comment period for establishing a new citizen’s band radio service at 3.5 GHz
has been extended. The Federal Communications Commission has moved the comment reply
deadline for its 3.5 GHz CB proceeding from Aug. 1 to Aug. 15. Several spectrum
user groups petitioned the commission for the extension because of the
“relatively large volume of comments” that “addressed complicated technical
issues,” and, because the FCC’s Electronic Comment Filing System was
overwhelmed for two days during the CB docket comment cycle.
The feedback loop involves a proposal by the FCC in April to open up frequencies
between 3,550 and 3,700 MHz for a new CB service. The commission is looking to
create a three-tiered access model for federal and non-federal incumbents,
priority access licensees, and general authorized access users, who will share
“The 3.5 GHz band could be an ‘innovation band,’ where we can explore new
methods of spectrum sharing and promote a diverse array of network
technologies, with a focus on relatively low-powered applications,” the
commission said in the April 23 Further
Notice of Proposed Rulemaking
Under the proposed three-tier user arrangement, federal users and grandfathered
Fixed Satellite Services earth stations, would belong to an incumbent tier and
receive interference protection from CB users, who would belong to the general
authorized access tier. In between the two would be a priority access tier for
new small cell technologies, which would be protected from the CB users but not
allowed to interfere with incumbents.
The three-tiered user arrangement came out of the July 2012 recommendations of
the President’s Council of Advisors on Science and Technology, or PCAST. Under
the framework, all user would register in a database modeled on those now in
use for unlicensed devices transmitting in TV white spaces. The council also advised
the federal government to “identify 1,000 MHz of federal spectrum for shared
use to create ‘the first shared use spectrum superhighways.’”
The commission further proposed requiring Exclusion Zones to protect federal
spectrum users from CB enthusiasts.
would also require that devices using 3,350 to 3,700 MHz be interoperable
across all frequencies.
It proposes a 24 dBm per 10 MHz peak transmit power limit for CB radios in
areas and 30 dBm per 10 MHz
for rural areas. It proposes a maximum EIRP for end-user devices of 23 dBm per 10 megahertz, and a -80 dBm signal
level threshold as measured by a 0 dBi isotropic antenna in 10 MHz anywhere
along any priority-access service area boundaries. It further proposes OOBE of
43 + 10 log (P) dB, and 70 + 10 log (P) dB for emissions below 3,520 MHz and
above 3,680 MHz.
Comment replies on Docket. No. 12-354 are now due Aug. 15, 2014.