The FCC plan is not limited to jamming of phones on spectrum licensed for the exclusive use of wireless carriers. The FCC additionally sought comment on whether contraband devices operating on Wi-Fi airwaves and other unlicensed spectrum should be subject to jamming. That’s concerning to the Wi-Fi Alliance because Wi-Fi operates on unlicensed spectrum that is shared by many users.
“Accordingly, declaring that a jammer on unlicensed spectrum is permitted to disrupt the communications of another device also operating on unlicensed spectrum is contrary to the foundational principle of Part 15 [of FCC rules], under which all unauthorized devices must cooperate in the use of spectrum,” the group said. “Moreover, authorizing the use of jamming equipment in unlicensed spectrum pursuant to Part 15 would undermine decades of global spectrum policy, weaken trust in license-exempt technologies by providing no assurance that devices using those technologies will work, and set a dangerous precedent for the intentional misuse of unlicensed spectrum.”
Letting jammers interfere with Wi-Fi and other unlicensed devices would effectively turn the jammers into “a de facto licensed service, operating with primary status in bands that are designated for unlicensed use,” the Wi-Fi Alliance said. “To achieve that undesirable result, the Commission would be required to change the Table of Frequency Allocations and issue authorizations for operations on unlicensed spectrum (just as it contemplates for the use of cell phone spectrum in jamming devices). That outcome would upend the premise of Part 15 operations.”
The GPS Innovation Alliance, another industry group, warned that even if the FCC imposes strict limits on transmission power and out-of-band emissions, “jammer transmissions can have spillover effects on adjacent and nearby band operations. Only specialized, encrypted signals, and specialized receivers and devices designed to decrypt those signals, are jam-resistant, in contrast to how most commercial technologies work.”
Now that public comments are in, Carr has to decide whether to move ahead with the plan as originally written, scrap it entirely, or come up with a compromise that might address some of the concerns raised by opponents. The FCC’s NPRM suggests a pilot program could be used to evaluate interference risks before a broader rollout, and the pilot idea received some support from carriers in their comments. A final proposal would be put to a vote of commissioners at the Republican-majority FCC.