JPH0951298A - Inter-computer communication network - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an inter-computer communication network and high in speed economical which is much reception information quantity and less transmission information quantity by providing a reception antenna receiving a radio wave from a satellite to each computer and using a transmission antenna by lots of computers. SOLUTION: In the case of making communication of a computer 1 with a computer (n), the computer 1 sends a data signal with an address of the computer (n) as a destination address to a path controller 2. The path controller 2 relays the signal to a ground network channel 4 and the channel 4 is connected to a path control circuit 5 of a satellite transmission station, then the data signal is given to the path controller 5. The path controller 5 outputs the signal to a satellite transmitter 6, which sends the data signal to a still satellite 8 via a transmission antenna 7. The still satellite 8 receives the data signal and sends it to the ground channel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to 1: 1 or 1: between arbitrarily distributed computers on the ground.
The present invention relates to a network configuration method for realizing n communication at high speed and at low cost.

[0002]

2. Description of the Related Art Communication between computers has been remarkably advanced due to remarkable price reduction of the latest computers, internet technology for connecting computers with a unified protocol, and multimedia communication technology for handling still images and moving images. There is also an increasing demand for high-speed, inexpensive communication by home computers.

Conventionally, communication between arbitrary computers in a wide area is carried out directly between the computers or through a computer through a LAN.
In general, the LANs are connected to each other via a terrestrial public network such as a telephone network, a DDX network, an ISDN or a dedicated line for communication.

According to this method, when a communication network between a large number of computers distributed over a wide area such as homes is constructed, the public network has a high speed, and in the case of a leased line, the high speed is good but the traffic is small. Had an expensive side.

However, recently, communication satellite technology has advanced,
A high-speed digital communication technology using a communication satellite has been developed, and the communication capacity per transponder has been improved by about one digit as compared with the conventional analog system. At present, as shown in FIGS. 2 and 3, as an inter-computer communication network using satellite communication is known.

FIG. 2 shows that each computer for communication is provided with a transmitter / receiver for a satellite, and there is an advantage that the high speed of satellite communication can be used in both directions, but it is expensive because the function related to satellite transmission is expensive. It became a system.

FIG. 3 shows a satellite broadcasting type computer center. A large amount of data from the computer center is transmitted via a satellite, and interactive communication between the center computer and other computers is performed only by the terrestrial network. It is a thing.
This system may be a center-end type system, but it does not allow communication between arbitrary computers. In addition, since the communication path from the center computer to another computer is two paths, that is, the satellite and the ground, the route control may be complicated.

[0008]

In the future computer communication in homes, etc., remote education, video-on-demand, electronic publishing, electronic library, electronic newspaper, home shopping, various information service and various other services are considered. Has been. Most of these services have a large amount of information received at home, but have a small amount of information transmitted from home.

The problem to be solved by the present invention is to provide a high-speed and inexpensive communication network mainly for inter-computer communication in which the amount of received information is large but the amount of transmitted information is small as described above. Is.

[0010]

An inter-computer communication network according to the present invention solves the above problems and is as follows.

That is, in the computer communication network according to the present invention, a land line such as a telephone public network is used as a transmission line from each computer, and a radio wave from a satellite is used as a reception line in each computer. Use the receiving antenna to receive. In order to exchange information between these two lines, a satellite transmission station is provided for collecting the information sent from each computer via the ground line and sending it to the satellite line. That is, the receiving antenna is provided for each computer, and the transmitting antenna is shared by many computers.

As the land line, a private line, an INS line, a DDX line or the like may be used in addition to the public telephone network. In addition, L and Ethernet such as between these and the computer
You may connect through AN. In particular, the connected computer is a computer that has accumulated information such as video information, and is accessed by many other computers,
In the case of a computer that provides accumulated information to many other computers, the amount of information to be transmitted is large, so it is preferable to use a large capacity leased line. For other general computers, which mostly receive information, it is preferable to use an inexpensive telephone public network.

In the network configured as described above, the communication between the computer A and the computer B is performed as follows. From the computer A, a connection request data signal having the address of the computer B as a destination is transmitted to the ground line. This signal is collected by the satellite transmission station through the terrestrial system line, and at the satellite transmission station,
This signal is sent from the transmitting antenna to the satellite. When the satellite receives this signal, it sends it to the ground.

The receiving antenna on the ground receives this and passes it to the connected computer. The computer looks at the destination address to see if it is its own address. Accordingly, the computer B receives the connection request signal. When the computer B is in a state in which the connection can be permitted, the computer B sends a connection request permission signal to the ground line with the destination of the computer A.

This signal is collected at the satellite transmitter station through a terrestrial link and is received by computer A through the satellite link as described below. In this way, communication is performed by exchanging signals between the computers A and B.

Further, the communication from the computer A to the plurality of computers is performed as follows. A data signal having an address of group K is sent from the computer A to the ground line as a destination. This signal is collected by the satellite transmitting station through the terrestrial line, and the satellite transmitting station sends this signal from the transmitting antenna to the satellite. When the satellite receives this signal, it sends it to the ground. The receiving antenna on the ground receives this,
Hand it to the connected computer. The computer looks at the destination address to see if it is the address of the group to which it belongs. As a result, the computers belonging to group K receive this data signal.

As described above, any computer on the ground can perform 1: 1 or 1: n communication with any other computer by the inter-computer communication network according to the present invention.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIG. A computer (1) placed in each home or the like is connected to a route control device (2) that performs route control of communication data between computers. A satellite receiver (3) and a ground network line (4) are also connected to the route control device (2). The dew controller (2) outputs the data signal input from the computer to the ground network line (4) and outputs the data signal input from the satellite receiver (3) to the computer (1). The connection configuration of the other computers is the same, and although FIG. 1 shows the case of three computers, the same applies to any number of computers. On the other hand, the satellite transmission station has a route control device (5) for connecting a plurality of terrestrial network lines from each computer, which is connected to the satellite transmitter (6). The route control device (5) outputs the data signal input from the ground network line to the satellite transmitter (6). The data signal transmitted from the satellite transmitter (6) is received by the geostationary satellite (8) via the transmitting antenna (7), and the geostationary satellite (8) transmits this data signal toward the ground. All receiving antennas, including the receiving antenna (9) on the ground, are arranged to receive this signal. As a line of the terrestrial network, a public telephone network, a private line, an INS line, a DDX line, etc. are appropriately selected and configured.

Communication is performed as follows by the inter-computer communication network shown above.

Computer (1) is computer (n)
When communicating with, the computer (1) sends a data signal to which the address of the computer (n) is added as the destination address to the route control device (2). The route control device (2) relays this to the terrestrial network line (4), and the terrestrial network line (4) is connected to the route control device (5) of the satellite transmitting station so that this data signal is It is input to the road controller (5). The route control device (5) outputs this to the satellite transmitter (6), and the satellite transmitter (6) sends this data signal to the geostationary satellite (8) via the transmitting antenna (7). The geostationary satellite (8) receives this data signal and sends it to the ground.

The terrestrial receiving antenna connected to the computer (n) receives this and sends this data signal to the route controller connected to the computer (n) via the connected satellite receiver. . The route controller sends this data signal to the computer (n). The computer (n) receives this signal and receives it by matching its destination address with its own address. The communication from the computer (n) to the computer (1) is similarly performed. That is, the computer (n) sends a data signal to which the address of the computer (1) is added as the destination address to the route control device connected to the computer (n). Thereafter, this data signal follows the same route as described above and reaches the computer (1), and the computer (1) receives the data signal when the destination address matches its own address.

The above is the case of 1: 1 communication, but 1: n
That is, in the case of communication with multiple destinations, by transmitting a data signal with an address indicating a group as the destination address, all the computers belonging to this group can receive this data signal by one transmission. it can. For example, when the computer (1) communicates with a group of computers belonging to the group address K, the computer (1) sends a data signal having the group address K as a destination address to the route control device (2). Thereafter, this data signal follows the path shown above and reaches all computers on the ground. Each computer checks whether the destination address of this data signal matches the group address to which it belongs, which it holds in advance, and if it matches, receives it. As a result, all the computers belonging to the group address K receive this data signal.

In the above-described embodiments, all the computers, once accommodating all the data signals transmitted from the satellites, look at the destination address and see only their own address or the group address to which they belong. Receive, but register your address or the group address to which you belong to the route controller or satellite receiver to which the computer is connected, and send it from the satellite at the route controller or satellite receiver. It is also possible to check the destination of the incoming data signal and send only the data signal matching the registered one to the computer. This reduces the load on the computer. In addition, by registering this address from a computer so that it can be registered and deleted at any time, even a data signal transmitted at a certain group address will be constant from a certain time on a certain day. It is possible to flexibly perform the reception control such that the time is received but the other times are not received.

[0024]

The computer-to-computer communication network according to the present invention is economical and short-time, as compared with the case of transmitting a large amount of information in a broadcast type, in particular, the case of a conventional network composed only of terrestrial systems. Can be configured. Further, as compared with the network of FIG. 3 having the same effect, 1: 1 communication between arbitrary computers is possible, and the route control is extremely simple, so that the system can be easily constructed.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a conventional technique.

FIG. 3 is a diagram showing another conventional technique.

[Explanation of symbols]

 1 computer 2, 5 direction controller 3 satellite receiver 4 ground network line 6 satellite transmitter 7 transmitting antenna 8 geostationary satellite 9 receiving antenna

Claims (1)

[Claims] 1. In a communication network between a plurality of computer sites, each computer site has a receiving antenna for receiving a wireless data signal, and is coupled to the receiving antenna to convert the received signal into a data signal that can be input to a computer. A first person connecting a receiver, a computer, and the computer and the receiver to a line of the ground network, and inputting a data signal from the receiver to the computer and transmitting a data signal from the computer to the line of the ground network A wireless transmission station which has a road controller and is connected to each computer site via the terrestrial network line and a wireless line, and the wireless transmission station is sent to each computer site via the terrestrial network line. Second route controller for relaying the data signal from the transmitter to the transmitter, and the output of the transmitter for each via a wireless line. And a transmitting antenna for transmitting the computer site, inter-computer communication network, characterized in that.