Utility Disputes Validity of 900 MHz Interference Data Filed by NextEra
Tuesday, April 14, 2020 | Comments

Ameren Missouri told the FCC that it rejects the validity of data showing interference will be caused by LTE operations to adjacent narrowband LMR operations if a broadband segment is inserted into the 900 MHz band.

NextEra filed a report with the FCC outlining tests that it said indicate that LTE broadband signals (noise) interfere with LMR operations. The utility said the Utilities Technology Council (UTC) made the report available to its members.

In its filing, Ameren said it participated in good faith in the testing effort as a UTC member, and based on its interpretation of the report, “no conclusions should be drawn from it due to the flawed methodology.” The filing doesn’t provide details about how the data is flawed.

Ameren Missouri is supportive of the FCC’s 900 MHz broadband proposal and signed a letter of intent (LOI) with Anterix, which petitioned the FCC for the 900 MHz realignment, for a long-term lease of 900 MHz broadband spectrum to enable the utility to deploy a private LTE network for its service territories in Missouri and Illinois.

Ameren Missouri operates an L3Harris Project 25 (P25) system, and as part of its long-term strategy, plans to migrate to an LTE network. The utility’s initiative involves merging critical communications of the P25 system and the LTE networks with its planned investment in a corporatewide LTE network. This further enhances the need for a low-band, broadband-capable spectrum in the LTE standard, the filing said.

A UTC spokesman said the organization has no comment or position on the data.

The Ameren filing is here.

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