Evaluating interest/data propagation in vehicular named data networks

Abstract

Named Data Networking (NDN) uses data names to communicate contents in a network rather than node addresses. This paradigm shift from a host-centric to data-centric creates new challenges to efficiently exchange data between data consumer and provider. A consumer node generates an Interest message for the desired content and each intermediate node forwards and keeps information about that Interest message. A node that has matching content, responds with the Data message. The Data message is forwarded through all the intermediate nodes that kept the state of Interest message as pending. In this paper, we distinctively investigate the application of NDN forwarding daemon in Vehicular Ad-hoc Networks (VANETs). The results show that there is an uncertain Interest satisfaction delay when content provider is far from the requesting consumer node. We also observed that the Interest and Data packets may not follow the shortest path and there are unnecessary copies of both the messages that are processed within the network. Therefore, pending interest information cannot be kept for a fixed duration and require efficient Interest-Data forwarding mechanism.