Goto Section: 27.70 | 27.73 | Table of Contents
Revised as of April 3, 2020
Goto Year:2019 |
§ 27.72 Information sharing requirements.
This section requires WCS licensees in the 2305-2320 MHz and 2345-2360
MHz bands to share information regarding the location and operation of
base and fixed stations (except fixed customer premises equipment) with
Satellite Digital Audio Radio Service (SDARS) licensees in the
2320-2345 MHz band. Section 25.263 of this chapter requires SDARS
licensees in the 2320-2345 MHz band to share information regarding the
location and operation of terrestrial repeaters with WCS licensees in
the 2305-2320 MHz and 2345-2360 MHz bands. WCS licensees are encouraged
to develop separate coordination agreements with SDARS licensees to
facilitate efficient deployment of and coexistence between each
service. To the extent the provisions of any such coordination
agreement conflict with the requirements set forth herein, the
procedures established under a coordination agreement will control. WCS
licensees must maintain a copy of any coordination agreement with an
SDARS licensee in their station files and disclose it to prospective
assignees, transferees, or spectrum lessees and, upon request, to the
(a) Sites and frequency selections. WCS licensees must select base and
fixed station sites and frequencies, to the extent practicable, to
minimize the possibility of harmful interference to operations in the
SDARS 2320-2345 MHz band.
(b) Prior notice periods. WCS licensees that intend to operate a base
or fixed station must, before commencing such operation, provide 10
business days prior notice to all SDARS licensees. WCS licensees that
intend to modify an existing station must, before commencing such
modified operation, provide 5 business days prior notice to all SDARS
licensees. For the purposes of this section, a business day is defined
by § 1.4(e)(2) of this chapter.
(1) For modifications other than changes in location, a licensee may
provide notice within 24 hours after the modified operation if the
modification does not result in a predicted increase of the power flux
density (PFD) at ground level by more than 1 dB since the last advance
notice was given. If a demonstration is made by the SDARS licensee that
such modifications may cause harmful interference to SDARS receivers,
WCS licensees will be required to provide notice 5 business days in
advance of additional station modifications.
(2) WCS base and fixed stations operating below 2 watts equivalent
isotropically radiated power (EIRP) are exempt from the notice
requirements set forth in this paragraph.
(3) WCS and SDARS licensees may enter into agreements regarding
alternative notification procedures.
(c) Contents of notice. (1) Notification must be written (e.g.,
certified letter, fax, or e-mail) and include the licensee's name, and
the name, address, and telephone number of its coordination
representative, unless the SDARS licensee and all potentially affected
WCS licensees reach a mutual agreement to provide notification by some
other means. WCS licensees and SDARS licensees may establish such a
mutually agreeable alternative notification mechanism without prior
Commission approval, provided that they comply with all other
requirements of this section.
(2) Regardless of the notification method, it must specify relevant
technical details, including, at a minimum:
(i) The coordinates of the proposed base or fixed stations to an
accuracy of no less than ±1 second latitude and longitude;
(ii) The proposed operating power(s), frequency band(s), and
(iii) The antenna center height above ground and ground elevation above
mean sea level, both to an accuracy of no less than ±1 meter;
(iv) The antenna gain pattern(s) in the azimuth and elevation planes
that include the peak of the main beam; and
(v) The antenna downtilt angle(s).
(3) A WCS licensee operating base or fixed stations must maintain an
accurate and up-to-date inventory of its stations, including the
information set forth in § 27.72(c)(2), which shall be available upon
request by the Commission.
(d) Calculation of notice period. Notice periods are calculated from
the date of receipt by the licensee being notified. If notification is
by mail, the date of receipt is evidenced by the return receipt on
certified mail. If notification is by fax, the date of receipt is
evidenced by the notifying party's fax transmission confirmation log.
If notification is by e-mail, the date of receipt is evidenced by a
return e-mail receipt. If the SDARS licensee and all potentially
affected WCS licensees reach a mutual agreement to provide notification
by some other means, that agreement must specify the method for
determining the beginning of the notice period.
(e) Duty to cooperate. WCS licensees must cooperate in good faith in
the selection and use of new station sites and new frequencies to
reduce interference and make the most effective use of the authorized
facilities. WCS licensees should provide SDARS licensees as much lead
time as practicable to provide ample time to conduct analyses and
opportunity for prudent base station site selection prior to WCS
licensees entering into real estate and tower leasing or purchasing
agreements. WCS licensees must have sufficient operational flexibility
in their network design to implement one or more technical solutions to
remedy harmful interference. Licensees of stations suffering or causing
harmful interference, as defined in § 27.64(d), must cooperate in good
faith and resolve such problems by mutually satisfactory arrangements.
If the licensees are unable to do so, the Wireless Telecommunications
Bureau, in consultation with the Office of Engineering and Technology
and the International Bureau, will consider the actions taken by the
parties to mitigate the risk of and remedy any alleged interference. In
determining the appropriate action, the Bureau will take into account
the nature and extent of the interference and act promptly to remedy
the interference. The Bureau may impose restrictions on WCS licensees,
including specifying the transmitter power, antenna height, or other
technical or operational measures to remedy the interference, and will
take into account previous measures by the licensees to mitigate the
risk of interference.
[ 75 FR 45071 , Aug. 2, 2010, as amended at 78 FR 9622 , Feb. 11, 2013]
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Goto Section: 27.70 | 27.73
Goto Year: 2019 |
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