The various applications of Delay Tolerant Networking (DTNs) require a suitable routing protocol for urban environment. In general, the mobile node trajectory is associate with its social relations and regular life in urban areas, and existing DTN routing protocols cannot incorporate in urban environments. This study aims to improve the key targets, such as delivery ratio, latency and network overhead ratio, in urban environments by describing a routing algorithm based on Geographic Grid (GeoGrid). GeoGrid is suitable for a sensory data collection system in which a part of the mobile nodes generate data, and mobile relay nodes transport the data to a fixed sink station. Simulation experiments were carried out to verify the performance of the proposed GeoGrid under an urban scenario, and the results suggest that the GeoGrid outperforms both Epidemic and Prophet routing algorithms in successful delivery ratio, average delivery latency, and network overhead ratio.
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The authors would like to thank the reviewers for their insightful feedback and valuable suggestions. Additionally, this work is supported by Natural Science Foundation of China (No. 61272448), Doctoral Fund of Ministry of Education of China (No. 20110181130007), Science and Technology Supporting Plan of Sichuan (Nos. 2011RZ0004 and 2012GZ0005), Soft Science Found of Science and Technology Department of Sichuan (No. 2014ZR0146).
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Li, WZ., Lin, F., Zhou, JL. et al. DTN Routing with Fixed Stations Based on the Geographic Grid Approach in an Urban Environment. Wireless Pers Commun 82, 2033–2049 (2015). https://doi.org/10.1007/s11277-015-2330-5