Efficient Data Dissemination in Vehicular Ad Hoc Networks
Data services for in-vehicle consumption are expected to become a primary driver in the development of future vehicular networks. Due to download rate limitations of present wide-area cellular connectivity such as 3G (the likely 'Pipe' to/from vehicles for long range connectivity), direct peer-to-peer data sharing among vehicles can supplement vertical downloading with horizontal dissemination. This paper studies the inter-vehicle data dissemination problem based on a WAVE/802.11p vehicular ad hoc network, using network coding. The authors first derive the Probability Mass Functions (PMFs) of dissemination completion time in a prototypical three-node case for both random broadcast and with network coding, to quantify the benefits of the latter.