Abstract
In Delay/Disruption Tolerant Networks (DTNs), most previous works proposed to re-forward data and recalculate the route between the local node and one of its neighbors depending on the priority of message. However, some lower priority messages in a contact are replaced by the higher priority messages, which leads to the lower throughput and higher data loss rate. In this paper, we focus on the route selection process with the consideration of network coding in Low Earth Orbit (LEO) satellite DTN communications, and propose an improved Contact Graph Routing (CGR) scheme by introducing the Destination based Network Coding (DNC), namely DNC-CGR, to improve the network throughput and reduce the number of messages in the Inter-Satellite Links (ISLs). Simulation results show that the proposed DNC-CGR scheme can significantly improve network performance in comparison to the existing CGR schemes.
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