nanog mailing list archives

Re: private 5G networks?


From: Anthony <will.anthony () gmail com>
Date: Tue, 30 Nov 2021 16:10:36 -0600

Opps,

Replied direct this is a bit one sided of the conversation but I want to make certain the community is clear on this as CBRS is a valuable spectrum.

Unfortunately Shane this is incorrect.   GAA is not significantly different then any unlicensed spectrum as to interference avoidance.  But the SAS will typically have tools that will give you some info on how to avoid channels already in use.  This is truly useful.

As a CBRS GAA user, i can understand your confusion,  When a SAS (Spectrum Access System) states a channel is "free" that just means it is not currently in use by a higher priority user such as an incumbent or PAL user.  Any GAA can request a channel in use in the area by another GAA.  You have no interference protection rights as a GAA / 3rd tier user.  Again the SAS can and should assist you with finding a clean channel and potently working as a mediator between GAA users but there is no guarantee or protections.

This might be helpful.  @10:10 this video from google SAS's tech team talks about this very thing.

https://www.youtube.com/watch?v=jJ5pUE68ndE


On 11/30/2021 2:53 PM, Shane Ronan wrote:
What makes it different is once you've been allocated spectrum, which for in-building use is almost guaranteed, no one else can use that spectrum, so it's guaranteed. Unlike Wifi, where any device can transmit in those frequencies.

Shane

On Tue, Nov 30, 2021 at 3:45 PM Michael Thomas <mike () mtcc com> wrote:


    On 11/30/21 12:43 PM, Shane Ronan wrote:
    What do you mean 3rd Tier?

    General Authorized Access? Taken from some random site looking it up.

    Mike


    On Tue, Nov 30, 2021 at 2:47 PM Michael Thomas <mike () mtcc com> wrote:


        On 11/30/21 11:38 AM, Shane Ronan wrote:
        The spectrum is CBRS and there are MANY benefits to 5G over
        Wifi, including but not limited to guaranteed spectrum.

        For the 3rd tier I assume that works pretty much like wifi
        spectrum, right? It seems to be at about 3.5Ghz so that would
        be pretty short distance. Other than handoff what other
        advantages does it have over wifi (can wifi do seamless l2
        handoff these days?)

        Mike





        On Tue, Nov 30, 2021 at 2:29 PM Michael Thomas
        <mike () mtcc com> wrote:

            https://aws.amazon.com/about-aws/whats-new/2021/11/preview-aws-private-5g/

            Why would somebody want this over wifi? And what
            spectrum are they
            using? They can't just camp on allocated spectrum, right?

            Mike

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