Return link optimization for internet service provision using DVB-S networks

Satellite based Digital Video Broadcasting (DVB-S) allows the same low cost satellite dish to receive both television programs and Internet traffic. The satellite system is used to construct a high-speed simplex distribution system, while the return path, needed for the Internet service will be provided using a low speed terrestrial network. The bandwidth asymmetry between the return and forward paths results in a problem, which we have termed "ACK congestion". A number of techniques that may alleviate ACK congestion over a DVB satellite link are analysed through simulation. The paper also presents a new ACK Compaction technique to eliminate ACK congestion, and an ACK spacing technique to preserve the self-clocking principle of TCP.

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