From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-x22b.google.com (mail-qt0-x22b.google.com [IPv6:2607:f8b0:400d:c0d::22b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id CFF613BA8E for ; Fri, 3 Nov 2017 19:04:01 -0400 (EDT) Received: by mail-qt0-x22b.google.com with SMTP id f8so5077019qta.5 for ; Fri, 03 Nov 2017 16:04:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=GPdj6oabyafY7MkTvDB0uQa7hNyj8HzaSOyODnk4uHc=; b=J5aun8tCgMTv8aRuhX/aogviR9OukR+zkhcKuL+bj85f1P17Qn+NfbQWFcJBs5GBqB 91Qlt1Ika+nq3o6ZcDFalh5hIVVa5GySXIffnJp9ahdUdYrygdoXGsJLgk4B6BZTD4+9 cU7v25/MxjEkltgx2sERfXspp7Rl9kZFW8yYCoM6kFnaPjVNx+QrM3jsIgHOJLzMynj8 SxDGYbL8+uVT7koDLtKQLQCkfWUcqJsE5Ea3gTba57PPH5/yvrlGWbrTpDfhXyGXL14t CY1lg+7U4IBfV2SY7uD+IN1RlMDcnehr4eeZadaTNXYWlQW16GbmY2Is7bbUnPHlHYVC pixQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=GPdj6oabyafY7MkTvDB0uQa7hNyj8HzaSOyODnk4uHc=; b=SfMP/NM0u6ZpzsGMJTQEuctt9I+Y4A+BR7JQVjxxEj7VWO9qrup6IKMAd1x92b+iDH okiACaG/aNIDn0U1llrgd3VPNhwYupaSLy+TLkeXCgzVjQv2Vvq+tEFLkpDV9rj1gFD4 jVKyEkUFBuu4cwubCGJeWzyVAYLaDiOUtuzXsTl9PN/wtrU5n76MSSc0YYjrEU4bvRLu EgjUBPeTbjETdP9ys8rcJhXkyvUTK4AtiGSEjQksSfu35Od7nEdkqD8wtKg6CMEubY6i Z3LQ1gpVvBwU2CTPLdnwOttKuByhjzBT08aTrQ6yJmc9TXACDLBy2VjKL7IL7eg+QYQH zf3g== X-Gm-Message-State: AJaThX7lI86ZrxWMh/J3sPDnOE03G8wAJ+LMDGrYge5SM2p85bTs5OBV H1zMmJEMuB3sL0dEhr83YOT5lD5+VpFZtfq5JKvNAA== X-Google-Smtp-Source: ABhQp+Q8F3ByOHAfQEYtFaxdV7FF0zRHF+7vWx7q8jH5J0o3ZiA6Gni6oxsHyx6yP6N3WBejmTcrFZI0loRlVjV6YIA= X-Received: by 10.237.62.71 with SMTP id m7mr6596183qtf.269.1509750241201; Fri, 03 Nov 2017 16:04:01 -0700 (PDT) MIME-Version: 1.0 References: <87tvybm0x2.fsf@toke.dk> In-Reply-To: <87tvybm0x2.fsf@toke.dk> From: Aaron Wood Date: Fri, 03 Nov 2017 23:03:50 +0000 Message-ID: To: =?UTF-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= , make-wifi-fast@lists.bufferbloat.net Content-Type: multipart/alternative; boundary="001a113e3cfcd39171055d1c1e97" Subject: Re: [Make-wifi-fast] Wiring up a wireless testbed X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 03 Nov 2017 23:04:01 -0000 --001a113e3cfcd39171055d1c1e97 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable What this setup also removes is random noise, which is good for repeatability, but bad for real-life testing. My experiences doing similar are that there isn=E2=80=99t much of a grey area between a =E2=80=9Cgreat= =E2=80=9D throughput/packet error rate and =E2=80=9Cnothing works=E2=80=9D. It also removes the real-world crosstalk between the antennas. So good for some things, especially automated tests, but it=E2=80=99s not a replacement for real field tests in the presence of random noise. On Fri, Nov 3, 2017 at 15:51 Toke H=C3=B8iland-J=C3=B8rgensen wrote: > Since I had to (physically) move my wireless testbed recently, I had to > figure out a way to run reliable WiFi experiments in a cramped server > room. I ended up wiring everything up instead of running over the air, > and documented the process here, in case anyone wants to replicate it: > > https://blog.tohojo.dk/2017/11/building-a-wireless-testbed-with-wires.htm= l > > Also, if anyone sees any fatal flaw in that setup, please do let me know = :) > > -Toke > _______________________________________________ > Make-wifi-fast mailing list > Make-wifi-fast@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/make-wifi-fast --001a113e3cfcd39171055d1c1e97 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable What this setup also removes is random noise, which is good for repeatabili= ty, but bad for real-life testing. My experiences doing similar are that t= here isn=E2=80=99t much of a grey area between a =E2=80=9Cgreat=E2=80=9D th= roughput/packet error rate and =E2=80=9Cnothing works=E2=80=9D.

It a= lso removes the real-world crosstalk between the antennas.

So good f= or some things, especially automated tests, but it=E2=80=99s not a replacem= ent for real field tests in the presence of random noise.
On Fri, Nov 3, 2017 at 15:51 Toke H=C3=B8ilan= d-J=C3=B8rgensen <toke@toke.dk> w= rote:
Since I had to (physically) m= ove my wireless testbed recently, I had to
figure out a way to run reliable WiFi experiments in a cramped server
room. I ended up wiring everything up instead of running over the air,
and documented the process here, in case anyone wants to replicate it:

https://blog.tohojo.dk/201= 7/11/building-a-wireless-testbed-with-wires.html

Also, if anyone sees any fatal flaw in that setup, please do let me know :)=

-Toke
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