[Bloat] [Starlink] [LibreQoS] [Rpm] On FiWi

Sebastian Moeller moeller0 at gmx.de
Wed Mar 15 13:43:21 EDT 2023

Hi Bob,

I like your design sketch and the ideas behind it.

> On Mar 15, 2023, at 18:32, rjmcmahon via Bloat <bloat at lists.bufferbloat.net> wrote:
> The 6G is a contiguous 1200MhZ. It has low power indoor (LPI) and very low power (VLP) modes. The pluggable transceiver could be color coded to a chanspec, then the four color map problem can be used by installers per those chanspecs. https://en.wikipedia.org/wiki/Four_color_theorem

	Maybe design this to be dual band from the start to avoid the up/down "tdm" approach we currently use? Better yet go full duplex, which might be an option if we get enough radios that not much beamforming/MIMO is necessary? I obviously lack deep enough understanf=dingwhether this makes any sense or is just buzzword bingo from my side :)

> There is no CTS with microwave "interference" The high-speed PHY rates combined with low-density AP/STA ratios, ideally 1/1, decrease the probability of time signal superpositions. The goal with wireless isn't high densities but to unleash humans. A bunch of humans stuck in a dog park isn't really being unleashed. It's the ability to move from block to block so-to-speak. FiWi is cheaper than sidewalks, sanitation systems, etc.
> The goal now is very low latency. Higher phy rates can achieve that and leave the medium free the vast most of the time and shut down the RRH too. Engineering extra capacity by orders of magnitude is better than AQM. This has been the case in data centers for decades. Congestion? Add a zero (or multiple by 10)

	I am weary of this kind of trust in continuous exponential growth... at one point we reach a limit and will need to figure out how to deal with congestion again, so why drop this capability on the way? The nice thing about AQMs is if there is no queue build up these basically do nothing... (might need some design changes to optimize an AQM to be as cheap as possible for the uncontended case)...

> Note: None of this is done. This is a 5-10 year project with zero engineering resources assigned.
> Bob
>> On Tue, Mar 14, 2023 at 5:11 PM Robert McMahon
>> <rjmcmahon at rjmcmahon.com> wrote:
>>> the AP needs to blast a CTS so every other possible conversation has
>>> to halt.
>> The wireless network is not a bus. This still ignores the hidden
>> transmitter problem because there is a similar network in the next
>> room.
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