Wireless Ad Hoc network multicast routing method based on dynamic source tree

A wireless self-organization and routing technology, applied in star/tree network, wireless communication, data exchange network, etc., can solve the problem of poor robustness of multicast routing protocol

A wireless self-organization and routing technology, applied in star/tree network, wireless communication, data exchange network, etc., can solve the problem of poor robustness of multicast routing protocol

CN101478801BInactive Publication Date: 2011-03-16SOUTH CHINA UNIV OF TECH
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  • Wireless Ad Hoc network multicast routing method based on dynamic source tree
  • Wireless Ad Hoc network multicast routing method based on dynamic source tree
  • Wireless Ad Hoc network multicast routing method based on dynamic source tree

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Embodiment Construction

[0073] A wireless self-organizing network multicast routing method based on a dynamic source tree provided by the present invention uses some of the following control messages, which are listed as follows:

[0074] MRREQ: Multicast routing request message, which is broadcast by the source node in the multicast group to the network to initiate the process of establishing a multicast source tree.

[0075] MRREP: Multicast routing reply message, which is sent to the source node along the reverse path of the MRREQ by the receiving node in the multicast group after receiving the MRREQ.

[0076] MSTC: Multicast source tree establishment message. After the source node calculates an optimal multicast tree, it is sent to the multicast receiver node along the multicast tree to establish a multicast source tree. The format is as follows figure 1 shown.

[0077] SBRN: Source tree backup route advertisement message, which is broadcast by the backup node to its neighbor nodes to advertise ba...

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Abstract

The invention discloses a dynamic source tree-based ad hoc wireless network multicast routing method which comprises a tree building process of the multicast source, a building process of the source tree standby routing, a dynamic maintenance process of the source tree, a process of node joining the source tree and the process of node leaving the source tree. The standby routing is built for the source tree on the basis of building the multicast source tree, and when link failure or node failure of the source tree happens, the standby routing can be used for timely repairing the source tree, so when link failure or node failure of the source tree happens, the rebuilding of the source tree does not increase business delay, thereby ensuring the business quality. The building of the standby routing can change following the dynamic change of the source tree but is limited within the range of one hop around the source tree all the time, and the purpose of effectively controlling processingcost is realized by limiting the range of nodes participating in the standby routing. The multicast routing method of the invention is not only high in transmission efficiency but also good in robustness.

Description

technical field [0001] The invention belongs to the technical field of wireless communication networks, and in particular relates to a wireless self-organizing network multicast routing method based on a dynamic source tree. Background technique [0002] A wireless ad hoc network, also known as a wireless Ad Hoc network (Wireless Ad hoc Networks), is a multi-hop wireless network composed of multiple mobile nodes. The wireless self-organizing network does not depend on any specific network infrastructure. It has the characteristics of no center, self-organization, self-healing, flexible and low-cost networking, wide coverage, and movable nodes. It can realize rapid automatic networking and can be widely used. It is of great practical significance to be used in battlefield communication command and control, disaster relief, temporary meetings, etc. where wired network support cannot be obtained, or in some environments where communication is only needed temporarily but the cos...

Claims

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Application Information

Patent Timeline
16 Mar 2011
Publication
CN101478801B
IPC
H04W40/00; H04W88/18; H04L12/44; H04L12/56; H04L12/18; H04L45/16
Inventors
刘桂开; 韦岗