I couldn’t work out why the 200ms figure was so rubbish, in the window. Perhaps the iPad had made a bad choice; struggling to do 4G but badly when it could have alternatively done 3G but well. Is there even such a thing ? I don’t know how the criteria work nor how such a system makes the decision, whether on performance or reliability or certain hard stat-thresholds associated with the two protocol sets for 3G vs LTE.
Anyway, if such a thing does exist, then I thought that perhaps it was using 4G that was unreliable when it would have done better to give up, drop to 3G if that is more reliable and get fewer Ln re-txs and is more speed, since I would assume all the possible retx operations would be hurting the rtt. Is that possible? Lower basic rate but you get the data there first try.