SkyHighTech
Uploaded on Nov 10, 2021
As we know, there has been much talk surrounding the need for V2X communication. We have seen many companies such as Bosch and Qualcomm try to provide solutions such as DSRC (Dedicated short range communications), which is quickly becoming a de-facto standard in the automotive field. However, car manufactures and semiconductor companies alike are pushing for another solution called C-V2X that promises better performance in all conditions than either C-V2V or DSRC. Whilst this technology focuses mainly on cellular phones and their wireless networks, it does help automotive market in some aspects too so it's important to understand the basics behind both these technologies especially when they compete head-to-head with each other .
C-V2X VS DSRC
c-V2X vs DSRC
c-V2X is a new vehicle to vehicle technology
that has recently been proposed as an
alternative to DSRC. The main advantage of
c-V2X is its ability to use LTE, which is
already present in the vast majority of cars.
DSRC stands for Dedicated Short Range
Communication and was developed by the US
Department of Transportation's Intelligent
Transportation Systems (ITS) program. It is similar to c-
V2X except it only works on the 5.9 GHz band, unlike c-
V2X that can work on any car's cellular data connection
(more specifically LTE).
Current road infrastructure includes DSRC
beacons, but this technology will likely
transition to an updated version called
UDS instead of updating all the beacons.
What is UDS?
It stands for Ultra-Wideband, which uses a band
that is much wider than DSRC's 5.9 GHz - 100 MHz
vs 27 MHz . This leads to less power being
required from devices and thus more
range/reliability.
More about c-V2X vs DSRC
As great as c-V2X sounds on paper, it still
has issues including a lack of common
communication protocols between
manufacturers and a longer time needed
to gain interest from car makers.
For example, Google's prototype
vehicle does not have DSRC or
cellular data so they can't support
either technology at this stage.
The main difference between the two
technologies is their goal. c-V2X wants to
add communication abilities to cars while
DSRC is being used for traffic management.
With the recent industry push towards
autonomous vehicles, car manufacturers are
likely to want c-V2X. This means that DSRC
will most likely not be implemented in new
cars any time soon - if ever.
At this point it is hard to say which
technology will win out. Both have their
pros and cons that would need further
analysis before determining a winner.
More importantly, both technologies could
coexist since they are using different bands
and protocols. Before c-V2X can beat out
DSRC, it needs to prove itself in tests such as
Interplanetary Super Highway (and stop losing
to WiFi!).
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