Autonomous Vehicle Engineering - September 2021 - 23

Connected Vehicle
Mobile-phone technologies are among the many consumer
standards that will see more usage in vehicles.
" CAN has a long legacy and has proven itself for over
two decades inside of vehicles, " said Daniel Hopf, system
architect at Continental. " For lower-speed applications,
CAN will remain the technology of choice mostly due to
its cost advantage. Furthermore, CAN is very well known
at OEMs and suppliers and is a 'safe bet' when designing
new systems. With the upcoming 10BASE-T1S automotive
Ethernet specification for 10 Mbit/s operation
over a shared medium, competition with the upcoming
CAN-XL standard will grow, since they will end up in a
similar speed- and maybe even cost-range. "
Long-term scalability and openness are major
requirements for the many networking architectures
being deployed today and into the future. Autonomy
requires extensive communications that must meet
tight real-time requirements. The addition of electrified
powertrains is another factor that requires a
holistic approach to intersystem communications.
The Ethernet standard includes a well-planned
pathway towards higher speeds while also maintaining
compatibility make it a safe choice for longterm
planning. The IEEE, which manages the technology,
has added an automotive committee that will
manage any changes needed to meet automakers'
requirements.
" The automotive Ethernet standards now are also
created within the same group, IEEE 802.3, with the
OPEN Alliance creating all sets of supplementary specifications
for successful operation under automotive
conditions., " Hopf said
Understanding wiring for this range of networking
schemes isn't the only challenge facing communication
specialists. Many engineers also will have to add wireless
networking to their skillset. Over-the-air updating
is expected to soar as software and security become
more important elements in connected vehicles; Wi-Fi
is another home/business technology that is expected to
dominate, again due in part to its integration in semiconductors
and design tools.
" Wi-Fi connectivity is often utilized to enable
over-the-air updates and is especially important as
we move into the next generation of software-defined
vehicles where data will be flowing to and from
the vehicle to ultimately increase safety and enable
refreshing of HD maps, " Shapiro said. " It will also
enable new entertainment options in an autonomous
vehicle, such as streaming movies, shows, games and
music so that occupants can enjoy the hands-free ride,
although most of these services will be enabled by 5G
cellular technology. " ■
AUTONOMOUS VEHICLE ENGINEERING
September 2021 23
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Autonomous Vehicle Engineering - September 2021

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