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One-pass path setup-based MPLS-TP network efficient and fast bidirectional LSP generation method

A one-way and fast technology, applied in data exchange networks, digital transmission systems, electrical components, etc., can solve the problems of control overhead, road construction time and path activation time redundancy, etc., to shorten the waiting time, reduce the control overhead, The effect of reducing the number of times

Active Publication Date: 2016-04-06
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the existing MPLS-TP network two-way LSP generating method because of the use of two-way or multi-way road construction methods, there are redundant problems in control overhead, road construction time and path activation time, the present invention adopts the following technical solutions:

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  • One-pass path setup-based MPLS-TP network efficient and fast bidirectional LSP generation method
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  • One-pass path setup-based MPLS-TP network efficient and fast bidirectional LSP generation method

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Embodiment Construction

[0025] The present invention proposes an efficient and fast two-way LSP generation method for MPLS-TP network based on one-way road construction. And the four new mechanisms of "build and use" can reduce control overhead, reduce road construction time, and speed up path activation.

[0026] (1) The principle of the new mechanism proposed by the present invention

[0027] The following specifically introduces the principles of four new mechanisms proposed by the present invention

[0028] 1. One-way road construction

[0029] In the new method proposed by the present invention, the label assigned by the upstream node to the downstream node is also used by LSPs in both forward and reverse directions. Therefore, only one-way end-to-end Path message transmission is required to complete the establishment of a bidirectional LSP (in order to establish a reverse LSP entry, the Path message needs to carry the source node address Srcaddr). However, the existing two-way LSP generation...

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Abstract

The invention discloses a one-pass path setup-based MPLS-TP network efficient and fast bidirectional LSP generation method, four kinds of new mechanisms, namely, one-pass path setup, forward path setup, two-dimensional duplication avoidance, and setup and play are adopted, and therefore, the problem of redundancy in control cost, path setup time consumption and path enabling time in an existing MPLS-TP network bidirectional LSP generation method due to the use of a dual-pass or multi-pass path setup mode can be solved, and therefore, cost can be controlled, and path setup time consumption can be decreased; and since the path enabling time is shortened, the waiting time of data packets on a source LSR is shorter. The operation of the one-pass path setup-based MPLS-TP network efficient and fast bidirectional LSP generation method includes the following three stages that: the source LSR transmits a control message; an intermediate LSR forwards the control message; and a destination LSR receives the control message; the two new work mechanisms, namely, one-pass path setup and forward path setup work in all the three stages, and the other two new work mechanisms, namely, two-dimensional duplication avoidance and setup and play work in the stage in which the source LSR transmits the control message, and in the stage in which the intermediate LSR forwards the control message.

Description

technical field [0001] The invention belongs to the field of using MPLS-TP (Multi-Protocol Label Switching-Transport Profile) network technology, and particularly relates to the process and method of generating bidirectional LSP (Label-Switched Path) in this type of network. Background technique [0002] The packet switching network technology MPLS-TP (Transport Profile) obtained by extending the MPLS (Multi-Protocol Label Switching) architecture has attracted people's attention in recent years. As a product of the integration and development of transmission and data technologies, MPLS-TP is committed to realizing connection-oriented cross-domain packet transmission in the network. It simplifies part of the content of MPLS technology and expands it in multiple links, gradually becoming an adaptive service. The mainstream technology of IP and network packetization. [0003] MPLS-TP absorbs the two-way LSP technology in GMPLS (Generalized Multi-Protocol Label Switching), so t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/723H04L12/727H04L45/50H04L45/121
CPCH04L45/121H04L45/507
Inventor 任智李桂林张剑波金鑫文安黄盛
Owner CHONGQING UNIV OF POSTS & TELECOMM