Application of Contact Graph Routing in Satellite Delay Tolerant Networks |
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Authors: | ZHU Laitao LI Yong ZHANG Junxiang WU Jing TAI Xiao ZHOU Jianguo |
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Institution: | 1.School of Electronic Information, Wuhan University, Wuhan 4300722.Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory, Shijiazhuang 050081 |
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Abstract: | Satellite networks have many inherent advantages over terrestrial networks and have become an important part of the global network infrastructure.Routing aimed at satellite networks has become a hot and challenging research topic.Satellite networks,which are special kind of Delay Tolerant Networks(DTN),can also adopt the routing solutions of DTN.Among the many routing proposals,Contact Graph Routing(CGR) is an excellent candidate,since it is designed particularly for use in highly deterministic space networks.The applicability of CGR in satellite networks is evaluated by utilizing the space oriented DTN gateway model based on OPNET(Optimized Network Engineering Tool).Link failures are solved with neighbor discovery mechanism and route recomputation.Earth observation scenario is used in the simulations to investigate CGR's performance.The results show that the CGR performances are better in terms of effectively utilizing satellite networks resources to calculate continuous route path and alternative route can be successfully calculated under link failures by utilizing fault tolerance scheme. |
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Keywords: | Satellite Delay Tolerant Networks (DTN) Space oriented DTN gateway Contact Graph Routing (CGR) Link failures |
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