
Wireless vehicle-to-vehicle communication would be required in new cars - serg_chernata
http://www.theverge.com/2016/12/13/13936342/wireless-vehicle-to-vehicle-communication-v2v-v2i-dot-nhtsa
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blendo
From the fact sheet
[https://www.safercar.gov/v2v/pdf/V2V_NPRM_Fact_Sheet_121316_...](https://www.safercar.gov/v2v/pdf/V2V_NPRM_Fact_Sheet_121316_v1.pdf):

What data is exchanged? The data, known as the “basic safety message” (BSM),
is exchanged between vehicles and contains vehicle dynamics information such
as heading, speed, and location. The BSM is updated and broadcast up to 10
times per second to surrounding vehicles. The information is received by other
vehicles equipped with V2V devices and processed to determine collision
threats. Based on that information, if required, a warning could be issued to
drivers to take appropriate action to avoid an imminent crash.

Will drivers’ privacy be at riskw hen V2V is deployed? By design, the V2V
system will not collect, broadcast, or share information linked or linkable,
as a practical matter, to individuals or their vehicles. V2V-enabled vehicles
exchange only generic safety information. The system is designed to operate
without using any personal information about specific vehicles or drivers.

The details are at:
[http://www.safercar.gov/v2v/pdf/V2V%20NPRM_Web_Version.pdf](http://www.safercar.gov/v2v/pdf/V2V%20NPRM_Web_Version.pdf)
See particularly "Proposed V2V Basic Safety Message (BSM) Content". This
includes a 32-bit random id, transmitting 10 messages per second, to include
time, lat/lng/elevation, speed, heading, acceleration, and yaw (yaw being the
rate at which the vehicle’s direction is changing (i.e., the rate at which the
vehicle’s face is pivoting towards the left or the right).

Range will be about 300 meters.

And this goody: A PER of less than 10% aligns with the ASTM standard E2213-03
(2003) 4.1.1.2 where “(2) DSRC devices must be capable of transferring
messages to and from vehicles at speeds of 85 mph with a Packet Error Rate
(PER) of less than 10 % for PSDU lengths of 1000 bytes and to and from
vehicles at speeds of 120 mph with a PER of less than 10 % for PSDU lengths of
64 bytes.”

I expect real benefits when traffic lights could also transmit messages such
as "Hey you people coming from the North and Sound, I'm going to turn red in
10 seconds."

And as an urban pedestrian, I want a portable unit. Sorry, Tesla owners, your
"Ludicrous" mode may be periodically downgraded to "Meek and Mild" mode.

