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Re: [EToSat] What we are looking for from QUIC

"Border, John" <John.Border@hughes.com> Mon, 09 December 2019 17:39 UTC

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From: "Border, John" <John.Border@hughes.com>
To: "Morten V. Pedersen" <morten@steinwurf.com>
CC: "etosat@ietf.org" <etosat@ietf.org>
Thread-Topic: [EToSat] What we are looking for from QUIC
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Date: Mon, 09 Dec 2019 17:39:43 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/etosat/yKHgiUAO8WHAFA4jlE3g4ONZNH0>
Subject: Re: [EToSat] What we are looking for from QUIC
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I guess technically I was making an assumption but...

FEC adds overhead.  The amount of overhead which is tolerable in a given case depends on a lot of factors including the error rate and the latency.  If the link is clean, the overhead is wasted bandwidth which could be used for more goodput.


John


-----Original Message-----
From: EToSat <etosat-bounces@ietf.org> On Behalf Of Morten V. Pedersen
Sent: Monday, December 09, 2019 6:20 AM
To: etosat@ietf.org
Subject: Re: [EToSat] What we are looking for from QUIC

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Hi John,
Could you elaborate on the point below:

--------------------------

On 12/3/19 7:43 PM, Border, John wrote:
> We are looking at FEC to help with the packet loss problem and large 
> windows to address the throughput problem.  Since enabling FEC and 
> very large windows (especially initial windows) will not be good 
> defaults for general use, we need some sort of learning capability to 
> know when they should be used.

--------------------------

Is it because of computational complexity or similar?

All the best,
Morten

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