WO2020015181A1 - G.fast信号、VDSL2信号和话音信号在铜线中的频分复用传输方法及装置 - Google Patents

G.fast信号、VDSL2信号和话音信号在铜线中的频分复用传输方法及装置 Download PDF

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WO2020015181A1
WO2020015181A1 PCT/CN2018/107991 CN2018107991W WO2020015181A1 WO 2020015181 A1 WO2020015181 A1 WO 2020015181A1 CN 2018107991 W CN2018107991 W CN 2018107991W WO 2020015181 A1 WO2020015181 A1 WO 2020015181A1
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signal
vdsl2
fast
pass filter
low
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PCT/CN2018/107991
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English (en)
French (fr)
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郭为民
莫雨涵
王强
王季年
王慧
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北京科络捷通讯产品有限责任公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/04—Frequency-transposition arrangements
    • H04J1/045—Filters applied to frequency transposition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/12—Arrangements for reducing cross-talk between channels

Definitions

  • the invention relates to the field of network communication technology, and in particular to a frequency division multiplexing transmission method and device for G.fast signals, VDSL2 signals and voice signals in copper wires.
  • the traditional copper wire network is dominated by voice services, and early data services are provided through audio dial-up modems and ISDN. Its limited access rate is difficult to meet the growing demand for data service bandwidth.
  • ADSL advanced digital subscriber line
  • the frequency division multiplexing technology is used to divide an ordinary telephone line into three relatively independent channels of telephone, uplink data and downlink data, thereby avoiding mutual interference. Users can surf the Internet while making a call without worrying about the decline in Internet speed and call quality.
  • VDSL2 is a very high-speed digital subscriber line. From a technical point of view, VDSL2 can actually be regarded as an upgrade of ADSL, and its average transmission rate can be 5 to 10 times higher than ADSL.
  • the network services provided by broadband access have also developed from the earliest low-bandwidth applications such as electronic bulletin board systems (BBS) and web browsing, to high-bandwidth applications such as voice calls, video calls, high-definition television, and virtual reality.
  • BSS electronic bulletin board systems
  • high-bandwidth applications such as voice calls, video calls, high-definition television, and virtual reality.
  • G.fast is a standardization proposal of the International Telecommunication Union (ITU), the purpose of which is to reach the speed of optical fiber on copper wires up to 250m in length, that is, more than 1Gpbs.
  • ITU International Telecommunication Union
  • G.fast's high-frequency band will initially use 106MHz and will expand to 212MHz in the future.
  • G.fast signals can reuse existing copper wire resources in mature cells, and use wider spectrum resources to provide high-bandwidth access up to 1Gpbs on optical fiber on traditional copper wires, enabling faster access, faster deployment, and more Fast earnings.
  • the broadband frequency band of the voice signal is 0 Hz to f 1 Hz
  • the broadband frequency band of the VDSL2 signal is f 1 Hz to f 3 Hz.
  • VDSL2 signals occupy a limited frequency band width, and copper broadband access rates are insufficient to meet the needs of super applications.
  • Figure 6 shows a schematic diagram of the G.fast wideband frequency band.
  • the wideband frequency band of the G.fast signal is f 2 Hz to f 4 Hz, where f 1 ⁇ f 2 ⁇ f 3 ⁇ f 4 .
  • the broadband access rate of copper wire has entered the era of Gpbs, providing a broad space for more super applications.
  • the main purpose of the present invention is to provide a frequency division multiplexing transmission method and device for G.fast signal, VDSL2 signal and voice signal in copper wire, and adopt the frequency division filtering technology to overcome the defects in the prior art.
  • the method for frequency-division multiplexing transmission of G.fast signals, VDSL2 signals and voice signals in copper wires includes the steps of:
  • A. Select the G.fast signal, the VDSL2 signal, and the two signals adjacent to each other in the frequency band to perform a coupling to form a first mixed signal and a separate signal that is not selected;
  • a high-pass signal of the two signals forming the first mixed signal is subjected to high-pass filtering, and the other signal is subjected to low-pass filtering, and then multiplexed into the frequency band occupied by the first mixed signal;
  • a high-pass signal of the two signals forming the second mixed signal is subjected to high-pass filtering, the other signal is subjected to low-pass filtering, and then multiplexed into a frequency band occupied by the second mixed signal.
  • the three signals are coupled two times in sequence to ensure that each signal does not overlap and does not affect each other. This solves the problem that the G.fast technology directly accesses the existing VDSL2 broadband network and interferes with each other, and meets the needs of VDSL2 users to increase the copper wire broadband access rate.
  • the two adjacent signals include a VDSL2 signal and a voice signal
  • the high-pass filtering and the low-pass filtering use the frequency upper limit f 1 Hz of the wideband frequency band of the voice signal as a node to filter the VDSL2 signal and the voice signal respectively;
  • step B the high-pass filtering and the low-pass filtering are performed at any frequency within a range from a frequency lower limit f 2 Hz of the wideband frequency band of the G.fast signal to a frequency upper limit f 3 Hz of the wideband frequency band of the VDSL2 signal as Node, the high-pass filter removes the G.fast signal from the frequency band of f 2 Hz to this node, and retains the G.fast signal from the frequency band of this node to f 4 Hz;
  • Low-pass filtering removes the mixed signal higher than the frequency band of the node, and retains the mixed signal lower than the node
  • any frequency in the range of the lower frequency limit f 2 Hz of the broadband frequency band of the G.fast signal to the upper frequency limit f 3 Hz of the broadband frequency band of the VDSL2 signal is a node, which will be higher than the G.fast of the node. Signal coupling or separation. Since the transmission distance required by G.fast technology is only about one kilometer, the higher frequency band in the copper wire can be used for transmission. Based on this, even if the low-frequency part where the G.fast signal and the VDSL2 signal coincide is filtered out, it will not affect the transmission speed of the G.fast signal. It solves the problem that the G.fast technology directly accesses the existing VDSL2 signal copper wire to cause mutual interference between the two, and meets the needs of VDSL2 users to increase the copper wire broadband access rate.
  • step B the high-pass filtering and the low-pass filtering use the frequency upper limit f 3 Hz of the broadband band of the VDSL2 signal as a node, and the high-pass filtering filters out the G.fast signals lower than the frequency band f 3 Hz, and reserves f G.fast signals from 3 Hz to f 4 Hz;
  • Low-pass filtering preserves the mixed signal in the frequency band below f 3 Hz.
  • the low-frequency portion of the G.fast signal is filtered, on the one hand, to ensure the needs of users using VDSL2 signals, and to make full use of the existing resources of VDSL2 users. ; On the other hand, filtering out the low-frequency part of the G.fast signal will not basically have a negative impact on its transmission, killing two birds with one stone.
  • the two adjacent signals include a G.fast signal and a VDSL2 signal;
  • the high-pass filtering and the low-pass filtering are based on any frequency within a range of the lower frequency limit f 2 Hz of the wideband frequency band of the G.fast signal to the upper frequency limit f 3 Hz of the wideband frequency band of the VDSL2 signal as a node, and the high-pass filtering G.fast signals from the frequency band of f 2 Hz to the node are filtered, and G.fast signals from the frequency band of the node to f 4 Hz are retained;
  • Low-pass filtering removes VDSL2 signals from the node to the f 3 Hz frequency band, and retains the VDSL2 signals from f 1 Hz to the node;
  • step B the high-pass filtering and the low-pass filtering use the frequency upper limit f 1 Hz of the wideband frequency band of the voice signal as a node to filter the mixed signal and the voice signal respectively;
  • any frequency in the range of the lower frequency limit f 2 Hz of the broadband frequency band of the G.fast signal to the upper frequency limit f 3 Hz of the broadband frequency band of the VDSL2 signal is a node, which will be higher than the G.fast of the node.
  • Signal coupling or separation Since the transmission distance required by G.fast technology is only about one kilometer, the higher frequency band in the copper wire can be used for transmission. Based on this, even if the low-frequency part where the G.fast signal and the VDSL2 signal coincide is filtered out, it will not affect the transmission speed of the G.fast signal. It solves the problem of mutual interference caused by G.fast technology directly accessing existing VDSL2 signal copper wires due to overlapping frequency bands. Voice signals, VDSL2 signals and filtered G.fast signals do not overlap in the frequency band, which can achieve frequency Dividing and multiplexing meets the needs of VDSL2 users to increase copper wire broadband access rates.
  • step A the high-pass filtering and the low-pass filtering use the frequency upper limit f 3 Hz of the broadband band of the VDSL2 signal as a node, and the high-pass filtering removes G.fast signals in the frequency band f 2 Hz to f 3 Hz, and reserves f G.fast signals from 3 Hz to f 4 Hz;
  • Low-pass filtering preserves VDSL2 signals in the f 1 Hz to f 3 Hz band.
  • the f 3 Hz is used as a node, so that the voice signal, the VDSL2 signal and the filtered G.fast signal do not overlap in the frequency band, and frequency division multiplexing can be realized, which satisfies VDSL2 users to increase the copper wire broadband access rate. Demand.
  • this application also provides a multiplex transmission device for G.fast signals, VDSL2 signals, and voice signals in copper wires, including:
  • a first splitter configured to couple two signals adjacent to each other in the selected G.fast signal, VDSL2 signal, and voice signal in a frequency band to form a first mixed signal and a single signal that is not selected;
  • the one-time coupling includes performing high-pass filtering on a high-band signal of the two signals forming the first mixed signal, and performing low-pass filtering on the other signal, and then multiplexing the signal to a frequency band occupied by the first mixed signal;
  • a second splitter connected to the first splitter, and coupling the two signals of the mixed signal and the separate signal to form a second mixed signal for transmission in a copper wire;
  • the secondary coupling includes performing high-pass filtering on a high-frequency signal of the two signals forming the second mixed signal, and performing low-pass filtering on the other signal, and then multiplexing the signal to a frequency band occupied by the second mixed signal.
  • the voice signal, VDSL2 signal and filtered G.fast signal do not overlap in the frequency band, and frequency division multiplexing can be realized. It solves the problem that the G.fast technology directly accesses the existing VDSL2 signal copper wire to cause mutual interference between the two, and meets the needs of VDSL2 users to increase the copper wire broadband access rate.
  • the first separator includes a high-pass filter and a low-pass filter
  • One end of the high-pass filter of the first splitter is connected to a device transmitting a VDSL2 signal, and one end of the low-pass filter of the first splitter is connected to a device transmitting a voice signal;
  • the other end and the other end of the low-pass filter are respectively connected to a mixed signal port;
  • the second separator includes a high-pass filter and a low-pass filter
  • One end of the high-pass filter of the second splitter is connected to a device transmitting a G.fast signal, and the other end is connected to a copper wire;
  • One end of the low-pass filter of the second splitter is connected to the mixed signal port, and the other end is connected to the copper wire.
  • the two signals of the three pass signals are coupled using the bidirectional conduction characteristics of the high-pass and low-pass filters in the splitter to ensure that each signal is relative. Clean and not affecting each other.
  • the problem that the G.fast technology directly accesses the existing VDSL2 signal copper wire and causes the two to interfere with each other is solved, and the requirement of VDSL2 users to increase the copper wire broadband access rate is solved.
  • the first separator includes a high-pass filter and a low-pass filter
  • One end of the high-pass filter of the first splitter is connected to a device transmitting a G.fast signal, and one end of the low-pass filter of the first splitter is connected to a device transmitting a VDSL2 signal;
  • the other end of the high-pass filter and the other end of the low-pass filter of the first splitter are respectively connected to a mixed signal port;
  • the second separator includes a high-pass filter and a low-pass filter
  • One end of the high-pass filter of the second splitter is connected to the mixed signal port, and the other end is connected to the copper wire;
  • One end of the low-pass filter of the second splitter is connected to a device that transmits a voice signal, and the other end is connected to the copper wire.
  • the two signals are coupled twice by using the two-way conduction characteristics of the high-pass and low-pass filters in the splitter to ensure that each signal is a frequency band. No overlap and no mutual influence.
  • the problem that the G.fast technology directly accesses the existing VDSL2 signal copper wire and causes the two to interfere with each other is solved, and the requirement of VDSL2 users to increase the copper wire broadband access rate is solved.
  • FIG. 1 is a flowchart of a frequency division multiplexing transmission method of G.fast, VDSL2, and voice signals in a copper wire;
  • FIG. 2 is a schematic diagram of a first embodiment of a frequency-division multiplexing transmission device for G.fast, VDSL2, and voice signals in copper wires;
  • FIG. 3 is a schematic diagram of a second embodiment of a frequency division multiplexing transmission device for G.fast, VDSL2, and voice signals in copper wires;
  • FIG. 4 is a schematic diagram of a broadband frequency band in which G.fast, VDSL2, and voice signals are frequency-division multiplexed over copper wires;
  • FIG. 5 is a schematic diagram of a broadband band of a VDSL2 and a voice signal in a copper wire in the prior art
  • FIG. 6 is a schematic diagram of a wide band of G.fast and voice signals in a copper wire in the prior art.
  • the multiplexing transmission method and device of the G.fast signal, VDSL2 signal, and voice signal in the copper wire according to the present invention are described in detail below with reference to FIGS. 1 to 4.
  • the frequency division multiplexing transmission method of G.fast signal, VDSL2 signal and voice signal in copper wire includes the following steps:
  • S100 The G.fast signal, VDSL2 signal and voice signal are coupled once at the central office to form a group of mixed signals and a group of separate signals.
  • the central office refers to a party providing terminal access, and generally includes a switch or a data node machine. As shown in Figure 2, the central transmission unit of the central office is used to transmit VDSL2 signals and G.fast signals. Corresponding to ATU-C / VDSL2 and ATU-C / G.fast shown in Figure 2, respectively, it is composed of asymmetric digital user ring lines. Partial telephone exchange modem. The central office's telephone switching equipment transmits voice signals.
  • the broadband frequency band of the voice signal is 0 Hz to f 1 Hz
  • the broadband frequency band of the VDSL2 signal is f 1 Hz to f 3 Hz
  • the broadband frequency band of the G.fast signal is f 2 Hz to f 4 Hz, f 1 ⁇ F 2 ⁇ f 3 ⁇ f 4 , where f 1 is 4KH, f 2 is 1 MHz, f 3 is 17 MHz, and f 4 is 216 MHz.
  • a first end splitter is provided, and the first end splitter includes a high-pass filter and a low-pass filter.
  • the two ends of the high-pass filter are respectively connected to ATU-C / VDSL2 and the low-pass filter port in the second splitter of the central office described later; the two ends of the low-pass filter are respectively connected to the telephone switching equipment and the office.
  • Low-pass filter port in the second splitter Central end The port where the high-pass filter and the low-pass filter in the first splitter are connected to the second splitter is called a mixed-signal port.
  • the two filters of the first splitter at the central office perform high-pass and low-pass filtering on the frequency upper limit f 1 Hz of the wideband of the voice signal as a node, thereby filtering the voice signal and the VDSL2 signal respectively.
  • the first splitter at the central office couples the voice signal and the VDSL2 signal to form a group of mixed signals.
  • S200 Perform secondary coupling of the mixed signal and the separate signal at the central office to form a mixed signal of G.fast, VDSL2, and voice signals for transmission to the network copper wire.
  • a second end splitter is provided, and the second end splitter also includes a high-pass filter and a low-pass filter.
  • the two ends of the high-pass filter are respectively connected to ATU-C / G.fast and the network copper wire.
  • the network copper wire is a telephone line and is used to connect the central office and the user terminal described later.
  • the mixed signal port of the first splitter at the central office and the network copper wire are respectively connected.
  • the two filters of the second splitter of the central office take the frequency upper limit f 3 Hz of the broadband band of the VDSL2 signal as a node, and perform the G.fast signal and step S100 on the ATU-C / G.fast transmission.
  • the mixed signal of the voice signal and the VDSL2 signal transmitted by the first splitter at the central office is subjected to high-pass and low-pass filtering, respectively, so as to filter out the G.fast signal and the mixed signal, respectively.
  • the second splitter at the central office couples the mixed signal and the G.fast signal transmitted by ATU-C / G.fast into the network copper wire to form the G.fast signal, VDSL2 signal, and voice as shown in FIG. 4
  • the mixed signal is transmitted to the client through the copper network cable.
  • the upper frequency limit f 3 Hz of the broadband band of the VDSL2 signal is taken as a node, and is not limited to this in actual use.
  • the lower frequency limit f 2 of the broadband frequency band of the G.fast signal is used. Any frequency in the range from Hz to the upper frequency band f 3 Hz of the broadband band of the VDSL2 signal is a node, and is transmitted to the G.fast signal transmitted by ATU-C / G.fast and the first splitter in step S100
  • the mixed signals of the voice signal and the VDSL2 signal are respectively subjected to high-pass and low-pass filtering, thereby filtering out the G.fast signal and the mixed signal, respectively.
  • high-pass filtering removes G.fast signals from the frequency band of f 2 Hz to the node, and retains G.fast signals from the frequency band of the node to f 4 Hz; low-pass filtering removes the mixed signals higher than the frequency band of the node, and retains The mixed signal is lower than that of the node.
  • the user terminal corresponds to the central office.
  • a second splitter at the user end is provided, which includes a high-pass filter and a low-pass filter inside.
  • the two ends of the high-pass filter are respectively connected to the network copper wire and the user-side G.fast modem, which correspond to ATU-R / G.fast shown in Figure 2.
  • the two ends of the low-pass filter are connected to the network copper wire and The mixed-signal port in the user-side first splitter described later.
  • the two filters in the user-side second splitter use the upper limit f 3 Hz of the broadband band of the VDSL2 signal as a node to perform high-pass and low-pass filtering on the mixed signal of the G.fast signal, VDSL2 signal, and voice signal to separate the individual G .fast signals, and mixed signals including VDSL2 signals and voice signals.
  • step S400 On the user side, the mixed signal in step S300 is separated twice to separate two sets of separate signals.
  • a user-side first splitter is provided, and the user-side first splitter also includes a high-pass filter and a low-pass filter.
  • the two ends of the high-pass filter are respectively connected to the low-pass filter port of the user-side second splitter and the user-side VDSL2 modem, corresponding to ATU-R / VDSL2 shown in FIG. 2;
  • the low-pass filter port of the second splitter at the user end is connected to a telephone.
  • the connection end of the high-pass filter, the low-pass filter, and the second splitter in the first splitter at the user end is called a mixed signal port of the first splitter.
  • the two filters perform high-pass and low-pass filtering on a mixed signal of a VDSL2 signal and a voice signal by using an upper limit f 1 Hz of a wideband frequency band of the voice signal as a node.
  • the VDSL2 signal and the voice signal are separated.
  • the above steps are described by taking the output from the central office and the reception by the client as an example.
  • the filters in the above-mentioned local-end splitter and user-end splitter are bidirectional in their passband frequency range, that is, signals can be transmitted from either end to the other end.
  • the user-side second splitter couples the VDSL2 signal and the voice signal to form a mixed signal
  • the user-side first splitter couples the G.fast signal with the aforementioned mixed signal to form a G.fast signal, a VDSL2 signal, and a voice signal. Mixed signal.
  • the second splitter at the office end separates the G.fast signal, the VDSL2 signal, and the voice signal into a G.fast signal and a mixed signal composed of the VDSL2 signal and the voice signal.
  • the mixed signal composed of VDSL2 signal and voice signal is separated into VDSL2 signal and voice signal.
  • the first splitter at the central office and the first splitter at the user terminal use the upper limit f 3 Hz of the broadband band of VDSL2 as a node, and filter out the G.fast signals lower than the frequency band of f 3 Hz.
  • G.fast technology requires a transmission distance of only about one kilometer (shorter distance), it can use higher frequency bands in copper wires for transmission. Based on this, even if the low-frequency part of the G.fast signal that overlaps with the VDSL2 signal is filtered (corresponding to filtering out the broadband frequency band of G.fast signal from f 2 Hz to f 3 Hz), it will not affect the transmission speed of G.fast signal. .
  • the voice signal, the VDSL2 signal and the G.fast signal can be transmitted in the copper wire network at the same time without mutual interference, forming a three-band frequency division multiplex as shown in FIG.
  • Access to the existing VDSL2 signal copper wire causes mutual interference between the two, which meets the needs of VDSL2 users to increase the copper wire broadband access rate.
  • the present invention also provides a second embodiment of a frequency-division multiplexing transmission method for G.fast signals, VDSL2 signals, and voice signals in copper wires. As shown in FIG. 3, the method includes the following steps:
  • S100 The G.fast signal, VDSL2 signal and voice signal are coupled once at the central office to form a group of mixed signals and a group of separate signals.
  • a first end splitter is provided, and the first end splitter includes a high-pass filter and a low-pass filter.
  • the two ends of the high-pass filter are respectively connected to the central office ATU-C / G.fast and the high-pass filter port in the second splitter of the central office described later; the two ends of the low-pass filter are respectively connected to the local ATU-C / VDSL2 and the high-pass filter port in the central splitter.
  • the connection end of the high-pass filter and the low-pass filter in the first splitter of the central office and the second splitter of the local office described later is called a mixed signal port.
  • the two filters of the first splitter at the central office use the upper frequency limit f 3 Hz of the VDSL2 broadband frequency band as the node to perform high-pass and low-pass filtering, respectively, so as to filter out the VDSL2 signal and G.fast respectively. signal.
  • the first splitter at the central office couples the VDSL2 signal transmitted by ATU-C / VDSL2 and the G.fast signal transmitted by ATU-C / G.fast to form a group of mixed signals.
  • the upper frequency limit f 3 Hz of the broadband band of the VDSL2 signal is taken as a node, and is not limited to this in actual use.
  • the lower frequency limit f 2 of the broadband frequency band of the G.fast signal is used.
  • Any frequency in the range of the node is a node, and performs GTU on ATU-C / G.fast and VDSL2 on ATU-C / VDSL2. High-pass and low-pass filtering, so as to filter out G.fast signals and VDSL2 signals respectively.
  • the high-pass filter removes the G.fast signal from the frequency band of f 2 Hz to the node, and retains the G.fast signal from the node to the frequency band of f 4 Hz;
  • the low-pass filter removes the VDSL2 signal from the node to the frequency band of f 3 Hz, and retains f 1 Hz to the VDSL2 signal of the node.
  • S200 The mixed signal and the separate signal are coupled twice at the central office to form a mixed signal of G.fast, VDSL2, and voice to be transmitted to the copper wire.
  • a second end splitter is provided, and the second end splitter also includes a high-pass filter and a low-pass filter.
  • the two ends of the high-pass filter are respectively connected to the mixed-signal port of the first splitter of the central office and the network copper wire, and the network copper wire is a telephone line for connecting the central office and the user terminal; the low-pass filter The two ends of the two are respectively connected to a telephone switching device and the network copper wire.
  • the two filters of the second splitter of the central office use the frequency upper limit f 1 Hz of the wideband of the voice signal as a node to separate the voice signal transmitted by the telephone switching equipment from the first central office step in step S100.
  • the mixed signals of the G.fast signal and the VDSL2 signal transmitted by the processor are subjected to high-pass and low-pass filtering, respectively, so as to filter out the voice signal and the mixed signal, respectively.
  • the second splitter at the central office couples the voice signal and the mixed signal into the network copper wire to form a mixed signal of G.fast signal, VDSL2 signal, and voice as shown in FIG. 4, and transmits the signal to the user through the network copper wire. end.
  • a second splitter at the user end which includes a high-pass filter and a low-pass filter inside.
  • the two ends of the high-pass filter are respectively connected to the network copper wire and the mixed-signal port of the user-side first splitter; the two ends of the low-pass filter are respectively connected to the network copper wire and the telephone.
  • the two filters in the second splitter at the user end use high frequency and low pass filtering of the mixed signal of G.fast signal, VDSL2 signal and voice signal with the upper frequency limit f 1 Hz of the wideband of the voice signal as the node, and separate them into separate signals.
  • Voice signals, and mixed signals including G.fast signals and VDSL2 signals.
  • step S400 On the user side, the mixed signal in step S300 is separated into two separate signals.
  • a user-side first splitter is provided, and the user-side first splitter also includes a high-pass filter and a low-pass filter.
  • the two ends of the high-pass filter are respectively connected to the high-pass filter port of the user-side second splitter and the user-side G.fast modem ATU-R / G.fast;
  • the high-pass filter port of the second splitter at the user side and the ATU-R / VDSL2 of the user side VDSL2 modem are described.
  • the end of the high-pass filter and the low-pass filter of the user-side first splitter connected to the user-side second splitter is referred to as the mixed-signal port of the user-side first splitter.
  • the two filters use the frequency upper limit f 3 Hz of the broadband band of the VDSL2 signal as a node to perform high-pass and low-pass filtering on the mixed signal of the VDSL2 signal and the G.fast signal.
  • the VDSL2 signal and the G.fast signal are separated.
  • the second embodiment also uses the output from the central office and the reception from the client as an example. It is not difficult to understand that it also includes the output from the user side and the reception by the central office, which will not be repeated here.
  • This embodiment is the same as the technical problem solved in the first embodiment, and it is to filter out the overlapping part between the low-frequency region of the G.fast signal and the high-frequency region of the VDSL2, so that the voice signal, the VDSL2 signal, and the G.fast signal can be Transmission in copper network without mutual interference.
  • the present invention also provides a frequency-division multiplexing transmission device for G.fast, VDSL2, and voice signals in copper wires, including a central office and a user terminal connected through a network copper wire.
  • FIG. 2 is a schematic diagram of a first embodiment of the frequency division multiplexing transmission device.
  • the central office includes:
  • the central transmission unit, ATU-C / VDSL2 and ATU-C / G.fast shown in Figure 2, are used to transmit VDSL2 signals and G.fast signals, respectively.
  • Telephone switching equipment for transmitting voice signals.
  • the frequency division multiplexing transmission device includes a central office first splitter and a central office second splitter.
  • the first splitter at the local end includes a high-pass filter and a low-pass filter.
  • Both ends of the first central office separator high-pass filter are connected to the low pass filter port ATU-C / VDSL2 central office and the second separator, the upper limit of the voice signal at a frequency f 1 of the broadband spectrum Hz is the node, filtering out VDSL2 signals greater than f 1 Hz;
  • the two ends of the low-pass filter in the central office first splitter are respectively connected to the telephone switching equipment and the low-pass filter port in the central office second splitter, and the frequency upper limit f of the wide band of the voice signal is f 1 Hz is the node, filtering out voice signals smaller than f 1 Hz.
  • One end of the high-pass filter and the low-pass filter in the first splitter of the central office and the low-pass filter in the second splitter of the central office is a mixed signal port, which realizes the filtered VDSL2 signal and voice.
  • the signals are coupled to form a mixed signal of VDSL2 signals and voice signals.
  • the local-side second splitter includes a high-pass filter and a low-pass filter.
  • the two ends of the high-pass filter in the second splitter of the central office are respectively connected to the G.fast port of the central transmission unit and the network copper wire, and the frequency upper limit f 3 Hz of the broadband band of the VDSL2 signal is used as a node to filter out more than f 3 G.fast signal in Hz;
  • the network copper wire is a telephone line, which is used to connect the central office and the user terminal described later;
  • the two ends of the low-pass filter in the second splitter of the central office are respectively connected to the mixed signal port of the first splitter of the central office and the network copper wire, and the frequency upper limit f 3 Hz of the broadband band of the VDSL2 signal is used as a node. Filter out mixed signals of VDSL2 signals and voice signals less than f 3 Hz.
  • the high-pass filter and the connection end of the network copper wire and the low-pass filter in the second splitter of the central office are connected to the connection end of the network copper wire, thereby realizing the filtered VDSL2 signal and the voice signal.
  • G.fast signals are coupled to form a mixed signal of G.fast signals, VDSL2 signals, and voice signals.
  • the second splitter of the central office uses the frequency upper limit f 3 Hz of the broadband band of the VDSL2 signal as a node, which is not limited to this in actual use.
  • the G.fast signal is used. Any frequency in the range of the lower frequency band f 2 Hz of the broadband frequency band to the upper frequency band f 3 Hz of the broadband frequency band of the VDSL2 signal is a node.
  • step S100 For the G.fast signal transmitted by ATU-C / G.fast and the central office in step S100
  • the mixed signal of the voice signal and the VDSL2 signal transmitted by the first splitter at the end is subjected to high-pass and low-pass filtering, respectively, so as to filter out the G.fast signal and the mixed signal, respectively. That is, high-pass filtering removes G.fast signals from the frequency band of f 2 Hz to the node, and retains G.fast signals from the frequency band of the node to f 4 Hz; low-pass filtering removes the mixed signals higher than the frequency band of the node, and retains The mixed signal is lower than that of the node.
  • the frequency division multiplexing transmission device further includes a user-side second splitter and a user-side first splitter.
  • the second splitter at the user end includes a high-pass filter and a low-pass filter.
  • Figure 2 shows ATU-R / G.fast, with the frequency of the VDSL2 signal broadband band.
  • the upper limit f 3 Hz is a node, and G.fast signals greater than f 3 Hz are filtered out and transmitted to ATU-R / G.fast;
  • the two ends of the low-pass filter in the second splitter of the user end are respectively connected to the mixed signal port of the network copper wire and the first splitter of the user end, and the frequency upper limit f 3 Hz of the broadband band of the VDSL2 signal is used as a node to filter out G.fast signals less than f 3 Hz are transmitted to the mixed signal port of the first splitter at the user end;
  • the first splitter at the user end includes a high-pass filter and a low-pass filter.
  • the two ends of the high-pass filter in the first splitter at the user end are connected to the low-pass filter port in the second splitter at the user end and the VDSL2 modem at the user end, as shown in Figure 2 as ATU ⁇ R / VDSL2.
  • ATU ⁇ R / VDSL2 Using the frequency upper limit f 1 Hz of the wideband of the voice signal as the node, filtering out VDSL2 signals greater than f 1 Hz and transmitting them to ATU-R / VDSL2;
  • the two ends of the low-pass filter in the first user-side splitter are respectively connected to the low-pass filter port and the telephone in the second user-side splitter, and the frequency upper limit f 1 Hz of the wideband frequency band of the voice signal is used as a node. Voice signals less than f 1 Hz are filtered out and transmitted to the telephone.
  • the structure of the second splitter at the office end and the second splitter of the user end are the same; the structure of the first splitter at the local end and the first splitter at the user end are the same. That is, the two splitters at the user side can also achieve signal coupling, and the two splitters at the local end can also achieve signal separation.
  • FIG. 3 is a schematic diagram of a second embodiment of the frequency division multiplexing transmission device.
  • the central office includes:
  • the central transmission unit, ATU-C / VDSL2 and ATU-C / G.fast shown in Figure 3, are used to transmit VDSL2 signals and G.fast signals, respectively.
  • Telephone switching equipment for transmitting voice signals.
  • the frequency division multiplexing transmission device includes a central office first splitter and a central office second splitter.
  • the first splitter at the local end includes a high-pass filter and a low-pass filter.
  • the two ends of the high-pass filter in the central office first splitter are respectively connected to ATU-C / G.fast and the high-pass filter port in the second central office splitter, and the upper limit of the frequency band of the broadband band of the VDSL2 signal is f 3 Hz. Is a node, filtering out G.fast signals greater than f 3 Hz;
  • f 3 Hz is the node, filtering out VDSL2 signals smaller than f 3 Hz.
  • the connection end of the high-pass filter and the low-pass filter in the first splitter of the central office and the high-pass filter in the second splitter of the central office is called a mixed signal port, and the filtered G.fast signals and VDSL2 signals are coupled to form a mixed signal of G.fast signals and VDSL2 signals.
  • the first splitter at the central office uses the upper frequency limit f 3 Hz of the broadband band of the VDSL2 signal as a node.
  • the G.fast signal broadband is used. Any frequency in the range of the lower frequency limit of the frequency band f 2 Hz to the upper frequency limit of the broadband frequency band of the VDSL2 signal f 3 Hz is a node, for G.fast signals and ATU ⁇ C / VDSL2 transmitted by ATU ⁇ C / G.fast
  • the transmitted VDSL2 signals are subjected to high-pass and low-pass filtering, respectively, so as to filter out G.fast signals and VDSL2 signals, respectively.
  • the high-pass filter removes the G.fast signal from the frequency band of f 2 Hz to the node, and retains the G.fast signal from the node to the frequency band of f 4 Hz;
  • the low-pass filter removes the VDSL2 signal from the node to the frequency band of f 3 Hz, and retains f 1 Hz to the VDSL2 signal of the node.
  • the second splitter at the office side includes a high-pass filter and a low-pass filter.
  • the two ends of the high-pass filter in the second office splitter are respectively connected to the mixed-signal port and the network copper wire of the first office splitter, and the frequency upper limit f 1 Hz of the broadband band of the voice signal is used as a node to filter.
  • the network copper wire is a telephone line, which is used to connect the central office and the user terminal described later;
  • the two ends of the low-pass filter in the second splitter of the central office are respectively connected to the telephone switching device and the network copper wire, and the frequency upper limit of the wideband frequency band of the voice signal f 1 Hz is used as a node to filter out the frequencies less than f 1 Hz. Voice signals.
  • connection end of the high-pass filter and the network copper wire and the connection end of the low-pass filter and the network copper wire in the second splitter of the central office realize the filtering of the voice signal and G.fast
  • the signal and the mixed signal of VDSL2 signal are coupled to form a mixed signal of G.fast signal, VDSL2 signal and voice signal.
  • the frequency division multiplexing transmission device further includes a user-side second splitter and a user-side first splitter.
  • the user-side second splitter includes a high-pass filter and a low-pass filter.
  • the two ends of the high-pass filter in the second splitter of the user end are respectively connected to the mixed signal port of the network copper wire and the first splitter of the user end, and the frequency upper limit f 1 Hz of the broadband band of the voice signal is used as a node to filter out signals greater than f 1 Hz mixed signal of G.fast signal and VDSL2, transmitted to the mixed signal port of the first splitter on the user side;
  • the two ends of the low-pass filter in the second user-side splitter are respectively connected to the mixed-signal port and the telephone of the first user-side splitter, and the upper limit of the frequency band of the voice signal f 1 Hz is used as a node to filter out less than f 1 Hz voice signal, transmitted to the telephone;
  • the first splitter at the user end includes a high-pass filter and a low-pass filter.
  • the two ends of the high-pass filter in the first user-side splitter are connected to the high-pass filter port of the second user-side splitter and the user-side G.fast modem, as shown in Figure 3 as ATU ⁇ R / G. .fast, taking the upper frequency limit f 3 Hz of the broadband band of the VDSL2 signal as the node, filtering out G.fast signals greater than f 3 Hz, and transmitting them to the G.fast port of the ATU ⁇ R / G.fast user-end modem;
  • the two ends of the low-pass filter in the first splitter at the user end are connected to the high-pass filter port of the second splitter at the user end and the VDSL2 modem at the user end, as shown in Figure 3 as ATU-R / VDSL2.
  • the VDSL2 signal less than f 3 Hz is filtered out and transmitted to the VDSL2 port of the user-end modem.
  • the end of the high-pass filter and the low-pass filter in the user-side first splitter connected to the user-side second splitter is referred to as the mixed-signal port of the user-side first splitter.
  • the structure of the second splitter at the office end and the second splitter of the client end are the same; the structure of the first splitter at the central end and the first splitter at the user end are the same. That is, the two splitters at the user side can also achieve signal coupling, and the two splitters at the local end can also achieve signal separation.

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Abstract

本发明提供了一种G.fast信号、VDSL2信号和话音信号在铜线中的频分复用传输方法，包括：A、选取G.fast信号、VDSL2信号和话音信号中频段相邻两信号进行一次滤波、耦合，形成第一混合信号和未被选取的一单独信号；B、将所述混合信号和所述单独信号进行二次滤波、耦合，形成第二混合信号在铜线中传输。对应还提供一种上述信号的频分复用传输装置，基于G.fast信号、VDSL2信号和话音信号的宽带频段差异，将三种信号进行先后两次滤波、耦合，保证各信号均是频段没有重叠且不互相影响。由此，解决了G.fast技术直接接入现有VDSL2宽带网络造成二者相互干扰的问题，满足了VDSL2用户增加铜线宽带接入速率的需求。

Description

G.fast信号、VDSL2信号和话音信号在铜线中的频分复用传输方法及装置 技术领域
本发明涉及网络通信技术领域，特别是一种G.fast信号、VDSL2信号和话音信号在铜线中的频分复用传输方法及装置。
背景技术
传统铜线网络以语音业务为主，早期的数据业务通过音频拨号Modem和ISDN方式提供，其有限的接入速率很难满足日益增长的数据业务带宽的需求。随着ADSL、VDSL2等技术的普及应用，接入速率从kbps进一步提升至Mbps。前文所述ADSL是非对称数字用户线路。采用频分复用技术把普通的电话线分成了电话、上行数据和下行数据三个相对独立的信道，从而避免了相互之间的干扰。用户可以边打电话边上网，不用担心上网速率和通话质量下降的情况。而VDSL2是超高速数字用户线路。从技术角度而言，VDSL2实际上可视作ADSL的升级，其平均传输速率可比ADSL高出5至10倍。
宽带接入所能提供的网络服务也从最早的电子公告牌系统(BBS)、网页浏览等低带宽应用，发展到语音通话、视频通话、高清电视、虚拟现实等等高带宽应用。
随着OTT(Over‐The‐Top)视频、4K电视、智慧家庭、未来云业务时代等新兴业务的兴起，超宽带网络建设步伐正在加快。针对新建小区，通常采用光纤到户(FTTH，Fiber To The Home)的方式。但针对成熟小区，光纤改造因涉及穿墙布线等复杂工程，建设进展慢。于是运营商考虑如何将光纤下移到楼道内或者家门口，最后一小段再利用原有的接入介质(尤其是传统铜线)提供超高速宽带接入。由于接 入距离短，运营商希望接入速率达到千兆。作为FTTH的替代方案，G.fast应运而生。G.fast是国际电信联盟(ITU)的一个标准化建议，目的是在不超过250m长度的铜线上达到光纤的速度，即超过1Gpbs。G.fast的高频段初始阶段会采用106MHz，未来可扩展到212MHz。
G.fast信号可以重用成熟小区已有铜线资源，利用更宽的频谱资源，在传统铜线上提供最高达1Gpbs的匹敌光纤的高带宽接入，实现更快接入、更快部署、更快收益。
如图5所示，话音信号的宽带频段为0Hz～f 1Hz，VDSL2信号的宽带频段为f 1Hz～f 3Hz。VDSL2信号占用的频段宽度有限，铜线宽带接入速率不足以满足超级应用的需要。如图6所示为G.fast宽带频段示意图，G.fast信号的宽带频段为f 2Hz～f 4Hz，其中f 1＜f 2＜f 3＜f 4。随着G.fast信号将频段宽度的进一步拓展，铜线宽带接入速率已迈进Gpbs时代，为更多超级应用提供了广阔的空间。但对比图5和图6不难发现，VDSL2信号与G.fast信号使用的频段有一部分是重叠的，直接将G.fast信号接入现有VDSL2信号铜线宽带环境势必会造成二者相互干扰而导致无法使用。
发明内容
本发明的主要目的在于提供一种G.fast信号、VDSL2信号和话音信号在铜线中的频分复用传输方法及装置，采用频分滤波技术克服现有技术中的缺陷。
所述G.fast信号、VDSL2信号和话音信号在铜线中的频分复用传输的方法，包括步骤：
A、选取G.fast信号、VDSL2信号和话音信号中频段相邻的两信号进行一次耦合，形成第一混合信号和未被选取的一单独信号；
该一次耦合中，将形成第一混合信号的该两信号中的高频段的信号进行高通滤波，另一信号进行低通滤波，然后复用到该第一混合信号所占频段；
B、将所述混合信号和所述单独信号这两信号进行二次耦合，形 成第二混合信号在铜线中传输；
该二次耦合中，将形成第二混合信号的该两信号中的高频段的信号进行高通滤波，另一信号进行低通滤波，然后复用到该第二混合信号所占频段。
由上，基于G.fast信号、VDSL2信号和话音信号的宽带频段差异，将三种信号进行先后两次耦合，保证各信号均是频段没有重叠的且不互相影响的。由此，解决了G.fast技术直接接入现有VDSL2宽带网络造成二者相互干扰的问题，满足了VDSL2用户增加铜线宽带接入速率的需求。
其中，步骤A中，所述相邻的两信号包括VDSL2信号和话音信号；
所述高通滤波和所述低通滤波以所述话音信号宽带频段的频率上限f 1Hz为节点，分别过滤出所述VDSL2信号和所述话音信号；
步骤B中，所述高通滤波和所述低通滤波以所述G.fast信号宽带频段的频率下限f 2Hz至所述VDSL2信号宽带频段的频率上限f 3Hz所在范围内的任一频率为节点，高通滤波滤除f 2Hz至该节点频段的G.fast信号，保留该节点至f 4Hz频段的G.fast信号；
低通滤波过滤除高于所述节点频段的所述混合信号，保留低于所述节点的的所述混合信号；
其中，f 1Hz＜f 2Hz＜f 3Hz＜f 4Hz。
由上，以所述G.fast信号宽带频段的频率下限f 2Hz至所述VDSL2信号宽带频段的频率上限f 3Hz所在范围内的任一频率为节点，将高于该节点的G.fast信号耦合或分离。由于G.fast技术所需传输的距离仅为一公里左右，因此可以利用铜线中更高的频段进行传输。基于此，即便将G.fast信号与VDSL2信号相重合的低频部分滤除，也不会影响G.fast信号的传输速度。解决了G.fast技术直接接入现有VDSL2信号铜线造成二者相互干扰的问题，满足了VDSL2用户增加铜线宽带接入速率的需求。
其中，步骤B中，所述高通滤波和所述低通滤波以所述VDSL2信号宽带频段的频率上限f 3Hz为节点，高通滤波滤除低于f 3Hz频段的 G.fast信号，保留f 3Hz至f 4Hz频段的G.fast信号；
低通滤波保留低于f 3Hz频段的所述混合信号。
由上，以所述f 3Hz为节点，在保留VDSL2信号全部频段的情况下，滤除G.fast信号的低频部分，一方面保证使用VDSL2信号用户的需求，充分利用VDSL2用户的现有资源；另一方面滤除G.fast信号的低频部分也基本不会对其传输产生负面影响，一举两得。
其中，步骤A中，所述相邻的两信号包括G.fast信号和VDSL2信号；
所述高通滤波和所述低通滤波以所述G.fast信号宽带频段的频率下限f 2Hz至所述VDSL2信号宽带频段的频率上限f 3Hz所在范围内的任一频率为节点，高通滤波滤除f 2Hz至该节点频段的G.fast信号，保留该节点至f 4Hz频段的G.fast信号；
低通滤波过滤除该节点至f 3Hz频段的VDSL2信号，保留f 1Hz～该节点的所述VDSL2信号；
步骤B中，所述高通滤波和所述低通滤波以所述话音信号宽带频段的频率上限f 1Hz为节点，分别过滤出所述混合信号和所述话音信号；
其中，f 1Hz＜f 2Hz＜f 3Hz＜f 4Hz。
由上，以所述G.fast信号宽带频段的频率下限f 2Hz至所述VDSL2信号宽带频段的频率上限f 3Hz所在范围内的任一频率为节点，将高于该节点的G.fast信号耦合或分离。由于G.fast技术所需传输的距离仅为一公里左右，因此可以利用铜线中更高的频段进行传输。基于此，即便将G.fast信号与VDSL2信号相重合的低频部分滤除，也不会影响G.fast信号的传输速度。解决了G.fast技术直接接入现有VDSL2信号铜线造成二者由于频段重叠造成的相互干扰的问题，话音信号、VDSL2信号和滤波后的G.fast信号在频段上没有重叠，可以实现频分复用，满足了VDSL2用户增加铜线宽带接入速率的需求。
步骤A中，所述高通滤波和所述低通滤波以所述VDSL2信号宽带频段的频率上限f 3Hz为节点，高通滤波滤除f 2Hz至f 3Hz频段的G.fast 信号，保留f 3Hz至f 4Hz频段的G.fast信号；
低通滤波保留f 1Hz至f 3Hz频段的VDSL2信号。
由上，以所述f 3Hz为节点，使话音信号、VDSL2信号和滤波后的G.fast信号在频段上没有重叠，可以实现频分复用，满足了VDSL2用户增加铜线宽带接入速率的需求。
另外，本申请对应还提供一种G.fast信号、VDSL2信号和话音信号在铜线中的复用传输装置，包括：
第一分离器，用于将所选取的G.fast信号、VDSL2信号和话音信号中频段相邻的两信号进行一次耦合，形成第一混合信号和未被选取的一单独信号；
所述一次耦合包括将形成第一混合信号的该两信号中的高频段的信号进行高通滤波，另一信号进行低通滤波，然后复用到该第一混合信号所占频段；
第二分离器，与所述第一分离器连接，将所述混合信号和所述单独信号这两信号进行二次耦合，形成第二混合信号在铜线中传输；
所述二次耦合包括将形成第二混合信号的该两信号中的高频段的信号进行高通滤波，另一信号进行低通滤波，然后复用到该第二混合信号所占频段。
由上，话音信号、VDSL2信号和滤波后的G.fast信号在频段上没有重叠，可以实现频分复用。解决了G.fast技术直接接入现有VDSL2信号铜线造成二者相互干扰的问题，满足了VDSL2用户增加铜线宽带接入速率的需求。
其中，
所述第一分离器包括高通滤波器和低通滤波器；
所述第一分离器的高通滤波器一端连接于传输VDSL2信号的设备，所述第一分离器的低通滤波器一端连接于传输话音信号的设备；所述第一分离器的高通滤波器的另一端和所述低通滤波器的另一端分别连接于一混合信号端口；
所述第二分离器包括高通滤波器和低通滤波器；
所述第二分离器的高通滤波器一端连接于传输G.fast信号的设备，另一端连接于铜线；
所述第二分离器的低通滤波器一端连接于所述混合信号端口，另一端连接于所述铜线。
由上，基于G.fast信号、VDSL2信号和话音信号的宽带频段差异，利用分离器中高通、低通滤波器的双向导通特性将三种信号进行先后两次耦合，保证各信号均是相对干净的且不互相影响的。由此，解决了G.fast技术直接接入现有VDSL2信号铜线造成二者相互干扰的问题，满足了VDSL2用户增加铜线宽带接入速率的需求。
其中，
所述第一分离器包括高通滤波器和低通滤波器；
所述第一分离器的高通滤波器一端连接于传输G.fast信号的设备，所述第一分离器的低通滤波器一端连接于传输VDSL2信号的设备；
所述第一分离器的高通滤波器的另一端和所述低通滤波器的另一端分别连接于一混合信号端口；
所述第二分离器包括高通滤波器和低通滤波器；
所述第二分离器的高通滤波器一端连接于所述混合信号端口，另一端连接于所述铜线；
所述第二分离器的低通滤波器一端连接于传输话音信号的设备，另一端连接于所述铜线。
由上，基于G.fast信号、VDSL2信号和话音信号的宽带频段差异，利用分离器中高通、低通滤波器的双向导通特性将三种信号进行先后两次耦合，保证各信号均是频段没有重叠且不互相影响的。由此，解决了G.fast技术直接接入现有VDSL2信号铜线造成二者相互干扰的问题，满足了VDSL2用户增加铜线宽带接入速率的需求。
附图说明
图1为G.fast、VDSL2和话音信号在铜线中的频分复用传输方法 流程图；
图2为G.fast、VDSL2和话音信号在铜线中的频分复用传输装置第一实施例示意图；
图3为G.fast、VDSL2和话音信号在铜线中的频分复用传输装置第二实施例示意图；
图4为G.fast、VDSL2和话音信号在铜线中频分复用传输的宽带频段示意图；
图5为现有技术中VDSL2和话音信号在铜线中的宽带频段示意图
图6为现有技术中G.fast和话音信号在铜线中的宽带频段示意图。
具体实施方式
下面参见图1～图4对本发明所述的G.fast信号、VDSL2信号和话音信号在铜线中的复用传输方法及装置进行详细说明。
如图1所示，G.fast信号、VDSL2信号和话音信号在铜线中的频分复用传输方法包括以下步骤：
S100：在局端将G.fast信号、VDSL2信号和话音信号进行一次耦合，形成一组混合信号和一组单独信号。
所述局端指提供终端接入的一方，一般包括交换机或数据节点机。如图2所示，局端的中央传输单元用于传输VDSL2信号和G.fast信号，对应图2中分别所示ATU‐C/VDSL2和ATU‐C/G.fast，作为非对称数字用户环线组成部分的电话总机调制解调器。局端的电话交换设备传输话音信号。
基于背景技术所述，话音信号的宽带频段为0Hz～f 1Hz，VDSL2信号的宽带频段为f 1Hz～f 3Hz，G.fast信号的宽带频段为f 2Hz～f 4Hz，f 1＜f 2＜f 3＜f 4，其中f 1为4KH，f 2为1MHz，f 3为17MHz，f 4为216MHz。
设置局端第一分离器，所述局端第一分离器内包括一高通滤波器和一低通滤波器。高通滤波器的两端分别连接ATU‐C/VDSL2和后文所述局端第二分离器中的低通滤波器端口；低通滤波器的两端分别连接所述电话交换设备和所述局端第二分离器中的低通滤波器端口。局端 第一分离器中高通滤波器和低通滤波器连接第二分离器的端口称为混合信号端口。
结合图5所示，局端第一分离器的两滤波器以话音信号宽带频段的频率上限f 1Hz为节点，分别进行高通、低通滤波，从而分别过滤出话音信号和VDSL2信号。局端第一分离器将所述话音信号和所述VDSL2信号耦合，形成一组混合信号。
S200：在局端将混合信号和单独信号进行二次耦合，形成G.fast、VDSL2和话音信号的混合信号传输至网络铜线。
设置局端第二分离器，所述局端第二分离器内同样包括一高通滤波器和一低通滤波器。高通滤波器的两端分别连接ATU‐C/G.fast和网络铜线，所述网络铜线即为电话线，用于连接局端和后文所述用户端；低通滤波器的两端分别连接所述局端第一分离器的混合信号端口和所述网络铜线。
结合图5和图6所示，局端第二分离器的两滤波器以VDSL2信号宽带频段的频率上限f 3Hz为节点，对ATU‐C/G.fast传输的G.fast信号和步骤S100中局端第一分离器所传输的话音信号和VDSL2信号的混合信号分别进行高通、低通滤波，从而分别过滤出G.fast信号和所述混合信号。局端第二分离器将所述混合信号和ATU‐C/G.fast传输的G.fast信号耦合在所述网络铜线中，形成如图4所示的G.fast信号、VDSL2信号和话音的混合信号，通过网络铜线传输到用户端。
本实施例中是以VDSL2信号宽带频段的频率上限f 3Hz为节点，实际使用中并不限于此，结合图5、图6所示，以所述G.fast信号宽带频段的频率下限f 2Hz至所述VDSL2信号宽带频段的频率上限f 3Hz所在范围内的任一频率为节点，对ATU‐C/G.fast传输的G.fast信号和步骤S100中局端第一分离器所传输的话音信号和VDSL2信号的混合信号分别进行高通、低通滤波，从而分别过滤出G.fast信号和所述混合信号。即高通滤波滤除f 2Hz至该节点频段的G.fast信号，保留该节点至f 4Hz频段的G.fast信号；低通滤波过滤除高于所述节点频段的所述混合信号，保留低于所述节点的的所述混合信号。
S300：在用户端，将G.fast信号、VDSL2信号和话音的混合信号进行一次分离，分离为一组单独信号和一组混合信号。
所述用户端与所述局端相对应。设置有用户端第二分离器，其内部包括一高通滤波器和一低通滤波器。高通滤波器的两端分别连接所述网络铜线和用户端G.fast调制解调器，对应图2所示为ATU‐R/G.fast；低通滤波器的两端分别连接所述网络铜线和后文所述用户端第一分离器中的混合信号端口。
用户端第二分离器中的两滤波器以VDSL2信号宽带频段的上限f 3Hz为节点，对G.fast信号、VDSL2信号和话音信号的混合信号进行高通、低通滤波，分离出单独的G.fast信号，以及包括VDSL2信号和话音信号的混合信号。
S400：在用户端，将步骤S300中的混合信号进行二次分离，分离出两组单独信号。
设置用户端第一分离器，所述用户端第一分离器内同样包括一高通滤波器和一低通滤波器。所述高通滤波器的两端分别连接用户端第二分离器的低通滤波器端口和所述用户端VDSL2调制解调器，对应图2所示为ATU‐R/VDSL2；低通滤波器的两端分别连接所述用户端第二分离器的低通滤波器端口和电话机。用户端第一分离器中高通滤波器、低通滤波器与第二分离器的连接端称为第一分离器的混合信号端口。
所述两滤波器以话音信号的宽带频段的上限f 1Hz为节点，对VDSL2信号和话音信号的混合信号进行高通、低通滤波。从而分离出VDSL2信号和话音信号。
上述步骤是以由局端输出，用户端接收为例进行说明。由于上述局端分离器和用户端分离器中的滤波器在其通带频率范围内是双向导通的，即信号可以从任何一端传输至另一端。自然不难理解，还包括由用户端输出，局端接收的实施例。即用户端的用户端第二分离器将VDSL2信号和话音信号进行耦合形成混合信号，用户端第一分离器再将G.fast信号和前述混合信号耦合以形成G.fast信号、VDSL2信号 和话音信号的混合信号。在局端，局端第二分离器将成G.fast信号、VDSL2信号和话音信号的混合信号分离出G.fast信号和由VDSL2信号和话音信号组成的混合信号，局端第一分离器再将VDSL2信号和话音信号组成的混合信号分离成VDSL2信号、话音信号。
上述局端第一分离器和用户端第一分离器是以VDSL2的宽带频段的上限f 3Hz为节点，滤除低于f 3Hz频段的G.fast信号。由于G.fast技术所需传输的距离仅为一公里左右(距离较短)，因此可以利用铜线中更高的频段进行传输。基于此，即便将G.fast信号与VDSL2信号相重合的低频部分滤除(对应过滤掉G.fast信号宽带频段为f 2Hz～f 3Hz)，也不会影响G.fast信号的传输速度。
通过上述技术方案，使话音信号、VDSL2信号和G.fast信号可以同时在铜线网络中传输而不相互干扰，构成如图4所示的三频段频分复用，解决了G.fast技术直接接入现有VDSL2信号铜线造成二者相互干扰的问题，满足了VDSL2用户增加铜线宽带接入速率的需求。
另外，本发明还提供了G.fast信号、VDSL2信号和话音信号在铜线中的频分复用传输方法的第二实施例，结合图3所示，包括以下步骤：
S100：在局端将G.fast信号、VDSL2信号和话音信号进行一次耦合，形成一组混合信号和一组单独信号。
设置局端第一分离器，所述局端第一分离器内包括一高通滤波器和一低通滤波器。高通滤波器的两端分别连接局端ATU‐C/G.fast和后文所述局端第二分离器中的高通滤波器端口；低通滤波器的两端分别连接局端ATU‐C/VDSL2和所述局端第二分离器中的高通滤波器端口。局端第一分离器中高通滤波器和低通滤波器与后文所述局端第二分离器的连接端称为混合信号端口。
结合图5、图6所示，局端第一分离器的两滤波器以VDSL2宽带频段的频率上限f 3Hz为节点，分别进行高通、低通滤波，从而分别过滤出VDSL2信号和G.fast信号。局端第一分离器将ATU‐C/VDSL2传输 的VDSL2信号和ATU‐C/G.fast传输的G.fast信号耦合形成一组混合信号。
本实施例中是以VDSL2信号宽带频段的频率上限f 3Hz为节点，实际使用中并不限于此，结合图5、图6所示，以所述G.fast信号宽带频段的频率下限f 2Hz至所述VDSL2信号宽带频段的频率上限f 3Hz所在范围内的任一频率为节点，对ATU‐C/G.fast传输的G.fast信号和ATU‐C/VDSL2传输的VDSL2信号分别进行高通、低通滤波，从而分别过滤出G.fast信号和VDSL2信号。即高通滤波滤除f 2Hz至该节点频段的G.fast信号，保留该节点至f 4Hz频段的G.fast信号；低通滤波过滤除该节点至f 3Hz频段的VDSL2信号，保留f 1Hz～该节点的所述VDSL2信号。
S200：在局端将混合信号和单独信号进行二次耦合，形成G.fast、VDSL2和话音的混合信号传输至铜线。
设置局端第二分离器，所述局端第二分离器内同样包括一高通滤波器和一低通滤波器。高通滤波器的两端分别连接所述局端第一分离器的混合信号端口和网络铜线，所述网络铜线即为电话线，用于连接局端和所述用户端；低通滤波器的两端分别连接电话交换设备和所述网络铜线。
结合图5和图6所示，局端第二分离器的两滤波器以话音信号宽带频段的频率上限f 1Hz为节点，对电话交换设备传输的话音信号和步骤S100中局端第一分离器所传输的G.fast信号和VDSL2信号的混合信号分别进行高通、低通滤波，从而分别过滤出话音信号和所述混合信号。局端第二分离器将所述话音信号和混合信号耦合在所述网络铜线中，形成如图4所示的G.fast信号、VDSL2信号和话音的混合信号，通过网络铜线传输到用户端。
S300：在用户端，将G.fast、VDSL2和话音的混合信号进行一次分离，分离为一组单独信号和一组混合信号。
设置有用户端第二分离器，其内部包括一高通滤波器和一低通滤波器。高通滤波器的两端分别连接所述网络铜线和用户端第一分离器 的混合信号端口；低通滤波器的两端分别连接所述网络铜线和电话机。
用户端第二分离器中的两滤波器以话音信号宽带频段的频率上限f 1Hz为节点，对G.fast信号、VDSL2信号和话音信号的混合信号进行高通、低通滤波，分离为单独的话音信号，以及包括G.fast信号和VDSL2信号的混合信号。
S400：在用户端，将步骤S300中的混合信号进行二次分离，分离为两组单独信号。
设置用户端第一分离器，所述用户端第一分离器内同样包括一高通滤波器和一低通滤波器。所述高通滤波器的两端分别连接所述用户端第二分离器的高通滤波器端口和所述用户端G.fast调制解调器ATU‐R/G.fast；低通滤波器的两端分别连接所述用户端第二分离器的高通滤波器端口和用户端VDSL2调制解调器ATU‐R/VDSL2。用户端第一分离器的高通滤波器和低通滤波器与用户端第二分离器连接的一端称为用户端第一分离器的混合信号端口。
所述两滤波器以VDSL2信号宽带频段的频率上限f 3Hz为节点，对VDSL2信号和G.fast信号的混合信号进行高通、低通滤波。从而分离出VDSL2信号和G.fast信号。
与第一实施例同理，第二实施例也是以由局端输出，用户端接收为例进行说明。不难理解，还包括由用户端输出，局端接收的情况，在此不再赘述。本实施例与第一实施例解决的技术问题相同，均是滤除G.fast信号的低频端区域与VDSL2高频段区域相重叠的部分，使话音信号、VDSL2信号和G.fast信号可以同时在铜线网络中传输，而不相互干扰。
对应的，本发明还提供一种G.fast、VDSL2和话音信号在铜线中的频分复用传输装置，包括通过网络铜线连接的局端和用户端。
如图2所示为所述频分复用传输装置第一实施例的原理示意图，局端包括：
中央传输单元，图2中所示ATU‐C/VDSL2和ATU‐C/G.fast，分别用于传输VDSL2信号和G.fast信号。
电话交换设备，用于传输话音信号。
所述频分复用传输装置包括局端第一分离器和局端第二分离器。
其中，局端第一分离器包括一高通滤波器和一低通滤波器。
局端第一分离器中的所述高通滤波器的两端分别连接所述ATU‐C/VDSL2和局端第二分离器中的低通滤波器端口，以话音信号宽带频段的频率上限f 1Hz为节点，过滤出大于f 1Hz的VDSL2信号；
局端第一分离器中的所述低通滤波器的两端分别连接所述电话交换设备和所述局端第二分离器中的低通滤波器端口，以话音信号宽带频段的频率上限f 1Hz为节点，过滤出小于f 1Hz的话音信号。
局端第一分离器中的所述高通滤波器、低通滤波器与所述局端第二分离器中的低通滤波器连接的一端为混合信号端口，实现将过滤出的VDSL2信号和话音信号进行耦合，形成VDSL2信号和话音信号的混合信号。
局端第二分离器包括一高通滤波器和一低通滤波器。
局端第二分离器中的所述高通滤波器的两端分别连接中央传输单元的G.fast端口和网络铜线，以VDSL2信号宽带频段的频率上限f 3Hz为节点，过滤出大于f 3Hz的G.fast信号；
所述网络铜线即为电话线，用于连接局端和后文所述用户端；
局端第二分离器中的低通滤波器的两端分别连接所述局端第一分离器的混合信号端口和所述网络铜线，以VDSL2信号宽带频段的频率上限f 3Hz为节点，过滤出小于f 3Hz的VDSL2信号和话音信号的混合信号。
局端第二分离器中的所述高通滤波器与所述网络铜线的连接端和低通滤波器与所述网络铜线的连接端相连接，从而实现将过滤出的VDSL2信号和话音信号的混合信号，以及G.fast信号进行耦合，形成G.fast信号、VDSL2信号和话音信号的混合信号。
本实施例中局端第二分离器中是以VDSL2信号宽带频段的频率 上限f 3Hz为节点，实际使用中并不限于此，结合图5、图6所示，以所述G.fast信号宽带频段的频率下限f 2Hz至所述VDSL2信号宽带频段的频率上限f 3Hz所在范围内的任一频率为节点，对ATU‐C/G.fast传输的G.fast信号和步骤S100中局端第一分离器所传输的话音信号和VDSL2信号的混合信号分别进行高通、低通滤波，从而分别过滤出G.fast信号和所述混合信号。即高通滤波滤除f 2Hz至该节点频段的G.fast信号，保留该节点至f 4Hz频段的G.fast信号；低通滤波过滤除高于所述节点频段的所述混合信号，保留低于所述节点的的所述混合信号。
所述频分复用传输装置还包括用户端第二分离器和用户端第一分离器。
其中，用户端第二分离器包括一高通滤波器和一低通滤波器。
用户端第二分离器中的高通滤波器的两端分别连接所述网络铜线和用户端G.fast调制解调器，图2中所示为ATU‐R/G.fast，以VDSL2信号宽带频段的频率上限f 3Hz为节点，过滤出大于f 3Hz的G.fast信号，传输至ATU‐R/G.fast；
用户端第二分离器中的低通滤波器的两端分别连接所述网络铜线和用户端第一分离器的混合信号端口，以VDSL2信号宽带频段的频率上限f 3Hz为节点，过滤出小于f 3Hz的G.fast信号，传输至用户端第一分离器的混合信号端口；
用户端第一分离器，包括一高通滤波器和一低通滤波器。
用户端第一分离器中的高通滤波器的两端分别连接所述用户端第二分离器中的低通滤波器端口和所述用户端VDSL2调制解调器，图2中所示为ATU‐R/VDSL2，以话音信号宽带频段的频率上限f 1Hz为节点，过滤出大于f 1Hz的VDSL2信号，传输至ATU‐R/VDSL2；
用户端第一分离器中的低通滤波器的两端分别连接所述用户端第二分离器中的低通滤波器端口和电话机，以话音信号宽带频段的频率上限f 1Hz为节点，过滤出小于f 1Hz的话音信号，传输至电话机。
在上述实施例中，所述局端第二分离器和所述用户端第二分离器 结构相同；所述局端第一分离器和所述用户端第一分离器结构相同。即在用户端的两分离器同样可以实现信号的耦合，在局端的两分离器亦可实现信号的分离。
如图3所示为所述频分复用传输装置第二实施例的原理示意图，局端包括：
中央传输单元，图3中所示ATU‐C/VDSL2和ATU‐C/G.fast，分别用于传输VDSL2信号和G.fast信号。
电话交换设备，用于传输话音信号。
所述频分复用传输装置包括局端第一分离器和局端第二分离器。
其中，局端第一分离器包括一高通滤波器和一低通滤波器。
局端第一分离器中的所述高通滤波器的两端分别连接ATU‐C/G.fast和局端第二分离器中的高通滤波器端口，以VDSL2信号宽带频段的频率上限f 3Hz为节点，过滤出大于f 3Hz的G.fast信号；
局端第一分离器中的所述低通滤波器的两端分别连接所述ATU‐C/VDSL2和所述局端第二分离器中的高通滤波器端口，以VDSL2信号宽带频段的频率上限f 3Hz为节点，过滤出小于f 3Hz的VDSL2信号。
局端第一分离器中的所述高通滤波器和低通滤波器与所述局端第二分离器中的高通滤波器连接端称为混合信号端口，实现将过滤出的G.fast信号和VDSL2信号进行耦合，形成G.fast信号和VDSL2的信号混合信号。
本实施例中局端第一分离器是以VDSL2信号宽带频段的频率上限f 3Hz为节点，实际使用中并不限于此，结合图5、图6所示，以所述G.fast信号宽带频段的频率下限f 2Hz至所述VDSL2信号宽带频段的频率上限f 3Hz所在范围内的任一频率为节点，对ATU‐C/G.fast传输的G.fast信号和ATU‐C/VDSL2传输的VDSL2信号分别进行高通、低通滤波，从而分别过滤出G.fast信号和VDSL2信号。即高通滤波滤除f 2Hz至该节点频段的G.fast信号，保留该节点至f 4Hz频段的G.fast信号； 低通滤波过滤除该节点至f 3Hz频段的VDSL2信号，保留f 1Hz～该节点的所述VDSL2信号。
局端第二分离器，包括一高通滤波器和一低通滤波器。
局端第二分离器中的所述高通滤波器的两端分别连接所述局端第一分离器的混合信号端口和网络铜线，以话音信号宽带频段的频率上限f 1Hz为节点，过滤出大于f 1Hz的G.fast信号和VDSL2信号的混合信号；所述网络铜线即为电话线，用于连接局端和后文所述用户端；
局端第二分离器中的低通滤波器的两端分别连接所述电话交换设备和所述网络铜线，以话音信号宽带频段的频率上限f 1Hz为节点，过滤出小于f 1Hz的话音信号。
局端第二分离器中的所述高通滤波器与所述网络铜线的连接端和低通滤波器与所述网络铜线的连接端相连接，实现将过滤出的话音信号与G.fast信号和VDSL2信号的混合信号进行耦合，形成G.fast信号、VDSL2信号和话音信号的混合信号。
所述频分复用传输装置还包括用户端第二分离器和用户端第一分离器。
用户端第二分离器包括一高通滤波器和一低通滤波器。
用户端第二分离器中的高通滤波器的两端分别连接所述网络铜线和用户端第一分离器的混合信号端口，以话音信号宽带频段的频率上限f 1Hz为节点，过滤出大于f 1Hz的G.fast信号和VDSL2的混合信号，传输至用户端第一分离器的混合信号端口；
用户端第二分离器中的低通滤波器的两端分别连接所述用户端第一分离器的混合信号端口和电话机，以话音信号宽带频段的频率上限f 1Hz为节点，过滤出小于f 1Hz的话音信号，传输至电话机；
用户端第一分离器，包括一高通滤波器和一低通滤波器。
用户端第一分离器中的高通滤波器的两端分别连接所述用户端第二分离器的高通滤波器端口和所述用户端G.fast调制解调器，图3中所示为ATU‐R/G.fast，以VDSL2信号宽带频段的频率上限f 3Hz为节点，过滤出大于f 3Hz的G.fast信号，传输至ATU‐R/G.fast用户端调制 解调器的G.fast端口；
用户端第一分离器中的低通滤波器的两端分别连接所述用户端第二分离器的高通滤波器端口和所述用户端VDSL2调制解调器，图3中所示为ATU‐R/VDSL2，以VDSL2信号宽带频段的频率上限f 3Hz为节点，过滤出小于f 3Hz的VDSL2信号，传输至用户端调制解调器的VDSL2端口。
所述用户端第一分离器中的高通滤波器和低通滤波器与用户端第二分离器连接的一端称为用户端第一分离器的混合信号端口。
同理，在上述实施例中，所述局端第二分离器和所述用户端第二分离器结构相同；所述局端第一分离器和所述用户端第一分离器结构相同。即在用户端的两分离器同样可以实现信号的耦合，在局端的两分离器亦可实现信号的分离。
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种G.fast信号、VDSL2信号和话音信号在铜线中的频分复用传输方法，其特征在于，包括步骤
    A、选取G.fast信号、VDSL2信号和话音信号中频段相邻的两信号进行一次耦合，形成第一混合信号和未被选取的一单独信号；
    该一次耦合中，将形成第一混合信号的该两信号中的高频段的信号进行高通滤波，另一信号进行低通滤波，然后复用到该第一混合信号所占频段；
    B、将所述混合信号和所述单独信号这两信号进行二次耦合，形成第二混合信号在铜线中传输；
    该二次耦合中，将形成第二混合信号的该两信号中的高频段的信号进行高通滤波，另一信号进行低通滤波，然后复用到该第二混合信号所占频段。
  2. 根据权利要求1所述的方法，其特征在于，
    步骤A中，所述相邻的两信号包括VDSL2信号和话音信号；
    所述高通滤波和所述低通滤波以所述话音信号宽带频段的频率上限f 1Hz为节点，分别过滤出所述VDSL2信号和所述话音信号；
    步骤B中，所述高通滤波和所述低通滤波以所述G.fast信号宽带频段的频率下限f 2Hz至所述VDSL2信号宽带频段的频率上限f 3Hz所在范围内的任一频率为节点，高通滤波滤除f 2Hz至该节点频段的G.fast信号，保留该节点至f 4Hz频段的G.fast信号；
    低通滤波过滤除高于所述节点频段的所述混合信号，保留低于所述节点的所述混合信号；
    其中，f 1Hz＜f 2Hz＜f 3Hz＜f 4Hz。
  3. 根据权利要求2所述的方法，其特征在于，
    步骤B中，所述高通滤波和所述低通滤波以所述VDSL2信号宽带频段的频率上限f 3Hz为节点，高通滤波滤除f 2Hz至f 3Hz频段的G.fast信号，保留f 3Hz至f 4Hz频段的G.fast信号；
    低通滤波保留低于f 3Hz频段的所述混合信号。
  4. 根据权利要求1所述的方法，其特征在于，
    步骤A中，所述相邻的两信号包括G.fast信号和VDSL2信号；
    所述高通滤波和所述低通滤波以所述G.fast信号宽带频段的频率下限f 2Hz至所述VDSL2信号宽带频段的频率上限f 3Hz所在范围内的任一频率为节点，高通滤波滤除f 2Hz至该节点频段的G.fast信号，保留该节点至f 4Hz频段的G.fast信号；
    低通滤波过滤除该节点至f 3Hz频段的VDSL2信号，保留f 1Hz～该节点的所述VDSL2信号；
    步骤B中，所述高通滤波和所述低通滤波以所述话音信号宽带频段的频率上限f 1Hz为节点，分别过滤出所述混合信号和所述话音信号；
    其中，f 1Hz＜f 2Hz＜f 3Hz＜f 4Hz。
  5. 根据权利要求4所述的方法，其特征在于，步骤A中，所述高通滤波和所述低通滤波以所述VDSL2信号宽带频段的频率上限f 3Hz为节点，高通滤波滤除f 2Hz至f 3Hz频段的G.fast信号，保留f 3Hz至f 4Hz频段的G.fast信号；
    低通滤波保留f 1Hz至f 3Hz频段的VDSL2信号。
  6. 一种G.fast信号、VDSL2信号和话音信号在铜线中的频分复用传输装置，其特征在于，包括相互连接的第一分离器和第二分离器，
    第一分离器用于将所选取的G.fast信号、VDSL2信号和话音信号中频段相邻的两信号进行一次耦合，形成第一混合信号和未被选取的一单独信号；
    所述一次耦合包括将形成第一混合信号的该两信号中的高频段的信号进行高通滤波，另一信号进行低通滤波，然后复用到该第一混合信号所占频段；
    第二分离器与所述第一分离器连接，将所述混合信号和所述单独信号这两信号进行二次耦合，形成第二混合信号在铜线中传输；
    所述二次耦合包括将形成第二混合信号的该两信号中的高频段的信号进行高通滤波，另一信号进行低通滤波，然后复用到该第二混合信号所占频段。
  7. 根据权利要求6所述的装置，其特征在于，
    所述第一分离器包括高通滤波器和低通滤波器；
    所述第一分离器的高通滤波器一端连接于传输VDSL2信号的设备，所述第一分离器的低通滤波器一端连接于传输话音信号的设备；所述第一分离器的高通滤波器的另一端和所述低通滤波器的另一端分别连接于一混合信号端口；
    所述第一分离器的高通滤波器和低通滤波器以所述话音信号宽带频段的频率上限f 1Hz为节点，分别过滤出所述VDSL2信号和所述话音信号；
    所述第二分离器包括高通滤波器和低通滤波器；
    所述第二分离器的高通滤波器一端连接于传输G.fast信号的设备，另一端连接于铜线；
    所述第二分离器的低通滤波器一端连接于所述混合信号端口，另一端连接于所述铜线；
    所述第二分离器的高通滤波器和低通滤波器以所述G.fast信号宽带频段的频率下限f 2Hz至所述VDSL2信号宽带频段的频率上限f 3Hz所在范围内的任一频率为节点，高通滤波滤除f 2Hz至该节点频段的G.fast信号，保留该节点至f 4Hz频段的G.fast信号；
    低通滤波过滤除高于所述节点频段的所述混合信号，保留低于所述节点的的所述混合信号；
    其中，f 1Hz＜f 2Hz＜f 3Hz＜f 4Hz。
  8. 根据权利要求7所述的装置，其特征在于，
    所述第二分离器的高通滤波器和低通滤波器以所述VDSL2信号宽带频段的频率上限f 3Hz为节点，高通滤波器滤除f 2Hz至f 3Hz频段的G.fast信号，保留f 3Hz至f 4Hz频段的G.fast信号；
    低通滤波器保留低于f 3Hz频段的所述混合信号。
  9. 根据权利要求6所述的装置，其特征在于，包括相互连接的第一分离器和第二分离器，
    所述第一分离器包括高通滤波器和低通滤波器；
    所述第一分离器的高通滤波器一端连接于传输G.fast信号的设备，所述第一分离器的低通滤波器一端连接于传输VDSL2信号的设备；
    所述第一分离器的高通滤波器的另一端和所述低通滤波器的另一端分别连接于一混合信号端口；
    所述第一分离器的高通滤波器和低通滤波器以所述G.fast信号宽带频段的频率下限f 2Hz至所述VDSL2信号宽带频段的频率上限f 3Hz所在范围内的任一频率为节点，高通滤波器滤除f 2Hz至该节点频段的G.fast信号，保留该节点至f 4Hz频段的G.fast信号；
    低通滤波器过滤除该节点至f 3Hz频段的VDSL2信号，保留f 1Hz～该节点的所述VDSL2信号；
    所述第二分离器包括高通滤波器和低通滤波器；
    所述第二分离器的高通滤波器一端连接于所述混合信号端口，另一端连接于所述铜线；
    所述第二分离器的低通滤波器一端连接于传输话音信号的设备，另一端连接于所述铜线；
    所述第二分离器的高通滤波器和低通滤波以所述话音信号宽带频段的频率上限f 1Hz为节点，分别过滤出所述混合信号和所述话音信号。
  10. 根据权利要求9所述的装置，其特征在于，
    所述第一分离器的高通滤波器和低通滤波器以所述VDSL2信号宽带频段的频率上限f 3Hz为节点，高通滤波器滤除f 2Hz至f 3Hz频段的G.fast信号，保留f 3Hz至f 4Hz频段的G.fast信号；
    低通滤波器保留f 1Hz至f 3Hz频段的VDSL2信号。
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