Date: Fri, 26 Oct 2012 06:31:51 -0700 From: Adrian Chadd <adrian@freebsd.org> To: Johann Hugo <jhugo@meraka.csir.co.za> Cc: freebsd-wireless@freebsd.org Subject: Re: 11n channel width Message-ID: <CAJ-VmomFsXeG_VzVDgfupAT9GtZA93xw1c1KQV-qk=4Oo8%2BhxQ@mail.gmail.com> In-Reply-To: <201210261518.18442.jhugo@meraka.csir.co.za> References: <201210221556.08616.jhugo@meraka.csir.co.za> <201210261406.05385.jhugo@meraka.csir.co.za> <CAJ-Vmo=aCCkh1%2BUH3xf%2BMfYjvrm25E0EZ4umb2xaYyXO0HzH-A@mail.gmail.com> <201210261518.18442.jhugo@meraka.csir.co.za>
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On 26 October 2012 06:18, Johann Hugo <jhugo@meraka.csir.co.za> wrote: > And the difference between a 1x1 and a 2x2 802.11n adapter ? It's more complicated - since if you're not doing aggregation, the overheads per frame eat in to your efficiency % and when you're transmitting at high MCS or multiple streams, you don't necessarily get a linear increase in throughput. If aggregation is correctly working, you should see ~ 150MBit/sec TCP between two 2x2 40MHz nodes, and roughly half/quarter that for 1-stream 20 and 2-stream 20 (or 1 stream 20 versus 1 stream 40.) Adrian
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