Evaluating Interest Broadcast in Vehicular Named Data Networking

Vehicular Ad-hoc Networks (VANETs) are expected to provide assistance to various applications, such as accident notification and emergency announcement. Named Data Networking (NDN) has been recognized as a more suitable architecture than TCP/IP for application in VANETs due to its ability to handle high mobility and intermittent connectivity. The Vehicular NDN (V-NDN) has further made special architectural modifications for VANETs. However, V-NDN can be challenged in its extensive use of broadcast in dense network situations. For example, broadcasting of interest packets could lead to more collisions. In this study, we explore the broadcast performance of V-NDN using the ORBIT testbed. Our experimental results show that VNDN suffers an increased loss ratio in dense network scenarios because of Wifi broadcast collision, and it is important to find a suitable range of values to be distributed by the collision avoidance timer before transmission.