Comparison of routing policies based on network coding in delay tolerant network
Yajuan Li, Xiangyu Bai · 2017
Delay Tolerant Network (DTN) is widely applied to the situation that difficult to deploy infrastructure. It has the characteristics of nodes distributed sparsely, connect unstably, large delay and high bit error rate. These characteristics of DTN, lead to the data efficient transmission encountered a certain challenge. Network coding is proposed to improve network throughput, balance network load and improve network bandwidth utilization. The key idea is that nodes in the network not only participate in message forwarding, but also take part in data encoding processing. It introduced the idea of network coding into the DTN routing strategy greatly enhance the success rate of packet delivery and network delay performance, make up for the high delay, high bit error rate in DTN and so on. This paper summarizes the routing strategies based on network coding in DTN environment, and qualitatively compares those routing strategies. The future research direction is pointed out through the comparative analysis of the existing research.