Emulating ADSL bandwidth shaping

Mikael Abrahamsson swmike at swm.pp.se
Tue May 4 09:44:06 CDT 2010


On Tue, 4 May 2010, Chris Boyd wrote:

> Most of the ADSL installations I've seen in SBC 13 state area had 
> interleaving turned on, which significantly increases latency.  I 
> suspect that's why many cable MSOs in the same territory have "cable is 
> better for gaming" marketing campaigns running all the time.
>
> So the latency you see on an ADSL line is dependent on how the carrier 
> set up the DSLAM.

Interleaving is good because it reduces bit error rate on the line. Would 
be good though if the carrier let the customer change the properties of 
the line to optimize for different things, high snr target/no interleaving 
for low bw/low BER/low latency applications, low snr target/interleaving 
for file transfers.

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se




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