Exhibit

0091-EX-ST-2018 Images

AT&T; Services, Inc.

2018-01-18ELS_203479

Exhibit
Applicant seeks a four (4) month special temporary authority “STA”) to demonstrate the
functionality and capabilities of fifth generation (“5G”) wireless communication systems, as well
as the propagation characteristics of the signals operating in the 28 GHz and 39 GHz spectrum
bands.

The industry standards organization, 3rd Generation Partnership Project (“3GPP”), has developed
5G standards, which facilitates the ability to develop and offer 5G services in 2018. 5G systems
will utilize advanced antenna technologies with beamforming and multiple in multiple out
(“MIMO”) technology, as well as more efficient coding and modulation schemes. These
technologies will result in higher spectral efficiencies, reduce latency to 1-5 milliseconds, and
enable gigabyte per-second (Gbps) mobile and fixed broadband services, significantly faster than
today’s average 4G speeds using long term evolution (“LTE) connections.

Applicant’s 5G demonstrations will involve communications between fixed (FX) base stations
placed indoors in a room or open space located inside a building at 300 Reunion Blvd., Dallas
TX, 75207. The building has concrete walls and windows with coated glass as shown below.
The 5G wireless link will be established between the base station and a maximum of two units of
mobile user equipment (“UE”) located in the same room or area, at a distance of about 10 meters
apart. The base station and UE will be operated at 3 meters and 2 meters, respectively, above
floor level. A channel sounder operating in the 28 GHz band will only transmit signals that are
received in the same area to demonstrate the millimeter wave (mmW) propagation
characteristics.

The demonstrations using this license will provide valuable information to potential users whose
feedback on the perceived performance of services provided through these 5G systems will also
enable future standards and system optimizations.

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Document Created: 2018-01-17 17:08:02
Document Modified: 2018-01-17 17:08:02

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