Performance evaluation of DTN protocols for vehicular network by variations in buffer size

This paper presents a comparison of Delay Tolerant Network (DTN) routing protocols in a realistic environment. This scenario is created by considering local map for vehicular network. The concept of this research conforms to actual conditions related to the lack of infrastructure or conditions that lead to malfunction of some infrastructure in the network. This simulation is focusses on the use of native routing protocols affected by the buffer size on this limitation. The simulation results of this scenario indicate that the file sizes tend to be not significantly affect to the network. Messages delivered at the same rate on buffer size between 10 MB to 20 MB, while the smaller file size that is around 5 MB message dropped more. However, the improvement of the routing protocol used is necessary to show transmit condition of the infrastructure.