[multipathtcp] LISA - Linked Slow-Start for MPTCP => ICCRG

[Michael Welzl <[e-mail]>]

Dear all,

LISA is a simple algorithm that couples MPTCP subflows in slow-start, to reduce bursts that happen when multiple sub-flows start up with a delay and all send their IW, all in SS.
We found this effect to be generally bad (i.e., improved with LISA :-) ) when subflows do share a bottleneck, and we find that this slightly more conservative behavior also doesn't hurt (actually, sometimes it's a benefit) when they do *not* share a bottleneck. After all, slow-start is very aggressive anyway - is it really so important for the 2nd, 3rd... subflow of MPTCP to be  *that* aggressive?

We presented it to MPTCP at the last IETF, and in Yokohama.
There's a draft: https://tools.ietf.org/html/draft-barik-mptcp-lisa-01
and a page with slides, a published paper with results, and code:  http://heim.ifi.uio.no/runabk/lisa/

The way ahead, as agreed with the MPTCP chairs, is to either publish via MPTCP if their future charter will allow, or else publish this via ICCRG.
Either way, for now, discussion of this draft should happen in the ICCRG mailing list. We authors would greatly appreciate feedback - so far, we didn't get many comments!

Cheers,
Michael (with Runa & Simone)