JP2018191211A - G. fast communication system, g. fast collecting device, g. fast home device, and g. fast communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to simultaneously use communication by G.fast with ISDN.SOLUTION: The G. fast communication system capable of coexisting with ISDN in a building having a plurality of homes, includes: a G. fast collecting device provided in the building; a G.fast in-home device installed at home; and middle wiring that is a metal wiring in a building and can be shared by the ISDN communication and the G.fast communication. The G. fast collecting device and the G.fast in-home device communicate with each other through G. fast via the middle wiring. A handshake tone has a frequency of 320 kHz or more.SELECTED DRAWING: Figure 1

Description

  The present invention relates to G.I. fast communication system, G.G. fast aggregation device, G.M. fast in-home device, and G. The present invention relates to a fast communication method.

  With the recent expansion of the use of the Internet, various high-speed digital communication techniques using conventional telephone lines for fixed telephones have already been proposed (for example, see Patent Document 1). Further, while the spread of optical fiber communication is progressing, it is practically reasonable to effectively use a communication infrastructure called a telephone line that has already been laid.

  For example, in an apartment house, after drawing optical fiber to the collective equipment (CO: Central Office) in the building, it is connected to the customer premises equipment (CPE: Customer Premises Equipment) of each house using metal wiring for existing fixed telephones. VDSL (Very High Speed Digital Subscriber Line) technology is used. In recent years, G.P. Fast (ITU-T G.9701) has attracted attention (see, for example, Non-Patent Document 1).

  On the other hand, with the progress of such high-speed communication, ISDN (Integrated Services Digital Network) is still used as an existing telephone line in addition to traditional analog telephone communication.

JP 2006-135416 A

"G.fast standardization trend" NTT Technology Journal May 2016

However, ISDN and G. When fast coexists, there are the following problems.
G. The fast communication apparatus has a handshake stage before this communication is performed. A handshake tone having a frequency defined by fast (G. 9701) is to be used. The frequency of this handshake tone includes “A43” and “B43”, and the following frequencies are respectively defined.

“A43”
Upstream: 38.8125 kHz, 73.3125 kHz, 107.8125 kHz
Down: 172.5kHz, 241.5kHz, 276kHz

“B43”
Upstream: 159.5625 kHz, 194.0625 kHz, 228.5625 kHz
Down: 310.5kHz, 379.5kHz, 414kHz

  On the other hand, as for ISDN, the frequency band of 0 to 320 kHz is used in Japan, and all the frequencies of “A43” and a part of the frequency of “B43” are included in the frequency band of ISDN. Fast handshake tones may interfere with ISDN communications. Therefore, ISDN and G.I. fast cannot be used at the same time. This hinders the introduction of fast.

  In view of this problem, the present invention provides G. The purpose is to enable communication by fast to coexist with ISDN and use them simultaneously.

(G.fast communication system)
According to one expression of the present invention, The fast communication system is a G.264 network that can coexist with ISDN in a building where a plurality of homes exist. A fast communication system comprising: a G.F. fast gathering apparatus and G. fast in-home device and metal wiring in the building, including ISDN communication and G. medium wiring that can be shared for fast communication, fast aggregation device and the G. Fast home devices are connected to each other via G. It communicates by fast and a handshake tone is a frequency of 320 kHz or more.

(G.fast assembly device)
In addition, G. The fast aggregation device is a G.D. that can coexist with ISDN in a building where a plurality of homes exist. fast aggregation device, G. G.F. installed in the house via a medium wiring that can be shared for fast communication and ISDN communication. fast in-home device and G.F. fast communication, and the G. The handshake tone with the fast in-home device has a frequency of 320 kHz or higher.

(G.fast home device)
In addition, G. The fast in-home device is a G.D. that can coexist with ISDN in a building where a plurality of homes exist. fast in-home device, The G.F. equipped in the building is connected via a medium wiring that can be shared by the communication of the fast and the communication of the ISDN. fast aggregation device and G. fast communication, and the G. The handshake tone with the fast aggregation device has a frequency of 320 kHz or more.

(G.fast communication method)
In addition, G. The fast communication method is a G.264 protocol used in combination with ISDN in a building where a plurality of homes exist. Fast communication method in which GDN is used in the building among the metal wiring used for communication with the station by ISDN. via a medium wire that can also be used for fast communication. fast aggregation device and G. Fast in-home devices perform handshaking with each other using a frequency of 320 kHz or higher for handshake tone, and after the handshake is established, G. This communication is performed with fast.

  According to the present invention, G.I. Fast communication can coexist with ISDN and be used simultaneously.

It is a figure which shows an example of the communication line connection between the office building of a telephone station, and an apartment house. G. fast aggregation device and G. It is a figure which shows the frequency band which a fast in-home apparatus uses by normal communication. It is a figure which shows the frequency (horizontal axis) and intensity | strength (vertical axis | shaft) of the ISDN signal which an ISDN in-home apparatus uses for communication with a station building. G. It is a block diagram which shows an example of a structure of a fast aggregation apparatus. G. It is a block diagram which shows an example of a structure of a fast in-home apparatus. G. fast aggregation device and G. ITU-T G. between fast home devices. It is a figure which shows the handshake procedure to this communication performed based on prescription | regulation of 994.1. It is a figure which shows the frequency (horizontal axis) and intensity | strength (vertical axis) of an ISDN signal and the handshake tone of "V43". It is a figure which shows the other example of the communication line connection between the office building of a telephone station, and an apartment house.

[Summary of Embodiment]
The gist of the embodiment of the present invention includes at least the following.

  (1) This is because G.P. can coexist with ISDN in a building having a plurality of homes. A fast communication system comprising: a G.F. fast gathering apparatus and G. fast in-home device and metal wiring in the building, including ISDN communication and G. medium wiring that can be shared for fast communication, fast aggregation device and the G. Fast home devices are connected to each other via G. The handshake tone is a frequency of 320 kHz or higher. fast communication system.

  Such G. In the fast communication system, the medium wiring in the building can be shared with the ISDN. G. fast aggregation device and G. Since a frequency of 320 kHz or higher is used for the handshake tone with the fast in-home device, there is no communication interference with the ISDN during the handshake. Therefore, G. Fast communication can coexist with ISDN and be used simultaneously.

(2) In addition, G. of (1). In a fast communication system, for example, the handshake tone is a frequency used in VDSL handshaking.
In this case, the frequency of “V43” used in VDSL is 320 kHz or higher for both uplink and downlink, and does not cause communication interference with ISDN. This also allows G. Handshaking between the fast aggregation device and the VDSL in-home device is also possible.

(3) Also, G. of (1) or (2). In the fast communication system, the G.G. The fast aggregation device also has a VDSL communication function. The in-home device that wants to handshake with the fast aggregation device itself is a G.G. Information on whether the device is a fast home device or a VDSL home device is used for the G.F. It may be provided to the fast aggregation device.
G. in this case. The fast aggregation device is a G.D. Since communication can be performed with either the fast in-home device or the VDSL in-home device, it is suitable for use in an apartment house where these communication methods are mixed.

(4) In addition, any one of G. In the fast communication system, for example, an ISDN signal is passed through the end of the middle wiring in the building on the station side. A low-pass filter that cuts off the fast signal is provided.
In this case, the middle wiring is connected to G.P. The external wiring, which is a metal wiring connecting the building and the office building, is commonly used by G.fast and ISDN. It is possible to prevent the fast signal and the handshake tone from being emitted.

  (5) From the point of view of the collective device, this is a G.P. that can coexist with ISDN in a building where there are multiple homes. fast aggregation device, G. G.F. installed in the house via a medium wiring that can be shared for fast communication and ISDN communication. fast in-home device and G.F. fast communication, and the G. The handshake tone with the fast in-home device is a frequency of 320 kHz or higher. fast aggregation device.

  Such G. In the fast aggregation device, the medium wiring in the building can be shared with ISDN. G. fast aggregation device and G. Since the handshake tone with the fast in-home device uses a frequency of 320 kHz or higher, there is no communication interference with the ISDN during the handshake. Therefore, G. Fast communication can coexist with ISDN and be used simultaneously.

  (6) From the point of view of in-home devices, this is because G.I. can coexist with ISDN in a building where there are multiple homes. fast in-home device, The G.F. equipped in the building is connected via a medium wiring that can be shared by the communication of the fast and the communication of the ISDN. fast aggregation device and G. fast communication, and the G. The handshake tone with the fast aggregation device is a frequency of 320 kHz or higher. fast in-home device.

  Such G. In the fast home device, the medium wiring in the building can be shared with the ISDN. G. fast aggregation device and G. Since the handshake tone with the fast in-home device uses a frequency of 320 kHz or higher, there is no communication interference with the ISDN during the handshake. Therefore, G. The communication by the fast in-home device can be used simultaneously with the ISDN.

  (7) From the viewpoint of the method, G.D. is used in a building where a plurality of homes exist together with ISDN. Fast communication method in which GDN is used in the building among the metal wiring used for communication with the station by ISDN. via a medium wire that can also be used for fast communication. fast aggregation device and G. Fast in-home devices perform handshaking with each other using a frequency of 320 kHz or higher for handshake tone, and after the handshake is established, G. G. Communicates with fast, G. This is a fast communication method.

  Such G. According to the fast communication method, the metal wiring in the building can be shared with ISDN. G. fast aggregation device and G. Since the handshake tone with the fast in-home device uses a frequency of 100 kHz or more, there is no communication interference with the ISDN during the handshake. Therefore, G. Fast communication can coexist with ISDN and be used simultaneously.

[Details of the embodiment]
Hereinafter, G. according to an embodiment of the present invention will be described. A fast communication system (including a G.fast aggregation device, a G.fast in-home device, and a G.fast communication method) will be described with reference to the drawings.

<< G. Example of Communication System Including Fast Communication System >>
FIG. 1 is a diagram illustrating an example of communication line connection between a telephone station station 1 and an apartment house 100. In the figure, in the housing complex 100, for example, communication by ISDN and G. Fast communication is mixed. In addition, although this figure is shown in a simplified manner, in reality, such a communication device exists in connection with the large number of houses in the apartment house 100.

  A low-pass filter 3 a is connected to the outer wiring 2, which is a metal wiring laid from the office building 1, in the apartment house 100. In the apartment house 100, a middle wiring 4 (thick line portion in the figure), which is a metal wiring, is connected to the low-pass filter 3a. The middle wiring 4 is used for a plurality of types of communication. For example, the middle wiring 4 is connected to the G.G. via a high-pass filter 5 a and an internal wiring (metal wiring) 6. Fast assembly device 7 is connected, and G.G. A fast in-home device 9 is connected. G. The fast assembly device 7 can perform high-speed communication with the station 1 via, for example, the optical fiber 20. In addition, an ISDN in-home device 11 is connected to the middle wiring 4 via a low-pass filter 3 b and an internal wiring (metal wiring) 10.

Note that, in time series, for example, the ISDN in-home device 11 is used first, and then the G.G. fast aggregation device 7 and G.F. A fast in-home device 9 is provided. G. fast aggregation device 7 and G.F. When the fast in-home device 9 is provided, the high-pass filters 5a and 5b and the low-pass filters 3a and 3b are provided.
The high-pass filters 5a and 5b are respectively G.P. fast aggregation device 7 and G.F. It can also be built in the fast in-home device 9. The low-pass filter 3a is a G.G. In the fast aggregator 7, the low-pass filter 3b is a G.G. It can also be built in each fast in-home device 9. In this case, for example, the high-pass filter 5a and the low-pass filter 3a are physically G.P. The high-pass filter 5b and the low-pass filter 3b that are present inside the fast aggregation device 7 are physically G.P. Although it exists in the fast in-home device 9, the basic form of circuit connection is the same as in FIG.

  Here, for example, the low-pass filters 3a and 3b pass a signal having a frequency of 320 kHz or less, and block a signal having a frequency higher than 320 kHz. Conversely, the high-pass filters 5a and 5b block signals having a frequency of 320 kHz or less and allow signals having a frequency higher than 320 kHz to pass.

  FIG. fast aggregation device 7 and G.F. It is a figure which shows the frequency band which the fast household apparatus 9 uses by normal communication. G. In the fast, communication is performed by time division duplex (TDD) using a frequency band from 2.2 MHz to 106 MHz.

  FIG. 3 is a diagram showing the frequency (horizontal axis) and intensity (vertical axis) of the ISDN signal used by the ISDN in-home device 11 for communication with the station 1. The frequency used in ISDN is 0 to 320 kHz, and side lobes (noise) indicated by dotted lines in the figure also exist at frequencies higher than 320 kHz to 640 kHz and 640 kHz. On the other hand, G. The frequency of the main communication used by the fast is 2.2 MHz (2200 kHz) or more as described above, and there is no interference with the ISDN signal even if the side lobe is taken into consideration.

  Returning to FIG. fast aggregation device 7 and G.F. Fast-home device 9 and G.G. Communication can be performed by fast. Due to the presence of the high-pass filters 5a and 5b, G.I. fast aggregation device 7 and G.F. The fast in-home device 9 includes G.P. Fast signal (2.2 MHz to 106 MHz) arrives, but ISDN signal (0 to 320 kHz) does not arrive. On the other hand, due to the presence of the low-pass filter 3a, G.I. The fast signal does not go out to the external wiring 2 outside the apartment house 100. Further, due to the presence of the low-pass filter 3b, the ISDN in-home device 11 has G.I. The fast signal does not reach.

<< G. Configuration of Fast Assembly Device >>
Next, FIG. 3 is a block diagram illustrating an example of a configuration of a fast aggregation device 7. FIG. G. The fast aggregation device 7 is a communication device that performs OFDM (Orthogonal Frequency Division Multiplexing) modulation and demodulation.

  In the figure, input data from the upper network is converted into parallel data by serial-parallel conversion in the input data processing unit 701. The parallel data becomes modulated data for each subcarrier in the modulator 702. The modulated data for each subcarrier is subjected to inverse fast Fourier transform, and converted from frequency domain data to time domain data. The frequency of the subcarrier is G. A large number (for example, about 2000) are discretely present within a fast range of 2.2 to 106 [MHz].

  The data converted into the time domain is converted into serial data by the parallel-serial converter 703 and becomes an analog signal through the D / A converter 704. This analog signal is amplified by an amplifier 705, and is transmitted through a hybrid circuit 706 to G.P. It is transmitted toward the fast in-home device.

  G. When an upstream signal is received from the fast in-home device, an analog signal that has passed through the hybrid circuit 706 and the amplifier 707 is converted into a digital signal by the A / D converter 708, and further converted into parallel data by the serial / parallel converter 709. The parallel data is subjected to a fast Fourier transform in the demodulator 710 and converted from time domain to frequency domain data. The converted data is demodulated for each subcarrier. The demodulated parallel data is converted into serial data by the output data processing unit 711 and becomes output data.

  G. The fast aggregation device 7 is provided with a control unit 712 and a storage unit 713. The control unit 712 controls transmission / reception timing and the like.

<< G. Configuration of fast in-house device >>
FIG. 3 is a block diagram illustrating an example of a configuration of a fast in-home device 9. FIG. G. The fast in-home device 9 is a G.G. Similar to the fast aggregation device 7, it is a communication device that performs OFDM modulation and demodulation.

  In the figure, input data from an information processing terminal such as a personal computer is converted into parallel data by serial-parallel conversion in an input data processing unit 901. The parallel data is modulated data for each subcarrier in the modulator 902. The modulated data for each subcarrier is subjected to inverse fast Fourier transform, and converted from frequency domain data to time domain data. The frequency of the subcarrier is G. A large number (for example, about 2000) are discretely present within a fast range of 2.2 to 106 [MHz].

  The data converted into the time domain is converted into serial data by the parallel-serial converter 903, and becomes an analog signal through the D / A converter 904. This analog signal is amplified by an amplifier 905, and is transmitted through a hybrid circuit 906 to G.P. Sent to the fast aggregation device.

  G. When a downstream signal is received from the fast aggregation device, an analog signal that has passed through the hybrid circuit 906 and the amplifier 907 is converted into a digital signal by the A / D converter 908, and further converted into parallel data by the serial / parallel converter 909. The parallel data is subjected to fast Fourier transform in the demodulator 910 and converted from time domain to frequency domain data. The converted data is demodulated for each subcarrier. The demodulated parallel data is converted into serial data by the output data processing unit 911 and becomes output data.

  G. The fast in-home device 9 is provided with a control unit 912 and a storage unit 913. The control unit 912 controls transmission / reception timing and the like.

<< G. Handshake in fast >>
FIG. fast aggregation device and G. ITU-T G. between fast home devices. It is a figure which shows the handshake procedure to this communication performed based on prescription | regulation of 994.1. Such a handshake procedure is newly described in G. It is executed when setting up a fast in-home device or when an existing relationship is reset for some reason.

  In the figure, first, in the handshake stage (S1), G.D. From the in-home device, the self-G. A list (Capability list) indicating that it corresponds to “fast” is referred to as “G. Send to fast aggregation device. G. received this. The fast aggregation device itself is also a G.G. A list indicating that it corresponds to “fast” is G.fast. Send to fast home device. As a result, G. fast aggregation device; A handshake is established with the fast in-home device. The G, fast aggregation device is an upper model that replaces the VDSL communication device, and therefore has upward compatibility. Therefore, the G, fast aggregation device also supports VDSL (ITU-T G.993.2).

  Subsequently, there are stages of channel discovery (S2), training (S3), channel analysis and exchange (S4). Fast main communication is enabled (S5).

  G. fast aggregation device and G. The fast in-home apparatus uses “V43” used in the VDSL handshake as a handshake tone at the time of handshaking. By using “V43”, G. Handshaking between the fast aggregation device and the VDSL in-home device is also possible. VDSL to G. In the transition stage to fast, G.F. Some users want to switch to fast early, while others want to continue using VDSL. Therefore, G. The fast aggregator is G. It is practically meaningful that handshaking can be performed with not only the fast in-home device but also the VDSL in-home device and this communication can be performed.

“V43” is the following frequency.
Upstream: 4071 kHz, 4191.75 kHz, 4308.875 kHz
Downlink: 1108.3125kHz, 161.6875875kHz, 2203.68755kHz
Thus, the frequency of “V43” is a frequency of 320 kHz or more in both the uplink and downlink.

FIG. 7 is a diagram showing the frequency (horizontal axis) and intensity (vertical axis) of the ISDN signal and the handshaking tone of “V43”. As illustrated, the handshake tone has a frequency higher than 320 kHz which is the upper limit of the ISDN signal. Therefore, G. The fast handshake tone does not interfere with the ISDN signal. Although it can be said that the handshake tone preferably has a frequency that is not less than the upper limit frequency f _h (960 kHz in FIG. 7) of the side lobe, in practice, the intensity of the side lobe may be lower than that of the ISDN signal. There is a possibility that it can be used for a handshake tone even at a frequency within the side lobe band (320 kHz or more). The handshake tone passes through the high-pass filters 5a and 5b but cannot pass through the low-pass filters 3a and 3b. Therefore, the handshake tone does not go out to the external wiring 2 outside the apartment house 100. That is, the middle wiring 4 is connected to the G.G. The external wiring 2 that connects the housing complex 100 and the office building 1 is shared by G.Fast and ISDN. It is possible to prevent a fast signal and a handshake tone from being produced.

<Summary>
As described above, G. of FIG. In the fast communication system, the middle wiring 4 in the apartment house 100 can be shared with ISDN. G. fast aggregation device 7 and G.F. Since the frequency of “V43” of 320 kHz or higher is used for the handshake tone with the fast in-home device 9, there is no communication interference with the ISDN during the handshake. Therefore, G. Fast communication can coexist with ISDN and be used simultaneously.

<< G. Other Examples of Communication System Including Fast Communication System >>
An example of a communication system including the above-described VDSL in-home device will be described.
FIG. 8 is a diagram showing another example of communication line connection between the central office 1 of the telephone station and the apartment house 100. The difference from FIG. 1 is that a VDSL in-home device 13 is connected to the middle wiring 4 via a high-pass filter 5 c and an internal wiring 12. The high pass filter 5c is the same as the high pass filters 5a and 5b. Other configurations are the same as those in FIG.

  In this case, the VDSL in-home device 13 is connected to the G.G. In performing handshaking with the fast aggregation device 7, information indicating that the device itself is a VDSL in-home device is obtained from the G.F. This is provided to the fast aggregation device 7 (list transmission in FIG. 6). Based on this, G.G. The fast aggregation device 7 performs VDSL communication with the VDSL in-home device 13.

  That is, G. The fast aggregation device 7 also has a VDSL communication function. The in-home device to be handshaked with the fast aggregation device 7 itself is a G.G. Information on whether the device is a fast home device or a VDSL home device. This is provided to the fast aggregation device 7. G. in this case. The fast aggregation device 7 is a G.D. Since communication can be performed with either the fast in-home device 9 or the VDSL in-home device 13, it is suitable for use in the housing complex 100 in which these communication methods are mixed.

《Supplementary Note》
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 Station 2 External wiring 3a, 3b Low-pass filter 4 Middle wiring 5a, 5b, 5c High-pass filter 6 Internal wiring 7 G. Fast assembly device 8 Internal wiring 9 G. Fast home device 10 Internal wiring 11 ISDN home device 12 Internal wiring 13 VDSL home device 20 Optical fiber 100 Apartment 701 Input data processing unit 702 Modulator 703 Parallel / serial converter 704 D / A converter 705 Amplifier 706 Hybrid circuit 707 Amplifier 708 A / D converter 709 Series-parallel converter 710 Demodulator 711 Output data processing unit 712 Control unit 713 Storage unit 901 Input data processing unit 902 Modulator 903 Parallel to serial converter 904 D / A converter 905 Amplifier 906 Hybrid circuit 907 Amplifier 908 A / D converter 909 serial-parallel converter 910 demodulator 911 output data processing unit 912 control unit 913 storage unit

Claims (7)

G. can coexist with ISDN in a building with multiple homes. a fast communication system,
G. provided in the building. a fast assembly device;
G. provided at the home. fast in-home devices;
Metal wiring in the building, including ISDN communication and G. medium wiring that can be shared for fast communication,
G. fast aggregation device and the G. Fast home devices are connected to each other via G. The handshake tone is a frequency of 320 kHz or higher. Fast communication system.   2. The G.3 according to claim 1, wherein the handshake tone is a frequency used in a VDSL handshake. Fast communication system.   G. The fast aggregation device also has a VDSL communication function. The in-home device that wants to handshake with the fast aggregation device itself is a G.G. Information on whether the device is a fast home device or a VDSL home device is used for the G.F. The G.F.1 according to claim 1 or 2, wherein the G.F. Fast communication system.   An ISDN signal is passed through the end of the middle wiring in the building on the station side. The G.F. 1 according to any one of claims 1 to 3, further comprising a low-pass filter that cuts off the fast signal. Fast communication system. G. can coexist with ISDN in a building with multiple homes. fast assembly device,
G. G.F. installed in the house via a medium wiring that can be shared for fast communication and ISDN communication. fast in-home device and G.F. fast communication, and the G. The handshake tone with the fast in-home device is a frequency of 320 kHz or higher. Fast assembly device. G. can coexist with ISDN in a building with multiple homes. fast in-home device,
G. The G.F. equipped in the building is connected via a medium wiring that can be shared by the communication of the fast and the communication of the ISDN. fast aggregation device and G. fast communication, and the G. The handshake tone with the fast aggregation device is a frequency of 320 kHz or higher. Fast home device. G. used in coexistence with ISDN in a building with multiple homes. Fast communication method,
Of the metal wiring used for communication with the station by ISDN, G. via a medium wire that can also be used for fast communication. fast aggregation device and G. fast in-home devices handshake with each other using a frequency of 320 kHz or higher for handshaking tones,
After the handshake is established, the G.G. Make a main communication with fast,
G. Fast communication method.

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