KR20010099495A - A system and method to use network address as the physical address of network interface card - Google Patents

Abstract

Devices on the network have a network address and a physical address and use the other party's physical address to transmit the actual frame. The ARP (Address Resolution Protocol) is operated to find out the other party's physical address from the other party's network address. As a result, communication time is long and bandwidth is wasted due to the ALP frame. According to the present invention, all communication devices on the network use all or a host identifier part of their network address as the physical address of their network matching device to shorten the communication time and eliminate waste of network bandwidth due to the ALP frame. It is about how it can be.

Description

System and method to use network address as physical address of network matching card {a system and method to use network address as the physical address of network interface card}

The present invention calculates the physical address so that it is not necessary to find the physical address of the other party in the network address of the other party in order to shorten the communication time in the network and eliminate the waste of bandwidth by the ARP protocol. It's all about the way and the systems that are on the card.

1 illustrates the most typical reference model of a network. The model includes four layers: the datalink and physical layers, the network layer, the transport layer, and the application layer. The data link and physical layer perform frame transfer between communication devices within the network. The frame address, which is the physical address of the calling communication device, is used to transmit the frame. Examples of datalinks and physical layers include Ethernet, wireless LAN, home network, and personal area network. In general, the data link and the physical layer are implemented as network matching cards. The network layer identifies the outgoing communication device by the network address, and establishes an optimal communication path between the outgoing communication devices and delivers packets. The protocol used as the network layer on the Internet is called the Internet Protocol (IP). The transport layer serves to support communication between the outgoing communication devices. The application layer includes high level protocols such as telnet, file transfer protocol (FTP) and hypertext transfer protocol (HTTP).

Three methods are used to identify the destination communication device on the network: name, network address, and physical address. Network users identify destinations by names that are memorable and convenient to handle, but networks cannot handle these names and can only identify destinations by network address. The addresses of communication devices are generally separated into logical network addresses and physical addresses so that the network addresses of communication devices are not dependent on the physical environment. In other words, a dual address system is used to maintain the network address even if the physical address changes due to a change in location or hardware change. The network address on the Internet is called the Internet address.

When an originating communication device wants to communicate with a destination communication device with a specific name, it must first translate the name of the destination communication device into a logical network address understood by the network, that is, interpret the name. On the Internet, the name of a destination is called a domain name. The Domain Name System (DNS) service is used to resolve Internet addresses from domain names. The network address consists of a network identifier representing the network to which the device belongs and a host identifier representing a host in the network. The network forwards the packet to the destination network using the network identifier of the destination network address of the packet input from the source communication device. The destination network finds the physical address of the destination host from the destination network address of the forwarded packet or from the host identifier of the destination network address. In this case, if the network address or the host identifier's physical address is registered in the cache, it is the physical address. It reads and uses it, but if it doesn't exist, it starts ARP protocol to get the physical address.

Figure 2 shows the operation of this ALP protocol on the Internet. If the router does not have information about the physical address of the destination host's Internet address 210.115.10.2, then ARP is activated. First, the router broadcasts an ARP Request frame containing 210.115.10.2, the Internet address of the destination host. Then, the destination host receives this broadcast frame and returns an ARP Reply frame containing its own physical address, 0800207B9915, because it means a physical address request for its Internet address. The router then receives the return frame, which knows the physical address of 210.115.10.2 and stores it in the cache. Network matching card of the destination host can be replaced at any time, so the physical address stored in the cache is deleted after a short time to get a new physical address. In this example, only the physical address resolution in the destination network is described, but in the communication between the router and the router, a physical address translation procedure takes place to obtain the physical address of the other router from the network address of the other router.

The first problem of the current physical address translation system is communication delay caused by ALP protocol. In order to transmit one packet, the communication delay is increased by the sum of the ARP request frame transmission, the ALP reply frame reception, and the ALP frame processing time. The same physical address translation procedure takes place between the calling communication device and the calling router, between the called router and the destination host as the called communication device, and between adjacent routers in the path between the calling router and the called router. Since the address translation procedure occurs sequentially according to the order in which packets are delivered, the entire address translation time is reflected in the delay of communication time. Therefore, the physical address translation time delay can occupy a large part of the total communication delay time. The second problem is a waste of bandwidth because two frames, ie, an ARP Request and an ARP Reply frame, must be transmitted in order to send one packet. Of course, using the cache can reduce the waste of bandwidth, but fundamentally does not eliminate the waste of bandwidth by ALP traffic. Due to such communication delay time and loss of bandwidth, network quality of service may be degraded.

The present invention is proposed to solve the above problems of the prior art as a network address assigned to a communication device by calculating the only physical address in the network to which the device belongs to use the communication delay time by using the physical address of the network matching card To reduce the waste of network bandwidth. Each communication device sets its own network address, calculates the physical address from the network address, and stores it on the network matching card.

1 is a reference model diagram of a network to which the present invention is applied

2 is a conventional physical address translation procedure diagram

3 is an overall system configuration according to a preferred embodiment of the present invention

4 is a configuration diagram of a network matching card in a preferred embodiment of the present invention.

5 is a diagram illustrating a physical address translation procedure according to an embodiment of the present invention.

6 is a diagram illustrating a physical address calculation and recording procedure according to an embodiment of the present invention.

3 shows an overall configuration diagram according to a preferred embodiment of the present invention. In order to achieve the above object, a method provided by the present invention includes a communication protocol (1) for exchanging packets with a counterpart by a network address; Network matching (2) for exchanging frames with a counterpart by a physical address; An address calculation (3) for calculating a physical address required for network matching from the network address and recording the same in a network matching card; And a network 4 for transporting the frame. The network address required for the communication protocol (1) is set in two ways. One is to set a fixed address directly, and the other is to get the address automatically from an address supply server. Network matching (3) is generally implemented with network matching cards such as Ethernet, wireless LAN, home network and personal area network matching cards, and communication protocols include TCP / IP, NetBEUI, etc. It is configured as software. There are various kinds of networks 4, and examples thereof include Ethernet, wireless LAN, home network, and personal area network.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

4 shows a method of setting a physical address in the network matching card 5 in the preferred embodiment of the present invention. The unique physical address is set to a specific value when the network matching card is manufactured. In the case of Ethernet, the unique physical address has a 6-byte value. When a computer with a network matching card is powered up or a hardware reset is performed, the unique physical address is automatically stored in the physical address in hardware. In the case of the existing network matching card, only the automatic physical address setting function is provided by the unique physical address. In the present invention, the physical address is calculated from the network address and stored in the physical address. Therefore, a circuit that stores the physical address in software is added to the network matching card so that the physical address determined from the network address can be stored.

FIG. 5 shows that a physical address is set from a network address when the present invention is applied to FIG. 2, which shows a process of setting a physical address by an ALP protocol, which is a conventional scheme. The router 6 generally uses a fixed internet address. Since two network matching cards are installed, one outside and one inside, two internet addresses are used. When a router establishes a static Internet address at startup, it calculates the physical address from the Internet address and stores it on a network matching card. In the method of determining the physical address from the network address, only the host identifier is basically used, but when there is enough space for the physical address, all the network addresses are used to determine the physical address. If the physical address space is larger, each bit of the remaining area is filled with a value of 1. In FIG. 5, since the Internet address is 4 bytes and the Ethernet address is 6 bytes, the upper two bytes are filled with FF, and the remaining 4 bytes are used as the Internet address value. In FIG. 5, an internet address is expressed in decimal, and a physical address is expressed in hexa-decimal. In the case of the destination host 7, the Internet address can be obtained from a fixed Internet address or an address supply server. When the Internet address is determined, the physical address is calculated in the same manner and the new physical address is newly added to the Ethernet card. List the address.

6 shows a procedure for calculating and storing a physical address in a preferred embodiment of the present invention. Investigating the network addressing method (8), when the network address is automatically assigned, the network address is supplied from the address supply server by the DHCP procedure (9). In this case, use the existing DHCP procedure using its own physical address. Set the supplied network address to its own network address (10). In case of using a fixed network address, the network address input from the user is set as its network address (11). After the network address is set in this way, it calculates its physical address using its network address and stores it on the network registration card (12).

When the address space of the first physical address is larger than the address space of the network address, the physical address is filled with the network address from the low byte, and all bit values of the remaining high byte are set to '1'. Second, if the address space of the physical address is smaller than the address space of the network address, the host identifier of the network address is filled from the low byte to the physical address, and all bit values of the remaining high byte are set to the value of 1.

The network matching card has its own unique physical address, but the software can store a new physical address, and the newly recorded physical address is erased at the time of hardware reset and the original unique physical address is stored instead. Ensure compatibility with the network environment using the protocol.

First, it can completely eliminate communication delay caused by ALP protocol in each network between originating and receiving communication devices. Second, it is possible to completely eliminate bandwidth waste due to frames accompanying ALP protocol. A great effect is expected to improve service quality.

In addition, the above description of the present invention has been presented for purposes of illustration and description only. The invention is not limited to the form shown, and many variations and modifications are possible in light of the principles of the invention described above. The described embodiments are selected to best describe the principles and substantive provisions of the present invention in order that those skilled in the art may use the invention in various embodiments and as appropriate to the specific application desired. It is intended that the scope of the invention only be limited by the appended claims below.

Claims (1)

Calculating a physical address using a network address and recording the same on a network matching card (3, 12); (4) A method of storing a unique physical address in hardware and a physical address in software when necessary in hardware reset or power supply in a network matching card. (4)