[AusNOG] NBN Satellite Latency

[Mark Smith]

On 8 Feb. 2017 21:35, "Scott Weeks" <surfer at mauigateway.com> wrote:



Late response.  Been out...

>> I've done these things over geo-sat and they're not as
>> bad as many try to portray.

> If you lower your natural human tolerances for
> interactivity.
>
> Geostationary satellite well exceeds the 0.1
> second latency limit below which humans perceive
> things to be responding instantly.

> https://www.nngroup.com/articles/response-times-3-important-limits/



Yeah, that's why I wrote this:

:: and how skilled folks are about waiting to talk and not
:: talk over each other.  That last part will affect the
:: normal uninitiated consumer, I'd imagine.

It takes some getting used to, but the guys I worked with
all did long-distance radio as well, so it was ok for them.


Having to adapt to it is what makes it an undesirable user experience. It
is a mentally frustrating experience, requiring concentrated effort to
adapt, because it is outside our normal tolerances. I still remember how
hard it was taking to relatives overseas over satellite when I was growing
up.

Geostationary satellite is commonly talked about as though it is just
another link layer candidate for Internet access, equal to other
terrestrial options, where as it should really be considered the only
option left when all other much lower latency terrestrial options have been
proven to be infeasible.

I'd hope that proof exists for the NBN satellites given their cost.

Regards,
Mark.


scott











--- markzzzsmith at gmail.com wrote:

From: Mark Smith <markzzzsmith at gmail.com>
To: surfer at mauigateway.com
Cc: "<ausnog at lists.ausnog.net>" <ausnog at lists.ausnog.net>
Subject: Re: [AusNOG] NBN Satellite Latency
Date: Mon, 6 Feb 2017 12:07:35 +1100

On 6 Feb. 2017 11:57 am, "Scott Weeks" <surfer at mauigateway.com> wrote:



--- ausnog at rossw.net wrote:
From: Ross Wheeler <ausnog at rossw.net>

...satellite delay is and will always be "undesirable" (if not unusable)
for the sort of real-time interactive stuff I do, including almost
exclusively CLI environment, VoIP, telepresence (controlling things
remotely)...
----------------------------------------------------------


I've done these things over geo-sat and they're not as bad as many
try to portray.


If you lower your natural human tolerances for interactivity.

Geostationary satellite well exceeds the 0.1 second latency limit below
which humans perceive things to be responding instantly.

https://www.nngroup.com/articles/response-times-3-important-limits/



It all depends on how close to the sat radio you
are, how well you've set up your QoS and how skilled folks are about
waiting to talk and not talk over each other.  That last part will
affect the normal uninitiated consumer, I'd imagine.

scott


































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