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Method and device for protecting/ restoring multicast tree

A recovery method and a multicast tree technology, which are applied in the branch office to provide special service devices, digital transmission systems, data exchange networks, etc., can solve the problems of large resource occupation and low protection efficiency, and achieve large waste of resources and low protection efficiency , time-saving and resource-saving effects

Active Publication Date: 2015-05-13
ZTE CORP
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] One of the purposes of the present invention is to provide a multicast tree protection / restoration method and device to solve the defects of low protection efficiency and large resource occupation in the prior art

Method used

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  • Method and device for protecting/ restoring multicast tree
  • Method and device for protecting/ restoring multicast tree
  • Method and device for protecting/ restoring multicast tree

Examples

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Comparison scheme
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no. 1 example

[0037] Such as figure 1 Shown is the flow chart of the first embodiment of the method of the present invention, including:

[0038] S101: Generate a trunk protection path for the trunk between every two adjacent branch nodes of the multicast tree; generate a branch protection path for the branches of the multicast tree;

[0039] The aforementioned branch nodes include a root node.

[0040] In a multicast tree, the link between the root node and the first (N=1) branch node downstream is called a "complete trunk", which is shared by all multicast members of the multicast tree. Once a failure occurs, all The data reception of multicast members; and the link between the Nth (N>=1) branch node and the N+1 branch node is called "partial trunk", which is common to all downstream nodes of the above N branch nodes , when a failure occurs, it will affect the data reception of all nodes downstream, and the "complete trunk" and "partial trunk" are collectively referred to as the trunk. ...

no. 2 example

[0051] Such as image 3 Shown is the flow chart of the second embodiment of the method of the present invention, including:

[0052] S301: Generate a trunk protection path for the trunk between every two adjacent branch nodes of the multicast tree; generate a branch protection path for the branches of the multicast tree;

[0053] S302: Generate a node protection path for the specified branch node of the above multicast tree;

[0054] Such as Figure 4 Shown is a schematic diagram of a multicast tree with node protection paths. Taking this figure as an example, the process of generating node protection paths is as follows:

[0055] According to the user policy, it is assumed that the specified branch nodes are: root node, branch node 1, branch node 2, branch node 3, ..., branch node N-1, branch node N. Starting from the root node, search the above-mentioned branch nodes along the multicast tree. After the search is completed, a node protection path 1 is generated between the...

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Abstract

The invention relates to a method and a device for protecting / restoring a multicast tree. The method comprises the following steps: generating a trunk protection path and a branch protection path for the multicast tree; when the above multicast tree fails, starting protection / restoration to determine fault position; if the fault happens on the trunk, switching the data to a corresponding trunk protection path to be transmitted; if the fault happens on the branch, switching to data to the corresponding branch protection path to be transmitted; if the fault happens on a branch node, calculating and distributing a recovery path for the branch node; and switching data to the recovery path to be transmitted. The device comprises a protection module, a fault detection module, a recovery module and a switching module. The method is easy to realize, has high protection efficiency and occupies few resources.

Description

technical field [0001] The invention relates to the field of communication network multicast services, in particular to a method and device for protecting / restoring a multicast tree. Background technique [0002] In the communication field network, multicast / multicast is a common network service, which is mostly used in streaming media services such as VOD (Video On Demand, video on demand technology), IPTV (Internet Protocol Television, interactive network television), and basic Different from point-to-point communication, it requires the establishment of a suitable channel between a single source node and multiple destination nodes to achieve point-to-multipoint data transmission. [0003] The simplest way to implement multicast is to establish multiple independent point-to-point transmission channels between the source node and the destination node, but the resource utilization rate of this method is very low. A good multicast implementation plan should fully consider th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/70H04L12/24H04L12/18H04L45/16H04L45/24
Inventor 马恒
Owner ZTE CORP
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