I realise the answer may depend on which wireless technology we are talking about. Information on any of the above would be interesting. I am interested in knowing if there are continuous transmissions in both directions. Its my understanding that there would be one tcp ack for each receive window. What sort of size TCP 'receive windows' do these kinds of connections use?
RFC3481 may be relavent here. ACKs will need to be transmitted from the receiver. Fewer may be necessary if you work around the normal TCP slow start behavior by using a large initial window (number of bytes in-flight, not yet ACKnowledged).