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

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...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a wireless ad hoc network multicast routing method based on a dynamic source tree for the poor robustness of the multicast routing protocol based on the source tree structure in the wireless ad hoc network. Establish a backup route to repair the link failure in the source tree in time, so as to ensure that the quality of the service is not affected

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