  With the raising demand for autonomous driving, vehicle-to-vehicle
communications becomes a key technology enabler for the future intelligent
transportation system. Based on our current knowledge field, there is limited
network simulator that can support end-to-end performance evaluation for LTE-V
based vehicle-to-vehicle platooning systems. To address this problem, we start
with an integrated platform that combines traffic generator and network
simulator together, and build the V2V transmission capability according to
LTE-V specification. On top of that, we simulate the end-to-end throughput and
delay profiles in different layers to compare different configurations of
platooning systems. Through numerical experiments, we show that the LTE-V
system is unable to support the highest degree of automation under shadowing
effects in the vehicle platooning scenarios, which requires ultra-reliable
low-latency communication enhancement in 5G networks. Meanwhile, the throughput
and delay performance for vehicle platooning changes dramatically in PDCP
layers, where we believe further improvements are necessary.
