DTN gateway design and semi-physical simulation based on OPNET

Delay Tolerant Network (DTN) is an approach applied to computer network architecture to address the technical issues in heterogeneous networks that may lack continuous network connectivity. Examples of these networks are those operating in the mobile or extreme terrestrial environments, or planned networks in space. In this paper, we optimize the implementation of DTN gateway and tested with the Video-On-Demand service (VLC). The whole process is in the semi-physical simulation scenario that we built based on OPNET. Our test results show that the DTN gateway has a good adaptability for the real data stream.