Social-community based DTN routing method

摘要

PURPOSE: A DTN(Delay Tolerant Networking) routing method based on a social community is provided to effectively reduce the times of copying a message and guarantee the entire routing performance. CONSTITUTION: A source node checks contact with another contact node if a transmission message exists in a queue(S101,S103). When the source node contacts the contact node, the source node determines whether to forward a message by comparing destination clusters of the message(S105). The source node controls message copy or forward according to whether to forward the message(S107~S121). [Reference numerals] (AA) Start; (BB) End; (S101) Transmission message exists in a queue?; (S103) Source node contacts a contact node?; (S105) Comparing destination clusters; (S107) Source node, a contact node, and a destination node exist in the same community?; (S109) Copying a transmitted message; (S111) Source node and the contact node exist in different communities?; (S113) Reducing the number of copying and noncopying the transmitted massage?; (S115) Contact node exists in the same community as the destination node?; (S117) Forwarding the transmitted massage; (S119) All the three nodes exist in different communities?; (S121) Determining forwarding according to contact record