Frequency division multiplexing transmission method and device of G. fast signal and VDSL2 signal and voice signal in copper wire
A technology of frequency division multiplexing and signaling, which is applied in the field of network communication, can solve problems such as inability to use, and achieve the effect of meeting the broadband access rate of copper wires
Pending Publication Date: 2018-11-06
BEIJING CORELOGIC COMM
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but contrast Figure 5 and Image 6 It is not difficult to find that some of the frequency bands used by VDSL2 signals and G.fast signals overlap. Directly connecting G.fast signals to the existing VDSL2 signal copper wire broadband environment will inevitably cause mutual interference between the two and make them unusable.
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[0059] see below Figure 1 ~ Figure 4 The multiplexing transmission method and device of the G.fast signal, VDSL2 signal and voice signal in the copper wire described in the present invention are described in detail.
[0060] like figure 1 As shown, the frequency division multiplexing transmission method of G.fast signal, VDSL2 signal and voice signal in copper wire comprises the following steps:
[0061] S100: Coupling the G.fast signal, VDSL2 signal and voice signal at the central office to form a group of mixed signals and a group of individual signals.
[0062] The central office refers to a party that provides terminal access, and generally includes a switch or a data node machine. like figure 2 As shown, the central transmission unit of the central office is used to transmit VDSL2 signals and G.fast signals, corresponding to figure 2 ATU-C / VDSL2 and ATU-C / G.fast are shown in ATU-C / VDSL2 and ATU-C / G.fast respectively, as a telephone switchboard modem that is an int...
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The invention provides a frequency division multiplexing transmission method of a G. fast signal and a VDSL2 signal and a voice signal in a copper wire. The method comprises the steps of A, selectingtwo signals with adjacent frequency bands in the G. fast signal, VDSL2 signal and voice signal to perform filtering and coupling for the first time, thus forming a first mixed signal and an unselectedsingle signal; and B, performing filtering and coupling on the mixed signal and the single signal for the second time, thus forming a second mixed signal to be transmitted in the copper wire. Correspondingly, the invention also provides a frequency division multiplexing transmission device for the abovementioned signal; the three kinds of signals are filtered and coupled for two times based on the broadband frequency band differences of the G. fast signal, VDSL2 signal and voice signal, so that the condition that the frequency band of each signal is not overlapped with one another and the signals are not mutually affected is ensured. Therefore, the problem that the G. fast technology directly accesses the existing VDSL2 broadband network and thus mutual interference therebetween is causedis solved, and the requirement of the VDSL2 user for increasing the access speed of the copper wire broadband is met.
Description
technical field [0001] The invention relates to the technical field of network communication, in particular to a frequency division multiplexing transmission method and device for G.fast signals, VDSL2 signals and voice signals in copper wires. Background technique [0002] The traditional copper wire network is mainly based on voice services, and the early data services are provided through audio dial-up Modem and ISDN. Its limited access rate is difficult to meet the growing demand for data service bandwidth. With the popularization and application of technologies such as ADSL and VDSL2, the access rate has been further increased from kbps to Mbps. ADSL mentioned above is an asymmetric digital subscriber line. Using frequency division multiplexing technology to divide the ordinary telephone line into three relatively independent channels of telephone, uplink data and downlink data, thus avoiding mutual interference. Users can surf the Internet while making calls, without...
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Login to View More IPC IPC(8): H04J1/02H04J1/04H04J1/12
CPCH04J1/02H04J1/045H04J1/12
Inventor 郭为民莫雨涵王强王季年王慧
Owner BEIJING CORELOGIC COMM