KR20050029773A - Traffic routing method on access gateway in integration network - Google Patents

Abstract

An access gateway in an integrated network and a traffic routing method thereof are provided to separate inputted traffic into NGN(Next Generation Network) traffic and BE(Best Effort) traffic, and to route the separated traffic to an NGN backbone network or a BE backbone network, thereby supplying an optimum network service. When access request traffic is inputted(S31), a destination IP address detector of an access gateway extracts a destination URL, and inquires of the first local DNS(Domain Name Server) about an IP address(S32). When a destination IP address is inputted from the first local DNS(S33), a routing unit detects a kind of a backbone network where a destination server is received, by applying the destination IP address to a routing table(S34). If the backbone network is a BE backbone network(S35), the access request traffic is transmitted to the BE backbone network(S36). The traffic is transmitted between a subscriber terminal and a web server(S37).

Description

Access gateway and its traffic routing method in integrated network {Traffic routing method on Access Gateway in Integration Network}

The present invention is classified into NGN traffic and best effort level BE traffic, which guarantees the quality of service of the access gateway in the Next Generation Network (NGN), and transmits them to the NGN backbone network and the BE backbone network. The present invention relates to an access gateway in a network and a traffic routing method thereof.

Next generation communication network (NGN) evolves through NGN introduction, NGN-based, and NGN completion. The NGN introduction and NGN infrastructure are the stages at which gateways are introduced for the introduction of new services and service integration, and the NGN complete is the stage of integration into one network.

Meanwhile, many subscribers are using the service by joining the best effort (BE) backbone network. The BE backbone network will play a role as the backbone of the network in parallel with the NGN introductory and NGN-based bases, and it will be integrated with the NGN network in the NGN completion unit in the future. Therefore, since NGN introduction and NGN base are parallel with NGN backbone network and BE backbone network, traffic needs to be classified according to the characteristics of each network at this time. Such traffic classification is preferably performed at the network element closest to the subscriber, that is, at an access gateway that accommodates the subscriber terminal.

However, since the proposed access gateway does not include a routing function, there is a problem in that the NGN backbone network and the BE backbone network cannot be used in a network environment.

The present invention has been made to solve the above-mentioned problems of the prior art, and separates the incoming traffic into NGN traffic and BE traffic and routes them to the NGN backbone network or the BE backbone network, thereby optimizing the service required by the subscriber. It is to provide a method for providing a network service.

An access gateway in an integrated network according to the present invention for achieving the above object is a subscriber terminal that interfaces with the subscriber terminal in an integrated network that accommodates a next generation network (NGN) backbone and a best effort (BE) backbone network. Matching unit;

An NGN backbone network matching unit for interfacing with the NGN backbone network;

A BE backbone network matching unit for interfacing with the BE backbone network;

A destination IP address detection unit for detecting a destination IP address of a connection request traffic inputted from the subscriber terminal through the subscriber terminal matching unit;

Detecting the backbone network accommodated by the server of the destination IP address detected by the destination IP address detection unit, and forwarding the access request traffic to the NGN backbone network or BE backbone network through the NGN backbone network matching unit or the BE backbone network matching unit. A routing unit;

It stores a backbone network information for each IP address, characterized in that it comprises a routing table provided to the routing unit.

In addition, the traffic writing method of the access gateway according to the present invention, in an integrated network that accommodates the next generation network (NGN) backbone network and the best effort (BE) backbone network,

A first step of the access gateway storing backbone network information for each IP address;

A second step of, when the traffic is input from a subscriber station, the access gateway obtaining a destination IP address of the traffic;

A third step of the access gateway recognizing a backbone network in which the server of the destination IP address is accommodated;

As a result of the third step, if the backbone network in which the server of the destination IP address is accommodated is an NGN backbone network, the traffic is delivered to the NGN backbone network; and if the backbone network in which the server of the destination IP address is accommodated is a BE backbone network, the traffic is transmitted. And a fourth step of delivering to the BE backbone network.

Hereinafter, an access gateway and a traffic routing method thereof in an integrated network according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating an integrated network to which the present invention is applied. The integrated network is a network that accommodates the NGN backbone network and the BE backbone network. The NGN backbone network 110 and the BE backbone network 120 are connected to an access gateway 100 that accommodates a plurality of subscriber terminals. The access gateway 100 and the NGN backbone network 110 are connected through the first label edge router 111, and the access gateway 100 and the BE backbone network 120 are connected through the first gigabit switching router 121. do. In addition, the NGN server 112 and the NGN backbone network 110 accommodated in the NGN backbone network 110 are connected through the second label edge router 113, and the first label edge router 111 and the second label edge router are connected to each other. 113 is connected via a label switch router 114. In addition, the web server 122 accommodated in the BE backbone network 120 and the BE backbone network 120 are connected through a second gigabit switching router 123. Each gigabit switching router 121, 123 is connected with a first local domain server 124 and a second local domain server 125. Subscriber terminals accommodated in the access gateway 100 include a VoIP phone 101, a black phone 102, and a data terminal 103.

According to the type of traffic input from the subscriber station, the access gateway 100 transmits a quality of service guarantee traffic, that is, NGN traffic, to the NGN backbone network, and transfers best effort traffic, that is, BE traffic, to the BE backbone network.

2 is a block diagram illustrating an access gateway 100 according to an embodiment of the present invention. The access gateway 100 includes a subscriber station matching unit 21, a destination IP address detection unit 22, a routing unit 23, a routing table 24, an NGN backbone network matching unit 25, and a BE backbone network matching unit 26. It includes.

The subscriber station matching unit 21 performs an interface function with the subscriber station, and the destination IP address detection unit 22 detects the destination IP address from the traffic input from the subscriber station. The routing unit 23 detects whether the destination IP address detected by the destination IP address detection unit 22 is an NGN server accommodated in the NGN backbone network 110 or a web server accommodated in a BE backbone network. Or route to the BE backbone network matching unit 26. The routing table 24 stores the backbone network information for each IP address and provides the same to the routing unit 23.

The NGN backbone matching unit 25 is connected to the first label edge router 111 to perform an interface function with the NGN backbone network 110, and the BE backbone matching unit 26 is connected to the first gigabit switching router 121. It is connected to perform an interface function with the BE backbone network 120.

3 is an operation flowchart illustrating a traffic routing method of an access gateway according to the present invention. The operation of the access gateway will be described with reference to FIG. 3.

When the access request traffic is input from the subscriber terminal (S31), the destination IP address detection unit 22 of the access gateway 100 extracts a destination resource URL (uniform resource locator) of the access request traffic and extracts an IP address corresponding to the corresponding URL information. The first local domain server 124 inquires (S32).

Then, the first local domain server 124 sends a query to the upper domain name server, and the upper domain name server finds a corresponding IP address of an authorized name server and returns it to the first local domain server 124. give. The first local domain name server 124 provides the routing unit 23 with the destination IP address received from the upper domain name server.

When the destination IP address is input from the first local domain server 124 (S33), the routing unit 23 applies the corresponding destination IP address to the routing table 24 to detect the type of backbone network accommodated by the destination server. (S34). If the backbone network to which the destination server having the corresponding destination IP address belongs is the BE backbone network (S35), the access request traffic inputted from the subscriber terminal is transferred to the BE backbone network 120 (S36), as shown in FIG. The traffic is transmitted between the subscriber terminal and the web server 122 (S37).

Meanwhile, if the backbone network to which the destination server having the corresponding destination IP address belongs is the NGN backbone network in step S35, the access request traffic inputted from the subscriber station is transferred to the NGN backbone network 110 (S38), and FIG. As described above, traffic is transmitted between the subscriber station and the NGN server 112.

4 is a view showing a transmission path of the BE traffic in the integrated network according to the present invention, Figure 5 is a view showing a transmission path of the NGN traffic in the integrated network according to the present invention.

Referring to FIG. 4, the traffic transmitted from the subscriber terminal to the web server 122 includes the access gateway 100, the first gigabit switching router 121, the BE backbone network 120, and the second gigabit switching router 123. After passing through the web server 122, the traffic transmitted from the web server 122 to the subscriber terminal is the second gigabit switching router 123, BE backbone network 120, the first gigabit switching router 121, access gateway It is delivered to the subscriber terminal via.

Referring to FIG. 5, the traffic transmitted from the subscriber station to the NGN server 112 includes the access gateway 100, the first label edge router 111, the label switch router 114, and the second label edge router 113. The traffic transmitted to the NGN server 112 and transmitted from the NGN server 112 to the subscriber terminal is transmitted to the second label edge router 113, the label switch router 114, the first label edge router 111, and the access gateway. It is delivered to the subscriber terminal via (100).

Although the technical spirit of the present invention has been described above with reference to the accompanying drawings, it is intended to exemplarily describe the best embodiment of the present invention, but not to limit the present invention. In addition, it is obvious that any person skilled in the art may make various modifications and imitations without departing from the scope of the technical idea of the present invention.

As described above, according to the present invention, since the NGN service and the BE service can be provided to the subscriber by using the destination IP address of the incoming traffic, there is an advantage that can satisfy the needs of various subscribers.

1 is a diagram illustrating a network integrating an NGN backbone network and a BE backbone network to which the present invention is applied;

2 is a block diagram illustrating an access gateway according to an embodiment of the present invention;

3 is an operation flowchart illustrating a traffic routing method of an access gateway according to the present invention;

4 is a diagram illustrating a transmission path of BE traffic in an integrated network according to the present invention;

5 is a diagram illustrating a transmission path of NGN traffic in the integrated network according to the present invention.

<Brief description of symbols for the main parts of the drawings>

100; Access gateway 110; NGN Backbone Network

111; A first label edge router 112; NGN Server

113; Second label edge router 114; Label Switch Router

120; BE backbone 121; First Gigabit Switching Router

122; Web server 123; Second Gigabit Switching Router

124; A first local domain name server 125; Second Local Domain Name Server

21; Subscriber terminal matching unit 22; Destination IP Address Detection Department

23; A routing unit 24; Routing table

25; NGN backbone network matching unit 26; BE backbone network matching department

Claims (4)

In an integrated network that accommodates a next generation network (NGN) backbone and a best effort (BE) backbone network, an access gateway connecting a subscriber station and the NGN backbone network or a BE backbone network, A subscriber terminal matching unit for interfacing with the subscriber terminal; An NGN backbone network matching unit for interfacing with the NGN backbone network; A BE backbone network matching unit for interfacing with the BE backbone network; A destination IP address detection unit for detecting a destination IP address of a connection request traffic inputted from the subscriber terminal through the subscriber terminal matching unit; Detecting the backbone network accommodated by the server of the destination IP address detected by the destination IP address detection unit, and forwarding the access request traffic to the NGN backbone network or BE backbone network through the NGN backbone network matching unit or the BE backbone network matching unit. A routing unit; An access gateway in an integrated network, comprising a routing table storing backbone network information for each IP address and providing the routing unit. The method of claim 1, wherein the destination IP address detection unit extracts a destination resource locator (URL) of the access request traffic, and inquires a destination IP address from a domain name server (DNS), and retrieves the destination IP address from the domain name server. Access gateway in the integrated network, characterized in that receiving input. In an integrated network that accommodates a next generation network (NGN) backbone and a best effort (BE) backbone network, a traffic routing method of an access gateway connecting a subscriber station and the NGN backbone network or a BE backbone network, A first step of the access gateway obtaining backbone network information for each IP address; A second step of, when the traffic is input from the subscriber station, the access gateway obtaining a destination IP address of the traffic; A third step of the access gateway recognizing a backbone network in which the server of the destination IP address is accommodated; As a result of the third step, if the backbone network in which the server of the destination IP address is accommodated is an NGN backbone network, the traffic is delivered to the NGN backbone network; and if the backbone network in which the server of the destination IP address is accommodated is a BE backbone network, the traffic is transmitted. And a fourth step of delivering to the BE backbone network. The method of claim 3, wherein the second step, And extracting a destination resource locator (URL) of the traffic, querying a domain name server (DNS) for a destination IP address, and receiving the destination IP address from the domain name server.