MEMA submitted comments on Nov. 28 in response to the Federal Communications Commission (FCC) report that looked at potential sharing solutions between unlicensed devices and dedicated short range communications (DSRC) operations in the 5.9 GHz spectrum. This spectrum, dubbed by the industry as the “Safety Spectrum,” has long been reserved for intelligent transportation systems communications, including vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) and other related communications.
MEMA has long advocated that this spectrum be preserved as intended and not shared until further study conclusively shows that there would be no interference of the critical basic safety message (BSM) transmission via DSRC.
The FCC conducted the first phase of testing to evaluate sharing, and the long-awaited report was finally released in October. The FCC’s Office of Engineering and Technology (OET) issued a public notice requesting comments on Report TR 17-1006. Initial comments were due Nov. 28 with reply comments due Dec. 13.
While MEMA indicated appreciation for FCC’s commitment to finding the best method to deploy vehicle safety applications while working to meet demands for spectrum use, MEMA remains concerned about the limited scope of the first phase study. In particular, MEMA suggests that the study did not adequately address questions related to the efficacy of detect-and-vacate or re-channelization.
MEMA stated, “Since any lost V2V Basic Safety Messages could result in a collision, significant additional studies will be required to evaluate these spectrum sharing methods. Therefore, MEMA recommends that the FCC, DOT, and DOC continue and complete the 3-Phase Test Plan regarding spectrum sharing technology. In the interim, MEMA continues to urge the FCC to preserve the 5.9 GHz spectrum designation and channelization features as they exist today for DSRC, which is a critical vehicle safety technology.”
The Safety Spectrum Coalition, of which MEMA is a member, also submitted comments to FCC.