Evaluation and Synthesis of Connected Vehicle Communication Technologies (2021) / Chapter Skim
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Page 1 NCHRP Project 23‐10, "Evaluation and Synthesis of Connected Vehicle Communications Technologies" Summary This report contains a compilation of several white papers and other deliverables submitted under NCHRP Project 23‐10, "Evaluation and Synthesis of Connected Vehicle Communication Technologies." The project recognizes that Connected Vehicle (CV) technologies enable all types of vehicles, roadways, and mobile devices to communicate and share vital transportation information. The mediums that enable this communication are collectively known as vehicle‐to‐everything (V2X)
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Page 2 operational activities, and a framework for moving forward despite the ongoing regulatory and technological uncertainty. 3. A set of presentation slides and a recorded narration, that provides a high‐level summary of the 5.9 GHz proposed rulemaking and summary of implications to IOOs. This presentation intends to give an overview of the regulatory and technical environment to support the policy needs of state DOT executives with varying levels of engagement and awareness of V2X.
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Page 3 Agencies with RSUs that are currently operating DSRC only on Ch 180 will potentially have 2‐3 years under the current FCC timeline, but can also begin charting a course to switch over to currently available long term evolution (LTE) C‐V2X sooner. However, device vendors may opt to scale‐back support for DSRC devices sooner than desired, which may have the unintended consequence of accelerating FCC timelines.
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Page 4 Paper #1 developed under NCHRP 23‐10, rely on past tests that have shown potential issues with out‐of‐ band interference. While additional research will be necessary to immediately determine the impacts of interference on both DSRC and LTE C‐V2X, a higher‐level review of applications that might remain possible under this reduced scenario will also present an opportunity. How many message sets can be exchanged in limited channel arrangements? What tolerance to interference might these messages have, and will this potentially eliminate broad safety‐related applications from consideration (noting that targeted safety applications might still be feasible on a smaller scale)
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Page 5 Further Notice of Proposed Rulemaking As suggested above, IOO response and input to the FNPRM will play a role in the future of V2X. The FNPRM will address several issues not covered in the First Report & Order (R&O) . Specifically, they are seeking comments and feedback on: 1.
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