[Bloat] sigcomm wifi

[Jonathan Morton]

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