Use of the 5.850-5.925 GHz Band - Notice of Proposed Rulemaking

United States
United States
, 2019-12-19

According Fact-Sheet ET Docket No 19-138The Federal Communication Commission (FCC) wants to release more frequencies for WLAN (5.850-5.925GHz) precisely for V2x Use.


„For the past two decades, the 5.9 GHz band (5.850-5.925 GHz) has been reserved for use by Dedicated Short Range Communications (DSRC), a service in the Intelligent Transportation System (ITS) designed to enable vehicle-related communications. Since that time, the DSRC service has evolved slowly and has not been widely deployed. The Commission initiates this Notice of Proposed Rulemaking to take a fresh and comprehensive look at the 5.9 GHz band rules and propose appropriate changes to ensure the spectrum supports its highest and best use. The Commission proposes to continue to dedicate spectrum in the upper 30 megahertz of the 5.9 GHz band to meet current and future ITS needs for transportation and vehicle safety-related communications, while repurposing the lower 45 megahertz of the band for unlicensed operations like Wi-Fi.

What the NPRM would do:

• Propose to repurpose the lower 45 megahertz of the band (5.850.5.895 GHz) for unlicensed operations to support high-throughput broadband applications

• Propose that unlicensed device operations in the 5.850-5.895 GHz band be subject to all of the general Part 15 operational principles in the Unlicensed National Information Infrastructure (U-NII) rules. Propose to adopt technical and operational rules (e.g., power levels, out-of-band emissions limits) similar to those that already apply in the adjacent 5.725-5.850 GHz (U-NII-3) band.

• Propose to continue to dedicate spectrum in the upper 30 megahertz of the 5.9 GHz band (5.895- 5.925 GHz) to support ITS needs for transportation and vehicle safety-related communications.

• Propose to revise the current ITS rules for the 5.9 GHz band to permit Cellular Vehicle to Everything (C-V2X) operations in the upper 20 megahertz of the band (5.905-5.925 GHz).

  • Seek comment on whether to retain the remaining 10 megahertz (5.895-5.905 GHz) for DSRC systems or whether this segment should be dedicated for C-V2X
  • Propose to require C-V2X equipment to comply with the existing DSRC coordination rules for protection of the 5.9 GHz band Federal Radiolocation Service.
  • Propose to retain the existing technical and coordination rules that currently apply to DSRC, to the extent that we allow DSRC operations in the 5.895-5.905 GHz band.

• Seek comment on how DSRC incumbents would transition their operations out of some or all of the 5.9 GHz band if the proposals are adopted.

This document is being released as part of a “permit-but-disclose” proceeding. Any presentations or views on the subject expressed to the Commission or its staff, including by email, must be filed in ET Docket No. 19-138, which may be accessed via the Electronic Comment Filing System ( Before filing, participants should familiarize themselves with the Commission’s ex parte rules, including the general prohibition on presentations (written and oral) on matters listed on the Sunshine Agenda, which is typically released a week prior to the Commission’s meeting. See 47 CFR § 1.1200 et seq.“


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