Interested-based Information Dissemination in Delay Tolerant Networks

• Main Authors: Chun-Chieh Tsai, 蔡浚杰
• Other Authors: Shou-Chih Lo
• Format: Others
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/55210630807736468905

碩士 === 國立東華大學 === 資訊工程學系 === 101 === A Delay Tolerant Network (DTN) is a special network routing environment under which the traditional communication model does not work anymore. The traditional TCP/IP protocol suit cannot be applied too and a specific protocol to this networking environment is needed. The DTN routing usually uses the store-carry-and-forward method in data transfer. If the connection is interrupted, data will be stored in the buffer until a connection is established with other suitable nodes. The routing design is challenging since there are many variable factors in such environment. The publish and subscribe system uses brokers to transfer interesting messages. This approach cannot be applied to the DTN, since the brokers may exhaust resources due to lot of message forwarding. Therefore, this thesis proposes a strategy to disseminate messages according to the user’s interests. The proposed method is based on a quota-based routing that can adaptively control the number of replicated messages to fit the network performance and does not affect the delivery rate because of different group sizes. Finally, our results show that the proposed method produces favorable message transfer performance in a variety of group sizes.