KR100639241B1 - Apparatus of link ethernet with modem for internet - Google Patents

Abstract

An Ethernet connecting device using a modem is provided to enable a modem user to do web surfing by accessing the Internet, even though the user is not connected with an ISP(Internet Service Provider) or a modem pool which provides an Internet access service. A terminal(50) is mounted with a modem for sending an Internet access request signal via a subscriber line. When receiving the Internet access request signal, an exchange(52) is switched and allocates a line to transmit the access request signal to a high-speed sub highway. When receiving the Internet access request signal, a modem/Ethernet converter(54) processes an Internet access procedure with the modem of the terminal(50), converts data received from the modem into packets, and properly converts the packets according to the Ethernet protocol to send/receive the converted packets.

Description

Apparatus of link Ethernet with modem for internet}

1 is a configuration for connecting to the Internet using a conventional modem,

2 is a flow chart for connecting to the Internet with a terminal equipped with a conventional modem,

3 is a block diagram of an Ethernet connection device using a modem of the present invention,

4 is a detailed view of the Ethernet connection device of FIG.

5 is a detailed configuration diagram of a modem / ethernet converter of the present invention;

6 is a flowchart illustrating an operation of internet access using a modem and an Ethernet connection device of the present invention.

<Description of Major Symbols in Drawing>

30, 50: terminal equipped with a modem 52: switchboard

54: modem / Ethernet converter 60: subscriber board

62: TDM switch 70: modem end

72: processor unit 74: Ethernet connection unit.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to the use of an Internet service as a modem to communicate with a computer terminal, and is not connected to a modem pool or an Internet service provider (ISP) that provides a modem access service. The present invention relates to an Ethernet connection device using a modem capable of surfing the web even when not connected.

In general, the Internet is a worldwide computer network system, which is a network of networks in which a user can access and obtain information from any other computer. The Internet was born in 1969 by the US Government's Advanced Research Projects Agency (ARPA), originally known as ARPANet. The original goal of the Internet was to create a network where users of research computers at one university could communicate with users of research computers at another university. One of the by-products of the ARPANet design is that messages can be split in more than one direction or routed in different directions, so they can function even if part of the network is destroyed by an enemy military attack or other disaster. .

Today, the Internet is a collaborative, self-sustaining facility for the entire masses, accessible to billions of people worldwide. The Internet physically utilizes some of the total resources of existing public telephone networks and is distinguished from others by using a series of protocols, technically called TCP / IP. Two recent changes in Internet technology are intranets and extranets, which also use the TCP / IP protocol.

Methods of connecting to the Internet include an IP connection using a dedicated line and a dial-up IP connection using a telephone line. Internet users need the consent of the gateway computer owner and the IP address assigned by the national network information center (NIC). However, this procedure is simple when using an Internet access service. In Korea, the Korea Network Information Center (KRNIC) of the Korea Computer Center is in charge of IP address assignment and domain registration. Since KT first launched the KORNET service in June 1994, many Internet Information Providers (ISPs) have been created to provide commercial services to the general public.

Recently, many users access the Internet through a dedicated communication line, but ISPs (Internet Service Providers) that provide Internet access services do not provide a dedicated line service for the entire region.

Hereinafter, a conventional modem user connects to the Internet with reference to the drawings.

FIG. 1 shows a configuration for connecting to the Internet using a conventional modem, and FIG. 2 is a flowchart for connecting to the Internet with a terminal equipped with a conventional modem.

1 shows an ISP server (modem pool) 28 that provides a connection service so that a computer terminal equipped with a modem 20, an exchanger 22 and 26, and a modem 20 can be connected to the Internet.

An ISP connected to the Internet using a computer terminal equipped with a modem 20. The modem is connected to an analog telephone line and transmits a call signal. The ISP is connected to an E1 dedicated line through a modem pool provided through the switches 22 and 26. Modem connection is made to the server 28.

After connecting to the ISP server 28 using a computer terminal, the network authentication operation is performed, and the Internet is connected to the Internet by using PPP (Point to Point) or SLIP (Serial Line Internet Protocol).

PPP is used in PCs where modem users connect to the server through a telephone line.

For example, most Internet service providers (ISPs) provide Internet PPP access for their subscribers, allowing servers to respond to user requests and surf the Internet through those servers. You can do things like send a response back to the user. PPP uses IP, which forwards the computer's TCP / IP packets to the server so that they can actually be sent to the Internet. PPP uses one of the variants of a high-level data link control procedure (HDLC) for packet encapsulation. PPP is rated better than the Serial Line Internet Protocol (SLIP) because it can handle not only asynchronous communications but also synchronous communications. PPP can share a line with other users, and even has error detection, a feature not found in SLIP, so PPP is better if you can choose to.

When connecting to the Internet using a computer terminal equipped with a conventional modem 20, several switchboards 22 and 26 are typically connected to an ISP server 28 via a public switched telephone network (PSTN). Since the connection is made, the round trip delay time during which the request signal is transmitted and the response signal is received is long, and there is a problem in the stability of data communication.

In addition, communication between several exchanges 22 and 26, which are connected via a public switched telephone network (PSTN), is connected by trunks, which are lines between switching stations. The trunk is a large-capacity telephone channel installed between two telephone exchange systems that can handle voice and data signals simultaneously due to its wide bandwidth. In the case of using a large number of Internet accesses with a modem, the processing capacity of the switchboard must be greatly increased.

Due to the characteristics of the Internet connection using the conventional modem 20, the modem signal is distorted through a number of switches or the specified maximum speed (56 kbps) cannot be guaranteed, and is connected to the Internet using a computer terminal equipped with the modem 20. In addition to the call charges, monthly fees are paid to the providers of Internet access services.

2 is a flow chart of a conventional modem-equipped terminal for connecting to the Internet. When a modem-equipped terminal is connected to the ISP server 28 (modem pool), the connection is made like a general data modem. (S30-S32).

When the modem pool 28 processes authentication, a subscriber authentication procedure is performed (S34).

Next, between the modem pool 28 and the terminal equipped with the modem 20, LCP (Link Control Protocol) determines whether or not to use PPP packet compression, and assigns IP assignment and DNS address using IPCP (IP Control Protocol). When the IP compression decision is made, the Internet is connected via the modem pool 28 and the Internet is used by the modem. (S36-S40).

When connecting to the Internet using a conventional modem, it must be connected to the switch connected to the modem pool 28, so it goes through a number of exchanges, and goes through a number of switches, the connection to the trunk network during the exchange period occupies the voice call channel, delay time This problem is large and causes various problems such as disconnection during data communication.

As described above, in the case of connecting to the Internet via a telephone line using a computer terminal equipped with a conventional modem, an Internet connection fee must be paid in addition to the call charge, and there are many signal distortions through many switches when connecting to the Internet. The data communication time cannot guarantee the set speed, and there is a problem in that the line is wasted because it is connected by occupying the voice call line of the exchange.

The present invention has been made to solve the above-mentioned problems, the terminal is connected to the Internet via a telephone line using a modem when connecting to the Internet by connecting the Ethernet connection device to the Internet without going through a plurality of exchanges without the ISP server An object of the present invention is to provide an Ethernet connection device using a modem that can access the Internet, thereby increasing the efficiency of the exchange and reducing the cost of using the Internet.

According to the present invention, a subscriber board and a TDM switch are provided to an exchanger when connecting to the Internet using a terminal equipped with a modem, and a modem / Ethernet converter is connected to directly connect to the Internet without going through several exchanges to increase transmission speed. It is an object of the present invention to provide an Ethernet connection device using a modem that saves the voice line of an exchange.

An Ethernet connection apparatus using a modem of the present invention includes a terminal equipped with a modem for transmitting an internet connection request signal via a subscriber line, and switching to a high speed subhighway by switching and allocating a line when receiving the internet connection request signal from the terminal. A switch that transmits the access request signal, and when the internet access request signal is received at the exchange, processes an internet access procedure with a modem of the terminal, converts data transmitted and received from the modem into a packet, and converts the packet into an Ethernet protocol. It is characterized in that it comprises a modem / Ethernet converter for converting, transmitting and receiving as appropriate.

In addition, the exchange is a subscriber board for processing the Internet call transmitted from the terminal and allocating a line, and a switch for allocating and switching the Internet line to the terminal by receiving a control signal transmitted from the subscriber board as a sub highway, which is a high-speed line Includes more wealth.

In addition, the modem / ethernet converter of the present invention recognizes a terminal transmitting an internet access request signal through the switch, and performs a modem terminal for performing an internet access procedure, and controls the modem terminal and transmits and receives data transmitted from the terminal. It further comprises a processor for converting the packet into a packet, and an Ethernet connection for coding and transmitting the packet converted by the processor in accordance with the Ethernet standard, and decoding and providing data received by Ethernet.

Hereinafter, an embodiment of an Ethernet connection apparatus using a modem of the present invention will be described in detail with reference to the accompanying drawings.

3 is a configuration diagram of the Ethernet connection device using a modem of the present invention, Figure 4 is a detailed view of the Ethernet connection device of Figure 3, Figure 5 is a detailed configuration diagram of the modem / Ethernet converter of the present invention, Figure 6 Connection flow chart using a modem and an Ethernet connection device of the present invention.

The present invention provides authentication, internet access procedure, and data transmitted from a modem to an Internet server, and relays data transmitted from an Internet server to a terminal equipped with a modem. The modem / Ethernet converter to handle what was previously provided, and also reduces the connection of multiple exchanges when connecting to the Internet, and connects to the Internet without using the trunk line of the exchange, thereby reducing the cost of using the Internet and improving the efficiency of the exchange. Improve.

2 shows a modem 50 equipped with a modem, a switch 52 connected to a subscriber line, and a modem / ethernet converter 54 which provides an Internet connection by using an Ethernet connection.

Switch 52 is provided with subscriber board 60, TDM switch 62, connected to each other by sub-highway to process at high speed, and modem / ethernet converter 64 connected to switch 52 is also connected by high-speed subhighway. . The high speed subhighway is a line that is faster in speed or processing than a conventional two-wire spiral or twisted line.

When the exchange signal is received from the terminal 50, the switch 52 processes the Internet call in the subscriber board 60 and allocates a line, and the TDM switch unit 62 receives the control signal from the subscriber board 60 to receive the corresponding signal. Switch to the line to access the Internet.

In the conventional case, though the plurality of exchanges 52 are used, the present invention does not need to go through multiple exchanges by directly connecting the modem / ethernet converter 54 connecting to the Internet to the exchange 52, so that the delay time is increased. Shorter, and communication speed is improved.

In addition, since a plurality of exchanges are connected by a trunk to eliminate the use of the Internet by occupying the voice line, there is a margin of voice line of the exchange.

Modem / Ethernet converter 54 is specifically comprised of modem termination 70, processor 72, and Ethernet connection 74.

When the modem / ethernet converter 54 recognizes the terminal 50 that transmits the Internet connection request signal via the switch 52, it performs the Internet connection procedure and converts the data received from the terminal 50 into a packet. After converting the data into a format that conforms to the Ethernet LAN standard, it is connected to an Internet service site and processed to use the Internet.

Specifically, the modem / ethernet converter 54 includes a modem terminal 70 and a modem terminal for processing an internet access procedure via a modem of a terminal 50 such as a computer or a notebook, and a TDM switch 62 of an exchange 52. The processor unit 72 converts the data transmitted and received to the unit 70 into a packet, and the Ethernet connection unit 74 converts and transmits the packet converted in accordance with the Ethernet standard to use the Internet. .

In addition, the terminal 50 may utilize the Internet by converting data received from the Internet server via the Ethernet in the modem / Ethernet converter 54.

Ethernet mainly uses CSMA / CD (carrier sense multiple access with collision detection) protocol as medium access control (MAC) as local area network, and multi-access, carrier detection using similar protocols such as CSMA / CA and CSMA / CDCR protocols. In addition, it provides collision detection and provides a line with a speed of 10Mbps to 100Mbps, and transmits and receives data using a token ring method. Gigabit Ethernet is around 1,000 Mbps, supporting higher levels of backbone speed.

 In the conventional case, the user can access the Internet without connecting from the ISP server, which is necessary when connecting to the Internet using a modem by connecting to a telephone line, so that authentication procedures and the like can be omitted, and the user can utilize the Internet with only data call charges. In addition, unlike the related art, it is connected to the Internet without passing through several exchanges, thereby reducing switching and delay time, making the Internet connection stable, and improving the speed of the modem.

An operation of connecting to the Internet using an Ethernet connection device using a modem of the present invention will be described.

When the user transmits an Internet connection request signal to the terminal 50 equipped with the modem, the subscriber board 60 of the exchange 52 processes the Internet call and allocates the line, and the sub-highway, which is a high-speed line, is used. The TDM switch unit 62 receives the control signal from the subscriber board 60, switches to the corresponding line, and transmits an Internet connection request signal to the modem / Ethernet converter 54 via the sub-highway. Is sent.

When the modem / Ethernet converter 54 receives the Internet connection request signal, the modem terminal 70 recognizes the terminal 50 equipped with the user's modem and executes the designated connection procedure.

Thereafter, a packet is transmitted to and received from the modem mounted in the terminal 50 through a processor controlling the modem terminal 70, and the packet is usually using a PPP high-level data link control procedure (HDLC) format. Attempt a point-to-point protocol (PPP) connection.

The processor 72 that controls the modem terminal 70 receives the PPP packet from the terminal 50 and performs the PPP negotiation for authentication and network status. (74). In the Ethernet connection, the subscriber converts the data into a format suitable for the Ethernet protocol, and the subscriber connects to the Internet network and surfs the web.

In addition, the present invention can also provide an Internet service by incorporating a modem / Ethernet converter in the switch 52.

In the case of a typical 56k modem, the subscriber has a downlink speed of up to 56kbps and an upstream speed of 24kbps, so when using 100M Ethernet, at least 1780 subscribers can be provided with an Internet access service without an ISP server. An average of 24kbps can provide internet service to 4000 subscribers.

6 is a flowchart illustrating a connection operation using a modem and an Ethernet connection device of the present invention.

The present invention uses the Internet by connecting the modem / Ethernet converter 54 to the exchange 52, directly connected to the Internet without a plurality of exchanges and a modem pool, so that the speed is improved and does not use the trunk network of the exchange period There is no waste of voice and data channels, and modem users reduce the cost of paying service providers for Internet access.

First, the modem 50 is sent to the terminal equipped with the modem 50, and the modem / Ethernet converter 54 is connected via the switch 52 to perform modem negotiation (S80 and S82).

Since the exchange 52 and the modem-to-Ethernet converter 54 are connected to the TDM subhighway without using a trunk network, it reduces voice and data lines of the exchange, and is directly connected without passing through a plurality of exchanges. The internet can be improved and reliably.

As a connection procedure, PPP negotiation is performed between the modem 50 and the modem / ethernet converter 54, and the RFC1172 standard is used as the link control protocol (LPD).

 Encoding data in PPP can be much longer than actual data, so it is necessary to decide whether to disable or compress some features of the PPP header that do not play a role after connecting to the actual PPP. It is a protocol (S84).

Next, PPP negotiation is performed between the modem 50 and the modem / ethernet converter 54 by IPCP (IP Control Protocol) (S86).

IP Control Protocol (IPCP) uses the RFC1172 specification. Modem A protocol used to determine the assignment of IPs, default gateways, subnet masks, and DNS (Domain Name Server) addresses and IP compression for use by modem subscribers.

When the above PPP procedure is made, the user utilizes the Internet as a terminal equipped with the modem 50 (S88).

By using the above-described Ethernet connection device of the present invention, a connection device such as a gateway or an inter working function (IWF) that handles connection and relay between different networks for a modem user can be easily implemented. You can connect to the internet.

When the above-described Ethernet connection device of the present invention is provided on the subscriber board of the exchange, the trunk line of the exchange occupied for data communication is not used, so that the necessary voice resource can be used more efficiently.

Modem users can use the Internet even if they do not subscribe to the ISP server (modem pool) that provides Internet access service. Also, the modem is connected to the Internet through Ethernet after one switching via the subscriber board. There is an effect that the Internet communication is more reliable.

In addition, subscribers who use the Internet using a modem do not need a separate authentication process to provide convenience to modem users and have an effect of connecting without going through a plurality of exchanges.

Claims (3)

A terminal equipped with a modem for transmitting an internet access request signal via a subscriber line; A switch for switching when receiving the Internet connection request signal from the terminal, allocating a circuit, and transmitting the connection request signal to a high speed subhighway; When the Internet connection request signal is received at the exchange, the terminal processes an internet access procedure with a modem of the terminal, converts data transmitted and received from the modem into a packet, converts the packet into an Ethernet protocol, and transmits and receives it. Ethernet connection device using a modem, characterized in that it comprises a modem / Ethernet converter. The method of claim 1, The exchanger A subscriber board for processing an internet call sent from the terminal and allocating a line; And a switch unit configured to receive a control signal transmitted from the subscriber board through a sub highway, which is a high speed line, to allocate and switch an internet line to the terminal. The method according to claim 1 or 2, The modem / ethernet converter A modem terminal for performing an internet access procedure upon recognizing a terminal transmitting an internet access request signal through the switch; A processor unit controlling the modem termination unit and converting data transmitted and received from the terminal into a packet; And an Ethernet connection unit for coding and transmitting the packet converted by the processor unit in accordance with the Ethernet standard, and decoding and providing data received through the Ethernet.

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