A closed-loop transmission control mechanism for satellite interactive services

The second-generation digital satellite broadcasting system (DVB-S2) offers not only increased efficiency in static transmission schemes, but also provides adaptability for time-varying propagation environments via the ACM (adaptive coding and modulation) feature. This paper analyses the efficiency of a closed-loop transmission control scheme in an interactive DVB-S2/DVB-RCS network providing triple-play services. A satellite resource management system is proposed, which receives reception quality feedback from end-users in order to adapt in real-time the downlink transmission scheme. Since the capacity of the downlink changes, a cross-layer adaptation scheme is employed to adapt the bandwidth of the offered services.