Re: [Make-wifi-fast] Fwd: [Battlemesh] BSS load element patch

[Michael Welzl <michawe@ifi.uio.no>]

Hi,

I find this intriguing:


> On 07 Aug 2015, at 12:09, Dave Taht <dave.taht@gmail.com> wrote:
> 
> ---------- Forwarded message ----------
> From: Paul Fuxjaeger <fuxjaeger@ftw.at>
> Date: Fri, Aug 7, 2015 at 11:28 AM
> Subject: Re: [Battlemesh] BSS load element patch
> To: Battle of the Mesh Mailing List <battlemesh@ml.ninux.org>
> 
> 
> On 05.08.15 14:57, Bastian Bittorf wrote:
> 
>> Does e.g. a client gets informed about a congested network
> 
> Exactly.
> It allows nearby clients/nodes to make MUCH better decisions. [1]

Does anybody have information about how this is being used? Any examples?

Cheers,
Michael


> 
>> or in other words: does it solve a problem?
> 
> ###
> Essentially, very small local channel utilization measurement reports
> are broadcasted to all direct neighbors by piggybacking them onto
> IEEE802.11 beacons. [2]
> ###
> 
> 1) Maintainers could better distinguish causes of link problems [3]
> 2) Our current algorithms for rate control, routing and
> network-selection could make better decisions if they have access this
> "remote channel load" statistic.
> 
> So, we think this feature could be really helpful. It increases the
> networks capability to self-regulate, for a small price. [4]
> 
> 
> -paul
> 
> PS: Arthur did all the hard work, I'm just doing the cheap talking.
> 
> 
> 
> 
> 
> 
> [1] that is probably the reason for recent AP models in the enterprise
> segment already broadcasting it.
> 
> [2] channel utilization measured at the receive antenna port of the
> device that is sending that beacon.
> 
> [3] if LTE-U/LAA/muLTEfire becomes widespread :( we need a way to detect
> that such a nearby non-IEEE80211 source is blocking the channel.
> 
> [4] Currently, OpenWRT sends around 200bytes PSDUs per beacon (depending
> on mode etc). Assuming a 100ms beacon interval and 1Mbit/s, adding
> these 7 bytes to them would increase the channel utilization each
> beaconing node is generating by less than 0.06% of total airtime.
> 
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> 
> -- 
> Dave Täht
> worldwide bufferbloat report:
> http://www.dslreports.com/speedtest/results/bufferbloat
> And:
> What will it take to vastly improve wifi for everyone?
> https://plus.google.com/u/0/explore/makewififast
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