RE:(2) Preparing for discussion on what to do about the multipath extension milestone

[Madhan Raj Kanagarathinam]

I second Pr.Olivier. Multipath Protocol gives more benefits and flexibility for Smartphones. Apart from the Aggregation (Cellular + Wi-Fi) and Reliability (Cellular <-> Wi-Fi), it can also provide much advantages (like ndiffmode). The multipath scheduling, path management(pm), and congestion control(cc) is a bit of a challenge, but fairly explored and addressed area. With the deployment of MPTCP in Smartphones for more than 4 years, I feel that MPTCP scheduler/pm/cc has worked pretty good.   Multipath QUIC, with inherent advantages of QUIC protocol, can provide much more benefits than MPTCP.     --------- Original Message --------- Sender : Olivier Bonaventure <olivier.bonavent...@uclouvain.be> Date : 2020-09-30 01:42 (GMT+5:30) Title : Re: Preparing for discussion on what to do about the multipath extension milestone   Spencer, > > On Fri, Sep 25, 2020 at 5:00 AM Lars Eggert <l...@eggert.org > <mailto:l...@eggert.org>> wrote: > > In parallel to progressing the "base drafts" towards RFC > publications, the WG should now also begin to pick up the pace on > our other adopted work items (ops drafts, extensions, etc.) > > One important other discussion item is what to do about the > multipath extension milestone, which some have suggested should be > dropped, while others still show interest to pursue it. > > > So, I'd like to understand the suggestion to drop this milestone, before > I start trying to discuss that suggestion :-). I'd like to understand this as well. > > In conversations with individual folk, I've heard these concerns about > QUIC multipath: > > - Whether it will be possible to evaluate multipath performance at > scale, both for evaluating proposals and testing implementations. We already have plenty of experience with MPTCP with several large deployments, including : - MPTCP on all iPhones since 2013 with a growing number of applications - MPTCP on Android smartphones in South Korea for WiFi/4G offload - MPTCP in hybrid access networks that are used by different network operators to combine xDSL and LTE Multipath extensions to QUIC would be applicable in these different use cases > - The complexity involved in making decisions dynamically about which > path to send a given packet on (which could be a research topic, given > certain constraints and goals). The packet scheduling problem is a much simpler problem in multipath transport protocol than congestion control. I would not consider this as a research topic given all the experience we have with MPTCP > If I've misunderstood or misquoted, my apologies, of course. Please > correct me. > > What other concerns do people have? I'd like to get all the objections > out at the beginning of the discussion. Same for me Olivier