FLUG  Meeting 03/23/2019

by Jeff Liebermann

5G and Reality

Frequencies (US Only)

• STC - ?
• AT&T – 39GHz
• C Spire – 28GHz
• Sprint – 2.5GHz
• T-Mobile – 600Mhz and 28GHz
• Verizon – 28GHz

FDD vs TDD

• Frequency Division Duplex  (2 frequencies)
• Time Division Duplex (1 frequency)

Benefits of 5G

• Faster – Allegedly does gigabit speeds
• Low latency – Needed for robotics, telemedicine, real time, high frequency trading.
• Latency=1 way.  RTT=round trip (ping).
• 12in/nsec, 30cm/nsec,1 mile/msec.
• 30% slower in fiber.
• Better spectrum efficiency and lower cost per bit.  Pack in more users.

Handset vs bricks

• Handsets only on lower <6GHz frequencies.
• Bricks (hot spots) on all frequencies.

How it works

• Range - power - bandwidth compromise
• Beam steering.  Large base station arrays.  Massive MIMO (128 antennas)
• https://www.mwrf.com/systems/defining-massive-mimo-5g-world
• Densification.  Small cell. 

Test cities

• Verizon – Sacramento, Houston, Indianapolis, Smog Angeles.
• https://www.lifewire.com/5g-availability-us-4155914
• https://www.npr.org/2019/03/05/700355632/coming-to-a-city-near-you-5g-fastest-wireless-yet-will-bring-new-services

“Five Myths About 5G, Debunked”

• Video https://www.youtube.com/watch?v=lu9G7ef9uBg

• Race to 5G  (0:14)
• Racing China (0:19)
• It’s all about smarter smartphones  (0:40)
• It’s all about Bandwidth  (1:30)
• 5G will mostly impact the Telecom Industry (2:50)
• 5G will replace 4G-LTE  (3:26)
• The rollout is coming soon  (3:52)

Acronym hell.  (The technology with the most acronyms wins).

• 5G NR (Release 15)
• 5G TF and 5G Home – Proprietary Verizon version of 5G NR.
• 5G E – AT&T marketing at its best.
• https://arstechnica.com/information-technology/2019/03/atts-5g-e-is-actually-slower-than-verizon-and-t-mobile-4g-study-finds/

• 3GPPP  http://www.3gpp.org http://www.3gpp.org/specifications/67-releases

Opposition, cancer, and such.

• Cancer incidence.  https://seer.cancer.gov/faststats/selections.php?series=cancer
• Environmental Health Trust.  456 YouTube videos on dangers of RF.  https://ehtrust.org
• Scientists for Wired Technology.  http://scientists4wiredtech.com

Misc:

Dish overload.  http://802.11junk.com/jeffl/crud/Dish-overload.jpg