Efficient Cross-Layer Design of the Air Interface in a DVB-RCS-based Satellite Architecture Supporting Multimedia Services (Greece-Italy)

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Projects - International Projects

Duration

2006-2008

Budget

€ 11,700

Short Description

Recently the request for multimedia services has been rapidly increasing and satellite networks appear to be attractive for a fast service deployment and to extend the typical service area of terrestrial systems. The major drawback in using satellites is the high propagation delay (due to the significant distance to reach satellites, especially those on GEostationary Orbit - GEO) that can have an important impact on the end-to-end delay user requirements. Moreover, atmospheric conditions may affect the data transmitted via satellite in a very heavy way. Since the satellite bandwidth is a relatively scarcer resource than the terrestrial one (e.g., optical transport networks), and the environment is harsher, the radio resource management has a crucial role for the system efficiency and economy. This project addressed the transmission of multimedia contents through heterogeneous terrestrial and satellite mobile communication systems. More specifically, it aimed at providing the required performance improvement techniques in order to achieve Quality of Service (QoS) levels similar or comparable with terrestrial mobile networks. The target was the definition of a new protocol architecture for the air interface of satellite communication systems to improve the utilization of resources and the QoS provided to users. In particular, the study was here addressed to the definition of a Medium Access Control (MAC) layer that manages resources in a way that is aware of the physical and transport layer behavior; if needed, the MAC layer can also intervene on transport layer traffic to block its unacceptable increase in the presence of congestion.