private 5G networks?

Tue Nov 30 23:21:54 UTC 2021

Michael Thomas <mike at mtcc.com> wrote:
> > What do you mean 3rd Tier?
> General Authorized Access? Taken from some random site looking it up.

  https://en.wikipedia.org/wiki/Citizens_Broadband_Radio_Service

it has 3 tiers:

* Incumbent access, primarily government and military radars, plus some
pre-existing band users.

* 3550 to 3650 MHz in 10MHz chunks, allocated for priority users by census
tracts for up to 3 years, with up to 7 Priority Access Licenses per tract.
Competitive bidding for getting these licenses.

* General Authorized Access users can use any of those chunks that aren't
assigned for priority use, or that nobody currently is transmitting on,
plus another 50 MHz at 3650-3700 in free-for-all mode unless there are
incumbents.

A local Spectrum Access System (SAS) would program the individual devices to
stay within the restrictions specified by the FCC and any licenses
issued to the operator, for a particular geography.

	John

PS: The CBRS radio devices can't turn on their transmitter until they
talk a detailed negotiation to their SAS, via HTTP over TLS 1.2 over
IPv4.  IPv6 support is optional.  None of this negotiation appears to
happen over the radio, it's all apparently on Ethernet (or assumes some
separate Internet provisioning not done in CBRS spectrum).  And there's
no discovery procedure, it's all done by manual configuration.  See:

  https://winnf.memberclicks.net/assets/CBRS/WINNF-TS-0016.pdf