Abstract: Existing dissemination methods merely focus on single optimization objective and fail to ensure reliability and efficiency simultaneously, this makes them be inadaptable to meet the need of disseminating reliably and efficiently in the emergency environment. A reliable dissemination method based on dynamic multicast tree called RDBDMT is proposed. RDBDMT clusters and identify nodes in a hierarchical manner according to the delays between them, and based on which a hierarchical overlay is built. RDBDMT adopts prefix matching routing which is based on a dynamic multicast tree according to their identifications. Theoretical analysis and experimental results show that, RDBDMT is much more reliable and efficient than the existing methods, even in the emergency environment, where a large number of messages are published simultaneously in a very short time.
dynamic multicast tree,