V2I and V2V Communications



Provide DSRC (Dedicated Short Range Communications) in each car to allow communication between cars and equipment such as lights for improved/safer full self-driving abilities.


DSRC is a two-way short to medium-range wireless communications capability that permits very high data transmission critical in communications-based active safety applications. In Report and Order FCC-03-324, the Federal Communications Commission (FCC) allocated 75 MHz of spectrum in the 5.9 GHz band for use by Intelligent Transportations Systems (ITS) vehicle safety and mobility applications.

DSRC based communications is a major research priority of the Joint Program Office (ITS JPO) at the U.S. Department of Transportation (U.S. DOT) Research and Innovative Technology Administration (RITA). The cross-modal program is conducting research using DSRC and other wireless communications technologies to ensure safe, interoperable connectivity to help prevent vehicular crashes of all types and to enhance mobility and environmental benefits across all transportation system modes.

The U.S. DOT’s commitment to DSRC for active safety communications contributes to safer driving. Vehicle safety applications that use vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications need secure, wireless interface dependability in extreme weather conditions, and short time delays; all of which are facilitated by DSRC.

Some cars (Cadillac, Volvo, Mercedes) are starting to support this standard. When so equipped, a car will know how many seconds an upcoming light will still be green; when there are oncoming vehicles that also support the standard, where they are coming from and what speed; and many other applications. See the DOT writeup here.

Moderator: Estimated cost per vehicle is estimated at about $150, with lower costs as volumes increase. This does not include the engineering or software development costs by the manufacturer. It should also be pointed out that almost no fixed equipment is in place (i.e. signals equipped with DSRC) and it is unclear who would pay for the necessary upgrades. More here.



lightly edited by moderator
Category: CY3XS Applies to:
     Created 1-Oct-2017


Maybe use existing cellular or WiFi to let user installed apps to participate in cloud services the way nav systems now operate.

I’m not a big fan of adding new channels and special services, especially *required* services. I prefer open sourced, publically available, voluntary services with competing providers.
    Created 2-Dec-2018
Regarding the comment from the moderator ("It should also be pointed out that almost no fixed equipment is in place (i.e. signals equipped with DSRC) and it is unclear who would pay for the necessary upgrades") - Fixed equipment is being installed now (or will be in 2018) in Columbus, OH; Tampa, FL; New York City; Tuscaloosa, AL; and along most of the interstate highways of Wyoming. Funding for such installations is generally provided by the US DOT and/or state DOTs.  Moreover, this is the system of the future, so vehicles claiming to be state of the art (Tesla certainly aspires to this) need to have it (especially since the hardware is starting to become available in competitive luxury vehicles). The link provided in the moderator comment is from 2012, and there have been a lot of developments in this area in the intervening 5 years.
    Created 1-Jan-2018
Absolutely agree this should be on the short list for development.  I work in telecom regulatory compliance for latin american countries (www.larcg.com) and we see 5.9 GHz available in many countries, although testing of the radio module might be required.
We obtained the regulatory approval in Mexico for the 315 MHz Tesla key fob in 2015, with homologation renewals in 2016 and 2017.

If we get any advanced word of Tesla developing a 5.9 GHz DSRC module for integration into the cars, I'll post something on the forums.
    Created 2-Oct-2017