WO2015154311A1 - Dispositif côté local de ligne d'abonné numérique, dispositif terminal et système d'alimentation électrique inverse - Google Patents

Dispositif côté local de ligne d'abonné numérique, dispositif terminal et système d'alimentation électrique inverse Download PDF

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Publication number
WO2015154311A1
WO2015154311A1 PCT/CN2014/075212 CN2014075212W WO2015154311A1 WO 2015154311 A1 WO2015154311 A1 WO 2015154311A1 CN 2014075212 W CN2014075212 W CN 2014075212W WO 2015154311 A1 WO2015154311 A1 WO 2015154311A1
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WO
WIPO (PCT)
Prior art keywords
terminal
line pair
central office
module
line
Prior art date
Application number
PCT/CN2014/075212
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English (en)
Chinese (zh)
Inventor
冯儒洲
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2014/075212 priority Critical patent/WO2015154311A1/fr
Priority to CN201480000389.8A priority patent/CN104041001B/zh
Publication of WO2015154311A1 publication Critical patent/WO2015154311A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/44—Arrangements for feeding power to a repeater along the transmission line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/542—Systems for transmission via power distribution lines the information being in digital form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/548—Systems for transmission via power distribution lines the power on the line being DC

Definitions

  • the present invention relates to the field of communication technologies, and more particularly to a digital subscriber line office equipment, a terminal device, and a reverse power supply system. Background technique
  • Wired broadband access is being developed from twisted pair to home.
  • the practical problems of fiber-to-the-home difficulties will be encountered, so that the fiber can only be laid near the door of the household.
  • the last small-segment cable also needs to use the existing twisted-pair resources.
  • the prior art provides a solution for fiber/copper wire downshift from Fiber to the Distribution Point (FTTDP), which is based on traditional fiber to the roadside (Fiber to the The Curb, FTTC) scheme further moves the fiber down to the street-side refusal or cell room, and the street refusal or the cell room is placed with a remote Subscriber Line Access Multiplexer (DSLAM), which is then The twisted pair cable is connected to the user's home.
  • FTTDP Fiber to the Distribution Point
  • DSLAM remote Subscriber Line Access Multiplexer
  • FTTDP is relatively close to users, it is around 15m ⁇ 300m, so the number of sites is very large (tens of thousands or even hundreds of thousands of sites). Since there is no ready-made utility power available in the FTTDP installation location, and even if the utility power can be used to power the equipment, this is a huge burden for the operator due to the large number of FTTDP sites. Therefore, how to solve the problem of equipment power-taking has become a problem for operators, and it is also a huge obstacle for the FTTDP solution to be commercially available.
  • Reverse power supply is an option to solve the FTTDP power supply problem, for example, as shown in Figure 1: including the central office device 101, the terminal device 102, the reverse power supply terminal (Powered Device, PD) 103, and the reverse power supply terminal (Power) Supply Equipment, PSE) 104, and line pair 105.
  • the G.Fast may be used between the central office device 101 and the terminal device 102, or may be a digital subscriber line (DSL) technology such as VDSL2/ADSL2/2+.
  • the reverse power supply terminal 104 outputs the output directly on the user side.
  • the flow voltage is coupled to the twisted pair via isolation/protection module 107.
  • the reverse power supply receiving end 103 extracts the DC voltage passed by the isolation/protection module 107 after isolating the GFast at the central office as a power input.
  • G.Fast and DC voltage are coupled through an isolation module.
  • the embodiment of the invention provides a digital subscriber line central office device, a terminal device and a reverse power supply system, which are used to solve the problem that the reverse power supply distance of the digital subscriber line is small.
  • the first aspect provides a digital subscriber line office equipment, including a central office processing module, a power receiving module, at least one central office first line pair, at least one central office second line pair, and a central office interface module; a first line pair and a second line pair of the central office - corresponding;
  • the central office processing module is connected to the central office interface module by using the first line pair of the central office; the power receiving module is connected to the first line pair of the central office; The end is connected to the corresponding first line pair of the central office, and the second end of the second line pair of the central office is connected to the central end interface module;
  • the central office interface module is configured to provide an interface between the central office first line pair and the central office second line pair connection terminal side device;
  • the first line pair of the central office is configured to transmit a digital signal, receive a DC voltage signal transmitted by the terminal side, and receive a DC voltage signal transmitted by the second line pair of the central office;
  • the second line pair of the central office is configured to receive a DC voltage signal transmitted by the terminal side, and transmit the DC voltage signal to the first line pair of the central office;
  • the central office processing module is configured to process the digital signal transmitted by the first line pair of the central office; the power receiving module is configured to receive each DC voltage signal transmitted by the first line pair of the central office, according to each DC The voltage signal supplies power to the device on the central office side.
  • the method further includes a central office first isolation module.
  • the power receiving module is connected to the first line pair of the central office by the central office first isolation module;
  • the central end first isolation module is configured to isolate a digital signal between the power receiving module and the first line pair of the central office, so that each DC voltage signal transmitted by the first line pair of the central office passes The power receiving module.
  • a second possible implementation of the first aspect is provided.
  • the first end of the second-stage pair of the central office is connected to the first pair of the central office through the second isolation module of the central office;
  • the central end second isolation module is configured to isolate a digital signal between the second line pair of the central office and the first line pair of the central office, so that the received second DC signal of the central end of the central office passes The central end of the first line pair.
  • a third possible implementation manner of the first aspect is provided.
  • the central end switching module is connected to the first line pair of the central office by the central office switching module;
  • the central office switching module is configured to control the connection between the second isolation module of the central office and the first pair of the central office.
  • the central office continuity module includes at least two switches that are insulated from each other.
  • the central office first isolation module includes at least two inductors insulated from each other; or at least two low-pass filters insulated from each other.
  • the central office second isolation module includes two Inductors that are insulated from each other; or, include two low-pass filters that are insulated from each other.
  • the first line pair of the central office and the second line pair of the central office can simultaneously transmit a DC voltage signal, and after being connected to the terminal side device through the transmission line,
  • the terminal side device provides a DC voltage signal to the first line pair of the central office and the second line pair of the central office through the transmission line; since the transmission line corresponding to the first line pair of the central office and the second line pair of the central office are connected in parallel, the transmission can be reduced.
  • the resistance of the line increases the current in the transmission line, resulting in a larger reverse supply distance.
  • a digital subscriber line terminal device including a terminal processing module, a power supply module, a first pair of terminals, a second pair of terminals, and a terminal interface module;
  • the first line pair of the terminal that the terminal processing module passes is connected to the terminal interface module;
  • the power supply module is connected to the first line pair of the terminal;
  • a second pair of terminals connected to the terminal interface module;
  • the terminal interface module is configured to provide the first line pair of the terminal and the second line pair and the central end side of the terminal Interface to which the device is connected;
  • the first line pair of the terminal is configured to transmit a digital signal, transmit a DC voltage signal provided by the power supply module, and transmit a DC voltage signal to a second line pair of the terminal;
  • the second pair of terminals is configured to receive a DC voltage signal that is transmitted by the first line pair of the terminal, and provide the DC voltage signal to the central office side device;
  • the terminal processing module is configured to process a digital signal transmitted by the first line pair of the terminal; and the power supply module is configured to provide a DC signal to the first line pair of the terminal.
  • the method further includes a terminal first isolation module, where The power supply module is connected to the first line pair of the terminal by using the first isolation module of the terminal;
  • the first isolation module of the terminal is configured to isolate a digital signal between the power supply module and the first line pair of the terminal, so that the DC voltage signal provided by the power supply module passes to reach the first line pair of the terminal.
  • the second aspect in conjunction with the first possible implementation of the second aspect, further includes a second isolation module of the terminal, where the first end of the second pair of the terminal passes the second terminal The isolation module is connected to the first pair of the terminal;
  • the second isolation module of the terminal is configured to isolate a digital signal between the second pair of the terminal and the first pair of the terminal, so that the DC voltage signal transmitted by the first line of the terminal passes to reach the terminal The second pair.
  • a third possible implementation manner of the second aspect is provided.
  • the third possible implementation manner of the second aspect Further comprising a terminal switching module, wherein the second isolation module of the terminal is connected to the first line pair of the terminal by using the terminal switching module;
  • the terminal switching module is configured to control the connection between the second isolation module of the terminal and the first pair of the terminal.
  • the terminal continuity module includes at least two switches that are insulated from each other.
  • the terminal first isolation module includes at least two inductors insulated from each other; or at least two low-pass filters insulated from each other.
  • the terminal second isolation module includes two inductors insulated from each other; or includes two low-pass filters insulated from each other.
  • the first line pair of the terminal of the terminal device and the second line pair of the terminal may simultaneously transmit a DC voltage signal, and after connecting through the transmission line to the central office side device,
  • the transmission line provides a DC voltage signal to the first line pair of the central office and the second line pair of the central office; since the transmission line corresponding to the first line pair of the terminal and the second line pair of the terminal are connected in parallel, It is possible to reduce the resistance of the transmission line and increase the current in the transmission line, thereby obtaining a larger reverse supply distance.
  • a digital subscriber line reverse power supply system comprising: the central office apparatus provided in a possible implementation manner of any one of the second aspect to the sixth aspect, and at least one second To the terminal device provided in any one of the possible implementation manners of the sixth aspect, the terminal interface module of each of the terminal devices is connected to the central office interface module of the central office device by using the first line pair and the second line pair, The first line pair corresponds to a first line pair of the terminal device and a first line pair of the central office of the central office device, and the first line pair and the second line pair of the terminal device of the terminal device The central line pair of the central office device corresponds to the second line pair.
  • the beneficial effects of the embodiments of the present invention are as follows:
  • FIG. 1 is a schematic structural diagram of a digital subscriber line reverse power supply system in the prior art
  • FIG. 2 is a schematic structural diagram of a first digital subscriber line office equipment according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a second digital subscriber line office equipment according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a fourth digital subscriber line office equipment according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a first digital subscriber line office equipment according to an embodiment of the present invention
  • FIG. 8 is a schematic structural diagram of a second digital subscriber line terminal device according to an embodiment of the present invention
  • FIG. 8 is a schematic structural diagram of a third digital subscriber line terminal device according to an embodiment of the present invention
  • FIG. 9 is a schematic structural diagram of a fourth digital subscriber line terminal device according to an embodiment of the present invention
  • FIG. 10 is a schematic structural diagram of a digital subscriber line reverse power supply system according to an embodiment of the present invention; Figure. detailed description
  • Embodiments of the present invention provide a digital subscriber line office equipment and a terminal device to achieve the purpose of increasing the reverse power supply distance.
  • the solution of the embodiment of the present invention will be described in detail below with reference to the attached drawings.
  • an embodiment of the present invention provides a digital subscriber line office equipment 200A, including a central office processing module 201, a power receiving module 202, at least one central office first line pair 203, and at least one central office second line pair 204.
  • the central office interface module 207; the central office first line pair 203 and the central office second line pair 204 are corresponding.
  • the central office processing module 201 is connected to the central office interface module 207 by the central office first line pair 203; the power receiving module 202 is connected to the central office first line pair 203; The first end of the second pair 204 is connected to the corresponding first line pair 203, and the second end of the second line pair 204 is connected to the central interface module 207.
  • the central office interface module 207 is configured to provide an interface between the central office first line pair 203 and the central office second line pair 204 to connect to the terminal side device.
  • the central first line pair 203 is configured to transmit a digital signal, receive a DC voltage signal transmitted from the terminal side, and receive a DC voltage signal transmitted by the central second line pair 204.
  • the central second line pair 204 is configured to receive a DC voltage signal transmitted from the terminal side, and transmit the DC voltage signal to the central end first line pair 203.
  • the central office processing module 201 is configured to process the digital signal transmitted by the central office first line pair 203.
  • the power receiving module 202 is configured to receive each DC voltage signal transmitted by the first line pair 203 of the central office, and supply power to the device on the central office side according to each DC voltage signal.
  • the central office first line pair 203 and the central office second line pair 204 of the central office device can simultaneously transmit a DC voltage signal, and after the transmission line is connected with the terminal side device, the terminal side device passes the transmission.
  • the line provides a DC voltage signal to the central line first pair 203 and the central end second line pair 204; since the central end first line pair 203 and the central end second line pair 204 correspond to the transmission lines in parallel, the resistance of the transmission line can be reduced. , to increase the current in the transmission line, thereby obtaining a larger reverse supply distance.
  • a second digital subscriber line office equipment 200B is provided.
  • the difference between the digital subscriber line office equipment 200A and the digital subscriber line office equipment 200B further includes a central office first isolation module 205, and the power receiving module 202 passes the central office first isolation module 205 and the office.
  • the first line pair 203 is connected.
  • the central end first isolation module 205 is configured to isolate a digital signal between the power receiving module 202 and the first line pair 203 of the central office, so that the DC voltages transmitted by the central first line pair 203 are After the signal passes, the power receiving module 202 is reached.
  • each DC voltage signal transmitted by the central first line pair 203 is passed to the power receiving module 202, and the digital signal is not transmitted.
  • the power receiving module 202 digital signal transmission is not disturbed, and the stability of the reverse power supply is increased.
  • a third digital subscriber line office equipment 200C is provided.
  • the digital subscriber line office device 200A is different from the digital subscriber line office device 200A.
  • the digital subscriber line office device 200C further includes a central office second isolation module 206.
  • the first end of the central office second pair 204 is separated by the central office.
  • the module 206 is connected to the central end first pair 203.
  • the central office second isolation module 206 is configured to isolate a digital signal between the central end second pair 204 and the central first line pair 203, so that the central terminal second line 204 receives the DC voltage. After the signal passes, the first line pair 203 of the central office is reached.
  • the central office second isolation module 206 by setting the central office second isolation module 206, the DC voltage signals transmitted by the second terminal pair 204 of the central office are passed to the first line pair 203 of the central office, and the reverse power supply is increased. Stability.
  • a fourth digital subscriber line office equipment 200D is provided.
  • the digital subscriber line office equipment 200B is further configured to include a central office second isolation module 206, and the first end of the central office second line pair 204 is second isolated by the central office.
  • the module 206 is connected to the central end first pair 203.
  • the central office second isolation module 206 is configured to isolate a digital signal between the central end second pair 204 and the central first line pair 203, so that the central terminal second line 204 receives the DC voltage. After the signal passes, the first line pair 203 of the central office is reached.
  • the fourth digital subscriber line office equipment 200D sets both the central office first isolation module 205 and the central office second isolation module 206 to enable the DC voltages transmitted by the central office second line pair 204. After the signal passes, the first line pair 203 is reached, and the DC voltage signals transmitted by the central line first pair 203 are passed to the power receiving module 202, and the digital signal is not transmitted to the receiving circuit.
  • the electrical module 202 further improves the stability of digital signal transmission and reverse power supply.
  • the central office first isolation module 205 includes at least two inductors insulated from each other; or at least two low-pass filters insulated from each other.
  • the central office second isolation module 206 includes two inductors insulated from each other; or, two low-pass filters insulated from each other. The specific device selection is based on the actual design requirements, installation space and cost, and will not be described here.
  • the terminal device 200D can also provide a module with a control on/off function, such as a central office continuity module 208, and the central office second isolation module 206 passes the central office continuity module 208 and the central office first line pair. 203 connection.
  • the central office switching module 208 is configured to control the on and off of the connection between the central office second isolation module 206 and the central office first line pair 203.
  • the central office continuity module 208 can have a plurality of switches that are combined in pairs and insulated from one another. For example, two switches insulated from each other can be realized by opening the switch when it is desired to disconnect the central second isolation module 206 from the central first line pair 203.
  • the central office switching module 208 can also be provided to the digital subscriber line office equipment 200A and the digital subscriber line office equipment 200B, or can be set to other connection locations as needed.
  • the central office switching module 208 is directly disposed between the central office second line pair 204 and the central office first line pair 203; for example, FIG.
  • the central office switching module 208 is disposed between the central office first isolation module 205 and the central office first line pair 203. It can be seen that the central office continuity module 208 can be flexibly set according to needs.
  • the embodiments of the present invention are for illustrative purposes only, and the present invention is not limited thereto.
  • the digital subscriber line office equipments 200A, 200B, 200C, and 200D provided in this embodiment may be single-channel, two-way or multi-channel equipment. It can be understood that one way is represented as: central office processing module 201, power receiving module 202 The first line pair 203 of the central office, the second line pair 204 of the central office, and the central interface module 207.
  • the two paths are represented as: the central office processing module 201, the power receiving module 202, the two central office first line pairs 203, the two central office second line pairs 204, and the central office interface module 207, and the two central office first line pairs 203.
  • a two-way combination of the two-way central end pair 204 is similar to the two paths, that is, the multipath local first line pair 203 and the multipath central end second line pair 204 are respectively one-to-one.
  • an embodiment of the present invention provides a digital subscriber line terminal apparatus 300A, including a terminal processing module 301, a power supply module 302, a terminal first line pair 303, a terminal second line pair 304, and a terminal interface module 307.
  • the first line pair 303 of the terminal that is connected to the terminal processing module 301 is connected to the terminal interface module 307; the power supply module 302 is connected to the first line pair 303 of the terminal; The first line pair 303 of the terminal is connected to one end, and the second end of the second line pair 304 of the terminal is connected to the terminal interface module 307.
  • the terminal interface module 307 is configured to provide an interface between the first line pair 303 of the terminal and the second line pair 304 of the terminal and the central office side device.
  • the first line pair 303 of the terminal is configured to transmit a digital signal, transmit a DC voltage signal provided by the power supply module 302, and transmit a DC voltage signal to the second line pair 304 of the terminal.
  • the second line pair 304 of the terminal is configured to receive a DC voltage signal transmitted by the first line pair 303 of the terminal, and provide the DC voltage signal to the central office side device.
  • the terminal processing module 301 is configured to process a digital signal transmitted by the first line pair 303 of the terminal;
  • the power supply module 302 is configured to provide a DC signal to the terminal first pair 303.
  • the terminal first line pair 303 and the terminal second line pair 304 of the terminal device can simultaneously transmit a DC voltage signal, and after connecting to the central office side device through the transmission line, the first line to the central office through the transmission line
  • the line pair 203 and the central end second line pair 204 provide a DC voltage signal; since the transmission lines corresponding to the terminal first line pair 303 and the terminal second line pair 304 are connected in parallel, the resistance of the transmission line can be reduced, and the current in the transmission line can be reduced. Increase to obtain a larger reverse supply distance.
  • a second digital subscriber line terminal device 300B is provided on the basis of the digital subscriber line terminal device 300A shown in Fig. 6, a second digital subscriber line terminal device 300B is provided.
  • the digital subscriber line terminal device 300B further includes a terminal first isolation module 305, and the power supply module 302 passes the terminal first isolation module 305 and the terminal first line pair 303. connection.
  • the terminal first isolation module 305 is configured to isolate a digital signal between the power supply module 302 and the first line pair 303 of the terminal, so that the DC voltage signal provided by the power supply module 302 passes through the terminal. A pair of 303.
  • the DC voltage signal provided by the power supply module 302 is passed, and the first line pair 303 of the terminal is reached, thereby increasing the stability of the reverse power supply.
  • a third digital subscriber line terminal device 300C is provided on the basis of the digital subscriber line terminal device 300A shown in Fig. 6, a third digital subscriber line terminal device 300C is provided.
  • the digital subscriber line terminal device 300B further includes a terminal second isolation module 306, and the first end of the terminal second pair 304 passes through the terminal second isolation module 306 and the The first line pair 303 of the terminal is connected.
  • the second isolation module 306 is configured to isolate a digital signal between the second pair 304 of the terminal and the first pair 303 of the terminal, so that the DC voltage signal transmitted by the first line pair 303 of the terminal passes Arriving at the terminal second line pair 304.
  • the DC voltage signal transmitted by the first line pair 303 of the terminal is passed, and the second line pair 304 of the terminal is reached, and the terminal is isolated first.
  • the digital signal transmitted by the pair 303, the second pair 304 of the terminal does not end to the end
  • the first line pair 303 affects the transmission of digital signals, thereby increasing the stability of digital signal transmission and reverse power supply.
  • a fourth digital subscriber line terminal device 300D is provided on the basis of the digital subscriber line terminal device 300B shown in Fig. 7, a fourth digital subscriber line terminal device 300D is provided.
  • the digital subscriber line terminal device 300D further includes a terminal second isolation module 306, and the first end of the terminal second pair 304 passes through the terminal second isolation module 306 and the The first line pair 303 of the terminal is connected.
  • the second isolation module 306 is configured to isolate a digital signal between the second pair 304 of the terminal and the first pair 303 of the terminal, so that the DC voltage signal transmitted by the first line pair 303 of the terminal passes Arriving at the terminal second line pair 304.
  • the fourth digital subscriber line terminal device 300D sets both the terminal first isolation module 305 and the terminal second isolation module 306, so that the DC voltage signals provided by the power supply module 302 pass through the terminal.
  • An isolation module 305 arrives at the first line pair 303 of the terminal, so that the DC voltage signal transmitted by the first line pair 303 of the terminal passes through the second isolation module 306 of the terminal and reaches the second line pair 304 of the terminal, and the number The signal is not transmitted to the second pair 304 of the terminal, further improving the stability of digital signal transmission and reverse power supply.
  • the terminal first isolation module 305 includes at least two inductors insulated from each other; or at least two low-pass filters insulated from each other.
  • the terminal second isolation module 306 includes two inductors insulated from each other; or, two low-pass filters insulated from each other. The specific device selection is based on the actual design requirements, installation space and cost, and will not be described here.
  • a module having a control on/off function such as a terminal on/off module 308, may be provided, and the terminal second isolation module 306 is connected to the terminal first line pair 303 through the terminal on/off module 308.
  • the terminal on/off module 308 is configured to control the connection between the second isolation module 306 of the terminal and the first line pair 303 of the terminal.
  • the terminal continuity module 308 can have a plurality of switches that are combined in pairs and insulated from each other. For example, two switches insulated from each other, thereby opening the connection when it is desired to disconnect the second isolation module 306 of the terminal from the first wire pair 303 of the terminal The switch can be implemented.
  • the terminal switching module 308 can also be provided to the digital subscriber line terminal device 300A and the digital subscriber line terminal device 300B, or can be set to other connection locations as needed.
  • the terminal switching module 308 is directly disposed between the terminal second line pair 304 and the terminal first line pair 303; for example, the number shown in FIG.
  • the terminal switching module 308 is disposed between the terminal first isolation module 305 and the terminal first line pair 303. It can be seen that the terminal switching module 308 can be flexibly set according to needs.
  • the embodiments of the present invention are for illustrative purposes only, and the present invention is not limited thereto.
  • an embodiment of the present invention provides a digital subscriber line reverse power supply system 400, including the digital subscriber line office equipment 200 provided in Embodiment 1, and the digital subscriber line terminal provided in at least one embodiment 2.
  • the device 300, the terminal interface module 307 of each of the digital subscriber line terminal devices is connected to the central office interface module 207 of the digital subscriber line office equipment 200 via a first pair 403 and a second pair 404, the first The pair 403 corresponds to the terminal first line pair 303 of the terminal device 300 and the one-office first line pair 203 of the digital subscriber line office device 200, the second line pair 404 and the digital subscriber line terminal
  • the terminal second line pair 304 of the device 300 corresponds to a central end second line pair 204 of the central office device.
  • At least one of the digital subscriber line office devices 200 and the digital subscriber line terminal device 300 are generally provided with a separate module.
  • digital user central office device 200A, 200B, 200C or 200D cooperates with digital user terminal device 300D; for example, digital user central office device 200B cooperates with digital user terminal device 300C; for example, digital user central office device 200C and digital
  • the user terminal device 300B cooperates; for example, the digital user central office device 200D cooperates with the digital user terminal device 300A, 300B or 300C; thereby forming a digital subscriber line reverse power supply system required by the user, and the specific reference numerals refer to FIG. 2 to FIG. 9.
  • the first line pair 203 of the central end of the digital subscriber line office equipment 200 The central end second pair 204 is connected to the terminal first line pair 303 and the second line pair 304 of the digital subscriber line terminal device 300, and can simultaneously transmit a DC voltage signal, and the digital subscriber line terminal device 300 Providing a DC voltage signal to the central first line pair 203 and the central end second line pair 204 through the transmission line; because the double line pair transmits the DC voltage signal in parallel, the resistance of the transmission line can be reduced, and the current in the transmission line is increased. Thereby obtaining a larger reverse power supply distance.
  • the digital signal involved in the embodiment of the present invention may be a signal generated by a digital subscriber line technology such as G.Fast, VDSL2/ADSL2/2+, or a signal generated by other digital subscriber line technologies. There are no special rules here.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the application can take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

Abstract

L'invention concerne un dispositif côté local de ligne d'abonné numérique, un dispositif terminal et un système d'alimentation électrique inverse de façon à atteindre l'objectif d'augmentation d'une distance d'alimentation électrique inverse. Le dispositif côté local de ligne d'abonné numérique comprend : un module de traitement côté local, un module de réception d'énergie, au moins une première paire de lignes côté local, au moins une seconde paire de lignes côté local et un module d'interface côté local ; la première paire de lignes côté local est en correspondance biunivoque avec la seconde paire de lignes côté local ; le module de traitement côté local est connecté au module d'interface côté local par l'intermédiaire de la première paire de lignes côté local ; le module de réception d'énergie est connecté à la première paire de lignes côté local ; une première extrémité de la seconde paire de lignes côté local est connectée à la première paire de lignes côté local correspondante ; et une seconde extrémité de la seconde paire de lignes côté local est connectée au module d'interface côté local ; et en permettant à la seconde paire de lignes côté local et à la première paire de lignes côté local de transmettre simultanément un signal de tension continu (CC), après connexion à un côté terminal, le courant d'émission des paires de lignes connectées au côté terminal est accru de façon à augmenter une distance d'alimentation électrique inverse du côté terminal.
PCT/CN2014/075212 2014-04-11 2014-04-11 Dispositif côté local de ligne d'abonné numérique, dispositif terminal et système d'alimentation électrique inverse WO2015154311A1 (fr)

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CN106301546B (zh) * 2015-06-09 2019-07-02 中兴通讯股份有限公司 反向供电线路检测处理方法及装置
EP3451581B1 (fr) * 2016-06-16 2020-08-05 Huawei Technologies Co., Ltd. Dispositif de commutation
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