Update on FCC 5.9GHz band rulemaking intending

by Lionel Casey

On May 14, 2019, Federal Communications Commission (FCC) Chairman Ajit Pai introduced plans to open a rule-making to take a “clean appearance” at the 5850-5925 megahertz (MHz) (5.9 gigahertz (GHz)) spectrum band. Initial reports recommended that the FCC would take the problem up in June, however, the 5. Nine GHz rule-making become now not protected at the tentative schedule for the commission’s June open meeting. Chairman Pai behind schedule the guideline-making at the request of U.S. Transportation Secretary Elaine Chao. The FCC has no longer furnished a timeline for the rule of thumb-making, but we anticipate the launch of the guideline-making sometime this summer.

Dedicated quick-range communications

Since 1999, spectrum in this band has been reserved for devoted brief range communications (DSRC). DSRC enables car-to-car (V2V) and vehicle-to-everything (V2X) communications that can assist reduce visitors fatalities and accidents and reduce site visitors congestion. The use restrictions and technical regulations applicable to operations in the 5.9 GHz band are loads more proscriptive than the rules that normally apply to the bands used for business wi-fi offerings including Long Term Evolution generation (LTE) and Wi-Fi. As a result, some FCC stakeholders have urged the FCC to use the rule-making to provide extra flexibility inside the forms of offerings in order to be allowed in the band and to promote sharing between offerings. With some remarkable exceptions (e.G., General Motors and Toyota), the car industry has been gradual to put money into and develop merchandise primarily based on DSRC. In his statement about the 5. Nine GHz rulemaking, Chairman Pai defined this spectrum as “largely lying fallow” for the past 20 years.

While DSRC has been sluggish to emerge on a large scale, broadly speaking because the federal authorities have refused to date to mandate its use in automobiles, mobile and Wi-Fi technologies have blossomed. Proponents of recent cellular-based totally technologies for automobile protection (e.G., mobile V2X (C-V2X)) need to get right of entry to to the upper 20 MHz part of the five. Nine GHz band to preserve to test and broaden this technology. Wireless and cable companies also see big ability within the band for the shipping of gigabit Wi-Fi. They want to look all or at least a part of the band opened for the provision of these offerings on an unlicensed basis.


Changes to the 5. Nine GHz band guidelines have been at the desk for many years, but the time now appears ripe for FCC motion. The FCC opened a rule-making proceeding for the five.9 GHz band numerous years in the past to discover the ability for sharing among DSRC and unlicensed gigabit Wi-Fi, and it has performed a few trying out of prototype 5.9 GHz Wi-Fi devices to determine whether and how properly they are able to proportion the band with DSRC with out causing dangerous interference. FCC Commissioners Michael O’Reilly and Jessica Rosenworcel have lengthy referred to as for a revamping of the 5. Nine GHz policies, broadly speaking to permit gigabit Wi-Fi. Industry forces also are increasing strain at the FCC for a clean method. Cellular providers and many automobile manufacturers have sought rule changes that would permit C-V2X operations inside the band. Toyota introduced currently that it has halted plans to deploy five.9 GHz DSRC due to the unsure regulatory climate and the shortage of adoption with the aid of other automotive companies. Around the same time, Ford announced that it plans to deploy C-V2X generation in its vehicles starting in 2020. And the European Union opted for DSRC over C-V2X because the protection platform for linked vehicles.

In this new intending, the FCC will recall whether and a way to permit sharing in the band among DSRC, gigabit Wi-Fi, and C-V2X technologies. Chairman Pai mentioned a huge range of capacity consequences for the new rule-making. As examples, the FCC ought to:

Maintain the cutting-edge allocation for DSRC(this outcome appears unlikely due to the fact the chairman has already discovered his skepticism approximately this approach, given the records and outlook for DSRC).
Allocate the band for exceptional use for C-V2X technology.
Allocate the band for exclusive use by means of automobile communications technology generally.
Allocate the band solely for unlicensed makes use of which include gigabit Wi-Fi.
Permit sharing between unlicensed uses and automobile protection and different communications inside the lower forty five MHz of the band, and allow distinct use for V2V technologies inside the top 30 MHz of the band.
Permit exclusive use for unlicensed technologies within the decrease 45 MHZ of the band and distinctive use for automobile protection and different communications in the higher 30 MHZ of the band.


In an associated depend, on May 23, 2019, the Department of Transportation (DOT) announced that it will maintain a convention on traffic safety and the five.9 GHz spectrum band on June three to are looking for input concerning V2X communications. The reason for the conference is to assist DOT to understand cutting-edge and future investment techniques for V2X, as well as issues for spectrum, use to foster interoperability and compatibility. DOT has reopened docket DOT-OST-2018-0210 for feedback in connection with the conference via June 8, 2019.

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