A method, system and network node for establishing a protection path

Abstract

The present invention relates to the communication field, and discloses a method, system and network node for establishing a protection path, which are applicable to a tree-shaped multicast network, and the multicast network includes at least one multicast tree, and the multicast tree includes at least two nodes, respectively the first node and the second node, by obtaining the position difference degree between the first node and the second node, the position difference degree indicates the position of the first node and the second node difference, the position difference degree is obtained by calculating the position code of the first node and the position code of the second node, the position code indicates the position of the node in the multicast tree, when the position difference When the degree is greater than or equal to the set position difference degree threshold, the first node selects the second node as the protection node, and the first node establishes a protection path connected to the second node, achieving dynamic establishment The technical effect of protecting the path saves network resources.

Description

technical field [0001] The invention relates to the communication field, in particular to a method, system and network node for establishing a protection path. Background technique [0002] Multicast technology is a technology that sends information from one node to multiple receivers. It can be applied to many fields such as audio / video stream release, short message release, data distribution, information announcement, distance learning, and resource synchronization. It has been widely used in many fields, such as: IPTV business, distance education and so on. Now with the rapid development of IPTV services in the MAN, the application of multicast technology in the MAN has become more and more important, and the requirements for multicast technology are also getting higher and higher, such as the delay of multicast streams , jitter, and the reliability protection of multicast services when the network fails, the requirements are relatively high. For the reliability protect...

AI Technical Summary

Problems solved by technology

[0006] 1. The Bypass tunnel is pre-established and cannot be dynamically adjusted according to changes in the network topology, nor can it dynamically protect the primary LSP

[0007] 2. The bandwidth of the Bypass tunnel is generally used to protect the main LSP. All resources on the Bypass tunnel are only used after switching. When the main LSP is not faulty, resources are wasted

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