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diode
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Joined: Sun Sep 13, 2009 8:40 pm

Nstreme improvments wanted

Fri Jul 27, 2018 8:21 pm

Hi,

I'am a wisp in Austria, running the network with 100% Mikrotik Clients & APs, around 50 Terabyte per month transported. I have Wisps since 2000 ...

It's a very noisy environment here, we're using 100% nstreme protocol for all sectors as this gives us the best results. It would be pleasent to see nstreme stability & speed improvements.

--- tipps for the others here:

We have partly fixed the nstreme disconnect problem by disallowing speeds with low reduncy coding.
MCS 7 or MCS 15 have very little forward error correction information, when you disallow them everything gets more stable & the average throughput is higher. We usually also disallow 6, 9 & 12 Mbit & MCS 0, MCS 8 in order to speed up beacons and overhead transfer - if a link can't handle 12 or 18 mbit you better disconnect the customer anyway.

band=5ghz-a/n basic-rates-a/g=12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,54Mbps
ht-basic-mcs=mcs-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6
ht-supported-mcs=mcs-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-9,mcs-10,mcs-11,mcs-12,
mcs-13,mcs-14,mcs-16,mcs-17,mcs-18,mcs-19,mcs-20,mcs-21,mcs-22,mcs-23 hw-retries=15

Also its very whise to isolate the sectors on the sender from each other. no antenna should hear the neighbor better than -50 dbm, ideally less than -60 dbm in order to hear your own customers and not only the neighbor sector. if your neighbor sector is received with -30 dbm you shall not wonder why you get customer disconnects ....

we use camping aluminium cooking pots for that (if you use a sxt sa or a sxt hg as a 24 degree "sector"), or try to mount sectors on different sides of buildings with the building in between.

BW Maria

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