U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.


Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The Commission is reviewing potential sharing solutions between proposed Unlicensed National Information Infrastructure (U-NII) devices and Dedicated Short Range Communications (DSRC) operations in the 5.850-5.925 GHz (U-NII-4) band in ET Docket No. 13-49.

U-NII devices provide short-range, high-speed unlicensed wireless connections in the 5 GHz band for, among other applications, Wi-Fi-enabled radio local networks, cordless telephones, and fixed outdoor broadband transceivers used by wireless internet providers.

DSRC uses short-range wireless communication links to facilitate information transfer between appropriately-equipped vehicles and appropriately-equipped roadside systems (“vehicle to infrastructure” or “V2I”) and between appropriately-equipped vehicles (“vehicle to vehicle” or “V2V”).

The Commission is working with the Department of Transportation (DoT), and the automotive and communications industries to evaluate potential sharing techniques. On June 1, 2016 the Commission issued a public notice to refresh the record in the pending proceeding and described a three-phase test plan.


October 29, 2018 – Dedicated Short Range Communications (DSRC) Phase One Testing

OET is performing a study on U-NII-4 prototype devices that have been submitted to demonstrate potential sharing solutions between the proposed U-NII devices and Dedicated Short Range Communications (DSRC) operations in the 5850-5925 MHz (U-NII-4) frequency band. The OET Laboratory Division just concluded Phase One of the tests in a laboratory setting. The test results provide a baseline data for performing analysis of additional operational scenarios and other “real-world” empirical tests as part of the future phases of the coexistence test effort

October 21, 2016 – DSRC and U-NII-4 Prototype Device Testing Open House

Presentations given at the FCC Laboratory DSRC and U-NII-4 Test Plan Open House on October 21, 2016:

October 7, 2016 – DSRC and U-NII-4 Prototype Device Testing Open House

OET will hold a DSRC Test Plan Open House on October 21, 2016 at its Laboratory to review the Phase I testing. The Open House will take place from 10 a.m. to Noon. The FCC Laboratory is located at 7435 Oakland Mills Rd., Columbia, Maryland 21046 (telephone (301) 362-3000). The Open House will be open to all interested parties. However, due to space limitations the number of attendees may be limited. Space has been reserved for each of the parties submitting prototype test samples. Attendance by other parties will be on first-come, first-served basis. Parties desiring to attend must register no later than October 17, 2016 by providing their names and organizations by telephone or e-mail to Reza Biazaran at (301) 362-3052 or by e-mail at Reza.Biazaran@fcc.gov.

Test Plan and Test Results
  • TR Report 17-1006 "Phase I Testing Of Prototype UNII-4 Devices" [PDF]
  • U-NII-4-to-DSRC EMC Test and Measurement Plan, Phase I: FCC Laboratory Tests [PDF]

Dedicated Short Range Communications (DSRC) Service,

U.S. Department of Transportation, DSRC Unlicensed Device Test Plan,