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<div class="moz-cite-prefix">On 4/Aug/20 16:35, Etienne-Victor
Depasquale wrote:<br>
<br>
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<blockquote type="cite"
cite="mid:CAAcx0vDobZd2fidQVqy_9Lf9RFp34A+6ZBOUNgSDXhaU7auXXg@mail.gmail.com">
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<div dir="ltr">I think that it's validation of QoS that really
matters now.
<div><br>
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<div>If I were to base on <a
href="https://www.keysight.com/zz/en/events/america/webinars.html?D2C=2036435&isSocialSharing=Y&partnerref=emailShareFromGateway"
moz-do-not-send="true">this recent video from Keysight</a> (warning:
requires registration), </div>
<div>then it seems that there's a lot of emphasis on making
grounded claims about the QoS that the operator sells.<br>
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<br>
Well, selling QoS is great, but does it actually help the customer
in the end.<br>
<br>
One of the biggest draws to l3vpn's back in the day was that they
provided "awesome QoS". What untrained customers thought was
excellent QoS, is what we engineers knew as RSVP-TE. To the
untrained eye, bandwidth reservation = excellent QoS. What the
customer's weren't always told was that when it all hits the fan,
even your PQ traffic may not be guaranteed final delivery on a 200%
congested port due to a neighboring outage. And that's the traffic
the customer is paying top-dollar for, not to get dropped, ever,
hehe.<br>
<br>
It's just like the fuss I always faced when landing at SFO... from
point of embarkation, transit and in the cabin, Business or First
class service done right. Arrive SFO; no Priority lane; after
traveling for nearly 30hrs. Not being an American, I can't use
Global Entry. Not sure if that has since changed, but that's
real-world QoS for you :-)...<br>
<br>
So in a world where the majority of Internet traffic lives on a
public Internet which you can't QoS end-to-end, what will network
slicing deliver in real, QoS terms?<br>
<br>
For me, 5G QoS would be great if it had something to do with
priority or discriminated access from the device to the radio (first
mile). But I'm not exactly sure how to practically do that.<br>
<br>
QoS applied AFTER the packets leave the radio network and hit the
fibre backbone may not necessarily create real value if the
application is normal Internet access. <br>
<br>
If the 5G operator is using the same backbone to carry voice and
data, then yes, QoS can help to ensure they don't drop any VoIP
calls. But then that is already included in the price I pay for
making a phone call, and can't (or shouldn't) be sold extra to me
:-).<br>
<br>
So again, not sure what QoS a 5G operator is going to sell to a 5G
end-user (single or large scale).<br>
<br>
Mark.<br>
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