ESIM Approval Should Protect 28 GHz UMFUS, FCC Told
The FCC's earth stations in motion order on commissioners' May 13 agenda (see 2004220048) doesn't address the interference risk from ESIMs in the 28.35-28.6 GHz band to terrestrial operations in the adjacent 27.5-28.35 GHz upper microwave flexible use service (UMFUS)…
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band, Verizon and U.S. Cellular told staffers, recounted a docket 17-95 posting Tuesday. They urged a Further NPRM on interference risk. The carriers said the mobility of ESIMs makes predicting interference difficult, and adding non-geostationary ESIMs into the 28 GHz band would "upend" traditional routes of resolving interference between adjacent band fixed satellite service earth stations and UMFUS operations. The companies said an FNPRM should ask about good limits or regulatory steps to protect adjacent band 28 GHz UMFUS operations, and appropriate measures for protection of adjacent band UMFUS operations such as guard band use or out-of-band emission limits. Among those the companies met with were International Bureau Chief Tom Sullivan, aides to Chairman Ajit Pai and the other commissioners, and Wireless Bureau and Office of Engineering and Technology staff.