On Thu 06 Feb 2025 at 09:34 +0000, Ingemar Johansson S wrote: > OK, so that means that time based loss detection is not yet > implemented in QUIC stacks, or ? > > The reason I ask is that we poll the interest in the support for out > of order delivery of packets in 5G. The outline is that we ensure in > order delivery for up to some given milliseconds, to handle possible > HARQ retransmissions on the MAC layer. Beyond that we forward packets > as they are processed by the radio stack. > > The rationale behind this is to avoid that packets for latency > sensitive flows (streams) are delayed more than necessary if they > share the same data radio bearer as other streams. > > We see that TCP Linux is robust to packet reordering (up to 1 RTT > reordering depth) and fast retransmits are avoided (except in the > initial phase when the reordering window grows). Thus I wonder if > there are plans to make also QUIC stacks support time based RACK?
I think you're asking for this: https://www.rfc-editor.org/rfc/rfc9002.html#name-time-threshold ? Though I'm not sure what stack *actually* implement. Cheers, Floris
