Investigation of Message Suppression Method Considering TCP in Vehicular-DTN

The Delay/Disruption Tolerant Networking (DTN) aims to provide inter-operable communications with wide range of networks which have poor performance characteristics. In previous work, we proposed a message suppression method for Vehicular-DTN (VDTN) considering UDP traffic. In this paper, we evaluate the proposed method for VDTN considering TCP traffic. The simulations for two scenarios are conducted considering obstacles (buildings), where Message Suppression with Road side units (MSRs) are present or not present. We consider 802.11p standard and send bundle messages in urban scenario. We use the packet delivery ratio, duplicated bundle received and end-to-end delay as evaluation metrics. We can found that our proposed method can reduce the duplicated bundle messages, even if vehicles send a bundle message using TCP to other vehicles. Also, our proposed method have a good performance compared with Epidemic conventional method for all cases.