KR20070083109A - How to set up dial-up networking and its device - Google Patents

Abstract

A method for setting dial-up networking and an apparatus thereof are provided to obtain expandability and flexibility by composing a terminal as an entity in a network. A method for setting dial-up networking includes the steps of: receiving an authentication medium from a computer(402); receiving the authentication medium and determining whether the computer(402) is connected to a phone; transmitting a phone connection response message to the computer(402) if the computer is connected to the phone; setting a PPP(Point to Point Protocol) session with the computer(402); and setting a TCP/IP session with the computer(402).

Description

Method for setting Dial-up networking and Apparatus

1 is a diagram illustrating an RS-232 communication method between a computer and a mobile communication terminal according to the prior art.

2 is a diagram illustrating a configuration of a dial-up network layer formed by a general IS-707 standard.

3 is a flow chart illustrating a procedure for performing the dial-up network shown in FIG.

4 is a diagram illustrating a configuration of a dial-up network layer according to an embodiment of the present invention.

5 is a flowchart illustrating a procedure for performing the dial-up network shown in FIG.

6 is a computer and mobile communication terminal with a dial-up network according to a preferred embodiment of the present invention.

7 is a diagram illustrating a higher protocol set in a mobile communication terminal in which a dial-up network is formed according to a preferred embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

402: computer (TE2: Terminal Equipment2)

404: mobile communication terminal (MT2: Mobile Termination 2)

410, 430: relay layer of each device

415, 435: link layer of each device

420 and 440: network layer of each device

425, 445: upper protocol layer

The present invention relates to a data communication method, and more particularly, to a method and apparatus for setting up dial-up networking using a mobile communication terminal.

In general, a mobile communication terminal is configured to be used for data communication as well as voice communication by wirelessly combining with a mobile communication system such as a base station and an exchange. Such mobile communication terminals are not currently used as simple communication means, but have various functions such as schedule management, entertainment functions, banking, memory functions, and image processing functions through storage, processing, and management of data recorded by a user. These various functions have grown with the development of the electronics industry, which enables mobile communication terminals to store and process data. Therefore, a research on a communication scheme for transmitting data to or receiving data from a mobile communication terminal is currently in progress.

1 is a diagram illustrating an RS-232 communication method between a computer and a mobile communication terminal according to the prior art. 1, a computer 110 and a mobile communication terminal 120 are shown.

In general, the computer 110 and the mobile communication terminal 120 transmits and receives data by RS-232. RS-232 is a technology related to physical connections and protocols for relatively slow serial data communication between computers and related devices. The current version is C. RS-232C is an interface that computers use to exchange data with other serial devices such as modems. Data from the computer is usually sent from the DTE interface to an internal (or external) modem or other serial device by a UART chip on the motherboard. Because the data in the computer flows through parallel circuits, but serial devices can only process one bit at a time, the UART chip converts the parallel bits into a serial bit string. The PC's DTE agent, which communicates with a modem or other serial device based on the RS-232C standard, also has a complementary interface called the DCE interface.

The existing communication method simply uses an inefficient, inflexible simple request-response (REQUEST-ACK) method using a 1: 1 RS-232 method, and adopts a method with little scalability. There are also many problems in terms of security, speed, stability, scalability and flexibility.

The present invention provides a method and apparatus for setting up a dial-up networking that can basically solve security problems, speed problems, and stability problems in the conventional RS-232 communication.

In addition, the present invention provides a method and apparatus for setting up dial-up networking that can be scalable and flexible by configuring a terminal as an independent network entity on a network.

In addition, the present invention provides a method and apparatus for setting up a dial-up networking that can minimize the cost and time for application of the technology by utilizing the existing terminal technologies to the maximum.

In addition, the present invention provides a method and apparatus for setting up a dial-up networking that can have unlimited scalability and flexibility by allowing a network of a terminal when communicating with an external device by controlling and using a mobile communication terminal resource.

Technical problems other than the present invention will be easily understood through the following description.

According to an aspect of the present invention, a method for dial-up networking in a mobile communication terminal connected to a computer and connected to a mobile communication system, the method comprising: (a) receiving an authentication medium from the computer; (b) receiving the authentication medium to determine whether the computer can be dialed in; (c) transmitting a dial-up response message to the computer if the computer is accessible as a result of the determination; (d) establishing a PPP session with the computer; And (e) establishing a TCP / IP session with the computer.

Wherein step (d) comprises: (d-1) establishing a Link Control Protocol (LCP) that establishes and maintains a PPP session with the computer; And (d-2) setting an Internet Protocol Control Protocol (IPCP) for negotiating whether to assign an IP address with the computer.

Here, the authentication medium may include an ID and password for dial-up.

In addition, the method for setting up a dial-up networking of a mobile communication terminal according to the present invention comprises the steps of: (f) setting the mobile communication terminal to a host mode for transmitting the dial-up response message to the computer after authentication in system setting information; And (g) determining whether the system setting information is a host mode after receiving an authentication medium from the computer. If the system setting information is a host mode, step (b) may be performed.

Here, the step (f) may further include (h) setting at + crm of the configuration information of the mobile communication terminal to have any one value of 128 to 255.

In addition, the method for setting up a dial-up networking of a mobile communication terminal according to the present invention may further comprise (i) establishing a higher protocol with the computer after the TCP / IP session is established.

Here, the upper protocol may be HTTP or FTP.

According to another aspect of the present invention, a mobile communication terminal connected to a mobile communication system capable of mobile communication and connected to a computer and capable of dial-up networking, comprising: a receiving unit receiving an authentication medium from the computer; An authenticator configured to receive the authentication medium and determine whether the computer can be dialed up; A transmitter for transmitting a telephone connection response message to the computer when the authentication unit determines that the computer can be connected to the telephone; And a session establishment unit configured to establish a PPP session and a TCP / IP session with the computer.

Here, the authentication medium may include an ID and password for dial-up.

In addition, the mobile communication terminal capable of dial-up networking according to the present invention may further include a mode setting unit for setting to the host mode to transmit a dial-up response message to the computer when the transmission unit is able to access the computer. .

Here, the receiver and the transmitter may be wirelessly connected to the computer.

In addition, according to another aspect of the present invention, there is tangibly embodied a program of instructions that can be connected to a computer and connected to a mobile communication system to perform a method of dial-up networking in a mobile communication terminal. CLAIMS 1. A recording medium readable by means of: (a) receiving an authentication medium from the computer; (b) receiving the authentication medium to determine whether the computer can be dialed in; (c) transmitting a dial-up response message to the computer if the computer is accessible as a result of the determination; (d) establishing a PPP session with the computer; And (e) a recording medium storing a program for performing a step of establishing a TCP / IP session with the computer.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a method and apparatus for setting up dial-up networking according to the present invention will be described in detail with reference to the accompanying drawings. Reference numerals will be omitted and duplicate description thereof will be omitted. In the following description of the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, prior to describing in detail the preferred embodiments of the present invention will be described first with respect to the dial-up network defined in the current mobile communication standard.

2 is a diagram illustrating a configuration of a dial-up network layer formed by a general IS-707 standard. 2, a computer (TE2: Terminal Equipment2) 202, a mobile communication terminal (MT2: Mobile Termination 2) 204, a base station / switch (BS / MSC) 206, network matching device (IWF) Interworking Function 208, Relay Layer 210, 230, 245, 260, 265, 270 of each device, Link Layer 215, 235, 250, 275 of each device, each device Network layers 220, 240, 255, 280, and upper protocol layers 225, 285 are shown. Here, the terms are described based on the contents defined in IS-707.

The computer (TE2: Terminal Equipment 2) 202 may be a PC commonly used by a user, and the mobile terminal 2 (MT2) 204 may be a mobile communication system (e.g., a base station / switcher (BS). / MSC) 206) is a device capable of communicating wirelessly and acting as a modem. An interworking function (IWF) 208 is an intermediate device that connects a base station and an internet network.

The relay layers 210, 230, 245, 260, 265, and 270 contribute to basic data transmission and transmit and receive data in units of bit strings. The link layers 215, 235, 250, and 275 of each device provide error correction that reliably transmits and receives data of the relay layers 210, 230, 245, 260, 265, and 270. It is a layer that functions like flow control, synchronization, and so on. This layer can be either a Point-to-Point Protocol (PPP) or Serial Line Internet Protocol (SLIP) layer. Can be. The network layers 220, 240, 255, and 280 and the upper protocol layers 225 and 285 are protocol layers such as TCP / IP and IP.

In general, PPP is a protocol that is required when two computers communicate using a serial interface, especially in a PC connecting to a server through a telephone line. For example, most Internet server providers (ISPs) provide Internet PPP access for their subscribers, allowing the server to respond to user requests, route through the server to the Internet, and respond to user requests. To send them back to the user. PPP uses IP and provides a data link service corresponding to the second layer when compared to the Open Systems Interconnection (OSI) reference model. Here, PPP encapsulates TCP / IP packets on the computer and forwards them to the server so that they can actually be sent to the Internet.

In addition, SLIP is generally a data link protocol that allows dial-up connections to TCP / IP networks. For example, an Internet service provider's server may provide a SLIP connection that forwards the user's request to the Internet and returns the Internet's response back to the user in response to the user's request. Dial-up connections to servers are usually slower than parallel or multiplexed lines such as T-1 because they use serial lines. SLIP is an older and simpler protocol than PPP. In practical terms, however, there is no big difference between using SLIP or connecting to the Internet through PPP. SLIP delivers IP packets over a serial link such as dial-up.

Rm is a connection interface between a computer (TE2) 202 and a mobile communication terminal (MT2) 204, for example, a connection path between a PC and a terminal such as a serial port / USB. Um is a connection interface between the mobile communication terminal (MT2) 204 and the base station (BS) 206, and is an air interface. L is the connection interface between the base station / switch (BS / MSC) 206 and the network matching device (IWF) 208. In addition, RLP (Radio Link Protocol) is a protocol layer for error correction in wireless data transmission.

Here, when the mobile communication terminal (MT2) 204 receives a dial-up request from the computer (TE2) 202, it opens traffic to the mobile communication system through the PPP information and the RLP. Through this, the computer (TE2) 202 uses an emulator to reset the protocol stack, and is assigned an IP to connect with the base station / switch (BS / MSC) 206 and the network matching device (IWF) 208. do. Here, the emulator attempts to dial up, performs PPP negotiation, sets up a protocol stack, assigns an IP, and performs an authentication procedure. That is, in the dial-up networking, the mobile communication terminal (MT2) 204 is responsible for only the RLP and traffic, and the PPP protocol stack above the PPP is managed by the computer (TE2) 202 and the network matching device (IWF) 208. do.

The present invention relates to a method of modifying such a structure to enable data communication using a dial-up network between a computer (TE2) 202 and a mobile communication terminal (MT2) 204.

3 is a flowchart illustrating a procedure for performing a dial-up network shown in FIG. 2. Referring to FIG. 3, protocol settings performed between a computer (TE2) 202, a mobile communication terminal (MT2) 204, a base station / switch (BS / MSC) 206, and a network matching device (IWF) 208 The procedure is shown.

In step S310, the computer (TE2) 202 transmits an authentication medium (e.g., an ID and password for dial-up) to the mobile communication terminal (MT2) 204. In step S320, the mobile communication terminal (MT2) 204 establishes traffic with the RLP and transmits the corresponding authentication medium to the base station / switch (BS / MSC) 206.

In step S330, the base station / switch (BS / MSC) 206 sends a dial-up response message to the computer (TE2) 202 via the mobile communication terminal (MT2) 204, whereby a dial-up network is established. .

In step S340, a PPP session is established using a Link Control Protocol (LCP) and a PPP Internet Protocol Control Protocol (IPCP), and a TCP / IP session is established. In step S350, an upper protocol is set between the computer (TE2) 202 and the network matching device (IWF) 208. Therefore, the mobile communication terminal (MT2) 204 does not function as a host, but only takes charge of the RLP and traffic.

Here, the Link Control Protocol (LCP) is a protocol for setting up and maintaining a PPP session with the computer (TE2) 202, and the PPP Internet Protocol Control Protocol (IPCP) negotiates whether to assign an IP address with the computer (TE2) 202. Protocol. In other words, IPCP is a network control protocol when using TCP / IP as PPP. It is used to assign an IP address to a remote client or compress a TCP / IP header. It is specified in detail in RFC 1322.

4 is a diagram illustrating configuration of a dial-up network layer according to a preferred embodiment of the present invention. Referring to FIG. 4, a computer (Terminal Equipment 2) (402), a mobile communication terminal (MT2) (404), a relay layer (410, 430) of each device, a link of each device Link layers 415 and 435, network layers 420 and 440 of each device, and upper protocol layers 425 and 445 are shown. The difference from FIG. 2 described above will be mainly described.

The mobile communication terminal (MT2) 404 may be set as a host provided with means for setting a higher protocol therein. That is, the mobile communication terminal (MT2) 404 receives the authentication medium from the computer (TE2) 402, in addition to the general communication means capable of wireless communication with the mobile communication system, receives the authentication medium to the computer (TE2) The authentication unit determines whether the telephone connection is possible at 402, and if the authentication unit determines that the telephone connection is possible, the telephone connection response message is transmitted to the computer TE2 402 when the computer TE2 402 is accessible. The apparatus may further include a session setup unit configured to establish a PPP session and a TCP / IP session with the transmission unit, the computer (TE2) 402. Accordingly, the mobile communication terminal (MT2) 404 according to the present invention may act as a server to establish a TCP / IP connection with the computer (TE2) 402.

Here, the authentication medium may be an ID and a password for dial-up, and the mobile communication terminal (MT2) 404 according to the present invention transmits a dial-up response message when the computer (TE2) 402 is capable of dial-up. The apparatus may further include a mode setting unit configured to set the host mode to transmit to the (TE2) 402. That is, the host mode according to the present invention may be set to a value that can be arbitrarily assigned an at + crm value that designates a current model in a system initialization configuration. In general, since the at + crm value that can be arbitrarily set may be one of 128 to 255, one of the values may be designated to designate a host mode according to the present invention. Accordingly, according to the present invention, the mobile communication terminal (MT2) 204 is not only responsible for RLP and traffic, but functions as a host, thereby performing data communication with the computer (TE2) 402 using a higher layer protocol. Thus, security, speed, stability, scalability and flexibility can be achieved.

FIG. 5 is a flowchart illustrating a procedure for performing a dial-up network shown in FIG. 4. Referring to FIG. 5, a protocol setting procedure performed between a computer (TE2) 402 and a mobile communication terminal (MT2) 404 is shown.

In step S510, the computer (TE2) 402 transmits an authentication medium (e.g., an ID and password for dial-up) to the mobile communication terminal (MT2) 404. The mobile communication terminal (MT2) 404 receives the authentication medium and directly determines whether the computer (TE2) 402 can be dialed up, and if it is determined that the telephone connection of the computer (TE2) 402 is possible, step S520. In, the mobile communication terminal (MT2) 404 sends a dial-up response message directly to the computer (TE2) 402, whereby a dial-up network is established.

In step S530, the Link Control Protocol (LCP) for establishing and maintaining a PPP session between the computer (TE2) 402 and the mobile communication terminal (MT2) 404, and the IPPP (PPP Internet Protocol Control Protocol) negotiating whether to assign an IP address. ) To set up a PPP session and to set up a TCP / IP session. Here, when authentication is required in the setup step, an authentication protocol such as PAP or CHAP may be used. PAP (Password Authentication Protocol) is a form that authenticates by simply comparing text (ID) and password (Password) transmitted from the computer (TE2) 402, CHAP (Challenge Handshake Authentication Protocol) in the terminal When a specific challenge string is sent to a computer (TE2) 402, the computer (TE2) 402 generates a hash generated by MD5 (hash code) using the password and challenge string entered by the user. Answer a hash value, and the terminal compares these hash values to authenticate. The method used in the present invention can support PAP / CHAP which is basically supported by dial-up networking. This method is described in detail in the standards RFC 1334, RFC 1994, and thus the detailed description is omitted here.

In step S540, an upper protocol is set between the computer (TE2) 402 and the mobile communication terminal (MT2) 404. Here, the upper protocol may be an application protocol such as HTTP, FTP, telnet, and the like. Accordingly, the mobile communication terminal (MT2) 404 is not only responsible for RLP and traffic, but functions as a host.

Here, the MT2 404 may program a separate model and form a setting mode in order to directly perform a function as a host. That is, after the mobile communication terminal (MT2) 404 is set to the host mode for transmitting a dial-up response message to the computer (TE2) 402 after authentication in the system setting information, steps S520 to S540 may be performed. To this end, the mobile communication terminal (MT2) 404 may perform the above steps after receiving the authentication medium from the computer (TE2) 402 and further determining whether its system setting information is the host mode.

In addition, the mobile communication terminal (MT2) 204 can be connected to the computer (TE2) 402 by wire, as well as to the above-mentioned telephone connection in a wireless connection. For example, even in a wireless standard such as Bluetooth, the above-described protocols can be set using a telephone connection.

6 is a computer and mobile communication terminal with a dial-up network according to a preferred embodiment of the present invention. Referring to FIG. 6, a networked computer (TE2) 610, 620, 630, 640 and a mobile communication terminal (MT2) 650 are connected to the computer (TE2) 630 by phone. According to FIG. 6, since the mobile communication terminal (MT2) 650 is connected to the computer (TE2) 630 in the form of TCP / IP, the mobile communication terminal (MT2) 650 exists as a network entity (Entity). Can be. Therefore, if higher protocols are established based on this and perform data communication, the data transmission scheme using the telephone connection according to the present invention may have security, speed, stability, scalability, and flexibility.

7 is a diagram illustrating an upper protocol set in a mobile communication terminal in which a dial-up network is formed as an application example according to a preferred embodiment of the present invention. Referring to FIG. 7, an FTP server-client is formed between a terminal and a PC, and the computer 710 that is an FTP client, a Data Serverce / Protocol Service Task 720, and a module for maintaining session information of the client FTP Session Manager (730), FTP Command Processor (740), a module that actually performs commands parsed by the Command Parser, and FTP Authentication module (FTP Authentication). 750, an FTP command parser 760, which is a module (RFC959) that parses the FTP protocol, and an FS task 770, which is a file system task, are shown.

The computer 710 and the DS / PS task (Data Serverce / Protocol Service Task) 720, which is a mobile communication terminal MT2, are TCP / IP connected, and a command channel (a) and a data channel (b) are formed. do. Therefore, the computer 710 and the mobile communication terminal MT2 may use various upper protocols by using TCP / IP.

The method for dial-up networking according to the present invention described above may be performed in combination with a predetermined device, for example, a mobile communication terminal after being stored in a recording medium. Here, the recording medium may be a magnetic or optical recording medium such as video tape, CD, VCD, DVD, or any other medium.

The present invention is not limited to the above embodiments, and many variations are possible by those skilled in the art within the spirit of the present invention.

As described above, the method and apparatus for setting up dial-up networking according to the present invention have an effect of basically solving the security problem, speed problem, and stability problem in the conventional RS-232 communication.

In addition, the method and apparatus for setting up dial-up networking according to the present invention have the effect of having scalability and flexibility by configuring a terminal as an independent network entity on a network.

In addition, the method and apparatus for setting up dial-up networking according to the present invention have the effect of minimizing the cost and time for the application of the technology by making the most of the existing terminal technologies.

In addition, the method and apparatus for setting up dial-up networking according to the present invention enable the networking of a terminal when communicating with an external device by controlling and using mobile communication terminal resources, thereby having unlimited scalability and flexibility. .

In addition, since the method and apparatus for setting up dial-up networking according to the present invention use PAP / CHAP, which is an international standard security method, in the initial setting stage, the security is high, and the communication speed is TCP / IP window control. This method is very fast, and the standard protocol uses TCP / IP, so that communication applications of various purposes can be easily loaded.

In addition, the method and apparatus for setting up dial-up networking according to the present invention can be used to remotely control and use the resources of the terminal as the terminal is established as a network entity, and the terminal can access the network for protocol setting. There is no need, and if you support dial-up almost independently of the operating system (OS) on the PC side, it is easy to apply.

In addition, the method and apparatus for setting up dial-up networking according to the present invention can be applied to any technology (eg, Bluetooth, PDA, etc.) that supports dial-up, and the data service application software (eg, mounted on the terminal) Browser, VOD, etc.) can also provide a methodology to easily develop a data service program by installing a service server on a local PC, using a generalized higher protocol such as HTTP, FTP, etc. Applications can be used immediately with little modification.

Although the above has been described with reference to a preferred embodiment of the present invention, those of ordinary skill in the art to the present invention without departing from the spirit and scope of the present invention and equivalents thereof described in the claims below It will be understood that various modifications and changes can be made.

Claims (12)

A method for dial-up networking in a mobile communication terminal connected to a computer and capable of communicating with a mobile communication system, the method comprising: (a) receiving an authentication medium from the computer; (b) receiving the authentication medium to determine whether the computer can be dialed in; (c) transmitting a dial-up response message to the computer if the computer is accessible as a result of the determination; (d) establishing a PPP session with the computer; And (e) establishing a TCP / IP session with the computer. The method of claim 1, Step (d) is, (d-1) establishing a Link Control Protocol (LCP) that establishes and maintains a PPP session with the computer; And (d-2) establishing an Internet Protocol Control Protocol (IPCP) for negotiating whether to assign an IP address with the computer. The method of claim 1, And said authentication medium comprises an ID and a password for dial-up connection. The method of claim 1, (f) setting the mobile communication terminal to a host mode for transmitting the dial-up response message to the computer after authentication in system setting information; And (g) determining whether the system setting information is a host mode after receiving an authentication medium from the computer, And performing the step (b) when the system setting information is a host mode. The method of claim 4, wherein Step (f) is, (h) at + crm of the configuration information of the mobile communication terminal further comprises the step of setting to have a value of any one of 128 to 255. The method of claim 1, and (i) establishing a higher protocol with the computer after establishing the TCP / IP session. The method of claim 6, And said higher protocol is HTTP or FTP. A mobile communication terminal connected to a mobile communication system for mobile communication and capable of dial-up networking connected to a computer, A receiving unit for receiving an authentication medium from the computer; An authenticator configured to receive the authentication medium and determine whether the computer can be dialed up; A transmitter for transmitting a telephone connection response message to the computer when the authentication unit determines that the computer can be connected to the telephone; And And a session establishment section for establishing a PPP session and a TCP / IP session with the computer. The method of claim 8, And said authentication medium comprises an ID and a password for dial-up connection. The method of claim 8, And a mode setting unit configured to set a host mode to transmit a dial-up response message to the computer when the transmission unit is able to access the computer. The method of claim 8, And the receiving unit and the transmitting unit are wirelessly connected to the computer. In the recording medium which can be read by the mobile communication system, a program of instructions is tangibly embodied, which is tangibly embodied for carrying out a method of dial-up networking in a mobile communication terminal connected to a computer and capable of communicating. (a) receiving an authentication medium from the computer; (b) receiving the authentication medium to determine whether the computer can be dialed in; (c) transmitting a dial-up response message to the computer if the computer is accessible as a result of the determination; (d) establishing a PPP session with the computer; And (e) a recording medium storing a program for performing a step of establishing a TCP / IP session with the computer.

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