Study of VDTN routing protocols performances in sparse and dense traffic in the presence of relay nodes
Maria Benamar, Sara Ahnana, Fatima Zahrae Saiyari, Nabil Benamar, Driss El Ouadghiri, Jean‐Marie Bonnin · Journal of Multimedia · 2014
Vehicular Delay Tolerant Networks (VDTN) are growing challenging field of Delay Tolerant Networks (DTN) containing mobile nodes (vehicles) that communicate using the paradigm of store carry and forward. In this model, nodes store the bundle waiting for the opportunity to transfer it to another node in the same transmission range, and in a limited duration. VDTN enables communications in a sparse network characterized by low density, high mobility of nodes, intermittent connectivity, no end-to-end communication and no information on the path of nodes, which make routing in such cases difficult and challenging. This paper studies the performances of some well-known VDTN routing protocols in sparse and dense traffic. The proposed scenario considers stationary nodes representing sensors measuring different types of data to be transferred to stationary destination nodes through the VDTN network (vehicles). The destination nodes are the only part of the network that is connected to the Internet. The transmission of collected data is also made by fixed nodes representing stationary relays such as audio-signal traffic lights, placed in the crossroads of Rennes city streets. The map of Rennes has been used and the position of the stoplights has been carried out using Open Data. The aim of our simulation is to study the impact of mobile nodes and stationary relays on the routing protocols performances in dense and sparse traffic.