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Method for constructing multiple-core sharing multicast tree

A construction method and technology of sharing groups, applied in radio transmission systems, electrical components, transmission systems, etc., can solve problems such as single-point failure, business concentration, etc., to avoid bottleneck problems, balance business traffic, and reduce update and maintenance costs. Effect

Inactive Publication Date: 2010-01-20
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the core node of the single-core shared tree is prone to business concentration and single-point failure, it may become the bottleneck of the entire multicast tree. The tree method has certain limitations

Method used

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  • Method for constructing multiple-core sharing multicast tree
  • Method for constructing multiple-core sharing multicast tree
  • Method for constructing multiple-core sharing multicast tree

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Experimental program
Comparison scheme
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Embodiment Construction

[0024] Such as figure 1 As shown, it is a schematic diagram of the multi-core shared multicast tree structure in the hemispheric satellite network formed at the virtual satellite position of the present invention. The hemispherical satellite network includes four subnets. In each subnet, a member node is a core node. White dots represent other member nodes with black dots; subnet 1 includes 3 member nodes, subnet 2 includes 4 member nodes, subnet 3 includes 6 member nodes, and subnet 4 includes 2 member nodes; The member nodes in the same subnet are connected into a tree structure with the core node as the root, which is called a multicast sub-tree; the core nodes of each subnet form a connecting path, which is called a multicast root tree. root-tree). The multicast root tree and the multicast subtrees in the subnet together constitute a multi-core distribution tree shared by the entire multicast group.

[0025] Such as figure 2 As shown, it is a flow chart of the multi-co...

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Abstract

The invention relates to a method for building multi-core share multicast tree. Wherein, at initial time, based on cover range of planet, dividing the constellation cover area into virtual planet position at same number of planets; the virtual planet position is one-to-one relative to the planet; the constellation point of planet is at the center of virtual planet position; dividing the planet network formed by virtual planet position into several sub networks; fixing the core node of sub network of each multicast member; building multicast root tree, to connect core nodes; in the sub network of each member, using core node as root, building multicast sub tree, to connect the multicast members of sub network. The invention can balance service flux, to avoid necking problem of single core node in single-core share tree, and it disperses the service of member into several core nodes to reduce the maintenance consumption. The invention also can save network resource.

Description

technical field [0001] The invention relates to satellite communication technology, in particular to a construction method of a multi-core shared multicast tree applied to a low-orbit satellite network. Background technique [0002] In recent years, the emergence of applications such as multimedia communication and collaborative work in distributed environments has prompted the development of a new communication mode - multicast. For example, video conferencing, file publishing, CSCW, distributed interactive simulation, etc., all need multicast to effectively support. [0003] Multicast is different from broadcast and unicast. The information sent through the broadcast mechanism will be received by all nodes within the communication range, although some of them may not need the information; the broadcast itself has no screening and filtering mechanism, and there is relatively no security guarantee, and information with a high security level is not suitable for passing Broa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185
Inventor 张军程连贞刘凯
Owner BEIHANG UNIV