Delay Tolerant Networks (DTNs) are occasionally-connected networks. They have high latency, long queuing time, limited resources and intermittent connectivity, which are different from traditional networks. Message Ferry (MF) scheme provides efficient data delivery for DTNs. In the MF scheme, nodes move proactively to send and receive messages. In this paper, we propose a ferry routing scheme for DTNs called Multi-Constraint Ferry Routing (MCFR). By making full use of the traffic between nodes, our routing scheme can improve network performance. Simulation results show that our proposal is better than the MFR in network performance because the MCFR has a higher delivery ratio and a lower end-to-end delay.
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