KR19990076149A - How to implement AI.P. - Google Patents

Abstract

end. TECHNICAL FIELD The present invention relates to an IEEE 1394 ARP implementation method for interworking between an ATM network and a LAN.

I. DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention An ARP implementation method capable of reducing an ATM address search time in data communication between LANs in a network including at least a plurality of LANs and an ATM exchange built using an IEEE 1394 serial bus .

All. A solution to the problem of the invention is to store the unique address information of each node constituting local area networks (LANs) and the corresponding ATM address in tabular form, and store the unique address information of a specific node for data transmission / And transmits the ATM address corresponding to the transmitted unique address to the requestor in response thereto.

la. An important application of the invention is that it can be used in IEEE 1394 networks.

Description

How to implement AI.P.

The present invention relates to an ARP (Address Resolution Protocol) method for interworking between an ATM network and an IEEE 1394 network, and more particularly, to implement an ARP mapping a unique address and an ATM address for distinguishing nodes of an IEEE 1394 network ≪ / RTI >

Local area networks (LANs), in which a large number of independent computers can communicate data within a relatively limited area, are generally based on Ethernet. Nowadays, there are also studies to overcome the disadvantages of Ethernet based LAN environment. One of the results of this study is to construct LAN environment using IEEE1394 serial bus.

IEEE1394 is a next generation multimedia interface device that enables exchange of information between various multimedia devices by the specifications established by the IEEE. Unlike conventional interface devices which are only allowed to connect between a personal computer and its peripheral devices (mouse, printer, scanner, etc.) It is a serial bus standard that can transmit and receive voice and image data between next generation multimedia devices. IEEE 1394 is a serial bus standard and consists of a simple protocol for data transmission. Therefore, IEEE1394 only provides data transmission means, and various network functions must exist in the upper layer of IEEE1394 in order to use as media to connect the network. The advantage of constructing a LAN environment using an IEEE1394 serial bus is that a LAN can be constructed at a lower price than Ethernet, a high-speed transmission of 400 Mbps is possible, maintenance is easy, multimedia such as moving pictures / And data can be transmitted / received in real time. However, when a LAN is constructed using the IEEE 1394 serial bus, a separate ARP (Address Resolution Protocol) is required for interworking with an ATM network based on a connection type service. This is because the ARP function used in the Ethernet base can not be used in the LAN constructed using the IEEE1394 serial bus.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method and apparatus for mapping a unique address and an ATM address that distinguish each node constituting a LAN, in a network including at least a plurality of LANs and an ATM exchange built using an IEEE 1394 serial bus To provide an ARP implementation method.

It is still another object of the present invention to provide an ARP implementation method capable of reducing a search time of an ATM address in data communication between LANs in a network including at least a plurality of LANs and an ATM exchange built using an IEEE 1394 serial bus. .

According to an aspect of the present invention, there is provided an ARP method for a network including at least a plurality of local area networks (LANs) and an asynchronous transfer mode (ATM) exchanger built using an IEEE 1394 serial bus. As a result,

And stores the unique address information of each node constituting the local area networks (LANs) and the corresponding ATM address in a tabular form and stores the table. When there is a unique address transfer of a specific node for data transmission / reception from an arbitrary requestor, And transmits the ATM address corresponding to the unique address to the requester.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating an example of connection of LANs built on the basis of an IEEE 1394 serial bus according to an embodiment of the present invention and an ATM network for connecting the LANs with each other.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

3 is a flowchart illustrating the operation of the ARP server 40 according to the embodiment of the present invention.

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

1 is a diagram illustrating connection examples of LANs constructed based on an IEEE 1394 serial bus and an ATM network for connecting the LANs according to an embodiment of the present invention. As shown in FIG. 1, the network configuration according to an embodiment of the present invention includes LANs 20 and 30 constructed using an IEEE 1394 serial bus, an ATM switch 10 for connecting the LANs 20 and 30 with each other, And an ARP server 40 for mapping. In each of the LANs 20 and 30, SOHO-NT terminals 22 and 32 exist for connecting the LAN to the ATM switch 10. The SOH network terminals 22 and 32 enable interworking between the LAN, which is an internal network, and the ATM switch 10, which is an external network. Therefore, the SOH network terminals 22 and 32 must have an ATM signaling function for connection with other SOHO terminals and an ARP cache table for supporting the function of the ARP server 40. [ The structure of the ARP cache table is shown in Table 1 below.

Unique address ATM address Timeout ... ... ...

On the other hand, the ARP server 40 has a table (hereinafter referred to as an ARP table) for mapping an unique address of each node connected to the IEEE 1394 serial bus to an ATM address, and deletes or additional information And stores it in the table. That is, the ARP server 40 has information (unique address and ATM address) of nodes belonging to all LANs managed by the ARP server 40. The structure of the ARP table is shown in Table 2 below.

Unique address ATM address ... ...

FIG. 2 is a flowchart illustrating an operation of the SOHO terminal 32 for explaining operations until two nodes are connected according to an embodiment of the present invention. FIG. 3 is a flowchart illustrating an operation of the ARP server 40 according to an embodiment of the present invention Fig.

Hereinafter, a networking operation between two nodes according to an embodiment of the present invention will be described in detail with reference to FIG. 1 to FIG.

In the embodiment of the present invention, the networking operation between the two nodes will be described assuming that the PC 1 constituting any LAN 30 among the plurality of LANs 20 and 30 connected to the ATM switch 10 is a requester. If the supplicant PC1 requests data communication with the PC2 of the other remote LAN 20, the so-called network terminal 32 constituting the LAN 30 detects this in step 40 of FIG. 2 and proceeds to step 42 in response thereto. In step 42, the SOHO terminal 32 checks whether the unique address of the PC 2 requested in step 40 exists in its own ARP cache table. If the unique address of the requested PC 2 is found in the ARP cache table of the requested PC 2, the SOHO terminal 32 proceeds to step 44, reads the ATM address corresponding to the unique address present in the ARP cache table, 10 to request connection with PC2. If the unique address of the requested PC 2 is not present in its own ARP cache table as a result of the checking in step 42, the SOH network terminal 32 proceeds to step 46 and transmits the unique address of the PC 2 to the ARP server 40, And requests an ATM address corresponding to the address.

3, the ARP server 40 proceeds to step 62 in the case where there is an address request from an arbitrary SOHO terminal in step 60. In step 62, the ARP server 40 transmits an ARP table . If there is a unique address of the PC 2 requested as a result of the search, the ARP server 40 proceeds to step 66 and searches for an ATM address corresponding to the unique address of the PC 2 and transmits the address to the SOHO terminal. If the unique address of the PC 2 requested as a result of the search in step 64 is not present in the ARP table, the ARP server 40 proceeds to step 68 and transmits an error message to the sub- Through the above processes, the ARP server 40, which has requested the ATM address, transmits the requested ATM address or transmits an error message to the requested SOHO terminal.

2, the operation of the SOHO terminal 32 which has received the ATM address or the error message from the ARP server 40 will be described. In step 46, the SOHO terminal 32 requesting the ATM address is executed in step 48 And checks whether the ATM address is transmitted from the ARP server 40. If it is determined that the ATM address has been transmitted, the SOHO terminal 32 proceeds to step 50 and maps the unique address and the ATM address of the PC 2 to the ARP cache table as shown in Table 1 and stores it. At this time, the ATM address stored in the ARP cache table is stored for a predetermined time until the timeout is completed. Accordingly, the SOHO terminal 32 can provide the desired ATM address to the ARP server 40 only by searching the ARP cache table of the ARP server 40 without requesting the ARP server 40 with the same request thereafter. Meanwhile, the SOHO terminal 32 storing the ATM address signals the received ATM address to request a connection with the PC 2, and then proceeds to step 52. [ If the error message is received from the ARP server 40 in step 48, the SOHO terminal 32 proceeds to step 54 and transmits the error message transmitted from the ARP server 40 to the requestor PC 1. [ Then, the process proceeds to step 40 to continuously check whether there is an address request for data communication.

Accordingly, in step 52, the two nodes PC1 and PC2 perform normal data transmission by the networking operation as described above.

As described above, according to the present invention, a LAN is constructed on the basis of an IEEE 1394 serial bus, and a unique address and an ATM address are mapped between each node so that networking operations between LANs are performed through an ATM exchange, It is advantageous to construct an IEEE1394 network overcoming the disadvantages. In addition, in a network including at least a plurality of LANs and an ATM exchange built using the IEEE 1394 serial bus, it is possible to shorten the search time of the ATM address in the data communication between the LANs, so that there is an advantage that data can be transferred quickly.

Claims (3)

An ARP implementation method of a network including at least a plurality of local area networks (LANs) and asynchronous transfer mode (ATM) exchangers constructed using an IEEE 1394 serial bus, And stores the unique address information of each node constituting the local area networks (LANs) and the corresponding ATM address in a tabular form and stores the table. When there is a unique address transfer of a specific node for data transmission / reception from an arbitrary requestor, And sending an ATM address corresponding to the unique address to the requester. 2. The method of claim 1, wherein the ATM address transmitted to the requester is stored and used until the timeout is completed. 2. The method of claim 1, wherein if the unique address sent from the requester is not present in the table, the method sends an error message to the requester.