KR20100062783A - Method and apparatus for providing different next hop by service - Google Patents

Abstract

PURPOSE: A routing method for offering a different path for each service and a device thereof are provided to construct topology according to various services by using one router. CONSTITUTION: A service identification module(110) decides a service ID representing a service which packet requests by using a header within the packet. A plural service forwarding tables(130) stores a different next hop for each service such as a voice call, VoIP(Voice over Internet Protocol), VOD(Video on Demand) and IPTV(Internet Protocol Television) etc. A hop search module(120) decides a next hop of the packet by searching a service forwarding table corresponding to the service ID in a plurality of service forwarding tables.

Description

Routing method and device for providing different route by service {Method and Apparatus for Providing Different Next Hop by Service}

The present invention relates to a routing method and apparatus for providing a different route for each service, and more particularly, to a routing method for identifying a service of a packet to have a separate next hop for each service to determine a next hop of the packet, and Relates to a device.

The present invention is derived from research conducted as part of the IT growth engine technology development project of the Ministry of Knowledge Economy and the Ministry of Information and Communication Research and Development. [Task management number: 2008-S-010-01, Task name: Multi-layer optical network control platform technology Development]

Recent communication services are all changing to IP-based services. The IP network is configured based on a router, and the router determines a next hop for a specific destination IP address by routing protocol exchange.

Due to the structure of the existing IP network and the forwarding function of the router, packets having the same destination IP address are delivered through the same path except in the special case of applying the load balancing function. As a result, premium IP traffic and best IP traffic are transmitted through the same path, and quality degradation occurs due to mutual interference. In order to solve this problem, in the current network, it is common to separate and configure a premium IP service network, and at the same time, a specific service (for example, Voice over Internet Protocol (VoIP), Video on Demand (VOD), and Internet Protocol Television (IPTV)). , Etc.), a specific terminal is used and a separate IP is assigned to operate the network.

However, in the future IP service, one terminal is a multi-function terminal that simultaneously provides a premium service and a best-in-class service, and must have a function of providing a quality of service (QoS) in units of service sessions or IP flows. Depending on the service, the router should be able to determine a different next hop for each service, even if the services are not identical.

However, current technology has a problem in that it is necessary to establish a separate premium network and give a separate terminal and IP address to provide premium IP service.

The present invention has been made to solve the above-described problems, routing for providing a different path for each service to identify the service corresponding to the packet in determining the next hop of the packet to have a separate next hop. Its purpose is to provide a method and apparatus.

The present invention for achieving the above object comprises a service identification module for determining a service ID indicating a service requested by the packet using a header in the packet; A plurality of service forwarding tables for storing different next hops for each service; And a hop search module for searching for a service forwarding table corresponding to the service ID in the plurality of service forwarding tables to determine a next hop of the packet.

The present invention includes the steps of: determining a service ID indicating a service requested by the packet using a header in the packet; And determining a next hop of the packet by searching a service forwarding table corresponding to the service ID in a plurality of service forwarding tables having different next hops for each service. It provides a routing method.

As described above, according to the present invention, by configuring a topology for each service using a single router, it is possible to reduce the inefficiency of having to separately establish a router network for each service. There is an effect that can easily cope with the situation provided by one terminal.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Example

1 is a block diagram illustrating a schematic internal configuration of a routing device for providing a different route for each service according to an embodiment of the present invention.

Referring to FIG. 1, the routing device 100 according to the present invention includes a service identification module 110, a hop search module 120, a plurality of service forwarding tables 130, and the like.

The service identification module 110 uses the header in the packet to determine a service ID representing the service requested by the packet. In detail, the service identification module 110 determines the service ID by the combination of the information of the IP header and the information of the IP header in the packet, or the combination of the information of the TCP / UDP header in the packet and the information of the IP header in the packet. Determine the service ID.

In addition, the service identification module 110 determines a service ID by designating or canceling service identification criteria in a network and service control layer (eg, Resource and Admission Control Functions (RACF)) on a service session basis and on a flow basis. For example, the service ID is determined in 5-tuple flow units.

The plurality of service forwarding tables 130 stores different next hops for each service such as voice call, Voice over Internet Protocol (VoIP), Video on Demand (VOD), and Internet Protocol Television (IPTV).

The hop search module 120 searches the service forwarding table corresponding to the service ID in the plurality of service forwarding tables 130 to determine the next hop of the packet.

The routing device 100 according to the present invention further includes a basic forwarding table 140 that stores a next hop preset by an operator or a network management system. When the hop search module 120 determines a next hop of a packet, If the service forwarding table corresponding to the service ID does not exist, the default forwarding table 140 is searched to determine the next hop of the packet.

In addition, the routing device 100 according to the present invention, the routing information of the plurality of service forwarding table 130 to the provisioning (Provisioning) method through the operator or the network management system or a service capable of mutual routing between routers through a routing protocol Exchange and exchange IP address information. Detailed description thereof will be described later with reference to FIG. 2.

2 is a diagram illustrating a method for exchanging routing information for each service of a router device according to an embodiment of the present invention.

Referring to FIG. 2, the first router device 210 provides a first service, a second service, and a basic service, and the second router device 220 provides a first service and a fourth service. In this case, the first router device 210 and the second router device 220 provide the first service in common and consequently exchange routing information of each of the first service forwarding table 214 for the first service. To update the first service forwarding table 214. That is, each router device ignores routing information for a service that is not in the service providing list 212 and 222 through the routing protocol, and the routing information for the service in the service providing list 212 and 222 is routed. When received over the protocol, it updates its service forwarding table to provide the next hop for the related service.

In addition, the basic forwarding table 140 corresponding to the basic service in FIG. 1 and FIG. 2 preferably stores a path for providing the best service in the existing IP network or stores a backup path. Accordingly, when the service forwarding table corresponding to the service ID does not exist when determining the next hop of the packet, the next hop of the packet is determined by searching the basic forwarding table 140.

3 is a flowchart illustrating a routing method for providing a different route for each service according to an embodiment of the present invention.

Referring to FIG. 3, the service identification module 110 determines a service ID indicating a service requested by a packet using a header in the packet (S310). At this time, the service identification module 110 determines the service ID by the combination of the information of the IP header and the information of the IP header in the packet, or the service by the combination of the information of the TCP / UDP header in the packet and the information of the IP header in the packet. The service ID is determined by specifying or canceling an ID or by specifying or canceling a service identification criterion for each service session and flow unit in the network and service control layer.

Next, the hop search module 120 determines whether a service forwarding table corresponding to the service ID exists in the plurality of service forwarding tables 130 (S320), and corresponds to the service IDs in the plurality of service forwarding tables 130. If there is a service forwarding table, the next hop of the packet is determined according to the next hop stored in the service forwarding table corresponding to the service ID (S330).

In step S320, if the service forwarding table corresponding to the service ID does not exist in the plurality of service forwarding tables 130, the hop search module 120 next to the packet according to the next hop preset in the basic forwarding table 140. The hop is determined (S322).

4 is a diagram illustrating an application example of a routing method for each service according to the present invention.

As shown in FIG. 4, although there is only one IP topology, the L4 / session layer operates in a variety of ways as if there is a separate network topology for each service, thereby improving user satisfaction for each service. .

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1 is a block diagram showing a schematic internal configuration of a routing device for providing a different route for each service according to an embodiment of the present invention;

2 is a view showing a routing information exchange method for each service of a router device according to an embodiment of the present invention;

3 is a flowchart illustrating a routing method for providing a different route for each service according to an embodiment of the present invention;

4 is a diagram illustrating an application example of a routing method for each service according to the present invention.

<Description of Symbols for Main Parts of Drawings>

110: service identification module 120: hop search module

130: multiple service forwarding table 140: basic forwarding table

Claims (9)

A service identification module for determining a service ID indicating a service requested by the packet using a header in the packet; A plurality of service forwarding tables for storing different next hops for each service; And A hop search module for searching for a service forwarding table corresponding to the service ID in the plurality of service forwarding tables to determine a next hop of the packet; Routing device for providing a different route for each service comprising a. The method of claim 1, And the service identification module determines the service ID based on a combination of the information of the IP header and the information of the IP header in the packet. The method of claim 1, And the service identification module determines the service ID based on a combination of the information of the TCP / UDP header in the packet and the information of the IP header in the packet. The method of claim 1, The service identification module is a routing device for providing a different route for each service, characterized in that for determining the service ID by specifying or canceling the service identification criteria for each service session and flow units in the network and service control layer. The method of claim 1, And the routing device exchanges routing information of the plurality of service forwarding tables with another routing device through a routing protocol for a service that is mutually routable. Determining a service ID representing a service requested by the packet using a header in the packet; And Determining a next hop of the packet by searching for a service forwarding table corresponding to the service ID in a plurality of service forwarding tables having different next hops for each service; Routing method for providing a different route for each service comprising a. The method of claim 6, wherein the determining of the service ID comprises: And determining the service ID based on a combination of the information of the IP header and the information of the IP header in the packet. The method of claim 6, wherein the determining of the service ID comprises: And the service ID is determined by a combination of information of a TCP / UDP header in the packet and information of an IP header in the packet. The method of claim 6, wherein the determining of the service ID comprises: A routing method for providing a different route for each service, characterized in that the service ID is determined by specifying or canceling service identification criteria for each service session and for each flow in the network and service control layer.

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