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Connection building method and device for transponding neighbour-lable switching path

A technology for label switching path and connection establishment, which is applied in the field of connection establishment of forwarding neighbor-label switching path, and can solve the problem of not guaranteeing FA-LSP client signals.

Active Publication Date: 2012-05-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, although signaling messages can be used to establish FA-LSPs in the service layer network, there is no guarantee that the FA-LSP can carry client signals that meet the requirements of the client layer network.

Method used

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  • Connection building method and device for transponding neighbour-lable switching path
  • Connection building method and device for transponding neighbour-lable switching path
  • Connection building method and device for transponding neighbour-lable switching path

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Embodiment 1

[0037] As shown in FIG. 1(a), a method for establishing a FA-LSP connection provided by an embodiment of the present invention is applied to the first node as the penultimate hop node in the FA-LSP to be established. The method includes:

[0038] 101. Acquire a first connection establishment request message, where the first connection establishment request message includes FA-LSP signal and adaptation information and FA-LSP client layer signal and adaptation information.

[0039] Wherein, the signal and adaptation information of the FA-LSP may include the signal type of the FA-LSP to be established and the adaptation mode of the FA-LSP, or may only include the signal type of the FA-LSP to be established, and the FA-LSP The client layer signal and adaptation information of the FA-LSP to be established may include the adaptation relationship of the client signal to be supported by the FA-LSP to be established and the adaptation mode to be supported by the FA-LSP to be established...

Embodiment 2

[0062] In order for those skilled in the art to better understand the technical solution provided by the embodiment of the present invention, the method for establishing an FA-LSP connection provided by Embodiment 2 of the present invention is now described in detail.

[0063]Please refer to FIG. 2(a). FIG. 2(a) is a network system architecture provided by an embodiment of the present invention. The network system architecture includes a multi-layer network. As can be seen from FIG. 2(a), in a multi-layer network, Nodes A, B, C and D are located in the service layer network, nodes X and Y are located in the client layer network, node X is connected to node A, node Y is connected to node D, node A is connected to node B through link 1, node B is connected to Node C is connected through link 2, and node C and node D are connected through links 3, 4 and 5. The thick line in Fig. 2 (a) represents a connection through nodes A, B, C and D in the service layer network, i.e. FA-LSP, i...

Embodiment 3

[0106] The method described in the second embodiment above can be applied in an optical transport network (Optical Transport Network, hereinafter referred to as OTN). In the OTN, the client signal type generally includes: ODU0 (Optical channel Data Unit, optical channel data unit), ODU1, ODU2, ODU2e, ODU3 and ODUflex, the adaptation method of client signals is usually called "multiplexing" or "mapping". Among them, for example, "multiplexing" usually means adapting ODUj to ODUk (j<k); "mapping" usually means adapting ODUk to OTUk (Optical channel Transport Unit, Optical Channel Transport Unit) . The adaptation mode includes at least one of the following information: a time slot granularity type (Tributary Slot Granularity, hereinafter referred to as TSG), and a payload type (Payload Type, hereinafter referred to as PT). Optionally, the adaptation manner may also include a framing procedure. In the case of determining the client signal type and the TSG in the adaptation metho...

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Abstract

The embodiment of the invention discloses a connection building method and a device for transponding a neighbour-lable switching path, relating to the network technology field, and guaranteeing that a client signal capable of satisfying client layer network demands can be loaded after an FA-LSP is built. The technical scheme provided by the invention comprises obtaining a first connection building request message; according to type information, first adaptive information and link opposite end information saved by a first node, determining a purpose link; sending a second connection building request message in which purpose link information is carried to a lodge node, so that the lodge node builds a connection according to the second connection building request message and the first node via the purpose link.

Description

technical field [0001] The present invention relates to the field of network technology, in particular to a connection establishment method and device for a forwarding neighbor-label switching path. Background technique [0002] The control plane mainly executes protocols including link management, routing, and signaling, and correspondingly realizes the functions of automatic link discovery, path calculation, and automatic path establishment in the network. Control plane technology can be applied to various types of transport networks. Currently, the Internet Engineering Task Force (hereinafter referred to as IETF) standard organization has defined a general multi-protocol label switching (General Multi-Protocol Label Switching, hereinafter referred to as GMPLS) protocol stack to implement the control plane various functions. Wherein, in terms of using signaling to establish a path, the standard adopts a Resource Reservation Protocol-Traffic Engineering (Resource ReserVat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L45/50
CPCH04W76/02H04J3/1652H04J14/0227H04L12/4633H04W76/10
Inventor 林毅章发太
Owner HUAWEI TECH CO LTD
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