QoS Support on DVB-S2/RCS: IP-friendly Cross-Layer Approaches

This tutorial focuses on the design of an interactive multibeam broadband satellite (MBS) system with QoS support. A DVB-S2/RCS transparent architecture and fixed terminals using adaptive physical layer will be considered. DVB-S2 transmission power and symbol rate are assumed to be constant, and hence ACM (adaptive coding and modulation) yields a bit rate that is time and space dependant according to the channel conditions. DVB-RCS transmission power is assumed to be constant and DRA (dynamic rate adaptation) along with AC (adaptive coding) yield both bit and symbol rate time and space dependant. During the tutorial, a number of cross-layer mechanisms will be introduced whereby the physical, the medium access control (MAC) and the IP layers share knowledge of the channel dynamics in presence of ACM. The cross-layer design approach allows further improvements on packet data admission, scheduling and policing to maximize both capacity and user satisfaction while meeting QoS constraints