KR20010063094A - An integrated destination name and address resolution method and system for shortcut path of next generation internet - Google Patents

Abstract

PURPOSE: An integrated ATM(Asynchronous Transfer Mode) name system capable of setting up a shortcut path in the next-generation Internet are provided to classify traffic between an originating/destination host and a router into IP(Internet Protocol) traffic, IPoA(IP over ATM) traffic and pure ATM traffic, so as to provide a shortcut path according to a destination address. CONSTITUTION: An integrated destination name resolution function block(200) has a name resolution function block(220) and an address resolution function block(230). The name resolution function block(220) processes an IP(Internet Protocol) and ATM(Asynchronous Transfer Mode) domain name inputted from a user application block(210). And the address resolution function block(230) processes address resolution for an address obtained by the name resolution function block(220). The integrated destination name resolution function block(200) provides services of IP, IPoA(IP over ATM) and pure ATM, and the traffic inputted by the user is delivered to an ATM/IP domain name input block(221) of the name resolution function block(220).

Description

An integrated destination name and address resolution method and system for shortcut path of next generation internet}

The present invention relates to an integrated name address analysis method capable of providing a shortcut path in a next generation Internet (ATM-based IP network), and in detail, the existing IP-based DNS (Domain Name System; IETF, RFC1035 / 1034) and ATM-based ANS. In the system that provides only IP interface by utilizing (ATM Name System; ATM-Forum, ANS 2.0) function, the ATM interface that can set the hop-by-hop routing path by the access router with the corresponding IP address and MAC address, and set the shortcut path The present invention relates to a method and an apparatus for establishing an ATM connection with an ATM address to a destination system capable of short-path routing.

Until now, each name function has been independently performed depending on each interface or network infrastructure.In the case of a system with dual interfaces, it cannot be selectively used depending on the characteristics or interfaces of each application traffic. To transmit traffic.

In addition, the current IP-based IP services are provided using most of the CLIP (Classical IPoA) and LANE (LAN Emulation), providing only the ATM at the bottom, and provides Internet services by mounting the IP on the ATM layer. . In other words, despite the environment in which shortcut paths can be established, data transmission and reception are performed using conventional hop-by-hop routing.

Therefore, there is a need for a method of automatically setting a shortcut path function required by a user by adding an integrated name address resolution function to a dual interface host and a router having IP and ATM interfaces. By applying this integrated name address resolution function, it is possible to use network resources efficiently regardless of the actual network infrastructure, and it can save time and money, and also make reliable data transmission and reception by using ATM network that can guarantee QoS. do.

However, in order to provide such a function in one server, a system providing IP and ATM interfaces must be able to provide and process both DNS and ANS, and hop-by-hop or shortcuts according to interface and service characteristics according to characteristics of application traffic. Routing must be possible. Consider a shortcut path that provides an ATM address for a domain name through an integrated name address resolution procedure to a destination host or router that provides an ATM interface and provides direct ATM access to that ATM address.

An object of the present invention devised by the above-described demand is to provide traffic between originating and destination hosts and routers in next generation Internet network, according to interface and traffic characteristics, IP traffic, IPoA (IPoA) traffic and pure The present invention provides an integrated destination name addressing method and apparatus (hereinafter referred to as IANS; Integrated ATM Name System) for classifying ATM traffic and providing shortcut paths according to destination addresses.

1 is a block diagram of a next generation Internet network providing a method for resolving integrated destination name addresses

2 is a detailed functional structure diagram of a host system to which the present invention is applied

3 is a detailed structural diagram of an integrated address resolution function of a router system to which the present invention is applied;

4 is a flowchart showing a method for resolving a unified destination name address according to the present invention.

In order to achieve the above object, the present invention considers a next-generation Internet network to which an integrated destination name address resolution function is applicable. Here, the next generation Internet network assumes an integrated network of existing IP-based Internet network, ATM-based IPoA network, and ATM-based pure ATM network. As a host of the next generation Internet network, a pure IP terminal providing only an Ethernet interface and an ATM interface but an IPoA terminal providing an IP service and an ATM terminal providing only a pure ATM service are assumed.

The present invention integrates DNS (Domain Name System) of IP service and ANS (ATM Name System) of pure ATM service to transfer ATM traffic and Internet traffic by short path in next-generation Internet converged network to input IP and ATM domain name. Receive the corresponding IP and ATM address, and based on this address to the corresponding destination router or host, depending on the device providing interface and traffic characteristics, the shortest route can be provided to the destination system having the ATM address through ATM SVC. It is characterized by providing a route. In addition, for the 48-bit MAC address for the IP that can not provide a shortcut path, it is characterized by providing a hop-by-hop path using the Internet ARP.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In order to solve the problem of the existing Internet best service, the integrated name address analysis server to provide the integrated name address resolution function that saves time and cost by setting the shortcut path instead of the hop-by-hop path has two functions, namely, user requirements. It consists of a domain name resolution function for and an address resolution function for that address.

The domain name resolution function is a configuration function of a host providing an IP and an ATM interface, and the address resolution function of a corresponding address is a configuration function of a host and a router providing an ATM interface. Address resolution here includes both hop-by-hop routing via ARP and integrated shortcut routing with ATM SVC.

1 is a block diagram of a next-generation Internet network providing an integrated destination name address resolution function according to the present invention.

In the drawing, an existing IP network 101 composed of several IP stub networks (103) and an ATM network 102 composed of several LIS (Logical IP Subnets, hereinafter referred to as logical networks: 104) Shows the configuration of the next generation Internet network integrating the Internet.

In the next generation Internet network, components provide Ethernet interface and ATM interface, and two physical networks of IP network 101 and ATM network 102 are integrated and interworked to provide pure IP service, pure ATM service, and IPoA service. Assume possible nets.

Existing Internet network configuration keeps IP matching network 103 as it is, and performs name address resolution function using DNS (1) and ARP. For pure ATM service, it uses ANS (2) and ATM SVC. Perform name address resolution.

In this case, the name address resolution function includes a name resolution function that provides an IP / ATM address for a domain name, and an address resolution function that provides an actual physical address for the corresponding IP / ATM address as a MAC / ATM address. Setting up a hop-by-hop routing path and a shortcut path with an address.

IANS (3), which performs integrated name address resolution function, provides input user traffic (111, 112) and automatically classifies IP, IPoA, ATM traffic according to interface and characteristics, and can set up hop-by-hop or shortcut routing path. Let's do it. That is, the IP address for the requesting domain name is provided to the user requesting the existing Internet service (10), and the address resolution function is performed by the hop-by-hop path (1) by the ARP (30) for the provided IP. The user providing the ATM service provides the ATM address for the requested name (20), and performs the address resolution function for the shortcut path setting (1) by the ATM SVC function for the provided ATM address. If the terminal does not provide an interface for setting the shortcut path, the ATM address of the ATM-based router 121 providing such an interface is provided to configure the shortcut path to the end system connected to the ATM-based network. Here, four shortcut paths can be set from host to host, ATM to host, router to host, router to host, and router to router that provide an ATM interface. In other words, the ATM-based router 121 provides the entire routing as a hop-by-hop for the existing Internet connection, and provides a shortcut path for the connection of the ATM-based network.

2 is a detailed functional structure diagram of a host system to which the integrated destination name address analysis method of the present invention is applied.

Detailed function structure of the integrated destination name address resolution function of the host for providing the pure IP service, pure ATM service and ATM-based IP service configured in FIG.

The integrated destination name address resolution function block 200 is a name resolution function block 220 for processing IP and ATM domain names input from the user application block 210, and the address obtained by the name resolution function block 220. It consists of an address interpretation function block 230 for processing an address interpretation for.

In the integrated destination name address resolution function block 200, the user application block 210 is provided for the aforementioned pure IP, IPoA, and pure ATM services, and these user input traffics are used for ATM and IP domain name query processing. The name resolution function block 220 is passed to the ATM and IP domain name input block 221.

The query message format is the domain name of the destination host, and the response message format is the ATM address of the destination host. In the present invention, if the destination host does not provide an ATM interface, it provides an ATM address of an egress router connected to an ATM-based network.

If the queried domain name is a domain name that can be answered by the local master file 224 or the shared DB 225, the internal IP and ATM name resolution function block 222 processes the query / response, and the external name server If a function is to be used, the external IP and ATM name resolution function block 223 is used to process a query / response in an external name server sharing DB 226.

The hop-by-hop routing traffic processing block 232 by the traffic characteristics and the destination host and router interface classification block 231 with the IP and the ATM address thus replied, the hop-by-hop and shortcut traffic by the designated router IP / ATM address Either of the processing block 233 or the shortcut path traffic processing block 234 is selectively operated to establish a hop-by-hop routing path to the destination system, hop hop and short path routing by the IP / ATM address of the egress router, or destination An optional address resolution function, such as a shortcut path by the host's ATM address, is performed.

Figure 3 shows a detailed structure of the integrated address resolution function of the router system to which the integrated destination name address resolution method of the present invention is applied.

As shown in the figure, the integrated address resolution function block 300 of the router to which the present invention is applied includes an address resolution request block 310 for receiving an address resolution request of an originating host and an input of the address resolution request block 310. A routing path classification function block 321 for classifying a routing path by an address, a hop bar home routing traffic processing block 322 capable of hop-by-hop routing traffic processing, and a shortcut path traffic processing block 323 capable of short path routing traffic processing; It consists of the address interpretation function block 320 made.

Since the input traffic received from the host system of FIG. 2 is determined after the destination host and the router that can set the shortcut by the traffic classification of IANS, the shortcut path traffic processing block 323 accesses the ATM to the destination host providing the ATM address. It provides an address resolution function that can provide an ATM connection or an ATM connection to a destination egress router that provides an ATM address. Using this information, the router system provides a routing path to the corresponding physical address as a hop-by-hop or shortcut path.

4 is a flowchart illustrating an integrated destination name address resolution method according to the present invention, the first step of receiving user traffic; Classifying whether the input traffic corresponds to one of IP traffic, IPoA traffic, and pure ATM traffic; A third step of transmitting / receiving data through hop-by-hop routing by performing the name address analysis function by the existing DNS and ARP processing in the case of the IP classification result in the traffic classification result in the second step; In the case of IPoA traffic as a result of the traffic classification in the second step, the IP / ATM address of the destination host and the router is provided by the IANS query / response function, and the designated router and the source according to the interface of the destination host and the NBMA designated router. A fourth step of transmitting and receiving data through a shortcut path generated by generating a shortcut path between hosts or a shortcut path of a destination host; And in the case of pure ATM traffic as a result of the traffic classification in the second step, return the IP address of the destination host, and return the ATM / IP address of the designated router to generate a shortcut path between the designated router and the source host. The fifth step is to transmit and receive data through the shortcut path.

This will be described in detail.

First, the system accepts a user's traffic input regardless of a host or a router (S1).

Then, it classifies the input traffic and checks what kind it is (S2).

At this time, the classification of the input traffic is first classified as IP-based traffic or ATM-based traffic according to the interface provided by the system, and the ATM-based traffic is classified into IPoA traffic and pure ATM traffic according to user service.

As a result of classifying and verifying the traffic in step S2, if the pure IP traffic, the name address analysis function is performed by the existing DNS and ARP processing (S3, S3), and data transmission and reception by hop-by-hop routing is performed (S5).

After classifying and verifying the traffic in step S2, in the case of ATM-based IP traffic, that is, IPoA traffic, the IP / ATM address of the destination host and the router is provided by the IANS proposed by the present invention. S6).

Thereafter, the interface between the destination host and the non-broadcast multiple access (NBMA) designated router is classified and checked (S7).

As a result of classifying the interface in step S7, if it is an ATM interface, the ATM address of the destination host is returned (S8). In addition, after performing the address analysis function that can set the shortcut path by ATM SVC to generate the shortcut path of the destination host (S13, S14), and then transmit and receive data through the generated shortcut path (S15).

As a result of classifying and checking the interface in step S7, if it is an IP interface, the IP address of the destination host is returned (S9). The ATM / IP address of the designated router is returned to generate a shortcut path between the designated router and the source host (S10 and S11). Thereafter, data is transmitted and received through the generated shortcut path (S15).

In addition, as a result of classifying and confirming the traffic in step S2, if pure ATM traffic is performed, the integrated name address analysis function, which is capable of setting the shortcut path by the existing ANS and ATM SVC, generates a shortcut path of the destination host (S12 to S14). Thereafter, data is transmitted and received through the generated shortcut path (S15).

As described above, the present invention includes a data transmission / reception function based on an existing DNS (Domain Name System) -based hop-by-hop path setting and a data transmission / reception function by an ATM Name System (ANS) -based ATM SVC configuration. Complement and expand the integrated destination name address resolution function that enables short path routing between destination hosts or routers by utilizing the Integrated ATM Name System (IANS) function for providing Internet service based on ATM network under consideration. By using these functions, network resources can be efficiently utilized by replacing the existing hop-by-hop paths with shortcut paths. Ultimately, users can receive data according to traffic characteristics regardless of the physical environment of the network. Can be.

That is, even if the user does not distinguish whether the network interface of the configuration system is an IP interface or an ATM interface, and does not explicitly set a route, the shortcut path and the hop-by-hop path setting are automatically set according to the traffic characteristics according to IANS input traffic classification. This allows for a data transmission path that saves time and money.

The technical spirit of the present invention has been described above with reference to the accompanying drawings, but this is by way of example only and not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (5)

Based on the existing IP network 101 composed of several IP matching networks (103) and a logical network (104) with DNS (1) and several logical networks (104) and an ANS (2) In the next generation internet network that integrates the Internet of things, And an IANS 3 connected between the IP matching network 103 and the logical network 104 and the IP network 101 and the ATM network 102 to provide an integrated destination address resolution function. In the next generation Internet network, components provide Ethernet interface and ATM interface, and two physical networks of IP network 101 and ATM network 102 integrate and interwork with each other to provide pure IP service, pure ATM service, and IPoA service. Offering, Existing Internet network configuration while maintaining the IP matching network (103) state, performing the name address resolution function using DNS (1) and ARP, In case of pure ATM service, name resolution is performed using ANS (2) and ATM SVC. The IANS (3) that performs the integrated destination name address resolution function automatically classifies IP, IPoA, ATM traffic according to the interface and characteristics of the input user traffic, and establishes a hop-by-hop or shortcut routing path. Next Generation Internet Network Architecture. In the host device of the next generation Internet network, An ATM and IP domain name input block 221 that receives input traffic of the user application block 210 for ATM and IP domain name query processing to enable integrated destination name address resolution; Internal to process the query / response when the domain name queried through the ATM and IP domain name input block 221 is a domain name that can be responded by the local master file 224 or the shared DB 225. IP and ATM name resolution function block 222; And if the domain name queried through the ATM and IP domain name input block 221 needs to use an external name server function, an external IP and ATM that processes a query / response using an external name server sharing DB 226. Name resolution function block 223 consists of a name resolution function block 220 to process the IP and ATM domain name input from the user application block 210, A traffic characteristic and destination host and router interface classification block 231 for classifying traffic characteristics and destination host and router interfaces with IP and ATM addresses obtained by the name resolution function block 220; By the traffic characteristics and the destination host and router interface classification block 231, the hop-by-hop routing path to the destination system, the hop-hop and shortcut path by the IP / ATM address of the egress router, or the ATM address of the destination host, respectively. A hop-by-hop routing traffic processing block 232 for performing an address resolution function for setting up a shortcut path by the controller; Hop-by-hop and shortcut traffic processing block 233 by the designated router IP / ATM address; And an address analysis function block 230 including a shortcut path traffic processing block 234. In the router device of the next generation Internet network, An address interpretation request block 310 for receiving an address interpretation request of the originating host to enable integrated destination name address analysis; The routing path classification function block 321 for classifying the routing path by the input address of the address interpretation request block 310, and the hop-hop routing traffic processing block 322 capable of processing traffic when classified as a hop-by-hop routing path. Next-generation Internet-based router device characterized in that it comprises an address analysis function block (320) consisting of a shortcut path traffic processing block (323) capable of processing traffic when classified as a shortcut path. Shortcut route can be set by integrated destination name address analysis in next generation internet. A first step of receiving user traffic; Classifying whether the input traffic corresponds to one of IP traffic, IPoA traffic, and pure ATM traffic; A third step of transmitting / receiving data through hop-by-hop routing by performing the name address analysis function by the existing DNS and ARP processing in the case of the IP classification result in the traffic classification result in the second step; In the case of IPoA traffic as a result of the traffic classification in the second step, the IP / ATM address of the destination host and the router is provided by the IANS query / response function, and between the destination host and the NBMA (Non-Broadcast Multiple Access) designated router. A fourth step of transmitting and receiving data through a shortcut path generated by generating a shortcut path between a designated router and a source host or a shortcut host according to an interface; And In the case of pure ATM traffic as a result of the traffic classification in the second step, the IP address of the destination host is returned, and the ATM / IP address of the designated router is returned to generate a shortcut path between the designated router and the source host, thereby creating a shortcut. And a fifth step of transmitting and receiving data through the route. The method of claim 4, wherein The third step, As a result of classifying and checking the interface, if it is an ATM interface, it returns the ATM address of the destination host, performs the address resolution function that can set the shortcut path by ATM SVC, and creates the shortcut path of the destination host. As a result of classifying the interface, if it is an IP interface, it returns the IP address of the destination host and the ATM / IP address of the designated router to generate a shortcut route between the designated router and the source host. Address interpretation method.