private 5G networks?

Tue Nov 30 23:24:26 UTC 2021

Sorry, I wasn't sure what you meant by 3rd tier, but yes, we are talking
about GAA.

The important bit is as I stated is "or that nobody currently is
transmitting on"

And yes, the CBRS Radio, called a CBSD must be configured ahead of time to
making freq grant requests to the SAS. This happens via the Mgmt.
connection of the CBSD and is done via TLS over HTTP.

Shane

On Tue, Nov 30, 2021 at 6:22 PM John Gilmore <gnu at toad.com> wrote:

> 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
>
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