JP2002218275A - Broadband communication system by tv antenna cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a broadband communication system by a TV antenna cable by which an IP network by IP-VPN, the Internet and the various kinds of TV broadcasting networks are connected by using the TV antenna cable already installed inside user's house. SOLUTION: An optical fiber cable from a communication facility center is connected to an ONU installed to a telegraph pole or the like near user's house and OFDM modulated signals are radio transmitted. In user's house, the radio signals are received by a subscriber's radio antenna and connected through a broadband transmitter-receiver to a multiplex transmitter with a built-in gateway with an NAT router and TV signals received by the various kinds of TV antennas are synthesized inside the multiplex transmitter and laid inside user's house by one TV antenna cable. Also, a splitter with a modem is connected to the terminal of the TV antenna cable, broadband signals are branched from an LPF inside the splitter with the modem, LAN connection is performed through the modem further and the TV signals are branched from an HPF and connected to TV.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for combining a broadband signal connected to an IP network and the Internet with a TV signal received by various TV antennas and transmitting the combined signal through a single TV antenna cable. It is possible to connect to an IP network, an Internet network, and various TV broadcasting networks by IP-VPN using an existing TV antenna cable in the house.
The present invention relates to a broadband communication system using a TV antenna cable.

[0002]

2. Description of the Related Art With the remarkable spread of the Internet and multimedia in recent years, when connecting the Internet, which is a high-speed and broadband backbone network, to a user's house, a communication facility center is connected to the user's house via an optical fiber cable. FTTB (Fiber To The Building), which connects to the user's home by relaying the ONU (Optical Network Unit) installed directly at the user's home,
FTTH (Fiber To The Home), FTTC (Fiber To The
Curb), or by a conventional metallic cable xDSL.

In TV broadcasting, a UHF signal received from a UHF antenna and a VHF signal received from a VHF antenna are mixed by a UV mixer and a receiver, converted into a single TV antenna cable, and converted into a TV. Connected. Furthermore, in CS broadcasting or BS broadcasting, a TV signal received from a CS antenna or a BS antenna is tuned to a tuner or STB (Set T
op Box) and connected to TV.

[0004]

However, in order to enjoy network information and TV broadcasts as described above, it is necessary to lay at least three types of cables, such as telephone lines, optical fiber cables, and TV antenna cables, in the user's home. there were. Also, in order to enjoy the network information and the TV broadcast in each room of the user's house, it is necessary to similarly lay at least three types of cables, which is physically complicated and economically expensive. was there.

The present invention has been made to solve the above problems, and combines a broadband signal connected to an IP network and the Internet with a TV signal received by various TV antennas to form one signal. By transmitting via a TV antenna cable, an IP network, an Internet network, and various types of T
It is an object of the present invention to provide a broadband communication system using a TV antenna cable that can be connected to a V broadcast network.

[0006]

In order to solve the above problems, in a broadband communication system using a TV antenna cable according to the present invention, an optical fiber cable from a communication equipment center for managing and operating a broadband communication network is connected to a telephone pole or the like near a user's house. OFDM (Orthogonal Frequency Division Multiplexin) as a local base station for subscriber radio
g) Wirelessly transmit the modulated signal. Further, at the user's home, the radio signal is received by a subscriber radio antenna, and further connected to a multiplex transmission device having a built-in gateway with a NAT router via a broadband transceiver.
Various TV signals received by the S / BS antenna, UHF antenna, and VHF antenna are combined in the multiplex transmission device,
It is laid in the user's premises with one TV antenna cable.

Also, a splitter with a modem is connected to the terminal of the TV antenna cable, a broadband signal is split from the LPF in the splitter with the modem, and a PC or digital telephone is connected to a LAN cable via the modem. Performs packet communication with an IP network or the Internet, and a HPF in the splitter with a modem.
The TV signal is further separated and connected to the TV to receive various TV broadcasts.

[0008]

An embodiment of the present invention will be described with reference to the drawings. Figure 1
FIG. 1 is an embodiment of a system diagram for constructing a broadband communication system using a TV antenna cable according to the present invention.

First, an ONU in which an optical fiber cable 2 from a communication equipment center 1 for managing and operating a broadband communication network is installed on a telephone pole 3 or the like near a user's house.
4 and transmits the OFDM-modulated signal wirelessly from the pole antenna 5 using the ONU 4 as a local base station for subscriber radio. The ONU 4 includes an O / E converter, an OFDM module, a radio transceiver, and the like for converting a broadband signal transmitted via the optical fiber cable 2 into an electric signal.

At the user's home, the wireless signal received by the subscriber wireless antenna 6 is connected to the gateway 14 with a NAT router in the multiplex transmission device 13 via the broadband transceiver 7. The signal from the gateway 14 with the NAT router is transmitted through the modem 15 to the LPF.
(Low Pass Filter) 16. Also, CS / BS
The CS / BC signal received from the antenna 8 and the UV signal obtained by mixing the UHF signal and the VHF signal received from the UHF antenna 9 and the VHF antenna 10 by the UV mixer 11 are connected to the receiver 12 to amplify the signal. It is connected to an HPF (High Pass Filter) 17 in the multiplex transmission device 13. Then, the broadband signal from the LPF 16 and the TV signal from the HPF 17 are combined by a coupler 18 and laid in a user's house with one TV antenna cable 19. Note that the TV antenna cable refers to a coaxial cable, a parallel feeder cable, or the like, and basically uses an existing cable in a user's house, but newly lays it in a place where it is not laid. In the figure, GW represents a gateway, MD represents a modem, and C represents a coupler.

The terminal of the TV antenna cable 19 is connected to a coupler 21 in a splitter 20 with a modem. The coupler 21 at the time of signal reception has a splitter function. The coupler 21 splits a broadband signal from the LPF 23 in the splitter 20 with a modem, and further connects a PC 30 or a digital telephone 31 to a LAN cable 29 via a modem 24 to connect the I / O.
Packet communication can be performed with a P network network or the Internet network. Further, the splitter 20 with the modem
The TV signal is demultiplexed from the HPF 22 in the
Top Box) 26 can be connected to TV 26 to receive various TV broadcasts, or audio device 27 can be connected to receive various audio broadcasts. Also, the modem 24 and the STB 25 in the splitter with modem 20 are connected to the USB
If you connect with the cable 32 and further connect the telephone line 28,
The TV 26 can be connected to a public network.

FIG. 2 is a diagram showing a connection method when a plurality of combinations of the multiplex transmission device and the splitter with a modem are installed in FIG.
This is a connection example in a case where N connection is performed or a TV 26 is installed.

A multiplex transmission device 13 having a built-in gateway 14 with a NAT router for receiving a broadband signal and various TV signals from the communication equipment center 1, and a signal from the multiplex transmission device 13 is demultiplexed to a LAN. The connection method of the PC 30 or the digital telephone 31 by the connection and the connection method of the TV 26 are the same as the description of FIG. Here, the signal line connected to the LPF 16 in the multiplex transmission device 13 and the HPF 1
The required number of multiplexing transmission devices 13 ', from which the gateway 14 with the NAT router and the modem 15 are omitted, are dropped and connected to the signal lines connected to. In this connection, the signal line from the LPF 16 in the multiplex transmission device 13 is connected to the LPF 16 in the multiplex transmission device 13 ′, and the signal line from the HPF 17 in the multiplex transmission device 13 is connected to the inside of the multiplex transmission device 13 ′. HP
Connect to F17. Then, the broadband signal from the LPF 16 and the TV signal from the HPF 17 are coupled to the coupler 1.
8 and laid in each room of the user's house with one TV antenna cable 19.

The terminal of the TV antenna cable 19 is connected to a coupler 21 in a splitter 20 with a modem installed in each room of the user's house. In this connection example, the STB 25 is omitted,
A broadband signal is split from the LPF 23 in the splitter 20 with a modem, and a PC 30 or a digital telephone 31 is connected to a LAN cable 29 via the modem 24 to perform packet communication with an IP network or the Internet. Further, the splitter with modem 2
The TV signal is demultiplexed from the HPF 22 within 0 and connected to the TV 26 to receive various TV broadcasts.

[0015]

As described above, if the broadband communication system using the TV antenna cable of the present invention is adopted in the next generation network, the broadband signals connected to the IP network and the Internet and various T
By combining the TV signal received by the V antenna and transmitting the signal through one TV antenna cable, the IP signal can be transmitted using the existing TV antenna cable in the user's house.
-It is possible to connect to an IP network, an Internet network, and various TV broadcasting networks by VPN. For this reason, there is no need to lay a new optical fiber cable or LAN cable in the user's home, and the enormous effect that the Internet and multimedia can be enjoyed simply by installing an inexpensive multiplexing transmission device or a splitter with a modem. Can play.

[Brief description of the drawings]

FIG. 1 is an embodiment of a system diagram for constructing a broadband communication system using a TV antenna cable according to the present invention.

FIG. 2 is a diagram showing a connection method when a plurality of combinations of a multiplex transmission device and a splitter with a modem are installed in FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 communication equipment center 2 optical fiber 3 telephone pole 4 ONU 5 pole antenna 6 subscriber radio antenna 7 broadband transceiver 8 CS / BS antenna 9 UHF antenna 10 VHF antenna 11 UV mixer 12 receiver 13 multiplex transmission device 14 with NAT router Gateway 15 Modem 16 HPF 17 LPF 18 Coupler 19 TV antenna cable 20 Splitter with modem 21 Coupler 22 HPF 23 LPF 24 Modem 25 STB 26 TV 27 Audio device 28 Telephone line 29 LAN cable 30 PC 31 Digital telephone 32 USB cable

Continuing from the front page (72) Inventor Tomo Kasai 8-3 Miyukicho, Shizuoka-shi, Shizuoka Prefecture Tokyo Seika Building 4th floor Teruya Co., Ltd. Person Kohei Nakagawa 5-817-55 F-term, Hibarigaoka, Zama City, Kanagawa 5C025 AA23 BA03 5C056 FA03 HA01 HA04 HA14 HA15 5K033 AA04 BA01 BA07 DA06 DB01 DB04 DB22

Claims (2)

[Claims] 1. An optical fiber cable (2) from a communication equipment center (1) for managing and operating a broadband communication network is connected to an ONU (4) installed on a telephone pole (3) or the like near a user's house, and the ONU (4) is connected. Means for wirelessly transmitting an OFDM-modulated signal as a local base station of a subscriber radio, and receiving the radio signal at a subscriber's home by a subscriber radio antenna (6) and further via a broadband transceiver (7) to a NAT router Multiplexed transmission device (13) with a built-in gateway (14), and various multiplexed TV signals received by CS / BS antenna (8), UHF antenna (9), VHF antenna (10). Means for synthesizing the signal in the device (13), and laying the signal in the user's house with one TV antenna cable (19). And a broadband communication system using a TV antenna cable. 2. A splitter with a modem (20) is connected to a terminal of the TV antenna cable (19), and a broadband signal is demultiplexed from an LPF (23) in the splitter with a modem (20). LAN via
PC (30) or digital telephone (3
1) means for performing packet communication with an IP network or the Internet network by connecting the like; and a HPF (22) in the splitter with modem (20) for demultiplexing a TV signal to T
V (26) for receiving various TV broadcasts, and can be connected to an IP network, an Internet network, and various TV broadcast networks with one TV antenna cable (19). The broadband communication method using a TV antenna cable according to claim 1.