例提供一种通信方法,可在第一PLC节点为首次接入该PLC收发器的节点的情况下,由该DSL收发器根据该DSL收发器中DSL的差模信号和从该DSL上提取的共模信号,确定该第一PLC节点对应的抵消系数,可使得抵消系数更准确,从而有效降低PLC节点对DSL节点的干扰,提高通信质量。并且,该方法,还可使得新接入的PLC节点既能快速加入网络,实现网络服务,也可快速降低该PLC节点对DSL节点的干扰。
该方法中,还可将该第一PLC节点对应的抵消系数进行存储,以便于后续该第一PLC节点接入该PLC收发器进行通信时,直接获取该抵消系数即可,而无需通过抵消系数的训练进行确定,从而快速地降低PLC节点对DSL节点的干扰。
可选的,若该第一PLC节点为非首次接入该PLC收发器的节点,则该DSL收发器从预设的抵消列表中,获取第一PLC节点对应的抵消系数,该抵消列表中存储有至少一个PLC节点对应的抵消系数。
该实施例的方案中,DSL收发器可从预设的抵消列表中,获取第一PLC节点对应的抵消系数,用以对DSL信号上该第一噪声信号进行干扰,而无需通过抵消系数的训练进行确定,从而快速地降低PLC节点对DSL节点的干扰。
可选的,如上所示的第一PLC节点可包括:一个或多个PLC节点,若包括多个节点,则上述S302中该DSL收发器获取该第一PLC节点对应的抵消系数可包括:
在该多个节点中每个节点的调度时间段内,该DSL收发器获取该每个节点对应的抵消系数,并根据该每个节点对应的抵消系数,对该DSL信号上的第二噪声信号进行抵消,所述第二噪声信号为该PLC收发器与该每个节点通信所产生的噪声信号。
对于接入该PLC收发器的多个节点,该DSL收发器可分别在每个节点的调度时间段内,获取该每个节点对应的抵消系数,继而根据该每个节点对应的抵消系数,对该DSL信号上的第二噪声信号进行抵消。而该多个节点可能包括:首次接入该PLC收发器的节点,和/或,非首次接入该PLC收发器的节点,该每个节点可能为首次接入该PLC收发器的节点,也可能为非首次接入PLC收发器的节点。若每个节点为首次接入该PLC收发器的节点,则该DSL收发器可执行上述图4类似的方式获取该每个节点对应的抵消系数;若每个节点为非首次接入该PLC收发器的节点,则该DSL收发器可执行上述该第一PLC节点为非首次接入该PLC收发器的节点情况下,类似的方式获取该每个节点对应的抵消系数。
由于第二噪声信号实际是在每个节点的调度时间段内产生的,因而,该DSL收发器可在该每个节点的调度时间段内,获取该每个节点对应的抵消系数,继而根据该每个节点对应的抵消系数,对该DSL信号上的第二噪声信号进行抵消。
可选的,无论采用上述哪种方式获取该第一PLC节点对应的抵消系数,则S302中该DSL收发器获取该第一PLC节点对应的抵消系数之前,该方法还可包括:
在该调度时间段的开始时刻,该DSL收发器启动在线重配置(on-line reconfiguration,简称OLR),并调高信噪比裕度(Signal to noise ratio Margin,SNR Margin)。
具体实现中,可DSL收发器可根据当前环境的噪声即当前DSL信号中的噪声,降低比特加载,提升SNR-Margin,以保持线路的稳定性。
该实施例提供的通信方法,可使得DSL收发器在该多个节点中每个节点的调度时间段内,获取该每个节点对应的抵消系数,并根据该每个节点对应的抵消系数,对该DSL信号上的第二噪声信号进行抵消,有效降低该多个节点中每个节点对DSL节点的干扰,提高通信质量。
可选的,在上述任一通信方法的基础上,本申请实施例还可提供一种通信方法,该通信方法可在获取该第一PLC节点对应的抵消系数之前,对第一PLC节点进行鉴别,以识别其是否为对DSL节点有害的节点。图6为本申请实施例提供的一种通信方法中有害PLC节点的识别方法的流程图。如图6所示,该方法在上述S302中该DSL收发器获取该第一PLC节点对应的抵消系数之前,还可包括:
S601、该DSL收发器确定该DSL信号的噪声参数是否等于或超过预设的噪声阈值。
S602、若是,则该DSL收发器获取该第一PLC节点对应的抵消系数。
其中,该噪声阈值可以预设的噪声参数的阈值,其可以根据历史的噪声参数确定,例如该第一PLC节点之前的PLC节点通信时的噪声参数等。
该方法中,DSL收发器可对该DSL信号进行处理,以确定该DSL信号的噪声参数。该噪声参数例如可以为该DSL信号的信噪比,该DSL信号中的噪声功率等任一参数。
也就是说,该DSL收发器可通过确定该DSL信号的噪声参数是否等于或超过预设的噪声阈值,确定该第一PLC节点是否为有害节点,若该DSL信号的噪声参数等于或超过该预设的噪声阈值,则可确定该第一PLC节点为有害节点,即该第一PLC节点对DSL节点的噪声干扰较大;反之,若该DSL信号的噪声参数小于该预设的噪声阈值,则可确定该第一PLC节点为非有害节点即该第一PLC节点对该DSL节点的噪声干扰较小。
若该第一PLC节点为有害节点,则DSL收发器可获取该第一PLC节点对应的抵消系数,继而根据该第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消;反之,若该第一PLC节点为非有害节点,则该DSL收发器可无需获取该第一PLC节点对应的抵消系数。
若该第一PLC节点为有害节点,且为首次接入该PLC收发器的节点,则可确定该第一PLC节点为新的有害节点,则DSL收发器可执行上述图4类似的方式获取第一PLC节点对应的抵消系数;若该第一PLC节点为有害节点,但为非首次接入该PLC收发器的节点,则可确定该第一PLC节点为旧的有害节点,该DSL收发器可执行上述该第一PLC节点为非首次接入该PLC收发器的节点情况下,类似的方式获取该每个节点对应的抵消系数。
该实施例所提供的通信方法中,该DSL收发器可在确定该DSL信号的噪声参数等于或超过该预设的噪声阈值的情况下,获取该第一PLC节点对应的抵消系数,继而根据该第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消,可在减少PLC节 点对DSL节点干扰的情况下,减少DSL收发器的操作,降低功耗。
可选的,该通信方法还可包括:
S603、DSL收发器向PLC收发器发送该第一PLC节点的信息。
若该DSL信号的噪声参数等于或超过预设的噪声阈值,则可DSL收发器可确定该第一PLC节点为有害节点。若该DSL收发器确定PLC节点为有害节点,该DSL收发器还可将该有害节点的信息发送至PLC收发器,以告知该PLC收发器。则在该实施例中,该DSL收发器可向PLC收发器发送该第一PLC节点的信息。
DSL收发器向PLC收发器发送有害节点的信息,如该第一PLC节点的信息,如此,可使得PLC收发器准确获知接入的节点中的有害节点,便于该PLC收发器根据有害节点的信息减少其对DSL节点的干扰影响。
可选的,该通信方法还可包括:
S604、PLC收发器向DSL收发器发送至少一个组的调度信息,每个组的调度信息包括:该每个组内至少一个PLC节点的调度时间段的信息。
该每个组内至少一个PLC节点中,仅具有一个第二PLC节点,该第二PLC节点为通信过程中该DSL信号的噪声参数等于或超过该噪声阈值的PLC节点;
该PLC收发器例如可根据至少一个第二PLC节点的信息,对接入该PLC收发器的多个PLC节点进行分组,得到该至少一个组,使得每个组所包括的至少一个PLC节点仅具有一个该第二PLC节点。第二PLC节点为对DSL节点有害的节点,即在每个该第二PLC节点的通信过程中该DSL信号的噪声参数等于或超过该噪声阈值。
至少一个第二PLC节点为接入该PLC收发器的多个PLC节点中的有害节点,该至少一个第二PLC节点可包括上述第一PLC节点。该实施例中,对多个PLC节点进行分组,可使得每个组内仅具有一个有害节点。
该PLC收发器可在对多个PLC节点进行分组后,获取该至少一个组的调度信息。该PLC收发器可对该每个组的至少一个PLC节点分配调度资源,用以实现对该每个组内的PLC节点进行调度。该调度资源可包括:调度时间段和/或调度频率等资源。其中,该PLC收发器向DSL收发器发送的每个组的调度信息中,至少可包括该每个组内该至少一个PLC节点的调度时间段的信息。
S605、该DSL收发器在该每个组内该第二PLC节点的调度时间段内,获取该第二PLC节点对应的抵消系数。
每个组内包括一个第二PLC节点,还包括其它PLC节点。可选的,该每个组内的第二PLC节点可以为该每个组内的第一个被调度的PLC节点。若该第二PLC节点为该每个组的第一个被调度的PLC节点,在该第二PLC节点的调度时间段内获取该第二PLC节点对应的抵消系数,可使得在每个组的调度时间段内,尽可能早地获取用以进行干扰消除或降低的抵消系数,即该第二PLC节点对应的抵消系数,从而尽可能迅速的减少第二PLC节点对DSL节点的干扰。
S606、该DSL收发器在该每个组内至少一个PLC节点的调度时间段内,根据该第二PLC节点对应的抵消系数,对该DSL信号的第三噪声信号进行抵消;该第三噪声信号为该PLC收发器与该至少一个PLC节点通信所产生的噪声信号。
该DSL收发器可在该每个组的调度时间段内,根据该第二PLC节点对应的抵消系数, 对该DSL信号进行处理,以对该DSL信号中的第三噪声信号进行抵消。
由于每个组仅具有一个第二PLC节点,而在每个组的调度时间段内,均采用该第二PLC节点对应的抵消系数进行干扰抵消,即在该每个组内无需进行抵消系数的切换,而只有在调度组切换的情况下,才需进行抵消系数的切换,避免了抵消系数的频繁切换,有效降低或减少PLC节点对DSL节点的干扰,提高通信质量。其中,调度组的切换可以为:从一个组内的PLC节点进行调度,切换至对另一个组内的PLC节点进行调度。
在上述任一所示的通信方法的基础上,本申请实施例还可提供下述多个具体的实现示例,以对上述通信方法进行说明。图7为本申请实施例提供的另一种通信方法的流程图。该图7可针对新接入的PLC节点进行示例说明,以使得新接入的PLC节点尽可能快速的加入网络,并且快速抵消其对DSL节点的干扰,如图7所示,该通信方法可包括:
S701、PLC收发器获取PLC网络中的PLC节点的调度信息,并向DSL收发器发送该调度信息。
该PLC网络中的PLC节点可包括:该PLC网络中的所有节点,该PLC网络可以为该PLC收发器以及接入该PLC收发器的PLC节点所构成的网络。每个PLC节点的调度信息可包括:每个PLC节点的调度时间段的信息等。
在该PLC收发器内可包括:电力线主要管理(Powerline Domain Master,PDM)模块,可由该PDM模块执行该S701,即获取调度信息,并向DSL收发器发送该调度信息。
S702、在该PLC网络中首次接入的PLC节点的调度时间段的开始时刻,DSL收发器启动OLR,并提高信噪比裕度。
在首次接入的PLC节点的调度时间段的开始时刻,该首次接入的PLC节点即新接入的PLC节点与PLC收发器开始传输PLC信号。
S703、DSL收发器在该首次接入的PLC节点的调度时间段内,确定DSL信号的噪声参数是否等于或超过预设的噪声阈值。
PLC收发器例如可在该首次接入的PLC节点的调度时间段内,向该DSL收发器中的抵消模块发送使能信号,以使能该抵消模块,还在该首次接入的PLC节点的调度时间如CBTS或CFTS期间内,向该DSL收发器中的抵消模块发送触发信号,以触发该DSL收发器中的抵消模块衡量该首次接入的PLC节点的通信所导致的噪声能力,如确定DSL信号的噪声参数是否等于或超过预设的噪声阈值,继而根据比较结果确定该首次接入的PLC节点是否为有害PLC节点。其中,抵消模块的使能以及触发信号的发送,例如可由PLC收发器的PDM模块实现。
S704、若该噪声参数等于或超过该噪声阈值,则该DSL收发器可获取该首次接入的PLC节点对应的抵消系数,并将该首次接入的PLC节点对应的抵消系数存储至预设的抵消列表中。
该DSL收发器例如可通过上述图4所示的方法,进行抵消系数的训练,以获取该首次接入的PLC节点对应的抵消系数。
S705、在该首次接入的PLC节点的调度时间段内,该DSL收发器根据该首次接入的PLC节点对应的抵消系数,对该DSL信号进行处理,以对DSL信号中的噪声信号进行抵消处理。
该方法中,DSL收发器可重复执行上述S704-S705,直至该DSL信号的噪声参数小于该预设的噪声阈值,即使得DSL信号中的噪声信号尽可能地减小。如此,该方法,可使得首次接入的PLC节点尽可能快地加入网络,实现网络服务,又能迅速地减小或抵消该PLC节点对DSL节点的干扰,提高通信质量。
图8为本申请实施例提供的又一种通信方法的流程图。该图8可针对接入的多个PLC节点进行示例说明,以针对多个PLC节点中各PLC节点,在对应的时间段内切换对应的抵消系数,以在对应的时间段内抵消干扰,如图8所示,该通信方法可包括:
S801、PLC收发器获取PLC网络中的PLC节点的调度信息,并向DSL收发器发送该调度信息。
该PLC网络中的PLC节点可包括:该PLC网络中的所有节点,该PLC网络可以为该PLC收发器以及接入该PLC收发器的PLC节点所构成的网络。每个PLC节点的调度信息可包括:每个PLC节点的调度时间段的信息等。
在该PLC收发器内可包括:电力线主要管理(Powerline Domain Master,PDM)模块,可由该PDM执行该S801,即获取调度信息,并向DSL收发器发送该调度信息.
S802、DSL收发器在该PLC网络中每个PLC节点的调度时间段内,获取该每个PLC节点对应的抵消系数。
PLC收发器例如可在每个PLC节点的调度时间段如CBTS或CFTS期间内,向该DSL收发器中的抵消模块发送触发信号以及该每个PLC节点的标识,以触发该DSL收发器中的抵消模块根据该触发信号以及该每个PLC节点的标识进行抵消系数的训练,以获取该每个PLC节点对应的抵消系数。
S803、在该每个PLC节点的调度时间段内,DSL收发器根据该每个PLC节点对应的抵消系数,对该DSL信号进行处理,以对DSL信号中的噪声信号进行抵消处理。
例如,在一个PLC节点的调度时间段内,DSL收发器根据该一个PLC节点对应的抵消系数,对DSL信号进行处理,以对该DSL信号中该一个PLC节点通信所产生的噪声信号进行抵消处理;在另一个PLC节点的调度时间段内,DSL收发器根据该另一个PLC节点对应的抵消系数,对DSL信号进行处理,以对该DSL信号中该另一个PLC节点通信所产生的噪声信号进行抵消处理。也就是说,当PLC收发器从对一个PLC节点进行调度切换至对另一个PLC节点进行调度时,DSL收发器可进行抵消系数的切换,即从该一个PLC节点对应的抵消系数,切换至该另一个PLC节点对应的抵消系数。
该方法,可在每个PLC节点的调度时间段内,根据该每个PLC节点对应的抵消系数,对该DSL信号进行处理,以对DSL信号中的噪声信号进行抵消处理,使得DSL收发器可在对应的调度时间段内,采用对应的抵消系数进行处理,有效减少每个PLC节点对DSL节点的干扰。
图9为本申请实施例提供的再一种通信方法的流程图。该图9可针对接入的多个PLC节点进行示例说明,以针对多个PLC节点进行分组,使得每个组内仅具有一个有害节点,继而在每个组的调度时间段内无需进行抵消系数的切换,采用该每个组包括的有害节点对应的抵消系数进行处理即可减少或抵消干扰。如图9所示,该通信方法可包括:
S901、PLC收发器对接入的多个PLC节点进行分组,得到至少一个组,每个组包括至少一个PLC节点,其中,仅具有一个对DSL节点有害的节点。
该有害节点为在该多个PLC节点中,通信过程中DSL信号的噪声参数等于或超过噪声阈值的PLC节点。
S902、该PLC收发器向该DSL收发器发送该每个组的调度信息,该每个组的调度信息包括:该每个组内该至少一个PLC节点的调度时间段的信息。
在该实施例中,PLC收发器获知该多个PLC节点的调度信息,还获知该多个PLC节点中的有害节点信息。
S903、DSL收发器在每个组内有害节点的调度时间段内,获取该有害节点对应的抵消系数。
该PLC收发器还向DSL收发器的抵消模块发送触发信号以及该每个组内的PLC节点的标识,使得该DSL收发器的抵消模块可根据该触发信号以及该每个组内的PLC节点的标识,确定该每个组内的各PLC节点是否为有害节点,若为有害节点,则获取该有害节点对应的抵消系数。其中,该各PLC节点是否有害,可以为:该各PLC节点通信过程中,该DSL信号的噪声参数是否等于或超过预设的噪声阈值,若等于或超过该噪声阈值,则可确定该各PLC节点为有害节点,反之,若小于该噪声阈值,则可确定该各PLC节点为非有害节点。
S904、DSL收发器在每个组的调度时间段内,根据该有害节点对应的抵消系数,对DSL信号进行处理,以对DSL信号中的噪声信号进行抵消处理。
该实施例提供的通信方法,可在每个组的调度时间段内,均采用该有害节点对应的抵消系数进行干扰抵消,即在该每个组内无需进行抵消系数的切换,而只有在调度组切换的情况下,才需进行抵消系数的切换,避免了抵消系数的频繁切换,有效降低或减少PLC节点对DSL节点的干扰,提高通信质量。其中,调度组的切换可以为:从一个组内的PLC节点进行调度,切换至对另一个组内的PLC节点进行调度。
本申请实施例还可提供一种通信装置。该通信装置可适用于包括PLC收发器和DSL收发器的系统,该PLC收发器和该DSL收发器连接,该PLC收发器上行接入网络设备,该PLC收发器下行接入一个或多个PLC节点,该DSL收发器上行接入该网络设备,该DSL收发器下行接入DSL节点。图10为本申请实施例提供的通信装置的结构示意图。如图10所示,通信装置可包括:用于该PLC收发器的第一模块101,和用于该DSL收发器的第二模块102。
第一模块101,用于控制该PLC收发器向该DSL收发器发送第一调度信息,该第一调度信息包括该一个或多个PLC节点中第一PLC节点的调度时间段的信息;
第二模块102,用于在该第一PLC节点的调度时间段内,控制该DSL收发器获取该第一PLC节点对应的抵消系数,并根据该第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消,该DSL信号为该DSL收发器与DSL节点之间的传输信号,该第一噪声信号为该PLC收发器与该第一PLC节点通信所产生的噪声信号。
可选的,该第一PLC节点为:首次接入该PLC收发器的节点;
第二模块102,具体用于控制该DSL收发器根据该DSL收发器中DSL的差模信号和 从该DSL上提取的共模信号,确定该第一PLC节点对应的抵消系数。
可选的,第二模块102,还用于控制该DSL收发器将该第一PLC节点对应的抵消系数存储至预设的抵消列表中。
可选的,第二模块102,具体用于控制该DSL收发器从预设的抵消列表中获取该第一PLC节点对应的抵消系数,该抵消列表中存储有至少一个PLC节点对应的抵消系数。
可选的,该第一PLC节点包括:接入该PLC收发器的多个节点;
第二模块102,具体用于在该多个节点中每个节点的调度时间段内,控制该DSL收发器获取该每个节点对应的抵消系数,并根据该每个节点对应的抵消系数,对该DSL信号上的第二噪声信号进行抵消,该第二噪声信号为该PLC收发器与该每个节点通信所产生的噪声信号。
可选的,第二模块102,还用于在获取该第一PLC节点对应的抵消系数之前,控制该DSL收发器确定该第一PLC节点通信过程中,该DSL信号的噪声参数是否等于或超过预设的噪声阈值;若是,则获取该第一PLC节点对应的抵消系数。
可选的,第二模块102,还用于控制该DSL收发器向该PLC收发器发送该第一PLC节点的信息。
可选的,第一模块101,还用于控制该PLC收发器向该DSL收发器发送至少一个组的调度信息,每个组的调度信息包括:该每个组内至少一个PLC节点的调度时间段的信息;该每个组内至少一个PLC节点中,仅具有一个第二PLC节点,该第二PLC节点为通信过程中该DSL信号的噪声参数等于或超过该噪声阈值的PLC节点;
第二模块102,还用于控制该DSL收发器在该每个组内该第二PLC节点的调度时间段内,获取该第二PLC节点对应的抵消系数;在该每个组内至少一个PLC节点的调度时间段内,根据该第二PLC节点对应的抵消系数,对该DSL信号的第三噪声信号进行抵消;该第三噪声信号为该PLC收发器与该至少一个PLC节点通信所产生的噪声信号。
可选的,第二模块102,还用于在该调度时间段的开始时刻,控制该DSL收发器启动在线重配置OLR,并调高信噪比裕度。
本申请实施例提供的通信装置,可执行上述图3-图9中任一所示的通信方法,其具体实现过程及有效效果等,参见上述,在此不再赘述。
本申请实施例还可提供一种通信系统。作为上述图10所示的通信装置的一种可能的产品形态,其可以为包括PLC收发器和DSL收发器的通信系统,该通信系统的具体形态可以为设备构成的系统形态,即PLC收发器和DSL收发器分别作为一个设备,从而构成一个系统。该通信系统也可以为设备形态即PLC收发器和DSL收发器分别作为设备内部的构成组件。无论何种形态,该通信系统可用以执行上述图3-图9中任一所示的通信方法。图11为本申请实施例提供的一种通信系统的结构示意图。如图11所示,该通信系统可包括:PLC收发器111和DSL收发器112的系统。PLC收发器111包括:第一网络接口1111、PLC接口1112、第一处理器1113和第一传输接口1114。第一网络接口1111、PLC接口1112和第一传输接口1114分别与第一处理器1113连接,第一网络接口1111与上行接入的网络设备连接,PLC接口1112与下行接入的一个或多个PLC节点连接;DSL收发器112包括:第二网络接口1121、DSL接口1122、第二处理器1123和第二传输接口1124,第二 网络接口1121、DSL接口1122和第二传输接口1124分别与第二处理器1123连接;第一传输接口1114还与第二传输接口1124连接。
第一传输接口1114,用于向第二传输接口1124发送第一调度信息,该第一调度信息包括该一个或多个PLC节点中第一PLC节点的调度时间段的信息。
第二传输接口1124,用于接收该第一调度信息。
第二处理器1123,用于在该第一PLC节点的调度时间段内,获取该第一PLC节点对应的抵消系数,并根据该第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消,该DSL信号为该DSL收发器与DSL节点之间的传输信号,该第一噪声信号为该PLC收发器与该第一PLC节点通信所产生的噪声信号。
可选的,若该第一PLC节点为首次接入PLC收发器的节点,第二处理器1123,具体用于根据该DSL收发器中DSL的差模信号和从该DSL上提取的共模信号,确定该第一PLC节点对应的抵消系数。
可选的,第二处理器1123,还用于将该第一PLC节点对应的抵消系数存储至预设的抵消列表中。
可选的,该第一PLC节点为非首次接入该PLC收发器的节点,则第二处理器1123,具体用于从预设的抵消列表中获取该第一PLC节点对应的抵消系数,该抵消列表中存储有至少一个PLC节点对应的抵消系数。
可选的,若该第一PLC节点包括:接入该PLC收发器的多个节点,则第二处理器1123,具体用于在该多个节点中每个节点的调度时间段内,获取该每个节点对应的抵消系数,并根据该每个节点对应的抵消系数,对该DSL信号上的第二噪声信号进行抵消,该第二噪声信号为该PLC收发器与该每个节点通信所产生的噪声信号。
可选的,第二处理器1123,还用于在获取该第一PLC节点对应的抵消系数之前,确定该第一PLC节点通信过程中,该DSL信号的噪声参数是否等于或超过预设的噪声阈值;若是,则获取该第一PLC节点对应的抵消系数。
可选的,第二传输接口1124,还用于向第一传输接口1114发送该第一PLC节点的信息;
第一传输接口1114,还用于接收该第一PLC节点的信息。
可选的,第一传输接口1114,还用于向第二传输接口1124发送至少一个组的调度信息,每个组的调度信息包括:该每个组内至少一个PLC节点的调度时间段的信息;该每个组内至少一个PLC节点中,仅具有一个第二PLC节点,该第二PLC节点为通信过程中该DSL信号的噪声参数等于或超过该噪声阈值的PLC节点;
第二处理器1123,还用于在该每个组内该第二PLC节点的调度时间段内,获取该第二PLC节点对应的抵消系数;在该每个组内至少一个PLC节点的调度时间段内,根据该第二PLC节点对应的抵消系数,对该DSL信号的第三噪声信号进行抵消;该第三噪声信号为该PLC收发器与该至少一个PLC节点通信所产生的噪声信号。
可选的,第二处理器1123,还用于在获取该第一PLC节点对应的抵消系数之前,在该调度时间段的开始时刻,启动在线重配置OLR,并调高信噪比裕度。
可选的,上述图11所示的通信系统中,PLC收发器111还可包括第一存储介质,以存储计算机程序指令,用以使得第一处理器1113调用第一存储介质所存储的计算机程序 指令,实现上述图3-图9中任一所示的PLC收发器执行的通信方法。
上述图11所示的通信系统中,DSL收发器112还可包括第二存储介质,以存储计算机程序指令,用以使得第二处理器1123调用第二存储介质所存储的计算机程序指令,实现上述图3-图9中任一所示的DSL收发器执行的通信方法。
可选的,上述图11所示的通信系统的产品形态可以为设备形态,即该通信系统可以为一种通信设备,如网关设备。
本申请实施例提供的通信系统,可执行上述图3-图9中任一所示的通信方法,其具体实现过程及有效效果等,参见上述,在此不再赘述。
作为上述图10所示的通信装置的又一种可能的产品形态,本申请实施例还可提供一种芯片系统。该芯片系统所包括的第一芯片和第二芯片可分别应用于PLC收发器和DSL收发器。本申请所提供的芯片系统可包括:第一芯片和第二芯片,第一芯片包括第一处理模块和第一通信接口,第二芯片包括第二处理模块和第二通信模块,该第一处理模块,用于执行上述图3-图9中任一所述的PLC收发器执行的通信方法,该第二处理模块,用于执行上述图3-图9中任一DSL收发器执行的通信方法。
可选地,该第一芯片还包括第一存储模块(如,存储器),存储模块用于存储指令,第一处理模用于执行第一存储模块存储的指令,并且对第一存储模块中存储的指令的执行使得第一处理模块执行上述图3-图9中任一所述的PLC收发器执行的通信方法;该第二芯片还包括第二存储模块(如,存储器),第二存储模块用于存储指令,第二处理模块用于执行第二存储模块存储的指令,并且对第二存储模块中存储的指令的执行使得第二处理模块执行上述图3-图9中任一所述的DSL收发器执行的通信方法。
作为上述图10所示的通信装置的另一种可能的产品形态,本申请实施例还可提供一种芯片。该芯片可以为通信系统内部的集成芯片或分布芯片,其例如可应用于网关设备。本申请实施例提供的芯片可包括:处理模块与通信接口,该处理模块能执行上述图3-图9中任一所述的通信方法。
可选地,该芯片还包括存储模块(如,存储器),存储模块用于存储指令,处理模块用于执行存储模块存储的指令,并且对存储模块中存储的指令的执行使得处理模块执行上述图3-图9中任一所述的通信方法。
为实现上述各产品形态下的通信方法,本申请实施例还可提供一种计算机存储系统。本申请实施例还提供一种计算机存储系统,可包括:第一存储介质和第二存储介质,其中,第一存储介质存储有第一计算机程序,第二存储介质存储有第二计算机程序;
该第一计算机程序用以在被电力线通信PLC收发器的处理器执行时,实现上述图3-图9中任一所述的该PLC收发器执行的通信方法;该第二计算机程序用以在被数字用户线DSL收发器的处理器执行时,实现上述图3-图9中任一所述的DSL收发器执行的通信方法。
为实现上述各产品形态下的通信方法,本申请实施例还可提供一种计算机存储介质,其上存储有计算机程序,该计算机程序用以在处理器执行时,实现上述图3-图9中任一所述的通信方法。
本申请实施例还可提供一种计算机程序,用以被处理器调用时执行上述图3-图9中任 一所述的通信方法。可选的,该计算机程序可以包括第一程序和第二程序,其中,第一程序可用以被处理器执行时,实现上述图3-图9中任一所述的PLC收发器执行的通信方法,其中,第二程序可用以被处理器执行时,实现上述图3-图9中任一所述的DSL收发器执行的通信方法。
应理解,本文中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。
应理解,在本申请实施例中,“与A相应的B”表示B与A相关联,根据A可以确定B。但还应理解,根据A确定B并不意味着仅仅根据A确定B,还可以根据A和/或其它信息确定B。
本申请中,“至少一个”是指一个或者多个,“多个”是指两个或两个以上。“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B的情况,其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达,是指的这些项中的任意组合,包括单项(个)或复数项(个)的任意组合。例如,a,b,或c中的至少一项(个),可以表示:a,b,c,a-b,a-c,b-c,或a-b-c,其中a,b,c可以是单个,也可以是多个
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、计算机软件或者二者的结合来实现,为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为了描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另外,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接,也可以是电的,机械的或其它的形式连接。
作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本申请实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
通过以上的实施方式的描述,所属领域的技术人员可以清楚地了解到本申请可以用硬件实现,或固件实现,或它们的组合方式来实现。当使用软件实现时,可以将上述功能存 储在计算机可读介质中或作为计算机可读介质上的一个或多个命令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质,其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于:计算机可读介质可以包括RAM、ROM、EEPROM、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有命令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。此外。任何连接可以适当的成为计算机可读介质。例如,如果软件是使用同轴电缆、光纤光缆、双绞线、数字用户线(DSL)或者诸如红外线、无线电和微波之类的无线技术从网站、服务器或者其他远程源传输的,那么同轴电缆、光纤光缆、双绞线、DSL或者诸如红外线、无线和微波之类的无线技术包括在所属介质的定影中。如本申请所使用的,盘(Disk)和碟(disc)包括压缩光碟(CD)、激光碟、光碟、数字通用光碟(DVD)、软盘和蓝光光碟,其中盘通常磁性的复制数据,而碟则用激光来光学的复制数据。上面的组合也应当包括在计算机可读介质的保护范围之内。
以上所述,仅为本申请实施例的具体实现方式,但本申请实施例的保护范围并不局限于此,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,可轻易想到变化或替换,都应涵盖在本申请实施例的保护范围之内。因此,本申请实施例的保护范围应以所述权利要求的保护范围为准。

Claims (30)

  1. 一种通信方法,其特征在于,所述方法应用于包括:电力线通信PLC收发器和数字用户线DSL收发器的系统,所述PLC收发器和所述DSL收发器连接,所述PLC收发器上行接入网络设备,所述PLC收发器下行接入一个或多个PLC节点,所述DSL收发器上行接入所述网络设备,所述DSL收发器下行接入DSL节点;所述方法包括:
    所述PLC收发器向所述DSL收发器发送第一调度信息,所述第一调度信息包括所述一个或多个PLC节点中第一PLC节点的调度时间段的信息;
    在所述第一PLC节点的调度时间段内,所述DSL收发器获取所述第一PLC节点对应的抵消系数,并根据所述第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消,所述DSL信号为所述DSL收发器与DSL节点之间的传输信号,所述第一噪声信号为所述PLC收发器与所述第一PLC节点通信所产生的噪声信号。
  2. 根据权利要求1所述的方法,其特征在于,所述第一PLC节点为:首次接入所述PLC收发器的节点,所述DSL收发器获取所述第一PLC节点对应的抵消系数,包括:
    所述DSL收发器根据所述DSL收发器中DSL的差模信号和从所述DSL上提取的共模信号,确定所述第一PLC节点对应的抵消系数。
  3. 根据权利要求2所述的方法,其特征在于,所述方法还包括:
    所述DSL收发器将所述第一PLC节点对应的抵消系数存储至预设的抵消列表中。
  4. 根据权利要求1所述的方法,其特征在于,所述第一PLC节点为非首次接入所述PLC收发器的节点,所述DSL收发器获取所述第一PLC节点对应的抵消系数,包括:
    所述DSL收发器从预设的抵消列表中获取所述第一PLC节点对应的抵消系数,所述抵消列表中存储有至少一个PLC节点对应的抵消系数。
  5. 根据权利要求1所述的方法,其特征在于,所述第一PLC节点包括:接入所述PLC收发器的多个节点;
    所述在所述第一PLC节点的调度时间段内,所述DSL收发器获取所述第一PLC节点对应的抵消系数,并根据所述第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消,包括:
    在所述多个节点中每个节点的调度时间段内,所述DSL收发器获取所述每个节点对应的抵消系数,并根据所述每个节点对应的抵消系数,对所述DSL信号上的第二噪声信号进行抵消,所述第二噪声信号为所述PLC收发器与所述每个节点通信所产生的噪声信号。
  6. 根据权利要求1-5中任一项所述的方法,其特征在于,所述DSL收发器获取所述第一PLC节点对应的抵消系数之前,所述方法还包括:
    所述DSL收发器确定所述第一PLC节点通信过程中,所述DSL信号的噪声参数是否等于或超过预设的噪声阈值;
    若是,则所述DSL收发器获取所述第一PLC节点对应的抵消系数。
  7. 根据权利要求6所述的方法,其特征在于,所述方法还包括:
    所述DSL收发器还向所述PLC收发器发送所述第一PLC节点的信息。
  8. 根据权利要求7所述的方法,其特征在于,所述方法还包括:
    所述PLC收发器向所述DSL收发器发送至少一个组的调度信息,每个组的调度信息 包括:所述每个组内至少一个PLC节点的调度时间段的信息;所述每个组内至少一个PLC节点中,仅具有一个第二PLC节点,所述第二PLC节点为通信过程中所述DSL信号的噪声参数等于或超过所述噪声阈值的PLC节点;
    所述DSL收发器在所述每个组内所述第二PLC节点的调度时间段内,获取所述第二PLC节点对应的抵消系数;
    所述DSL收发器在所述每个组内至少一个PLC节点的调度时间段内,根据所述第二PLC节点对应的抵消系数,对所述DSL信号的第三噪声信号进行抵消;所述第三噪声信号为所述PLC收发器与所述至少一个PLC节点通信所产生的噪声信号。
  9. 根据权利要求1-8中任一项所述的方法,其特征在于,所述DSL收发器获取所述第一PLC节点对应的抵消系数之前,所述方法还包括:
    在所述调度时间段的开始时刻,所述DSL收发器启动在线重配置OLR,并调高信噪比裕度。
  10. 根据权利要求1-9中任一项所述的方法,其特征在于,所述调度时间段为竞争基础的时隙CBTS,或者,自由竞争的时隙CFTS。
  11. 一种通信装置,其特征在于,所述通信装置适用于包括电力线通信PLC收发器和数字用户线DSL收发器的系统,所述PLC收发器和所述DSL收发器连接,所述PLC收发器上行接入网络设备,所述PLC收发器下行接入一个或多个PLC节点,所述DSL收发器上行接入所述网络设备,所述DSL收发器下行接入DSL节点;所述通信装置包括:用于所述PLC收发器的第一模块,和用于所述DSL收发器的第二模块;
    所述第一模块,用于控制所述PLC收发器向所述DSL收发器发送第一调度信息,所述第一调度信息包括所述一个或多个PLC节点中第一PLC节点的调度时间段的信息;
    所述第二模块,用于在所述第一PLC节点的调度时间段内,控制所述DSL收发器获取所述第一PLC节点对应的抵消系数,并根据所述第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消,所述DSL信号为所述DSL收发器与DSL节点之间的传输信号,所述第一噪声信号为所述PLC收发器与所述第一PLC节点通信所产生的噪声信号。
  12. 根据权利要求11所述的装置,其特征在于,所述第一PLC节点为:首次接入所述PLC收发器的节点;
    所述第二模块,具体用于控制所述DSL收发器根据所述DSL收发器中DSL的差模信号和从所述DSL上提取的共模信号,确定所述第一PLC节点对应的抵消系数。
  13. 根据权利要求12所述的装置,其特征在于,
    所述第二模块,还用于控制所述DSL收发器将所述第一PLC节点对应的抵消系数存储至预设的抵消列表中。
  14. 根据权利要求11所述的装置,其特征在于,
    所述第二模块,具体用于控制所述DSL收发器从预设的抵消列表中获取所述第一PLC节点对应的抵消系数,所述抵消列表中存储有至少一个PLC节点对应的抵消系数。
  15. 根据权利要求11所述的装置,其特征在于,所述第一PLC节点包括:接入所述PLC收发器的多个节点;
    所述第二模块,具体用于在所述多个节点中每个节点的调度时间段内,控制所述DSL 收发器获取所述每个节点对应的抵消系数,并根据所述每个节点对应的抵消系数,对所述DSL信号上的第二噪声信号进行抵消,所述第二噪声信号为所述PLC收发器与所述每个节点通信所产生的噪声信号。
  16. 根据权利要求11-15中任一项所述的装置,其特征在于,
    所述第二模块,还用于在获取所述第一PLC节点对应的抵消系数之前,控制所述DSL收发器确定所述第一PLC节点通信过程中,所述DSL信号的噪声参数是否等于或超过预设的噪声阈值;若是,则获取所述第一PLC节点对应的抵消系数。
  17. 根据权利要求16所述的装置,其特征在于,
    所述第二模块,还用于控制所述DSL收发器向所述PLC收发器发送所述第一PLC节点的信息。
  18. 根据权利要求17所述的装置,其特征在于,
    所述第一模块,还用于控制所述PLC收发器向所述DSL收发器发送至少一个组的调度信息,每个组的调度信息包括:所述每个组内至少一个PLC节点的调度时间段的信息;所述每个组内至少一个PLC节点中,仅具有一个第二PLC节点,所述第二PLC节点为通信过程中所述DSL信号的噪声参数等于或超过所述噪声阈值的PLC节点;
    所述第二模块,还用于控制所述DSL收发器在所述每个组内所述第二PLC节点的调度时间段内,获取所述第二PLC节点对应的抵消系数;在所述每个组内至少一个PLC节点的调度时间段内,根据所述第二PLC节点对应的抵消系数,对所述DSL信号的第三噪声信号进行抵消;所述第三噪声信号为所述PLC收发器与所述至少一个PLC节点通信所产生的噪声信号。
  19. 根据权利要求11-18中任一项所述的通信装置,其特征在于,
    所述第二模块,还用于在所述调度时间段的开始时刻,控制所述DSL收发器启动在线重配置OLR,并调高信噪比裕度。
  20. 一种通信系统,其特征在于,包括:电力线通信PLC收发器和数字用户线DSL收发器,其中,所述PLC收发器包括:第一网络接口、PLC接口、第一处理器和第一传输接口,所述第一网络接口、所述PLC接口和所述第一传输接口分别与所述第一处理器连接,所述第一网络接口与上行接入的网络设备连接,所述PLC接口与下行接入的一个或多个PLC节点连接;所述DSL收发器包括:第二网络接口、DSL接口、第二处理器和第二传输接口,所述第二网络接口、所述DSL接口和所述第二传输接口分别与所述第二处理器连接;所述第一传输接口还与所述第二传输接口连接;
    所述第一传输接口,用于向所述第二传输接口发送第一调度信息,所述第一调度信息包括所述一个或多个PLC节点中第一PLC节点的调度时间段的信息;
    所述第二传输接口,用于接收所述第一调度信息;
    所述第二处理器,用于在所述第一PLC节点的调度时间段内,获取所述第一PLC节点对应的抵消系数,并根据所述第一PLC节点对应的抵消系数,对DSL信号上的第一噪声信号进行抵消,所述DSL信号为所述DSL收发器与DSL节点之间的传输信号,所述第一噪声信号为所述PLC收发器与所述第一PLC节点通信所产生的噪声信号。
  21. 根据权利要求20所述的通信系统,其特征在于,所述第一PLC节点为首次接入所述PLC收发器的节点;
    所述第二处理器,具体用于根据所述DSL收发器中DSL的差模信号和从所述DSL上提取的共模信号,确定所述第一PLC节点对应的抵消系数。
  22. 根据权利要求21所述的通信系统,其特征在于,
    所述第二处理器,还用于将所述第一PLC节点对应的抵消系数存储至预设的抵消列表中。
  23. 根据权利要求20所述的通信系统,其特征在于,所述第一PLC节点为非首次接入所述PLC收发器的节点,
    所述第二处理器,具体用于从预设的抵消列表中获取所述第一PLC节点对应的抵消系数,所述抵消列表中存储有至少一个PLC节点对应的抵消系数。
  24. 根据权利要求20所述的通信系统,其特征在于,所述第一PLC节点包括:接入所述PLC收发器的多个节点;
    所述第二处理器,具体用于在所述多个节点中每个节点的调度时间段内,获取所述每个节点对应的抵消系数,并根据所述每个节点对应的抵消系数,对所述DSL信号上的第二噪声信号进行抵消,所述第二噪声信号为所述PLC收发器与所述每个节点通信所产生的噪声信号。
  25. 根据权利要求20-24中任一项所述的通信系统,其特征在于,
    所述第二处理器,还用于在获取所述第一PLC节点对应的抵消系数之前,确定所述第一PLC节点通信过程中,所述DSL信号的噪声参数是否等于或超过预设的噪声阈值;若是,则获取所述第一PLC节点对应的抵消系数。
  26. 根据权利要求25所述的通信系统,其特征在于,
    所述第二传输接口,还用于向所述第一传输接口发送所述第一PLC节点的信息;
    所述第一传输接口,还用于接收所述第一PLC节点的信息。
  27. 根据权利要求26所述的通信系统,其特征在于,
    所述第一传输接口,还用于向所述第二传输接口发送至少一个组的调度信息,每个组的调度信息包括:所述每个组内至少一个PLC节点的调度时间段的信息;所述每个组内至少一个PLC节点中,仅具有一个第二PLC节点,所述第二PLC节点为通信过程中所述DSL信号的噪声参数等于或超过所述噪声阈值的PLC节点;
    所述第二处理器,还用于在所述每个组内所述第二PLC节点的调度时间段内,获取所述第二PLC节点对应的抵消系数;在所述每个组内至少一个PLC节点的调度时间段内,根据所述第二PLC节点对应的抵消系数,对所述DSL信号的第三噪声信号进行抵消;所述第三噪声信号为所述PLC收发器与所述至少一个PLC节点通信所产生的噪声信号。
  28. 根据权利要求20-27中任一项所述的通信系统,其特征在于,
    所述第二处理器,还用于在获取所述第一PLC节点对应的抵消系数之前,在所述调度时间段的开始时刻,启动在线重配置OLR,并调高信噪比裕度。
  29. 根据权利要求20-28中任一项所述的通信系统,其特征在于,所述通信系统为网关设备。
  30. 一种计算机存储介质,其上存储有计算机程序,其特征在于,所述计算机程序用以在处理器执行时,实现上述权利要求1-10中任一通信方法。
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US20180109289A1 (en) * 2016-10-18 2018-04-19 Qualcomm Incorporated Digital subscriber line interference measurements and power line communication beamforming optimization
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