A Stable Multicast Tree Creation Method for Ad Hoc Network by Considering Stability of Mobile Node

摘要

This invention relates to a reliable multicast tree creation method considering the stability of the mobile node in the ad hoc network environment to, physical position information of each node is sent to the source node of the node reliability judgment step that always maintains the stability measurement information (S10); If the source node broadcasts an information request message, the mobile node receives this are repeatedly transmitting their mobility information and multicast information to the source node, the mobility information for all multicast and mobile nodes in the network topology, Information that is collected in the source node collecting step (S20); By selecting the most reliable of the mobility information of the retrieved nodes, each node determines that it meets the safety threshold value after the irradiation stability of the connection with the multicast group members, multicast, multicast is selected by the logical nodes of the tree tree node selection step (S30); When the source node transmits the information on all the logical nodes to the selected logical nodes, the selected node is a logical exchange of information to the logical nodes adjacent to, and generates a logic Hello message records the past transmission path and transmission, is set transmission by the number of hops and, logically adjacent nodes having received the Hello message logic is configured to acquire a physical path information that is associated with the logical node, the virtual links are connected to the multicast tree generation step (S40); The multicast tree and the multicast tree includes a holding step (S50) for holding the virtual link. Accordingly, the invention is by using a multicast tree construction method using the location information of the mobile node in the ad hoc network system, the reliability for the collection and analysis, because the mobile node provides the multicast service, to provide a reliable, has the effect of generating a reliable multicast tree through the logical connection between the nodes.