Scalable QoS management in next generation GEO-Satellite networks

This paper focuses on the Architectural changes and adaptive QoS mechanisms that should be supported by next generation Satellite networks. Scalability is an important issue in the perspective of heavy traffic load support on Satellite links and in the integration of Terrestrial wired and wireless backbone and the Satellite segment. QoS Adaptability, on the other hand, is an important requirement that QoS architectures, MAC, network and application layer protocols should offer in order to support multimedia traffic (e.g. MPEG-2) and to meet QoS requirements in time changing wireless channel conditions (e.g. long and short term fading). After a brief overview of IP-QoS Scalable architectures in GEO-Satellite networks, in order to offer a scalable IP end-to-end QoS among satellite terminals, QoS mechanisms of the Scalable CORE architecture are considered in a DVB-RCS Satellite system and an adaptive resource management is applied. EF and AF are considered in the SCORE Satellite network and a Traffic Resource Management with EF and AF services is evaluated. Performance evaluations are considered in terms of Burst/GOP loss ratio, satellite utilization and admitted calls.