JPH0964937A - Communication controller, communication control method and communication system using the controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize channels by sending incoming and outgoing communication data through separate channels with a simple configuration and controlling the path thereby solving a problem of unbalance of incoming and outgoing data communication amounts. SOLUTION: A 1st address denoting a destination address in a call protocol to the destination using a 1st channel using a subscriber telephone network 30 and a 2nd address denoting its own address using a 2nd channel of a communication satellite 40 are designated, and a 1st path via the 1st channel is formed by the designated 1st address for incoming communication to the destination and a 2nd path via a 2nd channel by the 2nd address is formed to make outgoing communication from the destination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication control device, a communication control method, and a communication system using the communication control device, in which a client or the like communicates with a server or the like by utilizing the Internet or the like. The present invention relates to a communication control device, a communication control method, and a communication system using the communication control device, which are suitable for communication in which the amount of data transmitted in one call is significantly different from the amount of data transmitted in the downlink.

[0002]

2. Description of the Related Art In recent years, the use of the Internet has dramatically increased. In particular, with the development of mosaic methods, photographic methods, geometric methods, etc., which are image encoding methods, the spread of database access services in the client and server formats has been remarkable.

By the way, in the database access service in the client / server format, the transfer data amount of the upstream communication from the client to the server is small, whereas the transfer data amount of the downstream communication from the server to the client is small. There is a problem that the communication amount is unbalanced, which is extremely large, which is not preferable in terms of effective use of the line.

This tendency is further promoted as the transfer of image and voice data increases with the transfer data becoming multimedia.

[0005]

As described above, when constructing a communication system for receiving a database access service in the form of a client and a server using the Internet, the transfer data amount of the upstream communication from the client to the server and There is a problem that the line cannot be effectively used due to the imbalance between the amount of communication in the upstream and the amount of data transferred in the downstream from the server to the client.

Therefore, in order to make effective use of the line, it is considered to separate the uplink and downlink lines.
Currently, in one call with call setup, that is, the data transmission / reception format is not a broadcast format, and an ACK is sent for one call.
There is no way to easily route the uplink and downlink as separate lines in a communication format in which communication is performed by confirming with (acknowledgement) and NACK (negative acknowledgment).

That is, the client subscriber line has the same uplink and downlink lines, and there is no conventional method for simply controlling the uplink and downlink of the client subscriber line as separate lines. However, the problem of unbalance could not be solved, and it was not preferable from the viewpoint of effective use of the line.

Therefore, according to the present invention, the uplink and downlink of communication data can be routed as separate lines with a simple structure, and the problem of imbalance in the communication amount of the uplink and downlink data can be solved thereby. It is an object of the present invention to provide a communication control device, a communication control method, and a communication system using the communication control device, which enables effective use of the communication control device.

[0009]

In order to achieve the above object, the present invention communicates with a first line that performs communication at a first communication speed and a second communication speed that is faster than the first communication speed. Communication control for accommodating a second line for performing data transmission and reception, for accommodating the first line and the second line, and for transmitting and receiving data to and from a second server connected to the Internet network having the first server In the device, the second line from the own device via the first server using the first line
Address setting means for setting the address of the second server as a destination address and setting an address via the second line as a source address when setting up a call to the second server, and from the second server to its own device. A route for determining the route for connecting the second server to the own device via the Internet network and the second line by the address through the second line set by the address designating means in the data transmission of It is characterized by comprising a determining means and a data transmitting means for transmitting data from the second server to the own device by the route through the second line determined by the route determining means.

Also, the present invention accommodates a telephone line for performing communication at a first communication speed and a satellite line for performing communication at a second communication speed higher than the first communication speed, and the telephone line and In a communication control device for accommodating the satellite line and transmitting / receiving data to / from a second server connected to an internet network having a first server, the communication control device uses the telephone line from the own device to pass through the first server. When setting the call to the second server, the address of the second server is set as the destination address, and the address specifying means for specifying the address via the satellite line as the source address, and the second server itself. When transmitting data to the second server, the second server is set up by the address via the satellite line set by the address designating means. Data transmission from the second server to the own device by an internet network, a route determining means for determining a route to connect to the own device via the satellite line, and a route via the satellite line determined by the route determining means. And a data transmission means for performing the above.

Also, the present invention accommodates a telephone line for performing communication at a first communication speed and a satellite line for performing communication at a second communication speed higher than the first communication speed, and the telephone line and In a communication control device for accommodating the satellite line and transmitting / receiving data to / from a second server connected to an internet network having a first server, the communication control device uses the telephone line from the own device to pass through the first server. When setting a call to the second server, the address of the second server is set as a destination address, and an address designating unit for designating a self address or another address via the satellite line as a source address, and the second At the time of data transmission from the server to the own device, the first number is set by the address via the satellite line set by the address designating means. The server the Internet network,
Data for transmitting data from the second server to the own device by a route determining means for determining a route connecting to the own device via the satellite line, and a route via the satellite line determined by the route determining means. And a transmission means.

According to the present invention, a first line for communicating at a first communication speed and a second line faster than the first communication speed are provided.
In a communication control device accommodating a second line that communicates at a communication speed of 1, the first address indicating the address of the other party in the calling procedure for the other party using the first line and the second line. Addressing means for designating a second address indicating its own address, using the first address designated by the addressing means, and a first route through the first line. Is formed to perform upstream communication with the other party, and
Is used to form a second path through the second line to perform downlink communication from the other party.

Further, the present invention is a communication control device for accommodating a telephone line for performing communication at a first communication speed and a satellite line for performing communication at a second communication speed higher than the first communication speed, Addressing means for designating a first address indicating the address of the other party and a second address indicating the own address using the satellite circuit in the calling procedure for the other party using the telephone line, A first route via the telephone line is formed by the first address designated by the address designating means to perform upstream communication with the other party, and a second route via the satellite line is established by the second address. It is characterized in that the second communication path is formed and downlink communication is performed from the other party.

The present invention also includes a client that accommodates a telephone line that communicates at a first communication speed and a satellite line that communicates at a second communication speed that is faster than the first communication speed, and the telephone. In a communication system including an internet network that accommodates a line and the satellite line and has a first server, and a second server connected to the internet network, the client uses the telephone line to use the telephone line. When setting a call to the second server via the first server, the address of the second server is set as a destination address, and an address specifying means for specifying an address via the satellite line as a source address; When the data is transmitted from the server to the client, it is set by the addressing means. Route determining means for determining a route for connecting the second server to the client via the satellite network via the satellite network by an address via the satellite line, and route via the satellite line determined by the route determining means. Data transmission means for transmitting data from the second server to the client according to
It is characterized by including.

Further, according to the present invention, a first line for communicating at a first communication speed and a second line faster than the first communication speed are provided.
A client that accommodates a second line that communicates at a communication speed of 1, a network that accommodates the first line and the second line and that has a first server, and a second network connected to the network. In the communication system including the server, the address of the second server is set as a destination address when a call is set up from the client to the second server via the first server using the first line. In addition, address designating means for designating an address via the second line as a source address, and the second line set by the address designating means at the time of data transmission from the second server to the client. Address via the second server via the network, the second line via the Route determining means for determining a route connecting to the client, and data transmitting means for performing data transmission from the second server to the client by the route via the second line determined by the route determining means. It is characterized by having.

According to the present invention, a first line for performing communication at a first communication speed and a second line faster than the first communication speed are provided.
In a communication control method for performing communication between a client accommodating a second line that performs communication at a communication speed of 10 and a server connected to an Internet network that accommodates the first line and the second line A first step of connecting the client to the Internet network via the first line; a first address indicating the address of the server from the client to the Internet network; and a second line. The second step of designating a second address indicating the address of the client used, and connecting the client to the server via the Internet network using the first address to connect the first line. Forming a first upstream communication path, and using the second address, the second downstream communication via the second line. A third step of forming a tract,
A fourth step of transmitting a data transfer request from the client to the server via the first communication path, and data read from the server in response to the data transfer request to the second communication path. Fifth to send via
And the steps of.

The present invention also includes a client that accommodates a telephone line that communicates at a first communication speed and a satellite line that communicates at a communication speed faster than the first communication speed.
In a communication control method for communicating with a server connected to an internet network accommodating the telephone line and the satellite line, a first step of connecting the client to the internet network via the telephone line,
A second step of designating from the client to the Internet network a first address indicating the address of the server and a second address indicating the address of the client using the satellite line; and the first address. Is used to connect the client to the server via the Internet network to form an upstream first communication path via the telephone line, and use the second address to connect to the downlink via the satellite line. Corresponding to the third step of forming a second communication path, the fourth step of transmitting a data transfer request from the client to the server via the first communication path, and the data transfer request. And a step of transmitting the data read from the server via the second communication path.

The present invention also includes a client that accommodates a telephone line that communicates at a first communication speed and a satellite line that communicates at a communication speed faster than the first communication speed.
In a communication control method for communicating with a server connected to an internet network accommodating the telephone line and the satellite line, a first step of connecting the client to the internet network via the telephone line,
A second step of designating a first address indicating the address of the server from the client to the Internet network and a second address designating the self or another address via the satellite line; and the first step. An address is used to connect the client to the server via the Internet network to form an upstream first communication path via the telephone line, and a downlink is used via the satellite line using the second address. Corresponding to the third step of forming a second communication path of the above, a fourth step of transmitting a data transfer request from the client to the server via the first communication path, and the data transfer request. And a fifth step of transmitting the data read from the server via the second communication path.

Further, according to the present invention, a first line for communicating at a first communication speed and a second line faster than the first communication speed are provided.
A communication control method for performing communication between a client that accommodates a second line that performs communication at a communication speed of, and a server that is connected to a network that accommodates the first line and the second line, The client is the first
A first step of connecting to the network via the line, and a first address indicating from the client to the network the address of the server, and a second address indicating the address of the client using the second line. A second step of designating two addresses, and using the first address to connect the client to the server via the network to form an upstream first communication path via the first line. In addition, the third step of forming a second downlink communication path via the second line using the second address, and the client to the server via the first communication path. And transmitting the data read request from the server in response to the data transfer request via the second communication path. Characterized by comprising a fifth step of sending, the Te.

The present invention further includes a client that accommodates a telephone line that communicates at a first communication speed and a satellite line that communicates at a second communication speed that is faster than the first communication speed, and the telephone. In a communication control method for communicating between a network and a server connected to a network accommodating the satellite circuit, a first step of connecting the client to the network via the telephone line, A second step of designating to the network a first address indicating the address of the server and a second address indicating the address of the client using the satellite line; and the client using the first address. Is connected to the server via the network to form an upstream first communication path via the telephone line. At the same time, a third step of forming a second downlink communication path via the satellite line using the second address, and data from the client to the server via the first communication path. It comprises a fourth step of transmitting a transfer request, and a fifth step of transmitting the data read from the server in response to the data transfer request via the second communication path. To do.

In the communication control device of the present invention, the address designating means uses the first line to indicate the address of the other party in the calling procedure for the other party and the own address using the second line. And a second address indicating that the first address designated by the address designating means forms a first route through the first line to perform upstream communication with the other party and A second route via the second line is formed by the address, and downlink communication from the other party is performed.

Here, the first line may be a wired telephone line, and the second line may be a wireless satellite line.

Further, the address designating means may be constructed so as to designate the second address in a calling procedure to a destination using a communication protocol of a transport layer of the Internet network.

Further, in the communication control device of the present invention, the address designating means causes the address of the second server as a destination address when the call is set up from the client to the second server via the first server using the first line. Is set, and an address via the second line is designated as the source address, and when the data is transmitted from the second server to the client by the route determining means, the data is transmitted via the second line set by the address designating means. The route for connecting the second server to the client via the Internet and the second line is determined by the address, and the second determined by the route determining unit by the data transmitting unit.
Data is transmitted from the second server to the client by the route through the line.

Further, in the communication control method of the present invention, the client is connected to the Internet network via the first line, and then the client sends the first address and the second address indicating the server address to the Internet network. A second address indicating the address of the client using the line is designated, the client is connected to the server through the Internet network using the first address, and the first upstream communication is performed through the first line. Forming a path and second
Form a downstream second communication path via the second line, and then send a data transfer request from the client to the server via the first communication path,
The data read from the server in response to this data transfer request is transmitted via the second communication path.

Here, the first line can be composed of a wire telephone line, and the second line can be composed of a wireless satellite line.

The designation of the first address and the second address can be configured by a calling procedure using a communication protocol of the transport layer of the Internet network.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a communication control device, a communication control method and a communication system according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a communication control device according to the present invention.
1 shows a schematic configuration of an embodiment of a communication control method and a communication system.

In the embodiment shown in FIG. 1, the mosaic system is adopted as the image encoding system on the receiving side, and the dial-up IP connection client 10 (communication control device) using the telephone network is arranged on the Internet network 21. At the same time, the WWW (World Wi
de Web) server 20 is provided, and a data transfer service from the WWW server 20 is received in response to a data transfer request from the client 10, that is, a database access service in a so-called client / server format is received.

Here, the Internet network 21 has a PP
A P (Point to Point Protocol) server 21a is provided, a WWW server 20 is connected, and a satellite adapter (S) 22 and a satellite broadcasting transmitting station 23 for connecting to a communication satellite 40 that performs satellite broadcasting are provided. Has been.

Further, the client 10 is provided with the PPP server 21 of the Internet network 21 via the subscriber telephone network 30.
A modem 11 for connecting to a is provided, and an antenna tuner 15, a descrambler 14, a satellite adapter (R) 13, and an Ethernet 12 for receiving the data transmitted by the communication satellite 40 are provided. There is.

Before describing the detailed operation of the embodiment shown in FIG. 1, the basic principle of the present invention will be described.

As described above, in the database access service in the client / server format,
Generally, the amount of transfer data for upstream communication from the client to the server is small, but the amount of transfer data for downstream communication from the server to the client is large.

Therefore, in the present invention, one client has two subscriber lines of low speed and high speed.
In one call, a low-speed subscriber line is allocated to the upstream communication from the client to the server with a small amount of transferred data, and a high-speed subscriber line is allocated to the downstream communication from the server to the client with a large amount of transferred data. Control the communication path.

Specifically, a telephone line is used as a low-speed subscriber line used for upstream communication from the client to the server, and a communication satellite is used as high-speed subscriber line used for downstream communication from the server to the client. Use a satellite line that uses. Here, the data transmission speed of the telephone line is low, for example, 28.8 kbps, but the data transmission speed of the satellite line is high, for example, 150 kbps, so that a large amount of data from the server to the client can be transmitted at high speed. Therefore, it is possible to solve the problem that the line cannot be effectively used due to the imbalance between the upstream and downstream traffic.

Since the satellite line adopts a so-called broadcasting format and can be shared with other clients, the total cost of the subscriber line of the system does not become so high.

FIG. 2 shows, in principle, the schematic configuration of the present invention constructed on the basis of the above idea, corresponding to FIG.

In the configuration shown in FIG. 2, the client 10 of the dial-up IP connection using the telephone network makes a data transfer request to the WWW server 20 connected via the Internet network 21 to access the database in the client / server format. You will receive the service.

Here, the data transfer request from the client 10 to the WWW server 20 is made through the telephone line 30a using the telephone network and the Internet network 21. Then, the client 10 from the WWW server 20
Data is transmitted to and from the Internet network 21 and a satellite line 40a using a communication satellite.

By the way, in the Internet network 21, TC
P / IP (Transmission Control Protocol / Internet P
Figure 3 shows the protocol stack for communication using rotocol).
It is shown as follows.

That is, this protocol stack has a physical layer, a data link layer, a network layer, and a transport layer. The physical layer includes protocols relating to Ethernet, leased line, public line, etc., and the data link layer is M.
AC (Media Access Control) layer, PPP (Point
to Point Protocol), SLIP (Serial Line Interf)
ACE Protocol) and IP (Inte
rnet Protocol) and TCP for the transport layer
(Transmission Control Protocol), and various applications are provided on this transport layer via “socket”.

Here, the MAC layer has a function of controlling the transmission right so that frames sent by various nodes do not collide with each other, and the PPP has a function of identifying a higher protocol in order to use IP on the leased line. Is a data link protocol for multi-protocol, SLIP is a protocol for using IP on an asynchronous line, and "socket" is an AIP (Applicatio) for providing a transport layer function to an application program.
n Program Interface).

By the way, in the communication control apparatus and method of the present invention, the control of the upstream and downstream communication paths is controlled by the TC.
This is realized by adding functions to an application program that uses the P communication protocol.

That is, in the present invention, the client 1
In the application program on the 0 side, the calling procedure when using the TCP communication protocol of the transport layer is changed from the conventional procedure shown in FIG. 4 to the procedure shown in FIG.

In the conventional procedure shown in FIG. 4, the client 10 first creates a socket (step 101) and then calls "connect" to set a connection (step 103). This establishes a call connection between the client 10 and the server 20.

Here, a destination (destination) address and a source (source) address are required to execute the connection. The destination address is specified by an argument of "connect" by the application program, and the source address is TCP. In the / IP protocol program, the address of the subscriber line to be actually used for upstream communication is automatically set. That is, TCP / IP
In the protocol, the source address sent from the client 10 is used as the destination address in the downlink communication from the server 20, so that the downlink communication from the server 20 uses the same subscriber line as the uplink communication. .

Next, the client 10 calls "write" to send a data transfer request (step 104),
Next, "read" is called to receive the transfer data from the server 20 (step 105).

When the reception of the transfer data from the server 20 is completed, "close" is called to terminate the call connection, release the socket, release the connection (step 106), and terminate this database access service processing. To do.

As described above, in the conventional procedure, the downlink communication from the server 20 uses the same subscriber line as the uplink communication, and the line cannot be effectively used.

On the other hand, in the communication control apparatus and method of the present invention, the conventional procedure shown in FIG. 4 is changed to the procedure shown in FIG.

In the procedure adopted in the communication control apparatus and method of the present invention shown in FIG. 5, step 1 shown in FIG.
After the socket (socket) generation processing of 01, "bind" is called to use the satellite line 40 as the address of the own client 10 for the socket (socket) in downlink communication.
The processing for designating the address of the subscriber line using a is performed.

That is, in the procedure of the present invention shown in FIG. 5, first, a socket is generated (step 2).
01), then call "bind" to socket
The address of the subscriber line using the satellite line 40a used in the downlink communication is designated as the address of the own client 10 for (step 202).

Then, "connect" is called to set a connection (step 203). In this case, the destination address is set as in the conventional procedure, but the source address is set to "bind" in step 202 above.
Follow the specifications in. That is, the source address in this case is not the address corresponding to the subscriber line actually used in the up communication like the conventional procedure shown in FIG. 4, but the subscriber using the satellite line 40a used in the down communication. The line address is specified. For this reason, the downstream communication from the server 20 uses a subscriber line different from the upstream communication to the server 20.

Next, the client 10 calls "write" to send a data transfer request (step 204),
Next, "read" is called to receive the transfer data from the server 20 (step 205).

When the reception of the transfer data from the server 20 is completed, "close" is called to terminate the call connection, release the socket, release the connection (step 206), and terminate this database access service processing. To do.

As described above, in the communication control apparatus and method of the present invention, the addition of "bind" allows the client 10
When data is transmitted from the server 20 to the server 20, the address of the subscriber line for upstream communication is set as the source address instead of the address of the subscriber line for upstream communication. It is possible to perform route control as a separate line for going up and down.

In the above description, control of the upstream and downstream communication paths is realized by adding a function to the application program using the TCP communication protocol. However, when data is sent from the client 10 to the server 20, Instead of the address of the subscriber line for upstream communication as the source address, the process of setting the address of another subscriber line for downstream communication can be realized by adding the function of the TCP / IP protocol program.

Returning to FIG. 1, in the communication system of the embodiment constructed by using the communication control apparatus and method according to the present invention shown in FIG. 1, the header shown in FIG. 6 is adopted as the header of the TCP / IP communication protocol. .

In other words, TCP / employed in this embodiment
The header of the IP communication protocol has an IP header part and a TCP header part, and the IP header part includes a source IP address and a destination IP address. Here, as the source IP address, the address of the subscriber line using the satellite line 40a used in the above-mentioned downlink communication, that is, the address of the subscriber line using the communication satellite 40 shown in FIG. 1 is designated.

Here, the IP address of the WWW server 20 is the network address "A" and the host address "m".
"A + m", and the IP address of the upstream subscriber line of the client 10 is the network address "B".
And "B + n" consisting of the host address "n",
The IP address of the downstream subscriber line of the client 10 consists of "C + l" which is composed of the network address "C" and the host address "l".

By the way, in FIG. 1, the client 1
Reference numeral 0 denotes a computer, for example, a workstation or a personal computer, and the Internet network 2
The dial-up IP connection to 1 is performed by using the modem 11 and connecting to the PPP server 21a of the Internet network 21 via the subscriber telephone network 30.

The reception from the communication satellite 40 in the client 10 is performed by the antenna tuner 15, the descrambler 14, the satellite adapter (R) 13, the Ethernet 1
It is done via 2.

The client 10 is added with a function so that the application program (the mosaic program in this embodiment) uses the satellite line using the communication satellite 40 as the downlink subscriber line from the WWW server 20. ing.

Specifically, 1) In the system call calling procedure, a process of performing "bind" is added before "connect". 2) In "bind", the IP address of the source (source) is used as the downlink subscriber line, That is, a function is added to specify the IP address "C + 1" of the satellite line using the communication satellite 40.

Further, as described above, the PPP server 21a and the WWW server 20 are connected to the Internet network 21 as existing Internet network equipment, and the Internet network 21 is further connected to a satellite line using the communication satellite 40. A satellite adapter (S) 22 for connection is connected.

The satellite adapter (S) 22 is assigned a network address "C" indicating a satellite line using the communication satellite 40 as an IP address, and an IP datagram having the same network address "C" in the Internet network 21. If there is, there is an IP router function for sending it to the satellite broadcasting station 23 and this IP datagram for the communication satellite 40.
With a protocol conversion function to put on the satellite line using.

The satellite broadcast transmitting station 23 puts the data from the satellite adapter (S) 22 on a part of the broadcast radio wave and transmits it to the antenna tuner 15 at various places via the communication satellite 40.

The satellite adapter (R) 13 is assigned a network address “C” indicating a satellite line using the communication satellite 40 as an IP address, and selects from among the radio waves received via the antenna tuner 15 and the descrambler 14. A function of extracting a host under its own, for example, an IP address destined to the client 10 in the case of FIG. 1, in this case, an IP datagram having an IP address “C + 1”, and transferring it to the client 10 via the Ethernet 12.
It has a protocol conversion function for converting the IP datagram from the satellite line using the communication satellite 40 so as to be compatible with the Ethernet 12.

In FIG. 7, the client 10 shown in FIG.
It shows a signal and a data sequence between the client 10 and the WWW server 20 when the WWW server 20 is accessed after the connection to the PP server 21a and the data transfer such as the home page is received.

In FIG. 7, first, the client 10
Connects to the PPP server 21a of the Internet network 21 via the modem 11 and the subscriber telephone network 30 using the IP address "B + n" (step 301). Next, the client 10 is the PPP server 21 of the Internet network 21.
A call (connection) is set to the WWW server 20 connected to the Internet network 21 via a (step 30).
2, 303).

At this time, 1) the destination IP address is “A + m”, and 2) the source IP address is “B + n” via the telephone line using the subscriber telephone network 30, but by the above-mentioned “bind” processing. Sender I
“C + 1” via the satellite line using the communication satellite 40 is set as the P address.

Next, the client 10 sends a data transfer request such as a home page to the WWW server 20 via the PPP server 21a of the internet 21 via the telephone line (steps 304, 305).

Upon receiving this data transfer request, the WWW server 20 responds to this by sending the IP address "C + 1".
Data 1 is sent to the destination (step 30
6).

Since the Internet network 21 routes the route based on the IP address "C + 1",
This data 1 is sent to the client 10 via a satellite line using the satellite broadcast transmitting station 23 and the communication satellite 40 (step 307).

When the client 10 receives the data 1 from the WWW server 20, the client 10 sends an ACK to the PP of the Internet network 21 via the telephone line using the subscriber telephone network 30.
It is returned to the WWW server 20 via the P server 21a (steps 308 and 309).

When the WWW server 20 receives this ACK, the data 2 is addressed to the IP address "C + 1" as the destination.
Is transmitted (step 310).

In this case also, in the Internet network 21, I
Since the route is routed based on the P address "C + 1", this data 2 is stored in the satellite broadcast transmitting station 23 and the communication satellite 40.
Is sent to the client 10 via the satellite line using (step 311).

Then, the client 10 receiving this data 2 sends ACK to the PPP server 21a of the Internet network 21 via the telephone line using the subscriber telephone network 30.
Via WWW server 20 (step 31)
2, 313).

The above operation is repeated until the transfer of the data from the WWW server 20 to the client 10 is completed, and when the transfer of the data from the WWW server 20 to the client 10 is completed, the client 10 sends the data to the Internet through the telephone line. "Call (connection) release" is sent to the WWW server 20 via the PPP server 21a of 21 (steps 314 and 315). This makes W
The connection with the WW server 20 is released.

After that, the client 10 sends "P" to the PPP server of the Internet network 21 via the subscriber telephone network 30.
Release PP Server "(step 316) to end this signal and data sequence.

[0082]

As described above, according to the present invention,
In the calling procedure for the destination using the first line, the first address indicating the address of the destination and the second address indicating the own address using the second line are designated, and the designated first 1 via the first line with an address of 1
Is configured to perform the upstream communication with the other party and to form the second route via the second line with the second address to perform the downstream communication from the other party. It is said that the uplink and downlink of communication data can be routed as separate lines with a simple configuration, which can solve the problem of imbalance in the communication volume of uplink and downlink data and achieve effective use of the line. Produce an effect.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a schematic configuration of an embodiment of a communication system configured by using a communication control device and method according to the present invention.

FIG. 2 is a block diagram showing in principle the communication system shown in FIG.

[FIG. 3] TCP / IP (Transmission Control Protocol)
A diagram showing a protocol stack for communication using l / Internet Protocol).

4 is a flowchart showing a conventional calling procedure when using the TCP communication protocol in the application program on the client side shown in FIG.

5 is a flowchart showing a calling procedure adopted in the present invention when using the TCP communication protocol in the application program on the client side shown in FIG.

6 is a diagram showing an example of a header of a TCP / IP communication protocol adopted in the embodiment shown in FIG.

FIG. 7 is a dial-up I client shown in FIG.
After connecting P and connecting to the PPP server of the Internet network,
The sequence chart which shows the signal and data between a client and a WWW server when accessing a WWW server and receiving data transfer, such as a homepage.

[Explanation of symbols]

 10 Client 11 Modem 12 Ethernet 13 Satellite Adapter (R) 14 Descrambler 15 Antenna Tuner 20 WWW Server 21 Internet Network 21a PPP Server 22 Satellite Adapter (S) 23 Satellite Broadcasting Station 30 Subscribed Telephone Network 40 Communication Satellite

Claims (14)

[Claims] 1. A first line for performing communication at a first communication speed and a second line for performing communication at a second communication speed higher than the first communication speed are accommodated, and the first line is provided. A communication control device for accommodating a line and the second line and for transmitting and receiving data to and from a second server connected to an internet network having a first server, wherein Address setting means for setting the address of the second server as a destination address when setting a call to the second server via the first server, and designating an address via the second line as a source address; When transmitting data from the second server to the device itself,
Route determining means for determining a route for connecting the second server to the own device via the internet network and the second line by the address through the second line set by the address designating means; A communication control device comprising: a data transmission unit that performs data transmission from the second server to the device itself through a route that passes through the second line determined by the route determination unit. 2. A telephone line for performing communication at a first communication speed and a satellite line for performing communication at a second communication speed higher than the first communication speed are accommodated, and the telephone line and the satellite line are connected. In a communication control device for accommodating and transmitting / receiving data to / from a second server connected to an internet network having a first server, the second server via the first server using the telephone line from the own device. Address setting means for setting the address of the second server as a destination address when setting a call to the server, and for specifying an address via the satellite line as a source address, and data transmission from the second server to its own device. On the occasion,
A route determining means for determining a route for connecting the second server to the own device via the internet network and the satellite line by the address via the satellite line set by the address designating means, and the route determining means. A communication control device comprising: a data transmission unit that performs data transmission from the second server to the device itself through the determined route via the satellite line. 3. A telephone line for performing communication at a first communication speed and a satellite line for performing communication at a second communication speed higher than the first communication speed are accommodated, and the telephone line and the satellite line are connected. In a communication control device for accommodating and transmitting / receiving data to / from a second server connected to an internet network having a first server, the second server via the first server using the telephone line from the own device. When setting the call to the server, the address of the second server is set as the destination address, and the address specifying means for specifying its own address or another address via the satellite line as the source address, and the second server itself. When transmitting data to
A route determining means for determining a route for connecting the second server to the own device via the internet network and the satellite line by the address via the satellite line set by the address designating means, and the route determining means. A communication control device comprising: a data transmission unit that performs data transmission from the second server to the device itself through the determined route via the satellite line. 4. A communication control device accommodating a first line for performing communication at a first communication speed and a second line for performing communication at a second communication speed higher than the first communication speed, Addressing means for designating a first address indicating a destination address and a second address indicating an own address using the second line in a calling procedure for the destination using the first line, And forming a first path through the first line by the first address designated by the address designating means for performing upstream communication with the destination, and by the second address. A communication control device, characterized in that a second path is formed through the second line to perform downlink communication from the partner. 5. A communication control device accommodating a telephone line for performing communication at a first communication speed and a satellite line for performing communication at a second communication speed higher than the first communication speed, wherein the telephone line is Addressing means for designating a first address indicating the address of the destination and a second address indicating the own address using the satellite line in the calling procedure for the destination used, A first route through the telephone line is formed by the first address specified by the above to perform upstream communication with the other party, and a second route through the satellite line is formed by the second address. A communication control device, which is formed to perform downlink communication from the other party. 6. The communication control according to claim 1, wherein the designation of the first address and the second address is designated by calling by a communication protocol of a transport layer of the Internet network. apparatus. 7. A client that accommodates a telephone line that performs communication at a first communication speed and a satellite line that performs communication at a second communication speed that is faster than the first communication speed, the telephone line and the satellite. In a communication system comprising an internet network accommodating a line and having a first server, and a second server connected to the internet network, the first server is provided from the client using the telephone line. Address setting means for setting the address of the second server as a destination address and setting an address via the satellite line as a source address when setting a call to the second server via the second server. When transmitting data to the client, the data is sent via the satellite line set by the addressing means. A route determining means for determining a route for connecting the second server to the client via the Internet network and the satellite line by an address, and a route through the satellite line determined by the route determining means. And a data transmission unit for transmitting data from the server to the client. 8. A client that accommodates a first line that performs communication at a first communication speed and a second line that performs communication at a second communication speed that is faster than the first communication speed, and In a communication system including a network that accommodates one line and the second line and that has a first server, and a second server connected to the network, the first line from the client Using the first
Address setting means for setting the address of the second server as the destination address and setting the address of the second line as the source address when setting the call to the second server via the server. At the time of data transmission from the second server to the client, the second server is connected to the client via the network and the second line by the address via the second line set by the address designating means. Route determining means for determining a route to be performed, and data transmitting means for performing data transmission from the second server to the client by the route via the second line determined by the route determining means. A communication system characterized by. 9. A client that accommodates a first line that performs communication at a first communication speed and a second line that performs communication at a second communication speed that is faster than the first communication speed; A communication control method for performing communication with a server connected to an Internet network, which accommodates one line and the second line, comprising: connecting the client to the Internet network via the first line. And a second step of designating from the client to the Internet network a first address indicating the address of the server and a second address indicating the address of the client using the second line. , Connecting the client to the server via the Internet network using the first address,
Forming a first upstream communication path via the second line and forming a second downstream communication path via the second line using the second address; and the first step. The fourth step of transmitting a data transfer request from the client to the server via the communication path of No. 4, and the data read from the server in response to the data transfer request via the second communication path. A fifth step of transmitting, and a communication control method comprising: 10. A client accommodating a telephone line for performing communication at a first communication speed, a satellite line for performing communication at a communication speed faster than the first communication speed, a telephone line and the satellite line. A communication control method for communicating with a server connected to an Internet network, comprising: a first step of connecting the client to the Internet network via the telephone line; A second step of designating a first address indicating the address of the server and a second address indicating the address of the client using the satellite line; and using the first address to direct the client to the Internet network. And connecting to the server via the telephone line to form an upstream first communication path via the telephone line. To
A third step of forming a second downlink communication path via the satellite line using the second address, and a data transfer request from the client to the server via the first communication path. A communication control comprising: a fourth step of transmitting, and a fifth step of transmitting the data read from the server in response to the data transfer request, via the second communication path. Method. 11. A client accommodating a telephone line for performing communication at a first communication speed, a satellite line for performing communication at a communication speed faster than the first communication speed, a telephone line and the satellite line. A communication control method for communicating with a server connected to an Internet network, comprising: a first step of connecting the client to the Internet network via the telephone line; A second step of designating a first address indicating the address of the server and a second address designating its own or another address via the satellite line, and using the first address to direct the client to the Internet. When connecting to the server via a network and forming an upstream first communication path via the telephone line, To
A third step of forming a second downlink communication path via the satellite line using the second address, and a data transfer request from the client to the server via the first communication path. A communication control comprising: a fourth step of transmitting, and a fifth step of transmitting the data read from the server in response to the data transfer request, via the second communication path. Method. 12. The communication control according to claim 9, wherein the designation of the first address and the second address is designated by calling by a communication protocol of a transport layer of the Internet network. Method. 13. A client accommodating a first line for performing communication at a first communication speed and a second line for performing communication at a second communication speed higher than the first communication speed, and the client. In a communication control method for communicating with a server connected to a network accommodating a first line and the second line, a first step of connecting the client to the network via the first line A second step of designating from the client to the network a first address indicating the address of the server and a second address indicating the address of the client using the second line; When the client is connected to the server via the network using the address of 1 to form an upstream first communication path via the first line, Together, the third step of forming a second downlink communication path via the second line using the second address, and from the client to the server via the first communication path. A fourth step of transmitting a data transfer request, and a fifth step of transmitting the data read from the server in response to the data transfer request via the second communication path. Communication control method. 14. A client that accommodates a telephone line that performs communication at a first communication speed and a satellite line that performs communication at a second communication speed that is faster than the first communication speed, the telephone line and the satellite. A communication control method for performing communication with a server connected to a network accommodating a line, comprising: a first step of connecting the client to the network via the telephone line; A second step of designating a first address indicating the address of the server and a second address indicating the address of the client using the satellite line; and using the first address to direct the client to the network. Via the telephone line to form an upstream first communication path, and A third step of forming a second downlink communication path via the satellite line using the address 2 and a data transfer request from the client to the server via the first communication path. A communication control method comprising: a fourth step; and a fifth step of transmitting the data read from the server in response to the data transfer request, via the second communication path.