KR20020007477A - Apparatus for being shared ip address by port number - Google Patents

Abstract

PURPOSE: An apparatus for sharing an IP address is provided to prevent the waste of the IP address and improve the speed by using port number included in a TCP/UDP/IP header. CONSTITUTION: The first physical class module(2) is connected with the Internet(8). In addition, the first physical class(2) performs a conversion between a transmission media signal and Ethernet data. The second physical class module(3) is connected with a communication module of a PC(9). In addition, the second physical module(3) performs a conversion between a physical class signal and the Ethernet data. The third physical class module(4) is connected with hardware for a specific application. In addition, the third physical class module(4) performs a conversion between the physical class signal and the Ethernet data. A transmission module(5) transmits the data inputted from the second and the third physical class module(3,4) according to the order of priority of port number. A port number storing device(7) stores a port number of the hardware for the specific application connected with the third physical class module(4). A receiving module(6) judges an object port and transmits the object port to the communication module of the PC(9) or the hardware for the specific application through the second of the third physical class module(3,4).

Description

IP address sharing device using port number {APPARATUS FOR BEING SHARED IP ADDRESS BY PORT NUMBER}

According to the present invention, an IP using a port number for IP-hosting a specific application hardware device (for example, an Internet phone) using the same IP as a PC using a port number indicating an application protocol for data transmitted and received over the Internet. (IP) address sharing device.

All host computers currently connected to the Internet use a unique IP address assigned by an authorized authority to distinguish each host computer from the Internet.

The IP address is displayed in a size of 4 bytes (32 bits total) in 1 byte (8 bit) units, and is divided into a network identifier and a host identifier. The network identifier is used to specify the IP address range of a specific network inside the Internet, described below.

The Internet is a collection of multiple networks. Each network is assigned an IP address range of a certain size according to its size. The IP address range is classified into IP classes, and a total of five classes from Class A to Class E are used. IP class is divided and used. Classes A, B, and C are used to indicate the range of IP addresses used in each network inside the Internet except class D for dual multicasting and class E not used. Class A uses one byte at the top as the network identifier, class B uses two bytes from the top, and class C uses three bytes from the top as the network identifier.

However, there is a limit to the number of host computers that can be allocated to IP addresses with a size of 32 bytes. Recently, due to the rapid spread of the Internet, the increase of the number of host computers has caused serious problems of depletion of limited IP addresses. It is true.

In order to overcome the problem of depletion of the IP address, by using a few bits of the host identifier portion of the IP address as a subnet identifier, the IP address is saved by dividing the network allocated to a single network identifier into multiple IP subnets. Subnetting technique, CIDR (Classless Interdomain Routing) method that separates IP address range of network by arbitrary number of bits, eliminating the distinction between network identifier and host identifier part in existing A, B, C class, and segmentation The VLSM (Veriable Length Subnet Mask) method is used to specify IP address ranges of different sizes. In addition, private networks built by companies or organizations use internally defined private IP addresses, and send / receive data to the external Internet by using a publicly available IP address mapping method. In order to save the necessary IP address, such methods include network address translation (NAT) or proxy server.

However, the methods for saving the IP address described above are for efficiently allocating IP addresses to PCs connected to the Internet through independent communication lines, and between devices connected to the same communication line to perform different applications. There is no research on how to share an IP address.

In addition, in the case of an application that is greatly affected by data transmission delay, such as an Internet phone, if a separate Internet phone device is used as a peripheral device of the PC, data must be transmitted and received through the PC. The call quality may be deteriorated. However, if a separate IP address is given to the Internet telephony device in order to obtain a desired transmission speed and connected to the Internet through an independent communication line, the cost is not only in terms of utilization of the insufficient IP address but also in cost. In terms of efficiency, there is a problem.

The present invention has been proposed to solve the above-mentioned conventional problems, and an object thereof is the same between devices (PC, application hardware, etc.) connected to the same communication line using a port number included in a TCP / UDP / IP header. The present invention relates to an IP (IP) address sharing device using a port number that can achieve an effect of speed improvement by sharing an IP address and preventing waste of the IP address.

Figure 1 is a block diagram showing the overall configuration of the IP address sharing apparatus according to the present invention.

2 is a block diagram showing a detailed configuration of a receiving module in the IP address sharing device shown in FIG.

3 is a block diagram showing a detailed configuration of a transmission module in the IP address sharing device shown in FIG.

* Description of the symbols for the main parts of the drawings *

1: IP address sharing device 2 ~ 4: 1 ~ 3 physical layer module

5: sending module 6: receiving module

7: Port number saver 8: Internet

9: PC (Personal Computer) 10: Internet Phone

As a construction means for achieving the object of the present invention described above, the present invention is an IP (IP) address sharing device using a port number for IP-hosting a hardware device for a specific application connected to the same communication line as a PC connected to the Internet To

A first physical layer module connected to the Internet and performing conversion between signals of a transmission medium and Ethernet data;

A second physical layer module connected to a communication module of a PC and performing conversion between signals of the physical layer and Ethernet data;

A third physical layer module connected to the hardware device for a specific application and performing conversion between a physical layer signal and Ethernet data;

A transmission module for giving priority to data input from the third physical layer module and transmitting transmission data input through the second physical layer module and the third physical layer module to the Internet through the first physical layer module;

A port number store for storing port numbers of specific application devices connected to the third physical layer module;

The destination port number is determined by comparing the destination port number of the Internet data received through the first physical layer module with the port number stored in the port number storage, and the PC or the specific device is determined through the second physical layer module or the third physical layer module. Receiving module for sending to the application hardware device; characterized in that consisting of.

And, the receiving module

A first buffer for storing received data input through the first physical layer module until determining a destination;

A second buffer for synchronizing the reception data and transmitting the received data to the second physical layer module;

A third buffer for synchronizing the received data and transmitting the received data to the third physical layer module;

A comparison circuit for comparing a destination port number of the reception data inputted to the first buffer with a port number stored in the port number storage unit;

A demultiplexer (DEMUX) outputting received data having a corresponding port number as a third buffer according to a comparison result of the comparison circuit, and receiving data having a corresponding port number as a second buffer;

Characterized in that consists of.

And, the transmission module

A fourth buffer for storing transmission data input through the second physical layer module;

A fifth buffer for storing transmission data input through the third physical layer module;

A sixth buffer for transmitting the transmission data in synchronization with the first physical layer module;

A multiplexer (MUX) for selecting one of the data of the fourth buffer and the fifth buffer and transferring the selected data to the sixth buffer;

And a priority determining module controlling the selection operation of the multiplexer so that the data of the fifth buffer is transmitted first.

In addition, an IP address sharing apparatus using a port number according to the present invention includes two or more third physical layer modules connected to different application hardware devices, respectively, and each port number unique to the application hardware device. And assign priority to a predetermined order to transmit and receive data according to the priority order of the assigned port number.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the IP address sharing apparatus according to the present invention.

In general, data communication through the Internet uses the TCP / IP protocol. In the header of the control information among the contents of the packet used for data transmission and reception in the TCP / IP protocol, a port number for identifying an application protocol is used. number) is included.

The port number can be used to distinguish 2 ¹⁶ applications using 16 bits, and a value between 1 and 255 is assigned to a specific application, for example, HTTP, FTP, TELNET, SMTP, etc., and is between 256 and 1024. The value of is reserved for use by standard Unix services, and values above 1024 are available for general user applications. The present invention applies to any of the hardware devices for the application to use any value of the port number available for the user application, in the present embodiment is assigned to the Internet telephony device, in the header of the data packet for Internet telephony The port number allocated as described above is transmitted along with the data. The IP address sharing apparatus according to the present invention stores the port number assigned to the hardware device for the application to be IP-hosted, and checks the port number included in the transmitted / received packet to be the same data as the stored port number. In this case, send and receive in preference to other data.

1 is an overall configuration diagram of an IP address sharing apparatus using a port number according to the present invention. As shown, the IP address sharing apparatus 1 is the Internet 8, the PC 9, and the Internet telephone 10, respectively. A first to third physical layer modules (2 to 4), the second physical layer module (3), and a third physical layer connected to the first to third physical layer modules (2 to 4) for transferring physical layer signals to Ethernet data or for converting Ethernet data to physical layer signals. A transmission module 5 for transmitting data to be transmitted from the hierarchy module 4 to the Internet 8 through the first physical hierarchy module 2 according to a priority, and the first physical hierarchy module 2; Receiving Ethernet data input through the port number to determine whether the destination is a PC (9) or Internet phone 10 according to the port number and the transmission module (6) for transmitting data to the destination, and a port number for storing the port number It consists of a reservoir (7).

In the above, data is transmitted and received between the first, second, and third physical layer modules 2 to 4 and the transceiving modules 5 and 6 by using a media independent interface (MII).

In the above embodiment, a PC 9 and an Internet phone 10 are representative examples of devices that share an IP address, and the Internet phone 10 may be embodied as a built-in PC. It may be implemented externally outside the PC. In addition, any application device that requires communication via the Internet may be connected to the IP address sharing device 10.

2 is a block diagram showing an internal configuration of a receiving module 6 constituting the IP address sharing device. As shown in the drawing, the receiving module 6 stores data inputted from the first physical layer module 2. Comparison between comparing the first buffer 61 to be stored until the transmission destination is determined with the port number of the data received by the first buffer 61 and the port number stored in the port number storage 7 to match. A demultiplexer 63 for selectively outputting data stored in the first buffer 61 to the second buffer 64 or the third buffer 65 according to the comparison result of the circuit 62 and the comparison circuit 62; And are respectively connected to the second physical layer module 3 and the third physical layer module 4 to temporarily store received data input from the demultiplexer 63 in synchronization with the physical layer modules 3 and 4. It consists of the second and third buffers 64 and 65.

FIG. 3 is a block diagram showing the internal structure of a transmission module in the IP address sharing device shown in FIG. 1, wherein the PC 9 and the Internet, respectively, which are entered through the second and third physical layer modules 3 and 4, respectively. A fourth and fifth buffers 51 and 52 for synchronizing, receiving and storing data of the telephone 10, and a priority determining module 53 for determining which of the data of the PC and the data of the Internet telephone to be transmitted first; The multiplexer 54 sequentially outputs the data stored in the fourth buffer 51 and the fifth buffer 52 according to the determination of the priority determining module 53, and the PC selected from the multiplexer 54. And a sixth buffer 55 for sending data or data of an Internet telephone in synchronization with the first physical layer module 2.

The IP address sharing apparatus using the port number according to the present invention configured as described above is basically connected to the communication port of the PC (9), and also a hardware device for an application using the same IP address as the PC, that is, the Internet telephone (10). Is connected through a separate port, and connects the PC 9 and the Internet telephone 10 to the Internet 8.

In addition, a port number arbitrarily assigned by the Internet telephone service provider for the Internet telephone 10 among the numbers of the port number area for the user application is stored in the port number storage 7.

In the above state, a process of transmitting and receiving data will be described. First, the data reception will be described.

When predetermined data is received from the Internet 8, the received signal is converted into Ethernet data through the first physical layer module 2 and transmitted to the receiving module 6.

The receiving module 6 is configured as shown in FIG. 2, and stores the received packet from the first physical layer module 2 in the first buffer 61 and then through the comparison circuit 62. The destination port number recorded in the header of the reception packet is compared with the port number stored in the port number storage 7. At this time, if the destination port number of the received packet matches the port number stored in the port number storage 7, the reception data is the data for the Internet telephone, so that the demultiplexer 63 receives the received packet in the third buffer 63. The third buffer 63 transmits the received packet to the third physical layer module 4 through the demultiplexer 63 so that the data for the Internet phone received from the internet 8 is transferred to the third physical layer module (3). 4) is converted into a physical layer signal and sent to the Internet telephone 10.

On the contrary, when the comparison port 62 compares the destination port number of the received packet with the port number stored in the port number store 7, the demultiplexer 63 receives the first buffer 61. The packet is transferred to the second buffer 62, and the data of the second buffer 62 is converted into a physical layer signal through the second physical layer module 3, and then sent to the PC 9 to be sent to the PC 9. Is handled by the application in question.

The operation at the time of data transmission is performed as follows.

The transmission data sent from the PC 9 and / or the Internet telephone 10 is input to the transmission module 5 through the second physical layer module 3 and the third physical layer module 4, respectively.

The transmission module 5 is configured as shown in FIG. 3, and transmits the Ethernet data input from the second physical layer module 3 and the third physical layer module 4, that is, the transmission packet to the fourth buffer. 51 and the fifth buffer 52.

In the above, when only the data of the PC is input, the multiplexer 54 connects the output of the fourth buffer 51 to the input of the sixth buffer 55 so that the PC data is transmitted through the first physical layer module 2. In order to transmit data to the Internet, and only the data of the Internet telephone is input, the multiplexer 54 connects the output of the fifth buffer 52 to the sixth buffer 55, so that the data of the Internet telephone is stored in the first physical layer module. (2) to be sent to the destination of the Internet (8).

When the data of the PC and the data of the Internet telephone are input at the same time, the multiplexer 54 first outputs the data of the fifth buffer 52 to the sixth buffer 55 by the priority determining module 53. The data of the telephone is first transmitted through the first physical layer module 2. After the transmission data of the Internet telephone is transmitted as described above, the transmission data of the PC in the fourth buffer 51 is output to the sixth buffer 55 so as to be transmitted to the Internet through the first physical layer module 2. .

In this way, the transmission module 5 transmits the data of the Internet phone, which is greatly affected by the data transmission delay, prior to the data of other applications of the PC 9, thereby reducing the transmission delay of the Internet phone data. .

As described above, the IP address sharing apparatus using the port number according to the present invention is to share the IP address with the PC for the hardware device for applications connected to the Internet IP host for a specific application hardware device without having to be given a separate IP address Therefore, there is an excellent effect to increase the utilization of the insufficient IP address. In addition, priority can be given to the data sent from the device to the Internet, which can reduce the transmission delay for applications that are greatly affected by the transmission delay, such as video or audio data, or require real-time data transmission. You can get it.

Claims (5)

In the IP address sharing device using a port number for IP-hosting a hardware device for a specific application connected to the Internet, A first physical layer module connected to the Internet and performing conversion between a transmission medium signal and Ethernet data; A second physical layer module connected to a communication module of a PC and performing conversion between a physical layer signal and Ethernet data; A third physical layer module connected to the hardware device for a specific application and performing conversion between a physical layer signal and Ethernet data; A transmission module which gives priority to transmission data input from the second physical layer module and the third physical layer module according to a port number, and transmits the data to the Internet through the first physical layer module in order; A port number store for storing a port number of a hardware device for a specific application connected to the third physical layer module; The destination port number of the Internet data received through the first physical layer module is compared with the port number stored in the port number storage unit to determine the destination port, and the communication module of the PC through the second physical layer module or the third physical layer module. Or a receiving module for transmitting to a hardware device for a specific application. The method of claim 1, wherein the receiving module A first buffer for storing received data inputted through the first physical layer module until determining a destination; A second buffer for transmitting the received data in synchronization with the second physical layer module; A third buffer for synchronizing and transmitting the received data to the third physical layer module; A comparison circuit for comparing a destination port number of the reception data inputted to the first buffer with a port number stored in the port number storage unit; A demultiplexer for outputting received data whose port numbers match the third buffer according to a comparison result of the comparison circuit, and outputting received data that does not match the port number to the second buffer; IP (IP) address sharing device using a port number, characterized in that consisting of. The method of claim 1, wherein the transmitting module A fourth buffer for storing transmission data input through the second physical layer module; A fifth buffer for storing transmission data input through the third physical layer module; A sixth buffer for transmitting the transmission data in synchronization with the first physical layer module; A multiplexer for selecting one of the fourth buffer and the fifth buffer and transferring the selected data to the sixth buffer; A priority determining module controlling a selection operation of the multiplexer so that data of the fifth buffer is transmitted first; IP (IP) address sharing device using a port number, characterized in that consisting of. The method according to any one of claims 1 to 3, The IP address sharing apparatus using the port number includes two or more third physical layer modules connected to hardware devices for different applications, respectively, and assigns port numbers of the hardware devices for the applications, and priorities in a predetermined order. And IP address sharing apparatus using a port number, characterized in that to transmit and receive data in the order given by the check of the port number. The method according to any one of claims 1 to 3, The specific application hardware device connected to the third physical layer module IP (IP) address sharing device using a port number, characterized in that the function of the Internet phone.