On 24 Aug, 2014, at 6:49 am, Hal Murray wrote: >>> Yep... I remember a neat paper from colleagues at Trento University that >>> piggybacked TCP's ACKs on link layer ACKs, thereby avoiding the collisions >>> between TCP's ACKs and other data packets - really nice. Not sure if it >>> wasn't just simulations, though. > >> that's a neat hack, but I don't see it working, except when one end of the >> wireless link is also the endpoint of the TCP connection (and then only for >> acks from that device) > > That could be generalized to piggybacking any handy small packet onto the > link layer ACK. > > Of course, then you have to send back a link layer ACK for the extra info. > Does that converge?
No, you don't. If the link-layer ack (plus payload) didn't get through, the other end will (usually) retransmit the frame anyway. So you don't get recursive acks. :-) - Jonathan Morton _______________________________________________ Bloat mailing list Bloat@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/bloat