JP3424660B2 - Method of constructing TV reception, Internet connection and premises LAN system using existing TV common reception facilities - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] The present invention relates to an apartment house, a building,
Coaxial cables laid in large structures such as hotels
Utilize existing TV common reception facilities in
In addition to reception of Levi, Internet connection and premises LAN
And three telecommunication systems.
In an empty frequency band not used for Levi broadcasting, 1
By transmitting over more communication channels,
I-speed, two-way communication built with high quality and low cost
It is about a reliable system. BACKGROUND OF THE INVENTION With the recent rapid spread of the Internet,
Information disclosure and collection using e-mail and homepage
In addition to various business models using the Internet,
Dell is also available and convenience is improving. On the other hand, the penetration rate of personal computers is increasing year by year.
And now reaches about 40% of Japanese homes,
In the future, multiple PCs per home (from one per home)
(One per person) is expected to spread. And
Accessing the Internet using a personal computer
Become. [0004] Therefore, the Internet population is constantly increasing.
And infrastructure development is indispensable. Moreover, biography
The data to be sent also changes from text data to still images,
In addition, you can send a wide range of video and audio
Transmission speed is high and large capacity
A high-speed Internet network that can transmit various data
There is a need. [0005] By the way, the Internet in each household
Use CATV or dedicated line for connection to
Many have already been drawn into each household, except for some
Using a rare telephone line (twisted pair line)
You. If you are using this twisted pair wire,
There is a limit to increasing capacity and capacity. [0006] There is a demand to respond to high-speed operation and the like.
In the case of a single-family house, CA
By contracting with a TV or drawing a dedicated line,
It is possible to respond freely. However, the present invention is targeted
Multi-family apartments such as condominiums,
In the case of an individual, individual residents, etc.
It is not possible to draw CATV or a dedicated line without permission. Follow
Building, Mansi, where CATV system is not installed
In hotels and hotels, use twisted pair wires to
I have to connect to the Internet. On the other hand, in accordance with the trunk infrastructure,
However, a system that can handle high-speed and large-capacity data
It is desirable to build. And as an example of a solution,
Building CATV systems and optical fiber cables
May be placed inside. However, the existing building
In such a case, wiring and light for building a CATV system
There are various ways to install fiber cables etc. in the wall
Is practically difficult because of the restriction of Therefore, if
When performing wiring, etc., it may be exposed outside the wall
Become. In addition, the construction for that, Internet connection
To all households regardless of whether they wish to
Become. Then, for households that do not wish to do so,
You will be forced to do unnecessary work, and you will get agreement
Often it can be difficult. [0008] Furthermore, using twisted pair wires,
When connecting to the Internet, there are the following problems. Sand
In other words, telephone terminals are often
And at most two places including the living room
Will be installed in On the other hand, the location of the PC
May be installed in the study or other rooms. Do
And a modular terminal is deployed in the room where the PC is installed
May not be done,
Route telephone lines from the JURA terminal
It will be used to connect to the telephone line. Then,
If the telephone line is routed, the telephone line is exposed in the room.
Not only looks bad, but also the phone line
Sometimes it becomes. In the case of a wireless system,
Although there is no problem, the problem remains in terms of security of data transmission. The present invention has been made in view of the above background.
The purpose is to solve the above problems
TV co-located with coaxial cable
Use telephone lines in buildings equipped with receiving equipment
Transmission of high-capacity information at high speed
And a LAN system inside the building.
And can be used as a TV receiver as before.
Is to do so. [0010] To achieve the above object
Therefore, the present invention is applicable to large-scale structures such as apartment houses, buildings and hotels.
The coaxial cable laid on the structure and the coaxial cable
And the coaxial cable that connects the antenna to the building
Connected to a room inside the large structure.
Use the existing TV common reception facility equipped with
If the in-building amplifier is unidirectional, use a bidirectional amplifier.
Replace and connect a mixer upstream of the bidirectional amplifier
To connect the antenna via the mixer.
Both are connected to the antenna on the upstream side of the mixer.
Route the center modem, router, etc.
Connect devices for internet connection and premises LAN connection
The TV terminal is coaxial with a terminal such as a personal computer.
To connect cables and perform data transmission between them
By connecting a terminal modem for the interface of
The terminal connects the device via the coaxial cable.
Internet connection via Internet TV
Internet connection and building LAN system in building
Is the way. And the constructed system is the coaxial
Downstream to the terminal modem transmitted over the cable
Data communication signals are used for idle channels not used for TV broadcasting.
Using the wavenumber band, the same
The upstream data communication signal transmitted on the axis cable is
A frequency band higher than the frequency band of the downlink data communication signal
Using the downlink data communication signal and the uplink data communication signal.
The communication signal is an empty channel among a plurality of communication channels.
Channel using the communication channel and the communication channel to be used.
The control for establishing and adjusting the channel is based on the center model.
Transmission output from the terminal modem transmitted from the terminal modem
Uplink channel designation for transferring information to uplink carrier
Information, receiving downlink communication signals from the center modem
Channel designation information for determining the receiving channel to use
Control the strength of the output level from the terminal modem
Output level adjustment information and terminal modems for the same
The center modem constantly monitors the identification and status of the
System using control signals containing terminal modem management information
To be [0011] Apartment houses and other apartments and office buildings
Or tenant buildings or other buildings,
TV reception facilities are installed in the building where
You. Therefore, according to the present invention, the TV shared reception facility in the building is
Internet in the installed building (large structure)
Build a facility environment that can be connected and also has a LAN inside the building
Coaxial cable already laid in the building
, And TV shared reception facilities in the building using it, and more
Specifically, coaxial cables are actively used as transmission lines
I was there. In other words, the transmission band of a coaxial cable is
Broadband and wiring distance within the building is several hundred meters or less
And it is short enough to be routed in one building,
There is almost no sound. Therefore, as a transmission path (transmission medium)
Is used enough to transmit large amounts of information at high speed
it can. Then, on the transmission line, the signal is transmitted by an RF signal.
Is transmitted, so that the center modem
It performs conversion with signals that can be communicated on the Internet network. One
In other words, data sent from the Internet
Is converted to an RF signal by a modem and transmitted via a transmission line.
It is transmitted to the TV terminal. Also flows through the transmission line
The information is converted to a baseband signal by the center modem
Therefore, after that, it is directly connected to the Internet network,
Connect to the Internet network through the contracted upper-level provider
Continued. [0014] It is directly connected to the Internet network.
Or when connected to a higher-level provider
Even the output of the center modem is physically direct to the predetermined communication
When connecting to a line and when converting to a predetermined communication protocol
This includes any case where output is performed via a device.
In other words, "direct" refers to a physical connection directly to the line.
It includes not only the case but also the concept described above. In addition, the Internet connection of the present invention,
Internet connection using the in-building LAN system
Users who send and receive data from computers such as personal computers
Data does not normally use RF signals,
RF signals between computers and types handled by computers
Signal (for example, Ethernet (registered trademark) compatible signal)
Install a terminal modem to convert to. Also, by using a router or the like,
Multiple computers connected to the TV
By transmitting and receiving information between data
You can easily build a LAN connection system
You. According to the present invention, a mode for a normal telephone line is used.
The number of installations is larger than that of the Jura terminals, and each room has
Uses a TV terminal that is often installed, so
Even if you install a computer in a room,
If there is a terminal, route the cable out of the room
No need, you can easily connect to the Internet
It works. Further, as described above, the transmission line is used.
By doing so, separate wiring for Internet connection
In existing buildings.
Can be simplified, for example, by implementing the method shown below.
A facility environment that can simply be connected to the Internet can be constructed. That is, the above-mentioned premises TV common reception equipment and
Change the amplifier that connects to the TV antenna to a bidirectional amplifier.
Replace. And a distributor on the upstream side of the bidirectional amplifier.
And the RF signal flowing through the transmission line
By installing a center modem to convert to
Connect the computer connected to the TV terminal to the Internet
It is possible to construct a facility environment that can be connected to the Internet. Further, in the present invention, a coaxial cable is used.
The used frequency band of the upstream signal (data communication signal)
A band higher than the frequency band of the downlink signal is used. Yo
The transmission cable (coaxial cable) in the building
Signal also has a high frequency band, so it is generated from electrical equipment, etc.
Noise is not easily superimposed, and high-quality transmission can be performed. The communication channel used is an uplink signal.
"One-to-one", one for each signal
, One may be plural, and “1: n” may be used.
The number may be “n to m” which is plural. The communication channel used in this manner is established and adjusted.
Control for adjusting the transmission information transmitted from the terminal.
Channel designation information for changing the
Receiving the communication signal from the center modem
Channel designation information for determining the receiving channel for
To control the strength of the output level from the terminal modem
Uplink output level adjustment information and identification and status of each terminal
Terminal model for the center modem to constantly monitor the status
Configuration by using a control signal consisting of system management information
Good. In addition, the terminal modem is located at the center from the terminal modem.
A request signal for establishing a communication connection to the modem is started. That is, Internet connection, LAN connection
As the number of users (terminal computers) using
Assuming that the communication carrier is one wave, such a large number of users
If used at the same time, a traffic jam will occur and communication
Speed may be reduced. So multiple communications
Transmission by preparing and distributing channels
Higher speed can be maintained. Also output
High quality data transmission is possible by adjusting the level
Noh. FIG. 1 shows a main part of an embodiment of the present invention.
The main part is shown, but in order to make the configuration of FIG.
To do. First, the amplifier inside the wing of the TV set
In the case of one direction, the bidirectional amplifier 5 is replaced. Already
If a bidirectional amplifier 5 is installed,
I will use it. Next, the mixer 3 is connected to the bidirectional amplifier 5.
Then, via the mixer 3, the
Connection with the center modem,
Necessary equipment for internet connection such as
Connect the container. In addition, the installed TV terminal 8
Is a terminal interface for PCs and TV receivers.
Install a terminal modem that also serves as a connection for the transceiver. In this form
Shows an example of application to apartments and other condominiums.
You. Basically, tenant buildings, hotels and other buildings
The same can be applied to a large-sized structure. According to the present invention, a plurality of televisions installed in each household are provided.
From the B terminal, use the TV's shared reception facility in the building
Higher than the twisted pair wire used for telephone lines in households
It constitutes a high-speed next-generation communication system. As shown in FIG.
Be prepared that the signal received by the TV antenna 1 is BS / U
-V amplifier 2 amplifies the signal in the reception band, and
The received signal is passed through the mixer 3 to the bidirectional amplifier
It is provided to the amplifier 5. This bidirectional amplifier 5 has a distribution
Transmission lines composed of coaxial cables through the
In 6 are connected in parallel. This transmission line 6
Are installed at each level of the apartment complex 7 in this example.
You. The transmission line 6 is connected in series to each
The television terminal 8 provided in the room is connected. Rice cake
As the laying pattern of this transmission line 6,
As described above, TV terminals are connected in parallel at each layer, and serially at each layer.
It is not necessary to limit to the one provided with the child 8, but the direct / parallel glue.
Grouping is optional, and all TV terminals 8
They may be arranged in parallel. Usually, a plurality of rooms exist in one household.
In many cases, each room has a TV terminal 8
Is installed. In other words, a plurality of TV terminals 8 per household
Will be deployed. Therefore, each household has a television
TV terminal 8 provided in the room to be installed
By connecting the TV 10, the TV in any room
Can be seen. This is the TV joint reception system
is there. The plurality of transmission lines 6 and the television
The terminal 8 constitutes an in-building TV reception facility. Here, in the present invention, the personal computers installed in each household
Sokon 11 and Internet network (upper provider 12)
In particular, on the building's data transmission path,
A shared reception facility was used. That is, the transmission line
6 is composed of a coaxial cable,
The transmission bandwidth of the line 6 is very wide. Therefore,
For retransmission channels of VHF and UHF television broadcasts
Utilizing unused frequency bands, uplink signals and downlink
The signal was transmitted. Specifically, the broadcast frequency of cable television
The downlink signal used in consideration of the band is, as shown in FIG.
Within the range of 0 to 770 MHz (usually 450 MHz or less)
In the frequency band of the downlink signal, 7 channels
Channel and at least one of 8 channels (4 MHz bandwidth)
The other frequency band is an empty channel. further,
Frequency band between VHF band and UHF band (222 to 470)
MHz: Super high band)
ing. [0030] Therefore, in the building for Internet connection
The frequency band of the downstream signal is
(For N channels). Rice cake
7 channels or 8 channels (depending on region)
Use the channel corresponding to
May be used. Ma
Also, instead of using multiple channels in this way,
If you decide to use one channel,
good. Also, between 1032 and 2150 MHz,
This is a signal for BS / CS-IF. So the day
The upstream communication signal in the data communication building
Any channel in 800-1000MHz which is several bands
Channel is used, but the frequency band used is
However, the present invention is not limited to this.
If so, lower the lower limit of the inbound signal in the building
Is also good. Also, in fact, all such wide areas are used
Instead of performing a predetermined frequency band (for example, 8
21-866MHz)
May be. As described above, since the upstream signal is transmitted,
In the usual TV shared reception facility in the building, the TV antenna 1
Is a one-way amplifier flowing toward each transmission line 6
However, in the present invention, since it is necessary to perform bidirectional transmission, bidirectional amplification is performed.
Vessel 5 is used. Therefore, existing apartments and other large
TV structure has already been installed
If a one-way amplifier is installed,
This can be dealt with by replacing the direction amplifier 5. Further
As described later, the upstream side of the bidirectional amplifier 5
System connected to the TV antenna 1
To connect to equipment for LAN connection and LAN connection
, The distributor 4 is provided upstream of the bidirectional amplifier 5.
Provided. The bidirectional amplifier 5 internally has an upstream signal
To separate and transmit the downstream signal and amplify it in the middle
This allows each signal to be transmitted to the other side without attenuating
Is what you do. Therefore, a duplexer is provided at the input / output end,
So that it can be divided into a down line and an up line
I have. The basic configuration of the bidirectional amplifier 5 is generally used
It is the same as what is allowed. As described above, in this embodiment, the building of the apartment house 7
Both the upstream and downstream signals flowing through the transmission line 6
The high frequency band makes it more resistant to noise and
It is possible to minimize the transmission of superimposed sound. The upstream side of the bidirectional amplifier 5 is a mixer.
The television antenna is divided into two systems by 3 and described above.
1 and an RF signal and a baseband signal (for example,
Center modem 14, which performs the conversion of
PCs 11 located in each household and routers 15
Each time between the router 15 and the higher-level provider (main line system).
Connect trunk modems 16 for connecting outputs in that order
are doing. That is, as will be described later, the personal
The computer 11 transmits data via the transmission line 6.
First, via the bidirectional amplifier 5, the center modem 14
Can send and receive data to and from the router 15.
You. Then, as will be described later, the personal computer 11
The output signal (eg, baseband signal)
The signal is converted to an RF signal, and the RF signal is transmitted
Since it is transmitted through the inside 6 and reaches the center modem 14,
This center modem 14 converts the RF signal to Ethernet
Demodulates to the system baseband signal. Of course, router 1
5 from PC 5 to PC 11 (base
Band signal) is converted to an RF signal by the center modem 14.
Is converted to a predetermined terminal modem 1 via the transmission line 6.
8 On the other hand, using this system,
At the subscriber's home that connects the
18 and connect the terminal modem 18
11 is connected. Also, this terminal modem 1
8 also has a terminal for connecting the television 10.
You. Of course, the TV 10 is directly connected to the TV terminal 8.
It is also possible. The upstream signal transmitted from the personal computer 11
The signal is an RF signal transmitted within the coaxial by the terminal modem 18.
Frequency converter that is converted to
Converts to high frequency signal of 800-1000MHz
Thereafter, the power is supplied to the transmission line 6. On the other hand, in the above-described embodiment, as an example,
6 channels as channels for transmitting upstream signals inside the building
Channels were prepared, and downlink signals were prepared for N channels. One
That is, all of them are for a plurality of channels. And empty
Automatically selects a channel, for both upstream and downstream signals
By using a multi-carrier transmission method, information (data
Data). This allows free space
Automatically detects channels and channels with low noise
And can be used for stable large-capacity transmission
It is possible to do. In other words, the number of users
Even if the amount of data to be sent is large,
We can respond without deteriorating quality. Also, one terminal (personal computer) is
Channel actually used for Internet connection etc.
Is a vacant (load
To use one channel)
You. Of course, a plurality of channels may be used. Then, when determining the channel to be used or during communication
Is sent from the center modem 14 in this embodiment.
This is performed based on the control signal. That is, the control signal
The transmission information transmitted from the terminal modem
Channel designation information for changing to the
Determine the communication channel used for the signal), center modem
Receive channel for receiving downlink communication signal from 14
Channel designation information (used for downlink signals inside the building)
Determine the communication channel to use), and output from the terminal modem.
Up output level adjustment information for controlling the power level strength
And the center modem constantly monitors information and the identification and status of each terminal.
Connection establishment and adjustment other than terminal modem management information for connection
There is necessary information for The communication channel used is the terminal mode.
Monitors dem management information and status of assigned communication channels
Is determined on the side of the center modem 14 to be monitored.
Up / down channel designation information and up output described above
Sent to specified terminal modem as level adjustment information
Then, the terminal modem sends the information (data) according to the received control information.
Data). Further, the method for transmitting the control signal is as follows.
In this case, the method of transmitting as an independent control signal and the data
A method of including it in the carrier can be adopted. In the former case,
Controls the actual data part (data carrier) in the communication carrier
Control signal is not included, and the actual data transmission speed is reduced.
Absent. When performing transmission control with multicarrier,
It is necessary to consider the communication establishment procedure for each terminal, but the control system
Be simple. In the case where the data carrier is included in the latter data carrier,
Tandem system that sends control signals to all channels
And a parallel method that sends a control signal to a specific channel
Any of these can be adopted. In other words, in the case of the tandem method
Data and control signals are mixed in each channel
(Logically multiplexed and separated)
, The modulation and demodulation circuit of each carrier can be shared, and the product cost
Can be reduced. When the parallel system is used, the data signal
And a control signal are mixed and a data carrier is sent
If the frequency is determined, search for the control signal frequency
Procedure is unnecessary, and the communication establishment procedure can be simplified.
You. Also, since there is no control signal in other channels,
Preserve the transmission speed and quality of actual data on other channels
I can. In the above example, the trunk modem
16, router 15 and center modem 14 respectively
Although they were formed separately, multiple devices were integrated into one
Of course, it is also good. Further, the server machine 19 is separately connected,
Emails between subscribers' homes (computers 11) in apartment houses 7
Transmission and reception may be performed. In other words, LAN
It becomes possible to build. In addition, manage the bulletin board,
Service that residents of apartment complex 7 can write each other
Can also be provided. According to this embodiment, a contract is made with a higher-level provider.
Lower the connection cost per terminal
Can be. Also, the router 15, the trunk line modem 16 and the like
By acting as a kind of sub-provider
Business that collects fees from each subscriber's home
It can also be deployed as In this case, the administrator
It is a management association for apartment houses,
It can be a general contractor, real estate company, etc. that manages. Mochi
Of course, various telecommunications carriers may be used separately. Then, usually, any existing apartment or tena
Even in a new building, there are already installed TV terminals,
Connect to the TV terminal, and use the existing building
You can use the equipment to connect to the Internet,
No new wiring work is required.
Change to directional amplifier 5
Internet connection, LA described above with provider
All you have to do is install each device for N connection.
Work can be done easily. In addition, construction is basically for each household and department
Internet connection is rare, since it does not have to be done indoors.
There is no inconvenience for those who do not want it, one that accompanies construction
Temporary deterioration of living environment does not occur. Further, at least one TV terminal is provided in each room.
It is well established that telephone lines are modular
-The number of installations per unit is greater than that of terminals,
Installation location restrictions are reduced as much as possible. In other words, modular
-Some rooms have no terminals, but some rooms do not have TV terminals.
It is not an exaggeration to say that a PC is set up in a room of your choice.
And an environment that can be connected to the Internet. Further, a LAN can be easily configured in the building.
Files that were shared to build the building
Can access each other using LAN,
Office buildings and tenant buildings without LAN facilities
It will be very useful. In the case of building and designing a new building,
Even with standard equipment without arranging optical cables, etc.
Connect to the Internet using a TV shared facility in a building
Connection environment and LAN environment can be provided.
・ Easy construction and cost reduction
You. According to the present invention, an existing telecommunication cable such as a coaxial cable can be used.
By utilizing the TV joint reception facility,
Internet connection and premises LAN
Communication systems can be built
But, especially, without using telephone line, coaxial cable
Without changing the existing
That three communication systems can be built using
Is a match for the age when renewal is required
It can be said that it is clear. The present invention simply utilizes existing facilities.
By just building it at low cost
Instead, the configuration as described in the claims
The transmission speed of communication information and the quality of information
It has the effect of bringing above.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual diagram showing an example of a transmission system in a building of an apartment house which is a main part of the present invention. FIG. 2 is a diagram showing an example of a used frequency band in the present invention. [Description of Signs] 1 TV antenna 2 BS / U-V amplifier 3 Mixer 4 Distributor 5 Bi-directional amplifier 6 Transmission line 7 Apartment 8 TV terminal 10 TV 11 PC 12 Upper-layer provider 14 Center modem 15 Router 16 Trunk modem 18 Terminal modem 19 Server machine

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akihiko Tanaka 4-8-33 Shibaura, Minato-ku, Tokyo Inside (72) Inventor Yosuke Kano 4-8-33 Shibaura, Minato-ku, Tokyo Sekidenko Co., Ltd. (72) Inventor Hideo Goto 4-8-33, Shibaura, Minato-ku, Tokyo In-house Seki Electric Works Co., Ltd. (72) Inventor Kazuo Saida 4-8-33, Shibaura, Minato-ku, Tokyo In-house Seki Electric Works Co., Ltd. (56) References JP-A-11-234646 (JP, A) JP-A-11-355738 (JP, A) JP-A-10-32578 (JP, A) JP-A-63-119330 (JP, A) (58) (Int.Cl. ⁷ , DB name) H04L 12/28 H04L 12/56

Claims (1)

(57) [Claims] [Claim 1] A coaxial cable laid in a large structure such as an apartment house, a building, a hotel, etc., a ridge amplifier connecting the coaxial cable and an antenna, and the coaxial cable Using an existing television shared reception facility equipped with a television terminal installed in a room in the large structure and being connected to the, if the in-building amplifier is unidirectional, replace it with a bidirectional amplifier; A mixer is connected to the upstream side of the bidirectional amplifier to establish connection with the antenna via the mixer, and the center is connected to a path different from the path connected to the antenna on the upstream side of the mixer. A device for Internet connection such as a modem and a router is connected to the premises LAN connection, and a terminal such as a personal computer and the coaxial cable are connected to the TV terminal to perform data transmission between the two. By connecting the terminal modem for centers face,
A construction method for constructing a television reception, Internet connection, and an in-building LAN system in which the terminal can connect to the Internet via the device via the coaxial cable, wherein the terminal modem is transmitted on the coaxial cable. A downlink data communication signal toward the terminal utilizes an empty frequency band not used for television broadcasting, and an uplink data communication signal transmitted on the coaxial cable transmitted from the terminal modem is the downlink data communication signal Utilizing a frequency band higher than a frequency band, the downlink data communication signal and the uplink data communication signal each perform a vacant channel among a plurality of communication channels using a communication channel, and establish and adjust a communication channel to be used. Is transmitted from the terminal modem and output from the center modem. Controlling uplink channel designation information for changing transmission information onto an uplink carrier, downlink channel designation information for determining a reception channel for receiving a downlink communication signal from the center modem, and controlling the output level strength from the terminal modem. A system for controlling the output power level by using a control signal including terminal modem management information for the center modem to constantly monitor the identification and status of each terminal modem. Television reception using the receiving equipment, Internet connection and building LAN system construction method.