  The internet-of-things (IoT) environment connects different intelligent
devices together and enables seamless data communication between the connected
devices. Connected vehicles (CVs) are one of the primary example of the IoT,
and the efficient, reliable, and safe operation of CVs demands a reliable
wireless communication system, which can ensure high throughput and low
communication latency. The 5G millimeter wave (5G mmWave) wireless
communication network offers such benefits, which can be the enabler of CV
applications, especially for dense urban areas with high number of CVs. In this
study, we present a simulation-based evaluation framework of end-to-end 5G
mmWave communication for CV applications. In addition, we compare the 5G mmWave
with the Dedicated Short Range Communication (DSRC) technology for a CV
application. The simulation framework is developed using two simulators, a
network simulator and a traffic simulator. In order to develop the framework in
this study, we have used Network Simulator 3 (ns-3) and SUMO, an open-source
microscopic roadway traffic simulator. We have used end-to-end latency, packet
loss and throughput as the performance evaluation metrics. We have found that
for dense urban areas, 5G mmWave can achieve higher throughput, lower latency
and lower data loss compared to DSRC. 5G mmWave can support CV applications
with high throughput requirement on the downlink data flow. Through further
investigation, we have found that the performance of 5G mmWave is significantly
impacted by the penetration level of CVs, maximum CV speed, and CV application
requirements.
