[ipwave] what is C-V2X: PC5 mode 4 'sidelink' without infrastructure, or V2I?

[Alexandre Petrescu <[e-mail]>]

A few definitions of C-V2X circulate:

C-V2X is LTE PC5 interface mode 4 'sidelink': it means it works only in 
a V2V or V2P manner, and thus C-V2X does not need infrastructure. This 
has been said a few times.

C-V2X means also V2I. This is said by e.g. the SIM8100 module 
description saying "The SIM8100 is a C-V2X module which supports C-V2X 
functionality through a PC5 interface for vehicle-to-vehicle (V2V), 
vehicle-to-pedestrian (V2P), and vehicle-toinfrastructure (V2I) 
applications" at https://www.simcom.com/product/SIM8100.html or "The 
module will most commonly be found in telematics boxes, telematics 
control units, advanced driver-assistance systems, C-V2X (V2V, _V2I_, 
V2P) systems)" at https://www.quectel.com/product/5g-c-v2x-ag55xq-series

What do you think?  Does C-V2X need infrastructure or can C-V2X work 
without infrastructure?

This is can guide our activity of IPv6 for C-V2X.

Alex