JP3183380B2 - Communication control device, communication control method, and communication system using the communication control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication control apparatus, a communication control method, and a communication system using the communication control apparatus, in which a client or the like communicates with a server or the like using 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 one call.

[0002]

2. Description of the Related Art In recent years, the use of the Internet has dramatically increased. In particular, WWW servers (Hypertext
Is an information providing server that uses
To access information that may be
With the development of mosaic and other software on the client side, the spread of database access services in the form of clients and servers has been remarkable.

[0003] In the database access service in the form of client and server, the transfer data amount of the upstream communication from the client to the server is small, while the transfer data amount of the downstream communication from the server to the client is small. There is an imbalance in the amount of communication, which is extremely large, which is not preferable from the viewpoint of effective use of the line.

[0004] This tendency will be further promoted if the transfer of image and audio data increases with the use of multimedia in the transfer data.

[0005]

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

Therefore, in order to make effective use of the line, it is considered that the upstream and downstream lines are separated from each other.
At present, in one call with call setup, that is, the data transmission / reception format is not a broadcast format, but an ACK for one call.
There is no method for easily performing path control of uplink and downlink as separate lines in a communication format in which communication is performed by confirming with (acknowledgement) and NACK (negative acknowledgement).

That is, the client's subscriber line has the same line for the upstream and downstream, and there is no conventional method for simply controlling the upstream and downstream of the client's subscriber line as separate lines. However, the problem of unbalance cannot be solved, which is not preferable from the viewpoint of effective use of the line.

Accordingly, the present invention enables the uplink and downlink of communication data to be route-controlled as separate lines with a simple configuration, thereby eliminating the problem of imbalance in the traffic volume of uplink and downlink data. An object of the present invention is to provide a communication control device, a communication control method, and a communication system using the communication control device, which can effectively utilize the communication control device.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a first line for communicating at a first communication speed and a second line for communicating at a second communication speed higher than the first communication speed. A communication which accommodates a second line for communication and accommodates the first line and the second line, and transmits and receives data to and from a second server connected to an Internet network having a first server. In the control device, the second device via the first server from the own device using the first line
Address setting means for setting the address of the second server as a destination address when setting a call to the server and specifying an address via the second line as a source address; A route for determining a route for connecting the second server to its own device via the Internet network and the second line based on the address via the second line set by the address designating means at the time of data transmission. comprising a determining unit, and a data transmission means for transmitting data to the own equipment from the second server by the route through the determined said second line by said routing means, said address
Address specified by the address specifying means
During the call setup and communication between the server and the second server.
It is not changed .

Further, the present invention accommodates a telephone line for communicating at a first communication speed and a satellite line for communicating at a second communication speed higher than the first communication speed. In a communication control device that accommodates the satellite line and transmits and receives data to and from a second server connected to an Internet network having a first server, the communication control device transmits the data from its own device via the first server using the telephone line. Address setting means for setting the address of the second server as a destination address when setting up a call to the second server and specifying an address via the satellite line as a source address; At the time of data transmission to the second server, the address is set via the satellite line set by the address designating means. Internet, data transmission and routing means for determining a path connected to the own device via the satellite line, the path through the satellite link as determined by the routing means from said second server to the own device anda data transmission means for performing, the address
The address specified by the address specifying means is
Changes during call setup and communication with the second server
It is characterized by not being changed .

[0011]

Further, the present invention provides a first line for performing communication at a first communication speed, and a second line for communicating at a first communication speed higher than the first communication speed.
A communication control apparatus accommodating a second line that communicates at a communication speed of: a first address indicating a destination address in a calling procedure for the destination using the first line; Addressing means for designating a second address indicating its own address by using the first address specified by the first address specified by the address designating means. To perform uplink communication with the other party,
The address to form a second path through said second channel to communicate downlink from the other party, the above add
The address specified by the address specifying means is
It is characterized in that it is not changed in the course of downlink route formation and communication .

Further, the present invention provides a communication control apparatus for accommodating a telephone line for communicating at a first communication speed and a satellite line for communicating 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 in a calling procedure for the other party using the telephone line and a second address indicating the own address using the satellite line; The first address specified by the address specifying means forms a first route via the telephone line to perform upstream communication with the other party, and the second address specifies a first route via the satellite line via the satellite line. forming a second path to communicate downlink from said destination, said addressing means
The address specified by the above is the upstream and downstream route type
A communication control device which is not changed during the course of communication and communication .

Further, the present invention provides a client for accommodating a telephone line for communicating at a first communication speed, a satellite line for communicating at a second communication speed higher than the first communication speed, and And a second server connected to the Internet network, the Internet network having a first server that accommodates the communication line and the satellite line. Address setting means for setting the address of the second server as a destination address when setting up a call to the second server via the first server, and specifying the address via the satellite line as a source address; When data is transmitted from the server to the client, the address set by the address designating means Path through the Internet network to the second server by the address via the satellite link, a route determining means for determining a path connected to the client via the satellite line, the satellite connection, which is determined by the routing means Data transmission means for performing data transmission from the second server to the client by
Comprising a, designated by the addressing means address
Less between the client and the second server
Is not changed during the call setting and communication .

Further, the present invention provides a first line for communicating at a first communication speed, and a second line for communicating at a first communication speed higher than the first communication speed.
A network accommodating a second line that communicates at a communication speed of 1, a network accommodating the first line and the second line and having a first server, and a second network connected to the network. And a server, wherein the address of the second server is set as a destination address when a call is set from the client to the second server via the first server using the first line. Address specifying means for specifying an address via the second line as a source address, and the second line set by the address specifying means when data is transmitted from the second server to the client. Via the network, the second server via the second line And routing means for determining a path connected to clients, and a data transmission means for transmitting data to the client from the second server by the route through the determined second line by said routing means Provided and specified by the addressing means described above.
Address of the client and the second server
It is characterized in that it is not changed in the middle of the call setting and communication between the two.

Further, the present invention provides a first line for communicating at a first communication speed and a second line for communicating at a first communication speed higher than the first communication speed.
A communication control method for performing communication between a client accommodating a second line that communicates at a communication speed and a server connected to the Internet network accommodating the first line and the second line. A first step of connecting the client to the Internet network via the first line, and a first address indicating the address of the server and the second line from the client to the Internet network. A second step of designating a second address indicating the address of the client used, and connecting the client to the server via the Internet using the first address to connect the first line. Forming a first communication path through the second line and using the second address to form a second communication path through 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 transmitting data read from the server in response to the data transfer request to the second communication path 5th to send via
Of the step, it comprises a, specified in the second step
Address between the client and the server
It is not changed in the course of communication path formation and communication .

Further, the present invention provides a client accommodating a telephone line for communicating at a first communication speed and a satellite line for communicating at a communication speed higher than the first communication speed.
A communication control method for performing communication between a server connected to an Internet network accommodating the telephone line and the satellite line, wherein 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 indicating the address of the client using the satellite line; and the first address To connect the client to the server via the Internet network to form an upstream first communication path via the telephone line, and to use the second address to connect to the downstream via the satellite line. A third step of forming a second communication path; a fourth step of transmitting a data transfer request from the client to the server via the first communication path; And transmitting the data read from the server via the second communication path .
The address specified in the second step is
Communication path between the client and the server
It is characterized in that it is not changed on the way .

[0018]

Further, the present invention provides a first line for communicating at a first communication speed, and a second line for communicating at a first communication speed higher than the first communication speed.
A communication control method for performing communication between a client accommodating a second line that communicates at a communication speed and a server connected to a network accommodating the first line and the second line. The client to the first
A first step of connecting to the network via the line, a first address indicating the address of the server from the client to the network, and a first address indicating the address of the client using the second line. A second step of designating an address 2 and connecting the client to the server via the network using the first address to form an upstream first communication path via the first line. And a third step of using the second address to form a second downstream communication path via the second line, and from the client to the server via the first communication path. Transmitting a data transfer request through the second communication path, and transmitting data read from the server in response to the data transfer request through the second communication path. A fifth step of transmitting Te, the ingredients
And the address specified in the second step is
Formation of a communication path between the client and the server;
It is characterized in that it is not changed during communication .

Further, the present invention provides a client for accommodating a telephone line for communicating at a first communication speed, a satellite line for communicating at a second communication speed higher than the first communication speed, In a communication control method for performing communication between a line and a server connected to a network accommodating the satellite line, 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 to the network; 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. A third step of forming a second downstream communication path via the satellite line using the second address; and transmitting data from the client to the server via the first communication path. a fourth step of transmitting a transfer request, comprising a fifth step of transmitting the data read from said server in response to the data transfer request via the second communication path, and the second of
The address specified in the step is
Change in the middle of communication path formation and communication with the above server
It is characterized by not being performed .

In the communication control apparatus according to the present invention, the first address indicating the address of the other party in the calling procedure for the other party using the first line and the own address using the second line are provided by the address designating means. And a second address is designated, and the first address designated by the address designation means forms a first route through the first line to perform uplink communication with the other party, and the second address A second path is formed via the second line by the address to perform downstream communication from the other party.

Here, the first line can be constituted by a wired telephone line, and the second line can be constituted by a wireless satellite line.

Further, the address specifying means can be configured to specify the second address in a calling procedure for a destination using a communication protocol of a transport layer of the Internet network.

Further, in the communication control apparatus according to the present invention, the address specifying means uses the address of the second server as a destination address when setting a call 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 specified as a source address, and when 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 specifying means. A route for connecting the second server to the client via the Internet network and the second line is determined by the address, and the second route determined by the route determining unit is determined by the data transmission unit.
The data transmission from the second server to the client is performed through the route via the line.

In the communication control method according to the present invention, the client is connected to the Internet via the first line, and the first address indicating the server address and the second address indicating the address of the server from the client to the Internet are provided. A second address indicating the address of the client using the line is designated, and the client is connected to the server via the Internet using the first address, and the first communication is performed via the first line. To form a road,
And forming a second downstream communication path via the second line by using the address of the client, and then transmitting a data transfer request from the client to the server via the first communication path,
The data read from the server in response to the data transfer request is transmitted via the second communication path.

Here, the first line can be constituted by a wired telephone line, and the second line can be constituted by a wireless satellite line.

Further, the first address and the second address can be specified by a call procedure using a communication protocol of a transport layer of the Internet network.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a communication control device, a communication control method, and a communication system according to the present invention will be described 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, a WWW server is provided on the receiving side.
Mosai as a software for accessing and viewing information
A client with a network
Network 21 with a dial-up IP connection function using a telephone network.
And a WWW (World Wide Web) server 20 connected to the Internet network 21 on the transmitting side.
The client 10 receives a data transfer service from the WWW server 20 in response to a data transfer request from the client 10, that is, a so-called client-server type database access service.

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

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

Before explaining 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 a client / server format,
In general, the amount of transfer data for uplink communication from the client to the server is small, but the amount of transfer data for downlink 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,
Assign a low-speed subscriber line for upstream communication from a client with a small amount of transferred data to a server in one call, and allocate a high-speed subscriber line for downstream communication from a server with a large amount of transferred data to a client. 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 a 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 as low as, for example, 28.8 kbps, but the data transmission speed of the satellite line is as high as, for example, 150 kbps. Thus, it is possible to solve the problem that it is impossible to effectively use the line due to the imbalance between the uplink and downlink traffic.

Here, the satellite line is a wireless line (ie,
Since it is a broadcast format that anyone can receive one outgoing radio wave)
Can be shared with other clients, and the overall cost of the system's subscriber line is not very high.

FIG. 2 shows a schematic structure of the present invention constructed based on the above-mentioned idea in principle corresponding to FIG.

The configuration shown in FIG. 2 is such that a client 10 of a dial-up IP connection using a telephone network makes a data transfer request to a WWW server 20 connected via an Internet network 21 to access a database in a client / server format. You will receive services.

Here, a data transfer request from the client 10 to the WWW server 20 is made through the telephone network 30a using the telephone network and the Internet network 21. Then, the client 10 from the WWW server 20
Is transmitted via the Internet 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 a 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 related to Ethernet, leased line, public line, etc.
AC (Media Access Control) layer, PPP (Point
to Point Protocol), SLIP (Serial Line Interface)
ace Protocol), and IP (Inte
rnet Protocol) and the transport layer is TCP
(Transmission Control Protocol), and various applications are provided on the transport layer via “socket”.

Here, the MAC layer has a function of controlling the transmission right so that frames sent from various nodes do not collide with each other. PPP uses an IP function on a dedicated line to identify an upper layer protocol. SLIP is a protocol for using IP over an asynchronous line, and "socket" is an AIP (Applicatio) for providing a transport layer function to an application program.
n Program Interface).

In the communication control apparatus and method according to the present invention, the control of the upstream and downstream communication paths is controlled by the TC
This is realized by adding a function to an application program using 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 generates a socket (step 101), and then calls "connect" to set up a connection (step 103). As a result, a call connection is established between the client 10 and the server 20.

Here, the execution of a connection requires a destination (destination) address and a source (source) address. The destination address is specified by an argument of “connect” by an application program, and the source address is TCP. In the / IP protocol program, the address of the subscriber line to be actually used in the uplink 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 at the time of 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 sends a data transfer request by calling "write" (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 the database access service processing. I do.

As described above, in the conventional procedure, the downstream communication from the server 20 uses the same subscriber line as the upstream 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.
01 is generated after the process of generating the socket No. 01, and the satellite line 40 used in the downlink communication as the address of the client 10 for the socket by calling “bind”
A process 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 call socket
Then, the address of the subscriber line using the satellite line 40a used for the downlink communication is designated as the address of the client 10 (step 202).

Thereafter, "connect" is called to set a connection (step 203). In this case, the destination address is set in the same manner as in the conventional procedure, but the source address is set to “bind” in step 202 described above.
Follow the specification in. That is, the source address in this case is not the address corresponding to the subscriber line actually used in the upcoming communication as in the conventional procedure shown in FIG. 4, but the subscriber using the satellite line 40a used in the downcoming communication. The address of the line is specified. For this reason, the downstream communication from the server 20 uses a different subscriber line from the upstream communication to the server 20.

Next, the client 10 sends a data transfer request by calling "write" (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 the database access service processing. I do.

As described above, in the communication control device and method of the present invention, the addition of "bind"
When data is sent from the server to the server 20, the address of another subscriber line for downstream communication is set as the source address instead of the address of the subscriber line for upstream communication. Can be routed as a separate line on the upstream and downstream.

In the above description, the control of the upstream and downstream communication paths is realized by adding a function to an application program using the TCP communication protocol. A process of setting an address of another subscriber line for downlink communication as a source address instead of an address of a subscriber line for uplink communication can be realized by adding a function of a TCP / IP protocol program.

Returning to FIG. 1, in the communication system of the embodiment constructed using the communication control device 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. .

That is, the TCP /
The header of the IP communication protocol has an IP header section and a TCP header section, and the IP header section contains 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, that is, the address of the subscriber line using the communication satellite 40 shown in FIG.

Here, the IP address of the WWW server 20 is the network address “A” and the host address “m”.
, And the IP address of the upstream subscriber line of the client 10 is the network address “B”.
And "B + n" consisting of a host address "n" and
The IP address of the downlink subscriber line of the client 10 is composed of “C + 1” including a network address “C” and a host address “l”.

By the way, in FIG.
0 is a computer, for example, a workstation or a personal computer.
The dial-up IP connection 1 is made 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 of the client 10 from the communication satellite 40 is performed by the antenna tuner 15, descrambler 14, satellite adapter (R) 13, Ethernet 1
2 is performed.

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

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

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. Satellite adapter (S) 22 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, an IP router function of transmitting the IP datagram to the satellite broadcast transmitting station 23 and the IP datagram
It has a protocol conversion function to put it on a satellite line using.

The satellite broadcast transmitting station 23 transmits the data from the satellite adapter (S) 22 to a part of the broadcast wave to the antenna tuners 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, from among radio waves received via the antenna tuner 15 and the descrambler 14. A function of extracting an IP address having an IP address destined for a host under its affiliation, for example, the client 10 in the case of FIG.
It has a protocol conversion function of converting an IP datagram from a satellite line using the communication satellite 40 so as to be compatible with the Ethernet 12.

FIG. 7 shows that the client 10 shown in FIG.
It shows a signal and a data sequence between the client 10 and the WWW server 20 when accessing the WWW server 20 and receiving data transfer such as a homepage after connecting to the PP server 21a.

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 communicates with the PPP server 21 of the Internet network 21.
A call (connection) setting is made to the WWW server 20 connected to the Internet 21 via a (step 30).
2, 303).

At this time, (1) the destination IP address is “A + m”, and (2) the source IP address uses the subscribed telephone network 30, but the communication satellite 40 is used as the source IP address by the above “bind” processing. "C +" via satellite line using
1 "is set.

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 network 21 via the telephone line (steps 304 and 305).

When WWW server 20 receives this data transfer request, it responds to this request by sending IP address "C + 1"
Is sent to the destination (step 30).
6).

Here, in the Internet network 21, route routing is performed 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, it sends an ACK to the PP of the Internet network 21 via the telephone line using the subscriber telephone network 30.
The data is returned to the WWW server 20 via the P server 21a (steps 308 and 309).

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

In this case as well, the Internet network 21
Since the routing of the route is performed based on the P address “C + 1”, this data 2 is transmitted to the satellite broadcast transmitting station 23 and the communication satellite 40.
Is sent to the client 10 via the satellite line using the command (step 311).

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

The above operation is repeated until the transfer of data from the WWW server 20 to the client 10 is completed. When the transfer of data from the WWW server 20 to the client 10 is completed, the client 10 is connected to the Internet via a telephone line. A "call (connection) release" is sent to the WWW server 20 via the PPP server 21a of step 21 (steps 314, 315). This allows W
The connection with the WW server 20 is released.

Thereafter, the client 10 sends “P” to the PPP server of the Internet network 21 via the subscriber telephone network 30.
"PP server release" (step 316), ending this signal and data sequence.

[0082]

As explained above, according to the present invention,
In a calling procedure for a destination using the first line, a first address indicating the address of the destination and a second address indicating the own address using the second line are designated, and the designated second address is designated. 1 through the first line with the address 1
Is formed so as to perform upstream communication with the other party and to form a second path via the second line with the second address to perform downstream communication from the other party. It is possible to route control the uplink and downlink of communication data as separate lines with a simple configuration, thereby eliminating the problem of imbalance in the traffic volume of uplink and downlink data and achieving effective use of the line. It works.

[Brief description of the drawings]

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

FIG. 2 is a block diagram conceptually showing the communication system shown in FIG. 1;

[Fig. 3] TCP / IP (Transmission Control Protocol)
1 is a diagram showing a protocol stack of communication using l / Internet Protocol).

4 is a flowchart showing a conventional calling procedure when using a TCP communication protocol in an application program on the client side shown in FIG. 2;

FIG. 5 is a flowchart showing a calling procedure employed in the present invention when using the TCP communication protocol in the application program on the client side shown in FIG. 2;

FIG. 6 is a view showing an example of a header of a TCP / IP communication protocol used in the embodiment shown in FIG. 1;

FIG. 7 shows a case where the client shown in FIG.
After making a P connection and connecting to a PPP server on the Internet network,
5 is a sequence chart showing signals and data between the client and the WWW server when accessing the 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 Subscriber Telephone Network 40 Communication Satellite

Continuation of front page (56) References Table 9-510596 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04L 29/08 H04B 7/15

Claims (12)

(57) [Claims] 1. A first line for communicating at a first communication speed
And communicate at a second communication speed higher than the first communication speed.
And the first line and the second line.
A second line is accommodated and a first server is provided.
Internet networkConnectionData of the second server
In the communication control device for transmitting and receiving, the first server is transmitted from the own device using the first line.
When setting up a call to the second server via
If you set the address of the second server as the dress
Both are sent through the second line as the source address.
Address designation means for designating an address; when data is transmitted from the second server to the own device,
The second line set by the address designating means
The second server by the address via the
-Network network, via the second line to the own deviceConnectionDo
Via a route determining means for determining a route, and via the second line determined by the route determining means
Data from the second server to the own device according to the route
Data transmission means for transmission;Have, The address specified by the address specifying means is
Call setup and communication between the device and the second server
Not be changed during A communication control device characterized by the above-mentioned. 2. A telephone line for communicating at a first communication speed.
And communicate at a second communication speed higher than the first communication speed.
And a telephone line and the satellite
An interface housing a star line and having a first server.
-On the netConnectionSending and receiving data to and from the second server
A communication control device that performs the communication through the first server from the own device using the telephone line.
Destination address when setting up a call to the second server
To set the address of the second server as
Also, the address via the satellite line is used as the source address.
Address specifying means for specifying the address; and
The satellite line set by the addressing means is
The second server by the intervening address.
To the own device via the network and the above satellite lineConnectionRoute
Via the satellite line determined by the route determining means.
Data transmission from the second server to its own device
Data transmission means for transmittingHave, The address specified by the address specifying means is
Call setup and communication between the device and the second server
Not be changed during A communication control device characterized by the above-mentioned. 3. A first line communicating at a first communication speed.
And communicate at a second communication speed higher than the first communication speed.
A communication control apparatus accommodating a second line for performing a call in a calling procedure for a destination using the first line.
The first address indicating the destination address and the second line
And a second address indicating the address of the self used.
That addressing means, comprising a said first address specified by the addressing means
To form a first path through the first line.
To perform upstream communication with the other party
The second address via the second line by the second address
A path is formed to perform downstream communication from the other party, and the address specified by the address specifying means is
It is not changed during the formation of the upstream and downstream routes and communication
A communication control device, characterized in that. 4. A telephone line for communicating at a first communication speed.
And communicate at a second communication speed higher than the first communication speed.
In a communication control apparatus accommodating a satellite line for performing a call,
Using a first address indicating the address of the satellite and the satellite line
Address that specifies the second address indicating the own address
Addressing means, and the first address specified by the addressing means.
Form a first path through the telephone line
Performs upstream communication to the other party and
The second route via the satellite line by the address 2
And performs downstream communication from the other party, and the address specified by the address specifying means is
It is not changed during the formation of the upstream and downstream routes and communication
A communication control device characterized by the above-mentioned. 5. The first address and the second address.
Is specified in the communication protocol of the transport layer of the Internet network.
It is specified by calling with a col
The communication control device according to claim 1. 6. A telephone line for communicating at a first communication speed.
And communicate at a second communication speed higher than the first communication speed.
A client accommodating a satellite line for performing the
In a communication system including an Internet network having one server and a second server connected to the Internet network, the client uses the telephone line to connect to the first network .
When setting up a call to the second server via the server,
To set the address of the second server as the destination address.
And set the above satellite line as the source address.
Addressing means for designating an address to be transmitted, and data transmission from the second server to the client
At the time, the above-mentioned
Up the second server by the address via the satellite line
The client via the Internet network and the satellite line
A route determining means for determining a route to be connected to the ant, and via the satellite line determined by the route determining means.
Route from the second server to the client
Data transmission means for performing data transmission of the above, wherein the address specified by the address specification means is
Call setup and communication between the client and the second server
Communication system that is not changed during communication
Tem. 7. A first line performing communication at a first communication speed.
And communicate at a second communication speed higher than the first communication speed.
And a client accommodating a second line for performing the above-mentioned operations and a client accommodating the first line and the second line.
In a communication system including a network having a first server and a second server connected to the network, the client uses the first line to connect to the first server .
When setting up a call to the second server via the server
And the address of the second server as the destination address
And the second address as the source address.
Address specifying means for specifying an address via a line, and data transmission from the second server to the client
At the time, the above-mentioned
The second server is designated by the address via the second line.
The client via the network and the second line.
And routing means for determining a path connected to Ant, through the second line determined by the routing means
From the second server to the client
Data transmission means for performing data transmission to the above, wherein the address specified by the address specification means is
Call setup and communication between the client and the second server
Communication system that is not changed during communication
Tem. 8. A first line communicating at a first communication speed.
And communicate at a second communication speed higher than the first communication speed.
A client accommodating a second line for performing
Internet accommodating the first line and the second line
Communication control method for communication with servers connected to the network
In the method, the client is connected to the client via the first line.
A first step of connecting to the Internet network;
A first address indicating the address of the server and the second address
A second indicating the address of the client using the line
A second step of specifying an address; and using the first address to connect the client to the client.
Connects to the server via the Internet and
To form an upstream first communication path via
Via the second line using the second address.
A third step of forming a second downstream communication path, and the client from the client via the first communication path.
Fourth step of sending a data transfer request to the server
When read from the server in response to the data transfer request
A fifth switch for transmitting the received data via the second communication path.
Comprising the step, and the address specified in the second step, the class
Communication path between the client and the server
A communication control method, wherein the communication control method is not changed on the way. 9. A telephone line for communicating at a first communication speed.
And communicate at a communication speed higher than the first communication speed.
A client accommodating a satellite line and the telephone line
Connected to the Internet network accommodating the above satellite lines.
In the communication control method for performing communication with a server to be controlled, the client is connected to the server via the telephone line.
A first step of connecting to a network, and
A first address indicating the address of the server and the satellite number
A second address indicating the client's address using a line.
A second step of specifying the address, the y the client using the first address
Connect to the server via the Internet
Forming an upstream first communication path via a line,
Downlink via the satellite line using the second address
A third step of forming a second communication path of the client; and a step of forming the second communication path from the client through the first communication path.
A fourth step of transmitting the data transfer request to the over server
When read from the server in response to the data transfer request
A fifth switch for transmitting the received data via the second communication path.
Comprising the step, and the address specified in the second step, the class
Communication path between the client and the server
A communication control method, wherein the communication control method is not changed on the way. 10. The first address and the second address.
The designation of the less Communication protocol of the transport layer of the Internet network
Characterized by calling with a col
The communication control method according to claim 8. 11. A first communication which performs communication at a first communication speed.
Line and a second communication speed higher than the first communication speed.
A client accommodating a second line for communication,
A network accommodating the first line and the second line
Communication control method for communicating with a server connected to a network
Wherein the client is connected to the network via the first line.
A first step of connecting to the network;
Address indicating the address of the server and the second line
A second address indicating the address of the client using
A second step of designating the client and the client using the first address.
Connected to the server via a network
Forming an upstream first communication path via a line,
The downlink via the second line using the second address
A third step of forming a second communication path of the client; and a step of forming the second communication path from the client through the first communication path.
Fourth step of sending a data transfer request to the server
When read from the server in response to the data transfer request
A fifth switch for transmitting the received data via the second communication path.
Comprising the step, and the address specified in the second step, the class
Communication path between the client and the server
A communication control method, wherein the communication control method is not changed on the way. 12. A telephone line for communicating at a first communication speed.
And communicate at a second communication speed higher than the first communication speed.
And a client accommodating a satellite line and the telephone
Connected to the network that houses the line and the above satellite line
Communication control method for communicating with the server
And connects the client to the network via the telephone line.
A first step of connecting to the network and the client from the client to the network.
The first address indicating the address of the
A second address indicating the address of the client used
A second step of designating the client and the client using the first address.
Connect to the server via the network and the telephone line
To form an upstream first communication path via
Using the second address, the downlink
A third step of forming a second communication path, and the service from the client via the first communication path.
Fourth step of sending a data transfer request to the server
When read from the server in response to the data transfer request
A fifth switch for transmitting the received data via the second communication path.
Comprising the step, and the address specified in the second step, the class
Communication path between the client and the server
A communication control method, wherein the communication control method is not changed on the way.