many thank's to your hints and proposel. Reading the recommended
papers respectively Internet-Sites i found that the most recommend
way is to use udp-protocoll instead tcp for slow wireless
connections.Unfortunately (might be i looked over the lot of papers)
i did'nt found a software availabe on the market which i can install
and use between a Client and a Server (might be a Proxy-Server). Has
anywhere a idea which company offers such a software ?

Many thanks again

Gerhard Behnke