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Method and system for implementing differential service flux engineering of multi-protocol label switching network

A multi-protocol label and service flow technology, applied in the field of MPLS network differential service flow engineering, it can solve the problems of distinguishing service categories, and it is impossible to provide bandwidth guarantees for different service categories, and achieves the effect of fine-grained

Inactive Publication Date: 2008-03-05
HUAWEI TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0006] It can be seen that because the current E-LSP scheme only distinguishes the hop-by-hop behavior of data packets, and does not distinguish between service categories, it is impossible to provide bandwidth guarantees based on different service categories.

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  • Method and system for implementing differential service flux engineering of multi-protocol label switching network
  • Method and system for implementing differential service flux engineering of multi-protocol label switching network

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] In order to implement differentiated services in MPLS, it is necessary to add an object related to differentiated services—the DiffServ object—to carry differentiated service parameters in the Path message for establishing an LSP.

[0037] Figure 1 is a schematic diagram of the structure of the DiffServ object in the Path message. As can be seen from Figure 1, DiffServ objects include:

[0038] Rerservd field: 28 bits, this field is reserved, set to 0 when sending, and ignored when receiving;

[0039] MAPnb field: 4 bits, indicating the number of MAP entries contained in the DiffServ objec...

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PUM

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Abstract

The method includes following key points: when the method establishes LSP, entrance LSR or transmit LSR carries service quality parameter (SQP) relevant to resource allocation in Path message; after receiving Path message, transmit LSR puts apart bandwidth resource for traffic flow based on SQP; after LSP is established, transmit LSR of receiving traffic flow determines bandwidth of traffic flow put apart, and forwards traffic flow according to bandwidth put apart. The invention also discloses system for implementing DS-TE of MPLS network. The system includes entrance LSR, transmit LSR, and exit LSR. Thus, the invention can allocate bandwidth resources based on different types of traffic flow, and further can thin granularity of traffic flow engineering.

Description

technical field [0001] The present invention relates to multi-protocol label switching (MPLS, Multiple Protocol Label Switch) and flow engineering (TE, Traffic Engineering) technology, relate in particular to a kind of method and system. Background technique [0002] Traffic Engineering (TE) in the MPLS network can realize resource reservation, fault tolerance and transmission resource optimization, and DiffServ can realize scalable network design through multi-level services. MPLS DiffServ-TE combines the advantages of DiffServ and TE, can provide strict quality of service (QoS, Quality of Service) guarantee, and can optimize the use of network resources. [0003] According to the DiffServ mechanism supported by MPLS described in RFC 3270, the label switching router (LSR) only makes forwarding decisions based on the MPLS header of the data packet, thereby judging the hop-by-hop behavior (PHB) of the data packet. A three-bit EXP field is allocated in the MPLS header to rea...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L29/06H04L12/24H04L12/54
CPCH04L45/50H04L12/5695H04L47/724H04L47/825H04L47/2408H04L47/805H04L45/302H04L47/70
Inventor 阿密特·克李振斌
Owner HUAWEI TECH CO LTD
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