From: Michael Richardson <mcr@sandelman.ca>
To: Keith Winstein <keithw@mit.edu>
Cc: "bloat@lists.bufferbloat.net" <bloat@lists.bufferbloat.net>,
"end2end-interest@postel.org" <end2end-interest@postel.org>
Subject: Re: [Bloat] [e2e] bufferbloat paper
Date: Thu, 10 Jan 2013 08:46:17 -0500 [thread overview]
Message-ID: <27380.1357825577@sandelman.ca> (raw)
In-Reply-To: <CAMzhQmMHi6e-opq2ySpYZgcrbf454WSjV5gLjjPuHxM0bTgcBw@mail.gmail.com>
Thanks for the reply, comments below.
>>>>> "Keith" == Keith Winstein <keithw@mit.edu> writes:
>> Have you considered repeating your test with two phones?
Keith> Yes, we have tried up to four phones at the same time.
>> Can the download on phone1 affect the latency seen by a second phone?
Keith> In our experience, a download on phone1 will not affect the unloaded
Keith> latency seen by phone2. The cell towers appear to use a per-UE
Keith> (per-phone) queue on uplink and downlink. (This is similar to what a
Keith> commodity cable modem user sees -- I don't get long delays just
Keith> because my neighbor is saturating his uplink or downlink and
Keith> causing a
Keith> standing queue for himself.)
This is good news of a sort.
It means that there is no shared xmit queue on the tower, and that the
4G/LTE/whatever-they-call-it-today business of moving voice to VoIP is
going to do okay.
The question then becomes: how to get all of one's low-latency traffic
onto that second channel!
--
] Never tell me the odds! | ipv6 mesh networks [
] Michael Richardson, Sandelman Software Works | network architect [
] mcr@sandelman.ca http://www.sandelman.ca/ | ruby on rails [
next prev parent reply other threads:[~2013-01-10 13:47 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-08 7:35 [Bloat] " Ingemar Johansson S
2013-01-08 10:42 ` [Bloat] [e2e] " Keith Winstein
2013-01-08 12:19 ` Ingemar Johansson S
2013-01-08 12:44 ` Keith Winstein
2013-01-08 13:19 ` Ingemar Johansson S
2013-01-08 15:29 ` dpreed
2013-01-08 16:40 ` Mark Allman
2013-01-09 14:07 ` Michael Richardson
2013-01-10 7:37 ` Keith Winstein
2013-01-10 13:46 ` Michael Richardson [this message]
2013-01-08 15:04 ` dpreed
2013-01-18 22:00 ` [Bloat] " Haiqing Jiang
2013-01-10 13:48 [Bloat] [e2e] " dpreed
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