[Battlemesh] 802.11ac improvements [was: What hardware still works?]
Adam Longwill
adam.longwill at gmail.com
Thu Feb 25 15:21:36 UTC 2016
What are the preferred chips for routers? I'm talking to some manufacturers
now and seeing what it would take to manufacture something for our purposes.
Above Atheros is mentioned, which kind? what's the difference between each
iteration or family?
On Feb 25, 2016 10:18 AM, "Bastian Bittorf" <bittorf at bluebottle.com> wrote:
> * Juliusz Chroboczek <jch at pps.univ-paris-diderot.fr> [25.02.2016 16:13]:
> > Interesting. Perhaps the .11n driver doesn't implement the short guard
> > interval? SGI + 256-QAM as compared to SGI + 64-QAM would be a 48%
> > increase, which would fit your figures.
>
> it does use SGI, you can see it in the minstrel-table (but only if used).
> e.g.:
> (see second column: SGI/LGI)
>
> root at box:~ cat
> /sys/kernel/debug/ieee80211/phy1/netdev:wlan1/stations/f8:1a:67:33:1b:be/rc_stats
>
> best ____________rate__________
> ________statistics________ ________last_______ ______sum-of________
> mode guard # rate [name idx airtime max_tp] [avg(tp) avg(prob)
> sd(prob)] [prob.|retry|suc|att] [#success | #attempts]
> HT20 LGI 1 MCS0 0 1477 5.6 5.6 100.0
> 0.0 100.0 3 0 0 1 1
> HT20 LGI 1 MCS1 1 739 10.5 9.6 82.2
> 1.7 100.0 0 0 0 6 7
> HT20 LGI 1 MCS2 2 493 14.9 14.9 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 LGI 1 MCS3 3 369 18.7 18.7 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 LGI 1 MCS4 4 246 25.3 23.1 82.2
> 1.7 100.0 0 0 0 6 7
> HT20 LGI 1 MCS5 5 185 30.6 27.7 81.4
> 1.0 100.0 5 0 0 6 18
> HT20 LGI 1 MCS6 6 164 32.9 13.4 36.9
> 1.5 0.0 0 0 0 4 13
> HT20 LGI 1 MCS7 7 148 35.0 0.0 0.0
> 0.0 0.0 0 0 0 0 13
> HT20 LGI 2 MCS8 10 739 10.5 10.5 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 LGI 2 MCS9 11 369 18.7 18.7 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 LGI 2 MCS10 12 246 25.3 25.3 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 LGI 2 P MCS11 13 185 30.6 30.6 96.0
> 1.4 100.0 5 0 0 42 53
> HT20 LGI 2 MCS12 14 123 38.9 27.6 64.1
> 0.8 14.2 6 0 0 7 19
> HT20 LGI 2 MCS13 15 93 44.8 0.0 0.0
> 0.0 0.0 0 0 0 0 12
> HT20 LGI 2 MCS14 16 82 47.3 0.0 0.0
> 0.0 0.0 0 0 0 0 13
> HT20 LGI 2 MCS15 17 74 49.4 0.0 0.0
> 0.0 0.0 0 0 0 0 12
> HT20 LGI 3 MCS16 20 493 14.9 14.9 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 LGI 3 MCS17 21 246 25.3 25.3 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 LGI 3 B MCS18 22 164 32.9 32.9 94.6
> 1.2 100.0 5 0 0 3805 4328
> HT20 LGI 3 D MCS19 23 123 38.9 30.9 71.9
> 1.9 50.0 6 0 0 55 69
> HT20 LGI 3 MCS20 24 82 47.3 0.0 0.0
> 0.0 0.0 0 0 0 0 12
> HT20 LGI 3 MCS21 25 62 52.9 0.0 0.0
> 0.0 0.0 0 0 0 0 12
> HT20 LGI 3 MCS22 26 55 55.2 0.0 0.0
> 0.0 0.0 0 0 0 0 13
> HT20 LGI 3 MCS23 27 49 57.2 0.0 0.0
> 0.0 0.0 0 0 0 0 12
> HT20 SGI 1 MCS0 30 1329 6.2 6.2 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 SGI 1 MCS1 31 665 11.5 7.3 57.5
> 1.5 100.0 0 0 0 4 6
> HT20 SGI 1 MCS2 32 443 16.1 16.1 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 SGI 1 MCS3 33 332 20.2 20.2 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 SGI 1 MCS4 34 222 27.1 27.1 100.0
> 0.0 100.0 5 0 0 1 1
> HT20 SGI 1 MCS5 35 166 32.8 25.9 71.3
> 1.7 0.0 5 0 0 32 62
> HT20 SGI 1 MCS6 36 148 35.0 25.4 65.3
> 0.9 100.0 0 0 0 6 12
> HT20 SGI 1 MCS7 37 133 37.2 0.0 0.0
> 0.0 0.0 0 0 0 0 12
> HT20 SGI 2 MCS8 40 665 11.5 11.5 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 SGI 2 MCS9 41 332 20.2 20.2 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 SGI 2 MCS10 42 222 27.1 24.8 82.2
> 1.7 100.0 0 0 0 6 7
> HT20 SGI 2 MCS11 43 166 32.8 28.8 79.2
> 1.6 33.3 5 0 0 218 278
> HT20 SGI 2 MCS12 44 111 41.0 30.5 67.0
> 0.6 33.3 6 0 0 152 173
> HT20 SGI 2 MCS13 45 83 46.9 0.0 0.0
> 0.0 0.0 0 0 0 0 12
> HT20 SGI 2 MCS14 46 74 49.2 0.0 0.0
> 0.0 0.0 0 0 0 0 13
> HT20 SGI 2 MCS15 47 67 51.4 0.0 0.0
> 0.0 0.0 0 0 0 0 12
> HT20 SGI 3 MCS16 50 443 16.1 16.1 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 SGI 3 MCS17 51 222 27.1 27.1 100.0
> 0.0 100.0 0 0 0 1 1
> HT20 SGI 3 A MCS18 52 148 35.0 35.0 99.9
> 0.0 100.0 5 1 1 1576 1613
> HT20 SGI 3 C MCS19 53 111 41.0 31.1 68.4
> 1.2 0.0 6 0 0 1377 1492
> HT20 SGI 3 MCS20 54 74 49.2 0.0 0.0
> 0.0 0.0 0 0 0 0 12
> HT20 SGI 3 MCS21 55 56 54.9 0.0 0.0
> 0.0 0.0 0 0 0 0 12
> HT20 SGI 3 MCS22 56 49 57.0 0.0 0.0
> 0.0 0.0 0 0 0 0 13
> HT20 SGI 3 MCS23 57 44 59.0 0.0 0.0
> 0.0 0.0 0 0 0 0 12
>
> Total packet count:: ideal 6973 lookaround 347
> Average # of aggregated frames per A-MPDU: 1.0
>
> bye, bastian
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