FCC seek comments on NextNav petition for rulemaking on lower 900MHz ISM band

Original Article ↗ Hacker News Discussion ↗

Overview of the FCC / NextNav Proposal

  • FCC is seeking public comment on NextNav’s petition to reconfigure the 902–928 MHz “lower 900 MHz” ISM band.
  • NextNav proposes a 5 MHz uplink block at 902–907 MHz paired with a 10 MHz downlink at 918–928 MHz, pushing other non‑M‑LMS users into 907–918 MHz.
  • The stated purpose is a terrestrial PNT (positioning, navigation, timing) network and “excess spectrum” for commercial broadband (LTE/5G‑like services).

Impact on Existing Users

  • Many note the band is heavily used today:
    • Amateur radio (33 cm band), Meshtastic, LoRaWAN, 802.11ah/HaLow, Z‑Wave, industrial/ag/agricultural sensors, weather stations, smart power/water/gas meters, legacy cordless phones/baby monitors.
  • Some LoRa deployments might fit into 907–918 MHz, but there is concern about crowding and migration from displaced uses.
  • Z‑Wave in North America (908–916 / 912–920 MHz) would overlap and could be affected.
  • NextNav seeks removal of current “no harmful interference to Part 15” protections, which commenters read as explicitly exposing unlicensed devices to interference with no recourse.

Fairness, “Taking from the Commons,” and Windfall

  • Strong sentiment that this is privatization of a public/commons band for corporate profit, potentially resold later to big telecom.
  • The FCC itself asks about “windfall” to NextNav from a nationwide, flexible‑use license.
  • Some see this as part of a broader pattern of spectrum being gifted or misallocated, then lying fallow or being monetized with little public benefit.

Technical and Policy Skepticism

  • Multiple commenters question why 15 MHz contiguous is technically required for PNT; some argue the real goal is a private LTE/5G‑style data network.
  • Concern that millions of deployed devices could suffer degraded or lost operation, with no guarantees of continuity.
  • Others argue the U.S. should expand, not shrink, unlicensed ISM bands to support experimentation and IoT.

Alternatives and Governance

  • Suggestions that a GPS backup and time distribution network should be run by public entities (DOT, DoD) or via upgraded LORAN / broadcast subcarriers / cell beacons, not a rent‑seeking private operator.
  • Broader debate on spectrum policy: auctions vs. coordination, time‑limited vs. “forever” allocations, and how to represent diffuse unlicensed users versus a single organized petitioner.

Calls to Action

  • Multiple comments urge U.S. readers to formally oppose the petition by filing comments in FCC docket 24‑240, including explaining concrete personal and technical impacts.