KR20010047191A - Transmission and receipt data processing method for internet access by means of Universal Serial Bus - Google Patents

Abstract

PURPOSE: A method for processing transceiving data for an internet connection through a universal serial bus is provided to simplify a protocol structure of a PC host system for an internet connection through a USB by defining a new protocol structure which puts an IP class as the superior class of a segment design class. CONSTITUTION: USB communication devices(320,340) basically include USB drivers(323,343), USB interface firmware(322,342) and USB controllers(321,341). IP classes(325,345) are set to the superior class of segment design classes(324,344). A USB and an internet network are intermediated through the IP classes(325,345). The IP classes(325,345) are protocol classes which define communication agreements between nodes in a TCP/IP protocol structure.

Description

Transmission and receipt data processing method for internet access by means of Universal Serial Bus}

The present invention relates to an internet connection method, and more particularly, to an internet connection method using a universal serial bus (hereinafter referred to as USB).

USB, a universal serial bus, provides an interface to computers and peripherals such as audio players, joysticks, keyboards, phones, scanners, and printers. Initially, the USB application field was limited to simply connecting a peripheral device of a PC, but gradually, a USB terminal device supporting a connection to the Internet, for example, a USB-to-Ethernet converter, has been developed.

FIG. 1 schematically illustrates a network structure for accessing the Internet 100 from a PC host system 140 through a USB terminal device 120 that supports access to the Internet.

As shown in FIG. 1, the PC host system 140 is connected to a USB terminal device or an access network terminal 120 through a USB 130, and the USB terminal device 120 connects to an Internet access network 110. It is connected to a public network such as the Internet 100 through. Here, the PC host system 140 is a general computer supporting USB, and the USB terminal device 120 is a set top box (STB), a cable modem, an asynchronous digital subcriber line (ADSL) modem, and a USB ethernet supporting USB. (ethernet) devices and the like can be used. The internet access network 110 may be configured of a coaxial cable, a general telephone line, or the like according to the type of the USB terminal device 120.

FIG. 2 schematically illustrates a protocol structure for connecting to the Internet through USB in a conventional PC host system 240 and a USB terminal device 220.

As shown in FIG. 2, all of the USB communication devices 220 and 240 basically include USB drivers 223 and 243, USB interface firmware 222 and 242, and USB controllers 221 and 241 as USB-related parts. do. Here, the USB driver 223, 243 is a software driver module that is responsible for driving the operation of the USB unique, USB interface firmware (222, 242) is an interface module with the USB controller (221, 241), USB controller (221, 241) ) Is a USB hardware chip.

In the current USB class definition (version 1.1) for the communication device, the MAC (Medium Access Control) layer (227, 247) is defined as the upper layer of the segment delineation layer (224, 244). Layers 227 and 247 define an ATM Adaptation Layer (AAL) that performs segmentation and reassembly (SAR) for an ATM cell with the MAC layer of the Ethernet and the Asynchronous Transfer Mode (ATM) adaptation layer. Here, the MAC layers 227 and 247 are layers that perform access control on a transmission medium used for connection with a communication network such as the Internet. The segment design layers 224 and 244 divide and recombine upper MAC frames into USB transmission units or USB packet sizes.

The process of transmitting data to the Internet through the USB terminal device 220 in the conventional PC host system 240 is as follows. Once the MAC frame is formed in the PC host system 240, SAR is performed on the MAC frame, and the data is made into a USB packet and sent to the USB terminal device 220. The USB terminal device 220 reconstructs a MAC frame by performing SAR on the USB packet transmitted from the PC host system 240 and transmits data to a destination node on the Internet through the Internet access network.

Therefore, according to the conventional method, the protocol of the MAC layer 247 to be supported by the PC host system 240 should be different according to the type of the Internet access network connected to the USB terminal device 220. That is, when using Ethernet as the Internet access network and when using ATM, the protocol of the MAC layer 247 used in the PC host system 240 should be different. In particular, in the case of ATM, there is a problem in that the PC host system 240 and the USB terminal device 220 must perform SAR for an ATM cell.

The technical problem to be solved by the present invention is to solve the above problems, to define a new protocol structure to put the IP layer on top of the segment design layer in the PC host system and the USB terminal device, USB in this new protocol structure The present invention provides a method of processing transmission and reception data for Internet access through a computer and a recording medium recording a program implementing the same.

1 schematically illustrates a network structure for accessing the Internet from a PC host system through a USB terminal device.

2 schematically illustrates a protocol structure in a conventional USB communication device.

3 and 4 schematically show a protocol structure in a USB communication device according to an embodiment of the present invention.

5 is a flowchart illustrating a method of processing transmission data for connecting to the Internet via USB according to a preferred embodiment of the present invention.

6 is a flowchart illustrating a method of processing received data for connecting to the Internet via USB according to a preferred embodiment of the present invention.

In order to solve the above technical problem, the present invention provides a method for processing transmission data in a PC host system for accessing the Internet through a universal serial bus according to one aspect of the present invention. A method of processing transmission data for accessing the Internet from a PC host system through a USB terminal device connected to the device, the method comprising: (a) configuring transmission data to be transmitted to a destination node on the Internet from the PC host system into an IP packet; (b) constructing the IP packet configured in step (a) directly into a USB transmission unit; And (c) reconfiguring the USB transmission unit configured in step (b) into an IP packet through the USB terminal device connected with USB and transmitting the IP packet to a destination node on the Internet.

Also, in the step (c), it is preferable to reconstruct the IP packet by converting the private network IP network address into a public network IP network address through the USB terminal device.

According to another aspect of the present invention, there is provided a method of processing transmission data in a USB terminal device for accessing the Internet through a universal serial bus, which is connected to a PC host system through a USB, which is a universal serial bus providing an interface to a computer and a peripheral device. A method of processing transmission data for accessing the Internet at a terminal device, the method comprising: (a) receiving, at the USB terminal device, transmission data to be transmitted to a destination node on the Internet from the PC host system; (b) configuring the transmission data received in step (a) into an IP packet; (c) configuring the IP packet configured in step (b) into a transmission frame according to the type of Internet access network used to access the Internet from the USB terminal device; And (d) transmitting the transmission frame configured in step (c) to a destination node on the Internet through the Internet access network.

In addition, the step (c), when the type of the Internet access network is Ethernet, when the IP packet is configured as an Ethernet transmission frame, and the type of the Internet access network is ADSL is an asynchronous digital subscriber line, It is preferable to configure an IP packet in an ADSL transmission frame.

According to another aspect of the present invention, there is provided a method of processing transmission data for an Internet connection through a universal serial bus, which is connected to a PC host system and a USB terminal device interconnected by a USB, which is a universal serial bus that provides an interface to a computer and a peripheral device. CLAIMS 1. A method of processing transmission data for accessing a network, the method comprising: (a) constructing transmission data to be transmitted from a PC host system to a destination node on the Internet in an IP packet; (b) constructing the IP packet configured in step (a) in a direct USB transmission unit and transmitting the USB packet to the USB terminal device through USB; (c) receiving data from the PC host system via USB at the USB terminal device; (d) reconstructing the data received in step (c) into an IP packet; And (e) configuring the IP packet configured in step (d) into a transmission frame according to the type of an internet access network used to access the internet from the USB terminal device, and transmitting the same through the internet access network. It features.

In order to solve the above other technical problem, a method of processing received data in a USB terminal device for accessing the Internet through a universal serial bus according to an aspect of the present invention is a universal serial bus that provides an interface between a computer and a peripheral device. A method of processing received data for accessing the Internet from a USB terminal device connected to a PC host system via USB, the method comprising: (a) transmitting data transmitted from a source node on the Internet to the PC host system from the USB terminal device; Receiving through an internet access network used to access the internet from a terminal device; (b) extracting an IP packet from the data received in step (a); (c) configuring the IP packet extracted in the step (b) to a USB transmission unit; And (d) transmitting the USB transmission unit configured in step (c) to the PC host system via USB.

According to another aspect of the present invention, a method of processing received data in a PC host system for accessing the Internet through a universal serial bus is provided through a USB terminal device connected via USB, which is a universal serial bus that provides an interface to a computer and a peripheral device. A method of processing received data for accessing the Internet in a host system, the method comprising: (a) receiving data transmitted from a source node on the Internet through the USB terminal device connected through the USB at the PC host system; (b) constructing the received data in the form of USB transmission unit in step (a) directly into an IP packet; And (c) delivering the IP packet configured in step (b) to a corresponding application program on the PC host system through an upper layer of the IP layer.

According to another aspect of the present invention, there is provided a method of processing received data for accessing an Internet through a universal serial bus, which is connected to a USB terminal device and a PC host system interconnected by a USB, which is a universal serial bus that provides an interface to a computer and a peripheral device. A method of processing received data for accessing a network, the method comprising: (a) establishing an Internet access network used for accessing the Internet from the USB terminal device to data transmitted from a source node on the Internet to the PC host system in the USB terminal device; Receiving through; (b) extracting an IP packet from the data received in step (a); (c) configuring the IP packet extracted in the step (b) in a USB transmission unit and transmitting it to the PC host system via USB; (d) receiving data from the USB terminal device via USB in the PC host system; And (e) configuring the data received in the form of USB transmission unit in step (d) directly into an IP packet, and delivering the data to a corresponding application program on the PC host system through an upper layer of the IP layer. It features.

In order to solve the above other technical problem, a computer-readable recording medium on one side of the present invention is (a) a USB terminal connected to a PC host system via a universal serial bus that provides an interface to a computer and a peripheral device. Receiving via USB the transmission data to be transmitted from the PC host system to a destination node on the Internet in the device for processing the transmission data for accessing the Internet; (b) configuring the transmission data received in step (a) into an IP packet; (c) configuring the IP packet configured in step (b) into a transmission frame according to the type of Internet access network used to access the Internet from the USB terminal device; And (d) recording a program for executing by the computer the step of transmitting the transmission frame configured in step (c) to a destination node on the Internet through the Internet access network.

According to another aspect of the present invention, a computer-readable recording medium includes (a) received data for accessing the Internet from a USB terminal device connected to a PC host system via USB, a universal serial bus providing an interface to a computer and a peripheral device. Receiving data transmitted from a source node on the Internet to the PC host system through an internet access network used for accessing the Internet by the USB terminal device; (b) extracting an IP packet from the data received in step (a); (c) configuring the IP packet extracted in the step (b) to a USB transmission unit; And (d) recording a program for executing by the computer the step of transferring the USB transfer unit configured in step (c) to the PC host system via USB.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the preferred embodiment of the present invention.

3 and 4 schematically illustrate a protocol structure for connecting to the Internet through USB in a PC host system and a USB terminal device according to an embodiment of the present invention. 3 illustrates the case of using Ethernet as the Internet access network, and FIG. 4 illustrates the case of using ADSL or ATM as the Internet access network. First, referring to FIG. 3, a case of using Ethernet as an internet access network will be described first.

As shown in FIG. 3, the USB communication devices 320 and 340 according to the embodiment of the present invention are basically USB drivers 323 and 343 and USB interface firmware that perform USB-related functions, as shown in FIG. 2. 322, 342 and USB controllers 321, 341.

However, in the present embodiment, unlike the conventional method, the IP layers 325 and 345 are provided as the upper layers of the segment design layers 324 and 344, and the USB and the Internet access networks are mediated through the IP layers 325 and 345. do. Here, the IP layers 325 and 345 are protocol layers that define an inter-node communication protocol in a Transmission Control Protocol / Internet Protocol (TCP / IP) protocol structure mainly used in the Internet. The protocol structure of the USB terminal device 320 according to the present embodiment focuses on the aspect that most of the USB terminal device 320 supports the IP layer 325 for accessing the Internet. In addition, the protocol structure in the PC host system 340 according to the present embodiment is a simple structure that does not include the MAC layer associated with the Internet access network used to access the Internet through the USB terminal device 320.

In this embodiment, the segment design layers 324 and 344 have the IP layers 325 and 345 as upper layers, and perform a SAR function of directly dividing and recombining IP packets instead of conventional MAC frames into USB transmission units. .

Accordingly, the protocol structure for supporting Internet access through USB in the PC host system 340 according to the present embodiment may include the USB-related portions 341, 342, and 343 and the IP layer 345 and SARs for connecting them. It includes a segment design layer 344 to perform, and has the same protocol structure regardless of the type of Internet access network connected to the USB terminal device (320).

The protocol structure for supporting Internet access through USB in the USB terminal device 320 according to the present embodiment includes parts 326, 327, and 329 for supporting a connection with an Internet access network, and a USB related part 321. 322, 323, and an IP layer 325 that mediates them, and a segment design layer 324 that directly performs SAR between IP packets and USB transmission units. Here, the portions 326, 327, and 329 for supporting the connection with the Internet access network may include, for example, an upper link layer 326 such as Logical Link Control (LLC) or Point-to-Point Protocol (PPP) and IEEE802. .3 MAC layer 327, which defines an approach to communication media in accordance with standard protocols, and physical layer 329, which defines a physical Ethernet cable communication specification.

So far, a case of using Ethernet as an internet access network has been described, and a case of using ADSL or ATM as an internet access network will be described with reference to FIG. 4.

Upper link layer 426, IP layer 425, 445, segment design layer 424, 444, USB driver 423, 443, USB interface firmware 422, 442, such as LLC or PPP in FIG. And the USB bus interface or the USB controllers 421 and 441 perform the same functions as in FIG. 3. 3 and 4 differ only in portions 427, 428, 429a, and 429b directly related to ATM or ADSL, which is the Internet access network in FIG. The ATM adaptation layer (AAL) 427 performs convergence sbulayer (CS), splitting and recombination functions, and the ATM layer 428 performs flow control and connection establishment for asynchronous transmission. The TC (Transmission Convergence) layer 429a performs a function of generating and restoring a transmission frame, and the ADSL layer 429b is a physical layer that defines a communication standard of a physical ADSL telephone line.

So far, the protocol structure in the PC host system and the USB terminal device according to the embodiment of the present invention has been described. Subsequently, with reference to FIGS. 5 and 6, the processing of the transmit / receive data in the protocol structure according to the embodiment of the present invention. The method will be described. First, with reference to FIG. 5, the processing method of transmission data is demonstrated first.

5 is a flowchart illustrating a method of processing transmission data for accessing the Internet through USB according to a preferred embodiment of the present invention, and shows a process of transmitting data to the Internet through a USB terminal device in a PC host system.

First, when a USB terminal device is first connected to a PC host system through USB, the USB terminal device undergoes an initialization process according to a communication class interface (not shown). In this process, information such as a class of a USB terminal device, a size and a bandwidth of a USB packet are exchanged. Only after the initialization process is completed can data be transmitted and received via USB between the PC host system and the USB terminal device.

When the initialization process is completed, if there is data to be transmitted from the PC host system to the destination node on the Internet, it is configured as an IP packet (step 500). The packet header of the IP packet configured in step 500 may include a private network IP network address or a public network IP network address according to the type of network address used in the local area network (LAN) to which the PC host system is connected. Can be.

Next, the USB terminal device performs SAR directly on the IP packet without performing the process of configuring the IP packet into the MAC frame through the MAC layer depending on the type of the Internet access network used to access the Internet. It is configured as a unit or a USB packet (step 510), and transmits the USB packet to the USB terminal device via USB (step 520).

The USB terminal device receives a USB packet from the PC host system via USB (step 530), performs a SAR on the USB packet, and reconfigures it into an IP packet (step 540). In step 540, when the packet header of the IP packet configured in step 500 includes the private network IP network address, it is preferable to convert the private network IP network address into a public network IP network address to configure the IP packet.

Next, the USB terminal device configures the IP packet reconstructed in step 540 into a transmission frame according to the type of the Internet access network (step 550), and transmits it to a destination node on the Internet through the Internet access network (step 560). If the type of the Internet access network is Ethernet, the IP packet is composed of an Ethernet transmission frame, that is, an IEEE802.3 MAC frame. In addition, when the type of the Internet access network is ATM or ADSL, the SAR is also performed to configure an IP packet into an ADSL transmission frame, for example, an ATM cell.

The transmission data processing method according to the embodiment of the present invention has been described so far, and the processing method of the reception data according to the embodiment of the present invention will be described with reference to FIG. 6.

6 is a flowchart of a method of processing received data for connecting to the Internet via USB according to a preferred embodiment of the present invention.

First, the USB terminal device receives data transmitted from a source node on the Internet to a PC host system through the Internet access network (step 600). The data received in step 600 may be an Ethernet transmission frame, or may be an ADSL transmission frame or an ATM cell, depending on the type of Internet access network.

Next, the data received in step 600 is processed to extract an IP packet therefrom (step 610). If the private network IP network address is used in the USB host device and the PC host system connected by USB, the public network IP network address included in the packet header of the IP packet extracted in step 610 is converted into the private network IP network address. It is desirable to go through the process.

Next, the IP packet is configured in a USB transmission unit (step 620) and transmitted to the PC host system via USB (step 630). Of course, the data transmission and reception via the USB between the PC host system and the USB terminal device is possible after the initialization process has been completed as described above.

The PC host system receives data configured in a USB transmission unit from a USB terminal device through USB (step 640), and configures it directly into an IP packet (step 650). That is, by performing the SAR on the USB transmission unit received in step 640, the USB terminal device is composed of IP packets instead of MAC frames depending on the type of the Internet access network used to access the Internet, without going through the MAC layer. Pass directly to the IP layer.

Finally, the IP packet configured in step 650 is processed through the upper layer of the IP layer and finally delivered to the corresponding application program on the PC host system (660).

Embodiments of the present invention can be written as a program executable in a computer system. In addition, the program can be read from a computer readable recording medium having recorded such a program and executed in a general-purpose digital computer system. Such recording media include magnetic storage media (e.g., ROM, floppy disk, hard disk, etc.), optical reading media (e.g., CD-ROM, DVD, etc.) and carrier waves (e.g., transmission over the Internet). Media is included.

So far, the present invention has been described with reference to the preferred embodiment (s). Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

According to the present invention, it is possible to simplify the protocol structure in a PC host system for accessing the Internet via USB through a new protocol structure having an IP layer above the segment design layer in the PC host system and the USB terminal device. In other words, by removing the MAC layer from the protocol structure of the PC host system for accessing the Internet via USB, the USB terminal device can access the Internet through a single protocol structure regardless of the type of Internet access network used to access the Internet. It works.

Claims (15)

Claims [1] A method for processing transmission data for accessing the Internet from a PC host system via a USB connected USB terminal device, a universal serial bus providing an interface to a computer and a peripheral device. (a) configuring the transmission data to be transmitted to a destination node on the Internet by an IP packet in the PC host system; (b) constructing the IP packet configured in step (a) directly into a USB transmission unit; And (c) reconstructing the USB transmission unit configured in step (b) into an IP packet through the USB terminal device connected by USB and transmitting the IP packet to a destination node on the Internet. Method of processing transmission data in PC host system for connection. The method of claim 1, The IP packet configured in step (a) includes a private network IP network address in a packet header, In the step (c), the PC host system for the Internet access through the universal serial bus, characterized in that for reconfiguring the IP packet by converting the private network IP network address to a public network IP network address via the USB terminal device. Processing method of transmission data. A method of processing transmission data for accessing the Internet from a USB terminal device connected to a PC host system through a USB, a universal serial bus providing an interface to a computer and a peripheral device, (a) receiving, at the USB host device, transmission data to be transmitted from the PC host system to a destination node on the Internet via USB; (b) configuring the transmission data received in step (a) into an IP packet; (c) configuring the IP packet configured in step (b) into a transmission frame according to the type of Internet access network used to access the Internet from the USB terminal device; And (d) transmitting the transmission frame configured in step (c) to a destination node on the Internet through the Internet access network. Treatment method. The method of claim 3, wherein step (b) comprises: In the USB terminal device for accessing the Internet through a universal serial bus, characterized in that the IP packet is configured by converting the private network IP network address included in the transmission data received in step (a) to a public network IP network address Processing method of transmission data. The method of claim 3, wherein step (c) comprises: When the type of the Internet access network is Ethernet, the IP packet is configured as an Ethernet transmission frame, characterized in that the transmission data processing method in the USB terminal device for Internet access via a universal serial bus. The method of claim 3, wherein step (c) comprises: And when the type of the Internet access network is ADSL, which is an asynchronous digital subscriber line, the IP packet is configured as an ADSL transmission frame. A method for processing received data for accessing the Internet from a USB terminal device connected to a PC host system via a universal serial bus (USB) providing an interface to a computer and a peripheral device, (a) receiving data transmitted from a source node on the Internet to the PC host system in the USB terminal device through an internet access network used to access the Internet from the USB terminal device; (b) extracting an IP packet from the data received in step (a); (c) configuring the IP packet extracted in the step (b) to a USB transmission unit; And and (d) transmitting the USB transmission unit configured in the step (c) to the PC host system via USB. Way. The method of claim 7, wherein step (b), And converting the public network IP network address included in the packet header of the extracted IP packet into a private network IP network address. Treatment method. A method of processing received data for accessing the Internet from a PC host system via a USB terminal device connected by USB, a universal serial bus providing an interface to a computer and a peripheral device, (a) receiving data transmitted from a source node on the Internet in the PC host system through the USB terminal device connected with the USB; (b) constructing the received data in the form of USB transmission unit in step (a) directly into an IP packet; And (c) forwarding the IP packet configured in step (b) to a corresponding application program on the PC host system through an upper layer of the IP layer. Method of processing received data in the system. A method of processing transmission data for accessing the Internet in a PC host system and a USB terminal device interconnected by USB, a universal serial bus providing an interface to a computer and a peripheral device, (a) configuring the transmission data to be transmitted to a destination node on the Internet by an IP packet in the PC host system; (b) constructing the IP packet configured in step (a) in a direct USB transmission unit and transmitting the USB packet to the USB terminal device through USB; (c) receiving data from the PC host system via USB at the USB terminal device; (d) reconstructing the data received in step (c) into an IP packet; And (e) configuring the IP packet configured in step (d) into a transmission frame according to the type of the Internet access network used to access the Internet from the USB terminal device, and transmitting the same through the Internet access network. A method of processing transmission data for internet access through a universal serial bus. The method of claim 10, The IP packet configured in the step (a) includes a private network IP network address, In step (d), the Internet access through the universal serial bus is characterized by reconstructing the IP packet by converting the private network IP network address included in the data received in step (c) into a public network IP network address. Processing method of transmission data. A method of processing received data for accessing the Internet in a USB terminal device and a PC host system interconnected by a USB, a universal serial bus providing an interface to a computer and a peripheral device, (a) receiving data transmitted from a source node on the Internet to the PC host system in the USB terminal device through an internet access network used to access the Internet from the USB terminal device; (b) extracting an IP packet from the data received in step (a); (c) configuring the IP packet extracted in the step (b) in a USB transmission unit and transmitting it to the PC host system via USB; (d) receiving data from the USB terminal device via USB in the PC host system; And (e) configuring the data received in the form of USB transmission unit in step (d) directly into an IP packet, and delivering the data to a corresponding application program on the PC host system through an upper layer of the IP layer. A method of processing received data for internet access through a universal serial bus. The method of claim 12, wherein step (b) comprises: And converting the public network IP network address included in the packet header of the extracted IP packet into a private network IP network address. (a) a destination node on the Internet in the PC host system for processing transmission data for accessing the Internet from a USB terminal device connected to the PC host system via USB, a universal serial bus providing an interface to a computer and a peripheral device; Receiving transmission data to be transmitted to via a USB; (b) configuring the transmission data received in step (a) into an IP packet; (c) configuring the IP packet configured in step (b) into a transmission frame according to the type of Internet access network used to access the Internet from the USB terminal device; And (d) a computer-readable recording medium having recorded thereon a program for executing, by a computer, the step of transmitting the transmission frame configured in step (c) to a destination node on the Internet through the Internet access network. (a) the PC host system from a source node on the Internet to process received data for accessing the Internet from a USB terminal device connected to the PC host system via USB, a universal serial bus providing an interface to a computer and a peripheral device. Receiving data transmitted through the Internet access network used to access the Internet from the USB terminal device; (b) extracting an IP packet from the data received in step (a); (c) configuring the IP packet extracted in the step (b) to a USB transmission unit; And (d) a computer-readable recording medium having recorded thereon a program for causing a computer to execute the step of transferring the USB transfer unit configured in step (c) to the PC host system via USB.