Hello Lucas

No, there are multiple QUIC connections (multipath!). Please see slide #5 in
https://github.com/quicwg/wg-materials/blob/master/interim-20-10/Multipath%20in%203GPP%20ATSSS.pdf

Bulk data and low-latency are kept separate. Each QoS flow has its own 
connection.

Best regards
Hannu

From: Lucas Pardue <[email protected]>
Sent: Monday, October 26, 2020 10:20 AM
To: Flinck, Hannu (Nokia - FI/Espoo) <[email protected]>
Cc: Florin Baboescu <[email protected]>; David 
Schinazi <[email protected]>; Mirja Kuehlewind 
<[email protected]>; [email protected]
Subject: Re: More context on ATSSS use case

Hey,
On Mon, 26 Oct 2020, 06:50 Flinck, Hannu (Nokia - FI/Espoo), 
<[email protected]<mailto:[email protected]>> 
wrote:
Hello Lucas

When a PDU session is established (PDU session is like setting up L2) a set of 
attributes will be exchanged between the UE and the 5G network. Part of the is 
the type of PDU session, such as multiaccess-PDU with steering mode information 
(e.g. load balancing, active-standby, etc. see the presentation for more 
details). The MP-QUIC connection is established per IP flow (5 tuple). With 
this information the UE will steer the traffic to the corresponding 
multipath-quic connection.

I don't follow, sorry.

If a single IP flow carrying QUIC is used for multiplexing both low-latency and 
bulk data, how do you resolve this?

Cheers
Lucas



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