Scheduling Techniques for Satellite Systems with Adaptive Coding and Modulation

Abstract

This paper deals with the design of scheduling approaches for forward link IP multimedia data transmission in second generation DVB-S systems (in a scenario with transparent satellite), where adaptive coding and modulation (ACM) is applied as fade mitigation technique and DiffServ IP QoS approach is adopted. In particular, the impact of outdated physical layer information on the BER stability, due to queuing delay in conventional buffering systems is analysed. Furthermore, a queuing management and scheduling technique that avoids the outdated physical layer information are proposed and evaluated.