On Jan 9, 2013 6:54 AM, "David Lang" <david@lang.hm> wrote:

On Tue, 8 Jan 2013, Mark Allman wrote:

Did any of their 90 homes contained laptops connected over WiFi?

Almost certinly,

Yeah - they nearly for sure did.  (See the note I sent to bloat@ this
morning.)

but if the connection from the laptop to the AP is 54M and the
connection from the AP to the Internet is 1G, you are not going to
have a lot of buffering taking place. You will have no buffering on
the uplink side, and while you will have some buffering on the
downlink side, 54M is your slowest connection and it takes a
significantly large amount of data in flight to fill that for seconds.

54Mbps *might* be your slowest link.  It also could be somewhere before
incoming traffic gets anywhere close to any of the CCZ gear.  E.g., if
the traffic is from my DSL line the bottleneck will be < 1Mbps and on my
end of the connection.

Wait a min here, from everything prior to this it was sounding like you were in a fiber-to-the-home experimental area that had 1G all the way to the houses, no DSL involved.

Are we all minunderstanding this?

David Lang

But, regardless, none of this matters for the results presented in the
paper because our measurements factor out the local residences.  Again,
see the paper and the note I sent this morning.  The measurements are
taken between our monitor (which is outside the local homes) and the
remote host somewhere out across the Internet.  We are measuring
wide-area and remote-side networks, not the local FTTH network.

allman

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