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Segment protection method for MPLS-TP network

A network and protection segment technology, applied in the field of protection switching, can solve problems such as protection and inability to provide inter-segment nodes, and achieve the effect of balancing protection

Inactive Publication Date: 2009-11-25
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional non-overlapping segment protection cannot provide protection for inter-segment nodes, and overlapping segment protection successfully overcomes this shortcoming. Due to the overlap between adjacent segments, the failure of inter-segment nodes will not cause work Simultaneous failure with the protection segment

Method used

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  • Segment protection method for MPLS-TP network
  • Segment protection method for MPLS-TP network
  • Segment protection method for MPLS-TP network

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Embodiment Construction

[0021] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] figure 1 Shown is an LSP working path machine protection segment path in the MPLS-TP network, where the working LSP is R1→R2→R3→R4→R5→R6→R7→R8→R9. Here, the overlapping segment protection mechanism is taken as an example. The LSP is divided into three working segments (WS), namely: WS1(R1→R2→R3→R4), WS2(R3→R4→R5→R6→R7), WS3(R6→R7→R8→R9) . The corresponding protection sections (PS) are: PS1 (R1→r1→r2→R4), PS2 (R3→r3→r4→r5→R7), PS3 (R6→r6→r7→R9).

[0023] The transmission path of the Path message including the PSO is the working LSP (R1→R2→R3→R4→R5→R6→R7→R8→R9).

[0024] figure 2 Shown is the message format of the protection segment object (PSO), and its structure is as follows:

[0025] ●Message type: 8bit, indicating the type of the control object;

[0026] ●LSP ID: 16bit, indicating the LSP number of the working path protected by the pro...

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Abstract

The invention is a segment protection method for MPLS-TP network. the method notifies the information of each protection segment to all nodes on the protected LSP by combining RSVP-TE signaling, so that after the fault is generated, the fault information can be effectively notified to the protection segment starting point of the fault by the fault downstream node. Then, the starting point can switch the service influencing by the fault on the protection segment indicated by a display protection route according to the stored display protection route information b oneself to implement the protection of the fault service. According to the method of the invention, the segment protection of LSP in the MPLS-TP can be implemented, the lower network resource occupancy rate and the shorter protection switching time can be obtained.

Description

technical field [0001] The invention relates to a protection switching method in a communication network, in particular to a section protection switching method of a label switching path (LSP) in an MPLS-TP network. Background technique [0002] MPLS-TP technology is an extension of MPLS technology at the transport layer. This technology uses the same forwarding mechanism as MPLS, that is, uses labels to implement edge routing and core forwarding. In the MPLS-TP network, the label packet is transmitted along the LSP, and the forwarding process is actually the process of label switching operation. [0003] Today, with the development and wide application of wavelength division multiplexing (WDM) and photonic crystal technology, the transmission bandwidth of a single optical fiber can reach 1Tb / s. Such a huge bandwidth makes the network have more stringent requirements for business continuity and data integrity. The survivability of the network has become one of the key issu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04L12/56H04L45/28
Inventor 陆月明程蓉纪越峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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