JP2003032642A - Information relay device, CATV system and premises information communication system - Google Patents

Abstract

(57) [Summary] CATV that can be connected from an indoor terminal device to an external network such as the Internet via a CATV network
In the system, without impairing the aesthetics of the subscriber's home,
An object is to efficiently suppress ingress noise. SOLUTION: Each of indoor terminal devices PC1 to PC4 and an outdoor information relay device 11 (wireless LAN with IP address conversion function).
By wirelessly transmitting and receiving data between the AN access point and a built-in cable modem), each of the terminal devices PC1 to PC4 can connect to the Internet via a CATV network. Moreover, wireless L
An AN is constructed, and data can be transmitted and received between the terminal devices PC1 to PC4 via the information relay device 11. For this reason, it is not necessary to separately arrange a cable in the room for connecting to the CATV Internet, and it is possible to significantly suppress the outflow of short-wave band ingress noise to the outside due to wireless transmission.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information relay device for connecting an indoor terminal device and an external network via a CATV network, and a CATV system having the information relay device on the terminal side.

[0002]

2. Description of the Related Art Conventionally, a down line signal such as a video signal output from a CATV center and transmitted through an external (outdoor) transmission path is taken into a building (indoor) and wired indoors. A so-called two-way CA, in which the signal output from the terminal device is transmitted to a CATV center via an outdoor transmission path while being transmitted to a plurality of terminal devices via the
TV systems are known.

In this type of CATV system, a subscriber terminal device such as a set top box (hereinafter abbreviated as "STB") can receive a television broadcast by receiving a downlink signal such as a video signal, or for television broadcast. It is possible to send information such as program reservations from the subscriber side to the CATV center or connect to an external network such as the Internet by using the frequency band not used in. In particular, CA
The demand for the Internet connection via the TV network has been increasing in recent years because a high-speed connection can always be realized at a relatively low cost.

In the bidirectional CATV system as described above, noise (especially 10 to 30 MHz short-wave band) generated indoors where the subscriber is resident is also called a terminal terminal (also called a TV terminal) on the subscriber side. ) Or the like and is superposed on the indoor transmission line, and this flows out to the CATV center side as ingress noise.

The cable modem used on the terminal side when connecting to the Internet via the CATV network is ITU-
T J. Standard specifications are defined in 112 Annex B (hereinafter referred to as Annex B method), for example, 5 to 4
The specifications are set so that bidirectional data communication is performed with an upstream signal in the frequency band of 2 MHz. Therefore, it is necessary for the terminal side to be configured to be able to send the upstream signal in this frequency band to the CATV center side, whereby the ingress noise included in the frequency band of the upstream signal from the cable modem is also transmitted with the upstream signal. It is sent to the CATV center side.

Therefore, in order to prevent the ingress noise from flowing out to the CATV center side, for example, as shown in FIG. 7, there is known a method of dividing indoor wiring into one for TV signals and one for Internet. There is. FIG. 7 shows a conventional CAT.
It is explanatory drawing which shows schematic structure by the side of the terminal in V system.

That is, in a CATV system, a downlink signal from a CATV center is generally transmitted to a subscriber's home through an outdoor transmission path such as a coaxial cable, and is transmitted indoors through a protector 41. In 7, protector 4
The output (wiring) from 1 to the indoor is divided into 2 systems. One of these is pulled into the room from the wall surface near the protector 41, and a high-pass filter (hereinafter abbreviated as "HPF") 42
The signal is transmitted to the television receiver 44 through the STB 43 and the STB 43, but the other wiring does not immediately lead from the protector 41 to the inside of the room, and the cable modem 45 and the personal computer (hereinafter abbreviated as “personal computer”) 46 are installed. In addition, a coaxial cable 47 is laid along the outdoor wall up to the vicinity of the room, is pulled in from there, and is connected to the personal computer 46 via the cable modem 45.

Thus, the wiring for the Internet is
By separating the wiring for the television signal and wiring the outdoor near the terminal device, the ingress noise generated indoors is superimposed on the wiring for the Internet and the coaxial cable 47 is used.
It is possible to suppress the outflow to the CATV center side via the. Regarding the ingress noise superimposed on the television signal wiring, the HPF 42 (cutoff frequency is, for example, 70 MHz) prevents the ingress noise from flowing out.

[0009]

However, although the method of dividing the wiring from the protector 41 to the indoor into two systems like the CATV system 40 of FIG. 7 can suppress the influence of ingress noise, Besides wiring for TV signals,
It is necessary to wire the Internet wiring (coaxial cable 47) outdoors along the wall, and to make a hole in the wall near the room where the cable modem 45 is installed and pull it indoors.・ Cost increases.
Moreover, wiring along the wall outdoors also spoils the aesthetics of the subscriber's home.

The present invention has been made in view of the above problems, and in a CATV system in which an indoor terminal device can be connected to an external network such as the Internet via a CATV network, it is possible to maintain a good appearance without spoiling the aesthetics of a subscriber's home. The purpose is to efficiently suppress combined noise.

[0011]

The information relay apparatus according to claim 1 made in order to solve the above-mentioned problems, an indoor terminal device and an external network (for example, the Internet) via a CATV network. It is for connecting and relaying data transmitted and received mutually, and a wireless relay device and a cable modem are housed in a waterproof storage box and installed outdoors.

The wireless relay device relays data wirelessly transmitted from the indoor terminal device and sends the data to the external network side (CATV network), and wirelessly transmits the data transmitted from the external network via the CATV network. The cable modem is a well-known modem that is indispensable for connecting to the Internet (hereinafter referred to as "CATV Internet") via the CATV network. , Is connected between the wireless relay device and the CATV network.

As a result, the data transmitted from the external network is input to the information relay device installed outdoors, and is internally output wirelessly from the wireless relay device via the cable modem. Further, a signal wirelessly transmitted from the indoor terminal device is first received by the wireless relay device in the outdoor information relay device, and is sent to the CATV network (external network side) via the cable modem. That is, the information relay device is installed outdoors, and the data transmission and reception between the information relay device and the indoor terminal device are performed wirelessly.

Therefore, according to the information relay apparatus of the present invention,
Since it is not necessary to directly connect the indoor terminal device and the outdoor information relay device with a cable, facility construction can be facilitated without spoiling the aesthetics of the subscriber's house. Moreover, data transmission from the terminal device to the information relay device is performed wirelessly,
Since it is transmitted to the external network side via the cable modem outdoors (in the information relay device), it is possible to connect to the CATV network of the ingress noise generated in the subscriber's premises without installing special equipment to prevent the ingress noise. Can be easily and significantly reduced.

Further, since the information relay device and the indoor are not connected by wire, it is possible to prevent illegal viewing of TV broadcast (hidden TV viewing). That is, in the CATV system, it is generally possible for the subscriber to make a contract that enables both the reception of a television broadcast and the Internet connection, and it is generally possible to make a contract only for the Internet connection. The cable from the CATV center was pulled indoors for connecting to the Internet and connected to a terminal device such as a cable modem. But,
Even if you have a contract only for CATV Internet, you can use the T from the CATV center for downlink signals from the outside.
Since the V broadcast signal is also included, the subscriber imports the TV broadcast signal into a device capable of receiving the TV broadcast,
There is a possibility that the TV broadcast may be viewed illegally. Therefore, if the data transmission / reception between the outdoor information relay device and the indoor terminal device is performed wirelessly as in the present invention, such hidden TV viewing can be prevented.

Further, since it is not necessary to connect the information relay device and the indoor by wire, for example, a resident of a house in which a home joint reception system for TV broadcasting has already been constructed is
If you do not want to receive a television broadcast by ATV and want to avoid pulling the cable into the house, but want to subscribe to CATV Internet only, or the condition of the residence (for example, you can get consent to pull the cable from the housing manager in the housing complex). It is possible to respond to various requests such as when you can't pull in the cable depending on the situation (such as when there is no such thing), but you want to receive only CATV Internet service because you are in the CATV service area. You will be able to enjoy data communication services such as.

Here, as the antenna provided in the wireless relay device, any type of antenna can be used regardless of omnidirectionality or directivity, as long as good wireless transmission can be performed with an indoor terminal device. Is more preferably a directional antenna as described in claim 2. If a directional antenna is used and installed so that it is radiated with high power toward the indoor direction, for example, the radiation efficiency from the antenna can be further increased and the communicable distance can be lengthened, which is more efficient. Various data can be transmitted and received. Moreover, if an omnidirectional antenna is used, radio waves will be radiated within a predetermined range even outdoors, so it may cause some interference to outdoor electronic devices, but use a directional antenna. As a result, it is possible to reduce the radiation in directions other than indoors and suppress the influence on the outside.

Further, in the information relay device of the present invention, if the wireless relay device and the cable modem are integrally configured as described in claim 3, the amount of wiring inside the information relay device is reduced and the device housing is downsized. It is more preferable because it can be converted into Furthermore, as described in claim 4, the waterproof type storage box is configured so that a signal transmission device (for example, a protector or the like) connectable to the transmission line for transmitting the data in the CATV network is stored. This is particularly effective when it is difficult to secure a place to individually install the information relay device and the other signal transmission device, and also various types installed on the outdoor CATV transmission path. It is also possible to reduce the cost of the entire signal transmission device.

By the way, the connection with the external network using the information relay device of the present invention can be made by a terminal device independently installed indoors, but in recent years, even in general households. There is an increasing demand for providing a plurality of terminal devices so that each terminal device can be connected to an external network. In this case, there is an increasing demand for the construction of a so-called LAN that enables not only data transmission / reception between individual terminal devices and an external network but also data transmission / reception between a plurality of terminal devices. In particular, a wireless LAN capable of wirelessly transmitting and receiving data between terminal devices has attracted attention.

Therefore, for example, as described in claim 5, the wireless relay device may be an access point having a function of relaying data communication between a plurality of terminal devices installed indoors. An access point is a wireless LA
It is a well-known device used when relaying data transmission / reception between terminal devices in N. In this way, the subscriber can wirelessly connect to the external network from a plurality of indoor terminal devices, and can also transmit and receive data between the plurality of terminal devices (that is, a wireless LAN via an access point can be used). Be built), it is possible to provide more convenient system services to subscribers.

[0021] In this case, the connection from a plurality of terminal devices to the external network may be, for example, connection to the Internet. However, when a general subscriber connects to the Internet, usually, an Internet connection provider (hereinafter referred to as "ISP ( Internet Service Provider))), only one IP address (global address) is assigned.
When the P address is acquired and connected to the Internet, another terminal device cannot connect to the Internet until the IP address is returned. That is, it is not possible to simultaneously connect to the Internet from a plurality of terminal devices.

Therefore, for example, as described in claim 6, in the information relay apparatus according to claim 5, the external network is the Internet and the access point is
A NAT (Network) for converting one global IP address assigned from the Internet side into a private IP address for each terminal device so that a plurality of terminal devices can simultaneously connect to the Internet.
IP address translation function such as Address Translation) and IP masquerading (general function of so-called router)
It is good that it is equipped with.

NAT is an IP address (a source host and a destination host in a TCP / IP environment) defined by RFC1631 (one of various standards and specifications compiled by IETF, which is a standardization organization for Internet-related technologies). This is a function of converting an address for specifying, which is contained in the header part of an IP packet). More specifically, an IP address (private address) that can be used only in a closed network such as an indoor LAN.
And an IP address (global address) assigned by a public institution so that it does not duplicate for each user on the Internet
It is a function to convert between each other. IP masquerading is a function for converting addresses like NAT, and I
In addition to the P address, the TCP / UDP port number is also converted.

Therefore, according to the information relay apparatus of the sixth aspect, since it is possible to simultaneously connect to the Internet from a plurality of indoor terminal devices, it is possible for the subscriber side to install a plurality of terminal devices as needed. Become. Where CAT
For various services via V network, the above-mentioned CATV
In addition to data transmission / reception with an external network such as the Internet, there is cable transmission of TV broadcasting, which is the original purpose of CATV. Up to the vicinity of the subscriber's house, the TV broadcasting signal and the data signal from the external network have the same transmission path (for example, It is transmitted via a coaxial cable. Therefore, the information relay device of the present invention is, for example, as described in claim 7,
Of the downlink signals including the data from the external network that are input via the V network, the external network and the CATV
Downstream signals (TV broadcasting signals, etc.) output from the CATV center installed between the network and other than the above data
Is preferably provided with a downstream signal passage path for sending it to the transmission line wired indoors as it is.

With this configuration, data transmission / reception to / from the external network is performed wirelessly with the indoor terminal device, and other downlink signals other than the data are directly transmitted through the downlink signal passage route. Since it can be transmitted to an indoor transmission line, it is possible to comfortably enjoy both CATV Internet connection and TV viewing services.

When data is wirelessly transmitted / received to / from the indoor terminal device by the information relay device of the present invention, radio waves do not reach depending on the indoor structure and the distance between the information relay device and the terminal device. There is also a possibility that such communication cannot be performed. Therefore, in the case where the TV broadcast signal or the like can be transmitted to the indoor transmission line as in the invention described in claim 7 (provided with a downlink signal passage path), for example, claim 8
As described in, the wireless relay device superimposes the transmission signal wirelessly transmitted from the antenna also on the downlink signal passing path and sends it to the indoor transmission line together with other downlink signals, and from the terminal device via the transmission line. It is preferable to include a wired transmission means for inputting the upstream signal transmitted on the signal passage path to the wireless relay device.

As described above, the transmission signal including the data transmitted / received to / from the external network is wirelessly transmitted through the antenna, and at the same time, is also transmitted indoors by wire, so that the transmission signal can be appropriately set indoors. Can be taken into the terminal device (directly by wire or wirelessly), and the wireless transmission from the outside and the transmission from the indoor transmission line can be shared, and the connection from the terminal device to the external network can be made at any place indoors. It will be possible. Next, the CAT according to claim 9
A V system is provided with the information relay device according to any one of claims 1 to 8 on a terminal side, and is configured to enable data communication between an indoor terminal device and an external network via the information relay device. It was done. By constructing a CATV system using the information relay device of the present invention, the CATV system capable of suppressing the ingress noise generated indoors from flowing out to the outside (the CATV center side) requires wiring work on the subscriber side. It can be realized without reducing labor and cost, and without spoiling the aesthetics of the subscriber's home.

As already mentioned, the above-mentioned CATV
In the system, depending on the indoor structure, the position of the terminal device, and the like, there is a possibility that good communication cannot be performed because radio waves do not reach between the information relay device and the terminal device. Therefore, claim 9
The CATV system described includes, for example, as described in claim 10, the information relay device according to claim 8, and on a transmission line wired indoors, which is connected to a downlink signal passage route provided in the information relay device. Wirelessly outputs a transmission signal superimposed on a downstream signal passage path and transmitted indoors through a transmission line, and receives an upstream signal wirelessly output from a terminal device and transmits the signal via a transmission line. An antenna for sending to the information relay device side may be connected.

That is, in addition to the data transmission / reception to / from the external network by wireless transmission between the terminal device and the outdoor information relay device, an antenna is also installed on the indoor transmission line, Data is transmitted and received between a terminal device and an outdoor information relay device via an antenna.

Therefore, according to the CATV system of the tenth aspect, even when the terminal device is installed at a position other than the range where transmission / reception by the antenna of the information relay device installed outdoors is possible, Since data can be transmitted and received by the antenna, it is possible to connect to an external network and transmit and receive data between terminal devices from any place indoors.

By the way, to subscribe to the CATV service,
At the moment, not everyone is available, and depending on the residence or area of the person who wants to join, there are cases where it is not possible to join. However, by transmitting / receiving data via the information relay device of the present invention, the area (C
It is fully assumed that even people who are outside the ATV service area) can only perform data communication. In other words, even if the cable cannot be pulled in, only data communication is possible as long as the antenna can be installed within a range where the radio waves from the information relay device installed in the CATV area can reach.

As an example, it is assumed that radio waves from the information relay device reach one end of the house (for example, the tip of the balcony) but do not reach the inside of the house. In such a case, the data communication service alone can be received. It is expected that there will be needs.

Therefore, in the in-building information communication system according to claim 11, the terminal device provided inside the building is provided with the information relay apparatus according to any one of claims 1 to 6 installed outside the building. The data relay device is configured to be able to perform data communication with an external network via the data relay device. The data relay device receives data wirelessly transmitted from the information relay device and wirelessly receives data from the terminal device. To the relay antenna for transmitting to the building, the relay transmission line that is wired in the building and has one end connected to the relay antenna, and the other end of the relay transmission line that is received by the relay antenna and is transmitted over the relay transmission line. A terminal-side antenna for wirelessly transmitting the transmitted data from the information relay device to the terminal device and for receiving the data wirelessly transmitted from the terminal device and transmitting the data onto the relay transmission line, Those were example.

The terminal side antenna can be installed at any position within a range where it can be connected to the relay antenna via the relay transmission line. According to the in-building information communication system configured as described above, even if the terminal device is located in a place where data transmission / reception with the information relay device cannot be directly performed, the terminal-side antenna is provided near the terminal device. When installed, data transmission / reception with the information relay device becomes possible via the terminal side antenna, the relay transmission line, and the relay antenna.
Therefore, as long as the relay antenna can be installed in the communication area of the information relay device, data communication can be performed even if the terminal device is outside the CATV service area.

On the other hand, in a typical house, television broadcast radio waves (UHF, VHF, BS or CS broadcast radio waves, etc.)
In most cases, a so-called home joint reception system or building joint reception system is constructed so as to be equipped with an antenna for receiving a signal and transmit the reception signal from each antenna to each part (each room) in the house.

In such a case, for example, it becomes possible to construct an in-building information communication system as described in claim 12. That is, the in-building information communication system according to claim 12 comprises a receiving antenna for receiving broadcast waves, and a broadcast reception signal from the receiving antenna is transmitted through a transmission line wired in the building to the building. 7. The information relay device according to any one of claims 1 to 6, wherein the terminal device is configured to transmit to a plurality of terminal terminals in the building, and the terminal device provided in the building is installed outside the building. And is configured to enable data communication with an external network.

A relay antenna for receiving the data wirelessly transmitted from the information relay device and wirelessly transmitting the data from the front end device to the information relay device,
A relay transmission line that is wired in a building and has one end connected to a relay antenna, and an information relay device that is connected to the other end of the relay transmission line and that is received by the relay antenna and transmitted on the relay transmission line. A branch mixing unit for mixing data with a broadcast reception signal and transmitting the data to the terminal terminal on the transmission line, and for branching and outputting the data transmitted from the terminal device and transmitted on the transmission line from the transmission line to the relay transmission line. And data transmitted from the information relay device, which is connected to at least one terminal terminal and transmitted on the transmission line, to the terminal device by radio, and at the same time, the data wirelessly transmitted from the terminal device is received and transmitted. And a terminal-side antenna for transmitting on the line.

That is, by connecting the relay antenna and the transmission line for the broadcast reception signal via the relay transmission line and the branch mixing means, the transmission line from the branch mixing means to the terminal terminal side is connected to the broadcast reception signal. And for data communication. As a result, it becomes possible to construct an in-building information communication system capable of data communication by effectively utilizing the already constructed broadcast wave reception system.

However, in the system according to the eleventh or twelfth aspect of the present invention, for example, the data communication is affected by the distance between the information relay device and the relay antenna or the transmission loss from the relay antenna to the terminal side antenna in the building. May not be performed well. Therefore, for example, as described in claim 13, in the in-building information communication system according to claim 11 or 12, the data from the information relay device received by the relay antenna on the relay transmission line is amplified and the terminal device side. It is preferable to include a relay amplification means for transmitting the data from the terminal device and transmitting the amplified data to the relay antenna. As a result, even if the radio wave level from the information relay device received by the relay antenna is weak, the relay amplifier can amplify the received signal to a level sufficient for transmission to the terminal device. Therefore, it is possible to favorably perform data communication between the terminal device and the information relay device (and thus data communication between the terminal device and the external network).

The relay amplifying means not only amplifies the signal transmitted on the relay transmission line, but also has an IP address converting function like the wireless relay device provided in the information relay device according to the sixth aspect. Is more preferable.

[0041]

BEST MODE FOR CARRYING OUT THE INVENTION [First Embodiment] A preferred embodiment of the present invention will be described below with reference to the drawings. Figure 1
It is explanatory drawing which shows schematic structure of the whole CATV system of this embodiment.

As shown in FIG. 1, the CATV system 10 of this embodiment transmits the downlink signal output from the CATV center 21 to the terminal side through the trunk line 22 and the branch lines 23 and 24, and outputs the downlink signal from the terminal side. The upstream signal is transmitted to the CATV center 2 via the branch lines 23 and 24 and the main line 22.
1 is configured to be transmitted.

Although not shown, the CATV center 21 is equipped with a head end device for sending various broadcasts such as terrestrial TV broadcasts, satellite broadcasts, or data broadcasts from communication satellites to the trunk line 22 and is connected to the Internet. Various devices (router, server, etc.) for doing so are also provided. Then, various data input from the Internet is input to the headend device through various devices in the CATV center 21, and is transmitted from here to the trunk line 22 as a down signal together with other signals (such as a television broadcast signal).

Downstream signals (television broadcast signals and data signals) output from the CATV center 21 are trunk line amplifiers T.
The signal is transmitted through the main line 22 while being amplified by A or the main line branch amplifier TBA. In the main line branch amplifier TBA, the downstream signal is branched into a plurality of branch lines 23. And the trunk line branch amplifier T
The downstream signal branched by BA is further amplified by the extension amplifier EA, and then branched and output by the two branch lines 24.

A branching device (tap-off) 25 for branching the downstream signal to the subscriber's home side is installed on the branching line 24, and the branching output from this branching device 25 is the protector 41.
Is input to the information relay device 11 via. Then, of the downlink signals input to the information relay apparatus 11, data from the Internet is radiated from the directional antenna 12 (eg, Yagi antenna or collinear antenna) in a 2.4 GHz band radio wave, and other downlink signals ( TV broadcast signal etc.)
Is passed through the information relay device 11 as it is, and is transmitted to the indoor transmission line 26. The directional antenna 12 is
It is installed by adjusting the direction so that the radiation gain in the indoor direction becomes large.

The radio waves radiated from the directional antenna 12 are received by the interface cards 1a to 1c respectively provided in a plurality of indoor terminal devices (personal computers in this embodiment) PC1, PC2 and PC3. The other downlink signals are transmitted on the indoor transmission line 26, and the power supply unit 27,
It is input to the STB 43 via the TV terminal 28. Further, in this embodiment, the directional antenna 1 is indoors.
Terminal device PC located outside the communication area of 2
2.4 is transmitted as a radio wave from the directional antenna 12 in the information relay device 11 so that the data can be transmitted and received from the interface card 4 via the interface card 1d.
Indoor transmission line 2 with the GHz band signal (transmission signal) unchanged
6 is also configured to be transmitted (details will be described later),
This transmission signal is wirelessly radiated from the indoor antenna 29 connected to the television terminal 28.

Each of the interface cards 1a to 1d is used when a wireless LAN is constructed by the indoor terminals PC1 to PC4 to perform wireless data communication between the terminal devices and to connect the terminal devices PC1 to PC4 to the Internet. In addition, it is a well-known card having an antenna inside, which is used by inserting it into a predetermined slot of each of the terminal devices PC1 to PC4. Therefore, indoors each terminal device PC1 to PC
4 and the information relay device 11 construct a wireless LAN, and data transmitted and received between the terminal devices are relayed by the information relay device 11. In addition, the wireless LA of the present embodiment
N is a specification (I
EEE802.11b), using 2.4 GHz band radio waves, the modulation method is DSSS (direct spread spectrum spread spectrum), and the data access control is CSMA.
/ CA (Carrier Sense MultipleAccess / Collision Av)
oidance), which is a well-known wireless LAN.

On the other hand, the upstream signal for the Internet (2.4 GHz) wirelessly output from the indoor terminal devices PC1 to PC4 via the interface cards 1a to 1d.
The band) is taken into the information relay apparatus 11 via the directional antenna 12 or the indoor antenna 29, and is transmitted from here to the tap-off 25 side via the protector 41. And
Extension amplifier EA, trunk line branch amplifier TBA, trunk line amplifier T
The signal is amplified while being transmitted at A, and is output to the Internet via the CATV center 21.

In addition to the directional antenna 12, the information relay apparatus 11 of the present embodiment also has a non-directional standard antenna 30 (see FIG. 2A) built therein. Can also transmit and receive data, but the communicable area by the standard antenna 30 is the range shown by the solid line in FIG. 1 (the terminal device PC1 is within that area).
Therefore, with this alone, all the terminal devices PC1 to PC4 cannot transmit and receive data. Therefore, by providing the directional antenna 12 (having the communicable area shown by the one-dot chain line in the figure) separately and also providing the indoor antenna 29 (having the communicable area shown by the two-dot chain line in the figure), all terminals can be provided. The devices PC1 to PC4 are also capable of performing data communication.

The power supply unit 27 is for supplying operating power to the information relay device 11 installed outdoors, and the AC100V commercial power supplied indoors is supplied to the AC / DC converter 27a. The DC voltage is converted to DC 15V and is supplied to the information relay apparatus 11 via the coil L1 and the indoor transmission line 26. The coil L1 receives a high frequency signal from the information relay device 11 or the terminal device PC4.
The capacitor C1 is for preventing the input to the C / DC converter 27a, and the capacitor C1 is the indoor transmission line 26.
AC / D by passing only the high frequency signal transmitted above
This is to prevent the DC 15V power generated by the C converter 27a from being supplied to the television terminal 28 side.

As described above, in the CATV system 10 of the present embodiment, wireless data transmission / reception is performed between the indoor terminal devices PC1 to PC4 and the outdoor information relay device 11, whereby the terminal devices PC1 to PC4 are transmitted. Can be connected to the Internet via the information relay apparatus 11 and the CATV network. Further, when receiving a TV broadcast signal from the CATV center 21 to watch a TV broadcast, a TV receiver 44 (TV) 44 for video / audio output may be connected to the TV terminal 28 via the STB 43. .
Further, since the wireless LAN is built indoors, the information relay device 11 can be used even between the terminal devices PC1 to PC4.
It is possible to send and receive data via.

Next, the CATV system 10 of the present embodiment.
Information relay device 11 installed on the terminal side (outdoor) in
Will be described with reference to FIG. FIG. 2A is an explanatory diagram showing a schematic configuration of the information relay device 11 of the present embodiment, and FIG. 2B is a perspective view showing an outer appearance of the information relay device 11. As shown in FIG. 2A, the information relay device 11
Is mainly composed of a data relay unit 31, an HPF 42, a signal / power source separation unit 32, and branching units 33 and 34.

The data relay unit 31 is connected to the access point 3
6 and the cable modem 45 are integrally formed. Since the cable modem 45 is the same as that already described in FIG. 7, the same reference numerals as those in FIG. 7 are given and the description thereof is omitted here. . The access point 36 is a wireless LA
This is a well-known device used for relaying data transmission / reception between terminal devices in N. In the present embodiment, an Ethernet port (“Ethernet” is a registered trademark) for connecting to the Internet via the CATV network.
And an IP address conversion function represented by NAT or IP masquerade. That is, CA
An IP address (global address) included in a data signal for internet (downstream internet data) transmitted via the TV network to the terminal side and input via the branching device 33 and the cable modem 45 is used only indoors. While converting into a private address, the private address included in the data signal for the Internet (uplink Internet data) input from the terminal devices PC1 to PC4 via the directional antenna 12 is converted into a global address and output to the cable modem 45. To do.

The access point 36 is provided with the omnidirectional standard antenna 30, but in addition to this, it is also provided with the removable directional antenna 12. In the present embodiment, when the directional antenna 12 is not attached, the changeover switch 36a is switched to the standard antenna 30 side, and radio waves are transmitted and received through the standard antenna 30. When attached, the changeover switch 36a is switched to the directional antenna 12 side, and transmission and reception of radio waves via the directional antenna 12 are performed.

Further, the 2.4 GHz transmission signal output to either the standard antenna 30 or the directional antenna 12 at the access point 36 is also transmitted to the indoor transmission line 26 from the changeover switch 36a through the branching device 34. The signal is transmitted and radiated as a radio wave from the indoor antenna 29 connected to the indoor TV terminal 28 as described above. Also,
The upstream signal for the Internet output from the terminal device PC4 and received by the indoor antenna 29 is transmitted through the indoor transmission line 2
It is transmitted to the information relay apparatus 11 via 6 and is input to the access point 36 via the branching device 34.

Therefore, the downstream Internet data input via the CATV network is input to the data relay unit 31 via the branching unit 33, and then the cable modem 4 first.
Various processing such as interface conversion is performed at 5 and transmitted to the access point 36. At the access point 36, various data processing such as IP address conversion and modulation to a transmission signal in the 2.4 GHz band are performed, and directivity is obtained. Antenna 12
And transmitted to the indoor transmission line 26 side.

The upstream internet data output from each of the terminal devices PC1 to PC4 is directional antenna 1
2 is received by the indoor access line 36 (or is received by the indoor antenna 29 and received by the indoor transmission line 2).
6 and the access point 36 via the branching device 34) and is sent to the CATV center 21 side via the cable modem 45 and the branching device 33. The frequency band of the upstream internet data output from the cable modem 45 to the branching device 33 is 10 to 30 MHz in this embodiment.
Is.

The signal / power source separation section 32 is a kind of filter composed of a coil L2 and a capacitor C2,
A television broadcast signal that is transmitted indoors by blocking the DC 15V power generated by the indoor power supply unit 27 from being supplied to the HPF 42 side and supplying only the DC 15V power to the data relay unit 31. This is to prevent downstream signals such as the above from flowing out to the data relay unit 31 side. The cutoff frequency of the HPF 42 is 70 MHz in this embodiment.

The information relay apparatus 11 configured as described above actually has the data relay unit 31, the respective branching units 33 and 34, the HPF 42, and the signal / signal as shown in FIG. 2B.
The power supply separation section 32 and the wiring connecting them are all formed on one substrate 17 (details are omitted).
7 is stored in a waterproof storage box 16 for outdoor installation.

Standard antenna 3 provided in the data relay unit 31
Although not shown, 0 is also formed on this substrate 17, and the directional antenna 12 is fixed to the side surface of the waterproof storage box 16. Door 1 of waterproof storage box 16
Since the rubber packing portion 16b is formed inside 6a, if the door 16a is closed, the waterproof storage box 16 will not be flooded with water from the outside.

According to the CATV system 10 of the present embodiment described in detail above, the terminal devices PC1 to PC4 indoors and the information relay device 11 outdoors are not directly connected by a cable, but data are transmitted and received wirelessly. Therefore, the facility construction can be easily performed without spoiling the beauty of the subscriber's house, and the ingress noise generated in the subscriber's house can be easily leaked to the CATV network.
Moreover, it can be significantly reduced.

In particular, when the contract is made only for CATV Internet without watching TV, it is only necessary to install the information relay device 11 outdoors without damaging the wall of the building. It is not necessary at all, and the outflow of ingress noise can be further suppressed.
In addition, by not connecting the information relay device 11 and the interior by wire in this manner, illegal viewing of the television broadcast (hidden T
V viewing) can also be prevented.

Of the downlink signals transmitted from the CATV center 21, signals other than the downlink internet data (such as television broadcast signals) are sent to the branching devices 33, H.
Since it is directly sent to the indoor transmission line 26 via the PF 42, the signal / power source separation unit 32, and the branching device 34, CA
Both TV Internet connection and TV viewing services can be enjoyed comfortably.

Further, since the directional antenna 12 is attached to the information relay device 11 and installed so as to radiate with high power toward the indoor direction, the radiation efficiency from the antenna can be further improved and communication can be performed. The possible distance can be increased (in the present embodiment, the terminal devices PC1 to PC3 are within the receivable area), and more efficient data transmission / reception becomes possible. Moreover, it is possible to reduce radiation in directions other than indoors, and to suppress the influence on external electronic devices and the like.

Furthermore, since various devices such as the access point 36 and the cable modem 45 which constitute the information relay device 11 and wiring are mounted on one board 17, these devices are individually housed in a waterproof type. As compared with installation in the box 16, it is possible to reduce the amount of wiring inside the information relay device 11 and downsize the device housing.

In this embodiment, since the access point 36 with the IP address conversion function is used, a wireless LAN can be constructed via this access point 36 and a plurality of terminal devices can be simultaneously connected to the Internet. Accordingly, it is possible to appropriately install a plurality of terminal devices, and it is possible to provide more convenient system services to subscribers.

Since the indoor antenna 29 is installed indoors in addition to the directional antenna 12 of the information relay device 11, the terminal device is installed in a position outside the range in which transmission / reception by the directional antenna 12 is possible. Even in this case, data transmission / reception can be performed, connection from any indoor location to an external network, and data transmission / reception between terminal devices can be performed.

Here, the correspondence relationship between the constituent elements of this embodiment and the constituent elements of the present invention will be clarified. In the present embodiment, the wired transmission means of the present invention is configured by the branching device 34 and the transmission path from the branching device 34 to the access point 36, and the downlink signal input from the protector 41 side is provided inside the information relay device 11. The signal path transmitted indoors via the branching device 33, the HPF 42, the signal / power supply separating unit 32, and the branching device 34 corresponds to the downstream signal passing path of the present invention.

It is needless to say that the embodiment of the present invention is not limited to the above embodiment, and various forms can be adopted as long as they are within the technical scope of the present invention. For example, in the above-described embodiment, the operating power source of the information relay device 11 is supplied from the indoor power source unit 27, but when the commercial AC100V power source can be taken outdoors,
For example, as shown in FIG. 3, a power supply unit 5 is provided inside the information relay device.
1 may be provided, and AC 100V from the outside may be converted to DC 15V and supplied to each part of the data relay unit 31. When the outdoor AC100V power source can be taken in this way, the indoor power source unit 27 becomes unnecessary and the CATV
It is possible to reduce the proportion of various devices that configure the system 10 in the room. In addition, in consideration of the case where the AC100V power source cannot be taken from the outside, the power source unit 51
If DC15V is supplied from indoors, the DC15V
The power supply may be configured to pass through to the data relay unit 31 side as it is.

Further, the information relay device 50 shown in FIG. 3 has a protector 41 built therein. Like this, CAT
Incorporating various signal transmission devices such as protectors, which are normally connected alone on the signal transmission line in the V system, in the information relay device 50 is particularly effective when it is difficult to secure a place to install each individually. Together with CATV system 1
It is also possible to reduce the overall cost. The signal transmission device incorporated in the information relay device is not limited to the protector 41, and any device can be incorporated.

Further, in the above-described embodiment, the case where the plurality of indoor terminal devices PC1 to PC4 all exist independently without being wired to each other, but, for example, an access point is provided indoors and each terminal device is provided. PC1 to PC4 mutually transmit and receive data via this access point, and also transmit and receive data between this access point and the access point 36 included in the outdoor information relay apparatus 11 (so-called infrastructure mode wireless LA).
N) You can do it as well. Even in this case, in addition to the same effects as the above-described embodiment, a wireless LAN and a wired LAN can coexist indoors if, for example, an indoor access point equipped with an Ethernet port is used. When the terminal device is installed in a range where the radio wave of the wireless LAN does not reach, the wired LAN can be used for connection, and the usability of the subscriber can be further improved.

Further, in the above-described embodiment, the access point 36 and the cable modem 45 are integrated to form the data relay unit 31, and all the various devices and wirings configuring the information relay apparatus 11 are mounted on the board 17. However, the invention is not limited to this, and each device may be individually installed inside the waterproof storage box 16.

Furthermore, the information relay apparatus 11 of the present embodiment.
Various settings of the equipment such as the access point 36 and the cable modem 45 included in the device can be set not only by directly operating the equipment, but also from an indoor terminal device or a remote command from the CATV center 21. You can allow it.

Although the standard antenna 30 is an omnidirectional antenna, a directional antenna may be used, and the indoor antenna 29 may be an omnidirectional or directional antenna. good. Further, in the above-described embodiment, the access point 36 has the IP address conversion function so that a plurality of terminal devices can simultaneously connect to the Internet even when only one IP address is assigned. When a plurality of IP address conversion functions are assigned according to the number of IP addresses, the IP address conversion function is not always necessary. That is, whether or not to add various optional functions such as an IP address conversion function may be appropriately determined according to the contract contents of the CATV Internet contracted by the subscriber.

Furthermore, in the above embodiment, the two antennas (standard antenna 30 and directional antenna 12) of the information relay apparatus 11 are configured to use only one of the antennas by the changeover switch 36a. For example, only one of the standard antenna 30 and the directional antenna 12 may be mounted with only one mounting portion of the antenna, or both antennas 12 and 30 may be used together as a so-called diversity type antenna. You can use it. [Second Embodiment] FIG. 4 is an explanatory diagram showing a schematic configuration of a home joint reception system constructed on the terminal side in the CATV system of the present embodiment. Also in this embodiment, the information relay device 11 and the protector 41 from the information relay device 11 are also provided.
Although not shown, the entire side (up to the Internet via the CATV center 21) is exactly the same as the CATV system 10 of the first embodiment.

However, the cable (corresponding to the transmission line 26 of the first embodiment) for wired transmission to the terminal side is not connected to the information relay apparatus 11 of the present embodiment,
It is constructed to perform only data communication with the house 70a. The home cooperative reception system 70 of the present embodiment is constructed in a house 70a as shown in FIG.
Television receiving antennas 71 and 72 for receiving HF and VHF television broadcast waves and satellite receiving antennas 73 for receiving BS and CS broadcast radio waves are provided.
The received signals received at ˜73 are appropriately amplified by the booster 74, and then transmitted to each part in the house 70a via the branch mixer 77 and the transmission line 101.

A plurality of branching devices 78,
79 and 80 are connected, of which the branch output from the branch device 78 is input to the television receiver 81 via the terminal terminal 78a, and the branch output from the branch device 79 is the television receiver via the terminal terminal 79a and the STB 82. It is output to 83. Further, an indoor antenna (corresponding to the terminal side antenna of the present invention) 84 is connected to the terminal terminal 80a connected to the branching device 80, and the branch output from the branching device 80 is wirelessly transmitted from this indoor antenna 84. Sent.

The information relay device 11 is provided on the side surface of the house 70a.
A relay antenna 75 is installed at a position substantially opposite to and within the communicable area of the information relay device 11, and is connected to the branch mixer 77 via the relay transmission line 102 wired in the house 70a. Also, in the house 70a, a personal computer PC
5 and PC6, and interface cards 1e and 1 provided in each personal computer PC5 and PC6, respectively.
Data can be wirelessly transmitted / received to / from the outside via f.

In the home co-reception system 70 thus configured, the directional antenna 12 of the information relay device 11 is used.
The electric wave (data for the Internet; hereinafter also simply referred to as "data signal") transmitted from
5, and the data signal is input to the branch mixer 77 via the relay transmission line 102. This branch mixer 7
7, the data signal is mixed with reception signals of various television broadcasts, and both are transmitted to the terminal side on the transmission line 101.

Therefore, the data signal from the information relay apparatus 11 is wirelessly transmitted again by the indoor antenna 84,
When the interface card 1e receives this transmitted radio wave, a data signal is taken into the personal computer PC5. On the other hand, the data signal generated by the personal computer PC5 and wirelessly transmitted from the interface card 1e is received by the indoor antenna 84, and transmitted via the terminal terminal 80a, the branching device 80, the transmission line 101, the branching mixer 77, and the relay transmission line 102. It is transmitted to the relay antenna 75, and wirelessly transmitted again from here. The information relay device 11 transmits the radio waves transmitted by radio.
By receiving at, the data signal generated by the personal computer PC5 is transmitted to the Internet side via the protector 41 and the like. Since the personal computer PC6 exists within the communicable area with the external information relay apparatus 11, direct data transmission / reception with the information relay apparatus 11 is possible by the interface card 1f.

As described above, according to the home co-reception system 70 of the present embodiment, the relay antenna 75 is installed in the communicable area of the information relay device 11, and the relay antenna 75, the relay transmission line 102, and the branch mixing are provided. The personal computer PC5 and the information relay device 11 through the device 77, the transmission line 101, the branching device 80, the terminal terminal 80a, and the indoor antenna 84.
It is possible to send and receive data to and from (and thus connect the personal computer PC5 to the Internet).

Therefore, for example, when the user is in the CATV service area but does not want to pull the CATV cable into the house, or when only part of the house 70a is in the communicable area of the information relay device 11 as shown in FIG. Therefore, in the case where it is desired to enjoy only the data communication service at every place in the house 70a, it is more effective to construct the home shared reception system 70 as in this embodiment.

The present embodiment has been described by way of an example in which the data signal is superimposed on the transmission line 101 for transmitting the television broadcast signal and is transmitted to the terminal side. However, the present invention is not limited to this. As in the home information communication system 80 shown in FIG. 5, only the data signal may be transmitted alone.

The in-home information communication system 80 of FIG. 5 has a relay antenna 75 and an indoor antenna 8 in the house 80a.
4 is connected by relay transmission lines 103a and 103b, and an access point 76 (corresponding to the relay amplification means of the invention) functioning as a repeater is provided between the relay transmission lines 103a and 103b. ing. This access point 76 is the access point 36 of FIG.
(That is, the access point 36 with the built-in information relay device 11)
In the present embodiment, in particular, the data signal received by the relay antenna 75 is amplified and sent to the relay transmission line 103b and the transmission line 104, and the transmission lines 103b and 104 are also provided. The data signal transmitted via the relay is amplified and sent to the relay antenna 75 side. Further, since the access point 76 also has an IP address conversion function such as NAT or IP masquerade, the number of connectable personal computers viewed from the information relay apparatus 11 on the terminal side is substantially increased.

Further, the personal computers PC7 and PC8 are directly connected to the access point 76 via the transmission line 104. Thereby, a personal computer such as a personal computer PC5 capable of transmitting and receiving data via the indoor antenna 84,
A so-called wireless LAN via an access point 76 is constructed with a personal computer such as a personal computer PC7 directly connected to the transmission line 104.

It is needless to say that the same access point 76 as that shown in FIG. 5 may be provided on the relay transmission line 102 in the home joint reception system 70 shown in FIG.
By providing the access point 76, even if the radio wave transmission / reception state between the relay antenna 75 and the information relay device 11 is not preferable (for example, when the reception level at the relay antenna 75 is weak), the access point 76 is used. By relaying the data signal transmission with the terminal side, the data communication in a wider range becomes possible and the reliability of the data communication is also improved. [Third Embodiment] FIG. 6 is an explanatory diagram showing a schematic configuration of a building joint reception system constructed on the terminal side in the CATV system of the present embodiment. Also in the present embodiment, the information relay apparatus 11 and the entire protector 41 side from the information relay apparatus 11 (CATV center 2
1 to the Internet), though not shown, is exactly the same as the CATV system 10 of the first embodiment.

In the present embodiment, since the CATV network (not shown) including the CATV cable to which the information relay apparatus 11 is connected is within the range facing the building 90a across the river, the CATV to the building 90a is provided. It is assumed that the cable cannot be pulled. Although the cable cannot be pulled, the relay antenna 75 can be installed in the communicable area of the information relay device 11, and therefore only data communication is possible via the relay antenna 75.

Also in this embodiment, as in the second embodiment, the television receiving antennas 71 and 72 for receiving the UHF and VHF television broadcasting waves and the satellite receiving antenna 73 for receiving the BS and CS broadcasting radio waves are used. The various television broadcast signals received by the booster 74 are appropriately amplified by the booster 74 and then transmitted to each room in the building 90 a through the branch mixer 77, the distributor 42, and the transmission line 106. Transmission line 10
On the top of 6, there are two branch devices 93, 94, 9 for each room.
5, 96 are connected.

Then, for example, in the room 101 on the first floor, as shown in the figure, the two distributor 96 is connected to the end of the transmission line 106, and is branched to the indoor antenna 84 via the terminal terminal 96a and via the terminal terminal 96b. It is distributed and output to the mixer 97. One of the branch outputs of the branch mixer 97 (BS, CS broadcast signals) is input to the television receiver 83 via the STB 82, and the other (VHF, UHF broadcast signals).
Is directly input to the television receiver 83.

In the building shared reception system 90 of the present embodiment having the above-described configuration, as in the home shared reception system 70 of the second embodiment, the side surface of the building 90a has
A relay antenna 75 is installed at a position almost opposite to the information relay device 11 and at a position within the communicable area of the information relay device 11, and each relay transmission line 105 wired in the building 90a.
It is connected to the branch mixer 77 via a, 105b and the access point 91. In addition, 10 in the building 90a
A personal computer PC5 is provided in room No. 1, and data can be wirelessly transmitted / received to / from the outside through the interface card 1e. The access point 91 is shown in FIG.
Access point 76.

In the building reception system 90 having the above structure, the data signal transmitted from the directional antenna 12 of the information relay apparatus 11 is first received by the relay antenna 75, and the data signal is transmitted to the relay transmission line 105a and the access point. It is input to the branch mixer 77 via 91 and the relay transmission line 105b. The branch mixer 77 mixes the data signal with the received signals of various television broadcasts and transmits them together on the transmission line 106 to the terminal side.

This data signal is wirelessly transmitted again from the indoor antenna 84 in room 101, and the data signal is taken into the personal computer PC5 by receiving this transmitted radio wave at the interface card 1e. According to the present embodiment, even if the user is in the CATV service area, even if the cable cannot be pulled in due to restrictions such as location conditions of the building 90a (in this example, the existence of a river), the data Only communication can be enabled.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of an entire CATV system according to a first embodiment.

FIG. 2A is an explanatory diagram showing a schematic configuration of an information relay device of the present embodiment, and FIG. 2B is a perspective view showing an outer appearance of the information relay device.

FIG. 3 is an explanatory diagram showing another embodiment of the information relay device.

FIG. 4 is an explanatory diagram showing a schematic configuration of a home shared reception system according to a second embodiment.

FIG. 5 is an explanatory diagram showing a schematic configuration of a home information communication system.

FIG. 6 is an explanatory diagram showing a schematic configuration of a building shared reception system according to a third embodiment.

FIG. 7 is an explanatory diagram showing a schematic configuration of a terminal side in a conventional CATV system.

[Explanation of symbols]

1a to 1f ... Interface card, 10, 40 ... CA
TV system, 11, 50 ... Information relay device, 12 ... Directional antenna, 16 ... Waterproof storage box, 16a ... Door,
16b ... Rubber packing part, 17 ... Substrate, 21 ... CATV
Center, 22 ... Trunk line, 23, 24 ... Branch line, 25, 3
3, 34, 78, 79, 80, 93 ... Branching device, 26, 1
01, 104, 106 ... Transmission line, 27 ... Power supply unit,
27a ... AC / DC converter, 28 ... TV terminal, 2
9 ... Indoor antenna, 30 ... Standard antenna, 31 ... Data relay section, 32 ... Signal / power source separation section, 36, 76, 91 ...
Access point, 36a ... Changeover switch, 41 ... Security device, 42 ... HPF, 43, 82 ... STB, 44, 81,
83 ... TV receiver, 45 ... Cable modem, 46 ... PC, 47 ... Coaxial cable, 51 ... Power supply unit, 70 ... Home shared reception system, 70a ... House, 71, 72 ... TV receiving antenna, 73 ... Satellite receiving antenna, 74 ... Booster, 75 ... Relay antenna, 77, 97 ... Branch mixer, 78a-80a, 90a, 90b ... Terminal terminal, 80
… In-house information and communication system, 84… Indoor antenna, 90…
Building joint reception system, 90a ... Building, 96 ... Distributor,
102, 103a, 103b, 105a, 105b ... Relay transmission line, C1, C2 ... Capacitor, EA ... Extension amplifier, L1, L2 ... Coil, PC1-PC8 ... Terminal device,
TA: Trunk line amplifier, TBA: Trunk line branch amplifier

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shigemitsu Toriyama             80, Kamino, Asada Town, Nisshin City, Aichi Prefecture             Electric Works Co., Ltd. F-term (reference) 5C064 BA01 BA07 BB05 BC11 BC14                       BD02 BD08                 5K033 AA04 BA01 BA07 CB09 DA06                       DA17 DB18                 5K072 AA22 BB02 BB25 BB27 CC03                       EE04 GG02 GG04 GG31

Claims (14)

[Claims] 1. An information relay device for connecting an indoor terminal device and an external network via a CATV network, and relaying data transmitted and received mutually, wherein the information device wirelessly transmits the information. A wireless relay device having an antenna for relaying the data to be transmitted to the external network side and wirelessly transmitting the data transmitted from the external network via the CATV network to the terminal device; An information relay device characterized in that a cable modem connected between a wireless relay device and a CATV network is housed in a waterproof storage box for outdoor installation. 2. The information relay apparatus according to claim 1, wherein the antenna is a directional antenna. 3. The information relay apparatus according to claim 1, wherein the wireless relay device and the cable modem are integrated with each other. 4. The CATV is provided in the waterproof storage box.
The information relay apparatus according to any one of claims 1 to 3, wherein a connectable signal transmission device is housed on a transmission path for transmitting the data in the network. 5. The wireless relay device is an access point having a function of relaying data communication between a plurality of terminal devices installed indoors.
The information relay device according to any one of to 4. 6. The external network is the Internet, and the access point has one global IP assigned from the Internet side so that a plurality of the terminal devices can connect to the Internet at the same time.
I, such as NAT or IP masquerade, for converting an address into a private IP address for each terminal device
The information relay apparatus according to claim 5, further comprising a P address conversion function. 7. The external network and CATV among downlink signals including the data input via the CATV network.
A downlink signal passing path for sending a downlink signal other than the data output from a CATV center installed between the network and the transmission line wired indoors as it is, is provided. The information relay device according to claim 1. 8. The transmission signal, which is wirelessly transmitted from the antenna by the wireless relay device, is also superimposed on the downlink signal passing path and is sent to the transmission line together with the other downlink signal, and the transmission is performed from the terminal device. 8. The information relay apparatus according to claim 7, further comprising a wire transmission means for inputting an up signal transmitted to the down signal passage path via a line to the wireless relay device. 9. A CATV system comprising the information relay device according to claim 1 on a terminal side, and data communication between an indoor terminal device and an external network via the information relay device. The CATV system is characterized in that it is configured to enable. 10. The CATV system according to claim 9, wherein the information relay device is the information relay device according to claim 8, wherein the transmission line wired indoors is connected to the downlink signal passing path. Includes wirelessly outputting the transmission signal which is superimposed on the downstream signal passing path and transmitted indoors through the transmission line, and at the same time is wirelessly output from the terminal device to the information relay device. A CATV system, wherein an antenna for receiving a signal and transmitting the signal to the transmission line is connected. 11. A terminal device provided inside a building is capable of data communication with an external network via the information relay device according to any one of claims 1 to 6 installed outside the building. An in-building information communication system configured to: for receiving data wirelessly transmitted from the information relay device, and wirelessly transmitting data from the terminal device to the information relay device. A relay antenna, a relay transmission line wired in the building, one end of which is connected to the relay antenna, and another end of the relay transmission line, which is received by the relay antenna and transmitted on the relay transmission line. A terminal for wirelessly transmitting the received data from the information relay device to the terminal device, receiving the data wirelessly transmitted from the terminal device, and transmitting the data to the relay transmission line. An in-building information and communication system, which is equipped with a side antenna. 12. A reception antenna for receiving broadcast waves is provided, and a broadcast reception signal from the reception antenna is transmitted to a plurality of terminal terminals in the building through a transmission line wired in the building. The terminal device that is configured as described above and that is provided inside the building is installed outside the building.
6 is an in-building information communication system configured to enable data communication with an external network via the information relay device according to any one of 6 to 6, which is transmitted wirelessly from the information relay device. A relay antenna for receiving data and wirelessly transmitting data from the terminal device to the information relay device, and a relay transmission line wired in the building, one end of which is connected to the relay antenna, The terminal connected on the transmission line is connected to the other end of the relay transmission line, mixes data from the information relay device received by the relay antenna and transmitted on the relay transmission line with the broadcast reception signal. Branching and mixing means for transmitting the data to the terminal and for branching out the data transmitted from the terminal device and transmitted on the transmission line from the transmission line to the relay transmission line. Data transmitted from the information relay device connected to at least one of the terminal terminals and transmitted on the transmission line is wirelessly transmitted to the terminal device, and data transmitted wirelessly from the terminal device is received. And a terminal-side antenna for sending out to the transmission line. 13. On the relay transmission line, the data from the information relay device received by the relay antenna is amplified and sent to the terminal device side, and the data from the terminal device is amplified and transmitted. 13. The in-building information communication system according to claim 11 or 12, further comprising a relay amplification means for transmitting the signal to a relay antenna. 14. The relay amplifying unit assigns one global IP address assigned from the Internet side to each of the terminal devices so that a plurality of the terminal devices can simultaneously connect to the Internet via the information relay device. NAT for converting to a private IP address
14. The in-building information communication system according to claim 13, further comprising an IP address conversion function such as an IP address or an IP masquerade.