A Cross-layer architecture for DVB-S2 Broadband Satellite systems with QoS support

In this paper we propose an architecture to provide Quality of Service (QoS) guarantees for DVB-S2 broadband satellite systems. The proposed architecture provides low complexity on its implementation and can seamlessly inter-operate with terrestrial IP networks. The solution is designed in compliance with the ETSI-BSM-QoS framework and provides a detailed design at the Satellite Independent- Satellite Dependent (SI-SD) layers in order to provide QoS guarantees by means of traffic priorities. Particularly, at the SI layers several mechanism are defined to deal with QoS differentiation based on the DiffServ framework. Conversely, at the SD layers the application of different DVB-S2 channel adaptations are assumed. The proposed architecture is evaluated using the NS-2 simulator. The key results show that the implementation of this architecture, enables to keep control of the satellite system load while guaranteeing the QoS levels for the high priority traffic classes even though bandwidth variations due to rain events are experienced.