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Federal Register / Vol. 86, No. 83 / Monday, May 3, 2021 / Rules and Regulations many commenters, that continuing to reserve the entire 5.9 GHz band for possible additional services by ITS
licensees would not be the most efficient or effective use of the band, nor was it in the best public interest to do so. The Commission agreed with commenters assertions that the original concept for DSRC use of the band had not come to fruition, and changes to the 20+ year old band plan were essential to maximizing the use of this spectrum for the publics greatest well-being, particularly Americans in rural areas that lack adequate broadband access.
8. 30 megahertz for ITS. The Commission determined to retain 30
megahertz of spectrum for ITS services based on the following factors: 1 The failure of the 5.9 GHz band to be used ubiquitously for the broad range of ITS
applications that were originally anticipated; 2 the strong public interest benefits that would accrue by allowing unlicensed use in 45
megahertz of the 5.9 GHz band; and 3
the need for dedicated 5.9 GHz spectrum to support core vehicular safety applications. Although ITS
proponents preferred that the Commission continue to allocate the entire 75 megahertz of the 5.9 GHz band for ITS, the Commission agreed with the commenters contending that 30
megahertz of spectrum is the appropriate amount of spectrum for ITS
in the band. Based on the record, the Commission found that 30 megahertz would support the provision of the core vehicle-safety related ITS functions foreseen when the Commission originally provided for ITS services in the band, including for vehicle-tovehicle V2V basic safety applications such as basic safety messages, for personal safety message applications, and for vehicle-to-infrastructure V2I
applications.
9. The record demonstrated that with 30 megahertz, incumbent licensees would be able to provide on a widescale basis the same types of ITS services that, up until now, have been developed and deployed on a limited basis, and would preserve ITS licensees ability to expand their existing safety-related services to millions more vehicles. The Commission found that 30 megahertz also would be sufficient for the basic safety applications of the next generation of ITSCV2X; it agreed with assertions in the record that with this 30 megahertz of spectrum made available for CV2X-based ITS, automakers, technology providers, and service providers would be able to effectively use the spectrum for vehicle safety-related applications.
Furthermore, the Commission decided
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that ITS services in the 5.9 GHz band should not duplicate information e.g., important roadway information that is already readily available via other sources, such as commercial cellular services, nor should excess 5.9 GHz spectrum continue to be reserved for applications that can be or have already been provided using other spectrum bands or alternative technology.
10. The Commission was not persuaded that more than 30 megahertz is needed for potential new applications that extend beyond the types of safetyrelated services currently being offered by DSRC licensees pursuant to the Commissions rules, especially given that the 75 megahertz in the 5.9 GHz band has been underused for many years. DSRC service has not been widely deployed, potential future advanced applications are still under development and have not been deployed, and widespread commercial deployment would at best still be years away, if it occurs at all. The Commission found that the quickest, most efficient way to realize its goals of greater spectrum efficiency was to divide the band into two separate spectrum segments rather than subjecting the band to additional testing to determine appropriate sharing techniques. Furthermore, the Commission found that preserving 30
megahertz for ITS use in the 5.9 GHz band would comport with the use many other countries have designated for this band and allow global harmonization. It found that each jurisdiction appears to have made an individual policy choice that it has determined to be most appropriate for its circumstances, and that there are potential harmonization benefits in retaining some dedicated spectrum for ITS in this frequency range, particularly in the upper 20
megahertz. The Commission concluded that its plan to introduce CV2X in the band, in conjunction with other administrations support for such use within the 5.9 GHz band, should facilitate economies of scale in the production and deployment of equipment and, ultimately, provision of the core safety functions originally contemplated for the band.
11. The Commission disagreed with ITS proponents who insisted that the entire band be preserved for future ITS
developments that could make use of the entire 75 megahertz in the 5.9 GHz band and that argued that more than 30
megahertz should be reserved to accommodate future advanced ITS
safety-related services that are under development. Given the significant advances that have been made in automotive connectivity using a variety of means in different spectrum bands
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outside of 5.9 GHz, an ever-greater portion of the overall valuable spectrum resource is being used to support automotive-related functions, including those related to safety. Viewed from this perspective, the Commission was not persuaded by arguments that the entire 5.9 GHz band is needed for ITS in order to ensure that possible future developments can be accommodated, even if it is possible that such future developments could potentially provide some additional safety benefits. In summary, the Commission concluded that although it is possible that ITS
might ultimately make use of the entire 75 megahertz if it continued to be set aside for ITS, such a decision would not optimize use of this valuable spectrum, and the credibility of such arguments was lacking given that these same arguments have been advanced by ITS
proponents for years with no discernable change in the marketplace.
The Commission believed that the ITS
messaging system must work to prioritize and deliver messages more efficiently in the 30 megahertz that will be available for ITS, such as by adjusting message timing to provide multiple types of messages on a single channel to provide the same level of safety to vehicles as can be done on the existing spectrum. Finally, the Commission concluded that targeting the upper 30 megahertz for ITS use and transitioning that spectrum to CV2X
over time will enable the United States to lead in the wireless sector as it has in others, since it was not aware of any widespread ITS deployments that use the full 75 megahertz that proponents say is needed to maintain U.S.
leadership, and it appears the United States is not the only country where the long-time promises of ITS have failed to bear fruit.
12. Transitioning ITS out of the 5.8505.895 GHz Portion of the 5.9 GHz Band. The Commission adopted rules providing up to one year from the effective date of the First Report and Order for ITS services to cease operating in the 5.8505.895 GHz band. Based on the record, the Commission decided that this is a sufficient and reasonable amount of time for ITS licensees to take the necessary steps to transition from the lower 45 megahertz of spectrum and to engage in the same types of operations in the upper 30 megahertz that they were conducting in the band, since there have only been limited ITS
deployments with relatively few installed transmitters. The Commission concluded that because the majority of the installed base was being used in trials for roadside units RSUs at
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