AT&T Says User Permissions on Handsets Could Hinder 9-1-1 Z-Axis Rules
Friday, July 26, 2019 | Comments

AT&T continued to question the FCC’s proposed 9-1-1 indoor location accuracy requirements. AT&T executives met with FCC officials to discuss whether Z-axis solutions that depend on user permissions on the handset to calibrate barometric pressure sensors could be compliant with the FCC’s proposed vertical accuracy rules.

“Because these calibration processes would, by necessity, share detailed location information with a third party outside of the context of a 9-1-1 call, they would require user consent, such as by providing the user an option to enable/disable such processes,” AT&T said in an ex parte filing. “While such Z-axis solutions may produce vertical location results within the FCC’s proposed 3-meter accuracy target when enabled, these solutions would very likely produce results outside this target if users declined permissions for these processes to operate.

Therefore, the FCC should consider whether these options for Z-axis solutions would be able to comply with the commission’s proposed vertical accuracy rules or whether it should consider adopting a more flexible vertical accuracy requirement, AT&T said.

In June, AT&T argued against requiring floor-level data and agreed with Google that the FCC use a timetable for increasingly demanding Z-axis call coverage and/or geographic coverage requirements. “Given the variances in building structural characteristics and terrain, AT&T continues to believe that imposition of a floor level data requirement is infeasible at this time,” AT&T said in its reply comments to the FCC’s proposed rules. The AT&T ex parte filing is here.

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