WO2009143722A1

WO2009143722A1 - Method and device for implementing differentiated services traffic engineering

Info

Publication number: WO2009143722A1
Application number: PCT/CN2009/070961
Authority: WO
Inventors: 刘小飞; 文元癸; 李振斌; 黄铁英; 吴兵
Original assignee: 深圳华为通信技术有限公司
Priority date: 2008-05-28
Filing date: 2009-03-24
Publication date: 2009-12-03
Also published as: CN101594289A

Abstract

A method and device for implementing differentiated services (Diff-Serv) traffic engineering (TE). The method includes that: at least two tunnels corresponding to different service types of services are bound into a TE tunnel group; the TE tunnel group according with service requirements is selected, when service transmission is required; different service traffic enters into different tunnels of the TE tunnel group, and the services are transmitted through the tunnels of the TE tunnel group.

Description

Method and device for realizing service traffic engineering

This application claims priority to Chinese Patent Application No. 200810098272.4, entitled "Method and Equipment for Realizing Differentiated Service Flow Engineering", issued on May 28, 2008, the entire contents of which are incorporated herein by reference. In the application.

Technical field

The present invention relates to communication technologies, and in particular, to a method and a device for implementing a service flow classification service.

Background technique

MPLS TE (Traffic Engineering, Traffic Engineering) is used when most operators build new backbone networks, as applications of IP (Internet Protocol) and Multi-Protocol Label Switching (MPLS) continue to deepen and expand. Diff-Serv (differentiated service) technology provides three networks (internet, telecommunication network, and wide-area network). When providing bandwidth guarantee, it needs to carry multiple different QoS (Quality of Service) in one network. The target of the required business. NGN (Next Generation Network), LDP over TE (Label Distribution Protocol over TE), PWE3 (Pseduo Wire Emulation Edge-to-Edge) Among the various service solutions, DS-TE (Diffserv-TE) is one of the necessary features.

As a QoS solution, Diff-Serv is mainly implemented by dividing traffic according to service type and providing different QoS guarantees based on service type. As a traffic engineering solution, MPLS TE is mainly used to optimize the use of network resources. MPLS TE allows the establishment of an LSP (Label Switch Path) tunnel based on the constrained route. The bandwidth resource can be reserved on the specified path.

DS-TE combines the advantages of the above two to optimize network resources based on traffic classified by service type, that is, different bandwidth constraints for different service types. The DS-TE divides the traffic into different CTs (Class Types) according to the bandwidth constraint model. The total bandwidth is occupied according to a certain ratio, and each CT is applied separately. Different QoS policies, such as fast forwarding services and guaranteed forwarding services, can provide strict bandwidth guarantee services and link bandwidth utilization. MPLS DS-TE is essentially a traffic engineering for each service level, and is a finer-grained traffic engineering technology. MPLS DS-TE adds a class-based function based on the original MPLS TE technology. Currently, it is mainly implemented by using an E-LSP (Exp-inferred-PSC LSP, which is derived from the packet-switched LSP). The LSP entry is set to the EXP bit appropriately, and the scheduling behavior of PHB (Per Hop Behavior) is determined by EXP.

At present, the E-LSP establishment process is complicated, and the related configuration is also complicated. The signaling and routing protocols need to be extended. Moreover, the services of the differentiated services in the E-LSP technology are transmitted through the same path, so the ability to avoid risks is not good.

Summary of the invention

The embodiments of the present invention provide a method and a device for implementing a differentiated service traffic engineering, which can implement a differentiated service traffic project simply and conveniently without extending an existing protocol, and can reduce service risks.

A method for implementing a service-division-related traffic engineering process according to the embodiment of the present invention includes: binding at least two tunnels corresponding to different service service types into a traffic engineering tunnel group; when the service transmission is required, selecting the service that meets the service requirement Traffic engineering tunnel group; traffic of different services enters different tunnels of the traffic engineering tunnel group.

A device for implementing a service-division-related traffic engineering, which is provided by the embodiment of the present invention, includes: a binding unit, configured to bind at least two tunnels corresponding to different service service types into a traffic engineering tunnel group;

a tunnel group selection unit, configured to select a traffic engineering tunnel group that meets service requirements in the traffic engineering tunnel group bound to the binding unit;

The service transmission unit is configured to transmit the service by using the tunnel in the traffic engineering tunnel group selected by the tunnel group selection unit, and the traffic of different services enters different tunnels of the traffic engineering tunnel group.

It can be seen from the technical solutions provided by the foregoing embodiments of the present invention that the method for realizing the service traffic engineering is implemented by using the tunnel technology to bind at least two tunnels corresponding to different service service types into a traffic engineering tunnel group. Selecting a traffic engineering tunnel group that meets the service requirements, and transmitting the service through the tunnel in the traffic engineering tunnel group, so that the service traffic engineering can be implemented simply and conveniently without extending the existing protocol, and different services are differently distributed to different services. Tunnels reduce business risk. DRAWINGS

1 is a flowchart of a method for implementing a service flow classification process according to an embodiment of the present invention;

2 is a schematic structural diagram of a networking applied by the method according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an apparatus for implementing a service flow classification process according to an embodiment of the present invention; FIG. 4 is a schematic diagram of a device for implementing a service flow classification service according to an embodiment of the present invention.

detailed description

Referring to FIG. 1, FIG. 1 shows a flow of a method for implementing a service flow classification process according to an embodiment of the present invention, which mainly includes the following steps:

Step 101: Establish a tunnel corresponding to different service service types.

Regardless of the tunneling protocol, it consists of the carrier of the transmission, the different encapsulation format, and the packets being transmitted. The tunnel can be established in the same manner as currently. For example, for an MPLS tunnel, an MPLS tunnel is a label switched path (LSP: Label Switch Path), which is implemented by marking the work of the distribution protocol. The tag distribution protocol is a protocol family that the Label Switch Router (LSR: Label Switch Router) notifies its FEC: Forwording Equivalence Class binding to another LSR, and uses the tag distribution protocol to exchange tags/ The two LSRs of the FEC binding information are referred to as tag distribution peer entities corresponding to the corresponding binding information. The tag distribution protocol also includes any negotiation by the tag distribution peer entity to learn about each other's MPLS capabilities.

Step 102: Bind at least two tunnels corresponding to different service service types into a traffic engineering tunnel group.

Two or more tunnels corresponding to different service service types can be selected as traffic engineering tunnel groups. For example, eight tunnels are selected to form a traffic engineering tunnel group. The service types of the eight tunnels are different, that is, The traffic engineering tunnel group can provide users with traffic transmission of 8 different service types.

Step 103: When a service transmission is required, select a traffic engineering tunnel group that meets the service requirement. When a user needs a service transmission, the ingress router can select a traffic engineering tunnel group that meets the service requirement for the user. There are many ways to choose. For example, it can be selected according to the traffic engineering tunnel group name specified by the user; it can also be selected according to a preset tunnel group policy.

When the traffic engineering tunnel group is selected according to the traffic engineering tunnel group name specified by the user, The user can be provided with a corresponding selection interface, and the user-specified traffic engineering tunnel group name is obtained through the selection interface, and the corresponding traffic engineering tunnel group is selected according to the name. It should be noted that the user refers to a service operator, and the service operator knows the attributes of each traffic engineering tunnel group and the types of services that can be supported, so that a traffic engineering tunnel group that meets the service requirements can be selected.

You can configure a tunnel group policy based on the preset tunnel group policy. For example, you can select a policy based on the service attributes and tunnel attributes, such as establishing service attributes, tunnel group names, and tunnel groups. Corresponding relationship between the attributes of the tunnels, and storing the corresponding relationship in the ingress router. When the ingress router receives the service to be transmitted, the type of the service is obtained, and then the corresponding relationship is matched according to the service type, thereby selecting A traffic engineering tunnel group that meets business needs. These tunnel group policies can be used alone or in combination.

Step 104: The service is transmitted by using a tunnel in the selected traffic engineering tunnel group. A service forwarding table corresponding to each traffic engineering tunnel group may be established in advance. The traffic engineering tunnel group includes multiple tunnels corresponding to different service types, for example, a tunnel corresponding to a voice service and a tunnel corresponding to a data service, and each tunnel has different attribute parameters (such as bandwidth, etc.) to satisfy The needs of different businesses. Therefore, the service forwarding table includes forwarding entries of all the tunnels in the traffic engineering tunnel group, and the forwarding entry includes: a service type, a tunnel identifier corresponding to the service type, and the like. When the service needs to be transmitted, the one or more tunnels are selected for the service according to the pre-established service forwarding table, for example, for the MPLS packet, according to the experiment in the MPLS packet. The domain (Exp ) selects the tunnel corresponding to the Exp. For the IP packet, the tunnel corresponding to the Cos can be selected according to the service type field (Cos: Class of Service) in the IP packet.

The process of implementing the differentiated service flow engineering in the embodiment of the present invention is further illustrated by way of example. Referring to the networking structure shown in Figure 2, RTA to RTG is a router, and RTB is an ingress router.

Establish tunnel Tunnell/0/O from RTB to RTG, service type CT0, tunnel Tunnell/0/l from RTB to RTG, service type CT1; tunnel Tunnel 1/0/0 and tunnel Tunnell/0 /l is bound to the traffic engineering tunnel group 1. Of course, in actual applications, multiple traffic engineering tunnel groups can be established as needed.

The ingress router RTB selects a qualified traffic engineering tunnel group for the service through the tunnel policy. Assume that traffic engineering tunnel group 1 is selected. It should be noted that when a traffic engineering tunnel group is selected, if a traffic engineering tunnel group is selected, any tunnel in the traffic engineering tunnel group will not be selected for other services again.

When the service transmission is required, the corresponding tunnel is selected to perform service forwarding according to the service forwarding table corresponding to the traffic engineering tunnel group 1, thereby providing different differentiated services.

It can be seen that the embodiment of the present invention implements a method for distinguishing the monthly traffic flow engineering, and uses the tunnel technology to establish a tunnel corresponding to different service service types, and binds tunnels providing different service service types to form a dedicated traffic engineering tunnel group. When traffic is transmitted, traffic of different services is entered into different tunnels of the traffic engineering tunnel group to provide differentiated services for different services, thereby implementing DS-TE simply and conveniently. The traffic of different services is transmitted through different tunnels of the traffic engineering tunnel group. The interruption of one tunnel service does not affect the services of other tunnels, thus greatly reducing the risk of services.

It should be noted that those skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium. The storage medium, such as: ROM/RAM, disk, optical disk, and the like.

The embodiment of the present invention further provides a device for implementing a service flow classification service. As shown in FIG. 3, it is a schematic diagram of the device for implementing a service flow classification service:

The device includes: a binding unit 302, a tunnel group selecting unit 303, and a service transmission unit 304, and may further include a tunnel establishing unit 301. The tunnel establishing unit 301 is configured to establish a tunnel corresponding to different service service types. The binding unit 302 is connected to the tunnel establishing unit 301, and is configured to bind at least two tunnels corresponding to different service service types into a traffic engineering tunnel group. The tunnel group selection unit 303 is connected to the binding unit 302 for selecting a traffic engineering tunnel group that meets the service requirements. The service transmission unit 304 is connected to the tunnel group selection unit 303, and is configured to pass the tunnel pair in the traffic engineering tunnel group. The service is transmitted.

In practical applications, the tunnel group selection unit 303 can perform a traffic engineering tunnel group selection operation in a plurality of different selection manners. For example, in this embodiment, the device that implements the service-division traffic engineering may further include a tunnel group name obtaining unit 305, configured to obtain a traffic engineering tunnel group name specified by the user; the tunnel group selecting unit 303 obtains the tunnel group name acquiring unit 305 according to the tunnel group name acquiring unit 305. The user-specified traffic engineering tunnel group name selects the corresponding traffic engineering tunnel group. As shown in FIG. 3, in this embodiment, the service transmission unit 304 may include: a service forwarding table storage subunit 341, a tunnel selection subunit 342, and a forwarding subunit 343. among them:

The service forwarding table storage sub-unit 341 is configured to store a service forwarding table corresponding to different traffic engineering tunnel groups; the tunnel selection sub-unit 342 is configured to select the traffic for the service according to the service forwarding table in the service forwarding table storage sub-unit 341. The tunnel in the engineering tunnel group; the forwarding sub-unit 343 is configured to forward the service to the tunnel selected by the tunnel selection sub-unit 342 for transmission.

Referring to FIG. 4, it is a schematic diagram of a device for implementing a service flow classification process according to an embodiment of the present invention: the device includes: a tunnel establishment unit 401, a binding unit 402, a tunnel group selection unit 403, a service transmission unit 404, and a tunnel group policy storage. Unit 405. The tunnel group policy storage unit 405 is configured to store a preset tunnel group policy; the tunnel establishing unit 401 is configured to establish a tunnel corresponding to different service service types; and the binding unit 402 is configured to serve at least two of the corresponding different service services. The type of the tunnel is bound to the traffic engineering tunnel group. The tunnel group selecting unit 403 is configured to select the traffic engineering tunnel group that meets the service requirements. To the embodiment, the tunnel group selecting unit 403 can be configured according to the tunnel group policy storage unit 405. The traffic tunneling group is configured by the pre-configured tunnel group policy; the service transmission unit 404 is configured to transmit the service by using the tunnel in the traffic engineering tunnel group.

The process of implementing the DS-TE by using the device of the embodiment of the present invention is consistent with the foregoing description of the method of the present invention, and is not described herein.

The device for realizing the service flow engineering in the embodiment of the present invention may be an ingress router of the service. With this device, traffic of different services can be transmitted to different tunnels of the traffic engineering tunnel group to implement DS-TE services, and the business risk is greatly reduced.

The embodiments of the present invention have been described in detail above, and the present invention has been described with reference to the specific embodiments thereof. The description of the above embodiments is only for facilitating understanding of the system and method of the present invention. Meanwhile, for those skilled in the art, The present invention is not limited by the scope of the present invention.

Claims

Rights request

A method for implementing a service flow classification service, characterized in that:

At least two tunnels corresponding to different service service types are bound to the traffic engineering tunnel group; when the service transmission is required, the traffic engineering tunnel group that meets the service requirement is selected; the traffic of different services enters the traffic engineering tunnel group Tunnel transmission.

2. The method according to claim 1, wherein the method further comprises: establishing a tunnel corresponding to different service service types.

The method according to claim 1, wherein the selecting the traffic engineering tunnel group that meets the service requirement is specifically:

The traffic engineering tunnel group is selected according to the specified traffic engineering tunnel group name or according to the tunnel group policy, where the tunnel group policy includes: a random selection policy, and/or a policy according to service attributes and tunnel attributes.

The method according to claim 1, wherein the traffic of the different services enters different tunnels of the traffic engineering tunnel group, specifically:

Selecting a tunnel in the traffic engineering tunnel group for the service according to the service forwarding table, and traffic of different services enters different tunnels of the traffic engineering tunnel group;

The service is transmitted through the tunnel.

The method according to claim 4, wherein the method further comprises: establishing a service forwarding table corresponding to each of the traffic engineering tunnel groups, where the service forwarding table includes the corresponding traffic engineering tunnel group A forwarding entry of all the tunnels, where the forwarding entry includes: a service type and/or a tunnel identifier corresponding to the service type.

6. A device for realizing a service flow engineering, characterized in that:

a binding unit, configured to bind at least two tunnels corresponding to different service service types into a traffic engineering tunnel group;

The service transmission unit is configured to transmit the service by using a tunnel in the traffic engineering tunnel group selected by the tunnel group selection unit, and traffic of different services enters different tunnels of the traffic engineering tunnel group.

The device according to claim 6, wherein the device further comprises: a tunnel establishing unit, configured to establish the tunnel corresponding to different service service types.

The device according to claim 6, wherein the device further includes: a tunnel group name obtaining unit, configured to acquire a traffic engineering tunnel group name specified by the user; The traffic engineering tunnel group name specified by the user is selected in the traffic engineering tunnel group bound to the binding unit.

The device according to claim 6, wherein the device further comprises: a tunnel group policy storage unit, configured to store a tunnel group policy; and the traffic engineering tunnel group is selected in the quantity engineering tunnel group.

The device according to claim 6, wherein the service transmission unit comprises: a service forwarding table storage subunit, configured to store a service forwarding table of the traffic engineering tunnel group; and a tunnel selection subunit, configured to: And selecting, according to the service forwarding table in the service forwarding table storage sub-unit, the tunnel in the traffic engineering tunnel group for the service, and the traffic of different services entering different tunnels of the traffic engineering tunnel group;

And a forwarding subunit, configured to forward the service to a tunnel selected by the tunnel selection subunit for transmission.