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題名 A location-based content search approach in hybrid Delay Tolerant Networks 作者 蔡子傑
Tsai,Tzu-Chieh
Lee,Hsin-Ti貢獻者 資科系 日期 2013 上傳時間 2-Sep-2014 17:19:28 (UTC+8) 摘要 In Delay Tolerant Networks (DTNs), the offline users can, through the encountering nodes, use the specific peer-to-peer message routing approach to deliver messages to the destination. Thus, it solves the problem that users have the demands to deliver messages while they are temporarily not able to connect to Internet. Therefore, by the characteristics of DTNs, people who are not online can still query some location based information, with the help of users using the same service in the nearby area. In this paper, we proposed a Location-based content search approach. Based on the concept of three-tier area and hybrid node types, we presented four strategies to solve the query problem, namely, Data Replication, Query Replication, Data Reply, and Data synchronization strategies. Especially we proposed a Message Queue Selection algorithm for message transferring. The priority concept is set associated with every message such that the most “important” one could be sent first. In this way, it can increase the query success ratio and reduce the query delay time. Finally, we evaluated our approach, and compared with other routing schemes. The simulation results showed that our proposed approach had better query efficiency and shorter delay. 關聯 Journalism and Mass Communication,12(3),28-33 資料類型 article DOI http://dx.doi.org/10.1109/ChinaCom.2013.6694560 dc.contributor 資科系 en_US dc.creator (作者) 蔡子傑 zh_TW dc.creator (作者) Tsai,Tzu-Chieh en_US dc.creator (作者) Lee,Hsin-Ti en_US dc.date (日期) 2013 en_US dc.date.accessioned 2-Sep-2014 17:19:28 (UTC+8) - dc.date.available 2-Sep-2014 17:19:28 (UTC+8) - dc.date.issued (上傳時間) 2-Sep-2014 17:19:28 (UTC+8) - dc.identifier.uri (URI) http://nccur.lib.nccu.edu.tw/handle/140.119/69581 - dc.description.abstract (摘要) In Delay Tolerant Networks (DTNs), the offline users can, through the encountering nodes, use the specific peer-to-peer message routing approach to deliver messages to the destination. Thus, it solves the problem that users have the demands to deliver messages while they are temporarily not able to connect to Internet. Therefore, by the characteristics of DTNs, people who are not online can still query some location based information, with the help of users using the same service in the nearby area. In this paper, we proposed a Location-based content search approach. Based on the concept of three-tier area and hybrid node types, we presented four strategies to solve the query problem, namely, Data Replication, Query Replication, Data Reply, and Data synchronization strategies. Especially we proposed a Message Queue Selection algorithm for message transferring. The priority concept is set associated with every message such that the most “important” one could be sent first. In this way, it can increase the query success ratio and reduce the query delay time. Finally, we evaluated our approach, and compared with other routing schemes. The simulation results showed that our proposed approach had better query efficiency and shorter delay. en_US dc.format.extent 281 bytes - dc.format.mimetype text/html - dc.language.iso en_US - dc.relation (關聯) Journalism and Mass Communication,12(3),28-33 en_US dc.title (題名) A location-based content search approach in hybrid Delay Tolerant Networks en_US dc.type (資料類型) article en dc.identifier.doi (DOI) 10.1109/ChinaCom.2013.6694560 en_US dc.doi.uri (DOI) http://dx.doi.org/10.1109/ChinaCom.2013.6694560 en_US
