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Re: [6gip] 6G

Alexandre Petrescu <alexandre.petrescu@gmail.com> Thu, 14 January 2021 11:17 UTC

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To: Lars Eggert <lars@eggert.org>
Cc: Kaippallimalil John <john.kaippallimalil@futurewei.com>, "Flinck, Hannu (Nokia - FI/Espoo)" <hannu.flinck@nokia-bell-labs.com>, "6gip@ietf.org" <6gip@ietf.org>
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From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Date: Thu, 14 Jan 2021 12:17:43 +0100
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Subject: Re: [6gip] 6G
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Le 14/01/2021 à 09:52, Lars Eggert a écrit :
> Hi,
> 
> On 2021-1-14, at 10:37, Alexandre Petrescu <alexandre.petrescu@gmail.com> wrote:
>> It might be set that the bandwidth is 500Gbit/s and that RTT latency on
>> the air 1 micro-second.
> 
> that's pretty much where we are with datacenter technology today.

which makes think 1Gbit/s is where Ethernet on my laptop was in 2010 or 
so, and that nowadays 4G+ is not at 1Gbit/s.

maybe we would need to review the timeline and not expect 500Gbit/s in 
year 2030 (the year of first wide deployments of 6G).

Maybe this:

           bandwidth
           1Gbit/s     10Gbit/s     100Gbit/s    1Tbit/s
---------------------------------------------------------
year      2005        2010         2015         2020
Ethernet
---------------------------------------------------------
year      2010        2020         2025?        2030?
WiFi
---------------------------------------------------------
year      2025?       2030?        2035?        2040?
5G/6G

would these expectations of bandwidth in time be reasonable?

Or should we expect 500Gbit/s in year 2030?

Alex



> 
> The limits here are due to physical constraints - the speed of light in vacuum is about 300000 km/sec. An RTT of 1us means that the maximum distance to a base station needs to be below 150m. (Not including coding overheads, etc.)
> 
> Unless you claim that "6G" will be a radio LAN, I don't think these assumptions are sensible.
> 
> Lars
>

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