米国5GHz周波数解放状況

5 14

414

013

613

212

812

412

011

611

210

810

410

0

165

161

157

153

149

6460565248444036IEEE channel #

20 MHz40 MHz80 MHz

160 MHz

UNII-1 UNII-2 UNII-2 UNII-35250MHz

5350MHz

5470MHz

5725MHz

9692888480767268 169

173

177

181

5825MHz

5925MHz

Currently available channels Potential new channels

he FCC released a Notice of Proposed Rulemaking outlining proposals to amend Part 15 of its Rules governing the operation of Unlicensed National Information Infrastructure (U-NII) devices in the 5 GHz band./ The NPRM covers potential changes to the rules governing the existing spectrum allocated for U-NII devices as well as the addition of 195 megahertz of spectrum to the 5 GHz U-NII bands. Below is a brief summary of the FCC’s proposals. Comments are due 45 days, and reply comments 75 days, respectively, after Federal Register publication of the NPRM, which has not yet occurred. / Revision of Part 15 of the Commission’s Rules to Permit Unlicensed National Information Infrastructure (U-NII) Devices in the 5 GHz Band, Notice of Proposed Rulemaking, ET Docket No. 13-49 (rel. Feb. 20, 2013) (“NPRM”).