  Internet of Vehicles (IoV) is a cornerstone building block of smart cities to
provide better traffic safety and mobile infotainment. Recently, improved
efficiency in WLAN-based dense scenarios has become widespread through Wi-Fi 6,
a license-free spectrum technology that can complement the cellular-based
infrastructure for IoV. In addition, Named Data Networking (NDN) is a promising
Internet architecture to accomplish content distribution in dynamic IoV
scenarios. However, NDN deployments, i.e., native (clean-slate) and overlay
(running on top of IP stack), require further investigation of their
performance over wireless networks, particularly regarding the IoV scenario.
This paper performs a comparative simulation-based study of these NDN
deployments over Wi-Fi 6 for IoV using real vehicular traces. To the best of
our knowledge, this is the first effort that extends ndnSIM 2 with an
overlay-based NDN implementation and that compares it with the native approach.
Results show that the overlay-based NDN consistently outperforms the native
one, reaching around 99% of requests satisfied, against only 42.35% in the best
case of native deployment.
