So we looked at optimisation for routes, including multipath, and optimisation for flow rates/congestion pricing. What scope is there for improving the end-to-end protocols themselves in detail - for the first, we see MPTCP, which enables single source-destination pairs to take advantage of multipath routes, and for the second, QUIC, which reduces the latency in the application/transport/network pipeline through several mechanism improvements - of course, there are also now people working on multipath QUIC too, since we seem to be about to deprecate TCP in various forms (at least for web apps).
One question in class today was about QUIC migration (how does a session survive a change of IP address) - the details are discussed in this draft
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