JP2000134262A - Internet connection method for terminal and system therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically IP-connect a reception side terminal which is a communicating opposite party to the Internet together with connection from a transmission side terminal to the Internet and to perform communication between both terminals at the time of access from the transmission side terminal to the reception side terminal. SOLUTION: After a user terminal 10 is dial-up-IP-connected to a commercial provider 13 by the connection request to the Internet 40 of a transmission side user terminal 10, an IP address lent from the commercial provider 13 to the user terminal 10 and Internet connection information are reported through the D channel of an ISDN 30 to a reception side user terminal 20. The reception side user terminal 20 is connected to the Internet by the commercial provider 23 based on the Internet connection information. The IP address lent from the commercial provider 23 is reported through the D channel of the ISDN 30 to the transmission side user terminal 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a system for connecting a terminal to the Internet, which is applied when communication is performed between a transmitting side terminal and a receiving side terminal such as a personal computer using the Internet. When the user terminals on the receiving side and the receiving side are dial-up connected to the Internet via a public line such as ISDN, their own IPs lent by an Internet service provider (hereinafter referred to as a commercial provider)
The present invention relates to a method and a system for connecting terminals to the Internet, which can mutually notify addresses.

[0002]

2. Description of the Related Art Dial-up IP connection is known as one of methods for connecting a user terminal such as a personal computer to the Internet using a telephone line or a public line such as ISDN. This dial-up IP
A connection is established between the user terminal and a host computer of a commercial provider housed in the Internet in response to a connection request from the user terminal to the Internet.
A connection is established by P (Point-to-Point Protocol), and after the connection is completed, a free IP address among the IP addresses secured by the host computer of the commercial provider is temporarily lent to the user terminal, and this IP address is provided. Based on this, communication with the communication partner terminal is enabled.

[0003]

In the above-described dial-up IP connection, the IP address given to the user terminal from the commercial provider changes each time the user terminal connects to the Internet. Unless the IP address of the communication partner is known, it is impossible to connect to the Internet due to the connection request of the communication partner. Therefore, when trying to communicate via the Internet between the sending and receiving user terminals,
It is necessary for the transmitting and receiving users themselves to notify each other of the IP addresses temporarily lent from the host computer of the commercial provider by using an existing telephone. However, such a method complicates the operation of connecting to the Internet and uses the existing telephone for notifying the rented IP address. Therefore, the line connection fee of the telephone is newly added in addition to the Internet connection fee. And call charges cannot be ignored.

Also, a monitoring terminal installed at a work site is operated by using a terminal installed at a remote place, or image information of the work site captured by a television camera of the monitoring terminal is taken in, and the like. When monitoring the situation, it is most desirable from the viewpoint of communication costs that the monitoring information and the operation information can be transmitted and received through an existing telephone line and the Internet. However, in the dial-up IP connection method, the IP address lent from the commercial provider changes every time the connection to the Internet is established.
Unless the given IP address is known, a remote terminal cannot access the monitoring terminal via the Internet. Therefore, in such a case, it is conceivable to connect the terminal at a remote place and the monitoring terminal by a dedicated line. However, the use of the dedicated line has a problem that the communication cost increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a connection destination from the transmitting terminal to the Internet and a communication destination when the transmitting terminal accesses the receiving terminal. An object of the present invention is to provide a method and system for connecting a receiving terminal to the Internet by automatically IP-connecting the receiving terminal to the Internet to enable communication between the terminals.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is configured so that two terminals having one terminal as a transmitting side and the other terminal as a receiving side can be connected and disconnected by an ISDN line. And a method for connecting each terminal to a commercial provider accommodated in the Internet by a dial-up IP connection, wherein the transmitting terminal is connected to the Internet by a request from the transmitting terminal to connect to the Internet. A first step of connecting to the commercial provider corresponding thereto and connecting the transmitting terminal to the receiving terminal via the ISDN line based on call setting information from the transmitting terminal; IP address lent by the commercial provider after connecting the transmitting terminal to the commercial provider in response to an Internet connection request A second step of obtaining a source terminal's own IP address as an own IP address, a third step of transmitting an Internet connection request of the transmitting terminal and its own IP address to the receiving terminal through a D channel of the ISDN line, After the receiving terminal has connected the receiving terminal to the corresponding commercial provider based on the Internet connection request of the transmitting terminal received by the receiving terminal, obtains an IP address lent from the commercial provider as its own IP address. The method includes a fourth step and a fifth step of transmitting the own IP address of the receiving terminal to the transmitting terminal through a D channel of the ISDN line. The present invention is also characterized in that after the fifth step is completed, the D channel of the ISDN line is released.

According to the present invention, two terminals having one terminal as a transmitting side and the other terminal as a receiving side can be connected and disconnected by an ISDN line, and the terminals are connected to the Internet. An Internet connection system of a terminal configured to be able to make an IP connection to a commercial provider, wherein the transmission-side terminal and the reception-side terminal correspond to each of the transmission-side terminal and the reception-side terminal according to a request for connection to the Internet. Communication control means for mutually notifying the own IP address lent from a commercial provider to be transmitted through the D channel of the ISDN line, and the communication control means responds to the transmission side terminal by an Internet connection request of the transmission side terminal. After connecting to a commercial provider, the IP address lent from the commercial provider is used as its own IP address. And the IP address acquisition means for acquiring,
A transmitting / receiving unit that transmits the own IP address and the Internet connection request obtained by the IP address obtaining unit to the receiving terminal through the D channel of the ISDN line, and receives the own IP address and the Internet connection request from the receiving terminal; Characterized by the following. The present invention is also characterized in that the call setting information from the transmitting terminal to the connection destination terminal is a telephone number or a subaddress.

In the method and system according to the present invention, after the transmission side terminal is dial-up IP-connected to the corresponding commercial provider in response to the connection request to the Internet, the commercial terminal lends to the transmission side terminal. The received IP address on the Internet and the Internet connection information are notified to the receiving terminal through the D channel of the ISDN line, and based on the Internet connection information, the receiving terminal is connected to the Internet by the commercial provider and leased from the commercial provider. The transmitted IP address on the Internet is notified to the transmitting terminal through the D channel of the ISDN line. Therefore, according to the present invention, when the transmitting terminal accesses the receiving terminal, the transmitting terminal is connected to the Internet and the receiving terminal, which is the communication partner, is automatically connected to the Internet by IP connection. Communication can be performed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing the overall configuration of a terminal Internet connection system according to an embodiment of the present invention, FIG. 2 is a functional block diagram of an IP address notification system according to an embodiment of the present invention, and FIG. 9 is a flowchart showing an operation procedure of connecting a terminal to the Internet and notifying an IP address in the embodiment.

In FIG. 1, a network using a terminal Internet connection system according to the present invention includes user terminals 10 and 20 for transmitting and receiving data such as control information and monitoring information to and from each other.
The phone number and subaddress of the connection destination terminal that is the communication partner,
And input units 101 and 201 such as a keyboard for setting own numbers and sub-addresses, and display units 102 and 202 for displaying set contents.

The serial port COM1 of the one user terminal 10 has a function of processing the layer 1 of the user / network interface.
, A terminal adapter 11 for converting a signal of the RS-232C standard or the like transmitted from the user terminal 10 into a signal of a format that can be handled by the ISDN,
It is connected to the ISDN 30 via the ISDN branch unit 15 and the digital line terminating device 12 having functions such as synchronization control, speed conversion, and overvoltage protection necessary for digital communication,
Further, the ISDN 30 is connected to the Internet 40 via the commercial provider 13 corresponding to the user terminal 10.
Is connected. Further, between the serial port COM2 of the user terminal 10 and the ISDN branching unit 15, the user's own IP address lent by the connection request to the Internet 40 between the user terminal 10 and the user terminal 20 is sent to the ISDN line. Communication control means 14 for mutually notifying through the D channel is connected.

Similarly, the serial port COM1 of the other user terminal 20 performs the function of the layer 1 of the user / network interface, that is, the user terminal 10 is connected to the ISDN (Integrated Services Digital Network) 3
0, more specifically, a terminal adapter 21 for converting a signal of the RS-232C standard or the like transmitted from the user terminal 20 into a signal of a format that can be handled by ISDN, an ISDN branch unit 25, and digital communication. It is connected to an ISDN 30 via a digital line terminator 22 having functions such as necessary synchronization control, speed conversion, and overvoltage protection. The ISDN 30 is connected to the Internet 40 via a commercial provider 23 corresponding to the user terminal 20. Is connected. Similarly, the serial port COM2 of the user terminal 20 and the IS
Communication between the user terminal 20 and the user terminal 10 for notifying the own IP address lent in connection with the connection request to the Internet 40 to the DN branching unit 25 through the D channel of the ISDN 30. Control means 24 is connected.

As shown in FIG. 2, the communication control means 14 and 24 are provided with one of the user terminals 10 and 20 as a transmitting side and the other as a receiving side, and a telephone number of a connection destination terminal from the transmitting side terminal. In the state where the transmitting terminal is connected to the receiving terminal via the ISDN line based on the call setting information corresponding to the sub-address or the sub-address, the transmitting terminal is connected to the commercial provider by the Internet connection request of the transmitting terminal, and then the commercial provider is connected. Address acquisition means 51 for acquiring the IP address lent from the company as its own IP address, and the IP address and Internet connection request acquired by the IP address acquisition means 51
A transmitting / receiving unit 52 that transmits to the receiving terminal through the D channel of N30 and receives its own IP address and Internet connection request from the receiving terminal, and a control unit 53 that controls and manages the IP address acquisition unit 51 and the transmitting / receiving unit 52. It is composed of

Next, the operation of the present embodiment configured as described above will be described with reference to FIG. In a case where the user terminal 10 is a receiving side and the user terminal 20 is a transmitting side, the user terminal 20 is connected to the Internet 40 by a request to connect the user terminal 20 to the terminal adapter 21 and the digital line terminal 2.
2 to the commercial provider 23 via the ISDN 30 and the user terminal 20 via the ISDN 30 to the receiving user terminal 10 based on the call setting information corresponding to the telephone number and subaddress of the connection destination terminal from the user terminal 20 (step). S1). Next, after connecting the user terminal 20 to the commercial provider 23 in response to the connection request of the transmitting user terminal 20 to the Internet 40, the IP address lent to the user terminal 20 from the commercial provider 23 The IP address of the communication control unit 24 is used as the IP address.
Acquired by the address acquiring means 51 (step S
2). Next, after the own IP address and the Internet connection request information acquired by the IP address acquisition means 51 are converted into packet data for D channel by the transmission / reception section 52 of the communication control means 24, the receiving user terminal is passed through the D channel of the ISDN 30 10 (step S3).

The IP transmitted from the transmitting / receiving section 52 of the communication control means 24 through the D channel of the ISDN 30
The address and the Internet connection request information are transmitted to the transmitting / receiving unit 52 of the communication control unit 14 in the receiving user terminal 10.
Is received by the control unit 53 of the communication control unit 14.
Is determined from the Internet connection request information of the sending user terminal 20 by the sending user terminal 20
Is determined (step S4), and based on the Internet request information, the receiving user terminal 1
The user terminal 10 issues a connection request to the Internet 40 to connect the user terminal 10 to the commercial provider 13 by the ISDN 30 through the terminal adapter 11 and the digital line terminating device 12. After connecting to the user terminal 1 from the commercial provider 13
0 is acquired by the IP address acquiring means 51 of the communication control means 14 as its own IP address on the Internet 40 (step S).
5). Then, the own IP address obtained by the transmitting user terminal 10 is converted into packet data for D channel by the transmitting / receiving unit 52 of the communication control unit 14,
Sender user terminal 2 through D channel of SDN 30
0 (step S6). After the processing in step S6 is completed, the D channel line of the ISDN 30 is released (step S7).

According to the above-described embodiment, after the user terminal is dial-up IP-connected to the corresponding commercial provider in response to the connection request of the transmitting user terminal to the Internet, the commercial terminal changes the user terminal. Notify the receiving user terminal of the IP address on the Internet and the Internet connection information lent to the receiving user terminal through the D channel of the ISDN line, and connect the receiving user terminal to the Internet by the commercial provider based on the Internet connection information. Since the IP address on the Internet lent by a commercial provider is notified to the transmitting user terminal through the D channel of the ISDN line, when the transmitting user terminal accesses the receiving user terminal, the transmitting user terminal accesses the receiving user terminal. Can be a receiving-side user terminal is a communication partner with the connection to the net to automatically IP connection to the Internet to communicate between the two user terminals. This allows the user to operate a monitoring terminal installed at the work site using a terminal installed at a remote location, or to capture the status of the work site by capturing image information of the work site captured by the TV camera of the monitoring terminal. In the case of monitoring, the monitoring information and the operation information can be transmitted and received via the Internet, and the communication cost can be reduced.

[0017]

As described above, according to the present invention, after the transmission side terminal is dial-up IP-connected to the corresponding commercial provider by the connection request to the Internet, the transmission side terminal transmits from the commercial provider to the transmitting side. The IP address on the Internet and the Internet connection information lent to the terminal are notified to the receiving terminal through the D channel of the ISDN line, and the receiving terminal is connected to the Internet by the commercial provider based on the Internet connection information. Since the IP address on the Internet lent by the provider is notified to the transmitting terminal through the D channel of the ISDN line, when the transmitting terminal accesses the receiving terminal, the transmitting terminal communicates with the connection to the Internet. Connect the receiving terminal that is the destination It can automatically be IP connection to communicate between the two terminals.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an overall configuration of an Internet connection system of a terminal according to an embodiment of the present invention.

FIG. 2 is a functional block diagram of the IP address notification system according to the embodiment of the present invention.

FIG. 3 is a flowchart showing an operation procedure of connecting a terminal to the Internet and notifying an IP address in the embodiment of the present invention.

[Explanation of symbols]

 10, 20 user terminal 11, 21 terminal adapter 12, 22 digital line terminator 13, 23 commercial provider 14, 15 communication control means 30 ISDN 40 Internet 51 IP address acquisition means 52 transmission / reception unit 53 control unit

Claims (4)

[Claims] 1. A commercial provider in which one terminal is a transmitting side and the other terminal is a receiving side so that both terminals can be connected and disconnected by an ISDN line, and the terminals are accommodated on the Internet. An Internet connection method for a terminal configured to be able to make a dial-up IP connection to said Internet terminal, wherein said transmission side terminal is connected to said commercial provider corresponding to said connection request by said transmission side terminal, and said transmission side terminal A first step of connecting the transmitting terminal to the receiving terminal via the ISDN line based on the call setting information from the server; and connecting the transmitting terminal to the commercial provider by an Internet connection request of the transmitting terminal. A second step of obtaining an IP address lent from the commercial provider later as its own IP address. And flop, Internet access request and own IP of the transmission side terminal
A third step of transmitting an address to the receiving terminal through the D channel of the ISDN line, and, based on the transmitting terminal's Internet connection request received by the receiving terminal, A fourth step of obtaining an IP address lent from the commercial provider as its own IP address after connecting to the commercial provider; and transmitting the own IP address of the receiving terminal to the transmitting terminal through the D channel of the ISDN line. A fifth step of transmitting; and a method for connecting the terminal to the Internet. 2. The method according to claim 1, wherein the D channel of the ISDN line is released after the fifth step is completed. 3. A commercial provider in which one terminal is configured as a transmitting side and the other terminal is configured as a receiving side so that both terminals can be connected and disconnected by an ISDN line, and the terminals are accommodated on the Internet. An Internet connection system of a terminal configured to be able to make an IP connection to the terminal, wherein the transmitting side and the receiving side terminal are connected to each other by a commercial corresponding to the Internet connection request between the transmitting side terminal and the receiving side terminal. Communication control means for mutually notifying the own IP address lent from the provider through the D channel of the ISDN line, wherein the communication control means sets the transmission side terminal to a corresponding commercial provider in response to an Internet connection request of the transmission side terminal. To get the IP address leased from the commercial provider as its own IP address An IP address acquisition means, self I acquired by the IP address acquiring means
A transmitting / receiving unit that transmits a P address and an Internet connection request to the receiving terminal through a D channel of an ISDN line, and receives an own IP address and an Internet connection request from the receiving terminal. Terminal Internet connection system. 4. The terminal Internet connection system according to claim 3, wherein the call setting information from the transmitting terminal to the connection destination terminal is a telephone number or a subaddress.