[Federal Register Volume 86, Number 7 (Tuesday, January 12, 2021)]
[Rules and Regulations]
[Pages 2278-2296]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-26706]


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FEDERAL COMMUNICATIONS COMMISSION

47 CFR Part 15

[ET Docket No. 20-36; FCC 20-156; FRS 17258]


Unlicensed White Space Device Operations in the Television Bands

AGENCY: Federal Communications Commission.

ACTION: Final rule.

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SUMMARY: In this document, the Commission revises its rules to expand 
the ability of unlicensed white space devices to deliver wireless 
broadband services in rural areas and areas where fewer broadcast 
television stations are on the air. The Commission also modifies its 
rules to facilitate the development of new and innovative narrowband 
Internet of Things (IoT) devices in TV white spaces. Unlicensed white 
space devices operate in the VHF and UHF broadcast TV bands, a spectral 
region that has excellent propagation characteristics that are 
particularly attractive for delivering wireless communications services 
over long distances, varying terrain, and into and within buildings. 
The Commission adopts a number of changes to the white space device 
rules to spur continued growth of the white space ecosystem, especially 
for providing affordable broadband service to rural and unserved 
communities that can help close the digital divide, while at the same 
time protecting broadcast television stations in the band from harmful 
interference.

DATES: Effective February 11, 2021, except for amendatory instruction 
4.f. for Sec.  15.709(g)(1)(ii), which is delayed. The Commission will 
publish a document in the Federal Register announcing the effective 
date.

[[Page 2279]]


ADDRESSES: Federal Communications Commission, 45 L Street NE, 
Washington, DC 20554.

FOR FURTHER INFORMATION CONTACT: Hugh Van Tuyl, Office of Engineering 
and Technology, 202-418-7506, [email protected].

SUPPLEMENTARY INFORMATION: This is a summary of the Commission's 
document, Report and Order, FCC 20-156, ET Docket No. 20-36, adopted 
October 27, 2020 and released October 28, 2020. The full text of this 
document is available for public inspection and can be downloaded at: 
https://www.fcc.gov/document/fcc-increases-unlicensed-wireless-operations-tv-white-spaces-0 or by using the search function for ET 
Docket No. 20-36 on the Commission's ECFS web page at www.fcc.gov/ecfs.

Synopsis

    1. The Commission adopts targeted changes to the part 15 unlicensed 
device rules for white space devices in the TV bands to provide 
improved broadband coverage that will benefit American consumers in 
rural and underserved areas as well as to provide improved access to 
narrowband IoT applications that will benefit consumers and businesses 
while still protecting broadcast television stations from harmful 
interference. Specifically, the Commission permits higher EIRP 
(``equivalent isotropically radiated power'') and higher antenna HAAT 
(``height above average terrain'') for fixed white space devices in 
``less congested'' geographic areas. In addition, the Commission 
permits higher power mobile operation within ``geo-fenced'' areas in 
``less congested'' areas. The Commission also adopts rule changes 
designed to facilitate the development of new and innovative narrowband 
IoT services.
    2. The Commission declines at this time to allow higher power 
operation by white space devices operating within the service contour 
of an adjacent channel TV station or to change the methodology it uses 
to protect authorized services within the TV bands. The changes the 
Commission adopts apply only to white space devices operating on TV 
channels 2-35. The Commission excludes channel 36 from these changes 
based on the need to protect Wireless Medical Telemetry Service and 
Radio Astronomy Service operations on channel 37 (608-614 MHz).

Fixed White Space Devices in Rural Areas in the TV Bands

    3. The Commission adopts rule changes for fixed white space devices 
that operate in the TV bands to enable improved broadband service in 
rural areas and underserved areas. Specifically, in ``less congested'' 
areas the Commission increases the maximum permissible radiated power 
from 10 to 16 watts EIRP, and increases the maximum permissible antenna 
HAAT from 250 meters to 500 meters. Because the higher power and 
increased antenna limits will expand the maximum transmission range of 
white space devices, they will be able to provide broadband service 
over larger areas. Given these revisions, the Commission is 
commensurately increasing the minimum required separation distances 
between white space devices operating at higher power/HAAT and 
protected services in the TV bands.
Higher Power Limits
    4. Current rules permit fixed white space devices to operate on 
channels 2-36 with a 4 watts EIRP maximum in any area, provided the 
device meets minimum separation distances from co-channel and adjacent 
channel users in the band. In addition, a fixed white space device may 
operate with up to 10 watts EIRP on channels 2-35 in ``less congested'' 
areas, defined as those areas where at least half the television 
channels in the band of operation are not in use, provided the fixed 
device complies with larger separation distances from other users in 
the band. Fixed white space devices are limited to one-watt maximum 
conducted transmitter power, requiring devices with radiated power 
levels above one-watt EIRP to use an antenna with directional gain, 
e.g., 6 dBi to produce 4 watts EIRP, and 10 dBi to produce 10 watts 
EIRP.
    5. In the notice of proposed rulemaking (85 FR 18901, April 3, 
2020), the Commission proposed to permit fixed devices to operate in 
the TV bands, up to channel 35, with a maximum 16 watts EIRP (42 dBm) 
in ``less congested'' areas. The Commission proposed this change to 
permit fixed devices to reach users at greater distances in rural and 
other less congested areas, and thus enable improved broadband coverage 
at lower cost. The Commission proposed to maintain the one-watt 
transmitter conducted power limit for fixed devices and require instead 
that the higher power be achieved by using higher gain, more highly 
directional antennas to improve spectrum efficiency. The Commission 
proposed that in cases where an antenna with a gain higher than 12 dBi 
is used, the transmitter power must be reduced below one watt by the 
amount in dB that the antenna gain exceeds 12 dBi, in order to ensure 
that the EIRP from a fixed device does not exceed 16 watts EIRP.
    6. The Commission adopts its proposal to permit fixed white space 
devices to operate in the TV bands on channels 2-35 with a maximum 16 
watts EIRP (42 dBm) in ``less congested'' areas. The record generally 
supports this action, and as the Commission noted in the NPRM, this 
change will permit fixed devices used in ``less congested'' areas 
(including rural areas) to reach users at greater distances, thus 
enabling improved broadband coverage at less cost in these hard-to-
reach areas. In addition, higher power will enable signals to better 
penetrate foliage, buildings, and other obstacles, thus providing 
improved coverage at locations where there is not a direct line-of-
sight to the transmitter. The Commission also adopts its related 
proposals to maintain the transmitter conducted power limit of one 
watt, and to require that when an antenna with a directional gain of 
greater than 12 dB is used, the transmitter power must be reduced by 
the amount in dB that the antenna gain exceeds 12 dBi, thus ensuring 
that the maximum EIRP does not exceed 16 watts (42 dBm).
    7. The Commission limits higher power operation to ``less 
congested'' areas as proposed in the NPRM. This is consistent with the 
Commission's actions in other white spaces proceedings in which it 
initially took a cautious approach when adopting white space rules. 
This limitation will also minimize the likelihood of any potential 
harmful interference to authorized services in the TV bands since there 
are fewer authorized services in ``less congested,'' typically rural, 
areas. The Commission therefore declines requests by Broadband Connects 
America Coalition and Public Interest Spectrum Coalition to allow 
higher power in all areas, not just ``less congested'' ones.
    8. Restricting higher power operations only to ``less congested'' 
areas will also limit the potential impact on users of unlicensed 
wireless microphones (which share use of unused TV channels but are not 
entitled to any interference protection from unlicensed white space 
devices). Higher power operation will be permitted only at locations 
where multiple vacant channels are available for use by varying types 
of unlicensed users. The Commission's decision to limit the areas where 
higher power operations may occur should alleviate the concerns of 
wireless microphone operators about the potential impact that higher 
power white space devices would have on wireless microphone operations.

[[Page 2280]]

    9. The Commission is not increasing the maximum permissible 
conducted transmitter power as requested by some parties. NAB opposes 
this request, arguing that greater conducted power levels will 
inevitably lead to inadvertent or intentional overpowered operation and 
increased potential for interference. The Commission finds that 
increasing conducted transmitter power limits could encourage the use 
of lower gain (i.e., less directional) antennas, resulting in less 
efficient spectrum use and also increasing the potential for causing 
harmful interference to licensees and protected users. Requiring the 
use of more highly directional antennas will ensure that less white 
space device energy is directed outside the main antenna beam than 
would be the case if higher radiated power were achieved using lower 
gain, less directional antennas.
Higher Antenna Height Above Average Terrain Limits
    10. HAAT limit. The rules currently permit fixed white space 
devices to operate with a maximum 250-meter antenna HAAT. A white space 
database will not provide a list of available channels to a fixed white 
space device with an antenna HAAT that exceeds 250 meters, and such 
devices are not permitted to operate. The Commission adopted this 
requirement to limit the distance over which the fixed white space 
devices would transmit and thus limit the distance at which harmful 
interference to other TV band users could occur. The antenna HAAT limit 
also precludes white space devices from operating at certain locations, 
e.g., those where the ground HAAT exceeds 250 meters. In the White 
Spaces Order on Reconsideration, the Commission upheld its previous 
decision to maintain a 250-meter antenna HAAT limit but stated that it 
might consider increasing the limit in the future if there were a more 
complete record addressing whether higher HAAT could be permitted 
without causing harmful interference.
    11. In the NPRM, the Commission proposed to increase the maximum 
permissible antenna HAAT for fixed white space devices operating on 
channels 2-35 from 250 meters to 500 meters and sought comment on 
appropriate procedures that may be necessary to ensure that broadcast 
operations and other entities in the TV bands are protected from 
harmful interference. The Commission noted that increasing permissible 
antenna HAAT would improve broadband coverage in rural areas by 
enabling signals to reach greater distances and enable fixed white 
space devices to operate at locations where they are not currently 
permitted due to the 250-meter HAAT limit, such as existing towers 
located at higher ground elevations. To protect Wireless Medical 
Telemetry Service and radio astronomy operations on channel 37, the 
Commission did not propose to permit operation with a higher HAAT in 
the adjacent channel 36.
    12. Several commenters--including Adaptrum, Broadband Connects 
America Coalition, Consumer Technology Association, Dynamic Spectrum 
Alliance, Microsoft, Public Interest Spectrum Coalition, RADWIN, RED 
Technologies, RTO Wireless, and the Wireless internet Service Providers 
Association (WISPA)--support the proposal to increase the maximum HAAT 
for fixed devices to 500 meters as a way of promoting expanded 
coverage. Broadband Connects America Coalition, Microsoft, Public 
Interest Spectrum Coalition, and Dynamic Spectrum Alliance also 
recommend allowing higher HAAT in all areas, not just ``less 
congested'' ones.
    13. As proposed, the Commission increases the HAAT limit for fixed 
white space devices that operate in the TV bands on channels 2-35 from 
250 to 500 meters in ``less congested'' areas. As with the Commission 
decision to increase the maximum power allowed for fixed white space 
devices, this change will permit fixed devices used in ``less 
congested,'' including rural, areas to reach users at greater 
distances, thus enabling improved broadband coverage at less cost in 
these hard-to-reach areas. This change will also increase the number of 
locations where fixed white space devices can operate since it will 
permit white space device operators to use sites where the HAAT of the 
ground exceeds 250 meters, which would have been precluded under the 
current rules. Many parties support this change.
    14. While the Commission recognizes that some parties request that 
it not limit this higher HAAT to ``less congested'' areas, the 
Commission believes that a more cautious approach is appropriate at 
this time due to the significant increase in HAAT it is allowing and 
the potential for harmful interference at greater distances, as noted 
by Smith and Fisher. Therefore, consistent with the Commission's 
actions increasing the maximum power limit for fixed white space 
devices, the Commission is restricting operation of white space devices 
with an HAAT of greater than 250 meters to ``less congested'' areas 
where fewer authorized services and protected entities are expected to 
be operating in the TV bands. Relatedly, because there are expected to 
be fewer authorized services and protected entities operating in ``less 
congested'' areas, the Commission expects that the separation distances 
between white space devices and authorized services and protected 
entities to generally be greater. This combination of fewer potential 
interactions between white space devices and authorized services and 
protected entities and greater distance separation minimizes the 
potential for harmful interference to such services. Moreover, these 
white space devices are still required to operate pursuant to the 
channel availability and power levels provided by a white space 
database which is designed to ensure that harmful interference does not 
occur. While wireless microphone interests express concerns about the 
impact of increased HAAT on unlicensed wireless microphone operations, 
restricting higher HAAT operations to ``less congested'' areas will 
serve to limit any impact on users of unlicensed wireless microphones 
since by definition these areas have multiple vacant TV channels (i.e., 
at least half) available for use by other types of unlicensed 
operations. The Commission also notes that the rules do not provide 
harmful interference protection between unlicensed devices. However, 
because fixed white space device locations are registered in a 
database, unlicensed wireless microphone users have the ability to 
check the database and avoid using channels where a higher probability 
of harmful interference is predicted. In addition to limiting the use 
of high HAAT to ``less congested'' areas, as discussed in more detail 
below, the Commission is increasing the required separation distances 
between white space devices operating with higher HAAT and co-channel 
and adjacent channel TV contours to further minimize the likelihood of 
harmful interference.
    15. Coordination procedure with licensees. The Commission sought 
comment on whether to require a coordination procedure between white 
space device operators and broadcast licensees when fixed white space 
devices operate with an HAAT exceeding 250 meters. In particular, the 
Commission requested comment on Microsoft's suggested coordination 
procedure comprised of several steps, including notifying a white space 
database administrator, notifying broadcast licensees, operating on a 
test basis on a 30-day trial authorization, as well as a process to 
submit claims of harmful interference, investigate such

[[Page 2281]]

claims, and upon satisfactorily addressing any such claims, permit 
authorization on a permanent basis. The Commission expressed concern 
about the complexity of Microsoft's suggested coordination procedure 
and whether such a procedure is even warranted given the existing 
obligations of unlicensed devices to protect authorized radio services 
and other protected users. The Commission also sought comment on a 
simpler alternative to this procedure. Specifically, the Commission 
sought comment on whether a party wishing to operate a fixed white 
space device at an HAAT greater than 250 meters should be required to 
notify potentially affected, protected entities of their intended 
operation at least 48 hours in advance. The notification would include 
the prospective white space device operator's contact information, 
geographic coordinates of the antenna, antenna height above ground and 
average terrain, EIRP and channel(s) of operation. For notification 
purposes, a potentially affected TV station would be defined consistent 
with Microsoft's proposal, i.e., a station would receive notification 
if its broadcast contour was within the separation distance 
corresponding to an assumed HAAT 50 meters higher than the actual 
deployment.
    16. Adaptrum, Microsoft, and WISPA support the more streamlined 
coordination procedure with broadcasters that the Commission proposed 
in the NPRM. RADWIN, RED Technologies, and Dynamic Spectrum Alliance 
assert that no coordination procedure is necessary since unlicensed 
device operators already have an obligation to not interfere with 
authorized services, although RED Technologies states that it supports 
the Commission's proposed coordination procedure if one is required.
    17. The Commission adopts the simpler procedures proposed in the 
NPRM, except it will require that notifications be made four calendar 
days in advance of operating at an increased HAAT, in response to 
concerns raised by some parties that 48 hours is not sufficient notice. 
The Commission requires this coordination procedure because white space 
devices operating at high HAAT have the potential to interfere with TV 
reception at large distances. Several parties support this simpler 
procedure, which will ensure that TV broadcasters are aware of new 
white space device operations with high HAAT that have the potential to 
affect broadcast operations at greater distances. This procedure 
provides an opportunity for TV broadcasters to work with white space 
system operators to address any concerns regarding potential harmful 
interference situations.
    18. Parties operating white space devices on an unlicensed basis 
have an ongoing obligation under the rules to cease operation if 
harmful interference occurs to any authorized service. The complex 
multi-step procedure, including a 30-day trial period, initially 
suggested by Microsoft and supported by NAB is therefore unnecessary. 
For example, requiring a 30-day trial period appears unnecessary since 
the unlicensed device operating parameters (location, channel, power, 
and antenna height) during a trial period would be no different than 
those planned for normal operation of the device. In addition, parties 
who believes that an unlicensed device is causing harmful interference 
may report this occurrence to the Commission and unlicensed device 
operator at any time, so there appears to be no need to require a 
specific time period for reporting and investigating interference 
complaints. An unlicensed device that causes harmful interference to an 
authorized service must cease operation regardless of whether the 
interference was found during the first 30 days of operation or 
sometime later.
    19. As proposed in the NPRM, the Commission requires that when a 
party plans to operate a fixed white space device with an HAAT greater 
than 250 meters, it must contact a white space database and identify 
all TV broadcast station contours that would be potentially affected by 
operation at the planned HAAT and EIRP. The Commission will define a 
potentially affected TV station as one where the protected service 
contour would be within the applicable separation distance if the white 
space device were operating at an HAAT of 50 meters above the planned 
HAAT at the proposed power level. The Commission will also require that 
the installing party notify each of these broadcast licensees and 
provide the geographic coordinates of the white space device, relevant 
technical parameters of the proposed deployment, and contact 
information. The Commission will permit this process to be automated 
through the white space database, with notifications sent to a TV 
station licensee's address of record with the Commission. The white 
space device may commence operations no earlier than four days after 
the notification.
    20. The Commission believes that increasing the notification period 
from two to four days balances broadcasters' concerns regarding having 
sufficient time to review proposed white space device operations when 
operating at high HAATs and the need for white space device operators 
to begin providing service. Because these white space devices are 
restricted to ``less congested'' areas, the Commission does not expect 
broadcasters to be overloaded with notification requests. Also, because 
device installation must generally be planned in advance, the four-day 
requirement should not unduly delay new broadband service to rural and 
underserved areas.
    21. The Commission also adopts the other elements of the 
coordination procedure proposed in the NPRM. Specifically, the 
Commission will require that, upon request, the installing party must 
provide each potentially affected licensee with information on the time 
periods of operations. This will help licensees investigate alleged 
harmful interference from white space devices. The Commission will also 
require that if the installing party seeks to modify its fixed 
operations by (i) increasing its power level, (ii) moving more than 100 
meters horizontally from its location, or (iii) making an increase in 
the HAAT or EIRP of the white space device that results in an increase 
in the minimum required separation distances from co-channel or 
adjacent channel TV station contours, then it must conduct a new 
coordination. This requirement will ensure that TV broadcast licensees 
have the most current information on white space device operations. The 
Commission selects 100 meters as the minimum change in location for 
which a new coordination is required since the tables of separation 
distances from TV station contours are rounded to the nearest 0.1 
kilometer (100 meters). The Commission see no benefits in requiring a 
new coordination for changes less than 100 meters.
    22. The Commission declines to require parties planning to operate 
white space devices with an HAAT above 250 meters to notify public 
safety or wireless microphone licensees prior to commencing operation, 
as requested by NPSTC, Sennheiser, and Shure. Their services are very 
different from broadcast TV. In the case of broadcast TV, white space 
devices must protect a consumer receive-only service with very weak 
signal levels at long distances from the transmitter. By contrast, 
public safety licensees operate two-way voice and data systems, 
generally operate with much higher signal levels than those a consumer 
receives at the edge of a TV contour and could increase power if 
necessary. Wireless microphones also operate at significantly higher 
signal levels than those at the edge of a TV contour. In addition, the 
required

[[Page 2282]]

separation distances from licensed wireless microphones are much 
shorter than those for broadcast TV and are in fact shorter than the 
distances over which HAAT is calculated (3 to 16 kilometers). 
Therefore, the Commission believes it is unnecessary to notify wireless 
microphone licensees of nearby white space devices operating at high 
HAAT since the HAAT is undefined at the wireless microphone's location.
    23. Antenna height above ground. The Commission previously 
increased the maximum permissible antenna height above ground from 30 
meters to 100 meters in ``less congested'' areas in the White Spaces 
Order on Reconsideration (84 FR 34792, July 19, 2019). It took this 
action to improve wireless broadband service to Americans in rural and 
other underserved areas, and stated that a 100-meter antenna height 
above ground limit will benefit wireless broadband providers and users 
by permitting antennas to be mounted on towers or other structures at 
heights sufficient to clear intervening obstacles such as trees and 
hills that would attenuate the transmitted signal, thereby increasing 
the range at which the signal can be received.
    24. In the NPRM, the Commission sought comment on whether to 
increase the antenna height above ground limit in addition to the HAAT 
limit, noting that antenna heights above ground and average terrain are 
directly related, in that any change to a device's antenna height above 
ground changes its HAAT by the same amount. The Commission further 
noted that limiting the antenna height above ground may also limit the 
maximum achievable HAAT in areas where the terrain is flat since in 
those areas the HAAT will be approximately the same as, or not 
significantly higher than, the antenna height above ground. This means 
that the antenna height above ground limit (30 or 100 meters) may 
preclude white space device operators from taking advantage of a higher 
HAAT limit, or even the current 250-meter limit. The Commission sought 
comment on whether it should increase the antenna height above ground 
limit or remove it completely and rely only on HAAT since the 
separation distances from protected services are based on HAAT. The 
Commission also sought comment on whether modified rules should apply 
across the entire U.S. or only in certain areas, such as ``less 
congested'' areas.
    25. The Commission eliminates the requirement that a fixed device's 
antenna height above ground may not exceed 30 meters generally or 100 
meters in ``less congested'' areas. Several parties support eliminating 
this requirement opining that it is unnecessary. As the Commission 
noted in the NPRM, the separation distances from protected services are 
based on the antenna HAAT, and the HAAT already takes into account the 
antenna height above ground. Therefore, there does not appear to be a 
need for a separate antenna height above ground limit, and limiting the 
height above ground can unnecessarily limit the maximum achievable 
HAAT. CP Communications and Sennheiser assert that the Commission has 
previously concluded that there is no general need to mount an antenna 
higher than the current limit to avoid shadowing by trees or other 
obstructions and that the current limit should therefore not be 
changed. The Commission acknowledges that it did decide in the 2015 
White Spaces Order (80 FR 73044, Nov. 23, 2015) that there was no need 
for a higher antenna height above ground limit. However, upon further 
consideration the Commission reversed its decision and decided that 
there was a need to increase this limit in ``less congested'' areas in 
the 2019 White Spaces Order on Reconsideration. In that proceeding, the 
Commission stated ``that real world experience has sufficiently 
demonstrated that increasing the allowable height above ground would be 
beneficial for operators in less congested areas'' and that such a 
change would not increase the potential to cause harmful interference 
to other users. In that same White Spaces Order on Reconsideration, the 
Commission noted Sennheiser's concern about potential interference to 
wireless microphones from a higher height limit, but concluded that 
limiting higher antenna height to less congested areas, where there are 
many vacant channels, ensures there will be sufficient spectrum 
resources in these areas for multiple spectrum users. Finally, the 
Commission notes that no party provided specific information or 
analysis in response to the NPRM showing that there is actually a need 
to retain an antenna height above ground limit.
    26. However, the Commission is not removing the 10-meter height 
above ground limit that applies to fixed white space devices operating 
within the protected contours of adjacent channel TV stations since the 
NPRM did not seek comment on changing that limit and no party indicated 
a need to do so. That height limit could be addressed at a future date.
Separation Distances
    27. The Commission increases the minimum required separation 
distances between white space devices operating at higher power and 
HAAT and the following services in the TV bands: (1) Broadcast 
television services, including low power; (2) receive sites of TV 
translators, low power TV stations, Class A TV stations, Multichannel 
Video Programming Distributors (MVPDs), and Broadcast Auxiliary Service 
(BAS) facilities; (3) private land mobile radio services and commercial 
mobile radio services (PLMRS/CMRS), and (4) licensed low power 
auxiliary service (LPAS) stations, including licensed wireless 
microphones. The increases the Commission adopts will protect these 
services from potentially receiving harmful interference as a result of 
expanded white space device operating parameters.
    28. Broadcast television services, including low power. In the 
NPRM, the Commission proposed to expand the existing tables of minimum 
separation distances from broadcast television protected contours (both 
co-channel and adjacent channel) to include additional entries for 
fixed white space device operation at up to 500 meters HAAT and 42 dBm 
EIRP. No party argued that the proposed separation distances from co-
channel and adjacent channel TV station protected contours are 
inadequate to prevent interference to TV reception. However, several 
parties request that the Commission significantly change the 
methodology used to protect services in the TV bands. Dynamic Spectrum 
Alliance, WISPA, and Public Interest Spectrum Coalition argue that the 
Commission should determine white space channel availability using a 
terrain-based model, such as the Longley-Rice Irregular Terrain Model, 
which they assert will determine channel availability more accurately 
than the overly conservative current contour-based model. NAB and 
Sennheiser, however, oppose using the Longley-Rice model due to 
concerns about its accuracy in protecting TV receivers and because it 
may slow operation of the white space database.
    29. The Commission adopts the updated tables of separation 
distances from TV contours proposed in the NPRM. As noted, NAB 
supported these proposed separation distances in its comments to 
Microsoft's petition. In addition, the Commission adds a row at the end 
of each table (co-channel and adjacent channel) to include separation 
distances for white space devices with HAAT values over 500 meters and 
up to 550 meters, which will be used only for the purpose of 
determining which TV broadcast stations must be notified when a white 
space device operates with an HAAT of more than 450 meters and up to 
500 meters.

[[Page 2283]]



--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                Fixed white space devices
---------------------------------------------------------------------------------------------------------------------------------------------------------
                                                    Required separation in kilometers from co-channel digital or analog TV  (full service or low power)
                                                                                            protected contour *
    Antenna height above  average terrain of     -------------------------------------------------------------------------------------------------------
          unlicensed devices  (meters)             16 dBm (40  20 dBm (100  24 dBm (250  28 dBm (625     32 dBm     36 dBm (4    40 dBm (10   42 dBm (16
                                                      mW)          mW)          mW)          mW)       (1,600 mW)       W)           W)           W)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Less than 3.....................................          1.3          1.7          2.1          2.7          3.3          4.0          4.5          5.0
3-10............................................          2.4          3.1          3.8          4.8          6.1          7.3          8.5          9.4
10-30...........................................          4.2          5.1          6.0          7.1          8.9         11.1         13.9         15.3
30-50...........................................          5.4          6.5          7.7          9.2         11.5         14.3         19.1         20.9
50-75...........................................          6.6          7.9          9.4         11.1         13.9         18.0         23.8         26.2
75-100..........................................          7.7          9.2         10.9         12.8         17.2         21.1         27.2         30.1
100-150.........................................          9.4         11.1         13.2         16.5         21.4         25.3         32.3         35.5
150-200.........................................         10.9         12.7         15.8         19.5         24.7         28.5         36.4         39.5
200-250.........................................         12.1         14.3         18.2         22.0         27.3         31.2         39.5         42.5
250-300.........................................         13.9         16.4         20.0         23.9         29.4         35.4         42.1         45.9
300-350.........................................         15.3         17.9         21.7         25.7         31.4         37.6         44.5         48.4
350-400.........................................         16.6         19.3         23.2         27.3         33.3         39.7         46.9         51.0
400-450.........................................         17.6         20.4         24.4         28.7         35.1         41.9         49.4         53.8
450-500.........................................         18.3         21.4         25.5         30.1         36.7         43.7         51.4         55.9
500-550.........................................         18.9         21.8         26.3         31.0         37.9         45.3         53.3         57.5
--------------------------------------------------------------------------------------------------------------------------------------------------------


--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                Fixed White space devices
---------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                  Required separation in kilometers from adjacent channel digital or analog TV  (full
                                                                                        service or low power) protected contour*
 Antenna height above average  terrain of unlicensed devices  ------------------------------------------------------------------------------------------
                           (meters)                            20 dBm (100  24 dBm (250  28 dBm (625     32 dBm     36 dBm (4    40 dBm (10   42 dBm (16
                                                                   mW)          mW)          mW)       (1,600 mW)       W)           W)           W)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Less than 3..................................................          0.1          0.1          0.1          0.1          0.2          0.2          0.3
3-10.........................................................          0.1          0.2          0.2          0.2          0.3          0.4          0.5
10-30........................................................          0.2          0.3          0.3          0.4          0.5          0.6          0.7
30-50........................................................          0.3          0.3          0.4          0.5          0.7          0.8          1.0
50-75........................................................          0.3          0.4          0.5          0.7          0.8          0.9          1.0
75-100.......................................................          0.4          0.5          0.6          0.8          1.0          1.1          1.3
100-150......................................................          0.5          0.6          0.8          0.9          1.2          1.3          1.5
150-200......................................................          0.5          0.7          0.9          1.1          1.4          1.5          1.7
200-250......................................................          0.6          0.8          1.0          1.2          1.5          1.7          1.9
250-300......................................................          0.7          0.8          1.0          1.3          1.6          2.1          2.3
300-350......................................................          0.7          0.9          1.1          1.4          1.8          2.2          2.4
350-400......................................................          0.8          1.0          1.2          1.5          1.9          2.4          2.7
400-450......................................................          0.8          1.0          1.3          1.6          2.1          2.6          2.9
450-500......................................................          0.8          1.1          1.4          1.7          2.1          2.7          2.9
500-550......................................................          0.9          1.2          1.5          1.8          2.2          2.8          3.0
--------------------------------------------------------------------------------------------------------------------------------------------------------

    30. The Commission declines at this time to alter the current 
method of protecting TV stations (i.e., minimum separation distances 
outside of defined protected contours) by changing to a terrain-based 
model as requested by some parties. The Commission did not propose to 
make this change in the NPRM. However, it recognizes parties' arguments 
that more sophisticated propagation models could possibly identify 
unused TV spectrum more accurately than the current contour-based model 
while still protecting TV service from harmful interference.
    31. Receive sites of TV translators, low power TV stations, Class A 
TV stations, MVPDs, and BAS facilities. In the NPRM, the Commission 
proposed to modify the keyhole-shaped exclusion zone around receive 
sites where white space devices may not operate. For fixed devices 
operating with an EIRP of greater than 10 watts, the Commission 
proposed to increase the minimum required separation distance from the 
receive site from 10.2 kilometers to 16.6 kilometers co-channel, and 
from 2.5 kilometers to 3.5 kilometers adjacent channel, over an arc of 
more than 30 degrees outside the main lobe of the receive 
antenna. The Commission proposed no changes to the minimum required 
separation distances from a receive site (80 kilometers co-channel and 
20 kilometers adjacent channel) within a 30 degrees arc in 
the main lobe of the receive antenna. No party argued that the proposed 
changes are insufficient to protect these receive sites from higher 
power white space device operation. As such, the Commission adopts its 
proposal.
    32. Private land mobile radio services and commercial mobile radio 
services (PLMRS/CMRS). The Commission proposed to increase the minimum 
required separation distances between fixed white space devices 
operating at greater than 10 watts EIRP and PLMRS/CMRS operations, 
which include public safety operations, on TV channels 14-20 (the T-
Band) in 11 major markets and in some additional areas under rule 
waivers. In the 11 markets where PLMRS/CMRS stations are permitted to 
operate in the TV bands, the Commission proposed to increase the 
minimum required separation distance beyond the defined city center 
coordinates from 136 kilometers to 139.2 kilometers co-channel, and 
from 131.5 kilometers to 132.2 kilometers adjacent channel. The 
Commission also proposed to increase the minimum separation distance 
from PLMRS/CMRS base stations operating under a waiver outside the 11 
markets from 56 kilometers to 59.2 kilometers co-channel and from 51.3 
kilometers to 52.2 kilometers adjacent channel. NPSTC argues that these 
proposed separation

[[Page 2284]]

distances need to be increased to reflect both the higher power and the 
higher HAAT proposed and provided a table of recommended separation 
distances.
    33. The Commission will increase the proposed separation distances 
between PLMRS/CMRS operations and fixed white space devices operating 
with an HAAT of greater than 250 meters to properly reflect the 
increase in HAAT of up to 500 meters the Commission is permitting in 
``less congested'' areas. No party objected to NPSTC's suggested 
separation distances, and the Commission believes that they will 
adequately protect PLMRS/CMRS operations from white space device 
operations at the higher power and HAAT levels the Commission is 
permitting. However, the Commission also recognizes Microsoft's 
suggestion that if the separation distances to protect PLMRS/CMRS are 
increased, they should be provided on a stepped basis, rather than 
based on the assumption that all white space devices operate at a 
maximum HAAT of 500 meters, to avoid needlessly making areas off limits 
to white space devices. The Commission agrees that this approach will 
maximize the amount of spectrum available for white space devices while 
protecting the PLMRS/CMRS from white space devices operating at higher 
power and antenna heights. The Commission will therefore specify 
protection distances for the PLMRS/CMRS for three power level ranges 
(i.e., up to 4 watts EIRP, greater than 4 and up to 10 watts EIRP, and 
greater than 10 watts and up to 16 watts EIRP), and for two ranges of 
HAAT (i.e., up to 250 meters, and greater than 250 meters and up to 500 
meters). The Commission adopts the proposed separation distances for 
the lower HAAT range, and NPSTC's suggested separation distances for 
the higher HAAT range.
    34. In the T-Band NPRM (85 FR 46047, July 31, 2020), the Commission 
sought comment on reallocating T-Band spectrum, assigning new licenses 
by auction for that spectrum in each of the 11 markets areas where the 
PLMRS/CMRS currently operates, and relocating ``public safety 
eligibles'' from this band. The Commission proposed rules that would 
allow for flexible use in the auctioned T-Band, including wireless use, 
and also proposed to permit broadcast operations. If the Commission 
adopts rules to allow new types of licensed services in the T-Band, 
white space devices would operate on a non-interference basis to them 
as they do with the current PLMRS/CMRS services in the bands. To the 
extent that any future services in the T-Band have a different 
potential for receiving interference than the PLMRS/CMRS, the 
Commission may need to adjust the minimum separation distances that 
white space devices must meet.
    35. The following two tables show the minimum required separation 
distances from the 11 metropolitan areas where the PLMRS/CMRS can 
operate in the TV bands, and from PLMRS/CMRS operations authorized 
under waivers of the rules.

----------------------------------------------------------------------------------------------------------------
                                          Required separation in kilometers from the areas specified in Sec.
                                                              90.303(a)  of this chapter
                                     ---------------------------------------------------------------------------
White space device transmitter power          Co-channel operation               Adjacent channel operation
                                     ---------------------------------------------------------------------------
                                       Up to 250 meters   Greater than 250   Up to 250 meters   Greater than 250
                                             HAAT           meters HAAT            HAAT           meters HAAT
----------------------------------------------------------------------------------------------------------------
Up to 4 watts EIRP..................              134.0              158.0              131.0              155.4
Greater than 4 watts and up to 10                 136.0              169.8              131.5              166.0
 watts EIRP.........................
Greater than 10 watts and up to 16                139.2              171.1              132.2              166.2
 watts EIRP.........................
----------------------------------------------------------------------------------------------------------------


----------------------------------------------------------------------------------------------------------------
                                        Required separation in kilometers from operations authorized by waiver
                                          outside of the areas specified in Sec.   90.303(a) of this chapter
                                     ---------------------------------------------------------------------------
White space device transmitter power          Co-channel operation               Adjacent channel operation
                                     ---------------------------------------------------------------------------
                                       Up to 250 meters   Greater than 250   Up to 250 meters   Greater than 250
                                             HAAT           meters HAAT            HAAT           meters HAAT
----------------------------------------------------------------------------------------------------------------
Up to 4 watts EIRP..................               54.0               78.0               51.0               75.4
Greater than 4 watts and up to 10                  56.0               89.8               51.5               86.0
 watts EIRP.........................
Greater than 10 watts and up to 16                 59.2               91.1               52.2               86.2
 watts EIRP.........................
----------------------------------------------------------------------------------------------------------------

    36. LPAS stations, including licensed wireless microphones. The 
Commission proposed an increase from one kilometer to 1.3 kilometers in 
the minimum required separation distance between fixed white space 
devices operating with greater than 10 watts EIRP and registered 
licensed wireless microphones. Sennheiser and Shure argue that the 
proposed separation distances to protect licensed wireless microphones 
should be increased, and they provided a table of recommended 
distances. Microsoft, however, argues that there is no need to increase 
the separation distances in the manner Sennheiser and Shure proposes.
    37. The Commission increases the minimum required separation 
distance between fixed white space devices operating with a power level 
greater than 10 watts EIRP and licensed wireless microphones as 
proposed in the NPRM. This will provide the same level of protection to 
wireless microphones as the current rules based on a conservative free 
space propagation model.
    38. The Commission declines to require even greater separation 
distances from wireless microphones as suggested by Sennheiser and 
Shure. The Commission first notes that no party challenged its 2015 
decision to increase the maximum power for fixed white space devices to 
10 watts in ``less congested'' areas without also increasing the one-
kilometer separation distance from wireless microphones. The Commission 
also notes that it did not propose to increase the existing one-
kilometer separation distance in the NPRM, and it believes that it 
would be inappropriate in these circumstances to take such an action 
based on this record. As a separate and independent basis for its 
decision, the Commission does not believe that Sennheiser's suggested 
increased separation distances for higher HAAT operations are 
appropriate. HAAT is defined and calculated along radials at a distance 
of three to 16 kilometers from a transmitter

[[Page 2285]]

site, i.e., HAAT is not defined for distances less than three 
kilometers. The majority of Sennheiser's suggested separation distances 
are at distances of less than three kilometers, which is shorter than 
the distance (3-16 kilometers) over which HAAT is defined. Moreover, 
because higher HAAT operations are expected to be coupled with higher 
power operations to reach greater distances, the rules require use of a 
directional antenna which will both direct energy towards the horizon 
(rather than downward) and minimize the energy outside the main beam. 
This, in effect, will minimize white space signal strength at nearby 
wireless microphones. Thus, the Commission does not believe there would 
be any benefit to wireless microphones by increasing the separation 
distance requirements. In fact, the directional antenna requirement may 
actually provide a better operating environment for wireless 
microphones in such situations.

Definition of ``Less Congested'' Area

    39. In the NPRM, the Commission sought comment on whether any 
changes are necessary to the definition of ``less congested'' area 
given that many of the proposals were limited to those areas. ``Less 
congested'' locations are typically rural or semi-rural areas and are 
defined as those where at least half of the TV channels within a 
device's particular TV sub-band of operation (i.e., the low VHF 
(channels 2-6), the high VHF (channels 7-13), or the UHF (channels 14-
36) band) are unused for broadcast and other protected services and are 
available for white space device use. The Commission sought comment on 
whether the current definition is still appropriate, and if not, what 
the appropriate metric for defining ``less congested'' area would be. 
In addition, because the number of vacant channels at a location can 
vary based on the EIRP and HAAT of a white space device, the Commission 
sought comment on whether it should define vacant channels depending on 
particular antenna height and power level.
    40. The Commission will continue to define ``less congested'' areas 
as those where at least half of the TV channels in the bands that will 
continue to be allocated and assigned only for broadcast service are 
unused for broadcast and other protected services and available for 
white space device use. Areas where the spectrum is less congested 
generally correspond to rural and unserved areas that will benefit from 
improved broadband coverage, and the current definition provides a 
simple way for the white space database to identify these areas where 
the Commission permits higher power and antenna heights to improve 
broadband coverage. In addition, in areas where the spectrum is less 
congested, there is less likelihood that white space devices operating 
at higher power and antenna heights will cause interference to 
protected services in the TV band. The Commission agrees with wireless 
microphone operators that the current definition should be retained 
because spectrum is a scarce resource and it is therefore appropriate 
to base the definition on how much spectrum is available at a given 
location rather than population density.
    41. Shure states that to the extent there are concerns about 
accounting for the number of vacant channels with variations in white 
space device EIRP and HAAT, the Commission can address this by defining 
vacant channels at a particular antenna height and power level. While 
no party suggested a specific white space device EIRP and HAAT that 
should be used in determining TV channel availability, the Commission 
notes that it stated in the 2015 White Spaces Order that vacant 
channels would be defined as those available for fixed white space 
devices operating with an EIRP of 40 milliwatts and an HAAT of 3 
meters, although it did not codify this decision. Since no party 
suggested specific criteria for determining channel availability in 
response to the NPRM, the Commission retains and codifies its 2015 
decision by specifying the power and antenna heights used to determine 
TV channel availability in the definition of ``less congested'' area in 
Sec.  15.703.
    42. In addition, the Commission clarifies the definition of ``less 
congested'' area by codifying its decision in the 2015 White Spaces 
Order that ``less congested'' areas are calculated by the white space 
database in the three TV bands separately: The low VHF band (channels 
2-6), the high VHF band (channels 7-13) and the UHF band (channels 14-
36). The Commission declines to significantly modify the definition of 
``less congested'' areas as suggested by some parties. For the reasons 
described above, the Commission finds that the current definition, with 
certain modifications, is the appropriate metric for determining which 
areas are ``less congested''. The Commission also declines Dynamic 
Spectrum Alliance's request to modify the definition of ``less 
congested'' area to consider all TV bands together (low VHF, high VHF 
and UHF) in determining vacant channel availability and whether an area 
qualifies as less congested. The higher frequency UHF TV band (470-608 
MHz) is more heavily used by TV stations, white space devices, and 
wireless microphones than the lower frequency VHF TV bands (54-72 MHz, 
76-88 MHz and 174-216 MHz) due to factors such as the shorter radio 
wavelengths and smaller required antennas. Moreover, because the TV 
bands are not contiguous, determining ``less congested'' areas based on 
considering all TV bands together may not produce a result that is 
representative of the actual spectrum congestion in the specific band 
where a white space device will operate. Thus, the Commission believes 
it is appropriate to continue determining ``less congested'' areas on a 
band-by-band approach, rather than by considering all TV bands 
together.

Higher Power Mobile Operation Within ``Geo-Fenced'' Areas

    43. The white space rules permit two general classes of devices: 
Fixed and personal/portable, with personal/portable devices further 
subdivided into two types: Mode I and Mode II. Fixed and Mode II 
personal/portable devices must incorporate a geo-location capability to 
determine their coordinates and access a database to determine the 
available channels at those specific coordinates. The current rules 
permit fixed white space devices to operate with up to 4 watts EIRP 
generally, and up to 10 watts in ``less congested'' areas, which the 
Commission is increasing to 16 watts as discussed above. Personal/
portable devices may operate with a maximum EIRP of 100 milliwatts. A 
Mode II personal/portable device must re-check its coordinates every 60 
seconds and contact the database for an updated list of available 
channels if it changes location by more than 100 meters. Additionally, 
Mode II personal/portable devices may load channel availability 
information for multiple locations from the white space database and 
use that information to define a geographic area within which it can 
operate on a mobile basis (on the same available channels at all 
locations within that geographic area); the device must contact the 
database again, however, if it moves beyond the boundary of the area 
where the channel availability information is valid. No device 
manufacturers or database systems have yet implemented this provision.
    44. In the NPRM, the Commission proposed to allow white space 
devices to operate on TV channels 2-35 on mobile platforms within geo-
fenced areas at higher power levels than the rules currently permit for 
personal/

[[Page 2286]]

portable devices, and proposed to limit such operations to ``less 
congested'' areas to limit their potential for causing harmful 
interference. The Commission proposed to permit a higher power Mode II 
white space device installed on a movable platform to load channel 
availability information for multiple locations in the vicinity of its 
current location and to use that information to define a geo-fenced 
area within which it can operate on the same available channels at all 
locations. The Commission also proposed to require that the white space 
device's location be checked at least once every 60 seconds while in 
operation (unless in ``sleep'' mode). The Commission further proposed 
that a device may not use channel availability information for multiple 
locations if or when it moves closer than 1.6 kilometers to the 
boundary of the geo-fenced area in which the device operates, or at any 
point outside that boundary; this requirement would ensure that a 
device moving at 60 miles per hour (1.6 kilometers per minute) does not 
cross outside the boundary between device re-checks of its location. 
Additionally, the Commission proposed to prohibit operation on board 
aircraft or satellites to limit the range at which harmful interference 
could occur.
    45. The Commission sought comment on a number of equipment issues 
for higher power geo-fenced mobile operations, including whether to 
permit fixed devices to operate on mobile platforms, the antenna and 
equipment authorization requirements that should apply, and whether the 
Commission should establish a new class of higher power mobile device 
to distinguish such devices from personal/portable white space devices. 
The Commission also sought comment on other requirements for higher 
power mobile white space devices, including whether to place 
limitations on the size of the area over which a geo-fenced mobile 
device could operate, the appropriate maximum power, whether there is a 
need to specify how information on an area will be provided to the 
white space database, and any other safeguards needed to ensure that 
higher power mobile devices do not cause harmful interference to 
protected operations. The Commission further sought comment on whether 
there is a need to prohibit operation on other mobile platforms such as 
trains and boats.
    46. The Commission permits the operation of higher power mobile 
devices within defined geo-fenced areas in ``less congested'' areas, as 
proposed in the NPRM. A number of parties support this change, stating 
that it will benefit Americans in rural and underserved areas by 
permitting new agricultural applications and enabling broadband 
communications with moving vehicles such as school buses. The 
Commission implements this change by establishing a new class of higher 
power mobile white space device, rather than by modifying the Mode II 
personal/portable device rules as proposed in the NPRM and supported by 
Shure and Sennheiser, or by allowing fixed devices to operate on mobile 
platforms as suggested by Microsoft in its petition and supported by 
RED Technologies. The Commission agrees with commenters that 
establishing a new class of mobile white space device would be simpler 
than modifying the Mode II personal/portable device rules to permit 
higher power operation, and that this approach is more congruous than 
an approach providing for a fixed device on mobile platform as 
initially suggested by Microsoft. The Commission uses the term ``mobile 
device'' to refer to this class of white space devices to distinguish 
them from personal/portable white space devices. As suggested by Shure, 
the Commission is clearly indicating in the rules that mobile devices 
may operate only in ``less congested'' areas by adding this requirement 
to the definition of ``mobile white space device''.
    47. The Commission permits mobile devices to operate at the same 
radiated power level permitted for fixed devices in ``less congested'' 
areas, i.e., up to 16 watts EIRP. This power level will enable the 
provision of new types of mobile broadband services in rural and other 
unserved areas. Because the Commission is permitting power levels that 
are the same as fixed devices, it believes that many of the technical 
requirements that apply to fixed devices are also appropriate for the 
new class of mobile white space devices. Accordingly, the Commission 
requires mobile devices to comply with the same transmitter power 
limits as fixed devices, including maximum in-band power, adjacent 
channel emissions, power spectral density, and out-of-band emissions, 
as well as require them to meet the same antenna gain requirements as 
fixed devices. Under these requirements, a mobile device will be 
permitted to operate with a maximum transmitter power output of one 
watt, and can use an antenna with a gain of up to 12 dBi to achieve an 
EIRP of 16 watts. If the maximum gain of the antenna exceeds 12 dBi, 
then the transmitter power must be reduced by the same amount in dB 
that the antenna gain exceeds 12 dBi. Because mobile devices change 
direction as they travel, the Commission permits the use of 
electrically steerable directional antennas to help enable mobile 
devices to remain in contact with their associated base unit or another 
mobile device.
    48. The white space database will determine channel availability 
over a defined geo-fenced area where a mobile device will operate. In 
order to provide flexibility for manufacturers and mobile device 
operators, the Commission does not specify how the boundaries of an 
area are entered into and stored within the white space database or a 
mobile device. The Commission does, however, require that both the 
white space database and mobile device contain the same boundary 
information. This requirement will ensure that mobile devices operate 
only where the database has determined available channels. Because 
mobile devices will operate at the same maximum power level as fixed 
devices, the Commission requires that the database use the same minimum 
required separation distances from protected services in the TV bands 
as fixed devices in determining available channels. This includes all 
protected services, including the PLMRS/CMRS, as noted by NPSTC. For 
simplicity of operation, the Commission requires that any channel 
identified by the database as available within the geo-fenced area must 
be available at the same power level over an entire geo-fenced area.
    49. The Commission recognizes that there are some complexities in 
determining the available channels over a contiguous geo-fenced area. 
The current white space database system determines channel availability 
at discrete locations since it was designed to implement rules that 
require devices to determine their geographic coordinates at a single 
location and submit those coordinates to the database when requesting a 
list of available channels. The database system would have to use a 
modified methodology for determining available channels over a geo-
fenced area. For example, it could divide the area into cells, e.g., 
100 by 100-meters, and determine channel availability within each cell. 
The Commission will not prescribe the exact method that database 
administrators must use to determine channel availability within geo-
fenced areas, but mobile white space devices must comply with the 
minimum required separation distances from protected services at any 
point within a geo-fenced area. The white space database will have to 
consider a mobile device's HAAT in determining available channels and 
consider any variation in

[[Page 2287]]

HAAT over a geo-fenced area to determine whether a channel is available 
over the entire area. To simplify calculations, the Commission permits 
the database to use only the highest, i.e., worst case, HAAT within a 
geo-fenced area in determining channel availability rather than having 
to calculate the HAAT at each location. The Commission sees no reason 
to limit the size of the geo-fenced area since mobile devices will only 
be permitted to operate in areas where the spectrum is ``less 
congested.'' The requirement that a channel must be available over an 
entire geo-fenced area will tend to preclude extremely large areas 
since there is less likelihood that the same TV channel will be vacant 
over a very large contiguous area.
    50. Because a mobile device must be able to accurately determine 
its location, the Commission requires that a mobile device comply with 
similar geo-location requirements to fixed devices. Specifically, the 
Commission requires that a mobile device incorporate a geo-location 
capability that is capable of determining its location and geo-location 
uncertainty (expressed in meters), with a confidence level of 95%. To 
provide flexibility in the design of mobile devices, the Commission 
permits the use of a remote geo-location unit as the rules permit for 
fixed devices, provided the remote unit is located on the same moveable 
platform as the mobile device, e.g., bus or tractor. To ensure that a 
mobile device is capable of determining whether it is within a geo-
fenced area, the Commission requires that a mobile device have the 
ability to store information on the boundaries of a geo-fenced area in 
which it will operate.
    51. While the Commission proposed in the NPRM to require a mobile 
white space device operating within a geo-fenced area to re-check its 
geographic coordinates at least once every 60 seconds and to cease 
operation if it travels closer than 1.6 kilometers to the edge of the 
geo-fenced area or is outside the boundary of the area, the Commission 
agrees with Shure that this proposed distance should be slightly 
increased to account for vehicles traveling at allowable highway speed 
limits. The proposed buffer requirement was intended to ensure that a 
mobile white space device traveling at 60 miles per hour (1.6 
kilometers per minute) does not cross outside the geo-fenced area 
between location checks. However, the Commission recognizes Shure's 
argument that many vehicles travel faster than this speed. The 
Commission disagrees with Shure's contention that a 2.7-kilometer 
buffer is necessary because that corresponds to an atypical vehicle 
speed of more than 100 miles per hour, but note that Shure believes an 
increase in the buffer zone size to 1.9 kilometers (corresponding to a 
vehicle speed of just over 70 miles per hour) would be an improvement 
over the Commission's proposal of 1.6 kilometers. Accordingly, the 
Commission adopts the proposed location re-check interval of 60 
seconds, but increases the size of the geo-fenced area buffer from the 
proposed 1.6 kilometers to 1.9 kilometers.
    52. The Commission limits operation of mobile devices to ``less 
congested'' areas as proposed in the NPRM. The Commission believes that 
the primary applications for mobile devices will be in more rural 
areas, and limiting the new class of higher power mobile device to 
areas with more available spectrum will limit the likelihood of 
interference to authorized services in the TV bands as well as enable 
all unlicensed devices, including other white space devices and 
unlicensed wireless microphones, to have an opportunity to access 
spectrum in the TV bands. To limit the distance at which mobile devices 
could cause interference to authorized services, the Commission 
prohibits their operation on satellites and aircraft as proposed in the 
NPRM. This prohibition of operation on aircraft will include unmanned 
aerial vehicles (e.g., drones).
    53. The Commission sees no reason to specially limit the maximum 
height above ground level for mobile devices or to preclude operation 
on cranes or bucket trucks as suggested by NAB and others. The 
Commission requires a mobile device to report its height above ground 
to the white space database as is required for fixed devices, and the 
database will take the antenna height above ground into consideration 
when calculating a mobile device's HAAT and the available channels 
within a geo-fenced area. Thus, a higher antenna height above ground 
will not increase the likelihood of interference to authorized services 
as parties suggest. The Commissions also sees no reason to make any 
special requirements regarding the directivity of mobile device 
antennas, i.e., larger buffer zones, as suggested by Shure. The 
required size of the buffer zone is a function of a mobile device's 
speed and re-check interval and is independent of the power level used.

Narrowband IoT Operations

    54. Under current rules, fixed white space devices operating with 4 
watts or greater EIRP must comply with a power spectral density (PSD) 
limit of 12.6 dBm per 100 kilohertz, which limits total conducted power 
within any 6-megahertz television channel to 30 dBm. The PSD limit is 
proportionally lower for devices operating at lower EIRP levels. The 
Commission established PSD limits to prevent multiple white space 
devices from simultaneously operating at the maximum allowable power 
with transmit bandwidths of less than six megahertz within a single 
television channel, which would result in a total transmitted power 
within that channel significantly greater than the limit. The PSD 
limits were calculated based upon a single white space device spreading 
its energy uniformly across a 6-megahertz television channel bandwidth, 
excluding 250 kilohertz near each channel edge for roll-off, and serve 
to limit the maximum power of white space devices with bandwidths of 
less than 6-megahertz.
    55. In the NPRM, the Commission proposed changes to the white space 
rules to facilitate narrowband (e.g., 100 kilohertz) IoT device 
deployment on TV channels 2-35. The proposed rules would permit white 
space devices to operate with narrowband carriers rather than having to 
spread all of their energy across a six megahertz channel, and are 
designed to ensure that narrowband white space devices have no greater 
interference potential than wider bandwidth devices operating under the 
current rules. Specifically, the Commission proposed to define a 
``narrowband white space device'' as a type of fixed or personal/
portable white space device operating in a bandwidth of no greater than 
100 kilohertz. The Commission also proposed that narrowband white space 
devices be client devices that communicate with a fixed or Mode II 
master device that contacts the white space database to obtain a list 
of available channels and operating powers at its location. In this 
connection, the Commission also sought comment on whether the proposed 
definition for narrowband white space device is appropriate for the 
intended IoT applications.
    56. The Commission proposed to permit narrowband white space 
devices to operate with the same conducted PSD limit, adjacent channel 
emission limits, and antenna gain requirements as 4-watt fixed devices. 
To ensure that the total energy in a single TV channel does not cause 
harmful interference, the Commission proposed to limit each transmitter 
to transmissions totaling no more than 10 seconds per hour. The 
Commission further proposed to require narrowband devices to use a 
channel plan that limits total transmitted power

[[Page 2288]]

in a six-megahertz channel to no higher than the existing limits for a 
four-watt EIRP broadband white space device. Although the Commission 
declined to propose requiring narrowband devices to use a listen-
before-talk mechanism, it nonetheless sought comment on whether one 
would be necessary to prevent harmful interference to protected 
services in the TV bands. The Commission also sought comment on whether 
there is a need to increase the minimum separation distances from co-
channel and adjacent channel TV station contours as the rules require 
for personal/portable devices operating as clients.
    57. The Commission modifies the rules to facilitate the development 
of new and innovative narrowband IoT devices in the TV bands. 
Specifically, the Commission establishes a new class of ``narrowband 
white space device,'' which it defines as a type of fixed or personal/
portable white space device operating in a bandwidth of no greater than 
100 kilohertz. A number of parties support the proposals to modify the 
white space rules to permit narrowband IoT operations. In response to 
specific comment sought on the definition of a narrowband white space 
device, the Commission expands that definition to include master 
devices as well as clients. This change is suggested by Dynamic 
Spectrum Alliance and Microsoft to enable greater flexibility in the 
design of IoT networks. No party opposed this change. A narrowband 
device that operates as a client must communicate with a master device 
that contacts the white space database to obtain a list of available 
channels and operating powers at its location, while a narrowband 
device that acts as a master must incorporate a geo-location mechanism 
and be capable of obtaining lists of available channels and operating 
powers from the white space database. The Commission permits all types 
of white space devices that incorporate geo-location and have database 
access (fixed, Mode II, mobile, and narrowband) to act as a master 
device to a narrowband client device. TV band frequencies are better 
able to penetrate foliage and other obstacles than higher frequencies, 
so this action will permit the development of IoT devices with improved 
transmission range.
    58. As proposed in the NPRM, the Commission permits narrowband 
white space devices to operate with a conducted PSD of up to 12.6 dBm/
100 kilohertz, which is the same maximum level permitted for fixed 
devices, and require narrowband devices to comply with the same maximum 
antenna gain requirements as fixed devices, i.e., a maximum antenna 
gain of 6 dBi with no reduction in transmitter conducted power, or 
higher antenna gain if the conducted power is proportionally reduced. 
The Commission also requires narrowband white space devices to comply 
with an emission limit of -42.8 dBm into adjacent channels, i.e., 
outside of the 6-megahertz channel in which they operate. These 
requirements will permit a white space device to operate with a single 
or several narrowband carriers rather than having to spread all of its 
energy across a six megahertz channel while ensuring that narrowband 
white space devices have no greater interference potential than wider 
bandwidth devices operating under the current rules. To prevent 
narrowband devices from being used for data intensive applications and 
to limit the potential for these devices to cause harmful interference, 
the Commission limits transmissions on each narrowband channel to a 
total of 36 seconds per hour, as suggested by Dynamic Spectrum Alliance 
and Microsoft, i.e., a 1% duty cycle.
    59. The Commission will not, however, increase this transmission 
time limit for narrowband devices to allow for signaling overhead as 
suggested by Microsoft. Microsoft has not indicated how much additional 
transmission time would be necessary for this overhead. Further, to the 
extent that a narrowband device needs additional transmission time for 
functions such as contacting a white space database to obtain a list of 
available channels, there appear to be ways to perform these functions 
while still complying with the 36 second per hour per narrowband 
channel limit. For example, under the rules the Commission is adopting 
there will be up to 55 narrowband channels within one six-megahertz TV 
channel, and a device could use one or more of these narrowband 
channels for signaling purposes. In addition, any overhead associated 
with contacting the database could be accomplished by other means, such 
as a non-narrowband white space channel, Wi-Fi, a fixed link, or a 
fiber connection.
    60. The Commission also requires narrowband devices to use the 
proposed channel plan that limits total transmitted power in a six-
megahertz channel to no higher than the existing limits for a four-watt 
EIRP broadband white space device. This channel plan requires 
narrowband white space devices to operate at least 250 kilohertz from 
the edge of a six-megahertz TV channel, unless the adjacent channel is 
also vacant, and requires narrowband white space devices to operate 
only on channels centered at integral multiples of 100 kilohertz 
between the 250 kilohertz guard bands. The net effect of these 
requirements is that narrowband devices will be permitted to operate 
within 55 possible 100-kilohertz channels in the center 5.5 megahertz 
of each six-megahertz channel. Even in the event that all 55 narrowband 
channels within a six-megahertz channel were occupied simultaneously by 
devices transmitting at maximum power, the total conducted and radiated 
power within that six-megahertz channel would be no greater than for a 
fixed device operating with one-watt conducted power and 4 watts EIRP. 
Because of the transmission time limit of thirty-six seconds per hour 
(a one-percent duty cycle), the interference potential of these 
narrowband white space devices will actually be significantly less than 
four-watt EIRP fixed devices in most cases since it is extremely 
unlikely that devices would transmit at maximum power on all 55 
narrowband channels simultaneously, and even if they did, that would 
occur for no more than 36 seconds per hour.
    61. The Commission is not limiting operation of narrowband devices 
to ``less congested'' areas as suggested by wireless microphone 
interests. Since narrowband devices will operate under control of a 
master device that accesses a white space database to determine 
available channels at its location, narrowband devices will not be 
permitted to operate on the channels at locations where registered 
licensed wireless microphones operate. Additionally, unlicensed 
wireless microphones and white space devices must already share 
spectrum with fixed white space devices operating at up to 4 watts EIRP 
in areas that do not meet the definition of ``less congested.'' Even 
under worst-case conditions, narrowband devices will have no greater 
interference potential than four-watt fixed devices and will have a 
significantly lower interference potential in the vast majority of 
cases. For these reasons, the Commission does not agree with RADWIN 
that a proliferation of narrowband devices will prevent spectrum use 
for internet access.
    62. The Commission declines to allow a greater transmission duty 
cycle for narrowband devices used only by public safety entities as 
requested by NPSTC. While NPSTC does not indicate how much it wants the 
limit increased, the higher transmit duty cycle the Commission is 
permitting will benefit all narrowband device applications, including 
those used by public safety entities. Allowing different technical

[[Page 2289]]

requirements for public safety entities would complicate equipment 
certification and would be difficult to enforce since there could be 
multiple versions of the same device, some of which could be legally 
used only by specific types of entities. It is not clear how the 
Commission could ensure that devices approved for use only by public 
safety entities would be marketed to, and operated by, only those 
entities.

Higher Power on Adjacent Channels

    63. White space devices must generally operate outside the 
protected contours of adjacent channel TV stations because a strong 
signal on an adjacent channel can cause interference to the reception 
of a channel being viewed. The general requirement that white space 
devices avoid operation within the protected contours of a station 
operating on an adjacent channel means that, as a practical matter, a 
white space device may operate only at locations where there are three 
contiguous vacant channels, i.e., the channel used by the white space 
device plus both adjacent channels. The Commission's rules do, however, 
provide two exceptions that permit white space device operations at 
lower power levels when adjacent channels are occupied, based upon the 
shorter distances at which interference to adjacent channel TV stations 
could occur. First, both fixed and personal/portable white space 
devices may operate at up to 40 milliwatts EIRP at locations where both 
adjacent channels are occupied. Second, fixed white space devices may 
operate within the protected contour of adjacent channel TV stations 
with a power level of 100 milliwatts EIRP when the white space device 
operates in a six-megahertz band centered on the boundary of two 
contiguous vacant channels, i.e., 50 milliwatts EIRP within a three-
megahertz band in each channel.
    64. In the NPRM, the Commission sought comment on whether it could 
permit white space devices to operate at higher power levels than the 
rules currently permit when adjacent TV channels are occupied. In 
particular, the Commission sought comment on methods that could be used 
to determine the locations where it could permit higher power 
unlicensed operations on adjacent channels, and if so, what specific 
technical parameters would need to be considered or specified in such 
calculations. The Commission also sought comment on whether there is 
any information available on adjacent channel selectivity and 
interference rejection capabilities of next-generation TV receivers, 
such as manufacturers' specifications or actual measurement results, 
and whether there is any indication that next-generation TV receivers 
will have better adjacent channel interference rejection than current 
receivers.
    65. The Commission does not increase the maximum permissible power 
for white space devices operating inside the protected contour of 
adjacent channel TV stations at this time. As an initial matter, the 
Commission does not at this time have sufficient evidence in the record 
on which to change the manner of protecting broadcast services to a 
terrain-based model, as Microsoft and others suggest. Microsoft argues 
that the Commission should permit white space device operation within 
the protected contour of adjacent channel TV stations at higher power 
levels than the rules currently permit. In so doing, Microsoft supplied 
a test report on the results of laboratory measurements of current 
model ATSC 1.0 TV receivers and next generation ATSC 3.0 TV receivers 
that it claims shows higher power adjacent channel operation is 
possible because these TV receivers have better selectivity than the 
Commission assumed in developing the current power limits and because 
the use of terrain-based propagation models (e.g., Longley-Rice) can 
provide a more accurate determination of where higher power adjacent 
channel white space device operation can be permitted without causing 
harmful interference. Microsoft also supplied a test report on field 
measurements conducted with Ark Multicasting, a lower power TV network 
operator, that it claims validates its laboratory measurements and 
demonstrates that for the given parameters (e.g., fixed white space 
device EIRP and antenna pattern, DTV transmitter characteristics, 
adjacent channel selectivity of the newer model TV receivers with 
integral display tested, and distance between the DTV transmitter and 
the TV receiver) a white space device can operate within the protected 
contour on a first adjacent channel at higher powers than currently 
allowed.
    66. But while data supplied by Microsoft shows that some newer 
model TV receivers have better adjacent channel selectivity than the -
33 dB D/U ratio the Commission assumed when it adopted the power limits 
for white space devices operating inside the protected contour of 
adjacent channel TV stations, NAB disputes Microsoft's analysis, 
arguing that the TV receivers it used are not representative of the 
currently installed consumer base. Microsoft's report shows that the 
average adjacent channel selectivity of tested ATSC 1.0 receivers is 
better than the value the Commission assumed, and that ATSC 3.0 
receivers have a selectivity 10 dB better than that of ATSC 1.0 
receivers at lower order modulations and similar to ATSC 1.0 receivers 
at higher order modulations. In addition, the report shows that 
receiver adjacent channel selectivity improves by 5.7 dB on average 
when a white space device operates at a 3 megahertz offset from a TV 
channel edge.
    67. The improved receiver selectivity shown in Microsoft's testing 
could allow white space devices to operate within adjacent channel 
protected contours at higher power levels than the rules currently 
permit without increasing the potential for interference to TV 
reception. The Commission recognizes, however, NAB's concern that 
Microsoft's testing was performed with a limited number of TV receivers 
which may not be representative of the currently installed base. The 
Commission encourages Microsoft and other parties to continue studies 
and white space device and TV receiver testing to determine whether or 
how the Commission can permit higher power for white space devices 
without causing harmful interference to TV reception. The Commission 
welcomes interested parties to file a petition in the future when this 
work has been done.

Other Matters

    68. Directional antennas. Broadband Connects America Coalition, 
Public Interest Spectrum Coalition, and WISPA request that the white 
space database be allowed to consider the directivity of white space 
device transmit antennas in determining channel availability for white 
space devices. NAB opposes this request, arguing that there is no way 
of determining whether a directional antenna has been installed 
properly without hiring a licensed land-surveyor, which it believes is 
unlikely to occur. The Commission previously considered and rejected 
requests to consider white space device transmit antenna directivity in 
the White Spaces Order on Reconsideration and did not make any 
proposals on this issue in the NPRM. The Commission declines to take 
any action on these requests.
    69. Wireless microphone issues. Wireless microphone interests 
request that the Commission not take action to change the rules for 
white space devices until it acts on the outstanding proceeding (GN 
Docket No. 14-166) that proposed to expand the eligibility for 
obtaining a part 74 license for wireless microphones and until the 
Commission addresses difficulties with the white

[[Page 2290]]

space database in registering licensed wireless microphones.
    70. The Commission declines to defer action in this proceeding 
pending a decision in GN Docket No. 14-166 on expanding part 74 
licensing eligibility. The Commission actions in this proceeding will 
benefit Americans in rural and underserved areas by enabling improved 
broadband access. The Commission does not wish to delay these public 
benefits until some unspecified point in the future. Further, the 
Commission decision here will not adversely impact either licensed or 
unlicensed wireless microphone operations. For example, the Commission 
is limiting higher power and antenna height operations, as well as 
higher power geo-fenced operations, to areas where the spectrum is less 
congested, which will limit the impact on wireless microphones that 
operate in the TV bands. Moreover, because white space devices operate 
on an unlicensed basis, they are obligated by the rules to protect 
licensed wireless microphone operations; unlicensed wireless 
microphones operate on a co-equal basis with white space devices. 
However, if the Commission decides to expand wireless microphone 
licensing eligibility in GN Docket No. 14-166, any newly licensed 
wireless microphone operation would receive the same protection from 
harmful interference, even if white space device operators need to 
adjust their systems. Thus, the actions the Commission takes in this 
Report and Order do not alter the relationship between wireless 
microphones and white space devices, including the obligation for 
unlicensed devices to protect licensed wireless microphones.
    71. The Commission appreciates parties bringing concerns about the 
white space database to its attention, and is working with the database 
administrators to address them. The Commission notes that a new 
administrator, RED Technologies, has taken over operation of the 
Nominet white space database. However, the Commission believes that the 
concerns parties raised, e.g., improvements to the licensed wireless 
microphone registration procedure, can be addressed without a need to 
delay action in this proceeding.

Procedural Matters

    72. Paperwork Reduction Act Analysis. This document contains new or 
modified information collection requirements subject to the Paperwork 
Reduction Act of 1995 (PRA), Public Law 104-13. It will be submitted to 
the Office of Management and Budget (OMB) for review under section 
3507(d) of the PRA. OMB, the general public, and other Federal agencies 
will be invited to comment on the new or modified information 
collection requirements contained in this proceeding. In addition, we 
note that pursuant to the Small Business Paperwork Relief Act of 2002, 
Public Law 107-198, see 44 U.S.C. 3506(c)(4), we previously sought 
specific comment on how the Commission might further reduce the 
information collection burden for small business concerns with fewer 
than 25 employees.
    73. Final Regulatory Flexibility Analysis. As required by the 
Regulatory Flexibility Act of 1980 (RFA), as amended, the Commission 
has prepared a Final Regulatory Flexibility Analysis (FRFA) regarding 
the possible significant economic impact on small entities of the 
policies and rules adopted in this Report and Order, which the full 
FRFA is found in Appendix C at https://www.fcc.gov/document/fcc-increases-unlicensed-wireless-operations-tv-white-spaces-0. The 
Commission's Consumer and Governmental Affairs Bureau, Reference 
Information Center, will send a copy of the Report and Order, including 
the FRFA, to the Chief Counsel for Advocacy of the Small Business 
Administration.
    74. Congressional Review Act. The Commission has determined, and 
the Administrator of the Office of Information and Regulatory Affairs, 
Office of Management and Budget, concurs that this rule is non-major 
under the Congressional Review Act, 5 U.S.C. 804(2). The Commission 
will send a copy of this Report and Order to Congress and the 
Government Accountability Office pursuant to 5 U.S.C. 801(a)(1)(A).

Ordering Clauses

    75. It is ordered, pursuant to sections 4(i), 201, 302, and 303 of 
the Communications Act of 1934, as amended, 47 U.S.C. 154(i), 201, 
302a, 303, that this Report and Order is hereby adopted.
    76. It is further ordered that the amendments of the Commission's 
rules as set forth below are adopted, effective thirty days from the 
date of publication in the Federal Register, except for the amendment 
to Sec.  15.709(g)(1)(ii), which contains new or modified information 
collection requirements that require approval by the OMB under the PRA 
and will become effective after the Commission publishes a document in 
the Federal Register announcing such approval and the relevant 
effective date.
    77. It is further ordered that the Commission's Consumer and 
Governmental Affairs Bureau, Reference Information Center, shall send a 
copy of this Report and Order, including the Final Regulatory 
Flexibility Analyses, to the Chief Counsel for Advocacy of the Small 
Business Administration.
    78. It is further ordered that the Commission's Consumer and 
Governmental Affairs Bureau, Reference Information Center, shall send a 
copy of this Report and Order, including the Final Regulatory 
Flexibility Analyses, to Congress and the Government Accountability 
Office pursuant to the Congressional Review Act, see 5 U.S.C. 
801(a)(1)(A).

List of Subjects in 47 CFR Part 15

    Communications equipment, Radio, Reporting and recordkeeping 
requirement.

Federal Communications Commission.
Marlene Dortch,
Secretary.

Final Rules

    For the reasons discussed in the preamble, the Federal 
Communications Commission amends 47 CFR part 15 as follows:

PART 15--RADIO FREQUENCY DEVICES

0
1. The authority citation for part 15 continues to read as follows:

    Authority: 47 U.S.C. 154, 302a, 303, 304, 307, 336, 544a, and 
549.


0
2. Amend Sec.  15.703 by:
0
a. Removing the paragraph designations;
0
b. Adding a definition for ``Geo-fenced area'' in alphabetical order;
0
c. Revising the definition of ``Less congested area'';
0
d. Adding definitions for ``Mobile white space device'' and 
``Narrowband white space device in alphabetical order.
    The additions and revision read as follows:


Sec.  15.703   Definitions.

* * * * *
    Geo-fenced area. A defined geographic area over which the white 
space database has determined the set of available channels.
* * * * *
    Less congested area. Geographic areas where at least half of the TV 
channels within a specific TV band are unused for broadcast and other 
protected services and available for white space device use. Less 
congested areas are determined separately for each TV

[[Page 2291]]

band--the low VHF band (channels 2-6), the high VHF band (channels 7-
13) and the UHF band (channels 14-36); i.e., one, two or all three 
bands or any combination could qualify as less congested. White space 
devices may only operate at the levels permitted for less congested 
areas within the area and the specific TV band(s) that qualify as a 
less congested area. For the purpose of this definition, a channel is 
considered available for white space device use if it is available for 
fixed devices operating with 40 milliwatts EIRP at 3 meters HAAT. Less 
congested areas in the UHF TV band are also considered to be less 
congested areas in the 600 MHz service band.
    Mobile white space device. A white space device that transmits and/
or receives radiocommunication signals on available channels within a 
defined geo-fenced area. A mobile white space device uses an 
incorporated geo-location capability to determine its location with 
respect to the boundaries of the defined area. A mobile white space 
device may operate only in less congested areas.
* * * * *
    Narrowband white space device. A fixed or personal/portable white 
space device operating in a bandwidth of no greater than 100 kilohertz.
* * * * *

0
3. Revise Sec.  15.707 to read as follows:


Sec.  15.707   Permissible channels of operation.

    (a)(1) 470-614 MHz band. Fixed and personal/portable white space 
devices are permitted to operate on available channels in the frequency 
bands 470-614 MHz (TV channels 14-37), subject to the interference 
protection requirements in Sec. Sec.  15.711 and 15.712.
    (2) 600 MHz duplex gap. Fixed and personal/portable white space 
devices may operate in the 657-663 MHz segment of the 600 MHz duplex 
gap.
    (3) 600 MHz service band. Fixed and personal/portable white space 
devices may operate on frequencies in the bands 617-652 MHz and 663-698 
MHz in areas where 600 MHz band licensees have not commenced 
operations, as defined in Sec.  27.4 of this chapter.
    (4) Channel 37 guard band. White space devices are not permitted to 
operate in the band 614-617 MHz.
    (b) Only mobile white space devices and fixed white space devices 
that communicate only with other fixed or mobile white space devices 
may operate on available channels in the bands 54-72 MHz (TV channels 
2-4), 76-88 MHz (TV channels 5 and 6), and 174-216 MHz (TV channels 7-
13), subject to the interference protection requirements in Sec. Sec.  
15.711 and 15.712.
    (c) Narrowband and mobile white space devices may only operate on 
frequencies below 602 MHz.

0
4. Amend Sec.  15.709 by:
0
a. Revising paragraphs (a)(2)(i);
0
b. Adding paragraph (a)(5);
0
c. Revising paragraph (b)(1);
0
d. Adding paragraph (b)(4);
0
e. Revising paragraphs (c)(2) and (g)(1)(i); and
0
f. Delayed indefinitely, revising paragraph (g)(1)(ii).
    The additions and revisions read as follows:


Sec.  15.709   General technical requirements.

    (a) * * *
    (2) * * *
    (i)(A) Fixed devices in the TV bands below 602 MHz: Up to 4 W (36 
dBm) EIRP, and up to 16 W (42 dBm) EIRP in less congested areas. Fixed 
devices in the 602-608 MHz band may operate with up to 4 W (36 dBm) 
EIRP.
    (B) Fixed devices in the 600 MHz service bands above 620 MHz: Up to 
4 W (36 dBm) EIRP, and up to 10 W (40 dBm) EIRP in less congested 
areas. Fixed devices that operate in any portion of the 614-620 MHz 
band may operate with up to 4 W (36 dBm) EIRP.
* * * * *
    (5) Mobile devices in the TV bands below 602 MHz. Up to 16 W (42 
dBm) EIRP in less congested areas. Mobile device operation is not 
permitted above 602 MHz. Mobile devices may operate only in less 
congested areas.
    (b) * * *
    (1) Fixed and mobile white space devices. (i) Technical limits for 
fixed and mobile white space devices are shown in the table in 
paragraph (b)(1)(iii) of this section and subject to the requirements 
of this section.
    (ii) For operation at EIRP levels of 36 dBm (4,000 mW) or less, 
fixed and mobile white space devices may operate at EIRP levels between 
the values shown in the table in paragraph (b)(1)(iii) of this section 
provided that the conducted power and the conducted power spectral 
density (PSD) limits are linearly interpolated between the values shown 
and the adjacent channel emission limit of the higher value shown in 
the table is met. Operation at EIRP levels above 36 dBm (4,000 mW) but 
not greater than 40 dBm (10,000 mW) shall follow the requirements for 
40 dBm (10,000 mW). Operation at EIRP levels above 40 dBm (10,000 mW) 
shall follow the requirements for 42 dBm (16,000 mW).
    (iii) The conducted power spectral density from a fixed or mobile 
white space device shall not be greater than the values shown in the 
table in this paragraph (b)(1)(iii) when measured in any 100 kilohertz 
band during any time interval of continuous transmission.

                                        Table 1 to Paragraph (b)(1)(iii)
----------------------------------------------------------------------------------------------------------------
                                                                                            Conducted adjacent
             EIRP (6 MHz)               Conducted power limit   Conducted PSD limit \1\   channel emission limit
                                               (6 MHz)              (100 kHz) (dBm)          (100 kHz) (dBm)
----------------------------------------------------------------------------------------------------------------
16 dBm (40 mW).......................  10 dBm (10 mW).........                     -7.4                    -62.8
20 dBm (100 mW)......................  14 dBm (25 mW).........                     -3.4                    -58.8
24 dBm (250 mW)......................  18 dBm (63 mW).........                      0.6                    -54.8
28 dBm (625 mW)......................  22 dBm (158 mW)........                      4.6                    -50.8
32 dBm (1,600 mW)....................  26 dBm (400 mW)........                      8.6                    -46.8
36 dBm (4,000 mW)....................  30 dBm (1,000 mW)......                     12.6                    -42.8
40 dBm (1,0000 mW)...................  30 dBm (1,000 mW)......                     12.6                    -42.8
42 dBm (16,000 mW)...................  30 dBm (1,000 mW)......                     12.6                    -42.8
----------------------------------------------------------------------------------------------------------------

* * * * *
    (4) Narrowband white space devices. (i) A narrowband white space 
device that operates as a client must communicate with a master device 
(fixed, Mode II, mobile or narrowband) that contacts the white space 
database to obtain a list of available channels and operating powers at 
its location. A narrowband white space device that acts as a master 
must incorporate a geo-location mechanism and be capable of obtaining 
lists of available channels and

[[Page 2292]]

operating powers from the white space database.
    (ii) Narrowband white space devices shall operate on channel sizes 
that are no more than 100 kilohertz. The edge of a narrowband channel 
shall be offset from the upper and lower edge of the 6 megahertz 
channel in which it operates by at least 250 kilohertz, except in the 
case where bonded 6 megahertz channels share a common band edge. 
Narrowband operating channels shall be at integral multiples of 100 
kilohertz beginning at a 250 kilohertz offset from a 6 megahertz 
channel's edge, or with no offset at the common band edge of two bonded 
6 megahertz channels.
    (iii) The conducted power limit is 12.6 dBm in a 100 kilohertz 
segment. The EIRP limit is 18.6 dBm in a 100 kilohertz segment. The 
conducted power spectral density limit is 12.6 dBm in any 100 kilohertz 
band during any time interval of continuous transmission.
    (iv) Conducted adjacent channel emissions shall be limited to -42.8 
dBm in 100 kilohertz in a first adjacent 6 megahertz channel, starting 
at the edge of the 6 megahertz channel within which the narrowband 
device is operating. This limit shall not apply between the edge of the 
narrowband channel and the edge of the 6 megahertz channel that 
contains it.
    (v) If transmitting antennas of directional gain greater than 6 dBi 
are used, the maximum conducted power output shall be reduced by the 
amount in dB that the directional gain of the antenna exceeds 6 dBi.
    (vi) Total occupancy for each narrowband channel shall be limited 
to 36 seconds per hour.
    (c) * * *
    (2) The conducted power, PSD, and adjacent channel limits for fixed 
and mobile white space devices operating at greater than 36 dBm (4,000 
milliwatts) EIRP shown in the table in paragraph (b)(1)(iii) of this 
section are based on a maximum transmitting antenna gain of 12 dBi. If 
transmitting antennas of directional gain greater than 12 dBi are used, 
the maximum conducted output power shall be reduced by the amount in dB 
that the directional gain of the antenna exceeds 12 dBi.
* * * * *
    (g) * * *
    (1) * * *
    (i) Above ground level. The transmit antenna height shall not 
exceed 10 meters above ground level in any area for fixed white space 
devices operating in the TV bands at 40 mW EIRP or less or operating 
across multiple contiguous TV channels at 100 mW EIRP or less.
    (ii) Height above average terrain (HAAT). For devices operating in 
the TV bands below 602 MHz, the transmit antenna shall not be located 
where its height above average terrain exceeds 250 meters generally, or 
500 meters in less congested areas. For devices operating in all other 
bands the transmit antenna shall not be located where its height above 
average terrain exceeds 250 meters. The HAAT is to be calculated by the 
white space database using the methodology in Sec.  73.684(d) of this 
chapter. For HAAT greater than 250 meters the following procedures are 
required:
    (A) The installing party must contact a white space database and 
identify all TV broadcast station contours that would be potentially 
affected by operation at the planned HAAT and EIRP. A potentially 
affected TV station is one where the protected service contour is 
within the applicable separation distance for the white space device 
operating at an assumed HAAT of 50 meters above the planned height at 
the proposed power level.
    (B) The installing party must notify each of these licensees and 
provide the geographic coordinates of the white space device, relevant 
technical parameters of the proposed deployment, and contact 
information.
    (C) No earlier than four calendar days after the notification in 
paragraph (g)(1)(ii)(B) of this section, the installing party may 
commence operations.
    (D) Upon request, the installing party must provide each 
potentially affected licensee with information on the time periods of 
operations.
    (E) If the installing party seeks to modify its operations by 
increasing its power level, by moving more than 100 meters horizontally 
from its location, or by making an increase in the HAAT or EIRP of the 
white space device that results in an increase in the minimum required 
separation distances from co-channel or adjacent channel TV station 
contours, it must conduct a new notification.
    (F) All notifications required by this section must be in written 
form (including email). In all cases, the names of persons contacted, 
and dates of contact should be kept by the white space device operator 
for its records and supplied to the Commission upon request.
* * * * *

0
5. Amend Sec.  15.711 by revising paragraphs (j)(3) and (4) and adding 
paragraph (k) to read as follows:


Sec.  15.711   Interference avoidance methods.

* * * * *
    (j) * * *
    (3) A white space database shall be protected from unauthorized 
data input or alteration of stored data. To provide this protection, 
the white space database administrator shall establish communications 
authentication procedures that allow fixed, mobile, and Mode II white 
space devices to be assured that the data they receive is from an 
authorized source.
    (4) Applications for certification of white space devices shall 
include a high level operational description of the technologies and 
measures that are incorporated in the device to comply with the 
security requirements of this section. In addition, applications for 
certification of fixed, mobile, and Mode II white space devices shall 
identify at least one of the white space databases operated by a 
designated white space database administrator that the device will 
access for channel availability and affirm that the device will conform 
to the communications security methods used by that database.
    (k) Requirements for mobile white space devices. (1) Mobile white 
space devices shall operate within geo-fenced areas over which the 
white space database has determined channel availability. A mobile 
white space device shall have the capability to internally store the 
boundaries of a geo-fenced area and determine its location with respect 
to those boundaries. The area boundaries stored within a mobile white 
space device must be the same as those used by the white space database 
to determine channel availability.
    (2) A mobile white space device shall incorporate a geo-location 
capability to determine its geographic coordinates. A mobile white 
space device may obtain its geographic coordinates through an external 
geo-location source, provided that source is on the same vehicle or 
other mobile platform as the mobile device. An external geo-location 
source may be connected to a mobile device through either a wired or a 
wireless connection, and a single geo-location source may provide 
location information to multiple mobile devices on the same mobile 
platform. An external geo-location source must be connected to a mobile 
device using a secure connection that ensures that only an external 
geo-location source that has been approved with a particular mobile 
device can provide geographic coordinates to that device. The 
geographic coordinates must be provided automatically by the external 
geo-location source to the mobile device; users may not manually enter 
them. Alternatively, an extender cable may be used to connect a remote 
receive

[[Page 2293]]

antenna to a geo-location receiver within a mobile device.
    (3) The applicant for certification of a mobile device must 
demonstrate the accuracy of the geo-location method used and the 
location uncertainty as defined in paragraph (b) of this section. For 
mobile devices that are not using an internal geo-location capability, 
this uncertainty must account for the accuracy of the geo-location 
source and the separation distance between such source and the white 
space device.
    (4) The antenna height above ground shall be determined by the 
operator of the device, or by an automatic means. The mobile device 
shall provide this information to the white space database when it 
requests a list of available channels for the geo-fenced area in which 
it will operate.
    (5) Each mobile device must access a white space database over the 
internet to determine the available channels and the maximum permitted 
power for each available channel within the geo-fenced area in which it 
will operate. The white space database must take into consideration the 
mobile device's antenna height above ground level and geo-location 
uncertainty in determining the list of available channels. It must also 
take into consideration any variation in mobile device HAAT throughout 
the geo-fenced area and must use the highest HAAT within the geo-fenced 
area in determining channel availability. Operation is permitted only 
on channels that are indicated by the database as being available at 
the same power level throughout the entire geo-fenced area in which the 
mobile device will operate.
    (6) Mobile devices must comply with the same separation distances 
from protected services in Sec.  15.712 as fixed devices.
    (7) Mobile devices may use electrically steerable directional 
antennas, but a device's maximum EIRP in any direction must be used by 
the white space database in determining channel availability.
    (8) A mobile device must re-check its coordinates at least once 
every 60 seconds while in operation except while in sleep mode, i.e., 
in a mode in which the device is inactive but is not powered down. It 
must cease operation if its location is within 1.9 kilometers of the 
boundary, or outside the boundary, of the geo-fenced area over which 
the white space database has determined the available channels.
    (9) Each mobile white space device shall access the white space 
database at least once a day to verify that the operating channels 
within the geo-fenced area continue to remain available. Each mobile 
white space device must adjust its use of channels in accordance with 
channel availability schedule information provided by its database for 
the 48-hour period beginning at the time the device last accessed the 
database for a list of available channels.
    (10) Operation of mobile white space devices on satellites and 
aircraft, including unmanned aerial vehicles, is prohibited.

0
6. Amend Sec.  15.712 by:
0
a. Revising the introductory text and paragraphs (a)(2) and (3) and 
(b)(3)(ii) and (iii);
0
b. Adding paragraph (b)(3)(iv);
0
c. Revising paragraph (c)(2)(ii);
0
d. Adding paragraph (c)(2)(iii); and
0
e. Revising paragraphs (d), (f), (g), (h)(1), and (i)(1).
    The revisions and additions read as follows:


Sec.  15.712   Interference protection requirements.

    The separation distances in this section apply to fixed, mobile, 
and personal/portable white space devices with a location accuracy of 
50 meters. These distances must be increased by the amount 
that the location uncertainty of a white space device exceeds 50 meters. Narrowband white space devices shall comply with the 
separation distances applicable to a fixed white space device operating 
with 30 dBm conducted power and 36 dBm EIRP across a 6 megahertz 
channel.
    (a) * * *
    (2) Required separation distance. White space devices must be 
located outside the contours indicated in paragraph (a)(1) of this 
section of co-channel and adjacent channel stations by at least the 
minimum distances specified in the tables in paragraph (a)(2)(v) of 
this section.
    (i) If a device operates between two defined power levels, it must 
comply with the separation distances for the higher power level.
    (ii) White space devices operating at 40 mW EIRP or less are not 
required to meet the adjacent channel separation distances.
    (iii) Fixed white space devices operating at 100 mW EIRP or less 
per 6 megahertz across multiple contiguous TV channels with at least 3-
megahertz separation between the frequency band occupied by the white 
space device and adjacent TV channels are not required to meet the 
adjacent channel separation distances.
    (iv) Fixed white space devices may only operate above 4 W EIRP in 
less congested areas as defined in Sec.  15.703.
    (v) The following are the tables of minimum required separation 
distances outside the contours of co-channel and adjacent channel 
stations that white space devices must meet.

                     Table 2 to Paragraph (a)(2)(v)
------------------------------------------------------------------------
              Mode II personal/portable white space devices
-------------------------------------------------------------------------
                                  Required separation in kilometers from
                                  co-channel digital or analog TV  (full
                                      service or low power) protected
                                                  contour
                                 ---------------------------------------
                                    16 dBm (40 mW)      20 dBm (100 mW)
------------------------------------------------------------------------
Communicating with Mode II or             1.3                 1.7
 Fixed device.
Communicating with Mode I device          2.6                 3.4
------------------------------------------------------------------------


[[Page 2294]]


                                                             Table 3 to Paragraph (a)(2)(v)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                Fixed white space devices
---------------------------------------------------------------------------------------------------------------------------------------------------------
                                                    Required separation in kilometers from co-channel digital or analog TV  (full service or low power)
                                                                                           protected contour \1\
    Antenna height above  average terrain of     -------------------------------------------------------------------------------------------------------
          unlicensed devices  (meters)             16 dBm (40  20 dBm (100  24 dBm (250  28 dBm (625     32 dBm     36 dBm (4    40 dBm (10   42 dBm (16
                                                      mW)          mW)          mW)          mW)       (1,600 mW)       W)           W)           W)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Less than 3.....................................          1.3          1.7          2.1          2.7          3.3          4.0          4.5          5.0
3-10............................................          2.4          3.1          3.8          4.8          6.1          7.3          8.5          9.4
10-30...........................................          4.2          5.1          6.0          7.1          8.9         11.1         13.9         15.3
30-50...........................................          5.4          6.5          7.7          9.2         11.5         14.3         19.1         20.9
50-75...........................................          6.6          7.9          9.4         11.1         13.9         18.0         23.8         26.2
75-100..........................................          7.7          9.2         10.9         12.8         17.2         21.1         27.2         30.1
100-150.........................................          9.4         11.1         13.2         16.5         21.4         25.3         32.3         35.5
150-200.........................................         10.9         12.7         15.8         19.5         24.7         28.5         36.4         39.5
200-250.........................................         12.1         14.3         18.2         22.0         27.3         31.2         39.5         42.5
250-300.........................................         13.9         16.4         20.0         23.9         29.4         35.4         42.1         45.9
300-350.........................................         15.3         17.9         21.7         25.7         31.4         37.6         44.5         48.4
350-400.........................................         16.6         19.3         23.2         27.3         33.3         39.7         46.9         51.0
400-450.........................................         17.6         20.4         24.4         28.7         35.1         41.9         49.4         53.8
450-500.........................................         18.3         21.4         25.5         30.1         36.7         43.7         51.4         55.9
500-550.........................................         18.9         21.8         26.3         31.0         37.9         45.3         53.3         57.5
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ When communicating with Mode I personal/portable white space devices, the required separation distances must be increased beyond the specified
  distances by 1.3 kilometers if the Mode I device operates at power levels no more than 40 mW EIRP or 1.7 kilometers if the Mode I device operates at
  power levels above 40 mW EIRP.


                     Table 4 to Paragraph (a)(2)(v)
------------------------------------------------------------------------
                  Personal/portable white space devices
-------------------------------------------------------------------------
                                              Required separation in
                                             kilometers from adjacent
                                          channel digital  or analog TV
                                           (full service or low power)
                                                protected contour
                                        --------------------------------
                                                 20 dBm (100 mW)
------------------------------------------------------------------------
Communicating with Mode II or Fixed                    0.1
 device.
Communicating with Mode I device.......                0.2
------------------------------------------------------------------------


                                                             Table 5 to Paragraph (a)(2)(v)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                Fixed white space devices
---------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                  Required separation in kilometers from adjacent channel digital or analog TV  (full
                                                                                      service or low power) protected contour \1\
 Antenna height above average  terrain of unlicensed devices  ------------------------------------------------------------------------------------------
                           (meters)                            20 dBm (100  24 dBm (250  28 dBm (625     32 dBm     36 dBm (4    40 dBm (10   42 dBm (16
                                                                   mW)          mW)          mW)       (1,600 mW)       W)           W)           W)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Less than 3..................................................          0.1          0.1          0.1          0.1          0.2          0.2          0.3
3-10.........................................................          0.1          0.2          0.2          0.2          0.3          0.4          0.5
10-30........................................................          0.2          0.3          0.3          0.4          0.5          0.6          0.7
30-50........................................................          0.3          0.3          0.4          0.5          0.7          0.8          1.0
50-75........................................................          0.3          0.4          0.5          0.7          0.8          0.9          1.0
75-100.......................................................          0.4          0.5          0.6          0.8          1.0          1.1          1.3
100-150......................................................          0.5          0.6          0.8          0.9          1.2          1.3          1.5
150-200......................................................          0.5          0.7          0.9          1.1          1.4          1.5          1.7
200-250......................................................          0.6          0.8          1.0          1.2          1.5          1.7          1.9
250-300......................................................          0.7          0.8          1.0          1.3          1.6          2.1          2.3
300-350......................................................          0.7          0.9          1.1          1.4          1.8          2.2          2.4
350-400......................................................          0.8          1.0          1.2          1.5          1.9          2.4          2.7
400-450......................................................          0.8          1.0          1.3          1.6          2.1          2.6          2.9
450-500......................................................          0.8          1.1          1.4          1.7          2.1          2.7          2.9
500-550......................................................          0.9          1.2          1.5          1.8          2.2          2.8          3.0
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ When communicating with a Mode I personal/portable white space device that operates at power levels above 40 mW EIRP, the required separation
  distances must be increased beyond the specified distances by 0.1 kilometers.

    (3) Fixed white space device antenna height. Fixed white space 
devices must comply with the requirements of Sec.  15.709(g).
    (b) * * *
    (3) * * *
    (ii) White space devices operating with more than 4 watts EIRP and 
up to 10 watts EIRP may not operate within 10.2 kilometers from the 
receive site for co-channel operation and 2.5 kilometers

[[Page 2295]]

from the receive site for adjacent channel operation.
    (iii) White space devices operating with more than 10 watts EIRP 
may not operate within 16.6 kilometers from the receive site for co-
channel operation and 3.5 kilometers from the receive site for adjacent 
channel operation.
    (iv) For purposes of this section, a TV station being received may 
include a full power TV station, TV translator station or low power TV/
Class A TV station.
    (c) * * *
    (2) * * *
    (ii) White space devices operating with more than 4 watts EIRP and 
up to 10 watts EIRP may not operate within 10.2 km from the receive 
site for co-channel operation and 2.5 km from the receive site for 
adjacent channel operation.
    (iii) White space devices operating with more than 10 watts EIRP 
may not operate within 16.6 kilometers from the receive site for co-
channel operation and 3.5 kilometers from the receive site for adjacent 
channel operation.
    (d) PLMRS/CMRS operations. (1) White space devices may not operate 
at distances less than those specified in the table in this paragraph 
(d)(1) from the coordinates of the metropolitan areas and on the 
channels listed in Sec.  90.303(a) of this chapter.

                                           Table 6 to Paragraph (d)(1)
----------------------------------------------------------------------------------------------------------------
                                          Required separation in kilometers from the areas specified in Sec.
                                                              90.303(a)  of this chapter
                                     ---------------------------------------------------------------------------
White space device transmitter power          Co-channel operation               Adjacent channel operation
                                     ---------------------------------------------------------------------------
                                       Up to 250 meters   Greater than 250   Up to 250 meters   Greater than 250
                                             HAAT           meters HAAT            HAAT           meters HAAT
----------------------------------------------------------------------------------------------------------------
Up to 4 watts EIRP..................              134.0              158.0              131.0              155.4
Greater than 4 watts and up to 10                 136.0              169.8              131.5              166.0
 watts EIRP.........................
Greater than 10 watts and up to 16                139.2              171.1              132.2              166.2
 watts EIRP.........................
----------------------------------------------------------------------------------------------------------------

    (2) White space devices may not operate at distances less than 
those specified in the table in this paragraph (d)(2) from PLMRS/CMRS 
operations authorized by waiver outside of the metropolitan areas 
listed in Sec.  90.303(a) of this chapter.

                                           Table 7 to Paragraph (d)(2)
----------------------------------------------------------------------------------------------------------------
                                        Required separation in kilometers from operations authorized by waiver
                                          outside of the areas specified in Sec.   90.303(a) of this chapter
                                     ---------------------------------------------------------------------------
White space device transmitter power          Co-channel operation               Adjacent channel operation
                                     ---------------------------------------------------------------------------
                                       Up to 250 meters   Greater than 250   Up to 250 meters   Greater than 250
                                             HAAT           meters HAAT            HAAT           meters HAAT
----------------------------------------------------------------------------------------------------------------
Up to 4 watts EIRP..................               54.0               78.0               51.0               75.4
Greater than 4 watts and up to 10                  56.0               89.8               51.5               86.0
 watts EIRP.........................
Greater than 10 watts and up to 16                 59.2               91.1               52.2               86.2
 watts EIRP.........................
----------------------------------------------------------------------------------------------------------------

* * * * *
    (f) Low power auxiliary services, including wireless microphones. 
White space devices are not permitted to operate within the following 
distances of the coordinates of registered low power auxiliary station 
sites on the registered channels during the designated times they are 
used by low power auxiliary stations.
    (1) Fixed white space devices with 10 watts EIRP or less: 1 
kilometer.
    (2) Fixed white space devices with greater than 10 watts EIRP: 1.3 
kilometers.
    (3) Personal/portable white space devices: 400 meters.
    (g) Border areas near Canada and Mexico. Fixed, mobile, and 
personal/portable white space devices shall comply with the required 
separation distances in paragraph (a)(2) of this section from the 
protected contours of TV stations in Canada and Mexico. White space 
devices are not required to comply with the separation distances in 
paragraph (a)(2) from portions of the protected contours of Canadian or 
Mexican TV stations that fall within the United States.
    (h) * * *
    (1) Operation of fixed, mobile, and personal/portable white space 
devices is prohibited on all channels within 2.4 kilometers at the 
following locations.
* * * * *
    (i) * * *
    (1) Fixed white space devices may only operate above 4 W EIRP in 
less congested areas as defined in Sec.  15.703.
* * * * *

0
7. Amend Sec.  15.713 by revising paragraphs (a)(1), (e)(1), (2), (3), 
and (6), (h), and (l)(2) to read as follows:


Sec.  15.713   White space database.

    (a) * * *
    (1) To determine and provide to a white space device, upon request, 
the available channels at the white space device's location in the TV 
bands, the 600 MHz duplex gap, the 600 MHz service band, and 608-614 
MHz (channel 37). Available channels are determined based on the 
interference protection requirements in Sec.  15.712. A database must 
provide fixed, mobile, and Mode II personal portable white space 
devices with channel availability information that includes scheduled 
changes in channel availability over the course of the 48-hour period 
beginning at the time the white space devices make a recheck contact. 
In making lists of available channels available to a white space 
device, the white space database shall ensure that all communications 
and interactions between the white space database and the white space 
device include adequate security measures such that

[[Page 2296]]

unauthorized parties cannot access or alter the white space database or 
the list of available channels sent to white space devices or otherwise 
affect the database system or white space devices in performing their 
intended functions or in providing adequate interference protections to 
authorized services operating in the TV bands, the 600 MHz duplex gap, 
the 600 MHz service band, and 608-614 MHz (channel 37). In addition, a 
white space database must also verify that the FCC identifier (FCC ID) 
of a device seeking access to its services is valid; under the 
requirement in this paragraph (a)(1) the white space database must also 
verify that the FCC ID of a Mode I device provided by a fixed or Mode 
II device is valid. A list of devices with valid FCC IDs and the FCC 
IDs of those devices is to be obtained from the Commission's Equipment 
Authorization System.
* * * * *
    (e) * * *
    (1) Fixed, mobile, and Mode II white space devices must provide 
their location and required identifying information to the white space 
database in accordance with the provisions of this subpart.
    (2) Fixed, mobile, and Mode II white space devices shall not 
transmit unless they receive, from the white space database, a list of 
available channels and may only transmit on the available channels on 
the list provided by the database.
    (3) Fixed and mobile white space devices register and receive a 
list of available channels from the database by connecting to the 
internet, either directly or through another fixed white space device 
that has a direct connection to the internet. Fixed devices must also 
register with the database in accordance with paragraph (g) of this 
section.
* * * * *
    (6) A fixed device with an antenna height above ground that exceeds 
30 meters or an antenna height above average terrain (HAAT) that 
exceeds 250 meters generally, or 500 meters in less congested areas 
shall not be provided a list of available channels. The HAAT is to be 
calculated using computational software employing the methodology in 
Sec.  73.684(d) of this chapter.
* * * * *
    (h) Mode II personal/portable and mobile device information to 
database. (1) A mobile device and a personal/portable device operating 
in Mode II shall provide the database its FCC Identifier (as required 
by Sec.  2.926 of this chapter) and serial number as assigned by the 
manufacturer.
    (2) A personal/portable device operating in Mode II shall provide 
the database the device's geographic coordinates (latitude and 
longitude (NAD 83)).
    (3) A mobile device shall provide the database with the boundaries 
of the geo-fenced area in which it will operate. Alternatively, the 
boundaries of the geo-fenced area may be loaded from the database into 
the mobile device.
* * * * *
    (l) * * *
    (2) A white space database shall verify that the FCC identification 
number supplied by a fixed, mobile, or personal/portable white space 
device is for a certified device and may not provide service to an 
uncertified device.
* * * * *

0
8. Amend Sec.  15.714 by revising paragraph (a) to read as follows:


Sec.  15.714   White space database administration fees.

    (a) A white space database administrator may charge a fee for 
provision of lists of available channels to fixed, mobile, and 
personal/portable devices and for registering fixed devices. This 
paragraph (a) applies to devices that operate in the TV bands, the 600 
MHz service band, the 600 MHz duplex gap, and 608-614 MHz (channel 37).
* * * * *

0
9. Amend Sec.  15.715 by revising paragraph (e) to read as follows:


Sec.  15.715   White space database administrator.

* * * * *
    (e) Provide accurate lists of available channels and the 
corresponding maximum permitted power for each available channel to 
fixed, mobile, and personal/portable white space devices that submit to 
it the information required under Sec.  15.713(e), (g), and (h) based 
on their geographic location and provide accurate lists of available 
channels and the corresponding maximum permitted power for each 
available channel to fixed, mobile, and Mode II devices requesting 
lists of available channels for Mode I devices. Database administrators 
may allow prospective operators of white space devices to query the 
database and determine whether there are vacant channels at a 
particular location.
* * * * *
[FR Doc. 2020-26706 Filed 1-11-21; 8:45 am]
BILLING CODE 6712-01-P