Description of Application and Experiment

0134-EX-CM-2017 Text Documents

T-Mobile License LLC

2017-06-19ELS_193900

                                                                                     Exhibit
                                                                      T-Mobile License LLC
                                                               Experimental Station WI2XHR
                                                                               FCC Form 442
                                                                 Application for Modification

                 DESCRIPTION OF APPLICATION AND EXPERIMENT

T-Mobile License LLC (“T-Mobile”) hereby submits the attached application, requesting that the
Commission modify T-Mobile’s experimental Fifth Generation (“5G”) wireless operations in
Bellevue, Washington conducted under the call sign WI2XHR.

On May 4, 2016, the Commission issued the authorization for station WI2XHR, allowing T-
Mobile to conduct experimental operations in and around T-Mobile’s facilities in Bellevue,
Washington. T-Mobile continues to conduct 5G testing at those facilities. However, T-Mobile’s
research continues to evolve. In order to adequately test signal strength, transmission and
reception characteristics and other parameters associated with using millimeter wave spectrum in
its planned 5G network, T-Mobile seeks an increase in the Effective Radiated Power (“ERP”) of
the transmitters employed at its facilities. Because the transmitters will continue to operate in
closed environments, T-Mobile’s testing – albeit at a modified ERP level – will not cause
harmful interference to licensees in the frequency bands. Nevertheless, T-Mobile acknowledges
that its operations will occur on a secondary basis and that it will mitigate any interference
caused to primary users of the bands. Such testing will further advance T-Mobile’s
understanding of 5G technologies and operations in the millimeter bands.

Based on the foregoing, T-Mobile requests that the Commission process the modification
application promptly to accelerate T-Mobile’s 5G research efforts.



Document Created: 2017-06-19 13:27:01
Document Modified: 2017-06-19 13:27:01

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